WO2017179867A1

WO2017179867A1 - Flare gas discharge regulator

Info

Publication number: WO2017179867A1
Application number: PCT/KR2017/003864
Authority: WO
Inventors: 나장훈
Original assignee: 필즈엔지니어링 주식회사
Priority date: 2016-04-12
Filing date: 2017-04-10
Publication date: 2017-10-19

Abstract

The present invention relates to a flare gas discharge regulator for preventing backfire while simplifying the structure. Specifically, the present invention relates to a flare gas discharge regulator comprising: a stack portion for guiding a flare gas such that the flare gas rises in a vertical direction; and an opening/closing floater which moves up and down between a first operating position seated in an opening of the upper end of the stack portion and a second operating position levitating from the opening at a predetermined height so as to selectively open and close the opening of the upper end of the stack portion.

Description

Flare gas emission control device

The present invention relates to a flare gas emission control device, and to a flare gas emission control device for preventing the backfire phenomenon while simplifying the structure.

In general, flare gas is a waste gas generated in an oil refinery or the like and is a gas having volatile and flammable properties.

The flare gas is discharged to the outside through a flare gas discharge device called a flare stack.

The flare stack according to the prior art includes an open discharge port through which flare gas is discharged, and an ignition unit for burning the flare gas at the same time as the flare gas is discharged.

Since the flare stack according to the related art has an open outlet, the ignition part when the atmospheric pressure outside the flare stack is greater than the internal gas pressure of the flare stack (that is, the internal pressure of the flare stack becomes lower than atmospheric pressure) There has been a problem that a backfire phenomenon occurs where the flow of flame generated by the back flows back into the flare stack. This backfire phenomenon has been a problem that increases the risk of flare stack explosion by suddenly increasing the pressure inside the flare stack.

In order to prevent such backfire, another flare stack according to the related art further includes a purge gas supply device for ejecting purge gas, which is an inert gas, in an upward direction inside the flare stack. By supplying purge gas through the purge gas supply device, the gas pressure inside the flare stack can be always kept higher than the atmospheric pressure outside to prevent backfire.

However, in the case of the purge gas supply apparatus provided in the flare stack according to another conventional technology, there is a problem that the manufacturing cost of the flare stack is excessively increased due to a complicated structure, and the purge gas usage is large, and thus the maintenance cost of the flare stack is maintained. There has been a problem of greatly increasing this.

Accordingly, an object of the present invention is to provide a flare gas emission control device that solves the problems according to the prior art.

Specifically, it is an object of the present invention to provide a flare gas emission control device that can prevent the backfire phenomenon in the flare stack or flare system.

According to an embodiment of the present invention for solving the above problems, the present invention includes a stack unit for guiding the flare gas so that the flare gas rises in the vertical direction; And opening and closing the floater vertically moving between a first operating position seated in the opening and a second operating position supporting a predetermined height from the opening to selectively open and close the opening of the upper end of the stack portion. A device can be provided.

Preferably, the opening / closing plotter has its own weight, and the weight of the opening / closing plotter is the second opening / closing plotter when the internal gas pressure of the stack portion at the first operating position is equal to or greater than a predetermined pressure. A weight of the opening / closing plotter which can move to the operating position and allow the opening / closing plotter to maintain the first operating position when the internal gas pressure of the stack portion at the first operating position is less than a predetermined pressure. It is done.

Further, preferably, the opening and closing plotter includes a lower portion seated in the opening of the stack portion, and an upper portion extending in the upper direction from the lower portion, wherein the upper portion and the lower portion or the lower portion, And a coanda structure that prevents a flame from spreading in a horizontal direction due to combustion of the flare gas in a portion of the upper portion and the lower portion or in a portion of the lower portion.

Preferably, the lower portion has a parabolic shape that is convex in a downward direction in a portion or the entirety of the lower portion, and the lower portion is an outer pressure to which gas pressure of flare gas rising through the stack portion is applied. It is characterized by having a surface.

Also preferably, the upper portion includes an upper hollow space therein and the lower portion includes a lower hollow space therein.

In addition, the lower portion is characterized in that it comprises a lower solid portion in the lower portion of the lower hollow space.

Preferably, the lower portion has a lower hollow space formed therein, an outer pressurized surface to which gas pressure of a flare gas rising through the stack portion is applied, and a penetrating portion formed through the outer pressurized surface. And a plurality of gas inlets through which the flare gas flows into the lower hollow space, and the upper portion includes an upper hollow space formed therein, and an inner pressurized surface to which gas pressure of the flare gas introduced through the gas inlet is applied. Characterized in that it comprises a.

Further, preferably, the upper portion has a conical shape in which the cross-sectional diameter gradually decreases toward the upper direction, and the lower portion has a parabolic shape that is convex in the lower direction in some or all of the lower portion. It is done.

Further, preferably, the upper end of the upper portion forms a tip of an attached shape, and the side surface from the lower portion to the tip of the upper portion forms a continuous surface so that no eddy current due to a short circuit occurs. It is done.

Also, preferably, the flare gas discharge control device further includes an end support, wherein the stack includes a first flange provided at an upper end of the stack, and the end support is coupled to the first flange. And a second flange portion and an opening having a diameter smaller than the maximum outer diameter of the opening and closing plotter.

In addition, preferably, the upper inner surface of the end support portion is provided with an upper seating surface formed of a curved surface corresponding to the curved surface of the lower portion of the opening and closing plotter.

In addition, preferably, the guide portion for guiding the lifting movement of the opening and closing the floater along the longitudinal direction of the stack portion; characterized in that it further comprises a.

In addition, preferably, the guide portion is provided in a position corresponding to the position of the plurality of guide rods extending from the lower portion of the opening and closing plotter in the vertical lower direction and the inner side of the stack portion of the plurality of guide rods, And a plurality of guide brackets each including a through hole through which the plurality of guide bars penetrate, and a plurality of stoppers provided at the free end of the mall guide rod at a lower portion of the guide bracket and having an outer diameter greater than the diameter of the through hole. It features.

According to the above-mentioned solution means, the present invention can effectively prevent the backfire phenomenon in the flare stack or flare system by using a mechanical balance between the self-weight of the opening and closing plotter and the internal gas pressure of the stack portion.

In addition, the present invention can prevent the backfire phenomenon without the complicated and expensive purge gas supply device by using the opening and closing plotter, thereby simplifying the overall structure of the flare stack or flare system, while reducing the manufacturing cost, it is sure to prevent the backfire phenomenon You can prevent it.

In addition, the present invention is configured so that the gas pressure is applied to the inner side of the upper portion of the opening and closing plotter, it is possible to stably support the floating and descending process of the opening and closing plotter.

In addition, the present invention is to form the structure of the opening and closing plotter lower or higher than the upper portion or having a lower solid portion in the lower portion, so that the overall geometric center and / or center of gravity of the opening and closing plotter is formed in the lower portion It is possible to stabilize the attitude of the opening and closing floater during the flotation and descent of the opening and closing floater.

In addition, the present invention is further provided by the end support portion, by additionally combining only the end support portion to the existing stack, it is possible to easily mount or mount the opening and closing plotter, it is possible to improve the compatibility of the flare gas discharge control device.

1 is a schematic perspective view of a flare gas emission control device according to a first embodiment of the present invention,

2 is a schematic exploded perspective view of a flare gas emission control device according to a first embodiment of the present invention,

3 is a schematic longitudinal cross-sectional view and a partially enlarged view of a flare gas emission control device according to a first embodiment of the present invention when the first operating position;

4 is a schematic longitudinal cross-sectional view and a partially enlarged view of a flare gas emission control device according to the first embodiment of the present invention when the second operating position;

5 is a schematic longitudinal sectional view and a partially enlarged view of a flare gas emission control device according to a further embodiment of the first embodiment of the present invention when in the second operating position;

Figure 6 is a schematic perspective view of the flare gas emission control device according to a second embodiment of the present invention,

FIG. 7 is a schematic bottom view of the opening and closing plotter of FIG. 6;

8 is a schematic longitudinal cross-sectional view and a partially enlarged view of a flare gas emission control device according to a second embodiment of the present invention when the first operating position;

9 is a schematic longitudinal cross-sectional view and a partially enlarged view of a flare gas emission control device according to a second embodiment of the present invention when the second operating position;

10 is a perspective view for explaining a specific shape of the opening and closing plotter that can be applied to the flare gas discharge control apparatus according to a third embodiment of the present invention,

11 is a view showing four types of plotter shapes applied to the experiment,

12 to 13 are graphs comparing vibration levels of the plotter shapes of FIG. 11.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. In the accompanying drawings, it should be noted that the same reference numerals are used in the drawings to designate the same configuration in other drawings as much as possible. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. And certain features shown in the drawings are enlarged or reduced or simplified for ease of description, the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

1 is a schematic perspective view of a flare gas discharge control device 1000 according to a first embodiment of the present invention, Figure 2 is a schematic view of a flare gas discharge control device 1000 according to a first embodiment of the present invention. 3 is a schematic exploded perspective view, and FIG. 3 is a schematic longitudinal cross-sectional view and a partially enlarged view of a flare gas emission control device 1000 according to the first embodiment of the present invention when the first operating position, and FIG. 4 is a second operating position. Is a schematic longitudinal sectional view and a partially enlarged view of the flare gas discharge control device 1000 according to the first embodiment of the present invention, Figure 5 is a further embodiment of the first embodiment of the present invention when the second operating position Figure is a schematic longitudinal cross-sectional view and a partial enlarged view of the flare gas emission control device 1000 according to.

1 to 4, the flare gas discharge control device 1000 according to the first embodiment of the present invention, the stack portion 100, the end support portion 200, the opening and closing plotter 300 It includes.

The stack part 100 is configured to guide the flare gas (flow) so that the flare gas rises in the vertical direction. For example, the stack part 100 is installed perpendicular to the ground, and has a hollow cylindrical columnar shape having a constant diameter or a tapered hollow cylindrical columnar shape whose cross section diameter decreases toward an upper portion thereof.

Although not shown in the drawings, at least one ignition device for burning flare gas is provided at the upper end of the stack part 100.

In addition, an upper end portion of the stack part 100 is provided with an opening in which flare gas is discharged while communicating with the stack inside and outside.

The opening and closing plotter 300 is configured to selectively open and close the opening of the upper end of the stack portion 100. Specifically, the opening and closing plotter 300 is configured to move up and down between a first operating position seated in the opening and a second operating position to support a predetermined height from the opening. Here, in the second operation position is to be floating in the air by the upward gas pressure of the flare gas.

In order for the opening and closing plotter 300 to operate as described above, the opening and closing plotter 300 has a specific weight of a predetermined size or more.

Specifically, the weight of the opening and closing plotter 300, the opening and closing plotter 300 is the second operating position when the internal gas pressure of the stack unit 100 in the first operating position is a predetermined pressure or more. The opening and closing plotter 300 to maintain the first operating position when the internal gas pressure of the stack part 100 at the first operating position is less than a predetermined pressure. It is the weight of (300).

For example, the predetermined pressure is set to be larger than the sum of the pressure due to the weight of the opening and closing plotter 300 and the large company.

The opening and closing plotter 300 includes a lower portion 310 seated in the opening of the stack portion 100, and an upper portion 320 extending upward from the lower portion 310.

Preferably, the upper portion 320 and the lower portion 310 may be configured such that the height of the lower portion 310 is greater than the height of the upper portion 320. As a result, the opening and closing plotter 300 has a shape in which the geometric center and / or the center of gravity are concentrated in the lower portion 310 as a whole. This is because the floating state in the second operation position, so as to form the center of gravity in the lower portion like the ottoman so that the opening and closing plotter 300 does not tilt to one side.

As a further embodiment, as shown in FIG. 5, the lower portion 310 may include a lower solid portion 313 below the lower hollow space 312. As a result, the opening and closing plotter 300 may have a shape in which the geometric center and / or the center of gravity are more concentrated in the lower portion 310 as a whole.

In addition, the upper portion 320 and the lower portion 310 may have a coanda structure, or only the lower portion may have a coanda structure. Thus, it is possible to prevent the flame from spreading in the horizontal direction due to the combustion of the flare gas.

The lower portion 310 has a parabolic shape that is convex in some section or the whole in the downward direction, and the lower portion 310 is pressurized to the outside of the gas pressure of the flare gas rising through the stack portion 100 A face 311 is provided.

In addition, the lower portion 310 includes a lower hollow space 312 therein.

The upper portion 320 has a conical shape in which the cross-sectional diameter gradually decreases toward the upper direction, and the shape of the upper portion 320 is such that the flow of flame due to the ignition of the flare gas is applied to the surface of the upper portion 320. It can cause the effect of getting closer.

The upper portion 320 includes an upper hollow space 323 therein. That is, the upper portion 320 and the lower portion 310 has a hollow space, respectively, as shown in Figures 3 and 4, the opening and closing plotter 300 as a whole includes an interior receiving space It has a shape. Thus, by adjusting the increase and decrease of the inner receiving space when manufacturing the opening and closing plotter 300, it is possible to adjust the weight of the opening and closing plotter 300 in accordance with the discharge capacity of the flare stack.

As shown in FIG. 3, when the internal gas pressure of the stack unit 100 is less than the sum of the self-weight and atmospheric pressure of the opening and closing plotter 300, the opening and closing plotter 300 can only maintain the first operating position as it is. As a result, the opening of the stack part 100 is closed. In this way, since the opening and closing plotter 300 closes the opening in the first operating position, the flare gas inside is not discharged to the outside, and the outside air does not flow into the inside. That is, when the opening and closing plotter 300 is in the first operating position, the backfire phenomenon is basically blocked without the purge supply device.

As shown in FIG. 4, when the internal gas pressure of the stack unit 100 is equal to or more than the sum of the own weight and the atmospheric pressure of the opening and closing plotter 300, the opening and closing plotter 300 is moved from the first operating position to the second operating position. Float to open a part of the opening of the stack 100. That is, since the opening and closing plotter 300 floats at a predetermined height from the opening in the second operating position, a flare gas discharge port is formed between the opening and closing plotter 300 and the opening. At this time, even if the opening of the stack portion 100 is opened, the internal gas pressure of the stack portion 100 is already in a state that significantly exceeds the atmospheric pressure, it is possible to prevent the backfire phenomenon occurs.

The distal support 200 may be additionally coupled to the upper portion of the stack 100. Here, the end support 200 has a shape and size optimized for the opening and closing plotter 300.

To this end, the stack part 100 includes a first flange part 111 provided at the upper end of the stack part 100.

In addition, the distal support 200 includes a second flange 210 coupled to the first flange 111, an opening having a diameter smaller than the maximum outer diameter of the opening and closing plotter 300, and an upper seating surface. 230.

The first flange portion 111 and the second flange portion 210 are coupled by fastening means such as bolts and nuts.

The opening 220 of the distal support 200 has a diameter smaller than the maximum outer diameter of the opening and closing plotter 300 (that is, the lower end of the upper part 320 and the upper end of the lower part 310). For this reason, a part of the lower portion 310 of the opening and closing plotter 300 is seated in the opening 220 of the distal support 200.

An upper seating surface 230 is provided on the upper inner surface of the distal support 200. The upper seating surface 230 is formed as a curved surface corresponding to the curved surface of the lower portion 310 of the opening and closing plotter 300, it can be surely blocked the opening when the opening and closing plotter 300 is the first operating position. And, in the second operating position serves to guide the flow of the flare gas.

Preferably, as shown in Figures 2 to 5, the flare gas discharge control device 1000 includes a guide portion 400, the guide portion 400 is raised and lowered of the opening and closing plotter 300. It is configured to guide the movement along the longitudinal direction of the stack portion 100. That is, due to the guide unit 400, even when operating in a strong wind outside, the opening and closing plotter 300 does not bias in one direction of the horizontal direction up and down along the longitudinal direction of the stack portion 100 It can move, thereby ensuring the stability of the lifting movement of the opening and closing plotter 300.

In detail, the guide part 400 includes a plurality of guide rods 410, a plurality of guide brackets 420 provided to correspond to the quantity and position of the plurality of guide rods 410, and the plurality of guides. Each of the rods 410 includes a plurality of stoppers 430 provided at free end portions.

The guide rod 410 is configured to extend in the vertical lower direction from the lower portion of the opening and closing plotter 300. The guide rod 410 may be formed of, for example, one of a cylindrical shape, a cylindrical shape, and a square pillar shape.

The guide bracket 420 is provided at a position corresponding to the position of the guide rod 410 on the inner side surface of the stack portion 100 or the inner side surface of the end support portion 200. The guide bracket 420 includes a through hole 421 through which the guide bar 410 passes, and the through hole 421 is formed to be larger than an outer diameter of the guide bar 410.

The stopper 430 is provided at the free end of the mall guide rod 410 at the bottom of the guide bracket 420. In addition, the stopper 430 is formed to have an outer diameter larger than the diameter of the through hole 421.

The stopper 430 may limit the floating height of the opening / closing plotter 300 even when the gas pressure inside the stack 100 is excessively increased, so that the opening / closing plotter 300 is stacked. The departure from the part 100 can be prevented.

6 is a schematic perspective view of the flare gas discharge control device 1000 according to the second embodiment of the present invention, Figure 7 is a schematic bottom view of the opening and closing plotter 300 of Figure 6, Figure 8 is In the case of the first operating position is a schematic longitudinal cross-sectional view and a partial enlarged view of the flare gas discharge control device 1000 according to the second embodiment of the present invention, Figure 9 is a second embodiment of the present invention when the second operating position A schematic longitudinal sectional view and a partial enlarged view of a flare gas emission control apparatus 1000 according to an example.

The flare gas emission control device 1000 according to the second embodiment of the present invention includes the components and technical features of the flare gas emission control device 1000 according to the first embodiment of the present invention as described above, and thus overlaps. The detailed description will be omitted as much as possible.

As illustrated in FIGS. 6 to 9, the opening and closing plotter 300 includes an upper portion 320 and a lower portion 310.

In addition, the upper portion 320 has a conical shape in which the cross-sectional diameter gradually decreases toward the upper direction, and the lower portion 310 has a parabolic shape that is convex in the lower direction.

Specifically, the lower portion 310 of the opening and closing plotter 300, the outer hollow space 312 formed therein, and the outer blood is applied to the gas pressure of the flare gas rising through the stack portion 100 And a plurality of gas inlets 330 formed through the pressing surface 311 and the outer pressurized surface 311 through which the flare gas flows into the lower hollow space 312.

In this case, as illustrated in FIG. 7, the plurality of gas inlets 330 may be provided to be spaced apart from each other by a predetermined angle in the radial direction around the center of the lower portion 310.

The upper portion 320 includes an upper hollow space 323 formed therein and an inner pressure surface 321 to which gas pressure of the flare gas introduced through the gas inlet 330 is applied. The inner pressurized surface 321 has a triangular shape.

According to this embodiment, the opening and closing plotter 300 is applied to the inner pressure surface 321 of the upper portion 320 as well as the external pressure surface of the lower portion 310 at the same time because the gas pressure is floating, so When floating or floating of the floater 300 for floating may be floating in a stable posture.

10 to 13 are views for explaining the opening and closing plotter 300 of a specific shape that can be applied to the flare gas discharge control device 100 according to a third embodiment of the present invention.

10 shows a flare gas discharge control device 100 according to a third embodiment of the present invention, and the shape and structure of the stack part 100 and the like positioned below the opening and closing plotter 300 are described above. There is not much difference from the example.

However, the opening and closing plotter 300 shown in FIG. 10 is different from the opening and closing plotter 300 exemplified above in that it is formed of only a continuous surface up to the tip portion formed at the upper end without a discontinuous surface in the side portion. There is, if you want to apply the form of the conventional tulip-shaped coanda structure, such as a discontinuous surface is formed in the coanda structure located on the upper portion of the stack 100 as the flare gas emission control device 100 of the present invention, Vortex phenomenon occurs in the discontinuous surface, the opening and closing plotter 300 in direct contact with the upper edge of the stack portion 100 intensifies the vibration phenomenon (so-called chattering phenomenon) in the left and right directions, causing severe noise Of course, it was confirmed through experiments that it may adversely affect the mechanical life.

The experimental content related to this will be described with reference to FIGS. 11 to 13.

11 shows four types of opening and closing plotters 300 applied to the present experiment. A) similar to the tulip-shaped Coanda structure that has been applied to form a Koanda air flow in the prior art, in the form of the opening and closing plotter 300 according to the present invention is a) tulip-shaped, In addition, various modifications according to the theoretical basis of the third embodiment having only continuous aspects were applied as b) strawberry type, c) egg type, d) water drop type, and the like.

FIG. 12 is a graph comparing vibrations in the up and down direction among vibration phenomena generated when each of the opening and closing plotters 300 is supported by applying the pressure of the same condition with the same separation distance for each of the shapes of FIG. 11. Although, a) is a graph comparing the four open and close plotters 300.

When viewed from the side, in the case of a tulip-shaped top cut flat, it can be seen that the vibrating vibrates severely compared to the opening and closing plotters 300 having different continuous sides even with the naked eye. It can be expected that the risk of damage will be severe.

In addition, Figure 13 compares the degree of vibration in the left and right direction of the vibration phenomenon that occurs when each of the opening and closing the plotter 300 is applied by applying the pressure of the same conditions with the same separation distance for each of the shapes of Figure 11 Graphs, but also a) is a graph comparing all four open and close plotters 300.

As in the previous results, in the case of the tulip type, it was confirmed that the vibrating was severely different from the other opening and closing plotter 300 having a continuous side.

Through these experiments, it was confirmed that there is no discontinuous surface on the side of the opening and closing plotter 300 so as to minimize the vortex of the fluid.

In addition, in more detail, through Figure 12 or 13, among the strawberry, egg-shaped, droplet-shaped, the pattern of the vibration pattern in the unit of about 0.01 0.01, the unit of the droplet is 0.0005 in the strawberry type is 0.0005 From the point of view when subdividing the unit, it was confirmed that strawberry type is the best form in terms of vibration prevention.

In the case of the strawberry type, the discharged gas ascends the side of the co-planar side to provide a simple path that is almost straight afterwards, thereby guiding and stably guiding the flow of fluid even when compared to other egg-shaped and droplet-type shapes. It is expected to be because it is the structure that applies the aspect most effectively.

According to the above, the present invention can effectively prevent the backfire phenomenon in the flare stack or flare system by using the mechanical balance between the self-weight of the opening and closing plotter and the internal gas pressure of the stack portion.

Although illustrated and described in the specific embodiments to illustrate the technical idea of the present invention, the present invention is not limited to the same configuration and operation as the specific embodiment as described above, and various modifications do not depart from the scope of the present invention. It can be carried out within. Therefore, such modifications should also be regarded as belonging to the scope of the present invention, and the scope of the present invention should be determined by the claims below.

Claims

A stack unit configured to guide the flare gas so that the flare gas rises in the vertical direction;

And opening and closing the floater vertically moving between a first operating position seated in the opening and a second operating position supporting a predetermined height from the opening to selectively open and close the opening of the upper end of the stack portion. Device.
The method of claim 1,

The opening and closing plotter has its own weight,

The self-weight of the opening and closing plotter is

The opening and closing plotter may move to the second operating position when the internal gas pressure of the stack portion in the first operating position is greater than or equal to a predetermined pressure.

Flare gas discharge control device, characterized in that the weight of the opening and closing plotter to maintain the first operating position when the internal gas pressure of the stack portion in the first operating position is less than a predetermined pressure. .
The method of claim 1,

The opening and closing plotter includes a lower portion seated in the opening of the stack portion, and an upper portion extending upward from the lower portion,

The upper portion and the lower portion or the lower portion are coandas to prevent the spread of the flame due to the combustion of the flare gas in a portion of the upper portion and the lower portion or in a portion of the lower portion in the horizontal direction. Flare gas emission control device comprising a (coanda) structure.
The method of claim 3,

The lower portion has a parabolic shape that is convex in a downward direction in a portion or the entirety of the lower portion,

And the lower portion has an outer pressurized surface to which the gas pressure of the flare gas rising through the stack part is applied.
The method of claim 3,

The upper portion includes an upper hollow space therein,

Flare gas emission control device, characterized in that the lower portion includes a lower hollow space therein.
The method of claim 5,

The lower portion is flare gas emission control device characterized in that it comprises a lower solid portion in the lower portion of the lower hollow space.
The method of claim 3,

The lower portion includes a lower hollow space formed therein, an outer pressurized surface to which gas pressure of the flare gas rising through the stack unit is applied, and a flare formed through the outer pressurized surface to penetrate the lower hollow space. It includes a plurality of gas inlet through which gas is introduced,

And the upper part includes an upper hollow space formed therein and an inner pressurized surface to which gas pressure of the flare gas introduced through the gas inlet is applied.
The method of claim 7, wherein

The upper portion has a conical shape in which the cross-sectional diameter gradually decreases in an upward direction,

The lower portion is flare gas emission control device characterized in that it has a parabolic shape convex in the lower direction in some sections or the whole of the lower portion.
The method of claim 3,

The upper end of the upper portion forms the tip of the attached shape, the side from the lower portion to the tip of the upper portion of the flare gas discharge control characterized in that the continuous surface is formed so that no vortex due to short circuit occurs Device.
The method according to any one of claims 1 to 9,

The flare gas emission control device further comprises a terminal support,

The stack part includes a first flange part provided at the upper end of the stack part,

The end support portion, the second flange portion coupled to the first flange portion, flare gas emission control device, characterized in that it comprises an opening having a diameter smaller than the maximum outer diameter of the opening and closing plotter.
The method of claim 10,

Flare gas emission control device, characterized in that the upper inner surface is formed with a curved surface corresponding to the curved surface of the lower portion of the opening and closing plotter, the upper end of the support portion.
The method according to any one of claims 1 to 9,

Flare gas discharge control device further comprises; a guide portion for guiding the lifting movement of the opening and closing the floater along the longitudinal direction of the stack portion.
The method of claim 12,

The guide unit,

A plurality of guide rods extending in a vertical lower direction from a lower portion of the opening and closing plotter;

A plurality of guide brackets provided at positions corresponding to positions of the plurality of guide rods on the inner side of the stack part, each of which includes a through hole through which the plurality of guide rods pass;

Flare gas discharge control device, characterized in that it comprises a plurality of stoppers provided at the free end of the mall guide rod in the lower portion of the guide bracket, the outer diameter larger than the diameter of the through hole.