Gas-liquid separator and hydrogen production system
By designing a flushing pipeline in the gas-liquid separator to rinse the deposited solid impurities, the problem of pipeline blockage caused by the accumulation of solid impurities during the operation of the alkaline electrolytic cell is solved, and efficient cleaning of the gas-liquid separator is achieved.
Patent Information
- Application Number
- CN202421631730.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-10
AI Technical Summary
Solid impurities generated during operation of alkaline electrolytic tanks accumulate in the gas-liquid separator, which easily blocks the pipeline and affects the stability of the control system.
A gas-liquid separator is designed, including a tank body and a flushing pipe. The tank body is provided with an inlet, a gas outlet and a liquid outlet. The flushing pipe part extends into the tank body, and the flushing outlet faces the bottom of the tank body to flush the deposited solid impurities.
The solid impurities are washed off by the flushing medium of the flushing pipe and discharged with the liquid outlet, effectively avoiding the pipeline blockage caused by the accumulation of solid impurities and improving the cleaning efficiency of the gas-liquid separator.
Smart Images
Figure CN222985173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogen production, in particular to a gas-liquid separator and a hydrogen production system using the gas-liquid separator. Background Art
[0002] Alkaline electrolyzers are widely used in new energy hydrogen production scenarios due to their low cost and large gas production. However, as the operation time of alkaline electrolyzers increases, some solid impurities will inevitably fall off. These shed impurities will enter the hydrogen separator and oxygen separator with the circulating alkali solution. After entering the separator, these solid impurities will accumulate at the bottom of the separator. If there are too many accumulated solid impurities, there may be a risk of clogging the pipelines related to the gas-liquid separator. For example, when the accumulated solid impurities block the pipeline of the liquid level meter, it is easy to affect the stability of the control system. Utility Model Content
[0003] The main purpose of the utility model is to provide a gas-liquid separator and a hydrogen production system, aiming to improve the problem that solid impurities are easily blocked in the gas-liquid separator after being accumulated.
[0004] To achieve the above-mentioned purpose, the gas-liquid separator proposed in the utility model includes a tank body and a flushing pipe; an inlet is provided on the tank body, and the tank body has a top and a bottom that are relatively arranged, a gas outlet is provided on the top, and a liquid outlet is provided on the bottom; the flushing pipe at least partially extends into the tank body, and the flushing pipe is provided with a flushing inlet and a flushing outlet that are interconnected, and the flushing outlet faces the bottom of the tank body.
[0005] In one embodiment, the flushing outlet is provided in plurality.
[0006] In one embodiment, the flushing pipeline includes a main pipeline, the extension direction of the main pipeline is set at an angle with the direction from the top of the tank body to the bottom of the tank body, and the plurality of flushing outlets are opened in the main pipeline.
[0007] In one embodiment, the flushing pipe further comprises an inlet pipe, which is arranged at an angle with the main pipe, one end of the inlet pipe is connected to the main pipe, and the other end of the inlet pipe extends in a direction away from the bottom of the tank body.
[0008] In one embodiment, the flushing outlets are provided in at least two rows, and the at least two rows of flushing outlets are staggered.
[0009] In one embodiment, in the direction perpendicular to the top to the bottom, the flushing outlets near the two ends of the bottom are respectively defined as a first flushing outlet and a second flushing outlet, and the first flushing outlet and the second flushing outlet are respectively inclined in directions away from each other.
[0010] In one embodiment, in the direction perpendicular to the top to the bottom, the flushing pipe is slidably arranged in the tank body.
[0011] In one embodiment, in the direction from the side near the bottom of the tank body to the side far from the bottom of the tank body, the cross-sectional area of the flushing outlet gradually decreases.
[0012] The present utility model further provides a hydrogen production system, including the above-mentioned gas-liquid separator.
[0013] In one embodiment, there are two gas-liquid separators, and each gas-liquid separator is further provided with a communication port at the bottom. The hydrogen production system further includes:
[0014] A communication pipe, the two ends of the communication pipe are respectively communicated with the communication ports of the two gas-liquid separators; and
[0015] A third liquid outlet pipe, one end of the third liquid outlet pipe is communicated with the communication pipe, and the other end extends downward. A third control valve is provided on the third liquid outlet pipe.
[0016] The technical solution of the present utility model is to provide an inlet on the tank body of the gas-liquid separator, which facilitates the mixture to enter the tank body from the inlet and enables gas-liquid separation in the tank body. By providing a gas outlet at the top of the tank body and a liquid outlet at the bottom of the tank body, it is convenient for the separated gas to be discharged from the gas outlet and the separated liquid to be discharged from the liquid outlet. By extending at least part of the flushing pipe into the tank body, the flushing pipe is provided with a mutually communicated flushing inlet and flushing outlet, and the flushing outlet faces the bottom of the tank body, so that the flushing medium can be introduced from the inlet of the flushing pipe and scour the solid impurities deposited at the bottom of the tank body from the flushing outlet towards the bottom of the tank body. Then, the solid impurities can flow out from the liquid outlet along with the flushing liquid previously introduced into the tank body, thereby realizing the effect of cleaning the gas-liquid separator and improving the problem that the solid impurities are likely to block the pipeline after accumulating in the gas-liquid separator. Description of the Drawings
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0018] Figure 1 Schematic structural diagram of an embodiment of the gas-liquid separator provided by the present invention;
[0019] Figure 2 Schematic structural diagram of the bottom of the flushing pipeline of the gas-liquid separator provided by the present invention;
[0020] Figure 3 For Figure 2 Partial view of the cross-sectional view taken along A-A in
[0021] Figure 4 Schematic structural diagram of an embodiment of the hydrogen production system provided by the present invention.
[0022] Explanation of the reference numerals in the drawings:
[0023] 100, tank body; 110, top; 111, gas outlet; 120, bottom; 121, liquid outlet; 122, communication port; 101, inlet;
[0024] 200, flushing pipeline; 210, main pipeline; 211, flushing outlet; 220, inlet pipe;
[0025] 300, liquid level gauge;
[0026] 400, first liquid outlet pipe;
[0027] 500, first control valve;
[0028] 600, second liquid outlet pipe;
[0029] 700, second control valve;
[0030] 810, communication pipe; 820, third liquid outlet pipe;
[0031] 900, third control valve.
[0032] The realization of the objectives, functional features, and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. Specific embodiments
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] Alkaline electrolyzers are widely used in new energy hydrogen production scenarios due to their low cost and large gas production. However, as the operation time of alkaline electrolyzers increases, some solid impurities will inevitably fall off. These shed impurities will enter the hydrogen separator and oxygen separator with the circulating alkali solution. After entering the separator, these solid impurities will accumulate at the bottom of the separator. If there are too many accumulated solid impurities, there may be a risk of clogging the pipelines related to the gas-liquid separator. For example, when the accumulated solid impurities block the pipeline of the liquid level meter, it is easy to affect the stability of the control system.
[0037] In order to improve the problem that solid impurities are easily blocked in the pipeline after being accumulated in the gas-liquid separator, the utility model provides a gas-liquid separator.
[0038] In an embodiment of the present utility model, please refer to Figures 1 to 3, the gas-liquid separator includes a tank body 100 and a flushing pipeline 200; an inlet 101 is provided on the tank body 100, the tank body 100 has a top 110 and a bottom 120 which are oppositely arranged, a gas outlet 111 is provided on the top 110, and a liquid outlet 121 is provided on the bottom 120; at least part of the flushing pipeline 200 extends into the tank body 100, the flushing pipeline 200 is provided with a flushing inlet and a flushing outlet 211 which are communicated with each other, and the flushing outlet 211 faces the bottom 120 of the tank body 100.
[0039] In the field of hydrogen production technology, the gas-liquid separator can be a hydrogen separator or an oxygen separator, etc. The gas-liquid separator includes a tank body 100, and gas containing electrolyte is subjected to gas-liquid separation in the tank body 100. An inlet 101 is provided on the tank body 100, which facilitates the gas containing electrolyte to enter the tank body 100 through the inlet 101. The shape of the inlet 101 can be circular, rectangular or other shapes, and the size of the inlet 101 can be adaptively set according to the actual situation. When the gas-liquid separator is in a working state, the tank body 100 also has a top 110 and a bottom 120 which are oppositely arranged. According to the characteristics of the gas and the liquid, a gas outlet 111 is provided on the top 110 of the tank body 100, which facilitates the gas to be discharged from the gas outlet 111; a liquid outlet 121 is provided on the bottom 120 of the tank body 100, which facilitates the liquid to be discharged from the liquid outlet 121, and finally the effect of gas-liquid separation is achieved. Similarly, the shape of the gas outlet 111 can be circular, rectangular or other shapes, and the size of the gas outlet 111 can be adaptively set according to the actual situation. The shape of the liquid outlet 121 can be circular, rectangular or other shapes, and the size of the gas outlet 111 can be adaptively set according to the actual situation.
[0040] The gas-liquid separator further includes a flushing pipeline 200 for flushing the solid impurities deposited at the bottom 120 of the gas-liquid separator. By extending at least a part of the flushing pipeline 200 into the tank body 100, and the flushing pipeline 200 has a flushing inlet and a flushing outlet 211 that are interconnected, flushing medium can be introduced from the flushing inlet. After the flushing medium is filled into the flushing pipeline 200 from the flushing inlet, it then flows into the tank body 100 from the flushing outlet 211. In one example, when the gas-liquid separator is in an idle state, an appropriate amount of flushing liquid can be introduced into the tank body 100 in advance, and the flushing liquid can submerge the flushing outlet 211 of the flushing pipeline 200. Then, compressed air (i.e., the above-mentioned flushing medium) is introduced through the flushing inlet of the flushing pipeline 200. The introduction of the compressed air can disturb the flushing liquid, and when the flushing liquid is disturbed, it will stir up the solid impurities in the tank body 100 and mix the solid impurities into the flushing liquid, so that the solid impurities can be discharged together with the flushing liquid from the liquid outlet 121 at the bottom 120 of the tank body 100, thereby reducing the risk of pipeline blockage caused by solid impurity deposition. Further, the flushing outlet 211 faces the bottom 120 of the tank body 100, so that the flushing medium flowing out from the flushing outlet 211 can directly wash down the solid impurities deposited at the bottom 120 of the tank body 100, thereby improving the flushing efficiency. It should be noted that when the flushing outlet 211 in the technical solution of the present utility model faces the bottom 120 of the tank body 100, its orientation can be perpendicular to the ground, or its orientation can be set at an acute angle to the ground. Specifically, the direction from the top 110 to the bottom 120 of the flushing pipeline 200 is defined as the vertical direction. The flushing inlet of the flushing pipeline 200 can face away from the bottom 120 of the tank body 100, or can face the horizontal direction, etc.
[0041] In addition, when the gas-liquid separator is applied to a hydrogen production system for purifying hydrogen, since hydrogen is a flammable and explosive gas, contact and mixing of hydrogen with oxygen or air inside the hydrogen production system should be avoided. Therefore, during the shutdown and startup processes of the hydrogen production system, nitrogen replacement operations are usually required. Among them, during the shutdown process, the nitrogen replacement operation is mainly aimed at discharging the residual hydrogen in the hydrogen pipeline of the hydrogen production system to prevent hydrogen and oxygen from intermixing and causing hydrogen-oxygen mixing; while the nitrogen replacement operation during the startup process is mainly aimed at discharging the air that has entered the hydrogen pipeline of the hydrogen production system to avoid mixing of the electrolytically generated hydrogen with the oxygen in the air. The flushing pipeline 200 in the technical solution of the present utility model can also be used as a nitrogen replacement pipeline. Thus, when the hydrogen production system is in a working state, nitrogen can be flushed into the flushing pipeline 200 of the gas-liquid separator. Since hydrogen is lighter in mass than nitrogen, when nitrogen is filled into the tank body 100, it will prompt hydrogen to be discharged from the gas outlet 111 at the top 110 of the tank body 100, thereby reducing the risk of hydrogen residue.
[0042] The technical solution of the present utility model is that an inlet 101 is provided on the tank body 100 of the gas-liquid separator, so that the mixture can easily enter the tank body 100 from the inlet 101 and gas-liquid separation can be carried out in the tank body 100. By providing a gas outlet 111 at the top 110 of the tank body 100 and a liquid outlet 121 at the bottom 120 of the tank body 100, it is convenient for the separated gas to be discharged from the gas outlet 111 and the separated liquid to be discharged from the liquid outlet 121. By extending at least part of the flushing pipeline 200 into the tank body 100, the flushing pipeline 200 is provided with a flushing inlet and a flushing outlet 211 that communicate with each other, and the flushing outlet 211 faces the bottom 120 of the tank body 100, so that the flushing medium can be introduced from the inlet 101 of the flushing pipeline 200 and scour the solid impurities deposited at the bottom 120 of the tank body 100 from the flushing outlet 211. Then, the solid impurities can flow out from the liquid outlet 121 along with the flushing liquid previously introduced into the tank body 100, thereby achieving the effect of cleaning the gas-liquid separator and improving the problem that the solid impurities are likely to block the pipeline after accumulating in the gas-liquid separator. In addition, the flushing channel can also be used as a nitrogen replacement pipeline, which can reduce the situation of separately setting a nitrogen replacement pipeline and save costs.
[0043] In an embodiment of the present utility model, as Figure 2 shown, there are a plurality of flushing outlets 211.
[0044] By providing a plurality of flushing outlets 211, the flushing medium can be blown out towards the bottom 120 of the tank body 100 through the plurality of flushing outlets 211 at the same time, and the flushing range can be expanded. Thus, on the one hand, the flushing efficiency can be improved, and on the other hand, the flushing area can be increased.
[0045] Specifically, the shapes and / or sizes of the plurality of flushing outlets 211 may be the same or different. At least two of the plurality of flushing outlets 211 may have different shapes and / or sizes. In the technical solution of the present utility model, the number of flushing inlets may be the same as or different from the number of flushing outlets 211. For example, the number of flushing inlets may be one, two or more.
[0046] Further, please refer to Figure 1 and Figure 2 , the flushing pipeline 200 includes a main pipeline 210, and the extending direction of the main pipeline 210 is arranged at an angle with the direction from the top 110 of the tank body 100 to the bottom 120 of the tank body through the inlet pipe 220. A plurality of flushing outlets 211 are provided on the main pipeline 210.
[0047] The extending direction of the main pipe 210 is set at an angle to the direction from the top 110 to the bottom 120 of the tank body 100, so that more flushing outlets 211 can be opened on the main pipe 210, thereby reducing the number of branches of the flushing pipe 200 on the premise of setting a plurality of flushing outlets 211.
[0048] Further, as Figure 1 or Figure 4 shown, the flushing pipe 200 further includes an inlet pipe 220. The inlet pipe 220 is arranged at an angle to the main pipe 210. One end of the inlet pipe 220 is connected to the main pipe 210, and the other end of the inlet pipe 220 extends in a direction away from the bottom 120 of the tank body 100.
[0049] By arranging the inlet pipe 220 at an angle to the main pipe 210, and one end of the inlet pipe 220 is connected to the main pipe 210 and the other end extends in a direction away from the bottom 120 of the tank body 100, it is beneficial for the flushing medium introduced from the flushing inlet to quickly flow out from the flushing outlet 211. In addition, the traditional nitrogen replacement pipe only includes a straight pipe. When the flushing pipe 200 in the technical solution of the present invention includes the inlet pipe 220 and the above-mentioned main pipe 210, and the flushing pipe 200 is used as the nitrogen replacement pipe, it is longer than the traditional nitrogen replacement pipe. Furthermore, the nitrogen replacement can be more comprehensive, effectively reducing the number of nitrogen replacements and improving the replacement effect, and saving the use cost.
[0050] Specifically, the inlet pipe 220 and the main pipe 210 can be perpendicularly arranged. For example, when the main pipe 210 extends in the horizontal direction, the inlet pipe 220 can extend in the vertical direction. Or the inlet pipe 220 and the main pipe 210 are arranged at an acute angle or an obtuse angle. The number of inlet pipes 220 can be one, or the number of inlet pipes 220 can be at least two, and at least two inlet pipes 220 are arranged in parallel.
[0051] In an embodiment of the present invention, as Figure 2 shown, there are at least two rows of flushing outlets 211, and at least two rows of flushing outlets 211 are arranged in a staggered manner.
[0052] By arranging at least two rows of flushing outlets 211 in a staggered manner, the flushing range is larger, and more solid impurities deposited at the bottom 120 of the tank body 100 are washed away.
[0053] In an embodiment of the present invention, in the direction perpendicular to the top 110 to the bottom 120, the flushing outlets 211 near the two ends of the bottom 120 are respectively defined as the first flushing outlet 211 and the second flushing outlet 211, and the first flushing outlet 211 and the second flushing outlet 211 are respectively inclined in directions away from each other.
[0054] With such a setting, the flushing outlets 211 at both ends of the bottom 120 can flush the positions of the bottom 120 of the tank body 100 that do not correspond to the flushing pipeline 200, thereby expanding the flushing range and improving the flushing effect.
[0055] In an embodiment of the present utility model, as Figure 3 shown, in the direction from the side close to the bottom 120 of the tank body 100 to the side far from the bottom 120 of the tank body 100, the cross-sectional area of the flushing outlet 211 gradually decreases.
[0056] With such a setting, the flushing medium ejected from the flushing outlet 211 can scour the solid impurities at the bottom 120 of the tank body 100 in a form similar to an umbrella shape, thereby expanding the flushing range and improving the flushing effect.
[0057] In an embodiment of the present utility model, in the direction from the vertical top 110 to the bottom 120, the flushing pipeline 200 is slidably arranged on the tank body 100.
[0058] With such a setting, during the sliding process of the flushing pipeline 200, the flushing outlet 211 can move in the direction from the vertical top 110 to the bottom 120, thereby reducing the flushing blind area and improving the flushing effect.
[0059] The present utility model also proposes a hydrogen production system, as Figure 4 shown, the hydrogen production system includes a gas-liquid separator, and the specific structure of the gas-liquid separator refers to the above embodiment. Since this hydrogen production system adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.
[0060] In an embodiment of the present utility model, as Figure 4 shown, the hydrogen production system further includes a liquid level gauge 300, and the liquid level gauge 300 is installed on the gas-liquid separator.
[0061] By setting the liquid level gauge 300, the liquid level gauge 300 can monitor the liquid level height in the gas-liquid separator. When the liquid level height reaches the drainage liquid level, the liquid outlet 121 can be controlled to open to discharge the liquid in the gas-liquid separator; and / or when the liquid level gauge 300 monitors that the liquid level height in the gas-liquid separator is lower than the set minimum liquid level, the liquid outlet 121 can be closed to prevent all the liquid in the gas-liquid separator from being discharged, thereby realizing the effect of liquid sealing the drainage port, reducing the risk of a large amount of gas in the gas-liquid separator being discharged from the drainage port, and avoiding the waste of hydrogen.
[0062] Combined with the solution of the gas-liquid separator in the technical solution of the present utility model provided with the above-mentioned flushing pipeline 200, by setting the flushing pipeline 200, the solid impurities in the gas-liquid separator can be cleaned in time, thereby reducing the risk of the connection pipeline between the liquid level gauge 300 and the gas-liquid separator being blocked by solid impurities, further improving the detection accuracy of the liquid level gauge 300, and further improving the control accuracy of the entire control system.
[0063] In an embodiment of the present utility model, as Figure 4 shown, a first liquid outlet pipe 400 is connected to the bottom 120 of the liquid level gauge 300, and a first control valve 500 is provided on the first liquid outlet pipe 400; a second liquid outlet pipe 600 is installed at the liquid outlet 121, and a second control valve 700 is provided on the second liquid outlet pipe 600.
[0064] By providing a first control valve 500 on the first liquid outlet pipe 400 at the bottom 120 of the liquid level gauge 300 and a second control valve 700 on the second liquid outlet pipe 600 installed at the liquid outlet 121, the effect of draining the liquid completely through the first control valve 500 and the second control valve 700 can be achieved.
[0065] In an embodiment of the present utility model, as Figure 4 shown, there are two gas-liquid separators, and a communication port 122 is further provided at the bottom 120 of each gas-liquid separator. The hydrogen production system further includes a communication pipe 810 and a third liquid outlet pipe 820. The two ends of the communication pipe 810 are respectively connected to the communication ports 122 of the two gas-liquid separators; one end of the third liquid outlet pipe 820 is connected to the communication pipe 810, and the other end extends downward, and a third control valve 900 is provided on the third liquid outlet pipe 820.
[0066] Specifically, when there are two gas-liquid separators, the two gas-liquid separators can be a gas-liquid separator for separating hydrogen and a gas-liquid separator for separating oxygen respectively; or the two gas-liquid separators can both be gas-liquid separators for separating hydrogen; or the two gas-liquid separators can both be gas-liquid separators for separating oxygen.
[0067] By providing a communication port 122 at the bottom 120 of each gas-liquid separator, the two communication ports 122 are connected through the communication pipe 810, and the third liquid outlet pipe 820 is connected to the communication pipe 810, so that the liquid in each gas-liquid separator can also flow out through the communication pipe 810 and the third liquid outlet pipe 820 in sequence, thereby improving the liquid outflow efficiency. And when set in this way, the number of the third liquid outlet pipes 820 is also reduced, the number of the third control valves 900 is reduced, and the cost is reduced. In addition, by providing a third control valve 900 on the third liquid outlet pipe 820, the third control valve 900 can control whether the liquid in the third liquid outlet pipe 820 is discharged, improving the control flexibility of the liquid discharge of the hydrogen production system.
[0068] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A gas-liquid separator, characterized in that: include: A tank body, wherein the tank body is provided with an inlet, the tank body has a top and a bottom which are arranged opposite to each other, the top is provided with a gas outlet, and the bottom is provided with a liquid outlet; and A flushing pipe, wherein the flushing pipe at least partially extends into the tank body, and the flushing pipe is provided with a flushing inlet and a flushing outlet which are interconnected, and the flushing outlet faces the bottom of the tank body.
2. The gas-liquid separator according to claim 1, characterized in that: The flushing outlet is provided in plurality.
3. The gas-liquid separator according to claim 2, characterized in that: The flushing pipeline includes a main pipeline, the extension direction of the main pipeline is arranged at an angle with the direction from the top of the tank body to the bottom of the tank body, and a plurality of flushing outlets are opened in the main pipeline.
4. The gas-liquid separator according to claim 3, characterized in that: The flushing pipeline also includes an inlet pipe, which is arranged at an angle with the main pipeline. One end of the inlet pipe is connected to the main pipeline, and the other end of the inlet pipe extends in a direction away from the bottom of the tank body and is provided with the flushing inlet.
5. The gas-liquid separator according to claim 2, characterized in that: The flushing outlets are arranged in at least two rows, and the flushing outlets in at least two rows are arranged in a staggered manner.
6. The gas-liquid separator according to claim 2, characterized in that: In a direction perpendicular to the top to the bottom, the flushing outlets at both ends close to the bottom are respectively defined as a first flushing outlet and a second flushing outlet, and the first flushing outlet and the second flushing outlet are respectively arranged to be inclined away from each other.
7. The gas-liquid separator according to any one of claims 1 to 6, characterized in that: The flushing pipe is slidably disposed on the tank body in a direction perpendicular to the top to the bottom.
8. The gas-liquid separator according to any one of claims 1 to 6, characterized in that: The cross-sectional area of the flushing outlet gradually decreases in a direction from a side close to the bottom of the tank body to a side away from the bottom of the tank body.
9. A hydrogen production system, characterized in that: Comprising the gas-liquid separator as claimed in any one of claims 1 to 8.
10. The hydrogen production system according to claim 9, characterized in that: The gas-liquid separators are provided with two, and a communication port is provided at the bottom of each gas-liquid separator. The hydrogen production system further comprises: a connecting pipe, the two ends of which are respectively connected to the connecting ports of the two gas-liquid separators; and A third liquid outlet pipe, one end of which is connected to the connecting pipe and the other end of which extends downwards, and a third control valve is provided on the third liquid outlet pipe.