CN111795588A

CN111795588A - Gasification device and maintenance method for gasification device

Info

Publication number: CN111795588A
Application number: CN202010259782.6A
Authority: CN
Inventors: 鹤庆彦; 河田一也
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 2019-04-05
Filing date: 2020-04-03
Publication date: 2020-10-20
Also published as: JP2020169783A

Abstract

The purpose of the present invention is to provide a technique that enables easy maintenance and an increase in the amount of liquefied gas vaporized per unit installation area. The application discloses a gasification device for gasifying liquefied gas. The gasification device is provided with: 1 st distribution manifold; a plurality of 1 st heat transfer panels each having a heat transfer pipe connected to the 1 st distribution manifold and into which liquefied gas supplied through the 1 st distribution manifold flows; a 2 nd distribution manifold; a plurality of 2 nd heat transfer panels each having a heat transfer pipe connected to the 2 nd distribution manifold and into which liquefied gas supplied through the 2 nd distribution manifold flows; and a liquid supply unit for making the heating liquid flow down to the outer peripheral surface of the heat transfer pipe to gasify the liquefied gas in the heat transfer pipe. The plurality of 2 nd heat transfer panels are disposed adjacent to one of the plurality of 1 st heat transfer panels, respectively.

Description

Gasification device and maintenance method for gasification device

Technical Field

The present invention relates to a gasification apparatus used for gasifying liquefied gas and a maintenance method for maintaining the gasification apparatus.

Background

Various kinds of gasification apparatuses have been developed which are used for gasifying low-temperature liquefied gas. As 1 of the known gasification apparatuses, an open rack (open rack) type structure is known (see patent document 1). The open rack type vaporizer is provided with: a plurality of heat transfer panels each having a heat transfer pipe into which liquefied gas flows; and a liquid supply unit that supplies a heating liquid having a higher temperature than the liquefied gas to the outer surface of the heat transfer tubes of the heat transfer panels. The plurality of heat transfer panels are arranged in an upright posture at intervals in a predetermined horizontal direction. The heating liquid supplied from the liquid supply portion flows down along the outer surfaces of the heat transfer tubes of the heat transfer panels. During this period, the liquefied gas flowing in the heat transfer tube exchanges heat with the heating liquid on the outer surface of the heat transfer tube. As a result of the heat exchange with the heating liquid, the liquefied gas is vaporized.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017 and 150784.

Disclosure of Invention

Problems to be solved by the invention

When performing maintenance work on a plurality of heat transfer panels, an operator enters a space between the heat transfer panels, inspects the heat transfer panels, and performs necessary repair work. If these heat transfer panels are arranged densely, a large space for an operator to enter and easily perform maintenance work cannot be obtained. On the other hand, if a large amount of gasification is required per unit installation area (= total amount of gasified gas generated by gasification device/installation area of gasification device), the interval between adjacent heat transfer panels needs to be set to a small value. Therefore, if a large amount of vaporization per unit installation area is desired, the maintenance work becomes difficult.

The purpose of the present invention is to provide a technique that enables easy maintenance and an increase in the amount of liquefied gas vaporized per unit installation area.

Means for solving the problems

A gasification apparatus according to an aspect of the present invention is configured to gasify liquefied gas. The gasification device is provided with: 1 st distribution manifold; a plurality of 1 st heat transfer panels each having a heat transfer pipe connected to the 1 st distribution manifold and into which the liquefied gas supplied through the 1 st distribution manifold flows; a 2 nd distribution manifold; a plurality of 2 nd heat transfer panels each having a heat transfer pipe connected to the 2 nd distribution manifold and into which the liquefied gas supplied through the 2 nd distribution manifold flows; and a liquid supply unit for making the heating liquid flow down to the outer peripheral surface of the heat transfer pipe to vaporize the liquefied gas in the heat transfer pipe; the plurality of 2 nd heat transfer panels are disposed adjacent to one of the plurality of 1 st heat transfer panels, respectively.

According to the above configuration, the gasification apparatus can obtain a large gasification amount per unit installation area as follows. Since the liquefied gas flows into the 1 st heat transfer panel and the 2 nd heat transfer panel and the heating liquid is supplied to the outer surface of the heat transfer pipe, the liquefied gas is vaporized in these heat transfer panels. If the interval between the 1 st heat transfer panel and the 2 nd heat transfer panel adjacent to the 1 st heat transfer panel is set to a small value, these portions where the liquefied gas is vaporized are arranged relatively densely. Therefore, if the 1 st heat transfer panel and the 2 nd heat transfer panel are arranged densely, a large amount of vaporization per unit installation area can be obtained.

On the other hand, if the 1 st heat transfer panel and the 2 nd heat transfer panel are arranged densely, a large space is not available for an operator to enter between the heat transfer panels and perform maintenance work. However, if the 2 nd heat transfer panel is displaced upward independently of the 1 st heat transfer panel, a space is formed below the 2 nd heat transfer panel, and the lower portion of the 1 st heat transfer panel can be exposed in the space. Since this space is a space in which the 2 nd heat transfer panel is disposed, it is sufficiently large for performing maintenance work. The operator can enter the space below the 2 nd heat transfer panel to inspect or repair the 1 st heat transfer panel as necessary. As described below, the upward displacement of the 2 nd heat transfer panel independent from the 1 st heat transfer panel is allowed.

The 2 nd heat transfer panel is not connected to the 1 st distribution manifold to which the plurality of 1 st heat transfer panels are connected, but is connected to the 2 nd distribution manifold. Therefore, even if the plurality of 2 nd heat transfer panels and the 2 nd distribution manifold are integrally displaced upward, the plurality of 1 st heat transfer panels and the 1 st distribution manifold do not follow the upward displacement of the plurality of 2 nd heat transfer panels and the 2 nd distribution manifold.

In the above configuration, the 1 st distribution manifold and the 2 nd distribution manifold may be located on opposite sides of the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels.

According to the above configuration, the 2 nd distribution manifold can be displaced upward without contacting not only the plurality of 1 st heat transfer panels but also the 1 st distribution manifold. That is, the 2 nd distribution manifold and the plurality of 2 nd heat transfer panels can be displaced upward without contacting the 1 st distribution manifold and the plurality of 1 st heat transfer panels. Similarly, the 1 st distribution manifold and the 1 st heat transfer panels can be displaced upward without contacting the 2 nd distribution manifold and the 2 nd heat transfer panels.

In the above configuration, the liquid supply portion may be disposed at a position higher than the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels.

According to the above configuration, since the liquid supply portion is disposed at a position higher than the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels, the liquid supply portion does not contact the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels even if the plurality of heat transfer panels are arranged densely. Since the liquid supply portion supplies the heating liquid from a position higher than the heat transfer panels, the heating liquid can flow down on the outer surfaces of the heat transfer tubes of the heat transfer panels. As a result, the liquefied gas flowing into the heat transfer pipe can be vaporized by heat exchange with the heating liquid.

In the above configuration, the vaporizer may further include a guide portion that guides the heating liquid flowing down from the liquid supply portion toward the heat transfer pipe.

According to the above configuration, when the heating liquid dropped from the liquid supply portion drops into the space between the 1 st heat transfer panel and the 2 nd heat transfer panel, the guide portion guides the heating liquid to the heat transfer pipe. As a result, the heating liquid dropped from the liquid supply portion is used for heat exchange with the liquefied gas with little waste.

In the above configuration, the vaporizer may further include a holder configured to hold the 1 st distribution manifold, the plurality of 1 st heat transfer panels, the plurality of 2 nd heat transfer panels, and the liquid supply unit. The holding member may be configured to be capable of releasing the connection with the 1 st distribution manifold and the 1 st heat transfer panels, and configured to be capable of releasing the connection with the 2 nd distribution manifold and the 2 nd heat transfer panels.

According to the above configuration, if the 1 st distribution manifold and the 1 st heat transfer panels are separated from the holder, the 2 nd distribution manifold and the 2 nd heat transfer panels can be independently displaced upward from the 1 st distribution manifold and the 1 st heat transfer panels. The liquid supply portion is held by the holding body, and therefore can be displaced upward following the 2 nd distribution manifold and the plurality of 2 nd heat transfer panels.

A maintenance method according to another aspect of the present invention is used for maintaining the gasification apparatus. The maintenance method includes: and (3) in a state where the 2 nd distribution manifold and the plurality of 2 nd heat transfer panels are connected to each other, displacing the 2 nd distribution manifold, the plurality of 2 nd heat transfer panels, and the liquid supply portion upward, and performing maintenance on the plurality of 1 st heat transfer panels.

According to the above configuration, if the 1 st heat transfer panel and the 2 nd heat transfer panel are arranged densely, a large space sufficient for maintenance work cannot be obtained in a state where the height positions thereof are maintained. However, since the 2 nd heat transfer panel is displaced upward during maintenance work, a large space for maintenance work is formed below the 2 nd heat transfer panel. At this time, since the 1 st heat transfer panel does not follow the upward displacement of the 2 nd heat transfer panel, the lower portion of the 1 st heat transfer panel is exposed to the space below the 2 nd heat transfer panel. The operator can enter the space below the 2 nd heat transfer panel to inspect or perform necessary repair for the exposed portion of the 1 st heat transfer panel.

With the above configuration, the maintenance method may further include: connecting a lifting device to the holding body; separating the holding body from the 1 st distribution manifold and the 1 st heat transfer panels; and moving the holding body upward by using the lifting device, and moving the 2 nd distribution manifold, the plurality of 2 nd heat transfer panels, and the liquid supply portion upward.

According to the above configuration, since the 1 st distribution manifold and the plurality of 1 st heat transfer panels are separated from the holder during the maintenance operation, the 1 st heat transfer panels do not follow the displacement upward of the holder. Unlike the 1 st distribution manifold and the 1 st heat transfer panels, the 2 nd distribution manifold, the 2 nd heat transfer panels, and the liquid supply portion are connected to the holding body. Thus, they are lifted together with the holding body.

In the above configuration, the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels may be held by the holder at positions spaced upward from an installation surface on which the vaporizing device is installed. The maintenance method further includes: disposing a support table below the plurality of 1 st heat transfer panels before separating the holder from the 1 st distribution manifold and the plurality of 1 st heat transfer panels; fixing the height position of the holding body after the holding body moves upwards; connecting the 1 st heat transfer panels to the holder with the height fixed; and removing the support table.

According to the above configuration, the support table is disposed below the plurality of 1 st heat transfer panels before the 1 st distribution manifold and the plurality of 1 st heat transfer panels are separated from the holder, and therefore the 1 st heat transfer panels are supported by the support table. Thus, the height position of these 1 st heat transfer panels is maintained.

Since these 1 st heat transfer panels are connected to the displaced holder, the height positions of the 1 st heat transfer panels are maintained even if the support base is removed. As a result of the removal of the support base, a large space for maintenance is formed below the 2 nd heat transfer panel, and the lower portion of the 1 st heat transfer panel adjacent to the 2 nd heat transfer panel is exposed in the space for maintenance.

Effects of the invention

The above-described technology can realize easy maintenance work and an increase in the amount of liquefied gas vaporized per unit installation area.

Drawings

Fig. 1A is a schematic plan view of an exemplary vaporizer.

Fig. 1B is a schematic bottom view of the vaporizer.

Fig. 2A is a schematic longitudinal sectional view of the vaporizer.

Fig. 2B is a schematic longitudinal sectional view of the vaporizer.

Fig. 3 is a schematic front view of 1 of the plurality of heat transfer panels of the gasification apparatus.

Fig. 4 is a schematic longitudinal sectional view of the vaporizer.

Fig. 5A is a schematic vertical sectional view of the vaporizer during maintenance work.

Fig. 5B is a schematic vertical sectional view of the 1 st panel unit and the 2 nd panel unit of the vaporizer during maintenance work.

Fig. 6 is a schematic longitudinal sectional view of a vaporizer in which a plurality of grooves are incorporated as seawater supply sources.

Fig. 7 is a schematic vertical cross-sectional view of a vaporizer using a plate-like member having a flat upper surface as a guide.

Fig. 8 is a schematic plan view of a vaporizer having an alternative layout of a plurality of heat transfer panels.

Fig. 9 is a schematic longitudinal sectional view of a vaporizer having an alternative layout of a manifold.

Detailed Description

Fig. 1A is a schematic plan view of a part of an exemplary gasification apparatus 100. Fig. 1B is a schematic bottom view of a part of the vaporizer 100. Fig. 2A and 2B are schematic vertical sectional views of a part of the vaporizer 100. The gasification apparatus 100 is explained with reference to fig. 1A to 2B.

The vaporizer 100 is configured to vaporize liquefied gas (hereinafter referred to as "liquefied gas") by exchanging heat between liquefied natural gas and a heating liquid having a higher temperature than the liquefied gas. The gas phase of the natural gas obtained as a result of the heat exchange is referred to as "gasification gas" in the following description. Seawater is used as the heating liquid.

As shown in fig. 1A and 1B, the gasification apparatus 100 includes a plurality of 1 st heat transfer panels 111 and a plurality of 2 nd heat transfer panels 121 that perform heat exchange between liquefied gas and gasified gas. The vaporizer 100 further includes a 1 st distribution manifold 102 and a 1 st recovery manifold 104 (see fig. 2A) provided corresponding to the plurality of 1 st heat transfer panels 111. The 1 st distribution manifold 102 is disposed to distribute the liquefied gas to the plurality of 1 st heat transfer panels 111. The 1 st recovery manifold 104 is a portion into which the vaporized gas obtained in the 1 st heat transfer panel 111 flows. The vaporizer 100 further includes a 2 nd distribution manifold 103 and a 2 nd recovery manifold 105 (see fig. 2B) provided corresponding to the plurality of 2 nd heat transfer panels 121. The 2 nd distribution manifold 103 is disposed to distribute the liquefied gas to the plurality of 2 nd heat transfer panels 121. The 2 nd recovery manifold 105 is a portion into which the vaporized gas obtained in the 2 nd heat transfer panel 121 flows.

The 1 st heat transfer panels 111, the 1 st distribution manifold 102, and the 1 st recovery manifold 104 are integrated. These integrated structures will be referred to as "1 st panel unit 110" in the following description. Fig. 2A shows a schematic longitudinal section of the 1 st panel unit 110.

The plurality of 2 nd heat transfer panels 121, the 2 nd distribution manifold 103, and the 2 nd recovery manifold 105 are integrated. These integrated structures will be referred to as "2 nd panel unit 120" in the following description. Fig. 2B shows a schematic longitudinal section of the 2 nd panel unit 120.

The 1 st panel unit 110 and the 2 nd panel unit 120 are arranged such that the 1 st heat transfer panels 111 and the 2 nd heat transfer panels 121 are alternately arranged at intervals in the horizontal direction. The plurality of 1 st heat transfer panels 111 and the plurality of 2 nd heat transfer panels 121 are arranged at substantially equal height positions and are arranged in a horizontal direction in an upright posture. That is, each of the plurality of 2 nd heat transfer panels 121 is adjacent to one of the plurality of 1 st heat transfer panels 111. The arrangement interval of the plurality of 1 st heat transfer panels 111 and the arrangement interval of the plurality of 2 nd heat transfer panels 121 are set in consideration of maintenance work. For example, these arrangement intervals may also be set to about 600 mm.

The direction in which the plurality of 1 st heat transfer panels 111 and the plurality of 2 nd heat transfer panels 121 are arranged is referred to as an "arrangement direction" in the following description. The direction indexes of "front" and "rear" are used below for the arrangement direction of the 1 st heat transfer panels 111 and the 2 nd heat transfer panels 121. For the orthogonal direction orthogonal to the arrangement direction, direction indexes such as "left" and "right" are used below. These directional indicators are for clarity of description only and should not be construed as limiting.

The 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 are substantially the same in structure. The 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 are collectively referred to as "heat transfer panels 101" in the following description. The configuration of the heat transfer panel 101 is explained below with reference to fig. 3. Fig. 3 is a schematic front view of the heat transfer panel 101.

The heat transfer panel 101 is configured such that liquefied gas is caused to flow into the heat transfer panel 101 from the lower end of a portion where a vertical section mainly performing heat exchange is formed, and that vaporized gas generated as a result of heat exchange in the vertical section is caused to flow into the upper portion of the heat transfer panel 101. The heat transfer panel 101 includes a plurality of heat transfer pipes 106 arranged in an upright posture in the orthogonal direction as a portion where a vertical section for performing heat exchange is formed. The heat transfer panel 101 includes, as a portion for distributing the liquefied gas to these heat transfer tubes 106, a lower header 107 extending in the orthogonal direction to form a lower edge of the heat transfer panel 101. The lower ends of the plurality of heat transfer tubes 106 are connected to the outer peripheral surface of the lower header 107. The heat transfer panel 101 includes, as a portion into which the gasification gas flows, an upper header 108 extending substantially parallel to the lower header 107 at a position spaced above the lower header 107 to form an upper edge of the heat transfer panel 101. The upper ends of the plurality of heat transfer tubes 106 are connected to the outer peripheral surface of the upper header 108.

The plurality of heat transfer pipes 106 are arranged in the orthogonal direction in an upright posture as described above, and have a substantially vertical surface (hereinafter referred to as "lead straight surface 109") so that seawater flows down. The plurality of heat transfer panels 101 are disposed such that vertical surfaces 109 face in the front-rear direction.

The heat transfer pipes 106 of the 1 st heat transfer panel 111 are referred to as "1 st heat transfer pipes 116" in the following description. The lower header 107 of the 1 st heat transfer panel 111 is referred to as a "1 st lower header 117" in the following description. The upper header 108 of the 1 st heat transfer panel 111 will be referred to as a "1 st upper header 118" in the following description.

The heat transfer pipes 106 of the 2 nd heat transfer panel 121 are referred to as "2 nd heat transfer pipes 126" in the following description. The lower header 107 of the 2 nd heat transfer panel 121 is referred to as a "2 nd lower header 127" in the following description. The upper header 108 of the 2 nd heat transfer panel 121 is referred to as a "2 nd upper header 128" in the following description.

The 1 st distribution manifold 102, the 2 nd distribution manifold 103, the 1 st recovery manifold 104, and the 2 nd recovery manifold 105 extend in the arrangement direction of the plurality of heat transfer panels 101. The 1 st distribution manifold 102 and the 1 st recovery manifold 104 are disposed on the right side of the row of the plurality of heat transfer panels 101, while the 2 nd distribution manifold 103 and the 2 nd recovery manifold 105 are disposed on the left side of the row of the plurality of heat transfer panels 101. That is, the row of the plurality of heat transfer panels 101 is located between the group of the 1 st distribution manifold 102 and the 1 st recovery manifold 104 and the group of the 2 nd distribution manifold 103 and the 2 nd recovery manifold 105.

The 1 st distribution manifold 102 is connected to a pump (not shown) for supplying liquefied gas. The right ends of a plurality of 1 st lower headers 117 are connected to the outer peripheral surface of the 1 st distribution manifold 102 at intervals. On the other hand, the 2 nd panel unit 120 is not connected to the 1 st distribution manifold 102.

The 1 st recovery manifold 104 is connected to a supply device (not shown) configured to supply vaporized gas to a predetermined destination (not shown). The 1 st recovery manifold 104 is disposed substantially directly above the 1 st distribution manifold 102. The right ends of a plurality of 1 st upper headers 118 are connected to the outer peripheral surface of the 1 st recovery manifold 104 at intervals. On the other hand, the 2 nd panel unit 120 is not connected to the 1 st recovery manifold 104.

Since the 1 st heat transfer panels 111 are installed in the vaporizing device 100 in a substantially vertical posture, the 1 st upper headers 118 are positioned substantially directly above the connection points of the 1 st recovery manifold 104 to the 1 st distribution manifold 102. Thus, the spacing of the connection points on the 1 st recovery manifold 104 substantially coincides with the spacing of the connection points on the 1 st distribution manifold 102.

The 2 nd distribution manifold 103 is disposed at a height position substantially equal to the 1 st distribution manifold 102. That is, the 2 nd distribution manifold 103 is disposed at a position facing the 1 st distribution manifold 102 in the left-right direction.

The 2 nd distribution manifold 103 is connected to a pump (not shown) for supplying liquefied gas, as in the 1 st distribution manifold 102. The 2 nd distribution manifold 103 has an outer peripheral surface to which respective left ends of a plurality of 2 nd lower headers 127 are connected. On the other hand, the 1 st panel unit 110 is not connected to the 2 nd distribution manifold 103.

The spacing of the plurality of connection sites on the 2 nd distribution manifold 103 may also be substantially equal to the spacing of the plurality of connection sites on the 1 st distribution manifold 102. In this case, the plurality of connection points on the 2 nd distribution manifold 103 may be set at intermediate positions between adjacent connection points on the 1 st distribution manifold 102 in the arrangement direction of the plurality of heat transfer panels 101.

In the 2 nd recovery manifold 105, a supply device for supplying the gasification gas to a desired destination is connected, as in the 1 st recovery manifold 104. The 2 nd recovery manifold 105 is disposed substantially directly above the 2 nd distribution manifold 103. The 2 nd recovery manifold 105 is disposed at a height position substantially equal to the 1 st recovery manifold 104. That is, the 2 nd recovery manifold 105 is disposed at a position facing the 1 st recovery manifold 104 in the left-right direction.

The 2 nd recovery manifold 105 is connected to the outer peripheral surface thereof at the left ends of the plurality of 2 nd upper headers 128. On the other hand, the plurality of 1 st upper headers 127 of the 1 st panel unit 110 are not connected to the 2 nd recovery manifold 105.

Since the plurality of 2 nd heat transfer panels 121 are installed in the gasification apparatus 100 in a substantially vertical posture, the plurality of 2 nd upper headers 128 are positioned substantially directly above the connection points of the plurality of 2 nd lower headers 127 and the 2 nd recovery manifold 105, respectively, with respect to the connection points of the 2 nd recovery manifold 105. The interval of the connection points on the 2 nd recovery manifold 105 is substantially the same as the interval of the connection points on the 2 nd distribution manifold 103.

The 1 st panel unit 110 and the 2 nd panel unit 120 are attached to the mounting portion. The row of the plurality of heat transfer panels 101 is held at a position separated upward from the installation surface on which the vaporizing device 100 is installed, via the installation site. The mounting portion is described with reference to fig. 1A and 4. Fig. 4 is a schematic longitudinal sectional view of the vaporizer 100.

The mounting portion is configured to suspend the plurality of heat transfer panels 101. The mounting portion includes a pair of

support portions

131 and 132 each having a height dimension larger than that of the heat transfer panel 101 as a base portion. The support portion 131 is erected from the installation surface in front of the foremost heat transfer panel 101. The support portion 132 is erected from the installation surface behind the rearmost heat transfer panel 101.

The mounting portion further includes a holding body configured to hold the plurality of heat transfer panels 101 between the pair of

support portions

131, 132. The holding body includes a pair of

cross members

134 and 135 bridged over the

support portions

131 and 132, a plurality of suspension members 136 extending downward from the

cross members

134 and 135, and a pair of ears 138 projecting upward from the upper surfaces of the

cross members

134 and 135.

The

cross members

134 and 135 are disposed above the plurality of heat transfer panels 101. The

cross members

134 and 135 are spaced apart from each other in an orthogonal direction orthogonal to the arrangement direction of the plurality of heat transfer panels 101. The cross member 134 extends in the arrangement direction of the plurality of heat transfer panels 101 in the vicinity of the 1 st recovery manifold 104 with respect to the cross member 135. The cross member 135 extends in the arrangement direction of the plurality of heat transfer panels 101 in the vicinity of the 2 nd recovery manifold 105 with respect to the cross member 134.

Both end portions of the

cross members

134 and 135 are fixed to the upper surfaces of the

support portions

131 and 132. For fixing the

cross members

134 and 135 to the upper surfaces of the

support portions

131 and 132, a plurality of bolts are used, for example. If these bolts are removed, the

cross members

134, 135 can be separated from the

support portions

131, 132.

The pair of ears 138 are formed at positions apart from each other in the arrangement direction of the plurality of heat transfer panels 101. Through holes are formed in the pair of ear portions 138, respectively. The through holes of the lug portions 138 are used for connection to a lifting device (not shown) that lifts the

cross members

134 and 135 upward during maintenance work on the plurality of heat transfer panels 101.

The plurality of suspension members 136 extend downward from the

cross members

134 and 135, respectively. The suspension members 136 are disposed at positions corresponding to the heat transfer panels 101 in the arrangement direction of the heat transfer panels 101. The lower ends of the plurality of suspension members 136 are connected to the outer peripheral surface of the upper header 108 of the corresponding heat transfer panel 101. Each of the plurality of suspension members 136 is configured to be separable from the upper header 108 and the

cross members

134 and 135. Bolts may be used as the suspension members 136.

The vaporizer 100 has a portion for supplying seawater to the plurality of heat transfer panels 101. The parts responsible for the supply of seawater will be described with reference to fig. 1A and 4.

The vaporizer 100 includes a liquid supply unit 150 fixed to the

cross members

134 and 135, and a plurality of guides 160 disposed in a plurality of spaces formed between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121. The liquid supply portion 150 functions as a supply source of seawater to the outer surfaces of the heat transfer tubes 106 of the plurality of heat transfer panels 101. The plurality of guides 160 are used to capture seawater that has fallen from the liquid supply unit 150 into the space between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 and guide the captured seawater to at least one of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121.

The liquid supply unit 150 is disposed at a position above the plurality of heat transfer panels 101, and is fixed to the upper surfaces of the

cross members

134 and 135. The liquid supply unit 150 is connected to a pump (not shown) that discharges seawater. The liquid supply unit 150 has a shower structure for spraying the seawater supplied from the pump downward as a fine stream. The liquid supply unit 150 is configured to spray seawater over the entire area of the row in which the plurality of heat transfer panels 101 are formed. For example, a plurality of blowing holes (not shown) for blowing water may be formed in the lower surface of the liquid supply unit 150. These blowoff holes may be located above the space between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 adjacent to each other in the arrangement direction of the plurality of heat transfer panels 101. These blow-out holes may also be arranged in the orthogonal direction.

The plurality of guides 160 are disposed in the narrow spaces formed between the adjacent 1 st and 2 nd

heat transfer panels

111 and 121, respectively. The guide 160 is disposed at a position higher than the middle position of the heat transfer panel 101 and lower than the upper header 108 in the vertical direction.

The guide 160 is a plate member elongated in a direction orthogonal to the arrangement direction of the plurality of heat transfer panels 101 (see fig. 1A). A ridge is formed on the upper surface of the guide 160. The upper surface of the guide 160 includes an inclined surface inclined downward from the ridge line toward the front and an inclined surface inclined downward from the ridge line toward the rear. These inclined surfaces are connected to bolts (indicated by oblique short lines in fig. 4) extending obliquely downward from the outer peripheral surfaces of the pair of upper headers 108 located obliquely above the guide portions 160.

As for the flow of the liquefied gas, the liquefied gas is supplied to the 1 st distribution manifold 102 (see fig. 2A) and the 2 nd distribution manifold 103 (see fig. 2B). The liquefied gas supplied to the 1 st distribution manifold 102 and the 2 nd distribution manifold 103 flows into the 1 st lower header 117 and the 2 nd lower header 127, respectively. The liquefied gas flowing into the 1 st lower header 117 is distributed by the 1 st lower header 117 to the plurality of 1 st heat transfer tubes 116. The liquefied gas flowing into the 2 nd lower header 127 is distributed by the 2 nd lower header 127 to the plurality of 2 nd heat transfer tubes 126. The liquefied gas flows upward in the 1 st heat transfer pipe 116 and the 2 nd heat transfer pipe 126. During this period, the liquefied gas exchanges heat with the seawater flowing down the outer surfaces of the 1 st heat transfer pipe 116 and the 2 nd heat transfer pipe 126, and turns into a vaporized gas.

The gasification gas flows into the 1 st upper header 118 and the 2 nd upper header 128. The boil-off gas flowing into the 1 st upper header 118 is guided to the 1 st recovery manifold 104 by the 1 st upper header 118 and flows into the 1 st recovery manifold 104. The boil-off gas flowing into the 2 nd upper header 128 is guided by the 2 nd upper header 128 to the 2 nd recovery manifold 105, and flows into the 2 nd recovery manifold 105. The boil-off gas in the 1 st recovery manifold 104 and the 2 nd recovery manifold 105 is supplied to a destination.

The seawater used for heat exchange with the liquefied gas flows through the entire area of the row in which the plurality of heat transfer panels 101 are formed by the liquid supply unit 150. As a result, seawater is supplied to the outer surface of each of the plurality of heat transfer panels 101. Since each of the plurality of heat transfer panels 101 is erected in a substantially vertical posture, seawater flows down along the outer surface of each of the plurality of heat transfer tubes 106 of each of the plurality of heat transfer panels 101. The seawater flowing down along the outer surfaces of the heat transfer tubes 106 transfers heat to the liquefied gas in the heat transfer tubes 106, and the liquefied gas is gasified.

A part of the seawater sprayed from the liquid supply part 150 drops toward a space formed between the adjacent 1 st and 2 nd

heat transfer panels

111 and 121. The seawater dropped into the space between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 is caught by the guide 160 and guided to at least one of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121.

Since seawater is supplied to the plurality of heat transfer panels 101, maintenance work for the heat transfer panels 101 is performed in consideration of corrosion by seawater. As described above, the

cross members

134 and 135 are lifted during maintenance work. Before the lifting work of the

cross members

134 and 135, the connection portion of the machine which is an obstacle to the lifting work is removed. Fig. 5A is a schematic vertical sectional view of the vaporizer 100 after the disassembly operation. The maintenance operation will be described with reference to fig. 1A to 2B, 4, and 5A.

For the disassembly operation, the 1 st distribution manifold 102 and the 2 nd distribution manifold 103 are separated from the pumps that supply the liquefied gas to them. The 1 st recovery manifold 104 and the 2 nd recovery manifold 105 are separated from the supply device for supplying the boil-off gas to the required destination. The liquid supply unit 150 is separated from a pump that supplies seawater to the liquid supply unit 150. The plurality of guides 160 are removed from the gasification apparatus 100. After the support SS1 is disposed below the plurality of lower headers 117, the suspending members 136 used for suspending the plurality of 1 st heat transfer panels 111 are removed. As a result, the 2 nd panel unit 120 is suspended from the

cross members

134 and 135, and the 1 st panel unit 110 is supported by the support base SS 1. As a result of removing the hanging members 136 corresponding to the 1 st heat transfer panel 111, the 2 nd panel unit 120 and the 1 st panel unit 110 are separated from each other. Thus, the 2 nd panel unit 120 can be independently hoisted from the 1 st panel unit 110.

In addition to the above-described disassembling work, a preparatory work for lifting the

cross members

134 and 135 is performed. The ears 138 of the

cross members

134, 135 are tied with wire ropes WIR. A hoisting device (e.g., a crane; not shown) is connected to the wire rope WIR. The bolts that secure the

cross members

134, 135 to the

support portions

131, 132 are removed. The lifting device then lifts the cross beams 134, 135. Fig. 5B is a schematic vertical sectional view of the gasification apparatus 100 in which the

cross members

134 and 135 are lifted by the lifting device. The maintenance operation is further described with reference to fig. 1A to 2B, 5A, and 5B.

The hoisting device hoists the

cross members

134 and 135 to a predetermined raised position (for example, a position hoisted by about 2m from the position shown in fig. 5A). Since the 2 nd panel unit 120 is suspended from the

cross members

134 and 135 as described above, it rises together with the

cross members

134 and 135. On the other hand, the 1 st panel unit 110 is separated from the

cross members

134 and 135 by the above-described detaching operation, and therefore maintains the position shown in fig. 5A. While the

cross members

134 and 135 and the 2 nd panel unit 120 are being lifted, the 1 st panel unit 110 is supported by the support table SS 1.

As a result of the

cross members

134, 135 being lifted, a space is formed between the lower surfaces of the

cross members

134, 135 and the upper surfaces of the

support portions

131, 132. Support tables SS2 and SS3 are disposed in these spaces, respectively. The lifting device then lowers the cross beams 134, 135 a little. The

beams

134, 135 are placed on the support tables SS2, SS 3. The

cross members

134 and 135 and the support bases SS2 and SS3 are fixed to the upper surfaces of the

support portions

131 and 132.

After the

cross members

134 and 135 and the 2 nd panel unit 120 are fixed at the raised position, a plurality of new suspension members 139 are attached to the

cross members

134 and 135, respectively. The new suspension member 139 has a vertical length that is longer than the vertical length of the original suspension member 138. The lower ends of these suspension members 139 are connected to the outer peripheral surface of the 1 st upper header 118. After the 1 st panel unit 110 is fixed to the

cross members

134 and 135 by the connection of the suspension members 139 and the 1 st upper header 118, the support SS1 below the 1 st lower header 117 is removed. As a result, a larger space is formed below the 2 nd lower header 128. If the 2 nd panel unit 120 is suspended to a height of 3m from the installation surface and the interval of the adjacent 1 st heat transfer panels 111 is set to 600mm, a space of 3m height × 600mm width is developed in the left-right direction. The space is large enough for an operator to enter and perform a predetermined operation.

The lower portion of the 1 st heat transfer panel 111 is exposed to the space below the 2 nd heat transfer panel 121. The operator enters the space below the 2 nd heat transfer panel 121 and performs an inspection operation and a required repair operation on the lower portion of the 1 st heat transfer panel 111. For example, the worker can visually check whether the lower portion of the 1 st heat transfer panel 111 is corroded, or perform surface treatment for preventing corrosion by seawater on the lower portion of the 1 st heat transfer panel 111. The worker who has finished the maintenance work gets out of the space below the 2 nd heat transfer panel 121, operates the lifting device, and returns the 2 nd panel unit 120 and the left frame 140 to the original positions (i.e., the positions shown in fig. 5A).

The operator then performs the same operation as the operation described above with respect to the 1 st panel unit 110 on the 2 nd panel unit 120, and performs the same operation as the operation described above with respect to the 2 nd panel unit 120 on the 1 st panel unit 110. As a result, the 1 st panel unit 110 is independently moved to the raised position, forming a large space below the 1 st heat transfer panel 111. The operator enters the space below the 1 st heat transfer panel 111 and performs maintenance work on the 2 nd heat transfer panel 121.

The above-described gasification apparatus 100 is useful for obtaining a large gasification amount per unit installation area. As a result of the 2 nd heat transfer panel 121 being displaced upward, a large space for maintenance is formed below the 2 nd heat transfer panel 121, and therefore the interval between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 may be short. Therefore, the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 can be arranged densely. As a result, the gasification apparatus 100 can obtain a large gasification amount per unit installation area.

The 2 nd plate unit 120 including the plurality of 2 nd heat transfer plates 121 is a structure independent from the 1 st plate unit 110 including the plurality of 1 st heat transfer plates 111. If one of the

panel units

110, 120 is separated from the

cross members

134, 135 to which the

panel units

110, 120 are attached, the other panel unit can be displaced upward independently from the separated panel unit.

The

panel units

110 and 120 do not contact each other when the

panel units

110 and 120 are displaced upward independently of each other. Since the plurality of heat transfer panels 101 are arranged in the horizontal direction, one of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 is not positioned in the displacement direction of the other. Therefore, the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 do not come into contact with each other. The manifolds 102 to 105 of the

panel units

110, 120 are located on the side of the row of the plurality of heat transfer panels 101. Since the plurality of heat transfer panels 101 are not positioned above the manifolds 102 to 105, the manifolds 102 to 105 can be displaced upward without being obstructed by the plurality of heat transfer panels 101.

Manifolds

102 and 104 of panel unit 1 are disposed on the right side of the row of the plurality of heat transfer panels 101, while

manifolds

103 and 105 of panel unit 2 120 are disposed on the left side of the row of the plurality of heat transfer panels 101. Therefore, even if one of the

panel units

110, 120 is lifted independently from the other, contact between the manifolds 102 to 105 does not occur.

The liquid supply unit 150 is not disposed between the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121, but is disposed above these heat transfer panels 101. Therefore, the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 can be arranged relatively densely without interfering with the liquid supply portion 150. As a result, the gasification apparatus 100 can obtain a large gasification amount per unit installation area.

The seawater sprayed from the liquid supply part 150 flows down along the outer surface of the heat transfer panel 101. Unlike the downward flow of seawater, the flow of liquefied gas in the heat transfer panel 101 is upward. Thus, heat exchange between them is efficiently performed.

A part of the seawater sprayed from the liquid supply portion 150 may fall into a space between the pair of adjacent heat transfer panels 101. The seawater dropped into the space is caught by the guide 160 and guided to at least one of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121. Thus, the seawater sprayed from the liquid supply part 150 is used for heat exchange with the liquefied gas with little waste.

The guide 160 is a plate member elongated in the orthogonal direction orthogonal to the arrangement direction of the plurality of heat transfer panels 101. Therefore, the guide portion 160 can be disposed in a narrow space between the pair of adjacent heat transfer panels 101.

The 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 are arranged at substantially the same height position. That is, the plurality of 1 st lower headers 117 and the plurality of 2 nd lower headers 127 are arranged at substantially the same height. Similarly, the plurality of 1 st upper headers 118 and the plurality of 2 nd upper headers 128 are arranged at substantially the same height. Since the row of the plurality of 2 nd heat transfer panels 121 does not protrude upward or downward with respect to the row of the plurality of 1 st heat transfer panels 111, the row of the plurality of heat transfer panels 101 does not need an unnecessarily wide area in the vertical direction.

In the above-described relationship of the height positions among the 1 st lower header 117, the 2 nd lower header 127, the 1 st upper header 118, and the 2 nd upper header 128, a difference in length of the heat transfer tubes 106 among the plurality of heat transfer panels 101 hardly occurs. Since the length of the heat exchange section for liquefied gas is substantially constant between the plurality of heat transfer panels 101, variation in the amount of vaporized gas generated between the plurality of heat transfer panels 101 is suppressed.

The configurations and methods described in connection with the above embodiments are illustrative and should not be construed as being limited thereto. Various changes and improvements may be made to the structure and method described in connection with the above embodiments.

A lifting device is used to lift the plurality of heat transfer panels 101. However, instead of the lifting device, another device capable of displacing the 1 st panel unit 110 or the 2 nd panel unit 120 upward may be used. For example, a jack for pushing up the 1 st panel unit 110 or the 2 nd panel unit 120 may be used instead of the lifting device. In this case, a structure configured to be suitable for a pushing-up operation using a jack may be used as an attachment site for attaching the 1 st panel unit 110 or the 2 nd panel unit 120. Thus, the above description regarding the configuration of the mounting site should not be construed restrictively.

For spraying the plurality of heat transfer panels 101, a shower device that sprays a relatively fine water flow downward is used as the liquid supply unit 150. However, the liquid supply unit 150 may be configured to cause a water flow belt elongated in a direction orthogonal to the arrangement direction of the plurality of heat transfer panels 101 to flow down from a position higher than the plurality of heat transfer panels 101. Various devices capable of substantially uniformly supplying seawater to each of the plurality of heat transfer panels 101 can be used as the liquid supply unit 150.

If a device having a small size in the arrangement direction of the plurality of heat transfer panels 101 can be used as the liquid supply unit, the liquid supply unit may be disposed in a narrow space formed between the adjacent 1 st heat transfer panel 111 and 2 nd heat transfer panel 121. Fig. 6 shows a schematic longitudinal cross section of the vaporizer 100 having, as a liquid supply portion, a plurality of grooves 151 elongated in a direction orthogonal to the arrangement direction of the plurality of heat transfer panels 101. The grooves 151 are disposed in the gaps between the heat transfer panels 101. The height positions of the grooves 151 are set above the intermediate positions of the heat transfer panels 101 in the vertical direction and below the upper header 108. Each of the grooves 151 is a box elongated in the left-right direction and opened upward. Seawater is supplied to these trenches 151. The seawater supplied to each of the plurality of grooves 151 is supplied to each of the plurality of heat transfer tubes 106 of the plurality of heat transfer panels 101.

The guide 160 is used to effectively use the seawater sprayed from the liquid supply 150. However, if the effective use of seawater is not considered or other design conditions for the vaporizer are prioritized over the effective use of seawater, the guide 160 may not be provided.

The guide portion 160 has two inclined surfaces inclined downward toward the adjacent 1 st heat transfer panel 111 and 2 nd heat transfer panel 121, respectively. However, the guide 160 may have 1 inclined surface inclined downward toward one of the adjacent 1 st heat transfer panel 111 and 2 nd heat transfer panel 121 (see fig. 7). Fig. 7 is a schematic vertical sectional view of the vaporizer 100 using a plate-like member having a flat upper surface as the guide 160.

As shown in fig. 7, the gasification apparatus 100 may further include

additional guide portions

161 and 162 disposed in front of the foremost heat transfer panel 101 and behind the rearmost heat transfer panel 101 among the plurality of heat transfer panels 101. The guide 161 disposed in front of the foremost heat transfer panel 101 has an inclined surface inclined downward toward the heat transfer panel 101. The guide portion 162 disposed behind the rearmost heat transfer panel 101 has an inclined surface inclined downward toward the heat transfer panel 101. The seawater falling to the front and rear of the row of the plurality of heat transfer panels 101 is caught by these inclined surfaces. The captured seawater is supplied along these inclined surfaces to a pair of heat transfer panels 101 at both ends of the row of the plurality of heat transfer panels 101.

The gasification apparatus 100 has 9 heat transfer panels 101. However, more than 9 heat transfer panels 101 may be incorporated into the gasification apparatus, or less than 9 heat transfer panels 101 may be incorporated into the gasification apparatus. The number of heat transfer panels 101 to be incorporated into the gasification apparatus may be determined based on the amount of gasification required for the gasification apparatus.

The 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 are arranged at substantially equal height positions. However, they may be disposed at different height positions from each other so as to be suitable for the design conditions of the gasification apparatus in which they are incorporated.

The 1 st and 2 nd

heat transfer panels

111 and 121 are substantially identical in configuration and size. However, the 2 nd heat transfer panel may be different in configuration and/or size from the 1 st heat transfer panel 111. For example, the 2 nd heat transfer tubes of the 2 nd heat transfer panel may be shorter than the 1 st heat transfer tubes 116 of the 1 st heat transfer panel 111. The number of the 2 nd heat transfer tubes incorporated in the 2 nd heat transfer panel may be smaller than the number of the 1 st heat transfer tubes 116 of the 1 st heat transfer panel 111.

In the arrangement of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121 of the vaporizer 100, the heat transfer panels 101 are arranged such that the plurality of 2 nd heat transfer panels 121 are respectively erected between a pair of adjacent 1 st heat transfer panels 111. In this case, the front and rear vertical surfaces 109 of the 2 nd heat transfer panel 121 face the vertical surfaces 109 of the pair of 1 st heat transfer panels 111. However, another layout may be adopted in which each of the plurality of 2 nd heat transfer panels is adjacent to one of the plurality of 1 st heat transfer panels (see fig. 8). Fig. 8 is a schematic plan view of a gasification apparatus 100B having an alternative layout. The gasification apparatus 100B will be described in comparison with the gasification apparatus 100 shown in fig. 1A to 3.

The vaporizer 100B includes a 1 st panel unit 110B and a 2 nd panel unit 120B. The 1 st panel unit 110B corresponds to the 1 st panel unit 110 of the vaporizer 100, and includes the 1 st distribution manifold 102 and the 1 st recovery manifold 104. The 2 nd panel unit 120B corresponds to the 2 nd panel unit 120 of the vaporizer 100, and includes the 2 nd distribution manifold 103 and the 2 nd recovery manifold 105. The manifolds 102 to 105 will be described with reference to the vaporizer 100.

The 1 st panel unit 110B includes 4 1 st heat transfer panels 211 to 214. The structures of the 1 st heat transfer panels 211 to 214 are the same as those of the heat transfer panel 101 described with reference to FIG. 3. The 1 st heat transfer panels 211 to 214 are connected to the 1 st distribution manifold 102 and the 1 st recovery manifold 104 at intervals.

The 1 st heat transfer panel 211 is positioned foremost among the 1 st heat transfer panels 211 to 214, and the 1 st heat transfer panel 214 is disposed rearmost among the 1 st heat transfer panels 211 to 214. A large space for maintenance is formed between the 1 st heat transfer panel 211 and the front support portion 131. The 1 st heat transfer panel 212 is disposed behind the 1 st heat transfer panel 211 so as to be adjacent to the 1 st heat transfer panel 211. The 1 st heat transfer panel 213 is disposed between the 1 st

heat transfer panels

212, 214.

The interval between the 1 st

heat transfer panels

212 and 213 is set to a large value for maintenance work. On the other hand, the interval between the 1 st

heat transfer panels

211, 212 and the interval between the 1 st

heat transfer panels

213, 214 are set to be smaller than the interval between the 1 st

heat transfer panels

212, 213.

The 2 nd panel unit 120B includes 4 2 nd heat transfer panels 221 to 224. The structures of these 2 nd heat transfer panels 221 to 224 are the same as those of the heat transfer panel 101 described with reference to fig. 3. The 2 nd heat transfer panels 221 to 224 are connected to the 2 nd distribution manifold 103 and the 2 nd recovery manifold 105 at intervals.

The 2 nd heat transfer panel 221 is positioned at the forefront among the 2 nd heat transfer panels 221 to 224. The 2 nd heat transfer panel 222 is disposed behind the 2 nd heat transfer panel 221 so as to be adjacent to the 2 nd heat transfer panel 221. These 2 nd

heat transfer panels

221, 222 are erected in a large space between the 1 st

heat transfer panels

212, 213.

The 2 nd heat transfer panel 224 is positioned rearmost among the rows of the 1 st heat transfer panels 211 to 214 and the 2 nd heat transfer panels 221 to 224. A large space for maintenance is formed between the 2 nd heat transfer panel 224 and the rear support portion 132. The 2 nd heat transfer panel 223 is disposed in front of the 2 nd heat transfer panel 224 so as to be adjacent to the 2 nd heat transfer panel 224. These 2 nd

heat transfer panels

223, 224 are disposed behind the 1 st heat transfer panel 214.

The interval between the 2 nd

heat transfer panels

222, 223 is set to a large value for maintenance work. On the other hand, the interval between the 2 nd

heat transfer panels

221, 222 and the interval between the 2 nd

heat transfer panels

223, 224 are set to be smaller than the interval between the 2 nd

heat transfer panels

222, 223.

In the maintenance work for the 1 st heat transfer panels 211 to 214, if the 2 nd panel unit 120B is lifted, a large space is formed below the 2 nd

heat transfer panels

221 and 222 and below the 2 nd

heat transfer panels

223 and 224. The lower portions of the 1 st

heat transfer panels

212, 213 are exposed to the space below the 2 nd

heat transfer panels

221, 222. The lower portion of the 1 st heat transfer panel 214 is exposed to the space below the 2 nd

heat transfer panels

223, 224. The operator can enter the space below the 2 nd

heat transfer panels

221 and 222 and the space below the 2 nd

heat transfer panels

223 and 224 to perform maintenance work on the 1 st heat transfer panels 212 to 214. As described above, a large space for maintenance is formed in advance between the 1 st heat transfer panel 211 and the support portion 131 in the remaining 1 st heat transfer panel 211. Therefore, the maintenance work for the 1 st heat transfer panel 211 may be performed without performing the lifting work for the 2 nd panel unit 120B.

The maintenance work for the 2 nd heat transfer panels 221 to 224 is similarly performed after the 1 st panel unit 110B is lifted.

If maintenance work is required only for one of the 1 st heat transfer panel 111 and the 2 nd heat transfer panel 121, a manifold may be disposed only on one of the left and right sides of the row of heat transfer panels 101 (see fig. 9). Fig. 9 is a schematic vertical sectional view of an alternative vaporizer 100C.

The vaporizer 100C includes a 2 nd panel unit 120C corresponding to the 2 nd panel unit 120 of the vaporizer 100. The vaporizer 100C is different from the vaporizer 100 only in the 2 nd panel unit 120C. The description of the gasification apparatus 100 is applied to the gasification apparatus 100C except for the 2 nd panel unit 120C.

The 2 nd panel unit 120C is different from the 2 nd panel unit 120 in orientation and arrangement height. The 2 nd panel unit 120C has a plurality of 2 nd heat transfer panels 121, like the 2 nd panel unit 120. The plurality of 2 nd heat transfer panels 121 are held at positions higher than the plurality of 1 st heat transfer panels 111.

The 2 nd panel unit 120C is provided with a 2 nd distribution manifold 103C and a 2 nd recovery manifold 105C in addition to the plurality of 2 nd heat transfer panels 121. These

manifolds

103C, 105C are functionally common with the

manifolds

103, 105 of the 2 nd panel unit 120. The 2 nd distribution manifold 103C and the 2 nd recovery manifold 105C are arranged on the right side of the row of the plurality of heat transfer panels 101, similarly to the

manifolds

102 and 104 of the 1 st panel unit 110. The 2 nd distribution manifold 103C extends generally horizontally above the 1 st distribution manifold 102 and below the 1 st recovery manifold 104. The 2 nd recovery manifold 105C extends substantially horizontally above the 1 st recovery manifold 104.

The displacement above the 2 nd panel unit 120C is allowed in a vertical section from the position shown in fig. 9 to a height position where the 2 nd distribution manifold 103C and the 1 st collection manifold 104 are in contact with each other. If the 2 nd panel unit 120C is displaced upward, a large space for maintenance work is formed below the 2 nd panel unit 120C.

In 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.

In the above-described embodiment, seawater is exemplified as the heating liquid. However, other liquids having a higher temperature than the liquefied gas may be used as the heating liquid.

Industrial applicability

The technique described in connection with the above-described embodiment is preferably used in various technical fields requiring a phase change from liquefied gas to vaporized gas.

Description of the reference numerals

100. 100A-100C ･････ gasification device

102 ･･･････････････ 1 st distribution manifold

103. 103C ･･････････ No. 2 distribution manifold

111 ･･･････････････ heat transfer panel 1

121 ･･･････････････ heat transfer Panel No. 2

134. 135 ･･･････････ crossbeam (holding body)

136 ･･･････････････ suspension parts (holding body)

150 ･･･････････････ liquid supply part

160 ･･･････････････ guide part

211 ~ 214 ･･･････････ 1 st heat transfer panel

221-224 ･･･････････ heat transfer panel number 2.

Claims

1. A gasification apparatus for gasifying liquefied gas,

the disclosed device is provided with:

1 st distribution manifold;

a plurality of 1 st heat transfer panels each having a heat transfer pipe connected to the 1 st distribution manifold and into which the liquefied gas supplied through the 1 st distribution manifold flows;

a 2 nd distribution manifold;

a plurality of 2 nd heat transfer panels each having a heat transfer pipe connected to the 2 nd distribution manifold and into which the liquefied gas supplied through the 2 nd distribution manifold flows; and

a liquid supply unit for making the heating liquid flow down to the outer peripheral surface of the heat transfer pipe to vaporize the liquefied gas in the heat transfer pipe;

the plurality of 2 nd heat transfer panels are disposed adjacent to one of the plurality of 1 st heat transfer panels, respectively.

2. The gasification apparatus according to claim 1,

the 1 st distribution manifold and the 2 nd distribution manifold are located on opposite sides of the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels.

3. The gasification apparatus according to claim 1 or 2,

the liquid supply portion is disposed at a position higher than the plurality of 1 st heat transfer panels and the plurality of 2 nd heat transfer panels.

4. The gasification apparatus according to claim 3,

the heat exchanger further includes a guide portion for guiding the heating liquid flowing down from the liquid supply portion toward the heat transfer pipe.

5. The gasification apparatus according to any one of claims 1 to 4,

a holding body configured to hold the 1 st distribution manifold, the plurality of 1 st heat transfer panels, the plurality of 2 nd heat transfer panels, and the liquid supply unit;

the holding body is configured to be capable of releasing the connection with the 1 st distribution manifold and the 1 st heat transfer panels, and configured to be capable of releasing the connection with the 2 nd distribution manifold and the 2 nd heat transfer panels.

6. A maintenance method for maintaining the gasification apparatus according to any one of claims 1 to 5,

the disclosed device is provided with:

and (3) in a state where the 2 nd distribution manifold and the plurality of 2 nd heat transfer panels are connected to each other, displacing the 2 nd distribution manifold, the plurality of 2 nd heat transfer panels, and the liquid supply portion upward, and performing maintenance on the plurality of 1 st heat transfer panels.

7. A maintenance method for maintaining the gasification apparatus according to claim 5,

the disclosed device is provided with:

connecting a lifting device to the holding body;

separating the holding body from the 1 st distribution manifold and the 1 st heat transfer panels; and

the holding body is moved upward by the lifting device, and the 2 nd distribution manifold, the plurality of 2 nd heat transfer panels, and the liquid supply portion are moved upward.

8. The maintenance method of claim 7,

the 1 st heat transfer panel and the 2 nd heat transfer panel are held by the holding body at positions separated upward from an installation surface on which the vaporizing device is installed;

further provided with:

disposing a support table below the plurality of 1 st heat transfer panels before separating the holder from the 1 st distribution manifold and the plurality of 1 st heat transfer panels;

fixing the height position of the holding body after the holding body moves upwards;

connecting the 1 st heat transfer panels to the holder with the height fixed; and

removing the support table.