Gas-liquid separator and water electrolysis hydrogen production system

Abstract

The utility model discloses a gas-liquid separator and a water electrolysis hydrogen production system. The gas-liquid separator comprises a shell, a washing tank, a gas-liquid primary separation chamber, a spray head and a cooling coil. A gas-liquid primary separation chamber and a washing tank are arranged in the shell. The nozzle is arranged in the gas-liquid primary separation chamber and is spaced from the bottom of the gas-liquid primary separation chamber by a preset distance. The washing tank comprises a containing space used for containing washing liquid, the washing tank is located above the gas-liquid primary separation cavity, and the containing space of the washing tank is communicated with the gas-liquid primary separation cavity. The cooling coil extends in the height direction and is arranged on the outer wall of the shell in a surrounding mode. According to the gas-liquid separator, the three technological processes of gas washing, gas-liquid separation and cooling are integrated in the internal space of the same shell, the situation that the separation efficiency is influenced by a complex internal structure is avoided, the occupation of the internal space is reduced, the gas escape efficiency is improved, and the use of pipelines is reduced; the problem of product waste caused by retention of gas or liquid in the pipeline is reduced, the treatment efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of alkaline electrolytic water hydrogen production, and particularly relates to a gas-liquid separator and an electrolytic water hydrogen production system. Background Art

[0002] The prior art for separating alkali-containing gas and liquid to obtain gas (hydrogen or oxygen) products often requires three process steps: washing, cooling, and separation. These three process steps are carried out in three or two separate or simply stacked equipment spaces, and the equipment is connected by pipelines, resulting in a complex internal structure of the entire device, a large occupation of internal space, low overall processing efficiency of the equipment, high manufacturing cost, and product waste problems caused by the retention of gas or liquid in the pipelines.

[0003] Therefore, there is a need for a gas-liquid separator and an electrolytic water hydrogen production system to at least partially solve the above problems. Summary of the Utility Model

[0004] A series of simplified concepts are introduced in the Summary of the Utility Model section, which will be further elaborated in the Detailed Description section. The Summary of the Utility Model section of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To at least partially solve the above problems, a first aspect of the present utility model provides a gas-liquid separator for connecting to a hydrogen production electrolytic cell. The gas-liquid separator includes:

[0006] A housing, with a gas-liquid preliminary separation chamber arranged inside the housing;

[0007] A spray head, which is arranged in the gas-liquid preliminary separation chamber and is spaced a predetermined distance from the bottom of the gas-liquid preliminary separation chamber;

[0008] A washing tank, which is arranged inside the housing. The washing tank includes a receiving space for receiving a washing liquid. The washing tank is located above the gas-liquid preliminary separation chamber, and the receiving space of the washing tank communicates with the gas-liquid preliminary separation chamber; and

[0009] A cooling coil, which extends along the height direction and surrounds the outer wall of the housing.

[0010] According to the gas-liquid separator of the present utility model, three technological processes of gas washing, gas-liquid separation and cooling are integrated within the internal space of the same housing. The internal structure is simple, avoiding the influence of a complex internal structure on the separation efficiency. The cooling coil is arranged on the outer wall of the housing, reducing the occupation of the internal space of the housing, improving the gas escape efficiency, reducing the use of pipelines, and reducing the problem of product waste caused by the retention of gas or liquid in the pipelines. A washing tank is arranged above the gas-liquid preliminary separation chamber, improving the treatment efficiency and reducing the cost.

[0011] Optionally, the housing is provided with a gas-liquid mixture inlet;

[0012] One side of the spray head is communicated with the gas-liquid mixture inlet, and the other side of the spray head is configured to be annular and extend along the circumferential direction of the housing;

[0013] A plurality of spray holes are spacedly arranged on the side of the spray head away from the gas-liquid mixture inlet.

[0014] Optionally, the washing tank includes a tank wall enclosing the accommodation space, and the gas-liquid separator further includes a connecting wall;

[0015] The connecting wall is sealingly connected between the upper part of the tank wall and the inner wall of the housing, so that the tank wall, the connecting wall and the inner wall of the housing below the connecting wall define the gas-liquid preliminary separation chamber.

[0016] Optionally, the tank wall is provided with a communication port allowing gas to enter the accommodation space from the gas-liquid preliminary separation chamber;

[0017] A first channel is arranged in the washing tank, and the first channel is communicated with the communication port and extends from the communication port to the bottom of the washing tank.

[0018] Optionally, the tank wall is further provided with an overflow port;

[0019] The opening position of the overflow port is lower than that of the communication port; and / or

[0020] A second channel is arranged in the gas-liquid preliminary separation chamber, and the second channel is communicated with the overflow port and extends from the overflow port to the bottom of the gas-liquid preliminary separation chamber.

[0021] Optionally, the gas-liquid separator further includes a demister, the demister is located inside the housing and above the washing tank, and the periphery of the demister is sealed with the inner wall of the housing.

[0022] Optionally, the housing is further provided with a gas outlet, and the gas outlet is located above the demister.

[0023] Optionally, the housing is further provided with a washing liquid inlet, and the washing liquid inlet communicates with the accommodation space of the washing tank; and / or

[0024] The housing is further provided with an alkali liquid outlet, the alkali liquid outlet communicates with the gas-liquid preliminary separation chamber, and the opening position of the alkali liquid outlet is lower than that of the nozzle.

[0025] Optionally, the housing includes a cylindrical body, an upper head and a lower head. The upper opening of the cylindrical body is closed by the upper head, and the lower opening of the cylindrical body is closed by the lower head. The upper and lower ends of the cooling coil respectively have a cooling water outlet and a cooling water inlet, and the cooling coil.

[0026] A second aspect of the present invention provides an electrolyzed water hydrogen production system, including:

[0027] A hydrogen production electrolytic cell; and

[0028] A gas-liquid separator according to any of the above solutions, and an inlet of the gas-liquid mixture of the gas-liquid separator is connected to the cathode side and / or the anode side of the hydrogen production electrolytic cell.

[0029] The electrolyzed water hydrogen production system according to the second aspect of the present invention can achieve a technical effect similar to that of the gas-liquid separator in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings of the present invention are used as a part of the present invention to understand the present invention. The embodiments of the present invention are shown in the drawings and their descriptions are used to explain the principles of the present invention.

[0031] In the drawings:

[0032] Figure 1 is a schematic cross-sectional structure diagram of a gas-liquid separator according to a preferred embodiment of the present invention; and

[0033] Figure 2 is Figure 1 a top view structural diagram of the nozzle (part) in

[0034] Description of the reference numerals:

[0035] 100: Gas-liquid separator 110: Housing

[0036] 111: Gas-liquid mixture inlet 112: Gas outlet

[0037] 113: Washing liquid inlet 114: Alkali liquid outlet

[0038] 115: Cylindrical body 116: Upper head

[0039] 117: Lower head 120: Gas-liquid initial separation chamber

[0040] 130: Washing tank 131: Side wall

[0041] 132: Bottom wall 133: Connecting wall

[0042] 134: Communication port 135: Overflow port

[0043] 136: First channel 137: Second channel

[0044] 140: Cooling coil 141: Cooling water outlet

[0045] 142: Cooling water inlet 150: Sprinkler head

[0046] 151: Spray hole 160: Demister

[0047] 170: Outer shell Detailed implementation manner

[0048] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some technical features well known in the art are not described.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0050] The ordinal numbers such as "first" and "second" cited in the present utility model are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are only for illustrative purposes and are not restrictive.

[0051] Now, the exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings.

[0052] Figure 1 and Figure 2 shows a gas-liquid separator 100 according to a first aspect of the present utility model. The gas-liquid separator 100 can be connected to the cathode side of a hydrogen production electrolytic cell so that the gas-carrying liquid on the cathode side flows into the gas-liquid separator 100 as a gas-liquid mixture, or connected to the anode side of the hydrogen production electrolytic cell so that the gas-carrying liquid on the anode side flows into the gas-liquid separator 100 as a gas-liquid mixture.

[0053] The gas-liquid separator 100 includes a housing 110, a washing tank 130, a gas-liquid preliminary separation chamber 120, a spray head 150, and a cooling coil 140. An internal space of the housing 110 is provided with the gas-liquid preliminary separation chamber 120. The spray head 150 is disposed within the gas-liquid preliminary separation chamber 120, and the spray head 150 is spaced apart from the bottom of the gas-liquid preliminary separation chamber 120 by a predetermined distance. The washing tank 130 is disposed within the housing 110, and the washing tank 130 includes an accommodation space for accommodating a washing liquid. The washing tank 130 is located above the gas-liquid preliminary separation chamber 120, and the accommodation space of the washing tank 130 communicates with the gas-liquid preliminary separation chamber 120. The cooling coil 140 extends in the height direction and surrounds the outer wall of the housing 110. In some embodiments, the cooling coil 140 can be a serpentine cooling tube.

[0054] According to the gas-liquid separator of the present utility model, three technological processes of gas washing, gas-liquid separation, and cooling are integrated within the internal space of the same housing. The internal structure is simple, avoiding the influence of a complex internal structure on the separation efficiency. The cooling coil is disposed on the outer wall of the housing, reducing the occupation of the internal space of the housing, improving the gas escape efficiency, reducing the use of pipelines, and reducing the problem of product waste caused by the retention of gas or liquid in the pipelines. A washing tank is disposed above the gas-liquid preliminary separation chamber, improving the processing efficiency and reducing the cost.

[0055] Reference Figure 1 and Figure 2 , the gas-liquid separator 100 can include a housing 110, a washing tank 130, a gas-liquid preliminary separation chamber 120, a spray head 150, and a cooling coil 140. The housing 110 can include a cylinder body 115, an upper head 116, and a lower head 117 that are sequentially connected in the height direction. The upper opening of the cylinder body 115 is closed by the upper head 116, and the lower opening of the cylinder body 115 is closed by the lower head 117, thereby enclosing the internal space of the housing 110.

[0056] The cooling coil 140 extends in the height direction and surrounds the outer wall of the housing 110. Specifically, it can surround the outer wall of the cylindrical body 115. The size of the cooling coil 140 in the height direction can be substantially the same as the size of the cylindrical body 115 in the height direction. Thus, the total length of the cooling coil 140 is relatively long, ensuring the cooling effect of the cooling coil 140. The upper and lower ends of the cooling coil 140 can respectively have a cooling water outlet 141 and a cooling water inlet 142. Cooling water flows in from the cooling water inlet 142 at the lower end of the cooling coil 140, rises in the internal space of the cooling coil 140 around the outer wall of the cylindrical body 115, and flows out from the cooling water outlet 141, with countercurrent heat exchange, ensuring the cooling effect. Setting the cooling coil 140 on the outer wall of the housing 110 reduces the space occupied by the overall device and the space occupied inside the housing 110, improving the gas escape efficiency. In some embodiments, the gas-liquid separator 100 may further include an outer shell 170 that covers the outside of the cooling coil 140 to protect the cooling coil 140 and enhance the aesthetic appearance.

[0057] The housing 110 may be provided with a gas-liquid mixture inlet 111, an alkali liquid outlet 114, a gas outlet 112, and a washing liquid inlet 113.

[0058] The middle lower part or the lower part of the cylindrical body 115 may be provided with a gas-liquid mixture inlet 111. The gas-liquid mixture inlet 111 may be connected to the internal space of the housing 110 via a spray head 150. Specifically, it may be connected to the gas-liquid preliminary separation chamber 120. Among them, the gas-liquid mixture inlet 111 may be connected to the spray head 150 via a gas-liquid mixture inlet pipe. The gas-liquid mixture inlet 111 is used to receive the gas-carrying liquid from the cathode side of the hydrogen production electrolyzer or the gas-carrying liquid from the anode side of the hydrogen production electrolyzer as the gas-liquid mixture. The gas-carrying liquid (i.e., the gas-liquid mixture) from the cathode side of the hydrogen production electrolyzer may be an alkaline liquid carrying hydrogen. The gas-carrying liquid (i.e., the gas-liquid mixture) from the anode side of the hydrogen production electrolyzer may be an alkaline liquid carrying oxygen. The gas-liquid mixture may be pumped into the gas-liquid mixture inlet 111 via a circulation pump.

[0059] The gas-liquid mixture can enter the spray head 150 through the gas-liquid mixture inlet 111. The spray head 150 is arranged in the gas-liquid primary separation chamber 120, that is, below the washing tank 130. One side of the spray head 150 is connected to the gas-liquid mixture inlet 111, and the other side of the spray head 150 is configured as an annular shape extending along the circumference of the housing 110. The gas-liquid mixture inlet 111 can be connected to the spray head 150 through the gas-liquid mixture inlet pipe. The spray head 150 can spray the gas-liquid mixture into the gas-liquid primary separation chamber 120. The spray head 150 can have a bubbling function. The spray head 150 can be provided with a plurality of spray holes 151 at intervals to communicate with the gas-liquid primary separation chamber 120. Specifically, a plurality of spray holes 151 can be provided at intervals on the side of the spray head 150 away from the gas-liquid mixture inlet 111. The spray head 150 and the bottom of the gas-liquid primary separation chamber 120 can be spaced apart by a predetermined distance. Specifically, the spray holes 151 of the spray head 150 and the bottom of the gas-liquid primary separation chamber 120 can be spaced apart by a predetermined distance. That is to say, the gas-liquid primary separation chamber 120 has a certain volume for containing liquid. In other words, the gas-liquid mixture enters the spray head 150 through the gas-liquid mixture inlet 111 and is ejected from the spray holes 151 of the spray head 150. The liquid in the gas-liquid mixture is separated from the gas in the gas-liquid mixture under the action of gravity. The liquid in the gas-liquid mixture falls to the bottom or lower part of the gas-liquid primary separation chamber 120, and the gas in the gas-liquid mixture escapes into the accommodation space of the washing tank 130 for washing by the washing liquid.

[0060] As Figure 2 shown, one side of the spray head 150 is connected to the gas-liquid mixture inlet 111, and the other side of the spray head 150 is configured as an annular shape extending along the circumference of the housing 110. Since one end of the spray head configured as a straight pipe or a non-closed arc-shaped pipe is connected to the gas-liquid mixture inlet 111 and the other end is a closed blind end, when the liquid enters the spray head of the straight pipe or the non-closed arc-shaped pipe from the gas-liquid mixture inlet 111, it often impacts the closed blind end. However, the closed annular spray head 150 does not have a blind end. Therefore, the spray head 150 configured as an annular shape is less impacted when the gas-liquid mixture enters and exits, is not easily damaged, reduces the replacement frequency of the spray head 150, reduces the operation cost, and improves the operation efficiency. At the same time, the circumference of the spray head 150 configured as an annular shape extending along the circumference of the housing 110 is large, and more spray holes 151 can be provided, which improves the spraying and separation efficiency.

[0061] The washing liquid inlet 113 can be connected to the accommodation space of the washing tank 130 through the washing liquid inlet pipe. Optionally, the outlet of the washing liquid inlet pipe can be connected to the bottom of the accommodation space of the washing tank 130, which improves the washing effect and washing efficiency. The washing liquid is used to remove impurities (including alkali liquid, alkaline particles, etc.) in the gas. The washing liquid can be pure water, and the soluble ions in the gas-liquid mixture can dissolve in the water and the washing liquid will not contaminate the alkali liquid.

[0062] The lye outlet 114 can be arranged at the lower part of the cylinder body 115 or on the lower end head 117. The lye outlet 114 can be communicated with the gas-liquid preliminary separation chamber 120 via a lye outlet pipeline so as to discharge the lye in the gas-liquid preliminary separation chamber 120, for example, return it to the electrolytic water hydrogen production system, for example, return it to the hydrogen production electrolytic cell. The opening position of the lye outlet 114 can be lower than that of the spray head 150. Specifically, the opening position of the lye outlet 114 can be lower than that of the plurality of spray holes 151.

[0063] The gas outlet 112 can be arranged at the upper part of the cylinder body 115 or on the upper end head 116. The gas outlet 112 is used for the gas that has been washed, cooled and separated to escape, so as to produce gas (such as hydrogen or oxygen). The gas outlet 112 can be communicated with the inside of the housing 110 via a gas outlet pipeline so that the gas escaping from the inside of the housing 110 is discharged from the gas outlet 112 out of the inner space of the housing 110 and can be recycled and stored.

[0064] It can be understood that the aforementioned gas-liquid mixture inlet 111, gas outlet 112, washing liquid inlet 113, lye outlet 114, etc. all have certain limitations in the height direction. Without special requirements, the relative position or relative angle in the horizontal direction is generally not specifically limited.

[0065] The gas-liquid separator 100 can further include a connecting wall 133 for connecting the housing 110 and the washing tank 130. The washing tank 130 is located inside the housing 110, and the washing tank 130 includes an accommodation space for accommodating the washing liquid. The washing tank 130 can include a tank wall surrounding the accommodation space.

[0066] In some embodiments, the connecting wall 133 can be sealingly connected between the upper part of the tank wall and the inner wall of the housing 110 so that the tank wall, the connecting wall 133 and the inner wall of the housing 110 below the connecting wall 133 can define the gas-liquid preliminary separation chamber 120.

[0067] In some embodiments, the washing tank 130 can be generally located at the middle position or the upper-middle position inside the housing 110. The washing tank 130 can be generally configured as a cuboid. The tank wall of the washing tank 130 can include a side wall 131 and a bottom wall 132. The side wall 131 extends upward from the bottom wall 132 to surround the accommodation space. The connecting wall 133 is sealingly connected to the upper part of the side wall 131 and the inner wall of the housing 110. The side wall 131 and the bottom wall 132 of the washing tank 130, the connecting wall 133 and the inner wall of the housing 110 below the connecting wall 133 can define the gas-liquid preliminary separation chamber 120. Of course, if necessary and / or desired, the washing tank 130 can also be configured as other shapes such as a hemispherical shape, a cylindrical shape, etc.

[0068] In some embodiments, the sidewall 131 may be in partial contact with the inner wall of the housing 110 or the sidewall 131 may be integrally provided with the inner wall of the housing 110 in part.

[0069] In some embodiments, the nozzle 150 may be located below the connecting wall 133. In some embodiments, the nozzle 150 may also be located below the bottom wall 132 of the washing tank 130. The specific setting can be flexibly adjusted according to actual needs.

[0070] The tank wall of the washing tank 130 may be provided with a communication port 134 that allows gas to enter the accommodation space from the gas-liquid preliminary separation chamber 120. The tank wall of the washing tank 130 may also be provided with an overflow port 135. The overflow port 135 may allow liquid to overflow from the accommodation space into the gas-liquid preliminary separation chamber 120. The opening position of the overflow port 135 may be lower than that of the communication port 134. The overflow port 135 can be used for overflow in the present utility model, that is, when the liquid level in the washing tank 130 is too high, it can overflow and drain out of the washing tank 130 through the overflow port 135. In other words, the washing liquid including the alkali liquid washed out from the gas overflows out of the accommodation space of the washing tank 130 through the overflow port 135 and flows into the gas-liquid preliminary separation chamber 120, and can enter the next process together with the alkali liquid in the gas-liquid preliminary separation chamber 120, such as being refluxed to the electrolytic water hydrogen production system.

[0071] In some embodiments, the communication port 134 may be opened on the sidewall 131 of the washing tank 130. A first channel 136 is provided in the washing tank 130. The first channel 136 communicates with the communication port 134 and extends from the communication port 134 to the bottom of the washing tank 130. It can be understood that during washing, separation, and cooling, the accommodation space of the washing tank 130 contains washing liquid. The lower end of the first channel 136 can extend below the liquid level of the washing liquid, so that the gas separated (e.g., escaped) from the following gas-liquid preliminary separation chamber 120 enters the washing liquid, improving the washing effect and washing efficiency.

[0072] In some embodiments, the overflow port 135 may be opened on the sidewall 131 of the washing tank 130. A second channel 137 may be provided in the gas-liquid preliminary separation chamber 120. The second channel 137 can communicate with the overflow port 135 and extend from the overflow port 135 to the bottom of the gas-liquid preliminary separation chamber 120. It can be understood that the gas-liquid preliminary separation chamber 120 may contain alkali liquid. The lower end of the second channel 137 extends below the liquid level of the alkali liquid to form a liquid seal, thereby preventing gas from flowing into the accommodation space of the washing tank 130 through the overflow port 135.

[0073] In some embodiments, the gas-liquid separator 100 may not include components such as a demister 160 disposed in the internal space of the housing 110, so as not to affect the gas escape efficiency.

[0074] In some other embodiments, the gas-liquid separator 100 may include a demister 160 for trapping the liquid in the gas escaping to the demister 160. The demister 160 may be disposed in the internal space of the housing 110, specifically above the scrubbing tank 130 and below the gas outlet 112. The periphery of the demister 160 may be sealed with the inner wall of the housing 110 via a baffle or the like to better trap the liquid in the gas. The demister 160 may be a wire mesh demister.

[0075] In some embodiments, another washing liquid inlet 113 may be provided above the demister 160 so that the washing liquid is sprayed onto the demister 160 to wash the liquid trapped on the demister 160. It can be understood that the washing liquid can flow out of the demister 160 by gravity and fall into the scrubbing tank 130.

[0076] Pipes such as the gas-liquid mixture inlet pipe, the washing liquid inlet pipe, the alkali liquid outlet pipe, the gas outlet pipe, etc. may be provided with valves, whereby the on-off of the pipeline can be conveniently controlled via the valves. In addition, pipes such as the gas-liquid mixture inlet pipe, the washing liquid inlet pipe, the alkali liquid outlet pipe, the gas outlet pipe, etc. may also be selectively omitted or all omitted. That is to say, the gas-liquid mixture inlet 111 can be directly connected to the spray head 150. The washing liquid inlet 113 can be directly connected to the accommodating space of the scrubbing tank 130. Thus, the use of pipes in the internal space of the housing 110 is reduced, the occupancy of the internal space of the housing 110 is reduced, and the gas escape efficiency is improved. The alkali liquid outlet 114 can be directly connected to the gas-liquid preliminary separation chamber 120, and the alkali liquid can be directly discharged from the gas-liquid preliminary separation chamber 120. The gas outlet 112 can also be directly connected to the demister 160, and the gas can be directly discharged from the inside of the housing 110.

[0077] In addition, optionally, the housing 110 may also be provided with a nitrogen inlet, a manhole, a thermometer interface, a pressure gauge interface, a spare port, etc. according to actual needs. The nitrogen inlet, the manhole, the pressure gauge interface and the spare port are all connected to the internal space of the housing 110. The nitrogen inlet is used to introduce nitrogen for purging and replacement. The manhole can be provided at the topmost part of the upper head 116 for subsequent inspection and maintenance. A manhole blind plate can be provided at the top of the manhole. The thermometer interface can be used to connect a thermometer to conveniently understand the temperature of the liquid inside the housing 110. The pressure gauge interface can be used to connect a pressure

[0078] In some embodiments, the gas-liquid separator 100 may further include legs, which may be connected to the bottom of the housing 110, and a reinforcing member may be connected between the legs to enhance the support effect. The legs may be used to keep the liquid level in the primary gas-liquid separation chamber 120 higher than that of the hydrogen production electrolytic cell. Optionally, the alkali liquid outlet 114 may be located above the hydrogen production electrolytic cell, so that the liquid (including alkali liquid, etc.) in the primary gas-liquid separation chamber 120 can conveniently flow back into the hydrogen production electrolytic cell.

[0079] The following briefly introduces the approximate flow direction of the gas-liquid mixture (for example, the gas-liquid mixture from the cathode side of the hydrogen production electrolytic cell, the gas-liquid mixture from the anode side of the hydrogen production electrolytic cell, etc.) after entering the gas-liquid separator 100 through the gas-liquid mixture inlet 111 in a preferred embodiment:

[0080] After the gas-liquid mixture enters the gas-liquid separator 100 through the gas-liquid mixture inlet 111, it flows to one side of the spray head 150 of the gas-liquid separator 100 and is ejected from the spray holes 151 on the other side of the spray head 150 of the gas-liquid separator 100.

[0081] In the primary gas-liquid separation chamber 120, the liquid in the gas-liquid mixture ejected from the spray holes 151 is separated from the gas in the gas-liquid mixture under the action of gravity, and the liquid in the gas-liquid mixture falls to the bottom or lower part of the primary gas-liquid separation chamber 120.

[0082] In the primary gas-liquid separation chamber 120, the gas in the gas-liquid mixture ejected from the spray holes 151 escapes and enters the washing liquid such as water in the accommodation space of the washing tank 130 through the communication port 134 and the first channel 136 for washing by the washing liquid. The washing liquid in the accommodation space of the washing tank 130 can be introduced through the washing liquid inlet 113. The washed gas moves upward and enters the demister 160. The demister 160 captures, for example, droplets in the gas. When the droplets in the demister 160 accumulate to a certain amount, the droplets fall and flow into the accommodation space of the washing tank 130. The gas escaping from the demister 160 can be discharged from the internal space of the housing 110 through the gas outlet 112, and then can be recycled and stored, etc.

[0083] When the liquid level of the liquid contained in the accommodation space of the washing tank 130 reaches or exceeds the overflow port 135, the liquid flows into the lower part or bottom of the primary gas-liquid separation chamber 120 through the overflow port 135 and the second channel 137, converges with the liquid contained in the primary gas-liquid separation chamber 120, and can be discharged through the alkali liquid outlet 114. The liquid leaving the housing 110 can flow back to the electrolytic water hydrogen production system, for example, it can flow back into the hydrogen production electrolytic cell.

[0084] The second aspect of the present utility model provides an electrolytic water hydrogen production system, including a hydrogen production electrolytic cell and a gas-liquid separator 100 according to the first aspect of the present utility model. The gas-liquid mixture inlet 111 of the gas-liquid separator 100 is connected to the cathode side and / or the anode side of the hydrogen production electrolytic cell.

[0085] In some embodiments, the gas-liquid mixture inlet 111 of the gas-liquid separator 100 can be connected to the cathode side of the hydrogen production electrolytic cell so that the gas-liquid mixture containing gas on the cathode side flows into the gas-liquid separator 100. In other words, the gas-liquid mixture containing gas (including hydrogen) from the cathode side of the hydrogen production electrolytic cell flows into one side of the nozzle 150 of the gas-liquid separator 100 through the gas-liquid mixture inlet 111 and is ejected from the spray holes 151 on the other side of the nozzle 150 of the gas-liquid separator 100. The gas-liquid separator 100 is used to wash, separate and cool the gas-liquid mixture containing gas from the cathode side, produce hydrogen products and recover the alkaline liquid on the cathode side.

[0086] In some other embodiments, the gas-liquid mixture inlet 111 of the gas-liquid separator 100 can be connected to the anode side of the hydrogen production electrolytic cell so that the gas-liquid mixture containing gas on the anode side flows into the gas-liquid separator 100. In other words, the gas-liquid mixture containing gas (including oxygen) from the anode side of the hydrogen production electrolytic cell flows into one side of the nozzle 150 of the gas-liquid separator 100 through the gas-liquid mixture inlet 111 and is ejected from the spray holes 151 on the other side of the nozzle 150 of the gas-liquid separator 100. The gas-liquid separator 100 is used to wash, separate and cool the gas-liquid mixture containing gas from the anode side, produce oxygen products and recover the alkaline liquid on the anode side.

[0087] The electrolytic water hydrogen production system according to the second aspect of the present utility model can achieve similar technical effects to the gas-liquid separator in the above first aspect. It can be understood that the electrolytic water hydrogen production system according to the present utility model includes all the features and effects of the gas-liquid separator according to the present utility model.

[0088] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The features described in one embodiment herein can be applied alone or in combination with other features in another embodiment, unless the feature is not applicable or otherwise stated in that other embodiment.

[0089] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for the purpose of exemplification and illustration, and the present utility model is not limited to the above embodiments. According to the teachings of the present utility model, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection required by the present utility model.

Claims

1. A gas-liquid separator for connecting to a hydrogen production electrolyzer, characterized in that, The gas-liquid separator includes: a housing, inside which a primary gas-liquid separation chamber is provided; a spray head, which is arranged in the primary gas-liquid separation chamber and is spaced from the bottom of the primary gas-liquid separation chamber by a predetermined distance; a washing tank, which is arranged inside the housing, the washing tank includes a receiving space for receiving washing liquid, the washing tank is located above the primary gas-liquid separation chamber, and the receiving space of the washing tank communicates with the primary gas-liquid separation chamber; and a cooling coil, which extends in the height direction and surrounds the outer wall of the housing.

2. The gas-liquid separator according to claim 1, characterized in that, The housing is provided with a gas-liquid mixture inlet; One side of the spray head communicates with the gas-liquid mixture inlet, and the other side of the spray head is configured to be annular extending along the circumferential direction of the housing; A plurality of spray holes are spacedly provided on the side of the spray head away from the gas-liquid mixture inlet.

3. The gas-liquid separator according to claim 1, wherein, The washing tank includes a tank wall surrounding the receiving space, and the gas-liquid separator further includes a connecting wall; The connecting wall is sealingly connected between the upper part of the tank wall and the inner wall of the housing, so that the tank wall, the connecting wall and the inner wall of the housing below the connecting wall define the primary gas-liquid separation chamber.

4. The gas-liquid separator according to claim 3, characterized in that, The tank wall is provided with a communication port allowing gas to enter the receiving space from the primary gas-liquid separation chamber; A first channel is arranged in the washing tank, the first channel communicates with the communication port and extends from the communication port to the bottom of the washing tank.

5. The gas-liquid separator according to claim 4, characterized in that, The tank wall is further provided with an overflow port; The opening position of the overflow port is lower than that of the communication port; and / or A second channel is arranged in the primary gas-liquid separation chamber, the second channel communicates with the overflow port and extends from the overflow port to the bottom of the primary gas-liquid separation chamber.

6. The gas-liquid separator according to claim 1, wherein, The gas-liquid separator further includes a demister, which is located inside the housing and above the washing tank, and the periphery of the demister is sealed with the inner wall of the housing.

7. The gas-liquid separator according to claim 6, wherein, The housing is further provided with a gas outlet, and the gas outlet is located above the demister.

8. The gas-liquid separator according to any one of claims 1-7, characterized in that The housing is further provided with a washing liquid inlet, and the washing liquid inlet communicates with the receiving space of the washing tank; and / or The housing is further provided with an alkali liquid outlet, the alkali liquid outlet communicates with the primary gas-liquid separation chamber, and the opening position of the alkali liquid outlet is lower than that of the spray head.

9. The gas-liquid separator according to any one of claims 1-7, characterized in that, The housing includes a cylinder body, an upper head and a lower head. The upper opening of the cylinder body is closed by the upper head, and the lower opening of the cylinder body is closed by the lower head. The upper and lower ends of the cooling coil respectively have a cooling water outlet and a cooling water inlet corresponding thereto, and the dimension of the cooling coil in the height direction is the same as the dimension of the cylinder body in the height direction.

10. An electrolytic water hydrogen production system, characterized in that, including: a hydrogen production electrolytic cell; and the gas-liquid separator according to any one of claims 1-9, and the gas-liquid mixture inlet of the gas-liquid separator is connected to the cathode side and / or the anode side of the hydrogen production electrolytic cell.

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