Liquid chlorine pressure relief tank

Abstract

The utility model provides a liquid chlorine pressure relief tank. The liquid chlorine pressure relief tank comprises a tank body with a cavity, a flow guide assembly connected in the tank body, and a buffer assembly arranged below the flow guide assembly. The flow guide assembly comprises a shell abutting against the inner wall of the tank body and a spiral plate arranged in the shell, an air inlet used for ventilation is formed in the upper portion of the shell, and an air vent is formed in the lower portion of the shell. A flow guide channel is formed between the spiral plate and the shell. The buffer assembly comprises a cover body arranged below the flow guide channel, a convex arc section is arranged on the cover body, a plurality of ventilation holes used for ventilation are formed in the cover body, and the cover body abuts against the inner wall of the tank body. An inlet is formed above the tank body, and an outlet is formed below the tank body. The pressure relief tank effectively disperses the impact force generated when chlorine enters the pressure relief tank, prevents the pressure from being excessively high instantly, and ensures the safe operation of the pressure relief tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical raw material liquid chlorine production reserve technical field, especially in kind of liquid chlorine pressure relief tank. BACKGROUND

[0002] Liquid chlorine warehouse is the place of storing dangerous chemical liquid chlorine, and liquid chlorine leakage is a serious safety accident, and the leakage of liquid chlorine is an emergency treatment measure, which can effectively prevent poisoning, explosion and other hazards caused by liquid chlorine leakage, and ensure personnel safety and environmental safety.

[0003] Under normal circumstances, the pressure in the liquid chlorine storage tank is high, and once leakage occurs in a part of the storage tank, especially the liquid phase part at the bottom of the storage tank, it is very difficult to plug the leakage under pressure, and the currently used method is to sequentially discharge the gaseous chlorine in the storage tank to the emergency absorption tower or directly discharge to the tail gas absorption system through the pressure relief pipeline, so that the pressure in the tank is reduced to normal pressure. Although this treatment method can handle the leakage in time, when the leakage amount is large, it may cause the load of the tail gas absorption system to be too high, affecting the treatment efficiency, and even may exceed the carrying capacity of the system, causing the load of the tail gas absorption system to be unstable, causing system failure.

[0004] Because the impact force of liquid chlorine pressure relief is large, if it is directly released into the tank, the pressure in the pressure relief tank may be instantaneously too high, which may cause overpressure and lead to safety accidents such as explosion of the pressure tank, causing serious harm to personnel and environment. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a liquid chlorine pressure relief tank, which can effectively disperse the impact force of liquid chlorine entering the pressure relief tank and ensure the safety of the pressure relief tank.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A liquid chlorine pressure relief tank, comprising a tank body with a cavity, a flow guide assembly connected in the tank body, and a buffer assembly arranged below the flow guide assembly;

[0008] The flow guide assembly comprises a shell abutting against the inner wall of the tank body, a spiral plate arranged in the shell, an air inlet for ventilation arranged above the shell, and an air vent arranged below the shell;

[0009] The spiral plate and the shell form a flow guide channel therebetween;

[0010] The buffer assembly comprises a cover arranged below the flow guide channel, a convex arc segment arranged on the cover, a plurality of air vents arranged on the cover for ventilation, and the cover abutting against the inner wall of the tank body; an inlet is arranged above the tank body, and an outlet is arranged below the tank body.

[0011] Further, the middle part of the shell is provided with a center tube, and the spiral plate is connected between the center tube and the shell.

[0012] The center tube and the air vent have a flow gap.

[0013] Further, the air inlet cavity is formed between the shell and the upper part of the tank body, and the release cavity is formed in the center tube.

[0014] The buffer cavity is formed between the cover body and the shell.

[0015] The steady flow cavity is formed between the cover body and the lower part of the shell.

[0016] The release cavity and the buffer cavity are communicated.

[0017] Further, the side wall of the center tube is provided with a flow-through groove.

[0018] The flow-through groove communicates the flow guide channel and the release cavity.

[0019] The center tube is further connected with an elastic baffle, and the elastic baffle is arranged in the flow-through groove.

[0020] Further, the side of the flow-through groove close to the flow guide channel is provided with a sieve plate, and the sieve plate is provided with a plurality of through flow holes.

[0021] The sieve plate is provided with a first pressure sensor and a first driving part.

[0022] When the air pressure detected by the first pressure sensor is higher than the set threshold value, the power output end of the first driving part pushes one end of the elastic baffle to move, and the flow guide channel and the release cavity are communicated.

[0023] Further, the convex arc segment is provided with a first concave arc segment and a second concave arc segment on both sides thereof.

[0024] The radii of the first concave arc segment and the second concave arc segment are not equal.

[0025] The air vent is arranged to decrease downward from the convex arc segment.

[0026] Further, the convex arc segment includes a slow flow segment, a horizontal flow segment, and a rapid flow segment connected in sequence, the slow flow segment is connected with the first concave arc segment, and the rapid flow segment is connected with the second concave arc segment.

[0027] Further, the horizontal flow segment is provided with a flow outlet, and the flow outlet is provided with a blocking cover.

[0028] The first concave arc segment is connected with a first mounting plate, the second concave arc segment is connected with a second mounting plate, and the first mounting plate and the second mounting plate are connected to the inner wall of the tank body.

[0029] Further, a support plate is arranged between the first mounting plate and the second mounting plate, a second driving part is arranged on the support plate, a power output end of the second driving part is connected to the cover, and a second pressure sensor is arranged on the upper portion of the cover.

[0030] Further, an outlet gas pipeline that communicates with the tail gas absorption system is arranged at the outlet, a vacuum pump is connected to the outlet gas pipeline, and the inlet of the outlet gas pipeline communicates with the steady flow cavity.

[0031] Compared with the prior art, the liquid chlorine pressure relief tank has the following advantages:

[0032] The liquid chlorine pressure relief tank has the following advantages:

[0033] In addition, due to the above arrangement, the gas flow at the outlet of the pressure relief tank is more stable, the tail gas absorption system is provided with stable load, the normal operation of the tail gas absorption system is effectively ensured, the tail gas absorption system is prevented from being disabled due to excessive instantaneous load, the harm caused by liquid chlorine leakage accidents to personnel and the environment is significantly reduced, and the system operation energy consumption and maintenance cost are also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. In the drawings:

[0035] Figure 1 is a sectional view of the liquid chlorine pressure relief tank according to the embodiments of the present application;

[0036] Figure 2 is a perspective view of the flow guide assembly without the upper cover according to the embodiments of the present application;

[0037] Figure 3The sectional view schematic diagram of the flow guide assembly without the upper cover is shown in the embodiments of the utility model.

[0038] Figure 4 For Figure 3 The local enlarged view at I.

[0039] Explanation of reference signs:

[0040] 1, tank body;2, flow guide assembly;3, buffer assembly;4, first pressure sensor;5, first driving part;6, first mounting plate;7, second mounting plate;8, support plate;9, second driving part;10, second pressure sensor;11, air outlet pipeline;12, vacuum pump;13, access hole;

[0041] 101, inlet;102, outlet;103, air inlet cavity;104, release cavity;105, buffer cavity;106, steady flow cavity;

[0042] 201, shell;202, spiral plate;203, air inlet;204, air vent;205, flow guide channel;206, center tube;207, flow gap;208, elastic baffle;209, screen plate;

[0043] 301, cover body;302, air vent;303, flow guide plate;

[0044] 3011, convex arc segment;3012, first concave arc segment;3013, second concave arc segment;

[0045] 2061, flow channel;

[0046] 2091, flow hole;

[0047] 30111, slow flow segment;30112, level flow segment;30113, rapid flow segment;30114, discharge port;30115, cover. DETAILED DESCRIPTION

[0048] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0049] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0050] Moreover, in the description of the utility model, unless otherwise expressly limited, the terms "mounting", "connecting", "connection", "connecting piece" should be understood broadly. For example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be internal communication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with specific circumstances.

[0051] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0052] The utility model relates to a liquid chlorine pressure relief tank, as a whole, as shown in the drawing, Figure 1 The liquid chlorine pressure relief tank comprises a tank body 1 with a cavity, a flow guide assembly 2 connected in the tank body 1 and a buffer assembly 3 arranged below the flow guide assembly 2. The flow guide assembly 2 comprises a shell 201 abutting against the inner wall of the tank body 1, a spiral plate 202 arranged in the shell 201, an air inlet 203 for ventilation arranged above the shell 201 and a vent 204 arranged below the shell 201. The flow guide channel 205 is formed between the spiral plate 202 and the shell 201. The buffer assembly 3 comprises a cover 301 arranged below the flow guide channel 205, a convex arc segment 3011 arranged on the cover 301, a plurality of vent holes 302 arranged on the cover 301 for ventilation and the cover 301 abutting against the inner wall of the tank body 1. An inlet 101 is arranged above the tank body 1 and an outlet 102 is arranged below the tank body 1.

[0053] Through the above overall design, the liquid chlorine pressure relief tank of the utility model, by arranging the flow guide assembly 2, the chlorine gas with high pressure is introduced into the flow guide channel 205 between the spiral plate 202 and the shell 201 for drainage, so that its pressure is gradually buffered, at the same time, by arranging the cover 301 with the convex arc segment 3011 below the flow guide channel 205, the vent holes 302 are arranged on the cover 301, the chlorine gas flowing out of the flow guide channel 205 impacts on the cover 301 in the form of spiral flow, the chlorine gas flow is dispersed by the convex arc segment 3011 of the cover 301, the dispersed gas flow flows to the tank body 1 below through the vent holes 302 and flows to the external tail gas absorption system through the outlet 102. Through the arrangement of the flow guide assembly 2 and the buffer assembly 3, the impact force of the chlorine gas entering the pressure relief tank is effectively dispersed, the pressure is prevented from being too high instantaneously, and the safe operation of the pressure relief tank is ensured.

[0054] In addition, due to the above arrangement, the gas flow of the outlet 102 of the pressure relief tank is more stable, the stable load is provided for the tail gas absorption system, the normal operation of the tail gas absorption system is effectively ensured, the tail gas absorption system is prevented from failing due to the instantaneous excessive load, the harm caused by the liquid chlorine leakage accident to personnel and environment is significantly reduced, and the system operation energy consumption and maintenance cost are also reduced.

[0055] As an exemplary structure of the present embodiment, as shown in Figure 1 the tank body 1 adopts a cylindrical rotary structure, and the outer diameter of the cover body 301 is equal to the inner diameter of the tank body 1, which can be fixed by riveting in actual construction. As shown in Figure 1 In order to facilitate the placement of the buffer assembly 3 and the flow guide assembly 2 in the tank, an inspection opening 13 is arranged on the side of the tank body 1.

[0056] As a preferred embodiment, as shown in Figures 1 to 3 the center pipe 206 is arranged in the middle of the shell 201, the spiral plate 202 is connected between the center pipe 206 and the shell 201, and the flow-through gap 207 is arranged between the center pipe 206 and the vent port 204. The upper part of the shell 201 has an upper cover, and the vent port 204 is formed on the upper cover. The chlorine gas enters the flow guide channel 205 through the vent port 204, is guided by the spiral plate 202, and flows out through the flow-through gap 207.

[0057] Preferably, as shown in Figure 1 the air inlet cavity 103 is formed between the shell 201 and the upper part of the tank body 1, the release cavity 104 is formed in the center pipe 206, the buffer cavity 105 is formed between the cover body 301 and the shell 201, the steady flow cavity 106 is formed between the cover body 301 and the lower part of the shell 201, and the release cavity 104 is communicated with the buffer cavity 105. Through the arrangement of the tank body 1, the shell 201 and the cover body 301, the cavities in the tank body 1 form the air inlet cavity 103, the buffer cavity 105 and the steady flow cavity 106 from top to bottom, so that the chlorine gas pressure with high pressure is gradually released and reduced, and stable output is facilitated.

[0058] Further, as shown in Figures 1 to 4 the flow-through groove 2061 is arranged on the side wall of the center pipe 206, the flow-through groove 2061 is communicated with the flow guide channel 205 and the release cavity 104, and the elastic baffle 208 is further connected to the center pipe 206 and is arranged in the flow-through groove 2061. For the case of excessively high pressure, the flow-through groove 2061 and the elastic baffle 208 are arranged at the center pipe 206. When the gas is guided through the flow guide channel 205, the gas pressure is greater than the deformation force of the elastic baffle 208, the elastic baffle 208 is pressed and turned to the release cavity, so that the flow-through groove 2061 is opened, the gas can be released through the release cavity, and the safety risk caused by excessively high pressure in the flow guide channel 205 is avoided.

[0059] As shown in Figures 2 to 3As shown, the lower part of the shell 201 of the embodiment is tapered, so that the cross section of the flow guide channel 205 gradually decreases, so as to reduce the impact force of the gas flowing out of the flow gap 207, and improve the buffering effect. The flow channel 2061 is arranged in the flow guide channel 205, and a plurality of flow guide channels can be arranged at the guide interval of the spiral plate 202, so as to ensure the safe flow guide of the flow guide assembly 2. The flow channel 2061 of the embodiment is arranged as a rectangular groove.

[0060] In addition, as Figure 4 shown, the side of the flow channel 2061 close to the flow guide channel 205 is provided with a sieve plate 209, and the sieve plate 209 is provided with a plurality of through flow holes 2091. The sieve plate 209 is provided with a first pressure sensor 4 and a first driving part 5. When the gas pressure detected by the first pressure sensor 4 is higher than the set threshold value, the power output end of the first driving part 5 pushes one end of the elastic baffle 208 to move, and the flow guide channel 205 is communicated with the release cavity 104.

[0061] In order to achieve better pressure relief effect, as Figures 3 to 4 shown, the sieve plate 209 is buckled and connected at the flow channel 2061 of the center pipe 206, and the sieve plate 209 is fixed on the outside of the center pipe 206 by welding. The gas acts on the elastic baffle 208 through the flow hole 2091, and the first pressure sensor 4 is arranged on the sieve plate 209. The liquid chlorine pressure relief tank of the embodiment further comprises a controller, the first pressure sensor 4 is electrically connected with the controller, and the first driving part 5 is electrically connected with the controller.

[0062] As a specific embodiment, as Figure 4 shown, one end of the elastic baffle 208 is inserted into the wall of the center pipe 206, and the other end of the elastic baffle 208 abuts against the opposite end of the flow channel 2061. The first driving part 5 adopts a telescopic air cylinder, and the end of the piston rod of the telescopic air cylinder abuts against the elastic baffle 208. When the pressure monitored by the first pressure sensor 4 exceeds the threshold value, the first driving part 5 pushes the upper end of the elastic baffle 208 to move towards the release cavity 104. The stroke of the air cylinder can be set according to the size of the required opening degree, and the telescopic speed of the air cylinder can be adjusted to meet the demand of rapid release of gas, and further ensure the safety.

[0063] Preferably, as Figure 1 shown, the convex arc segment 3011 is provided with a first concave arc segment 3012 and a second concave arc segment 3013 on both sides thereof. The radii of the first concave arc segment 3012 and the second concave arc segment 3013 are not equal, and the air vent hole 302 is arranged to decrease downward from the convex arc segment 3011. By arranging the first concave arc segment 3012 and the second concave arc segment 3013 on both sides of the concave arc segment, the airflow is gradually dispersed along the convex arc segment 3011, and the formation of gas retention dead angle between the cover body 301 and the tank body 1 is avoided, and the airflow smoothness is improved.

[0064] Preferably, asFigure 1 As shown, the convex arc segment 3011 includes the slow flow segment 30111, the advection segment 30112, and the rapid flow segment 30113 connected in turn, the slow flow segment 30111 is connected with the first concave arc segment 3012, and the rapid flow segment 30113 is connected with the second concave arc segment 3013. The convex arc segment 3011 is the asymmetric slow flow segment 30111 and the stable segment, and the radii of the first concave arc segment 3012 and the second concave arc segment 3013 are not equal, so as to avoid causing resonance to cause the shaking of the pressure relief tank and effectively attenuate the propagation speed of the gas, thereby stabilizing the gas pressure. Secondly, the flow guide plate 303 is arranged on one side of the cover body 301 in the buffer cavity 105, and a plurality of flow guide plates 303 are arranged on the inner side of the cover body 301 along the circumferential direction of the middle part of the cover body 301, for guiding the gas flow of the vent hole 302 into the stable cavity, and further playing a role in attenuating the gas flow.

[0065] In addition, as shown in the drawings, Figure 1 The advection segment 30112 is provided with a flow outlet 30114, and the flow outlet 30114 is provided with a cover 30115 for plugging. The first concave arc segment 3012 is connected with the first mounting plate 6, and the second concave arc segment 3013 is connected with the second mounting plate 7. The first mounting plate 6 and the second mounting plate 7 are connected to the inner wall of the tank body 1.

[0066] Further, as shown in the drawings, Figure 1 The first mounting plate 6 and the second mounting plate 7 are provided with a support plate 8 therebetween, and the support plate 8 is provided with a second driving part 9. The power output end of the second driving part 9 is connected to the cover 30115, and the upper part of the cover 30115 is provided with a second pressure sensor 10. The second driving part 9 adopts a telescopic air cylinder, and the piston rod of the second driving part 9 is connected to the cover 30115. The second pressure sensor 10 is electrically connected to the controller, and the second driving part 9 is electrically connected to the controller. When the pressure monitored by the second pressure sensor 10 is greater than a preset threshold value, the second driving part 9 drives the cover 30115 to move downward, so that the flow outlet 30114 is opened, thereby avoiding the impact of the gas flow with large pressure on the cover body 301 to cause the vibration of the pressure relief tank, and ensuring the safety of the pressure relief tank.

[0067] The tank body 1 of the pressure relief tank is made of high-strength and corrosion-resistant material, and has sufficient pressure resistance and storage capacity. The design pressure is higher than the normal working pressure of the liquid chlorine warehouse, and can withstand the instantaneous pressure impact when the liquid chlorine leaks. The pressure relief tank is provided with independent safety accessories such as safety valve, pressure gauge, liquid level meter, etc., for real-time monitoring of the pressure, liquid level and other parameters in the tank.

[0068] As shown in the drawings, Figure 1As shown, the outlet 102 is provided with an outlet pipeline 11 communicating with the tail gas absorption system, a vacuum pump 12 is connected to the outlet pipeline 11, and the inlet of the outlet pipeline 11 communicates with the steady flow cavity 106. The outlet pipeline 11 is made of corrosion-resistant and pressure-resistant pipeline material, such as special alloy steel pipeline, to ensure long-term stable operation in the liquid chlorine corrosion environment. Various valves are installed on the pipeline, including emergency shut-off valve, check valve, regulating valve, etc. The emergency shut-off valve is used to quickly cut off the connection between the liquid chlorine tank and the pressure relief tank in the event of a leakage accident, to prevent the accident from expanding. The check valve ensures that the liquid chlorine can only flow from the liquid chlorine tank to the pressure relief tank, avoiding backflow. The regulating valve can adjust the leakage flow of the liquid chlorine according to the actual situation. The outside of the pressure relief tank of the embodiment is also provided with an alarm, which immediately starts to issue an audible and visual alarm signal to notify relevant personnel to handle in time once an abnormal situation is detected.

[0069] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid chlorine pressure relief tank characterized in that: comprising a tank body (1) with a cavity, a flow guide assembly (2) connected in the tank body (1), and a buffer assembly (3) arranged below the flow guide assembly (2); the flow guide assembly (2) comprises a shell (201) abutting the inner wall of the tank body (1), a spiral plate (202) arranged in the shell (201), an air inlet (203) for ventilation arranged above the shell (201), and a vent (204) arranged below the shell (201); a flow guide channel (205) is formed between the spiral plate (202) and the shell (201); the buffer assembly (3) comprises a cover body (301) arranged below the flow guide channel (205), a convex arc segment (3011) arranged on the cover body (301), a plurality of vent holes (302) for ventilation arranged on the cover body (301), and the cover body (301) abutting the inner wall of the tank body (1); an inlet (101) is arranged above the tank body (1), and an outlet (102) is arranged below the tank body (1).

2. The liquid chlorine pressure relief tank according to claim 1, characterized in that: a central pipe (206) is arranged in the middle of the shell (201), and the spiral plate (202) is connected between the central pipe (206) and the shell (201); and a flow gap (207) is formed between the central pipe (206) and the vent (204).

3. The liquid chlorine pressure relief tank according to claim 2, characterized in that: an air inlet cavity (103) is formed between the shell (201) and the upper part of the tank body (1), and a release cavity (104) is formed in the central pipe (206); a buffer cavity (105) is formed between the cover body (301) and the shell (201); a flow stabilizing cavity (106) is formed between the cover body (301) and the lower part of the shell (201); and the release cavity (104) communicates with the buffer cavity (105).

4. The liquid chlorine pressure relief tank according to claim 3, characterized in that: a flow channel (2061) is arranged on the side wall of the central pipe (206); the flow channel (2061) communicates the flow guide channel (205) and the release cavity (104); and an elastic baffle (208) is further connected to the central pipe (206), and the elastic baffle (208) is arranged in the flow channel (2061).

5. The liquid chlorine pressure relief tank according to claim 4, characterized in that: a sieve plate (209) is arranged on the side of the flow channel (2061) close to the flow guide channel (205), and a plurality of flow holes (2091) are arranged on the sieve plate (209); a first pressure sensor (4) and a first driving part (5) are arranged on the sieve plate (209); when the air pressure detected by the first pressure sensor (4) is higher than a set threshold value, the power output end of the first driving part (5) pushes one end of the elastic baffle (208) to move, and the flow guide channel (205) communicates with the release cavity (104). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The liquid chlorine pressure relief tank according to claim 5, characterized in that: The convex arc segment (3011) is provided with a first concave arc segment (3012) and a second concave arc segment (3013) on both sides respectively; The radii of the first concave arc segment (3012) and the second concave arc segment (3013) are not equal; the vent hole (302) is arranged downwardly from the convex arc segment (3011).

7. The liquid chlorine pressure relief tank according to claim 6, characterized in that: The convex arc segment (3011) comprises a slow flow segment (30111), a horizontal flow segment (30112) and a rapid flow segment (30113) connected in sequence, the slow flow segment (30111) is connected with the first concave arc segment (3012), and the rapid flow segment (30113) is connected with the second concave arc segment (3013).

8. The liquid chlorine pressure relief tank according to claim 7, characterized in that: The horizontal flow segment (30112) is provided with a flow discharge port (30114), and the flow discharge port (30114) is provided with a cover (30115) for plugging; The first concave arc segment (3012) is connected with a first mounting plate (6), the second concave arc segment (3013) is connected with a second mounting plate (7), and the first mounting plate (6) and the second mounting plate (7) are connected to the inner wall of the tank body (1).

9. The liquid chlorine pressure relief tank according to claim 8, characterized in that: The first mounting plate (6) and the second mounting plate (7) are provided with a support plate (8) therebetween, the support plate (8) is provided with a second driving portion (9), a power output end of the second driving portion (9) is connected to the cover (30115), and the cover (30115) is provided with a second pressure sensor (10) at an upper portion.

10. The liquid chlorine pressure relief tank according to claim 9, characterized in that: A gas outlet pipeline (11) in communication with a tail gas absorption system is arranged below the tank body (1), a vacuum pump (12) is connected to the gas outlet pipeline (11), and an inlet of the gas outlet pipeline (11) is communicated to the flow stabilizing cavity (106).

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