WO2020183764A1

WO2020183764A1 - Vaporization device

Info

Publication number: WO2020183764A1
Application number: PCT/JP2019/037842
Authority: WO
Inventors: 慶彦鶴; 祐二澄田; 一也河田; 孝祐東; 諭史近口
Original assignee: 株式会社神戸製鋼所
Priority date: 2019-03-11
Filing date: 2019-09-26
Publication date: 2020-09-17
Also published as: EP3922938A4; EP3922938A1; EP3922938B1; ES2973144T3

Abstract

The present application discloses a vaporization device that vaporizes liquefied gas by the heat exchange of the liquefied gas with a heating liquid. The vaporization device comprises: a heat transfer panel configured from a plurality of heat transfer tubes that are provided standing therein to guide liquefied gas and that are aligned in a horizontal direction; a trough that is configured to supply the heating liquid to the outer surface of the plurality of the heat transfer tubes; and a manifold in which is formed an outflow port out of which the heating liquid supplied to the trough flows. The trough has: a bottom wall that extends in the direction in which the plurality of heat transfer tubes are aligned; and a first end wall and a second end wall that are provided standing at positions spaced apart from each other in the direction in which the plurality of heat transfer tubes are aligned. An inflow port into which the heating liquid flows is formed in the first end wall. The manifold is positioned at the first end wall side.

Description

Vaporizer

The present invention relates to a vaporizer used for vaporizing liquefied gas.

Various vaporizers used for vaporizing low-temperature liquefied gas have been developed. The vaporizer disclosed in Patent Document 1 has a trough for sprinkling a heating liquid having a temperature higher than that of the liquefied gas on the outer surface of a plurality of heat transfer tubes erected so as to guide the liquefied gas upward. There is. While the heating liquid sprinkled by the trough flows down along the outer surfaces of the heat transfer tubes, the liquefied gas flowing in the heat transfer tubes is heated with the heating liquid on the outer surfaces of the heat transfer tubes. Exchange. As a result of heat exchange with the heating liquid, the liquefied gas vaporizes.

The trough is arranged at a position adjacent to each of the plurality of heat transfer tubes in the horizontal direction orthogonal to the alignment direction of the plurality of heat transfer tubes, and is configured to store the heating liquid. The trough is box-shaped, which is long in the alignment direction of the plurality of heat transfer tubes. The trough has a rectangular bottom wall that is long in the alignment direction of the plurality of heat transfer tubes, and an outer peripheral wall that is erected above the outer peripheral edge of the bottom wall. The bottom wall and the outer peripheral wall form a storage space in which the heating liquid is stored. When the heating liquid exceeds the volume of the trough, the heating liquid exceeding the volume overflows from the trough box. The heating liquid overflowing from the trough then flows down the outer surface of the plurality of heat transfer tubes.

Regarding the supply of the heating liquid to the trough, an inflow port into which the heating liquid flows is formed on the bottom wall of the trough. A water supply pipe extending from the manifold is connected to the inflow port of the trough. The water supply pipe extends below the bottom wall of the trough substantially parallel to the bottom wall and guides the heating liquid to a position below the inflow port of the trough. The tip of the water supply pipe is bent upward below the trough inlet and is connected to the trough inlet.

The water supply pipe extends in the longitudinal direction of the trough and forms a long flow path for the heating liquid. If the water supply pipe is formed to guide the heating liquid over a long path, not only resistance is added to the flow of the heating liquid, but also the material cost of the water supply pipe is increased.

Japanese Unexamined Patent Publication No. 2017-150784

An object of the present invention is to provide a vaporizer having a structure capable of supplying a heating liquid to a trough by a short route.

The vaporizer according to one aspect of the present invention is configured to vaporize the liquefied gas under heat exchange between the liquefied gas and the heating liquid having a temperature higher than that of the liquefied gas. The vaporizer supplies the heating liquid to the heat transfer panel configured so that a plurality of heat transfer tubes erected so as to guide the liquefied gas are arranged in the horizontal direction and the outer surface of the plurality of heat transfer tubes. The truffles are arranged at a position lower than the upper edge of the heat transfer panel, and the truffles are arranged on one end side of the truffles in the alignment direction of the plurality of heat transfer tubes. It is provided with a manifold configured to supply the heating liquid to the heat pipe. The trough is aligned with a bottom wall extending in the alignment direction of the plurality of heat transfer tubes and a first end wall erected at an end of the bottom wall located on the manifold side in the alignment direction. It includes a second end wall erected at another end of the bottom wall that is distant from the first end wall in the direction. An inflow port into which the heating liquid flows is formed on the first end wall.

The above-mentioned vaporizer makes it possible to supply the heating liquid to the trough in which the heating liquid is stored by a short route.

The object, features and advantages of the present invention will be made clearer by the following detailed description and accompanying drawings.

It is the schematic perspective view of the open rack type vaporization apparatus of 1st Embodiment. It is a schematic cross-sectional view of a vaporizer. It is a schematic sectional view of the box body of a vaporizer. It is a schematic perspective view of the resistance member arranged in a box body. It is a schematic perspective view of another resistance member arranged in a box body. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a single lid member. It is a schematic cross-sectional view of the box body which has a double lid member. It is a schematic cross-sectional view of the box body which has a double lid member. It is a schematic cross-sectional view of the box body which has a double lid member. It is a schematic cross-sectional view of the box body which has a double lid member. FIG. 6 is a schematic cross-sectional view of another embodiment of another box body having a double lid member. FIG. 6 is a schematic cross-sectional view of another embodiment of another box body having a double lid member. FIG. 6 is a schematic cross-sectional view of another embodiment of another box body having a double lid member. It is a schematic cross-sectional view of another Example of a box body having a double lid member. It is a schematic cross-sectional view of another Example of a box body having a double lid member. It is a schematic cross-sectional view of another Example of a box body having a double lid member. It is a schematic cross-sectional view of a box body which has a structure in which a resistor comes into contact with a lid member. It is a schematic cross-sectional view of a box body which has a structure in which a resistor comes into contact with a lid member. It is a schematic cross-sectional view of a box body which has a structure in which a resistor comes into contact with a lid member. It is a schematic cross-sectional view of a box body which has a structure in which a resistor comes into contact with a lid member. It is the schematic sectional drawing of the box body which has the structure which provided the vertical lid in the lid member. It is the schematic sectional drawing of the box body which has the structure which provided the vertical lid in the lid member. It is the schematic sectional drawing of the box body which has the structure which provided the vertical lid in the lid member. It is the schematic sectional drawing of the manifold of a vaporizer. It is a schematic perspective view of the vaporizer which has a box body which a perforated plate is attached to an inflow port. It is the schematic sectional drawing of the resistance member of another type. It is the schematic sectional drawing of the resistance member of another type. It is the schematic sectional drawing of the resistance member of another type. It is the schematic perspective view of the open rack type vaporization apparatus of 2nd Embodiment. FIG. 3 is a schematic cross-sectional view of the vaporizer of FIG. 34.

<First Embodiment>
FIG. 1 is a schematic perspective view of the open rack type vaporizer (ORV) 100 of the first embodiment. FIG. 2 is a schematic cross-sectional view of the vaporizer 100 on a virtual vertical plane. The vaporizer 100 will be described with reference to FIGS. 1 and 2.

The vaporizer 100 is configured to vaporize the liquefied natural gas (hereinafter referred to as "liquefied gas") by exchanging heat with a heating liquid having a temperature higher than that of the liquefied gas. The gas phase natural gas obtained as a result of heat exchange is referred to as "vaporized gas" in the following description. In this embodiment, seawater is used as the heating liquid. Alternatively, a liquid having a temperature higher than that of the vaporized gas may be used as the heating liquid.

The vaporizer 100 includes a gas flow portion in which the liquefied gas and the vaporized gas flow, and a seawater flow portion in which the seawater flows.

The gas flow portion includes a lower manifold 111, an upper manifold 112, and a plurality of heat transfer panels 113. The lower manifold 111 and the upper manifold 112 extend in the horizontal direction. The upper manifold 112 extends substantially parallel to the lower manifold 111 at a position separated upward from the lower manifold 111. The plurality of heat transfer panels 113 are connected to the upper manifold 112 and the lower manifold 111. The plurality of heat transfer panels 113 are arranged in the horizontal direction at intervals. The extending directions of the lower manifold 111 and the upper manifold 112 coincide with the alignment directions of the plurality of heat transfer panels 113.

The lower manifold 111 is used to distribute the liquefied gas to the plurality of heat transfer panels 113. The plurality of heat transfer panels 113 are used to exchange heat with the seawater supplied from the seawater flow portion. The upper manifold 112 is used to aggregate the vaporized gas obtained as a result of heat exchange between the liquefied gas and seawater. A supply device (not shown) configured to supply vaporized gas to a predetermined demand destination (not shown) is connected to the upper manifold 112.

Each of the plurality of heat transfer panels 113 includes a lower header tube 114, an upper header tube 115, and a plurality of heat transfer tubes 116. The lower header pipe 114 and the upper header pipe 115 are extended in the horizontal direction perpendicular to the extending direction of the lower manifold 111 and the upper manifold 112 at positions separated from each other in the vertical direction. The plurality of heat transfer tubes 116 extend vertically between the lower header tube 114 and the upper header tube 115, respectively. The lower header tube 114 extends from the lower manifold 111 to form the lower edge of the heat transfer panel 113, while the upper header tube 115 extends from the upper manifold 112 to form the upper edge of the heat transfer panel 113. doing. The plurality of heat transfer tubes 116 extend upward from the lower header tube 114 and are connected to the upper header tube 115. The plurality of heat transfer tubes 116 are arranged in the extending direction of the lower header tube 114 and the upper header tube 115. The alignment direction of the plurality of heat transfer tubes 116 is referred to as a "first horizontal direction" in the following description. The horizontal direction perpendicular to the first horizontal direction (that is, the extension direction of the lower manifold 111 and the upper manifold 112) is referred to as a "second horizontal direction" in the following description.

The seawater flow portion is configured to sprinkle seawater on a plurality of heat transfer tubes 116 of each of the plurality of heat transfer panels 113. The seawater flow site includes a sprinkling site for storing and sprinkling seawater and a supply site for supplying seawater to the sprinkling site. In addition to these, the seawater flow part is used to adjust the flow rate of seawater from the supply part to the sprinkling part, and to suppress the uplift of the seawater level formed in the sprinkling part. It includes a configured uplift suppression section.

The supply parts include a pump 121 configured to discharge seawater, a manifold 122 configured to guide the seawater discharged from the pump 121 in the second horizontal direction, and a plurality of supplies connected to the manifold 122. Includes tube 123 and. The manifold 122 extends in the second horizontal direction at a position separated from the plurality of heat transfer panels 113 in the first horizontal direction. The manifold 122 is formed with a plurality of outlets 125 from which seawater flowing into the manifold 122 flows out. These outlets 125 are spaced apart in the second horizontal direction. A plurality of supply pipes 123 are connected to these outlets 125. The end of the supply pipe 123 connected to the outlet 125 is referred to as the "upstream end" in the following description. The end of the supply pipe 123 opposite to the upstream end is referred to as the "downstream end" in the following description. The downstream end is connected to the watering site.

The watering site includes a plurality of troughs 130 arranged corresponding to the plurality of supply pipes 123. The plurality of troughs 130 are arranged so as to be alternately arranged with the plurality of heat transfer panels 113 in the second horizontal direction.

Regarding the height position of each of the plurality of troughs 130, the trough 130 is arranged at a position lower than that of the upper header pipe 115. The trough 130 is arranged so as to be adjacent to the upper part of the plurality of heat transfer tubes 116 of the heat transfer panel 113 (above the intermediate position of the plurality of heat transfer tubes 116 in the height direction) in the second horizontal direction. The trough 130 is located higher than the manifold 122 on which the outlet 125 is formed.

Each of the plurality of troughs 130 has a box body 131 configured to store seawater flowing in through the corresponding supply pipe 123, and a plurality of heat transfer tubes of the heat transfer panel 113 corresponding to the seawater overflowing from the box body 131. It includes a guide portion 139 configured to guide to the outer surface.

The box body 131 is a rectangular box that is long in the first horizontal direction and short in the second horizontal direction. The box body 131 is open upward. The box body 131 includes an elongated substantially rectangular bottom wall 132 in the first horizontal direction, and a peripheral wall 133 erected above the outer peripheral edge of the bottom wall 132.

The peripheral wall 133 has a pair of

side walls

134 and 135 erected upward from a pair of longitudinally extending edges of the bottom wall 132 and a first erected upward from a pair of laterally extending edges of the bottom wall 132. It includes one end wall 136 and a second end wall 137. The

side walls

134 and 135 are erected at positions separated from each other in the second horizontal direction, while the first end wall 136 and the second end wall 137 are erected at positions separated from each other in the first horizontal direction. ing.

The lengths of the

side walls

134 and 135 and the bottom wall 132 in the first horizontal direction are set to a value larger than the length of the pipe rows of the plurality of heat transfer tubes 116 arranged in the first horizontal direction. The box 131 is arranged so that the

side walls

134 and 135 overlap the entire row of the plurality of heat transfer tubes 116 in the second horizontal direction.

The first end wall 136 is arranged closer to the outlet 125 of the manifold 122 than the second end wall 137. The first end wall 136 is formed with an inflow port 138 to which the downstream end of the supply pipe 123 is connected (see FIG. 1). The center of the inflow port 138 is located below the center of the first end wall. The position of the inflow port 138 of the first end wall 136 in the second horizontal direction substantially coincides with the position of the outflow port 125 of the manifold 122 in the second horizontal direction. Since the trough 130 is located higher than the manifold 122, the inflow port 138 formed on the first end wall 136 of the trough 130 is also located higher than the outlet 125 of the manifold 122.

With respect to troughs 130 other than the outermost two troughs 130 among the four troughs 130 arranged at intervals in the second horizontal direction, the height dimensions of the first end wall 136 and the second end wall 137 are the side wall 134. , 135 is set to a value larger than the height dimension. That is, the upper edges of the first end wall 136 and the second end wall 137 extend at positions higher than the upper edges of the

side walls

134 and 135.

With respect to the right trough 130 of the two outermost troughs 130, the height dimensions of the first end wall 136, the second end wall 137 and the right side wall 135 are such that the left side wall 134 (ie, the heat transfer panel 113 side). The value is set to be larger than the height dimension of the facing side wall 134). That is, the upper edges of the first end wall 136, the second end wall 137, and the side wall 135 extend at a position higher than the upper edge of the side wall 134. That is, the side wall on the side opposite to the side wall has a larger height than the side wall on the heat transfer panel 113 side.

With respect to the left trough 130 of the two outermost troughs 130, the height dimensions of the first end wall 136, the second end wall 137 and the left side wall 134 are such that the right side wall 135 (ie, the heat transfer panel 113 side). The value is set to be larger than the height dimension of the facing side wall 135). That is, the upper edges of the first end wall 136, the second end wall 137, and the side wall 134 extend at a position higher than the upper edge of the side wall 135.

The guide portion 139 forms an inclined surface inclined downward from the upper edge of at least one of the

side walls

134 and 135 toward the heat transfer panel 113 to which the seawater is supplied. The inclined surface allows seawater that is supplied to the trough 130 beyond the volume of the box body 131 and overflows beyond the upper edges of the

side walls

134 and 135 of the box body 131 to a plurality of heat transfer tubes 116 of the corresponding heat transfer panel 113. Used to guide.

Regarding the trough 130 on the left side of the two outermost troughs 130, the guide portion 139 is provided so as to project to the right from the upper edge of the side wall 135 on the heat transfer panel 113 side. The guide portion 139 is not provided on the side wall 134 on the opposite side. With respect to the trough 130 on the right side of the two outermost troughs 130, the guide portion 139 is provided so as to project to the left from the upper edge of the side wall 134 on the left side. For the remaining troughs, the guide 139 is provided so as to project outward from the upper edges of the

side walls

134, 135.

The flow rate adjusting part and the uplift suppressing part are arranged in the box 131. The flow rate adjusting portion and the suppressing portion will be described with reference to FIGS. 1 and 3. FIG. 3 is a schematic vertical sectional view of the box body 131.

The flow rate adjusting unit includes a closing member 140 attached to the inner surface of the box 131 so as to partially close the inflow port 138. The closing member 140 is used to make the inflow of seawater substantially uniform among the plurality of troughs 130.

As the closing member 140, an orifice having an opening 141 formed in the first horizontal direction can be preferably used. The opening 141 has a smaller area than the inflow port 138. The closing member 140 is attached to the inner surface of the first end wall 136 and / or the

side walls

134, 135. In addition, the closing member 140 is removable from the first end wall 136 and / or the

side walls

134, 135. For example, the side edge of the closing member 140 may be inserted into the vertical groove portion formed on the inner surface of the

side walls

134 and 135.

When an orifice attached to one trough 130 out of a plurality of troughs 130 is replaced with another orifice having a smaller opening area, the inflow of seawater into the trough 130 in which the orifice is replaced is reduced. The inflow of seawater into other troughs 130 increases. On the contrary, when a large orifice is newly installed in the opening area, the amount of seawater flowing into the trough 130 in which the orifice has been replaced increases, while the amount of seawater flowing into the other trough 130 decreases. It is preferred that an orifice having an appropriate opening area be selected as the closing member 140 for each of the troughs 130 so that a substantially uniform distribution of seawater is obtained among the troughs 130.

The ridge suppressing portion includes a resistance member arranged between the first end wall 136 and the second end wall 137. The resistance member is arranged so that the seawater flowing in from the inflow port 138 collides with the resistance member before colliding with the second end wall 137. The resistance member includes a baffle plate (resistor) 151 erected above the bottom wall 132. Three baffle plates 151 are shown in FIG.

The plurality of baffle plates 151 are arranged at intervals in the first horizontal direction between the first end wall 136 and the second end wall 137. The plurality of baffle plates 151 are attached to the bottom wall 132 and / or the

side walls

134 and 135. The plurality of baffle plates 151 may be removable from the bottom wall 132 and / or the

side walls

134, 135.

The height dimension of the baffle plate 151 is smaller than the height dimension of the peripheral wall 133. Therefore, a space for seawater to flow in the first horizontal direction is formed above the baffle plate 151.

The flow of liquefied gas and seawater in the vaporizer 100 will be described below.

Regarding the flow of liquefied gas in the gas flow portion, the liquefied gas is supplied to the lower manifold 111 by a pump (not shown). After flowing into the lower manifold 111, the liquefied gas flows into the lower header pipe 114 of each of the plurality of heat transfer panels 113. After flowing into the lower header pipe 114, the liquefied gas flows upward along a plurality of heat transfer tubes 116 extending upward from the lower header pipe 114. During this time, the liquefied gas exchanges heat with the seawater supplied from the seawater flow site and becomes a vaporized gas. The vaporized gas flows upward and flows into the header pipe 115. After that, the vaporized gas flows through the upper header pipe 115 and is collected in the upper manifold 112.

Regarding the flow of seawater in the seawater flow part, the seawater is supplied to the manifold 122 by the pump 121. The seawater is guided in the second horizontal direction by the manifold 122 and distributed to a plurality of supply pipes 123 attached to the manifold 122. The seawater that has flowed through the supply pipe 123 flows into the corresponding trough 130. The seawater flowing into the trough 130 forms a liquid layer in the space surrounded by the bottom wall 132 and the peripheral wall 133. When the inflow of seawater into the trough 130 exceeds the volume of the box 131, the seawater overflows beyond the upper edges of the

side walls

134 and 135. The seawater then flows down along the slope of the guide 139. As a result, the seawater is sprinkled on the upper portions of the plurality of heat transfer tubes 116 located on the side of the box 131.

The sprinkled seawater flows down while forming a liquid film on the outer surface of the plurality of heat transfer tubes 116. Since the liquefied gas flows upward inside the plurality of heat transfer tubes 116, the seawater can exchange heat with the liquefied gas. That is, the liquefied gas is vaporized. The vaporized gas is collected in the upper manifold 112 through the plurality of upper header pipes 115 as described above.

The flow path of seawater from the manifold 122 to the plurality of troughs 130 is compared with the structure of the conventional vaporizer as follows.

With respect to the conventional structure, the seawater flow path is configured so that the seawater flows in from the bottom surface of the trough, so that the seawater flow path extends from the manifold beyond the first end wall to the bottom surface of the trough. It is connected to the formed inlet. Unlike the conventional structure, the supply pipe 123 does not extend from the manifold 122 beyond the first end wall 136, which not only saves the material cost of the supply pipe 123 but also flows into the seawater flowing in the supply pipe 123. The resistance is low.

Regarding the conventional structure, fluid parts such as butterfly valves and orifices are generally arranged in the flow path extending from the manifold to multiple troughs. These fluid components are used to suppress variations in the amount of seawater flowing into a plurality of troughs. In this embodiment, the closing member 140 is used in order to suppress the variation in the amount of seawater among the plurality of troughs. The closing member 140 is compared to a conventional fluid component as follows.

Regarding the replacement of the closing member 140, the operator performing the replacement work can easily access the closing member 140 through the upward opening of the box body 131. The operator can pull out the existing closing member 140 from the box body 131 and install a new closing member in the box body 131. Unlike the structure in which the butterfly valve and the orifice are attached to the supply pipe 123, the replacement of the closing member 140 does not require disassembly of the supply pipe 123. In addition, the large space above the trough 130 is utilized for replacement work rather than the narrow space provided by the short supply pipe 123. Therefore, the replacement of the closing member 140 is relatively easy.

Seawater that has passed through the blocking member 140 collides with a plurality of baffle plates 151. The effect of these baffle plates 151 on the seawater flowing in the box 131 will be described below.

FIG. 3 shows a straight line (solid line) extending in the first horizontal direction and a curved line drawn by a dotted line above the plurality of obstacle plates 151. The solid line schematically represents the liquid level of seawater assumed in the presence of a plurality of obstacle plates 151. The dotted line schematically represents the liquid level of seawater assumed in the absence of the plurality of obstacle plates 151.

In the absence of the plurality of baffle plates 151, the seawater that has sequentially passed through the inflow port 138 and the opening 141 of the closing member 140 (orifice) collides vigorously with the inner surface of the second end wall 137. A part of the seawater that collides with the second end wall 137 flows vigorously upward along the inner surface of the second end wall 137. As a result, as shown by the dotted line, the liquid level of the seawater in the box 131 rises upward near the inner surface of the second end wall 137.

On the other hand, in the presence of the plurality of baffle plates 151, a part of the seawater that has sequentially passed through the inflow port 138 and the opening 141 of the closing member 140 (orifice) is the baffle plate 151 (that is, the first end wall) arranged at the most upstream. It collides with the baffle plate 151) arranged at the position closest to 136. A part of the seawater that collides with the obstacle plate 151 turns and flows in a direction other than the first horizontal direction, while the other seawater passes over the obstacle plate 151 and flows toward the second end wall 137. The seawater that has passed over the most upstream obstacle plate 151 collides with the next obstacle plate 151. As a result of the seawater colliding with the plurality of baffle plates 151 in sequence, the seawater component that flows vigorously toward the second end wall 137 gradually decreases. Since the collision force generated between the seawater and the second end wall 137 is smaller in the presence of the plurality of obstruction plates 151 than in the absence of the plurality of obstruction plates 151, the collision force of the seawater with respect to the second end wall 137 occurs. The momentum of the upward seawater flow caused by this also weakens. As a result, the height of the liquid level uplift near the inner surface of the second end wall 137 becomes low.

The number of baffle plates 151 to be arranged is determined so that the liquid level of seawater in the trough 130 is substantially flat based on the flow velocity of the seawater flowing into the trough 130 and the flow mode of the seawater in the trough 130. It is preferable to be done. Therefore, the resistance member may be one or two baffle plates 151, or may be a baffle plate 151 exceeding three.

As the resistance member, instead of the baffle plate 151, another resistance member configured to collide with the seawater flowing in from the inflow port 138 may be used. Alternative members that can be used as resistance members are described with reference to FIGS. 4 and 5. 4 and 5 are schematic perspective views of the alternative member.

Instead of the baffle plate 151 having no through holes formed, a perforated plate 152 having a large number of through holes formed in the first horizontal direction may be used as a resistance member (see FIG. 4). Since seawater can pass through the through hole of the perforated plate 152, the perforated plate 152 may have substantially the same height dimension as the peripheral wall 133.

Instead of the baffle plate 151 which is thin in the first horizontal direction, a block body 153 whose dimensional difference in the first horizontal direction, the second horizontal direction, and the vertical direction is smaller than that of the baffle plate 151 may be used as the resistance member (FIG. 5). See). It is preferable that the shape and size of the member used as the uplift suppressing portion are determined so that the liquid level of the seawater in the box 131 is substantially flat.

The obstruction plate 151, the perforated plate 152, and the block body 153 exemplified as the uplift suppressing portion relax the momentum of the seawater toward the second end wall 137 before the seawater collides with the second end wall 137, and the liquid level rises. Suppress. However, the ridge suppressing portion may be a member arranged so as to collide with the upward flow of the heating liquid generated in the box body 131. The ridge suppressor arranged to collide with the upward flow of the heating liquid will be described with reference to FIGS. 1, 6 to 25. 6 to 25 are schematic cross-sectional views of the box 131.

The ridge suppressing portion may be a plate-shaped lid member 154 arranged in the box body 131 near the second end wall 137. A large number of through holes are formed in the lid member 154. Therefore, as the lid member 154, a perforated plate (plate member) can be preferably used. The lid member 154 may be used alone as a ridge suppressing portion (see FIG. 6), or may be used as a ridge suppressing portion together with a resistance member (for example, a baffle plate 151).

The lid member 154 extends in the first horizontal direction from the vicinity of the second end wall 137 and is arranged so as to lie substantially horizontally. The lid member 154 partitions a part of the internal space of the box body 131 up and down near the second end wall 137. The pair of side edges of the lid member 154 may be attached to the inner surfaces of the

side walls

134, 135. The downstream edge of the lid member 154 may be attached to the inner surface of the second end wall 137 and abut on the inner surface of the second end wall 137 (see FIG. 6). Alternatively, the first horizontal position of the lid member 154 may be determined such that the downstream edge of the lid member 154 is slightly spaced from the inner surface of the second end wall 137 (see FIG. 7). The downstream edge of the lid member 154 is close to the inner surface of the second end wall 137, whereas the upstream edge of the lid member 154 is significantly distant from the inner surface of the upstream first end wall 136. It is preferable that the lid member 154 is removable from the box body 131.

The lid member 154 is arranged at a position higher than the inflow port 138. Therefore, most of the seawater that has flowed into the box 131 from the inflow port 138 through the opening of the closing member 140 (orifice) collides with the inner surface of the second end wall 137 below the lid member 154.

The upward seawater flow generated as a result of the collision below the lid member 154 collides with the lower surface of the lid member 154. As a result, most of the seawater that collides with the lid member 154 flows toward the first end wall 136 upstream along the lower surface of the lid member 154. Therefore, the uplift of the liquid level near the second end wall 137 downstream is effectively suppressed.

A part of the seawater that collides with the lid member 154 flows into the space above the lid member 154 through a through hole that penetrates the lid member 154 in the vertical direction. Therefore, the lid member 154 does not excessively hinder the formation of a liquid layer of seawater above the lid member 154. That is, the lid member 154 does not excessively prevent seawater from overflowing from the downstream end of the trough 130.

The lid member may not have a through hole as long as the effect of suppressing the local uplift of the liquid level can be obtained over the entire trough 130. In this case, seawater can flow into the space above the lid member through the space between the upstream edge of the lid member and the first upstream wall 136.

The lid member 154 of FIGS. 6 and 7 is arranged closer to the second end wall 137 than to the first end wall 136. However, the lid member 154 may be located closer to the first end wall 136 than to the second end wall 137 (see FIG. 8). In this case, the upward flow of the heating liquid generated near the first end wall 136 on which the inflow port 138 is formed collides with the lid member 154. As a result, the upward flow of the heating liquid near the first end wall 136 is weakened, and the uplift of the liquid level of the heating liquid near the first end wall 136 is suppressed.

The lid member 154 of FIGS. 6 to 9 is arranged near the first end wall 136 or the second end wall 137. However, the lid member 154 is arranged at a position substantially equidistant from the first end wall 136 and the second end wall 137 (that is, a substantially intermediate position in the longitudinal direction (first horizontal direction) of the box body 131). It may be (see FIG. 9). In this case, the uplift of the liquid level of the heating liquid is suppressed at a substantially intermediate position in the longitudinal direction of the box body 131.

6 to 8 show a single perforated plate as the lid member 154. However, a plurality of perforated plates (plate members) 155 may be arranged in the box 131 as lid members 154 (see FIG. 10). These perforated plates 155 are arranged at intervals in the first horizontal direction. In addition, these perforated plates 155 are arranged at a substantially constant height position (higher than the inflow port and lower than the upper edge of the box 131). The most downstream perforated plate 155 corresponds to the lid member 154 described with reference to FIGS. 6-8. That is, the most downstream perforated plate 155 contributes to the suppression of the uplift of the liquid level near the second end wall 137. The other perforated plate 155 contributes to suppressing the waviness of the liquid level caused by the seawater from the inflow port 138. The waviness of the liquid surface is suppressed to some extent by forming the inflow port 138 in the lower region of the first end wall 136, but it is also effectively suppressed by these perforated plates 155.

Instead of the plurality of perforated plates 155, thin plates having no through holes may be attached at the arrangement positions of these perforated plates 155. In this case, seawater can flow into the region above the placement height of these thin plates through the voids between the adjacent thin plates. Even with a plurality of thin plates, an effect of suppressing the waviness and uplift of the liquid surface can be obtained.

In order to obtain the effect of suppressing the waviness and swelling of the liquid surface, one perforated plate 156 long in the first horizontal direction may be used as the lid member 154 (see FIG. 11). The perforated plate 156 shown in FIG. 11 vertically partitions the internal space of the box body 131 over a section between the inner surface of the first end wall 136 and the inner surface of the second end wall 137. The height position of the perforated plate 156 is equal to the height position of the perforated plate 155 of FIG. Seawater can flow into the space above the perforated plate 156 through the through hole of the perforated plate 156.

A single-layer lid member 154 is arranged in the box body 131 of FIGS. 6 to 11. However, a plurality of layers of lid members 154 may be arranged in the box 131 (see FIGS. 12 to 15). That is, on the upper side of the lid member 154, another lid member 154 is provided at a position separated from the lid member 154. 12 to 21 show two-layer lid members 154 arranged at intervals in the vertical direction. Both of these lid members 154 are provided above the inflow port 138 and below the liquid level of the heating liquid in the box 131.

Both of the two-layer lid member 154 of FIG. 12 partition the internal space of the box body 131 up and down over the entire section between the inner surface of the first end wall 136 and the inner surface of the second end wall 137. These lid members 154 may be configured by using the perforated plate 156 described with reference to FIG.

When an upward flow of the heating liquid occurs below the lower lid member 154, the upward heating liquid collides with the lower lid member 154 and the upper lid member 154 in sequence. As a result, the momentum of the upward heating liquid is more effectively weakened by the two-layer lid member 154 of FIG. 12 than by the single-layer lid member 154 of FIG. Therefore, the uplift of the liquid level of the heating liquid is effectively suppressed. Since the lid member 154 of FIG. 12 is provided over the entire length of the box body 131, waviness and ridge of the liquid surface are suppressed over the entire length of the box body 131.

If a region where the upward flow of the heating liquid is strong is known, the structure of the two-layer lid member 154 may be provided only in that region (see FIGS. 13 to 15). The lower lid member 154 of FIGS. 13 to 15 is the same as the lower lid member 154 of FIG. 12, while the upper lid member 154 of FIGS. 13 to 15 is from the lower lid member 154. Is also short in the longitudinal direction of the box 131.

If it is known that a strong upward flow occurs near the first end wall 136, the upper lid member 154 is arranged near the first end wall 136 (see FIG. 13). If it is known that a strong upward flow occurs at an intermediate position in the longitudinal direction of the box 131, the lid member 154 of the upper box 131 is arranged at an intermediate position of the box 131 (see FIG. 14). .. If it is known that a strong upward flow occurs near the second end wall 137, the upper lid member 154 is placed near the second end wall 137 (see FIG. 15).

The short lid member 154 of FIGS. 13 to 15 is arranged above the long lid member 154. However, the short lid member 154 may be located below the long lid member 154 (see FIGS. 16-18). The short lid member 154 of FIG. 16 is located near the first end wall 136. The short lid member 154 of FIG. 17 is arranged at an intermediate position of the box body 131. The short lid member 154 of FIG. 18 is located near the second end wall 137.

When the short lid member 154 is arranged above the long lid member 154 (FIGS. 13 to 15), the region where the short lid member 154 is present and the region where the short lid member 154 is not present are the heating liquids. Formed near the liquid level of. In this case, the influence of the presence or absence of the short lid member 154 on the flow of the heating liquid tends to appear in the shape of the liquid surface. On the other hand, as shown in FIGS. 16 to 18, when the short lid member 154 is arranged below the long lid member 154, the influence of the presence or absence of the short lid member 154 on the flow of the heating liquid is on the upper side. The long lid member 154 makes it difficult to appear on the liquid surface.

If it is known that the upward flow of the heating liquid becomes stronger at a specific position in the box 131, the long lid member 154 is not always required (see FIGS. 19 to 21). If it is known that the single-layer lid member 154 produces a strong upward flow near the first end wall 136 that cannot sufficiently suppress the uplift of the liquid level, two near the first end wall 136. Short lid members 154 may be stacked vertically spaced apart (see FIG. 19). If it is known that a strong upward flow occurs at the intermediate position of the box 131, two short lid members 154 may be vertically spaced apart at the intermediate position of the box 131 (FIG. 20). See). Two short lid members 154 may be vertically spaced apart near the second end wall 137, provided that a strong upward flow is known to occur near the second end wall 137. See FIG. 21).

In FIGS. 12 to 21, two lid members 154 are shown. However, in the box 131, more than two lid members 154 may be aligned in the vertical direction.

When the lid member 154 is arranged in the box body 131, the lid member 154 may be used for fixing the baffle plate 151 (see FIGS. 22 to 24). The structure of the lid member 154 shown in FIGS. 22 to 24 is the same as the structure of the lid member 154 of FIG.

The baffle plate 151 of FIGS. 22 to 24 is fixed to the lower long lid member 154 in a substantially vertical posture. The upper edge of the baffle plate 151 is connected to the lower surface of the lower long lid member 154. The lower edge of the baffle plate 151 is separated upward from the bottom wall 132 of the box body 131. The space between the lower edge of the baffle plate 151 and the bottom wall 132 is formed to allow the passage of the heating liquid toward the second end wall 137.

The baffle plate 151 of FIG. 22 is fixed to a long lid member 154 on the lower side closer to the first end wall 136 than the second end wall 137. The baffle plate 151 of FIG. 23 is fixed to the lower long lid member 154 near the intermediate position of the box body 131. The baffle plate 151 of FIG. 24 is fixed to a long lid member 154 on the lower side closer to the second end wall 137 than the first end wall 136.

No through hole is formed in the baffle plate 151 of FIGS. 22 to 24. Therefore, the passage of the heating liquid toward the second end wall 137 is allowed in the space between the lower edge of the baffle plate 151 and the bottom wall 132. Since the space is separated from the liquid surface, changes in the flow direction of the heating liquid due to the passage of the space are less likely to appear on the liquid surface.

In order to increase the area that allows the passage of the heating liquid toward the second end wall 137, a baffle plate 151a having a through hole may be used instead of the baffle plate 151 (see FIG. 25). The baffle plate 151a of FIG. 25 is fixed to the lower surface of the lower long lid member 154 at the same position as the baffle plate 151 of FIG. 22.

When the baffle plate 151a is used, the baffle plate 151a may be connected to the bottom wall 132.

When at least one of the plurality of lid members 154 arranged at vertical intervals is shorter than the total length of the box body 131, the flow of the heating liquid flowing horizontally through the space between these lid members 154 flows. The liquid level of the heating liquid may be raised. When this horizontal flow passes through the region where the lid members 154 overlap, the heating liquid flows while spreading up and down. Since these lid members 154 are arranged near the liquid level, the heating liquid that spreads in the vertical direction tends to cause the liquid level to rise.

A vertical lid 157 (see FIGS. 26 to 28) may be provided in order to prevent or suppress the generation of the heating liquid that spreads in the vertical direction. The lid member 154 of FIG. 26 has the same structure as the lid member of FIG. The vertical lid 157 of FIG. 26 is fixed to the end edge of the upper short lid member 154 (the end edge on the second end wall 137 side) and the upper surface of the lower long lid member 154 on the second end wall 137 side. , The gap between these lid members 154 is closed. The lid member 154 of FIG. 27 has the same structure as the lid member 154 of FIG. The vertical lid 157 of FIG. 27 is fixed to both end edges of these lid members 154 (the end edge on the first end wall 136 side and the end edge on the second end wall 137 side), and the gap between these lid members 154. Is closed. The lid member 154 of FIG. 28 has the same structure as the lid member 154 of FIG. The vertical lid 157 of FIG. 28 is fixed to the edge of these lid members 154 (the edge on the side of the first end wall 136) and closes the gap between the lid members 154.

The vertical lid 157 may completely close the gap (the gap opened in the horizontal direction) between the lid members 154, or may partially close the gap. In order for the vertical lid 157 to partially close the gap between the lid members 154, a through hole may be formed in the vertical lid 157 connected to both lid members 154, or a through hole may be formed or penetrated. The upper or lower edge of the vertical lid 157 in which the hole is not formed may be separated from the lower surface or the upper surface of the upper and lower lid members 154. Even when the vertical lid 157 partially closes the gap between the lid members 154, the vertical lid 157 can weaken the horizontal force flowing through the gap of the lid member 154. As a result, the flow that diffuses up and down after passing through the gaps between these lid members 154 is weakened, and the uplift of the liquid surface is suppressed.

The structures described in connection with the embodiments described above are exemplary and should not be construed in a restrictive manner. Various changes and improvements may be made to the structures described in connection with the embodiments described above.

Regarding the above-described embodiment, liquefied natural gas is exemplified as the liquefied gas. However, the liquefied gas may be liquefied petroleum gas or liquid nitrogen.

Regarding the above-described embodiment, seawater is exemplified as a heating liquid. However, another liquid having a temperature higher than that of the liquefied gas may be used as the heating liquid.

Various layouts can be adopted for the height position of the manifold 122. Other layouts of the manifold 122 are described with reference to FIGS. 1 and 29. FIG. 29 is a schematic cross-sectional view of the manifold 122.

Regarding the layout shown in FIG. 1, the inflow port 138 of the first end wall 136 is arranged at a different height position from the outflow port 125 of the manifold 122. However, the inflow port 138 of the first end wall 136 may have a relative positional relationship between the manifold 122 and the plurality of troughs 130 so as to be substantially coaxial with the outflow port 125 of the manifold 122 (FIG. FIG. 29). That is, the manifold 122 may be arranged at a position higher than the position shown in FIG. 1 so that the height position of the manifold 122 is substantially equal to the height position of the plurality of troughs 130. In this case, a straight pipe type supply pipe 123 can be preferably used as the supply pipe connected to these, and a flow path shorter than the curved flow path is formed.

Regarding the above-described embodiment, the inflow amount of seawater between the plurality of troughs 130 is made uniform by using the closing member 140. Flow rate adjusting components such as a valve body and an orifice may be attached to the plurality of supply pipes 123 in order to increase the adjustment range of the amount of seawater flowing into each of the plurality of troughs 130.

Regarding the above-described embodiment, the closing member 140 is formed by using an orifice. However, as shown in FIG. 30, the closing member 140 may be formed by using the perforated plate 142.

Regarding the above-described embodiment, a plurality of baffle plates 151 are used as the ridge suppressing portion. However, a single baffle plate may be used as the ridge suppressor. How many baffles are used as the uplift suppressor may be determined based on the flow rate of seawater flowing into the trough 130 and the size of the inflow port 138. Based on these design conditions, the arrangement interval of the plurality of baffle plates 151 and the heights of the plurality of baffle plates 151 may be determined.

Regarding the above-described embodiment, the baffle plate 151 is fixed in the box body 131 in a substantially vertical posture. However, the vaporizer 100 may have a baffle plate 151'fixed in the box 131 in an inclined position (see FIGS. 31 and 32). The baffle plate 151'shown in FIGS. 31 and 32 is fixed to the bottom wall 132. The baffle plate 151'in FIG. 31 is inclined from the bottom wall 132 toward the upper edge of the baffle plate 151' toward the second end wall 137. On the other hand, the baffle plate 151'in FIG. 32 is inclined from the bottom wall 132 toward the upper edge of the baffle plate 151' toward the first end wall 136 side. The baffle plate 151'may be separated from the bottom wall 132. In this case, the baffle plate 151'is fixed to the

side walls

134 and 135.

When the baffle plate 151'is inclined toward the second end wall 137 (FIG. 31), the heating liquid that collides with the baffle plate 151' tends to flow diagonally upward. Therefore, the amount of the heating liquid that overflows from the box 131 can be increased around the baffle plate 151'.

When the baffle plate 151'is inclined toward the first end wall 136 (FIG. 32), the heating liquid that collides with the baffle plate 151' tends to flow diagonally downward. In this case, the flow velocity of the heating liquid near the bottom wall 132 of the box body 131 tends to increase. As a result, the bias of the velocity distribution of the heating liquid in the depth direction of the box 131 is alleviated. In this case, the waviness of the liquid surface of the heating liquid is suppressed.

The resistance member may have a plurality of baffle plates 151 ″ (resistors) arranged at intervals from each other (see FIG. 33). The plurality of baffle plates 151 ″ of FIG. 33 are installed at three locations in the first horizontal direction. At each of these installation locations, the two baffle plates 151 ″ are arranged at intervals in the vertical direction. A part of the heating liquid that collides with the baffle plates 151 ″ can pass through the space between these baffle plates 151 ″ and flow downstream. The size of the void is adjusted by the distance between the two baffle plates 151'' arranged in the vertical direction. By adjusting these distances, the influence of the baffle plate 151'' on the heating liquid and the baffle plate 151'' The amount of heating liquid flowing beyond'' can be set to an appropriate value.

<Second Embodiment>
FIG. 34 is a schematic perspective view of the open rack type vaporizer 100'of the second embodiment. FIG. 35 is a schematic cross-sectional view of the vaporizer 100'. The vaporizer 100'is described with reference to FIGS. 34 and 35.

The vaporizer 100'of the second embodiment uses two supply pipes 123, 123'that differ in the cross-sectional area of the flow path with respect to the supply paths for supplying the heating liquid from the manifold 122 to the four troughs 130. , It is different from the vaporizer 100 of the first embodiment. The supply pipe 123 is connected to the outermost two troughs 130 out of the four troughs 130 spaced apart from each other in the second horizontal direction. The flow path cross-sectional area of the supply pipe 123'used to supply the heating liquid to the remaining trough 130 is larger than the flow path cross-sectional area of the supply pipe 123.

Each of the two outermost troughs 130 is adjacent to one heat transfer panel 113. On the other hand, each of the remaining two troughs 130 is adjacent to the two heat transfer panels 113. Therefore, each of the two outermost troughs 130 need only supply the heating liquid to one heat transfer panel 113, whereas each of the remaining two troughs 130 is for heating to the two heat transfer panels 113. It is necessary to supply the liquid. Therefore, it is necessary that more heating liquid flows out from the remaining two troughs 130 than the amount of the heating liquid flowing out from the outermost two troughs 130. Therefore, it is necessary to supply more heating liquid to the remaining two troughs 130 than the amount of the heating liquid supplied to the outermost two troughs 130.

In the present embodiment, since the flow path cross-sectional area of the supply pipe 123'is larger than the flow path cross-sectional area of the supply pipe 123, more heating liquid is supplied than the supply amount of the heating liquid to the outermost two troughs 130. It becomes possible to supply to the remaining two troughs 130. In order to obtain such a magnitude relationship of the flow rate, it is not necessary to attach a fluid device (for example, a flow rate adjusting valve or an orifice) for adjusting the flow rate to the supply pipes 123, 123'.

The vaporizer described in connection with the various embodiments described above mainly has the following features.

The vaporizer according to one aspect of the above-described embodiment is configured to vaporize the liquefied gas under heat exchange between the liquefied gas and the heating liquid having a temperature higher than that of the liquefied gas. The vaporizer supplies the heating liquid to the heat transfer panel configured so that a plurality of heat transfer tubes erected so as to guide the liquefied gas are arranged in the horizontal direction and the outer surface of the plurality of heat transfer tubes. The truffles are arranged at a position lower than the upper edge of the heat transfer panel, and the truffles are arranged on one end side of the truffles in the alignment direction of the plurality of heat transfer tubes. It is provided with a manifold configured to supply the heating liquid to the heat pipe. The trough is aligned with a bottom wall extending in the alignment direction of the plurality of heat transfer tubes and a first end wall erected at an end of the bottom wall located on the manifold side in the alignment direction. It includes a second end wall erected at another end of the bottom wall that is distant from the first end wall in the direction. An inflow port into which the heating liquid flows is formed on the first end wall.

According to the above configuration, the manifold configured to supply the heating liquid to the trough is arranged on the first end wall side of the trough, and the inflow port is formed on the first end wall. The flow path of the heating liquid from the manifold to the trough is shortened. In other words, the flow path of the heating liquid from the manifold to the trough is different from the structure in which the heating liquid flows into the trough having an inflow port formed in the bottom wall from the manifold, and the flow path of the heating liquid is over the first end wall of the bottom wall. It does not have to extend to the inlet.

With respect to the above configuration, the vaporizer is configured to suppress the uplift of the liquid level of the heating liquid caused by the collision of the heating liquid flowing into the trough with the second end wall. It may further include a raised restraint portion.

According to the above configuration, the heating liquid that has flowed into the trough through the inflow port flows toward the second end wall and collides with the second end wall. A part of the heating liquid that collides with the second end wall flows upward near the second end wall and tries to raise the liquid level of the heating liquid upward. At this time, since the uplift suppressing portion suppresses the uplift of the liquid surface, excessive supply of the heating liquid to the outer surface of the heat transfer tube near the second end wall is prevented. Therefore, the variation in the amount of heat exchange between the plurality of heat transfer tubes is suppressed.

With respect to the above configuration, the ridge restraining portion includes a lid member extending in the alignment direction between the first end wall and the second end wall at a position higher than the inflow port in the trough. You may be.

According to the above configuration, most of the heating liquid flowing into the trough from the inflow port flows in the region below the lid member arranged at a position higher than the inflow port. When the heating liquid subsequently collides with the second end wall, an upward flow of the heating liquid occurs. The uplift of the liquid level of the heating liquid is suppressed by the upward flow of the heating liquid colliding with the lid member.

With respect to the above configuration, the lid member may be arranged on the first end wall side, the second end wall side, or at an intermediate position between the first end wall and the second end wall. ..

According to the above configuration, when the lid member is arranged on the first end wall side, the uplift of the heating liquid is suppressed near the inflow port. When the lid member is arranged on the second end wall side, the uplift of the liquid level of the heating liquid caused by the collision of the heating liquid with the second end wall is suppressed. When the lid member is arranged at an intermediate position between the first end wall and the second end wall, the uplift of the liquid level of the heating liquid at the intermediate position is suppressed.

With respect to the above configuration, the lid member is a plate member that is entirely arranged in the alignment direction from the first end wall to the second end wall, or in a section from the first end wall to the second end wall. It may be composed of a plurality of plate members arranged at intervals in the alignment direction.

According to the above configuration, when the lid member is composed of plate members arranged entirely in the alignment direction from the first end wall to the second end wall, the waviness or ridge of the liquid level of the heating liquid is caused by the trough. It is suppressed over the entire length. When the lid member is composed of a plurality of plate members arranged at intervals in the alignment direction in the section from the first end wall to the second end wall, the uplift of the liquid level of the heating liquid is a trough. It is suppressed over a wide range in the longitudinal direction of the trough without excessive weight gain.

Regarding the above configuration, the lid member may be formed with a through hole that penetrates the lid member in the vertical direction.

According to the above configuration, a part of the heating liquid flowing upward can flow into the space above the lid member through the through hole of the lid member. As the heating liquid passes through the through hole, resistance is applied to the heating liquid, so that the uplift of the liquid level near the second end wall is suppressed.

With respect to the above configuration, the ridge suppressing portion may include a resistance member arranged between the first end wall and the second end wall. By colliding with the resistance member before the heating liquid flowing into the trough from the inflow port collides with the second end wall, the collision force of the heating liquid with respect to the second end wall is suppressed. You may.

According to the above configuration, the heating liquid flowing in from the inflow port collides with the resistance member before colliding with the second end wall, and is therefore decelerated by the resistance member before colliding with the second end wall. Therefore, even if the heating liquid collides with the second end wall, a large collision force is not generated, and the flow of the heating liquid having a large velocity component is less likely to occur upward. That is, the uplift of the liquid level near the second end wall is suppressed.

Regarding the above configuration, the resistance member may be installed in a posture perpendicular to or inclined with respect to the bottom wall of the trough.

According to the above configuration, when the resistance member is installed in a posture perpendicular to the bottom wall of the trough, the force of the heating liquid is effectively reduced by the collision of the heating liquid with the resistance member. To. When the resistance member is installed in an inclined posture with respect to the bottom wall of the trough, it is possible to weaken the momentum of the heating liquid and change the flow direction of the heating liquid.

Regarding the above configuration, the resistance member may be installed away from the bottom wall of the trough.

In the above configuration, a part of the heating liquid can flow downstream through the gap between the resistance member and the bottom wall of the trough. Since this void is separated from the liquid level of the heating liquid, the liquid level does not rise significantly due to the flow of the heating liquid passing through the void. Since the heating liquid can flow through the voids to the second end wall, there is no excessive decrease in the outflow amount of the heating liquid near the second end wall.

Regarding the above configuration, the resistance member may be composed of a plurality of resistors arranged apart from each other.

According to the above configuration, since the resistance member is composed of a plurality of resistors arranged apart from each other, it is possible to set a plurality of regions in the trough where the heating liquid collides with the resistance member. .. The smaller the spacing between these resistors, the greater the resistance to the heating liquid. On the other hand, the greater the spacing between these resistors, the smaller the resistance to the heating liquid. Therefore, by adjusting the spacing between these resistors, the resistance to the heating liquid can be set to an appropriate value.

Regarding the above configuration, the resistance member may be formed with a through hole penetrating the resistance member in the alignment direction.

According to the above configuration, since the through holes penetrating the resistance member are formed in the alignment direction of the plurality of heat transfer tubes, a part of the heating liquid flowing in from the inflow port formed in the first end wall is formed. It can flow from the upstream region to the downstream region of the resistance member through the through hole of the resistance member. As the heating liquid passes through the through hole, a large resistance is applied to the heating liquid, so that the pressure of the heating liquid from the first end wall to the second end wall decreases. As a result, the uplift of the liquid level near the second end wall is suppressed.

With respect to the above configuration, the vaporizer may further include a closing member arranged in the trough so as to partially close the inflow port. The closing member may be removable from the trough.

According to the above configuration, since the closing member partially closes the inflow port, it is possible to give resistance to the heating liquid at the inflow port of the trough and adjust the inflow amount of the heating liquid into the trough. Since the closing member is removable from the trough, the resistance to the heating liquid passing through the inflow port can be reduced by removing the closing member from the trough.

With respect to the above configuration, the vaporizer has a plurality of heat transfer tubes, another heat transfer panel arranged apart from the heat transfer panel, and the plurality of heat transfer tubes of the other heat transfer panel. The other trough configured to supply the heating liquid to the outer surface, and the trough and the other trough to supply the heating liquid from the manifold to the trough and the other trough, respectively. It may further include a plurality of connected supply pipes. One of the heat transfer panel and the other heat transfer panel may be configured to exchange heat between the heating liquid and the liquefied gas at a flow rate smaller than that of the other heat transfer panel. The flow path cross-sectional area of the supply pipe connected to the trough corresponding to the one heat transfer panel may be smaller than the flow path cross-sectional area of the supply pipe connected to the trough corresponding to the other heat transfer panel. ..

According to the above configuration, the trough receives the heating liquid through a plurality of supply pipes connected to the manifold, so that the amount of the heating liquid supplied to the trough depends on the flow path cross-sectional area of these supply pipes. change. Since the flow path cross-sectional area of the supply pipe connected to the trough that supplies the heating liquid to the heat transfer panel, which requires a relatively small flow rate of the heating liquid for heat exchange between the heating liquid and the liquefied gas, is relatively small. , Unnecessarily much heating liquid is not supplied to the trough.

With respect to the above configuration, the vaporizer comprises at least two heat transfer panels including the heat transfer panel and spaced apart from each other, three troughs including the trough, and the heating liquid in the three troughs. A plurality of supply pipes connected to the three troughs so as to be supplied from the manifold may be further provided. Two of the three troughs are respectively located outside the row of the at least two heat transfer panels so that they are adjacent to only one of the at least two heat transfer panels, while the remaining troughs. May be located between adjacent heat transfer panels. The flow path cross-sectional area of the pair of supply pipes connected to the two troughs may be smaller than the flow path cross-sectional area of the supply pipes connected to the remaining troughs.

According to the above configuration, one heat transfer panel is adjacent to the two outer troughs, while two heat transfer panels are adjacent to the remaining troughs. Therefore, from the two outer troughs, the heating liquid flows down to one heat transfer panel, while from the remaining troughs, the heating liquid flows down to the two heat transfer panels. On the other hand, since the flow path cross-sectional area of the supply pipe connected to the two outer troughs is smaller than the flow path cross-sectional area of the supply pipes for the remaining troughs, the heating liquid is supplied to the two outer troughs. The amount is relatively small. Since the trough receives the heating liquid through a plurality of supply pipes connected to the manifold, the amount of the heating liquid supplied to the trough varies depending on the flow path cross-sectional area of these supply pipes. Therefore, a flow rate corresponding to the number of heat transfer panels to which the heating liquid is supplied can be obtained. Therefore, it is not necessary to attach a fluid device (for example, a valve body) for reducing the supply amount of the heating liquid to the two outer trough supply pipes.

Regarding the above configuration, the vaporizer may further include another lid member arranged at a position vertically separated from the lid member.

According to the above configuration, even if the upward flow of the heating liquid is strong, the upward flow force is weakened by the upward collision of the heating liquid with the lid member and other lid members in sequence. Therefore, the uplift of the liquid level of the heating liquid is suppressed.

Regarding the above configuration, at least one of the lid member and the other lid member may be entirely arranged in the trough.

According to the above configuration, waviness and uplift of the liquid level of the heating liquid are suppressed over the entire length of the trough.

With respect to the above configuration, the vaporizer may further include a vertical lid arranged in a gap between the lid member and the other lid member.

According to the above configuration, a part of the heating liquid that collides with the upper lid member among the lid member and other lid members flows along the gap between these lid members. Since a vertical lid is arranged between these lid members, the heating liquid flowing along the gap between these lid members receives resistance from the vertical lid, and the force of the heating liquid weakens.

With respect to the above configuration, the ridge suppressing portion may include a resistance member arranged between the first end wall and the second end wall. The resistance member may be in contact with the lower surface of the lid member. Before the heating liquid flowing into the trough from the inflow port collides with the second end wall, the collision force of the heating liquid with respect to the second end wall is suppressed by colliding with the resistance member. May be done. The resistance member may be formed with a through hole penetrating the resistance member in the alignment direction.

According to the above configuration, since the resistance member is in contact with the lower surface of the lid member, the resistance member can be attached to the lid member. Since a through hole is formed in the resistance member, the heating liquid can flow toward the second end wall through the through hole. Therefore, there is no excessive decrease in the liquid level of the heating liquid near the second end wall.

The techniques described in connection with the above embodiments are suitably used in various technical fields where a phase change from a liquefied gas to a vaporized gas is required.

Claims

A vaporizer that vaporizes the liquefied gas under heat exchange between the liquefied gas and a heating liquid having a temperature higher than that of the liquefied gas.
A heat transfer panel configured so that a plurality of heat transfer tubes erected to guide the liquefied gas are lined up in the horizontal direction.
A trough configured to supply the heating liquid to the outer surfaces of the plurality of heat transfer tubes and arranged at a position lower than the upper edge of the heat transfer panel.
A manifold that is arranged on one end side of the trough in the alignment direction of the plurality of heat transfer tubes and is configured to supply the heating liquid to the trough is provided.
The trough includes a bottom wall extending in the alignment direction of the plurality of heat transfer tubes, a first end wall erected at an end of the bottom wall located on the manifold side in the alignment direction, and the alignment direction. Including a second end wall erected at another end of the bottom wall that is separated from the first end wall.
A vaporizer in which an inflow port into which the heating liquid flows is formed on the first end wall.
Further, a ridge suppressing portion configured to suppress the bulge of the liquid surface of the heating liquid caused by the collision of the heating liquid flowing into the trough with the second end wall is provided. The vaporizer according to claim 1.
2. The ridge suppressing portion includes a lid member extending in the alignment direction between the first end wall and the second end wall at a position higher than the inflow port in the trough. The vaporizer described in.
The vaporization according to claim 3, wherein the lid member is arranged on the first end wall side, the second end wall side, or an intermediate position between the first end wall and the second end wall. apparatus.
The lid member is a plate member that is entirely arranged in the alignment direction from the first end wall to the second end wall, or is spaced in the alignment direction in a section from the first end wall to the second end wall. The vaporizer according to claim 3, which is composed of a plurality of plate members arranged apart from each other.
The vaporizer according to any one of claims 3 to 5, wherein the lid member is formed with a through hole penetrating the lid member in the vertical direction.
The ridge suppressing portion includes a resistance member arranged between the first end wall and the second end wall.
By colliding with the resistance member before the heating liquid flowing into the trough from the inflow port collides with the second end wall, the collision force of the heating liquid with respect to the second end wall is suppressed. The vaporizer according to claim 2.
The vaporizer according to claim 7, wherein the resistance member is installed in a posture perpendicular to or inclined with respect to the bottom wall of the trough.
The vaporizer according to claim 7, wherein the resistance member is installed apart from the bottom wall of the trough.
The vaporizer according to claim 7, wherein the resistance member is composed of a plurality of resistors arranged apart from each other.
The vaporizer according to any one of claims 7 to 10, wherein the resistance member is formed with a through hole penetrating the resistance member in the alignment direction.
Further provided with a closing member arranged in the trough so as to partially close the inflow port.
The vaporizer according to any one of claims 1 to 5, 7 to 10, wherein the closing member is removable from the trough.
With other heat transfer panels that have a plurality of heat transfer tubes and are arranged apart from the heat transfer panel.
With other troughs configured to supply the heating liquid to the outer surfaces of the plurality of heat transfer tubes of the other heat transfer panel.
A plurality of supply pipes connected to the trough and the other troughs are further provided so as to supply the heating liquid to the trough and the other troughs from the manifold.
One of the heat transfer panel and the other heat transfer panel is configured to exchange heat between the heating liquid and the liquefied gas at a flow rate smaller than that of the other heat transfer panel.
The flow path cross-sectional area of the supply pipe connected to the trough corresponding to the one heat transfer panel is smaller than the flow path cross-sectional area of the supply pipe connected to the trough corresponding to the other heat transfer panel. 5. The vaporizer according to any one of 5, 7 to 10.
At least two heat transfer panels including the heat transfer panel and spaced apart from each other.
Three troughs including the trough and
The three troughs are further provided with a plurality of supply pipes connected to the three troughs so as to supply the heating liquid from the manifold.
Two of the three troughs are respectively located outside the row of the at least two heat transfer panels so that they are adjacent to only one of the at least two heat transfer panels, while the remaining troughs. Is placed between adjacent heat transfer panels,
Any one of claims 1 to 5, 7 to 10, wherein the flow path cross-sectional area of the pair of supply pipes connected to the two troughs is smaller than the flow path cross-sectional area of the supply pipes connected to the remaining troughs. The vaporizer according to item 1.
The vaporizer according to any one of claims 3 to 5, further comprising another lid member arranged at a position vertically separated from the lid member.
The vaporizer according to claim 15, wherein at least one of the lid member and the other lid member is entirely arranged in the trough.
The vaporizer according to claim 15, further comprising a vertical lid arranged in a gap between the lid member and the other lid member.
The ridge suppressing portion includes a resistance member arranged between the first end wall and the second end wall.
The resistance member comes into contact with the lower surface of the lid member and
The heating liquid that has flowed into the trough from the inflow port collides with the resistance member before colliding with the second end wall, so that the collision force of the heating liquid with respect to the second end wall is suppressed. Being done
The vaporizer according to claim 15, wherein the resistance member is formed with a through hole penetrating the resistance member in the alignment direction.