A water sealing device and a water sealing method for drainage of hydrogen production equipment

Abstract

The present invention relates to a water seal device and a water seal method for draining water from a hydrogen production device, and relates to the technical field of hydrogen preparation. The water seal device comprises an outer tube arranged vertically and an inner tube arranged vertically inside the outer tube, the bottom and top ends of the outer tube and the inner tube are closed; a gas-liquid inlet pipe passes through the outer tube and extends into the inner tube, the direction of the terminal pipeline is upward, and the side wall of the gas-liquid inlet pipe located in the inner tube is provided with a plurality of discharge holes; a plurality of vertically arranged impellers are provided above the gas-liquid inlet pipe in the inner tube, and a plurality of through overflow holes are provided on the side wall of the inner tube above the impeller; the outer tube is connected to the overflow pipe, and the terminal opening height of the overflow pipe is lower than the overflow hole. The gas-water mixture discharged from the hydrogen production device first accumulates in the inner tube, so that the liquid level in the inner tube gradually rises and overflows to the outer tube, and then accumulates in the cavity between the outer tube and the inner tube, so that the liquid level in the outer tube gradually rises and overflows through the overflow pipe. After the hydrogen achieves gas-water separation in the inner tube, it accumulates near the exhaust port to prevent the hydrogen from accumulating in the sewer.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen preparation, and in particular relates to a separation technology of residual hydrogen and waste water, and specifically relates to a water sealing device and a water sealing method for drainage of hydrogen production equipment. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] Hydrogen energy has become an important direction for global industrial development due to its advantages such as abundant sources and strong adaptability. At present, hydrogen is mainly produced by electrolysis of water. During the hydrogen production process, water is decomposed on the electrode to produce hydrogen and oxygen. The produced hydrogen is mixed with water vapor and transported along the process pipeline. During the process, the water vapor is separated and liquid water is produced as wastewater or unqualified water detected and discharged into the sewer. Because hydrogen molecules are relatively small, they can enter through extremely small gaps and fill the gaps in the wastewater. Therefore, a certain amount of residual hydrogen will be mixed in the flowing wastewater to form a gas-water mixture.

[0004] In order to prevent residual hydrogen from accumulating in the drainage pipeline and causing safety hazards, it is necessary to set a water seal on the drainage pipeline and separate, collect and treat the residual hydrogen. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a water seal device and a water seal method for drainage of hydrogen production equipment, wherein the inner tube realizes gas-water separation, and the outer tube is connected to the overflow pipe to establish a water seal liquid level, thereby preventing hydrogen from entering the sewer.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] In a first aspect, a water seal device for draining water from a hydrogen production device comprises a vertically arranged outer tube and an inner tube vertically arranged inside the outer tube, wherein the bottom ends and top ends of the outer tube and the inner tube are sealed;

[0008] The gas-liquid inlet pipe passes through the outer pipe and extends into the inner pipe, the end pipe is directed upward, and a plurality of discharge holes are arranged on the side wall of the gas-liquid inlet pipe in the inner pipe;

[0009] A plurality of vertically arranged impellers are arranged above the gas-liquid inlet pipe in the inner tube, and a plurality of through overflow holes are arranged on the inner tube side wall above the impeller; the outer tube is connected to the overflow pipe, and the end opening height of the overflow pipe is lower than the overflow hole.

[0010] Optionally, an exhaust port is provided at the top of the outer tube outside the inner tube, and the exhaust port is connected to the vent pipe of the hydrogen production equipment, which is used to discharge the hydrogen concentrated on the upper part of the outer tube, maintain the air pressure in the water seal device stable, and prevent excessive internal hydrogen, which will overcome the atmospheric pressure and press all the waste water in the outer tube out of the overflow pipe.

[0011] Optionally, a vertical impeller shaft is provided in the inner tube, and the impeller is connected to the impeller shaft. Since the rotation axis of the impeller is vertical, the rotation direction of the impeller is perpendicular to the upward direction of the gas-water mixture, which can achieve a disturbance effect.

[0012] Optionally, the impeller shaft is connected to the top plate of the inner tube via a bearing. At this time, all the impellers and the impeller shaft form a whole that performs rotational motion, and the rotation angular velocity of all the impellers is the same, requiring a gas-water mixture with a larger flow rate to drive; or, the impeller shaft is fixed between the top plate of the inner tube and the gas-liquid inlet pipe, and multiple impellers are connected to the impeller shaft via bearings. At this time, the rotation angular velocities of each impeller in the upper and lower parts can be different, which is consistent with the state in which the movement state of the gas-water mixture is gradually changed by the impellers arranged from bottom to top during the upwelling process.

[0013] Optionally, the impeller includes a plurality of radially arranged water-beating fins, with gaps connecting the upper and lower parts between adjacent water-beating fins. The water-beating fins are impacted by the gas-water mixture to cause the impeller to rotate, and the reaction of the water-beating fins to the gas-water mixture causes the gas-water mixture to rotate during the upwelling process, thereby causing light hydrogen bubbles to gather and promoting gas-water separation.

[0014] Optionally, the outer tube is connected to a water inlet pipe, which is used to add water to the outer tube. The liquid level can be established in the outer tube when the water seal device is first activated to prevent hydrogen from entering the sewer through an overflow pipe with no liquid level. The hydrogen accumulated above the outer tube can also be pressed out of the exhaust port by adding water.

[0015] Optionally, the overflow pipe includes a vertically upward riser, which is fixed to the outside of the outer pipe through an overflow pipe rack. A downward bent pipe is arranged at the end of the riser. The connecting position between the bent pipe and the outer pipe is located at the lower part of the outer pipe, flush with the water inlet pipe. When the gas-water mixture is continuously replenished in the inner pipe, since the liquid level has been established in the outer pipe and the overflow pipe, the amount of hydrogen in the water seal device can be kept stable when the exhaust port is normally open, thereby making the hydrogen pressure at the exhaust port relatively stable.

[0016] In a second aspect, a water sealing method using the water sealing device for draining water from a hydrogen production equipment comprises the following process:

[0017] The gas-water mixture containing hydrogen enters the inner tube along the gas-liquid inlet pipe, and the impeller is driven to rotate by the upward flowing wastewater, which promotes the separation of gas and water. The liquid level in the inner tube gradually rises to the overflow hole, and the wastewater is discharged between the inner tube and the outer tube through the overflow hole, and then enters the overflow pipe, establishing the liquid level in the overflow pipe and the outer tube to realize water seal.

[0018] Optionally, the separated hydrogen is discharged through an exhaust port and treated together with other waste gases generated by the hydrogen production equipment.

[0019] Optionally, the liquid level in the outer tube is adjusted through the water inlet pipe to re-establish the liquid level in the outer tube when the device is activated or the flow rate of the gas-water mixture changes too much.

[0020] The beneficial effects of the present invention are:

[0021] The water seal device provided by the present invention includes an inner tube and an outer tube. The gas-water mixture containing hydrogen discharged from the hydrogen production equipment is first accumulated in the inner tube, so that the liquid level in the inner tube gradually rises and overflows to the outer tube, and then accumulates in the cavity between the outer tube and the inner tube, so that the liquid level in the outer tube gradually rises and overflows through the overflow pipe. Since the opening of the gas-liquid inlet pipe is located in the pipeline in an upward direction, hydrogen floats upward under the action of buoyancy, which is the same as the flow direction of wastewater, so it can promote the discharge of hydrogen from the pipeline and avoid the accumulation of hydrogen in the gas-liquid inlet pipe. Since the opening of the gas-liquid inlet pipe is submerged below the liquid level of the inner tube, on the one hand, it can be avoided that the wastewater of gas-liquid confluence is directly discharged outdoors without separation. On the other hand, under the action of the water pressure and water seal of the inner tube, it can be avoided that sparks or static electricity from the outside enter the interior of the equipment, which plays the role of a flame arrester. After the hydrogen achieves gas-water separation in the inner tube, it accumulates near the exhaust port. After the overflow, the wastewater establishes a liquid level in the outer tube. At this time, the hydrogen above the sewer and the outer tube is separated by the liquid level established by the outer tube and the overflow pipe, making it difficult for hydrogen to pass through the overflow pipe. Hydrogen can be effectively collected for centralized treatment to prevent hydrogen from accumulating in the sewer. The structure of the impeller is divided into bearings, impeller tube supports, water-beating wings, impeller rods and other parts. The main function of the bearing is to make the impeller rotate under the action of water and air to minimize the rotation resistance; the impeller tube support is pointed to assist the impeller to rotate, and the impeller rod is responsible for supporting the water-beating wings. The water-beating wings are arranged in a spiral shape and tilted at a set angle in the impeller. Due to the low density of hydrogen in the gas-water mixture, it moves from bottom to top with water vapor. When it encounters the impeller, it promotes the rotation of the impeller under the action of pressure. During the rotation, the gas-water mixture is dispersed, thereby further increasing the effect of gas-water separation, causing further separation, and avoiding residual hydrogen molecules from being left in the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of the water seal device used for draining water from the hydrogen production equipment in Example 1.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure from the perspective of the middle BB.

[0025] Figure 3 This is a schematic diagram of the structure of the impeller used for draining water from the hydrogen production equipment in Example 1.

[0026] Among them, 1. outer tube; 2. inner tube; 3. gas-liquid inlet pipe; 4. discharge hole; 5. impeller; 6. overflow hole; 7. overflow pipe; 8. exhaust port; 9. impeller shaft; 10. bearing; 11. water inlet pipe; 12. outer tube bottom plate; 21. inner tube bottom plate; 31. water-gas mixture discharge port; 51. water fin; 71. overflow pipe rack. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Example 1

[0030] The hydrogen generated by the hydrogen production equipment contains a small amount of water vapor, which needs to be separated during the hydrogen purification process. The wastewater formed by the separated water vapor contains a small amount of hydrogen bubbles, which become a gas-water mixture. In the hydrogen production equipment, the gas-water mixture is transported in a horizontal direction to prevent the accumulation of hydrogen bubbles in the pipeline. Due to the need for equipment operation efficiency, the flow rate of the gas-water mixture is about 8m / s, in which the size of the mixed hydrogen bubbles is about 135nm, and the flow rate of hydrogen discharged with the wastewater is about 500mL / time (intermittent exhaust). When the hydrogen production equipment is draining water, the water is mixed with hydrogen, which is nano-scale. According to the relevant standards of the hydrogen production station, hydrogen is not allowed to enter the drain pipe. Nano-scale bubbles are mixed in the wastewater, and their buoyancy is weak. They can exist in a relatively stable state for a certain period of time. The gas-water mixture flow rate of this equipment during operation is extremely fast, making it easier for nano-scale bubbles to move in the direction of wastewater flow, further weakening the buoyancy of nano-scale bubbles, bringing difficulties to gas-water separation, and thus it is difficult to spontaneously complete the gas-water separation process in the container. In order to prevent the hydrogen mixed in the gas-water mixture from accumulating in the sewer to form a safety hazard, a water seal device with a gas-liquid separation function needs to be installed on the wastewater discharge pipeline. By using the inventive scheme in this embodiment, the hydrogen in the nano-scale bubbles can be completely separated from the water, and then collected and processed in a centralized manner to avoid the risk of being discharged into the drain pipe.

[0031] A water seal device for draining water from a hydrogen production device, such as Figure 1As shown, it includes a vertically arranged outer tube 1 and an inner tube 2 vertically arranged inside the outer tube 1, the bottom ends of the outer tube 1 and the inner tube 2 are closed, so that the bottoms of the outer tube 1 and the inner tube 2 are not connected; the gas-liquid inlet pipe 3 passes through the outer tube 1 and extends into the inner tube 2, and the direction of its terminal pipeline is upward, and the side wall of the gas-liquid inlet pipe 3 located in the inner tube 2 is provided with a plurality of discharge holes 4, and the discharge holes 4 are evenly arranged on the side wall of the terminal of the gas-liquid inlet pipe 3, and the arrangement method is that three discharge holes 4 arranged circumferentially along the side wall of the gas-liquid inlet pipe 3 form a row, and five rows of discharge holes 4 are arranged from top to bottom, which are used to output the gas-water mixture from the side. Since the flow direction of the gas-water mixture is changed from the axial direction of the inner tube 2 to the radial direction, and then floats up along the axial direction, the hydrogen bubbles contained in the gas-water mixture can be caused to converge by the change of the flow direction; the aperture of the discharge hole 4 is to ensure that the hydrogen On the premise that the gas can be separated smoothly, the smaller the better. The diameter of the discharge hole 4 of this embodiment is 1-2mm; eight vertically arranged impellers 5 are arranged above the gas-liquid inlet pipe 3 in the inner tube 2, and a plurality of through overflow holes 6 are arranged on the side wall of the inner tube 2 above the impeller 5. Four overflow holes 6 arranged circumferentially along the side wall of the inner tube 2 form a row, and fifteen rows of overflow holes 6 are arranged from top to bottom, which are used to evenly distribute hydrogen and wastewater to the surroundings and have the effect of separating the gas-water mixture. The aperture of the overflow hole 6 is as small as possible on the premise that the hydrogen can be separated smoothly. The diameter of the overflow hole 6 of this embodiment is 1-2mm; the outer tube 1 is connected to the overflow pipe 7, and the end opening height of the overflow pipe 7 is lower than the overflow hole 6, so that the liquid level in the outer tube 1 can be discharged in the overflow pipe 7 when it is lower than the height of the overflow hole 6.

[0032] In the above device, the inner tube 2 and the outer tube 1 form two relatively independent accommodating spaces. The overflow hole 6 at the upper end of the inner tube 2 is used to connect the inner tube 2 and the outer tube 1, so that the hydrogen and wastewater in the inner tube 2 can only enter the outer tube 1 in an overflow manner. During the overflow process, the wastewater flows downward along the outer wall of the inner tube 2, and the hydrogen continues to float up, thereby realizing gas-water separation; the gas-liquid inlet pipe 3 enters the inner tube 2 to transport the gas-water mixture, and the gas-water mixture is output from the discharge hole 4 and gradually rises. A pulsator 5 is arranged above the discharge hole 4. The pulsator 5 can rotate to disturb the rising path of the gas-water mixture, so that the dispersed hydrogen bubbles gradually converge, and then separate from the gas-water mixture at the liquid level position in the inner tube 2 and concentrate on the upper part of the outer tube 1; the overflow pipe 7 is connected with the outer tube 1 to form a communicating vessel, and the liquid level in the outer tube 1 and the overflow pipe 7 can prevent the hydrogen from entering the overflow pipe 7 downward, thereby preventing the hydrogen from entering the sewer.

[0033] Through the above arrangement, the gas-water mixture is discharged from the discharge hole 4 on the side wall of the gas-liquid inlet pipe 3, so that the liquid level in the inner tube 2 gradually increases, and overflows to the outer tube 1 through the overflow hole 6, so that the liquid level in the outer tube 1 gradually increases, and overflows and is discharged to the sewer through the overflow pipe 7. Since the opening of the gas-liquid inlet pipe 3 is located in the upward pipeline, hydrogen floats upward under the action of buoyancy, which is the same as the flow direction of wastewater, so it can promote the discharge of hydrogen from the pipeline and avoid the accumulation of hydrogen in the gas-liquid inlet pipe 3; the discharge hole 4 of the gas-liquid inlet pipe 3 is submerged below the liquid level of the inner tube 2, and the discharge hole 4 on the side wall of the gas-liquid inlet pipe 3 and the impeller 5 arranged in the inner tube 2 have the function of adjusting the flow direction of the liquid, which prompts the hydrogen bubbles contained in the gas-water mixture to turn during the discharge and floating process, and then gather into larger bubbles for easy collection. After the hydrogen is separated from the gas and water in the inner tube 2, it accumulates near the upper exhaust port 8; the wastewater overflowing through the overflow hole 6 establishes a liquid level in the outer tube 1. At this time, the sewer and the hydrogen above the outer tube 1 are separated by the liquid level established by the outer tube 1 and the overflow pipe 7, making it difficult for hydrogen to enter the sewer through the overflow pipe 7, thereby effectively collecting hydrogen for centralized treatment.

[0034] An exhaust port 8 is provided at the top end of the outer tube 1 outside the inner tube 2. The exhaust port 8 is connected to the vent pipe of the hydrogen production equipment and is used for centralized treatment of the exhaust gas discharged from the hydrogen production equipment.

[0035] Since the bottom end of the inner tube 2 is closed by the inner tube bottom plate 21 , the gas-liquid inlet pipe 3 passes through the inner tube bottom plate 21 and enters the inner tube 2 . The inner tube bottom plate 21 also serves as a limiter to keep the gas-liquid inlet pipe 3 in a vertical state.

[0036] like Figure 2 As shown, a vertical impeller shaft 9 is provided in the inner tube 2, and the impeller 5 is connected to the impeller shaft 9. The impeller shaft 9 is connected to the top plate of the inner tube 2 through a bearing 10, so that the impeller 5 is driven to rotate during the upward flow of the gas-water mixture, thereby changing the flow direction of the gas-water mixture near the impeller 5 and improving the gas-water separation effect.

[0037] The impeller 5 in the inner tube 2 includes a plurality of radially arranged water-spraying wings 51, and there are gaps connecting the upper and lower parts between adjacent water-spraying wings 51. The water-spraying wings 51 can make the impeller 5 rotate driven by the gas-water mixture, and both the waste liquid and the hydrogen bubbles surge up through the gaps. Under the obstruction of the water-spraying wings 51, the movement directions of the water flow and the hydrogen bubbles are changed, and due to the different specific gravities of the waste water and the hydrogen bubbles, the hydrogen bubbles can be caused to gather together, thereby improving the hydrogen collection effect.

[0038] The water-beating wings 51 are arranged in a spiral shape. Figure 3As shown, the water-beating fins 51 are inclined at an angle α of 30° to the horizontal direction in the impeller 5, similar to the oblique arrangement of fan wings. When rotated under the action of water flow and air flow, the gas-water mixture is fully stirred, so that the hydrogen molecules are fully precipitated in the water, thereby further separating and avoiding residual hydrogen molecules from remaining in the wastewater. After being treated by the water-beating fins 51, the size of most hydrogen bubbles can be increased to 2-3mm, thereby having a higher buoyancy and the ability to adsorb other small-sized hydrogen bubbles.

[0039] At the position of the overflow hole 6, the aperture of the overflow hole 6 is smaller than the size of the hydrogen bubbles of 2-3 mm, resulting in that these hydrogen bubbles are blocked by the overflow hole 6 and slightly aggregated, but it does not affect the hydrogen passing through the overflow hole 6, and the slightly aggregated hydrogen bubbles can further absorb and fuse the remaining small-sized hydrogen bubbles; since the direction of the water flow is from top to bottom, which is opposite to the upward trend of the hydrogen bubbles that have grown into a larger size, it further promotes the separation of gas and water, thereby obtaining a better gas-water separation effect, and the gas-water separation processing capacity is about 20-50mL / min.

[0040] like Figure 1 As shown, in order to improve the installation strength of the impeller 5, the top end of the impeller shaft 9 is fixed to the top end of the inner tube 2, and the bottom end of the impeller shaft 9 is abutted against the gas-liquid inlet pipe 3. The impeller shaft 9 is fixed at two positions to avoid shaking of the impeller shaft 9 during the rotation of the impeller 5, so as to increase the service life of the device.

[0041] The outer tube 1 is connected to the water inlet pipe 11, so that when the water seal device is activated, water can be firstly transported into the outer tube 1 through the water inlet pipe 11 to establish a liquid level, thereby forming a water seal state.

[0042] The overflow pipe 7 includes a vertically upward riser, which is fixed to the outside of the outer pipe 1 through an overflow pipe frame 71. A downward curved pipe is arranged at the end of the riser, forming a common overflow pipe structure. The liquid level in the overflow pipe 7 is controlled to move within the range of the riser to achieve a water seal. The connecting position between the overflow pipe 7 and the outer pipe 1 is located at the lower part of the outer pipe 1 and is flush with the water inlet pipe 11. This ensures that there is always water in the outer pipe 1 and that the inner portion contains a minimum amount of water reserves, thereby ensuring maximum drainage.

[0043] Since the hydrogen production equipment is usually installed on the ground, and the drainage pipe is generally slightly lower than the ground, when installing the water seal device provided in this embodiment, the outer tube bottom plate 12 at the lowest end needs to be installed below the ground, specifically 50 cm below the ground. The end of the overflow pipe 7 is connected to the sewer pipe, and the outer tube bottom plate 12 is always kept below the lowest surface of the drainage pipe to prevent the siphon phenomenon caused by the overflow port of the drainage pipe being too low, and to avoid all the water in the water seal from flowing out of the overflow port of the drainage pipe.

[0044] The water sealing method using the water sealing device for draining water from hydrogen production equipment comprises the following process:

[0045] The gas-water mixture containing hydrogen produced by the hydrogen production equipment is discharged into the gas-liquid inlet pipe 3 through the gas-water mixture discharge port 31, and enters the inner tube 2 along the gas-liquid inlet pipe 3; the gas-water mixture rises in the inner tube 2, and the impeller 5 is driven to rotate by the gas-water mixture flowing upward, which promotes the separation of gas and water, and the liquid level in the inner tube 2 gradually rises to the overflow hole 6; the waste water is discharged between the inner tube 2 and the outer tube 1 through the overflow hole 6, and since the outer tube 1 is connected to the overflow pipe 7, the waste water in the outer tube 1 enters the overflow pipe 7, and the liquid level with equal pressure is established in the overflow pipe 7 and the outer tube 1 to achieve water sealing.

[0046] Since in the present device, the flow of hydrogen is upward, while the waste water flows downward in the outer pipe 1, it is possible to prevent hydrogen from entering the sewer.

[0047] During the process, the hydrogen separated from the gas-water mixture is also discharged through the overflow hole 6 and gathered at the top of the outer tube 1 to form a gas chamber isolated by the liquid level of the outer tube 1, and then regularly discharged through the exhaust port 8 at the top of the outer tube 1 to be centrally treated with other waste gases generated by the hydrogen production equipment.

[0048] When the water seal device is just activated and there is no waste water in the outer tube 1 and the overflow pipe 7, the liquid level in the outer tube 1 is first adjusted through the water inlet pipe 11, and water is transported into the outer tube 1 by the water inlet pipe 11 to establish a liquid level in the outer tube 1 and the overflow pipe 7 to achieve a water seal, so that the inner tube 2 and the sewer are not connected, and then the gas-water mixture produced by the hydrogen production equipment is discharged through the gas-liquid inlet pipe 3; in the daily working state, if the hydrogen contained in the gas-water mixture produced by the hydrogen production equipment increases and is not discharged in time through the exhaust port 8, the air chamber range in the outer tube 1 is expanded, forcing the liquid level in the outer tube 1 to decrease; at this time, after exhausting through the exhaust port 8, the liquid level in the outer tube 1 is difficult to increase quickly, and the liquid level in the outer tube 1 can also be adjusted through the water inlet pipe 11.

[0049] Example 2

[0050] The difference between this embodiment and embodiment 1 is that the impeller shaft 9 in this embodiment is fixed between the top plate of the inner tube 2 and the gas-liquid inlet pipe 3, and multiple impellers 5 are connected to the impeller shaft 9 through their own impeller bearings. Then, during the gas-water separation process, the impeller shaft 9 does not rotate, but a single impeller 5 can be driven to rotate, so that the rotation speeds of different impellers 5 can be different, thereby adapting to the rotation states of the gas-water mixture at different heights in the inner tube 2.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water seal device for drainage of hydrogen production equipment, characterized in that: It comprises a vertically arranged outer tube and an inner tube vertically arranged inside the outer tube, the bottom and top ends of the outer tube and the inner tube are closed; a gas-liquid inlet tube passes through the outer tube and extends into the inner tube, the terminal pipeline of the gas-liquid inlet tube is directed upward, and the side wall of the gas-liquid inlet tube in the inner tube is provided with a plurality of discharge holes, and the discharge holes of the gas-liquid inlet tube are submerged below the liquid level of the inner tube; a plurality of vertically arranged and rotatable impellers are provided above the gas-liquid inlet tube in the inner tube, and a plurality of through overflow holes are provided on the side wall of the inner tube above the impeller; the outer tube is connected to the overflow pipe, and the terminal opening height of the overflow pipe is lower than the overflow hole; an exhaust port is provided at the top end of the outer tube outside the inner tube; the outer tube is connected to the water inlet pipe.

2. The water seal device for draining water from hydrogen production equipment according to claim 1, characterized in that: The exhaust port is connected to a vent pipe of the hydrogen production equipment.

3. The water seal device for draining water from hydrogen production equipment according to claim 1, characterized in that: A vertical impeller shaft is arranged in the inner tube, and the impeller is connected to the impeller shaft.

4. The water seal device for draining water from hydrogen production equipment according to claim 3, characterized in that: The impeller shaft is connected to the top plate of the inner tube through a bearing; or, the impeller shaft is fixed between the top plate of the inner tube and the gas-liquid inlet pipe, and a plurality of impellers are connected to the impeller shaft through bearings.

5. The water seal device for draining water from hydrogen production equipment according to claim 1, characterized in that: The impeller comprises a plurality of radially arranged water-spraying wings, and gaps communicating with each other vertically are formed between adjacent water-spraying wings.

6. The water seal device for draining water from hydrogen production equipment according to claim 1, characterized in that: The overflow pipe includes a vertical upward standpipe, which is fixed to the outside of the outer pipe through an overflow pipe rack. A downward curved pipe is arranged at the end of the standpipe. The connection position between the overflow pipe and the outer pipe is located at the lower part of the outer pipe and is level with the water inlet pipe.

7. A water sealing method using the water sealing device for drainage of hydrogen production equipment according to any one of claims 1 to 6, characterized in that: The process includes the following: a gas-water mixture containing hydrogen enters the inner tube along the gas-liquid inlet pipe, the impeller is driven to rotate by the gas-water mixture flowing upward, promoting the separation of gas and water, the liquid level in the inner tube gradually rises to the overflow hole, the waste water is discharged between the inner tube and the outer tube through the overflow hole, and then enters the overflow pipe, establishing the liquid level in the overflow pipe and the outer tube to realize water seal.

8. The water sealing method according to claim 7, characterized in that: The separated hydrogen is discharged through the exhaust port.

9. The water sealing method according to claim 7, characterized in that: The liquid level in the outer tube is regulated via the water inlet pipe.

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