Hydrogen safe venting device

Abstract

The utility model relates to hydrogen emptying device technical field discloses a hydrogen safety emptying device, and the hydrogen safety emptying device includes hydrogen distribution platform and water seal tank. The hydrogen safety emptying device, first cooperation hydrogen distribution platform, water seal tank, hydrogen import pipe, hydrogen outlet pipe, hydrogen user pipe, hydrogen water seal groove inlet pipe, first instrument switch valve, second instrument switch valve, first control valve, second control valve and pressure gauge, so that emptying hydrogen enters the inside of the air inlet pipe on water seal tank, enlarges gas flow area through loudspeaker mouth, and the preliminary reduction flow rate, and the sawtooth structure can divide the gas stream into multiple thin streams, and the hydrogen emptying safety is increased, and cooperation inlet pipe, overflow pipe, from nitrogen pipe and hot water companion pipe, increase nitrogen and hydrogen mixing time and space, thereby increase the safety of hydrogen emptying, and the hydrogen pressure stability can be guaranteed, and the safety of hydrogen emptying is increased in turn.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen venting devices, specifically a safe hydrogen venting device. Background Technology

[0002] Hydrogen produced by electrolysis in existing caustic soda plants is generally treated and then sent to multiple downstream user points for use (e.g., as a raw material for hydrogen chloride synthesis, as fuel in boiler rooms, as a raw material for hydrogenation units, etc.). If downstream users reduce their hydrogen consumption or unexpectedly shut down, electrolysis is required to reduce the production load, resulting in reduced production of the caustic soda plant. In order to ensure that the caustic soda plant operates at full capacity, excess hydrogen is generally vented.

[0003] However, the existing hydrogen water seal venting device has the following shortcomings: When a downstream hydrogen user shuts down in an emergency, the hydrogen shut-off valve closes, causing the main hydrogen pipeline pressure to rise, which can easily lead to pressure fluctuations in the main hydrogen pipeline. When the fluctuation range is large, it can easily cause the entire caustic soda unit to shut down. At this time, the instantaneous release of hydrogen pressure is relatively large, which will form large bubbles in the water seal tank, causing violent fluctuations in the liquid surface and pressure pulsation. In addition, the hydrogen cannot be completely wetted, and the release of dry hydrogen increases the danger. If the hydrogen venting pipeline catches fire in an accident (such as a lightning strike), the caustic soda unit needs to reduce its load or even shut down to extinguish the fire.

[0004] By adding an interlock control loop and improving the structure of the water seal tank inlet pipe, the pressure fluctuation of the main pipe during hydrogen venting is reduced; by improving the structure of the water seal tank inlet pipe, the bubble diameter is reduced to uniformly disperse the gas and increase the amount of hydrogen wetting; however, the addition of steam is not used to safely extinguish the fire without affecting caustic soda production, thus failing to both ensure stable hydrogen pressure and increase the safety of hydrogen venting. Therefore, we propose a hydrogen safety venting device. Utility Model Content

[0005] The purpose of this invention is to provide a safe hydrogen venting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A hydrogen safety venting device includes a hydrogen distribution platform and a water seal tank. The hydrogen distribution platform is equipped with a hydrogen inlet pipe and multiple hydrogen outlet pipes. The hydrogen inlet pipe is used to transport hydrogen produced upstream. A hydrogen user pipe is connected downstream of the hydrogen outlet pipes. A branch of the hydrogen user pipe connects to the inlet pipe of a hydrogen water seal tank. The inlet pipe of the hydrogen water seal tank is connected downstream to an inlet pipe. The inlet pipe is fixedly installed inside the center of the water seal tank. A first instrument switch valve and a first control valve are installed on the hydrogen user pipe. A second instrument switch valve and a second control valve are installed on the branch of the hydrogen pipeline. The opening degrees of the first and second control valves are always consistent and are simultaneously adjusted and controlled by a pressure gauge. The first and second instrument switch valves are interlocked in one direction: when the first instrument switch valve is open, the second instrument switch valve is closed; when the first instrument switch valve is closed, the second instrument switch valve is open.

[0008] The air inlet pipe is inserted below the liquid level inside the water seal tank. The bottom of the air inlet pipe is widened by a flared opening. A straight pipe is fixedly connected to the bottom of the flared opening. The bottom edge of the straight pipe is provided with a serrated structure. An air outlet is provided on the water seal tank. The air outlet is connected to a steam pipeline and a flame arrester. A steam valve is provided on the steam pipeline.

[0009] The water seal tank is also equipped with a water inlet pipe, an overflow pipe, a nitrogen gas pipe, and a hot water tracing pipe.

[0010] In a further embodiment, the serrated structure has an isosceles triangle vertical cross-section, which further refines the bubbles, allowing them to enter the liquid seal layer more evenly, thereby stabilizing gas output and releasing the gas in the form of smaller and more uniform bubbles.

[0011] In a further embodiment, the water seal tank is provided with a spare port, and the spare port is provided with a corresponding end cap, so as to better replace the water seal tank when a certain port is damaged.

[0012] In a further embodiment, a lifting lug is fixedly installed on the top of the water seal tank, and multiple lifting lugs are provided to better lift and transport the water seal tank.

[0013] In a further embodiment, a sight glass made of transparent glass is provided at the top of the water seal tank to allow for better observation of the interior of the water seal tank.

[0014] In a further embodiment, a manhole is provided at the top of the water seal tank, and a corresponding cover is hinged to one end of the manhole, with the other end of the cover fixed to the manhole.

[0015] In a further embodiment, a ladder platform is fixedly installed on the outside of the water seal tank to facilitate easier access to the interior of the water seal tank for inspection and cleaning.

[0016] Compared with the prior art, this utility model provides a hydrogen safety venting device, which has the following beneficial effects:

[0017] 1. This hydrogen safety venting device, in order to ensure both stable hydrogen pressure and increased safety during hydrogen venting, automatically adjusts the opening of the first control valve based on downstream hydrogen consumption during normal system operation. Simultaneously, it ensures the opening of the second control valve remains consistent with the first. When the downstream system unexpectedly shuts down, the first instrument valve is interlocked shut off, while the second instrument valve is simultaneously interlocked open. This stops downstream hydrogen consumption, and excess hydrogen enters the hydrogen water seal tank inlet pipe through a branch of the hydrogen pipeline. This allows the vented hydrogen to enter the inlet pipe on the water seal tank. Because the opening of the second control valve is always consistent with the first control valve, and the seamless switching prevents pressure fluctuations in the main hydrogen pipeline, the flared outlet expands the gas flow area, initially reducing the flow velocity. The serrated structure further refines the gas flow into multiple fine streams, further refining the bubbles. This allows the gas to enter the liquid seal layer more evenly, thus stabilizing the venting. The gas is released in the form of finer and more uniform bubbles, reducing the impact on the liquid surface and pressure fluctuations. It also increases the gas-liquid contact area, improves the humidity of the vented hydrogen, and enhances the safety of hydrogen venting. In conjunction with the water inlet pipe, overflow pipe, nitrogen pipe, and hot water tracing pipe, it increases the mixing time and space between nitrogen and hydrogen, thereby increasing the safety of hydrogen venting. If the hydrogen venting pipeline catches fire in an accident (such as a lightning strike), it can effectively prevent backfire when used with a flame arrestor. Furthermore, the fire can be quickly extinguished by remotely opening the steam valve on the steam pipeline, without needing to reduce the load or shut down the caustic soda unit to extinguish the fire. If the downstream hydrogen pressure fluctuates greatly, it can easily cause the entire caustic soda unit to shut down. In summary, this ensures stable hydrogen pressure and increases the safety of hydrogen venting.

[0018] 2. In order to improve the practicality of the hydrogen safety venting device, this device can be equipped with a spare port for easy replacement when a port on the water seal tank is damaged, with lifting lugs for easier hoisting and transport of the water seal tank, with a sight glass for better observation of the inside of the water seal tank, and with a manhole and ladder platform for easier access to the inside of the water seal tank for inspection and cleaning. In summary, this improves the practicality of the venting device. Attached Figure Description

[0019] Figure 1 This is a cross-sectional front view of the water seal tank and part of the structure of this utility model;

[0020] Figure 2 This is a top view schematic diagram of the water seal tank and part of the structure of this utility model;

[0021] Figure 3 This is a flowchart illustrating the overall process of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram of region A in the middle;

[0023] Figure 5 This utility model Figure 3 Enlarged structural diagram of region B in the middle;

[0024] Figure 6 This utility model Figure 3 Enlarged structural diagram of region C in the middle;

[0025] Figure 7 This utility model Figure 3 A magnified schematic diagram of the D region.

[0026] Explanation of icon numbers:

[0027] 1. Hydrogen distribution platform; 2. Water seal tank; 3. Hydrogen inlet pipe; 4. Hydrogen outlet pipe; 5. Hydrogen user pipe; 6. Hydrogen water seal tank inlet pipe; 7. First instrument switch valve; 8. Second instrument switch valve; 9. First control valve; 10. Second control valve; 11. Pressure gauge; 12. Gas inlet pipe; 13. Gas outlet; 14. Trumpet mouth; 15. Straight pipe; 16. Serrated structure; 17. Steam pipeline; 18. Spare port; 19. Water inlet pipe; 20. Overflow pipe; 21. Nitrogen pipeline; 22. Hot water tracing pipe; 23. Lifting lug; 24. Sight glass; 25. Manhole; 26. Ladder platform; 27. Steam valve; 28. Flame arrester. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0030] Please see Figures 1-7 This utility model provides a technical solution:

[0031] A hydrogen safety venting device includes a hydrogen distribution platform 1 and a water seal tank 2. The hydrogen distribution platform 1 is equipped with a hydrogen inlet pipe 3 and three hydrogen outlet pipes 4. The hydrogen inlet pipe 3 is used to transport hydrogen produced upstream. The downstream of each of the two hydrogen outlet pipes 4 is connected to a hydrogen user pipe 5. The hydrogen user pipe 5 is connected to the hydrogen water seal tank inlet pipe 6 through a hydrogen pipeline branch. The downstream of the hydrogen water seal tank inlet pipe 6 is connected to the inside of the inlet pipe 12. The inlet pipe 12 is fixedly installed inside the center of the water seal tank 2.

[0032] In one embodiment of this utility model, a first instrument switch valve 7 and a first control valve 9 are provided on the hydrogen user pipeline 5, and a second instrument switch valve 8 and a second control valve 10 are provided on the hydrogen pipeline branch. The opening degree of the first control valve 9 and the second control valve 10 is always the same and is simultaneously adjusted and controlled by the pressure gauge 11. The first instrument switch valve 7 and the second instrument switch valve 8 are interlocked in the opening direction, that is, when the first instrument switch valve 7 is open, the second instrument switch valve 8 is closed, and when the first instrument switch valve 7 is closed, the second instrument switch valve 8 is open. The air inlet pipe 12 is inserted below the liquid level inside the water seal tank 2, and the bottom of the air inlet pipe 12 is connected by a horn. The bell mouth 14 is enlarged, and a straight pipe 15 is fixedly connected to the bottom of the bell mouth 14. The bottom edge of the straight pipe 15 is provided with a serrated structure 16. In addition, the vertical cross section of the serrated structure 16 is an isosceles triangle with a base of 10mm and a height of 20mm, which further refines the bubbles and makes them enter the liquid seal layer more evenly, thereby stabilizing the gas output. The gas is released in the form of smaller and more uniform bubbles. The water seal tank 2 is provided with a gas outlet 13, which is connected to a steam pipeline 17 and a flame arrester 28. A steam valve 27 is provided on the steam pipeline 17. The water seal tank 2 is also provided with a water inlet pipe 19, an overflow pipe 20, a nitrogen pipeline 21, and a hot water tracing pipe 22.

[0033] In this embodiment, upstream produced hydrogen is transported to hydrogen distribution station 1 via hydrogen inlet pipe 3. Hydrogen distribution station 1 distributes the hydrogen through three hydrogen outlet pipes 4, two of which are connected downstream to hydrogen user pipes 5 to supply hydrogen to downstream users. During this process, pressure gauge 11 automatically adjusts the opening of the first control valve 9 according to the downstream hydrogen consumption, while simultaneously controlling the opening of the second control valve 10 to remain consistent with the first control valve 9, ensuring that the hydrogen supply meets downstream demand and maintaining stable pressure in the main hydrogen pipe. At this time, the first instrument switch valve 7 is in the open state, and the second instrument switch valve 8 is in the closed state, indicating normal hydrogen supply. Hydrogen is supplied downstream via user pipe 5. In the event of an unexpected downstream shutdown, the system interlocks to close the first instrument switch valve 7 and simultaneously interlocks to open the second instrument switch valve 8, stopping downstream hydrogen supply. Excess hydrogen enters the hydrogen water seal tank inlet pipe 6 via a branch line on user pipe 5, and then enters the inlet pipe 12 on the water seal tank 2. Because the opening of the second control valve 10 is always consistent with the first control valve 9, this seamless switching process does not cause pressure fluctuations in the main hydrogen pipe. The hydrogen entering the inlet pipe 12, under the action of the bell mouth 14, expands the gas flow area and initially reduces the flow velocity. Subsequently, the hydrogen flows through the bottom of the straight pipe 15. The serrated structure 16 at the edge of the tank divides the gas stream into multiple fine streams, further refining the bubbles and allowing hydrogen to enter the liquid seal layer inside the water seal tank 2 more evenly, achieving stable gas release. During this process, hydrogen is released in the form of finer and more uniform bubbles, reducing the impact on the liquid surface and pressure fluctuations. At the same time, it increases the gas-liquid contact area, improves the humidity of the released hydrogen, and enhances the safety of hydrogen venting. The water inlet pipe 19 on the water seal tank 2 is used to replenish the liquid required for the liquid seal, the overflow pipe 20 ensures the stability of the liquid seal level, nitrogen is introduced from the nitrogen pipe 21, and the hot water tracing pipe 22 maintains a suitable temperature. The three work together to increase the mixing time of nitrogen and hydrogen. In addition to the space, the safety of hydrogen venting is further improved. If the hydrogen venting pipeline catches fire in an accident (such as a lightning strike), the flame arrester 28 can effectively prevent backfire. At the same time, the steam valve 27 on the steam pipeline 17 can be opened remotely, and steam can be delivered to the ignition point through the steam pipeline 17 to extinguish the fire quickly without reducing the load of the caustic soda unit or shutting down the unit for fire extinguishing. This avoids the shutdown of the entire caustic soda unit due to large fluctuations in downstream hydrogen pressure. Ultimately, this solves the problem of the impact of unexpected changes in hydrogen consumption by multiple downstream users on the upstream electrolysis production load, ensures the stability of upstream hydrogen pressure, prevents upstream production reduction or shutdown, and achieves the goal of both ensuring stable hydrogen pressure and increasing the safety of hydrogen venting.

[0034] In one embodiment of this utility model, the water seal tank 2 is provided with a spare port 18, and the spare port 18 is provided with a corresponding end cap, so as to better replace a port on the water seal tank 2 when it is damaged. In addition, two lifting lugs 23 are fixedly installed on the top of the water seal tank 2, so as to better lift and transport the water seal tank 2. In addition, a sight glass 24 is provided on the top of the water seal tank 2. The sight glass 24 is made of transparent glass, so as to better observe the inside of the water seal tank 2. In addition, a manhole 25 is provided on the top of the water seal tank 2. One end of the manhole 25 is hinged to the manhole 25, and the other end of the manhole 25 is fixed to the manhole 25. In addition, a ladder platform 26 is fixedly installed on the outside of the water seal tank 2, so as to better climb up and enter the inside of the water seal tank 2 for inspection and cleaning.

[0035] In this embodiment, a spare port 18 is provided on the water seal tank 2, and the spare port 18 is equipped with a corresponding end cap. When other ports on the water seal tank 2 are damaged, the spare port 18 can be used for replacement to ensure the continuous normal operation of the device. Two lifting lugs 23 are fixedly installed on the top of the water seal tank 2. During the installation, maintenance or position adjustment of the water seal tank 2, the water seal tank 2 can be easily lifted and transported through the lifting lugs 23. A sight glass 24 is provided on the top of the water seal tank 2. The sight glass 24 is made of transparent glass, and the operator can directly observe the water seal tank through the sight glass 24. 2. The internal liquid level, bubble status, and other conditions are monitored to promptly understand the internal operating status of the device, facilitating the detection and handling of abnormalities. A manhole 25 is installed at the top of the water seal tank 2, with a corresponding cover hinged to the manhole 25. At the same time, a ladder platform 26 is fixedly installed on the outside of the water seal tank 2. When it is necessary to inspect and clean the inside of the water seal tank 2, the operator can climb up through the ladder platform 26, open the cover of the manhole 25, and enter the water seal tank 2 to carry out the work, improving the convenience and safety of inspection and cleaning, and thus better improving the practicality of the venting device.

[0036] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as flanges and welding that are mature in the prior art. In addition, the standard parts are all conventional models in the prior art. The circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0037] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A hydrogen safety venting device, comprising a hydrogen distribution platform (1) and a water seal tank (2), characterized in that: The hydrogen distribution platform (1) is equipped with a hydrogen inlet pipe (3) and multiple hydrogen outlet pipes (4). The hydrogen inlet pipe (3) is used to transport hydrogen produced upstream. The downstream of the hydrogen outlet pipe (4) is connected to a hydrogen user pipe (5). The hydrogen user pipe (5) is connected to the hydrogen water seal tank inlet pipe (6) through a branch of the hydrogen pipeline. The downstream of the hydrogen water seal tank inlet pipe (6) is connected to the inside of the inlet pipe (12). The inlet pipe (12) is fixedly installed inside the center of the water seal tank (2). The hydrogen user pipe (5) is equipped with a first instrument. The hydrogen pipeline branch is provided with a second instrument switch valve (8) and a second control valve (10). The opening degree of the first control valve (9) and the second control valve (10) is always consistent and is simultaneously adjusted and controlled by the pressure gauge (11). The first instrument switch valve (7) and the second instrument switch valve (8) are interlocked to open in the same direction. That is, when the first instrument switch valve (7) is open, the second instrument switch valve (8) is closed, and when the first instrument switch valve (7) is closed, the second instrument switch valve (8) is open. The air inlet pipe (12) is inserted below the liquid level inside the water seal tank (2). The bottom of the air inlet pipe (12) is enlarged through a bell mouth (14). A straight pipe (15) is fixedly connected to the bottom of the bell mouth (14). The bottom edge of the straight pipe (15) is provided with a serrated structure (16). An air outlet (13) is provided on the water seal tank (2). The air outlet (13) is connected to a steam pipeline (17) and a flame arrester (28). A steam valve (27) is provided on the steam pipeline (17). The water seal tank (2) is also equipped with a water inlet pipe (19), an overflow pipe (20), a nitrogen pipe (21), and a hot water tracing pipe (22).

2. The hydrogen safety venting device according to claim 1, characterized in that: The vertical cross section of the sawtooth structure (16) is an isosceles triangle.

3. The hydrogen safety venting device according to claim 1, characterized in that: The water seal tank (2) is provided with a spare port (18), and the spare port (18) is provided with a corresponding end cap.

4. The hydrogen safety venting device according to claim 1, characterized in that: The top of the water seal tank (2) is fixedly equipped with a lifting lug (23), and there are multiple lifting lugs (23).

5. The hydrogen safety venting device according to claim 1, characterized in that: The top of the water seal tank (2) is provided with a sight glass (24), which is made of transparent glass.

6. The hydrogen safety venting device according to claim 1, characterized in that: The top of the water seal tank (2) is provided with a manhole (25), and a corresponding hole cover is hinged to one end of the manhole (25), and the other end of the hole cover is fixed to the manhole (25).

7. The hydrogen safety venting device according to claim 1, characterized in that: The water seal tank (2) is externally fixed with a ladder platform (26).

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