Gas-liquid separator for electrolytic hydrogen production and system thereof

Abstract

The application discloses a gas-liquid separator for electrolytic hydrogen production and a system thereof, which comprises a tank body, an inside of which is provided with an entering area, a drop area and a liquid return area which are independent of each other; a flow guide mechanism, which comprises a gas-liquid distribution disc arranged in the entering area and an inlet packing part arranged between the gas-liquid distribution disc and the drop area; and a drop mechanism, which comprises a triangular weir groove arranged in the inside of the drop area, a water holding groove arranged below the triangular weir groove and a drop well which is communicated between the water holding groove and the liquid return area. The gas-liquid mixture entering the tank body will not be introduced into the inside of the liquid contained in the tank body itself, and after separation, the gas-liquid mixture is collected into the liquid in the inside of the tank body in a slow flow manner, so that the liquid fluctuation problem in the inside of the tank body is reduced, the water replenishing opening is prevented from frequently starting and stopping due to the liquid level fluctuation, and the problems of waste material and control error of the signal acquisition and PLC control system are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas-liquid separators, in particular to a gas-liquid separator for electrolytic hydrogen production and a system thereof. BACKGROUND

[0002] Currently, in the field of electrolytic hydrogen production, when hydrogen is produced by an electrolysis system, a high-temperature gas-liquid mixture is produced from an electrolytic cell and cannot be directly used for production or storage. Therefore, separation and purification are required to achieve the corresponding dryness of the gas and the corresponding purity of the product. The gas-liquid separator for electrolytic hydrogen production is a system for separating the high-temperature gas-liquid mixture. Since hydrogen production must go through gas-liquid separation, the quality of the separation system will directly determine the material consumption, energy consumption level, separation gas quality, control system complexity, and other factors during the production process and subsequent purification process. In addition, it also involves the complexity of equipment structure and materials, the difficulty of welding manufacturing, and the manufacturing process of the skid-mounted equipment.

[0003] The traditional separation equipment directly inserts the bubbling, causing the liquid surface of the separator to fluctuate violently, and the inaccurate liquid level leads to frequent start and stop of the material supplement pump and its valve, which not only wastes materials but also causes signal acquisition and PLC system control errors, resulting in safety hazards and a significant reduction in the service life of the operating mechanism.

[0004] In addition, the traditional separation system is composed of multiple subsystems, including gas washing, condensation water removal, and mist water droplet removal, which are the main process equipment parts. The functional equipment is connected by pipelines / flanges and is a single separation device, which is difficult to integrate and miniaturize, occupies a large space, has a large height after integration and skid mounting, and has high maintenance and manufacturing costs. SUMMARY

[0005] In view of the problem of violent fluctuation of the liquid surface of the separator in the prior art, the present application is proposed.

[0006] Therefore, the purpose of the present application is to provide a gas-liquid separator for electrolytic hydrogen production.

[0007] To solve the above technical problems, the present application provides the following technical solution: a tank body having an independent entering area, a drop area, and a liquid return area on the inside; a flow guide mechanism including a gas-liquid distribution disc in the entering area and an inlet filler between the gas-liquid distribution disc and the drop area; and a drop mechanism including a triangular weir groove on the inside of the drop area, a water tank below the triangular weir groove, and a drop well connecting the water tank and the liquid return area; the triangular weir groove and the entering area are connected.

[0008] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0009] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0010] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0011] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0012] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0013] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0014] As a preferred scheme of the gas-liquid separator for hydrogen production by electrolysis, the gas-liquid distribution disc comprises a distribution disc body arranged inside the inlet area, gas-liquid guide outlets arranged in a ring shape on the distribution disc body, a sealing plate arranged on the distribution disc body, and a bubbling head detachably arranged on the gas-liquid guide outlets; when the gas-liquid mixture passes through the inlet area, it enters the inside of the distribution disc body and is uniformly discharged through the bubbling head.

[0015] The electrolytic hydrogen production gas-liquid separator has the beneficial effects that when the device is used, the gas-liquid mixture entering the tank body is not directly introduced into the liquid inside the tank body, and after separation, the gas-liquid mixture is introduced into the liquid inside the tank body in a slow flow manner, thereby reducing the liquid fluctuation problem inside the tank body, avoiding frequent opening and closing of the water supply port caused by liquid level fluctuation, and resolving the problems of waste material and control error of the signal acquisition and control system.

[0016] The electrolytic hydrogen production gas-liquid separation system also includes a pre-cooler arranged at the inlet of the tank body and a demister connected to the outlet of the tank body.

[0017] As a preferred scheme of the electrolytic hydrogen production gas-liquid separation system, the demister is further provided with a liquid pipe connected to the tank body.

[0018] The electrolytic hydrogen production gas-liquid separation system has the beneficial effects that the triangular weir groove, the water tank and the flow guide mechanism are arranged to prevent the gas-liquid mixture entering the tank body from being introduced into the liquid inside the tank body, and after separation, the gas-liquid mixture is introduced into the liquid inside the tank body in a slow flow manner, thereby reducing the liquid fluctuation problem inside the tank body, avoiding frequent opening and closing of the water supply port caused by liquid level fluctuation, and resolving the problems of waste material and control error of the signal acquisition and PLC control system. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the electrolytic hydrogen production gas-liquid separator.

[0021] Figure 2 It is a schematic diagram of the gas-liquid distribution disc structure.

[0022] Figure 3 It is a schematic diagram of the bubble head structure.

[0023] Figure 4 It is a side view of the internal structure of the electrolytic hydrogen production gas-liquid separator.

[0024] Figure 5 It is a schematic diagram of the gas condensing mechanism structure.

[0025] Figure 6 Fig. 1 is a schematic view of a valve plate and a floating valve structure in the present application.

[0026] Figure 7 Fig. 2 is a schematic view of a floating valve and a floating cap structure in the present application.

[0027] Figure 8 Fig. 3 is a schematic view of a gas-liquid separation system for electrolytic hydrogen production in the present application. Figure 7 Fig. 4 is an enlarged view of A in Fig. 3.

[0028] Figure 9 Fig. 5 is a schematic view of a gas-liquid separation system for electrolytic hydrogen production in the present application. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other than the described implementations, and that the present application can be practiced with different or additional components. Thus, the present application is not intended to be limited to the particular implementations described herein.

[0031] Secondly, the term "one embodiment" or "an embodiment" as used herein means that a particular implementation can include, but does not require, each and every feature, structure, or characteristic described herein. Therefore, the description herein of "one embodiment" or "an embodiment" does not necessarily refer to the same embodiment, although it can. Furthermore, to the extent that the description herein refers to a particular feature, structure, or characteristic, this does not mean that this feature, structure, or characteristic is required in all embodiments.

[0032] Thirdly, the present application is described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the sectional views of the device structure are partially enlarged without the general scale for the convenience of description, and the schematic views are only examples, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0033] Example 1

[0034] Reference Signs List Figure 1The utility model provides a kind of gas-liquid separator for electrolytic hydrogen production, including tank body 100, its inside has mutually independent entering area 101, drop area 102 and liquid reflux area 103, wherein the bottom of tank body 100 has inlet 104, inlet 104 is connected with hydrogen production electrolytic cell, gas-liquid mixture enters the inside of tank body 100 by inlet 104, gas-liquid mixture in the inside of tank body 100 reaches entering area 101, after preliminary processing in the inside of entering area 101, reaches drop area 102, completes drop separation in the inside of drop area 102, and finally gas is discharged from drop area 102, and liquid flows to the inside of liquid reflux area 103 from drop area 102 again.

[0035] Flow guide mechanism 200 includes gas-liquid distribution disc 201 arranged in entering area 101 and inlet filler 202 arranged between gas-liquid distribution disc 201 and drop area 102, gas-liquid mixture reaches gas-liquid distribution disc 201 after entering from inlet 104, and fine bubbles are released after bubbles are cut, which greatly reduces the negative effects of water level fluctuation and impact caused by large bubbles generated by traditional equipment, and the inlet filler 202 is nickel mesh filler, which cuts bubbles again.

[0036] And drop mechanism 300 includes triangular weir groove 301 arranged in the inside of drop area 102, water tank 302 arranged below triangular weir groove 301 and drop well 303 connecting water tank 302 and liquid reflux area 103, triangular weir groove 301 is connected with entering area 101, gas-liquid mixture in entering area 101 reaches triangular weir groove 301, liquid flows out of triangular weir groove 301 and falls on water tank 302 after liquid level in the inside of triangular weir groove 301 rises, to complete drop energy removal, water in the inside of water tank 302 falls into the inside of drop well 303 under the action of gravity, flows to liquid reflux area 103 through drop well 303, and gas is separated above triangular weir groove 301.

[0037] Traditional electrolytic cell gas-liquid separator is mostly designed in split structure, with large floor area, high height and poor separation effect. The separation equipment in the utility model adopts multi-stage separation form, cuts bubbles through gas-liquid distribution disc 201 and inlet filler 202, and makes bubbles uniformly distributed, effectively improves separation effect through overflow drop of triangular weir groove 301, and can complete good gas-liquid separation effect in limited space.

[0038] Example 2

[0039] Reference Figures 1 to 4The embodiment is different from the first embodiment in that the gas-liquid distribution disc 201 comprises a distribution disc body 201a arranged inside the inlet area 101, gas-liquid guide outlets 201b arranged in a ring shape on the distribution disc body 201a, a sealing plate 201c arranged on the distribution disc body 201a, and a bubbling head 201d detachably arranged on the gas-liquid guide outlets 201b. When the gas-liquid mixture passes through the inlet area 101, it enters the inside of the distribution disc body 201a and is uniformly discharged through the bubbling head 201d.

[0040] The chamber of the inlet area 101 is a cylindrical space connected with the inlet 104 of the tank body 100, and the distribution disc body 201a is a circular structure with its outer wall adhering to the inner wall of the inlet area 101 to reduce the gap. The distribution disc body 201a mainly comprises a ring-shaped disc body, a cross-shaped reinforcing body arranged on the inside of the disc body, and the sealing plate 201c arranged between the cross-shaped reinforcing body and the ring-shaped disc body to reduce the gap. The gas-liquid guide outlets 201b pass through the distribution disc body 201a, and the end of the gas-liquid guide outlets 201b close to the inlet 104 of the tank body 100 is open, and the end of the gas-liquid guide outlets 201b away from the inlet 104 of the tank body 100 is provided with the bubbling head 201d. After the gas-liquid mixture enters the inlet 104 of the tank body 100, it needs to pass through the distribution disc body 201a and enter the inside of the gas-liquid guide outlets 201b, and then pass through the gas-liquid guide outlets 201b and finally pass through the bubbling head 201d to be discharged. The gas in the gas-liquid mixture is divided into small bubbles and uniformly dispersed above the distribution disc body 201a.

[0041] The end of the gas-liquid guide outlets 201b away from the inlet 104 of the tank body 100 is provided with an internal thread, and the end of the bubbling head 201d is a threaded pipe 201d-1. The bubbling head 201d can be detachably arranged on the inside of the gas-liquid guide outlets 201b through the threaded pipe 201d-1. After the gas-liquid mixture uniformly flows out of the gas-liquid guide outlets 201b, it enters the inside of the bubbling head 201d through the threaded pipe 201d-1. The top of the bubbling head 201d is provided with a mesh 201d-2. The gas in the gas-liquid mixture is cut and separated into small bubbles through the mesh 201d-2.

[0042] Specifically, the flow guide mechanism 200 further comprises a lower trumpet mouth 203 arranged below the gas-liquid distribution disc 201 and an upper trumpet mouth 204 arranged above the inlet packing 202. The upper trumpet mouth 204 is connected with the triangular weir groove 301.

[0043] The lower trumpet mouth 203 is connected with the inlet 104 of the tank body 100, and the end of the lower trumpet mouth 203 close to the gas-liquid distribution disc 201 gradually reduces in diameter. The end of the upper trumpet mouth 204 close to the inlet area 101 is connected with the inlet area 101, and the end of the upper trumpet mouth 204 away from the gas-liquid distribution disc 201 is connected with the triangular weir groove 301. The end of the upper trumpet mouth 204 away from the gas-liquid distribution disc 201 gradually increases in diameter.

[0044] In this way, when the gas-liquid mixture passes through the lower bell mouth 203, the speed will increase, and the gas-liquid distribution disc 201 and the inlet packing piece 202 can quickly pass through the gas-liquid mixture, so that the inlet packing piece 202 and the bubble head 201d can quickly cut the gas in the gas-liquid mixture into fine bubbles, and through the gradually expanding structure design of the upper bell mouth 204, the flow rate of the gas-liquid mixture passing through the upper bell mouth 204 can be slowed down, the gas can be effectively separated from the liquid, and the liquid can flow slowly to the inside of the triangular weir groove 301, uniformly distributed on the triangular weir groove 301, and completed on the triangular weir groove 301.

[0045] The water inlet 105 is arranged above the triangular weir groove 301 on the tank body 100, and the water enters the inside of the triangular weir groove 301 through the water inlet 105, which can reduce the average temperature of the liquid on the triangular weir groove 301, and can also supplement the electrolytic raw material.

[0046] The water inlet 105 is connected to the water supplement pump, and the water supplement pump is controlled by the PLC control system. The liquid level meter installed on the tank body 100 can measure the liquid level in the tank body 100, and the PLC control system can determine whether to supplement liquid into the tank body 100 through the water inlet 105 according to the liquid level data.

[0047] The drop well 303 is arranged at the bottom of the water tank 302, the top of the drop well 303 is connected to the water tank 302, and the connection between the drop well 303 and the water tank 302 is rounded, so that the water in the water tank 302 can flow slowly to the inside of the drop well 303, and the nickel mesh packing 304 is arranged at the bottom of the drop well 303. The water entering the inside of the drop well 303 can be buffered by the nickel mesh packing 304 arranged at the bottom of the drop well 303, and the water in the drop well 303 can complete the wall adhesion and buffering energy dissipation, and then enter the inside of the liquid return area 103.

[0048] Further, the width of the triangular weir groove 301 is smaller than the width of the water tank 302, and the triangular weir groove 301 is covered by the water tank 302, so that the water falling from the triangular weir groove 301 can directly enter the inside of the water tank 302, so that the water falling from the triangular weir groove 301 can be stably caught by the water tank 302, and finally enter the liquid return area 103 through the drop well 303.

[0049] In addition, because the triangular weir groove 301 and the water tank 302 separate the liquid space after separation and its gas space, the space occupied by the gas is mainly above the triangular weir groove 301, and the space occupied by the liquid is mainly below the water tank 302. Through the structural design of the triangular weir groove 301, the water tank 302, and the flow guide mechanism 200, the gas-liquid mixture entering the tank body 100 cannot be introduced into the inside of the liquid contained in the tank body 100 itself, and after separation, the gas-liquid mixture flows into the liquid inside the tank body 100 in a slow flow manner, thereby reducing the liquid fluctuation problem inside the tank body 100 and avoiding frequent start-stop of the water replenishment port 105 caused by liquid level fluctuation, thereby resolving the problem of waste material and causing signal acquisition and PLC control system control error.

[0050] The remaining structures are the same as those of Example 1.

[0051] Example 3

[0052] Reference Figure 1 and Figures 5 to 8 The difference between this example and the above examples is that it further includes a gas condensing mechanism 400, which includes a body 401 connected to the tank body 100, an inner side of which is provided with a baffle group 401a; a valve plate 402 is arranged at the bottom of the body 401, a plurality of valve holes 402a are formed in the valve plate 402; a floating valve 403 is arranged on the valve plate 402, and the position corresponds to the valve hole 402a; and a floating cap 404 is slidingly arranged on the floating valve 403.

[0053] A connecting port 106 is formed at the top of the tank body 100, the bottom of the body 401 is connected to the connecting port 106, and the separated gas can enter the inside of the body 401 through the connecting port 106, wherein the connecting port 106 is made of insulating and heat insulating material, and the insulating and heat insulating material is PTFE or PPS. After the gas enters the inside of the body 401, it can be separated by the baffle group 401a and discharged from the top of the body 401, and the remaining liquid is separated and flows back to the bottom of the body 401.

[0054] In the process of the gas entering the body 401 through the connecting port 106, it will first pass through the valve plate 402, when it reaches the valve plate 402, the gas enters the inside of the floating valve 403 through the valve hole 402a, and finally is discharged from the top of the floating valve 403. The top of the floating valve 403 is higher than the valve plate 402, when the gas is separated by the baffle group 401a in the inside of the body 401, the liquid falls back to the top of the valve plate 402. When the liquid falls back, the floating cap 404 can prevent the liquid from directly falling back to the inside of the floating valve 403, and the floating valve 403 which is higher than the valve plate 402 can also prevent the liquid accumulated on the valve plate 402 from flowing back from the valve hole 402a.

[0055] Specifically, the floating valve 403 comprises a positioning outer layer 403a fixed to the valve plate 402, a following middle layer 403b slidingly arranged inside the positioning outer layer 403a, and a floating inner layer 403c slidingly arranged inside the following middle layer 403b and having an opening at the top, and an inner retraction flow guide member 403d arranged at the opening of the floating inner layer 403c. The positioning outer layer 403a, the following middle layer 403b, and the floating inner layer 403c all have a ring structure and a taper.

[0056] The positioning outer layer 403a, the following middle layer 403b, and the floating inner layer 403c of the floating valve 403 are all tubular structures with a taper, and after being sleeved together, a part of the following middle layer 403b can extend to the outside of the positioning outer layer 403a through the taper, a part of the floating inner layer 403c can extend to the outside of the following middle layer 403b through the taper, and the following middle layer 403b cannot completely separate from the inside of the positioning outer layer 403a, and the floating inner layer 403c cannot completely separate from the inside of the following middle layer 403b.

[0057] When the gas flow rate through the floating valve 403 is small, the inner retraction flow guide member 403d cannot drive the floating inner layer 403c to move upward, and when the gas flow rate through the floating valve 403 is large, the gas flow pushes the floating inner layer 403c in the floating valve 403 through the inner retraction flow guide member 403d, and the floating inner layer 403c moves upward. Of course, as the gas flow rate through the floating valve 403 increases, the pushing force of the inner retraction flow guide member 403d on the floating inner layer 403c also increases, and the following middle layer 403b can also be driven by the floating inner layer 403c to move upward during the upward movement of the floating inner layer 403c, thereby further increasing the length of the floating valve 403. The design purpose of this scheme is to increase the length of the floating valve 403 as the gas flow rate inside the floating valve 403 increases, so that more liquid is separated when the gas flow rate is faster, and more liquid reaches the valve plate 402. Therefore, through the design of the floating valve 403, the problem of the liquid level on the valve plate 402 being too high to submerge the floating valve 403 when the gas flow rate is fast is avoided.

[0058] Further, the floating cap 404 comprises a limiting hollow ring 404a sleeved outside the floating inner layer 403c, a hollow rod 404b fixed to the limiting hollow ring 404a, an umbrella cap 404c arranged at the top of the hollow rod 404b, a hollow floating ring 404d arranged at the bottom of the hollow rod 404b, and a movable lock 403e arranged outside the floating inner layer 403c of the floating valve 403.

[0059] The limiting hollow ring 404a is sleeved on the outside of the floating inner layer 403c, and the movable lock buckle 403e can prevent the limiting hollow ring 404a from being separated from the outside of the floating inner layer 403c. The design purpose of the umbrella cap 404c is that after being separated from the floating inner layer 403c, the umbrella cap 404c is hit, the moving direction of the gas is changed through the umbrella cap 404c, so that the initial upward speed of the gas is reduced when the gas is separated from the umbrella cap 404c, the liquid content in the gas is effectively reduced, and the gas can complete preliminary liquid separation when being separated from the umbrella cap 404c.

[0060] Of course, another function of the umbrella cap 404c is to protect above the floating inner layer 403c. When the gas passes through the baffle group 401a, the separated liquid will fall under the action of gravity. Before reaching the valve plate 402, the liquid corresponding to the valve hole 402a position will hit the umbrella cap 404c, and finally slide from the umbrella cap 404c upper surface to the valve plate 402, avoiding the problem that the liquid directly enters the inside of the valve hole 402a when falling.

[0061] Among them, the purpose of the hollow floating ring 404d is to provide buoyancy, and the hollow floating ring 404d can float on the surface of the liquid on the valve plate 402. When the liquid on the valve plate 402 rises, the hollow floating ring 404d will also move upward, in the process, the hollow floating ring 404d pushes the umbrella cap 404c upward through the hollow rod 404b, at the same time, the hollow rod 404b drives the limiting hollow ring 404a to move upward, when the limiting hollow ring 404a contacts the movable lock buckle 403e, the movable lock buckle 403e can apply a pushing force to the floating inner layer 403c, so that the floating inner layer 403c can move upward, so that the position of the floating inner layer 403c is raised, avoiding the problem that the liquid enters the inside of the floating inner layer 403c, causing the valve hole 402a to backflow.

[0062] Through the above scheme, the airflow speed is increased, the overall length of the floating valve 403 can be increased, and when the liquid level above the valve plate 402 rises, the overall length of the floating valve 403 can also be increased.

[0063] The movable lock buckle 403e includes a triangular buckle 403e-1 connected with the floating inner layer 403c in sliding mode, and a spring 403e-2 installed between the triangular buckle 403e-1 and the floating inner layer 403c. The inclined surface of the triangular buckle 403e-1 faces upward, and the plane of the triangular buckle 403e-1 faces the limiting hollow ring 404a. When the limiting hollow ring 404a moves upward, it will touch the plane of the triangular buckle 403e-1, so that it cannot pass through. When the limiting hollow ring 404a is installed, it will press the inclined surface of the triangular buckle 403e-1. The triangular buckle 403e-1 can resist the spring 403e-2, so that the triangular buckle 403e-1 can retract to the inside of the side wall of the floating inner layer 403c, and the limiting hollow ring 404a can be smoothly installed below the triangular buckle 403e-1.

[0064] Further, the bottom of the device body 401 is also provided with a backflow pipe 405 connected with the tank body 100.

[0065] The position of the backflow pipe 405 is above the valve plate 402. The liquid accumulated on the valve plate 402 can flow back to the inside of the tank body 100 through the backflow pipe 405. Through the above scheme, the electrolytic hydrogen production gas-liquid separator can adaptively adjust the fluctuation of the gas entering amount caused by the fluctuating load during operation.

[0066] The remaining structures are the same as those of Example 2.

[0067] Example 4

[0068] Referring to Figure 9 The difference between this example and the above examples is that the electrolytic hydrogen production gas-liquid separation system includes the electrolytic hydrogen production gas-liquid separator in the above examples. It further includes a pre-cooler 500 arranged at the inlet 104 of the tank body 100, and a demister 600 connected with the outlet of the device body 401.

[0069] The inlet of the pre-cooler 500 is connected with the electrolytic cell, and the outlet of the pre-cooler 500 is connected with the inlet 104 of the tank body 100. Under normal circumstances, the temperature of the gas-liquid mixture entering the pre-cooler 500 is 85-90°C. The temperature of the gas-liquid mixture is adjusted to 70-80°C through the pre-cooler 500, and then the cooled gas-liquid mixture is sent into the inside of the tank body 100, so as to reduce the water vapor volatilized from the electrolyte in the tank body 100 due to the high temperature.

[0070] The inlet of the demister 600 is connected with the top outlet of the device body 401. After the gas completes condensation and gas-liquid separation in the inside of the device body 401, it enters the inside of the demister 600. The inside of the demister 600 is loaded with a nickel wire mesh packing 304 or a plastic mesh packing, which can separate the remaining liquid in the gas again.

[0071] Specifically, the demister 600 is further provided with a liquid pipe 601, which is connected with the tank body 100.

[0072] The liquid separated in the demister 600 is backflowed to the inside of the tank body 100 through the liquid pipe 601. In this system, the tank body 100 for separation and the vessel 401 for condensation are integrated, so that the space occupation of the whole system is reduced. Meanwhile, the gas obtained through the multiple gas-liquid separation of the tank body 100, the vessel 401 and the demister 600 is purer.

[0073] In addition, the outlet of the demister 600 is provided with a gas delivery pipe 602, which is used to deliver the gas finally separated to the outside purification unit G2. The inlet of the precooler 500 is connected with the electrolytic tank G1, and the gas-liquid mixture produced in the electrolytic tank G1 is introduced into the inside of the precooler 500. In addition, the tank body 100 is further provided with an electrolyte backflow port 107, and the electrolyte separated in the inside of the tank body 100 can be backflowed to the inside of the electrolytic tank G1 through the electrolyte backflow port 107, so as to continue the electrolysis.

[0074] The comparative experimental data of this embodiment and the conventional separator system are as follows:

[0075] Experimental Example 1

[0076] A 30 Nm 3 / h electrolytic tank system is used for testing, and the electrolytic hydrogen production gas-liquid separation system of the present application uses a 100 Nm 3 series, and the low-load separation effect and related data are determined.

[0077] Experimental Example 2

[0078] A 100 Nm 3 / h electrolytic tank system is used for testing, and the electrolytic hydrogen production gas-liquid separation system of the present application uses a 100 Nm 3 series, and the normal-load separation effect and related data are determined.

[0079] Experimental Example 3

[0080] A 150 Nm 3 / h electrolytic tank system is used for testing, and the electrolytic hydrogen production gas-liquid separation system of the present application uses a 100 Nm 3 series, and the normal-load separation effect and related data are determined.

[0081] Experimental Example 4

[0082] Using the same test system as in Experimental Example 2, the electrolyzer production power was changed from 100% to 10% to 110% to 100% at a rate of 5% design power / min (simulating maximum power fluctuation conditions), and the fluctuating gas was simulated to test the separation effect and related data.

[0083] Comparative Example 1

[0084] The same as the test conditions in Experimental Example 1, the separator used was 100 Nm 3 The conventional separator series was measured for normal load separation effect and related data.

[0085] Comparative Example 2

[0086] The same as the test conditions in Experimental Example 2, the separator used was 100 Nm 3 The conventional separator series was measured for normal load separation effect and related data.

[0087] Comparative Example 3

[0088] The same as the test conditions in Experimental Example 3, the separator used was 100 Nm 3 The conventional separator series was measured for normal load separation effect and related data.

[0089] Comparative Example 4

[0090] The same electrolyzer system as in Experimental Example 4 was used, but the separator used was a conventional separation system. The electrolyzer production power was changed from 100% to 10% to 110% to 100% at a rate of 5% design power / min (simulating maximum power fluctuation conditions), and the fluctuating gas was simulated to test the separation effect and related data.

[0091] The following is a summary table of test data.

[0092]

[0093] Gas purity: determined by online gas analyzer (gas chromatography); this value directly reflects the quality of the separation system, and high separation efficiency can effectively reduce hydrogen and oxygen cross-contamination, with high separation gas purity.

[0094] Electrolyte bulk temperature: determined by online temperature instrument, low electrolyte temperature can reduce safety hazards.

[0095] Dew point temperature: determined by online dew point instrument, representing the water content of the gas; this value directly reflects the quality of the separation system, and a low dew point indicates low water content in the gas, good water separation effect, and small subsequent purification load.

[0096] Temperature fluctuation rate: after stable gas flow operation, temperature signal is collected at 2 times / min, 200 temperature signal values are continuously collected, the fluctuation is calculated, the fluctuation rate (%) = 100*(liquid level signal maximum value-liquid level static actual value) / liquid level static actual value, the same size electrolytic cell is used under the same test conditions, and the test is carried out after the outlet gas flow is stable for 2 hours; stable temperature is conducive to the work of the cooling system.

[0097] Electrolyte density fluctuation rate (%): after stable gas flow operation, temperature signal is collected at 2 times / min, 200 electrolyte density signal values are continuously collected, the fluctuation is calculated, the fluctuation rate (%) = 100*(density signal maximum value-density static actual value) / density static actual value, the same size electrolytic cell is used under the same test conditions, and the test is carried out after the outlet gas flow is stable for 2 hours; stable electrolyte density is conducive to reflecting the dissolved gas concentration and fluctuation in the electrolyte, and can effectively prevent gas mutual penetration.

[0098] Internal pressure fluctuation rate (%): after stable gas flow operation, temperature signal is collected at 2 times / min, 200 pressure density signal values are continuously collected, the fluctuation is calculated, the fluctuation rate (%) = 100*(pressure signal maximum value-pressure static actual value) / pressure static actual value, the same size electrolytic cell is used under the same test conditions, and the test is carried out after the outlet gas flow is stable for 2 hours; stable internal pressure is conducive to reducing the start-stop and impact of the pressure control valve system.

[0099] Water (electrolyte) consumption (kg / m 3 H2): The amount of raw material water required for the production of unit volume of hydrogen, which is determined by the mass of the water storage raw material tank after stable gas flow operation; water consumption directly reflects the material consumption level, and a good separator consumes less material.

[0100] Comprehensive energy consumption of the separator (including the corresponding electrolytic cell system) (kW.h / Nm 3 ): The electrolytic cell and its separation system include the sum of pump energy consumption, refrigeration capacity electric energy consumption, and electrolytic cell power consumption; the energy consumption of the reaction separator and its energy saving comprehensive level.

[0101] From the table and its analysis test data, it can be seen that the separation system structure form adopted in the application effectively reduces the space volume of the separator, has good separation effect, high gas purity and low dew point; can effectively reduce the electrolyte temperature, reduce the safety hidden danger, the special flow channel and water tank structure design can greatly eliminate the influence of excessive bubbles (vibration and water level fluctuation caused by its rupture, etc.) on the precision of instruments and meters, and the unique structure design can basically eliminate the unstable fluctuation of the instruments, the measurement data of the separator instruments are accurate, the service life of the automatic control valve (the number of switching times is reduced) is greatly prolonged, and the use of subsequent heat exchange, materials and energy is also reduced, thereby saving resources.

[0102] In addition, the industrial adaptability is good, the anti-fluctuation effect is good, and a higher load bearing range can be applied to fluctuation working conditions of renewable energy.

[0103] The rest of the structure is the same as that of Example 3.

[0104] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are illustrative only. Although several embodiments have been described in detail herein, many modifications are possible to one having ordinary skill in the art. For example, the relative dimensions of the various elements can be interchanged, with either being larger or smaller, the locations can be reversed, and certain features of one embodiment can be incorporated into an alternative embodiment. Therefore, the application is not limited to the specific embodiments disclosed. It is therefore contemplated to cover by the present application any and all modifications, variations, or equivalents that fall within the scope of the present application. Accordingly, the application is intended to embrace all alternatives, modifications and variations which fall within the scope of the appended claims. It is intended that each element recited in the claims covers all the equivalent elements or modifications of the elements. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.

[0105] In addition, for the purpose of providing a concise description of exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the best mode of carrying out the application currently being considered, or those unrelated to enabling the application).

[0106] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can be complex and time-consuming, but would be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0107] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A gas-liquid separator for hydrogen production by electrolysis, characterized by: The utility model relates to a gas-liquid separation device, including, a tank body (100) with an independent inlet area (101), a drop area (102), and a liquid return area (103) on the inside; a flow guide mechanism (200) including a gas-liquid distribution disc (201) in the inlet area (101) and an inlet filler (202) between the gas-liquid distribution disc (201) and the drop area (102); and a drop mechanism (300) including a triangular weir groove (301) on the inside of the drop area (102), a water collecting groove (302) below the triangular weir groove (301), and a drop well (303) connecting the water collecting groove (302) and the liquid return area (103); the triangular weir groove (301) and the inlet area (101) are connected; a gas condensing mechanism (400) is further included, which includes a device body (401) connected to the tank body (100) and having a baffle group (401a) on the inside; a valve plate (402) at the bottom of the device body (401), with multiple valve holes (402a) on the valve plate (402); a floating valve (403) on the valve plate (402) corresponding to the valve holes (402a); a floating cap (404) slidingly arranged on the floating valve (403); the floating valve (403) includes a positioning outer layer (403a) fixed to the valve plate (402); a following middle layer (403b) slidingly arranged on the inside of the positioning outer layer (403a); a floating inner layer (403c) slidingly arranged on the inside of the following middle layer (403b) and having an opening on the top; an inwardly retracting flow guide member (403d) arranged at the opening of the floating inner layer (403c); the positioning outer layer (403a), the following middle layer (403b), and the floating inner layer (403c) are all annular structures, and all have a taper; the floating cap (404) includes a limiting hollow ring (404a) sleeved on the outside of the floating inner layer (403c); a hollow rod (404b) fixed to the limiting hollow ring (404a); an umbrella cap (404c) on the top of the hollow rod (404b); a hollow floating ring (404d) on the bottom of the hollow rod (404b); the floating valve (403) has a movable lock (403e) on the outside of the floating inner layer (403c); the movable lock (403e) includes a triangular buckle (403e-1) slidingly connected to the floating inner layer (403c) and a spring (403e-2) installed between the triangular buckle (403e-1) and the floating inner layer (403c). The gas-liquid mixture enters the inside of the tank body (100) through the inlet (104), and the gas-liquid mixture entering the inside of the tank body (100) reaches the entering area (101), and after being preliminarily treated in the inside of the entering area (101), reaches the drop water area (102), and the drop water separation is completed in the inside of the drop water area (102).

2. The gas-liquid separator for hydrogen production by electrolysis according to claim 1, characterized by: The gas-liquid distribution disc (201) comprises, a distribution disc body (201a) arranged in the inside of the entering area (101); a gas-liquid guide outlet (201b) annularly arranged on the distribution disc body (201a); a sealing plate (201c) arranged on the distribution disc body (201a); a bubbling head (201d) detachably arranged on the gas-liquid guide outlet (201b); When the gas-liquid mixture passes through the entering area (101), it enters the inside of the distribution disc body (201a) and is uniformly discharged through the bubbling head (201d).

3. The gas-liquid separator for hydrogen production by electrolysis according to claim 2, characterized by: The flow guide mechanism (200) further comprises a lower horn mouth (203) arranged below the gas-liquid distribution disc (201), and an upper horn mouth (204) arranged above the inlet packing (202); The upper horn mouth (204) is connected with the triangular weir groove (301).

4. The gas-liquid separator for hydrogen production by electrolysis according to claim 3, characterized by: The width of the triangular weir groove (301) is smaller than the width of the water holding groove (302).

5. The gas-liquid separator for hydrogen production by electrolysis according to claim 4, characterized by: The bottom of the device body (401) is further provided with a backflow pipe (405) connected with the tank body (100).

6. A gas-liquid separation system for hydrogen production by electrolysis, characterized by: The gas-liquid separator for electrolytic hydrogen production comprises the gas-liquid separator according to claim 5, and further comprises, a pre-cooler (500) arranged at the inlet (104) of the tank body (100); a demister (600) connected with the outlet of the device body (401).

7. The gas-liquid separation system for hydrogen production by electrolysis according to claim 6, characterized by: The demister (600) is further provided with a liquid pipe (601) connected with the tank body (100). The demister (600) is further provided with a liquid pipe (601) connected with the tank body (100).

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