A gas-liquid separator, a hydrogen production device based on the separator, and a separation method

Abstract

The present invention relates to the technical field of gas-liquid separation equipment, and discloses a gas-liquid separator, a hydrogen production device based on the separator, and a separation method, comprising an outer tank body, an inner tank body is arranged inside the outer tank body, an outer tank gas-liquid input pipe is fixedly installed at one end of the outer tank body, an inner tank gas-liquid input pipe is fixedly installed at one end of the inner tank body, an outer tank exhaust pipe and an outer tank liquid discharge pipe communicating with the interior of the outer tank body are fixedly installed at the upper and lower ends of the outer tank body, and an inner tank exhaust pipe and an inner tank liquid discharge pipe communicating with the interior of the inner tank body are fixedly installed at the upper and lower ends of the inner tank body; the inner tank gas-liquid input pipe, the inner tank exhaust pipe and the inner tank liquid discharge pipe all penetrate the outer tank body and extend to the outside of the outer tank body, and a slow flow structure is arranged inside the outer tank body and the inner tank body. The gas-liquid separator can simultaneously introduce a gas-liquid mixture of two gases generated by an electrolyzer for gas-liquid separation, without the need to use two gas-liquid separators at the same time to dehydrate hydrogen and oxygen respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid separation equipment, and in particular to a gas-liquid separator, a hydrogen production device based on the separator, and a separation method. Background Art

[0002] When hydrogen is produced by electrolysis of water, two products, hydrogen and oxygen, are produced in the electrolyzer. At the same time, a certain amount of water vapor will be mixed in the hydrogen and oxygen products. Therefore, in the water electrolysis hydrogen production device, the generated hydrogen needs to be separated into gas and liquid.

[0003] In a Chinese patent with publication number CN117654228B, a gas-liquid separator and a water electrolysis hydrogen production system are disclosed. A spiral cold medium circulation pipe is arranged inside the separation tank to transport the cold medium. When the gas enters the separation tank and floats upward, the gas can be quickly cooled, so that the moisture in the gas condenses into large water droplets and is separated from the hydrogen.

[0004] In the current industrialized water electrolysis hydrogen production industry, in order to achieve better economic benefits, the by-product oxygen will also be purified and collected. When the above-mentioned gas-liquid separator is used for gas-liquid separation in the water electrolysis hydrogen production system, hydrogen and oxygen cannot be collected at the same time. Two gas-liquid separators need to be installed to purify the hydrogen and oxygen produced in the electrolyzer respectively. The two gas-liquid separators are assembled separately and occupy a large space, which brings difficulties to the layout of equipment and pipelines. At the same time, when water is electrolyzed to produce gas, due to the violent reaction effect, a large number of tiny bubbles will be generated in the gas-liquid mixture. These bubbles will be mixed in the water flow and cannot be quickly separated from the water. They may be discharged directly from the separation tank with the water flow. At the same time, when the water body flows rapidly, the air pressure on the water surface will be reduced. With the surface tension of the water, the air can be sucked into the water flow to form bubbles. Since the above-mentioned device does not control the flow rate of the liquid, bubbles may flow out of the gas-liquid separator together with the liquid, causing the gas to be discharged together with the water flow. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a gas-liquid separator, a hydrogen production device based on the separator, and a separation method, which have the advantages of simultaneous gas-liquid separation of hydrogen-water mixture and oxygen-water mixture and high separation efficiency, and solve the problems mentioned in the above background technology.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A gas-liquid separator comprises an outer tank body, an inner tank body is arranged inside the outer tank body, an outer tank gas-liquid input pipe is fixedly installed at one end of the outer tank body, and an inner tank gas-liquid input pipe is fixedly installed at one end of the inner tank body, an outer tank exhaust pipe and an outer tank liquid discharge pipe communicating with the interior of the outer tank body are fixedly installed at the upper and lower ends of the outer tank body, and an inner tank exhaust pipe and an inner tank liquid discharge pipe communicating with the interior of the inner tank body are fixedly installed at the upper and lower ends of the inner tank body, respectively, the inner tank gas-liquid input pipe, the inner tank exhaust pipe and the inner tank liquid discharge pipe all penetrate the outer tank body and extend to the outside of the outer tank body, and a slow flow structure is arranged inside the outer tank body and the inner tank body, and the slow flow structure is used to slow down the flow rate of the gas-liquid mixture so that the liquid The tiny bubbles mixed in the liquid burst before the liquid is discharged from the outer tank body and the inner tank body. The outer tank drain pipe and the inner tank drain pipe are fixed to the bottom of the outer tank body and the inner tank body respectively. The outer tank drain pipe and the inner tank drain pipe are used to discharge the liquid accumulated in the slow flow structure. The outer tank body and the inner tank body are fixedly installed with baffles inside. The baffles are respectively arranged above the slow flow structure to filter the small water droplets floating in the gas-liquid mixture and make the water droplets fall into the inside of the slow flow structure when sliding down. The inner tank body is configured as a double-layer hollow tank body, and a cooling water pipe is installed in its hollow interlayer. The cooling water pipe is used to cool the interior of the gas-liquid separator so that the water vapor in the gas-liquid mixture is condensed into small water droplets.

[0010] Preferably, the outer tank gas-liquid input pipe comprises an outer tank input pipe connecting portion, an outer tank input pipe inclined portion and an outer tank input pipe outlet which are fixedly connected in sequence, the outer tank input pipe connecting portion passes through the side wall of the outer tank body and extends to the interior of the outer tank body, and the outer tank input pipe branch outlets are evenly distributed on the upward side of the outer tank input pipe inclined portion, and the inner tank gas-liquid input pipe comprises an inner tank input pipe connecting portion, an inner tank input pipe inclined portion and an inner tank input pipe outlet which are fixedly connected in sequence, the inner tank input pipe connecting portion passes through the side walls of the outer tank body and the inner tank body and extends to the interior of the inner tank body, and the inner tank input pipe branch outlets are evenly distributed on the upward side of the inner tank input pipe inclined portion.

[0011] Preferably, an outer tank input pipe gas-liquid block is provided inside the inclined portion of the outer tank input pipe, and an inner tank input pipe gas-liquid block is provided inside the inclined portion of the inner tank input pipe. The outer tank input pipe gas-liquid block is fixedly installed on a side of the outer tank input pipe inclined portion away from the outer tank input pipe branch outlet, and the inner tank input pipe gas-liquid block is fixedly installed on a side of the inner tank input pipe inclined portion away from the inner tank input pipe branch outlet.

[0012] Preferably, the slow flow structure located inside the outer tank body includes an outer tank water storage baffle and an outer tank slow flow baffle, and the slow flow structure located inside the inner tank body includes an inner tank water storage baffle and an inner tank slow flow baffle, the outer tank water storage baffle and the outer tank slow flow baffle are respectively fixedly mounted on both sides of the bottom of the outer tank body, the height of the outer tank water storage baffle is not less than the height of the outer tank slow flow baffle, the height of the outer tank input pipe outlet is not greater than the height of the outer tank water storage baffle, the outer tank water storage baffle is arranged on one side of the outer tank body close to the outer tank gas-liquid input pipe, the inner tank water storage baffle and the inner tank slow flow baffle are respectively fixedly mounted on both sides of the bottom of the inner tank body, the height of the inner tank water storage baffle is not less than the height of the inner tank slow flow baffle, the height of the inner tank input pipe outlet is not greater than the height of the inner tank water storage baffle, and the inner tank water storage baffle is arranged on one side of the inner tank body close to the inner tank gas-liquid input pipe.

[0013] Preferably, the inner wall of the outer tank body and the outer wall of the inner tank body are fixedly connected by a layered support plate, the layered support plate divides the interior of the outer tank body into two upper and lower outer tank chambers, an outer tank connecting port is provided between the upper and lower outer tank chambers, the outer tank connecting port is provided at an end away from the gas-liquid inlet pipe of the outer tank, the interior of the inner tank body is divided into two upper and lower inner tank chambers by an isolation layered plate, an inner tank connecting port is provided between the upper and lower inner tank chambers, the inner tank connecting port is provided at an end away from the gas-liquid inlet pipe of the inner tank, and baffles are fixedly installed at both the upper and lower ends of the layered support plate and the isolation layered plate.

[0014] Preferably, the outer tank connecting port extends to the side of the outer tank slow flow baffle away from the inner tank gas-liquid input pipe, and the inner tank connecting port extends to the side of the inner tank slow flow baffle away from the outer tank gas-liquid input pipe.

[0015] Preferably, the outer tank drain pipe is arranged between the outer tank water storage baffle and the outer tank slow flow baffle, and the inner tank drain pipe is arranged between the inner tank water storage baffle and the inner tank slow flow baffle. The inner tank drain pipe passes through the bottom wall of the outer tank body and extends to the bottom of the outer tank body. The lower ends of the outer tank drain pipe and the inner tank drain pipe are fixedly installed with drain valves.

[0016] Preferably, the two ends of the cooling water pipe are respectively fixedly connected with a cooling water input pipe and a cooling water output pipe, and the cooling water input pipe and the cooling water output pipe both penetrate the side walls of the inner tank body and the outer tank body and extend to the outside of the outer tank body. The tank wall and the baffle of the inner tank body are made of heat-conducting metal materials, and are filled with a heat-conducting filling layer. The baffles are welded and fixed to the tank wall of the inner tank body.

[0017] The present invention also discloses a gas-liquid separation method, the specific steps of which are:

[0018] Connect the outer tank gas-liquid input pipe and the inner tank gas-liquid input pipe to the hydrogen side gas outlet pipe and the oxygen side gas outlet pipe of the alkaline water electrolyzer respectively;

[0019] Cooling liquid is circulated into the cooling water pipe to cool the inner and outer tank walls of the inner tank body;

[0020] The two gas-liquid mixtures produced by electrolytic hydrogen production enter the outer tank body and the inner tank body from the outer tank gas-liquid input pipe and the inner tank gas-liquid input pipe respectively. A part of the water falls to the bottom of the outer tank body and the inner tank body and directly becomes water flow. The slow-flow structure decelerates the mixed bubbles in the water flow so that the gas in the water flow moves toward the direction of the outer tank exhaust pipe and the inner tank exhaust pipe, and the water is discharged from the outer tank drain pipe and the inner tank drain pipe. The other part of the water vapor mixed in the gas moves with the gas toward the direction of the outer tank exhaust pipe and the inner tank exhaust pipe.

[0021] When the gas passes through the baffle, the mixed water vapor condenses on the baffle, so that the gas and water are completely separated, and the two gases are discharged from the outer tank exhaust pipe and the inner tank exhaust pipe respectively;

[0022] The condensed water droplets slide along the baffles and the tank wall to the bottom of the tank, and are discharged from the outer tank drain pipe and the inner tank drain pipe after passing through the slow flow structure.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a gas-liquid separator, a hydrogen production device based on the separator, and a separation method, which have the following beneficial effects:

[0025] 1. The gas-liquid separator, by arranging an inner tank body inside the outer tank body, can simultaneously introduce the gas-liquid mixture of two gases produced by the electrolyzer for gas-liquid separation. When the hydrogen production device is used to electrolyze water to produce hydrogen, there is no need to use two gas-liquid separators at the same time to dehydrate hydrogen and oxygen respectively, so that the hydrogen production device occupies a smaller area and is more convenient to install.

[0026] 2. The gas-liquid separator is provided with a slow-flow structure. After the liquid falls into the tank through the gas-liquid input pipe, a certain depth of liquid needs to be accumulated before it can flow through the top of the water storage baffle toward the slow-flow baffle, and water needs to be fully accumulated between the water storage baffle and the slow-flow baffle before it can flow through the slow-flow baffle toward the discharge pipe, which is convenient for decelerating the liquid, so that the tiny bubbles mixed in the liquid gradually burst and release gas when the liquid passes between the water storage baffle and the slow-flow baffle.

[0027] 3. The gas-liquid separator is provided with a water storage baffle and a slow-flow baffle. When the liquid enters between the water storage baffle and the slow-flow baffle and the flow rate is reduced, the impurity particles in the water gradually settle, so that the alkaline components in the liquid discharged from the discharge pipe are reduced, the probability of blockage of the discharge pipe is reduced, and the reduction of the discharge rate is avoided. By providing a sewage pipe and a sewage valve, it is convenient to discharge the water between the water storage baffle and the slow-flow baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a cross-sectional view of a three-dimensional structure of a gas-liquid separator of the present invention;

[0029] FIG2 is a second sectional view of the three-dimensional structure of the gas-liquid separator of the present invention;

[0030] FIG3 is a third sectional view of the three-dimensional structure of the gas-liquid separator of the present invention;

[0031] FIG4 is an enlarged schematic diagram of the local structure at A in FIG3 of the present invention;

[0032] FIG5 is an enlarged schematic diagram of the local structure at B in FIG3 of the present invention;

[0033] FIG6 is a fourth sectional view of the three-dimensional structure of the gas-liquid separator of the present invention;

[0034] FIG7 is a schematic diagram of the exploded structure of the gas-liquid separator of the present invention;

[0035] FIG8 is a fifth sectional view of the three-dimensional structure of the gas-liquid separator of the present invention;

[0036] FIG9 is a sixth sectional view of the three-dimensional structure of the gas-liquid separator of the present invention;

[0037] FIG10 is a schematic diagram of a three-dimensional structure of a gas-liquid separator according to the present invention;

[0038] FIG. 11 is a second schematic diagram of the three-dimensional structure of the gas-liquid separator of the present invention.

[0039] In the figure:

[0040] 1. External tank body; 11. External tank gas and liquid input pipe; 111. External tank input pipe connection portion; 112. External tank input pipe inclined portion; 113. External tank input pipe outlet; 114. External tank input pipe branch outlet; 115. External tank input pipe gas and liquid stopper; 12. External tank exhaust pipe; 13. External tank liquid discharge pipe; 14. External tank sewage pipe;

[0041] 2. Inner tank body; 21. Inner tank gas-liquid input pipe; 211. Inner tank input pipe connection portion; 212. Inner tank input pipe inclined portion; 213. Inner tank input pipe outlet; 214. Inner tank input pipe branch outlet; 215. Inner tank input pipe gas-liquid stopper; 22. Inner tank exhaust pipe; 23. Inner tank liquid discharge pipe; 24. Inner tank sewage pipe;

[0042] 3. Slow flow structure; 31. Water storage baffle of outer tank; 32. Slow flow baffle of outer tank; 33. Water storage baffle of inner tank; 34. Slow flow baffle of inner tank;

[0043] 4. Baffle;

[0044] 5. Cooling water pipe; 51. Cooling water input pipe; 52. Cooling water output pipe; 53. Thermal conductive filling layer;

[0045] 6. Layered support plate; 61. External tank connecting port;

[0046] 7. Isolation layer plate; 71. Inner tank connecting port;

[0047] 8. Drain valve. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Embodiment 1

[0050] Please refer to Figures 1 and 2. The present invention provides a gas-liquid separator, including an outer tank body 1, an inner tank body 2 is arranged inside the outer tank body 1, an outer tank gas-liquid input pipe 11 is fixedly installed at one end of the outer tank body 1, and an inner tank gas-liquid input pipe 21 is fixedly installed at one end of the inner tank body 2. An outer tank exhaust pipe 12 and an outer tank liquid discharge pipe 13 connected to the inner part of the outer tank body 1 are fixedly installed at the upper and lower ends of the outer tank body 1, respectively. An inner tank exhaust pipe 22 and an inner tank liquid discharge pipe 23 connected to the inner part of the inner tank body 2 are fixedly installed at the upper and lower ends of the inner tank body 2, respectively. The inner tank gas-liquid input pipe 21, the inner tank exhaust pipe 22 and the inner tank liquid discharge pipe 23 all penetrate the outer tank body 1 and extend to the outside of the outer tank body 1. The outer tank body 1 and the inner tank body 2 are both provided with a slow flow structure 3, and the slow flow structure 3 is used to slow down the mixing of gas and liquid. The flow rate of the liquid causes the tiny bubbles mixed in the liquid to burst before the liquid is discharged from the outer tank body 1 and the inner tank body 2. An outer tank drain pipe 14 and an inner tank drain pipe 24 are fixed to the bottom of the outer tank body 1 and the inner tank body 2 respectively. The outer tank drain pipe 14 and the inner tank drain pipe 24 are both used to discharge the liquid accumulated in the slow flow structure 3. The outer tank body 1 and the inner tank body 2 are both fixedly installed with baffles 4. The baffles 4 are respectively arranged above the slow flow structure 3 to filter the small water droplets floating in the gas-liquid mixture and make the water droplets fall into the inside of the slow flow structure 3 when sliding down. The inner tank body 2 is configured as a double-layer hollow tank body, and a cooling water pipe 5 is installed in its hollow interlayer. The cooling water pipe 5 is for internal cooling of the gas-liquid separator to condense the water vapor in the gas-liquid mixture into small water droplets.

[0051] As can be seen from the above, when the gas-liquid separator is used, the outer tank gas-liquid input pipe 11 and the inner tank gas-liquid input pipe 21 are connected to the hydrogen side outlet pipe and the oxygen side outlet pipe of the alkaline water electrolyzer respectively, and the cooling liquid is circulated into the cooling water pipe 5 so that the cooling liquid cools the inner and outer tank walls of the inner tank body 2. When the two gas-liquid mixtures produced by electrolytic hydrogen production enter the outer tank body 1 and the inner tank body 2 respectively from the outer tank gas-liquid input pipe 11 and the inner tank gas-liquid input pipe 21, a part of the water falls to the bottom of the outer tank body 1 and the inner tank body 2 and directly becomes water flow, which is decelerated by the slow flow structure 3 so that the mixed bubbles in the water flow are broken, thereby The gas in the water flow moves toward the direction of the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22, while the moisture is discharged from the outer tank drain pipe 13 and the inner tank drain pipe 23, and the other part of the water vapor mixed in the gas moves with the gas toward the direction of the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22. When the gas passes through the baffle 4, the mixed water vapor condenses on the baffle 4, so that the gas and the moisture are separated, and the two gases are discharged from the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22 respectively, and the condensed water droplets slide along the baffle 4 and the tank wall to the bottom of the tank, and are discharged from the outer tank drain pipe 13 and the inner tank drain pipe 23 after passing through the slow flow structure 3.

[0052] By arranging the inner tank body 2 inside the outer tank body 1, the gas-liquid mixture of the two gases produced by the electrolyzer can be introduced at the same time for gas-liquid separation. When the hydrogen production device is used to produce hydrogen by alkaline water electrolysis, there is no need to use two gas-liquid separators at the same time to dehydrate the hydrogen and oxygen respectively, so that the hydrogen production device occupies a smaller area and is more convenient to install; at the same time, through the arrangement of the cooling water pipe 5, the low temperature can be conducted to the baffles 4 on the inner and outer sides of the inner tank body 2 through the tank wall of the inner tank body 2, so that water vapor can be more easily condensed into small water droplets when passing through the baffle 4; in addition, the baffle 4 of the present application adopts the baffle with a serpentine bending structure in the prior art. In actual application, the number of bending times and the edge shape of the baffle are changed to adapt to the needs of this embodiment.

[0053] Embodiment 2

[0054] As shown in Figures 3, 4 and 5, the difference between this embodiment and the above embodiment is that the outer tank gas-liquid input pipe 11 includes an outer tank input pipe connecting portion 111, an outer tank input pipe inclined portion 112 and an outer tank input pipe outlet 113 which are fixedly connected in sequence, the outer tank input pipe connecting portion 111 passes through the side wall of the outer tank body 1 and extends to the interior of the outer tank body 1, and the outer tank input pipe branch outlets 114 are evenly distributed on the upward side of the outer tank input pipe inclined portion 112, and the inner tank gas-liquid input pipe 21 includes an inner tank input pipe connecting portion 211, an inner tank input pipe inclined portion 212 and an inner tank input pipe outlet 213 which are fixedly connected in sequence, the inner tank input pipe connecting portion 211 passes through the side walls of the outer tank body 1 and the inner tank body 2 and extends to the interior of the inner tank body 2, and the inner tank input pipe branch outlets 214 are evenly distributed on the upward side of the inner tank input pipe inclined portion 212.

[0055] As can be seen from the above, by setting the outer tank gas-liquid input pipe 11 including the outer tank input pipe connecting part 111, the outer tank input pipe inclined part 112 and the outer tank input pipe outlet 113 which are fixedly connected in sequence, and setting the outer tank input pipe branch outlet 114 on the outer tank input pipe inclined part 112, the gas-liquid mixture entering the outer tank body 1 from the outer tank input pipe connecting part 111 is split at the stage of the outer tank input pipe inclined part 112, the gas in the gas-liquid mixture that is accelerated downward moves upward and is discharged from the outer tank input pipe branch outlet 114, and the liquid flows downward and is discharged from the outer tank input pipe outlet 113. Similarly, in the inner tank body 2, the gas in the gas-liquid mixture moves upward and is discharged from the inner tank input pipe branch outlet 214, and the liquid flows downward and is discharged from the inner tank input pipe outlet 213.

[0056] An outer tank input pipe gas-liquid block 115 is arranged inside the inclined portion 112 of the outer tank input pipe, and an inner tank input pipe gas-liquid block 215 is arranged inside the inclined portion 212 of the inner tank input pipe. The outer tank input pipe gas-liquid block 115 is fixedly installed inside the inclined portion 112 of the outer tank input pipe on a side away from the outer tank input pipe branch outlet 114, and the inner tank input pipe gas-liquid block 215 is fixedly installed inside the inclined portion 212 of the inner tank input pipe on a side away from the inner tank input pipe branch outlet 214.

[0057] As can be seen from the above, by adding the outer tank input pipe gas-liquid stopper 115 inside the outer tank input pipe inclined portion 112, the gas-liquid mixture will collide with the outer tank input pipe gas-liquid stopper 115 in the outer tank input pipe inclined portion 112, thereby slowing down the flow rate of the gas-liquid mixture. After the flow rate of the gas-liquid mixture is slowed down, the relative flow rate difference between the gas and the liquid increases. Specifically, the gas and the liquid have different densities. When they are mixed together and flow, if they encounter an obstruction, the gas will bend away, while the liquid will continue to move forward due to inertia. Therefore, more gas can be separated from the liquid in the outer tank input pipe inclined portion 112 and discharged from the outer tank input pipe branch outlet 114, thereby improving the effect of gas discharge from the outer tank input pipe branch outlet 114. Similarly, the inner tank input pipe gas-liquid stopper 215 can improve the effect of gas discharge from the inner tank input pipe branch outlet 214.

[0058] The slow flow structure 3 located inside the outer tank body 1 includes an outer tank water storage baffle 31 and an outer tank slow flow baffle 32, and the slow flow structure 3 located inside the inner tank body 2 includes an inner tank water storage baffle 33 and an inner tank slow flow baffle 34. The outer tank water storage baffle 31 and the outer tank slow flow baffle 32 are respectively fixedly installed on both sides of the bottom of the outer tank body 1. The height of the outer tank water storage baffle 31 is not less than the height of the outer tank slow flow baffle 32, and the height of the outer tank input pipe outlet 113 is not greater than the height of the outer tank water storage baffle 31. The outer tank water storage baffle 31 is arranged on one side of the outer tank body 1 close to the outer tank gas-liquid input pipe 11, the inner tank water storage baffle 33 and the inner tank slow flow baffle 34 are respectively fixedly installed on both sides of the bottom of the inner tank body 2, the height of the inner tank water storage baffle 33 is not less than the height of the inner tank slow flow baffle 34, the height of the inner tank input pipe outlet 213 is not greater than the height of the inner tank water storage baffle 33, and the inner tank water storage baffle 33 is arranged on one side of the inner tank body 2 close to the inner tank gas-liquid input pipe 21.

[0059] As can be seen from the above, since the height of the outer tank input pipe outlet 113 is not greater than the height of the outer tank water storage baffle 31, the liquid discharged from the outer tank input pipe outlet 113 will hit the side of the outer tank water storage baffle 31 and store water. In this process, the liquid discharged from the outer tank input pipe outlet 113 flows below the water surface in a submerged flow manner, and the accumulated water body plays a role in hindering and decelerating, making it easier for the gas mixed in the liquid to separate from the liquid. When the height of the water body exceeds the outer tank water storage baffle 31, it flows to the other side of the outer tank water storage baffle 31. Under the action of the top surface width of the outer tank water storage baffle 31 and the surface tension of the water body, the liquid passes through the outer tank water storage baffle 31. The water body of the tank water storage baffle 31 is subjected to the effect of rectification. Therefore, when the water body flows from the outer tank water storage baffle 31 to the outer tank slow flow baffle 32, the flow direction is consistent and turbulence is not easy to occur, thereby ensuring that the gas on the water surface is not easy to form bubbles when the water body flows, and the mixed bubbles in the water body can also gradually break and disappear in the slow flow. Finally, the water body near the outer tank discharge pipe 13 through the top of the outer tank slow flow baffle 32 is discharged from the outer tank discharge pipe 13. Similarly, the inner tank water storage baffle 33 and the inner tank slow flow baffle 34 arranged in the inner tank body 2 also have the same functions as the outer tank water storage baffle 31 and the outer tank slow flow baffle 32.

[0060] Embodiment 3

[0061] As shown in Figures 6 to 9, the difference between this embodiment and the above-mentioned embodiment lies in that the inner wall of the outer tank body 1 and the outer wall of the inner tank body 2 are fixedly connected by a layered support plate 6, and the layered support plate 6 divides the interior of the outer tank body 1 into two upper and lower outer tank chambers, and an outer tank connecting port 61 is provided between the upper and lower outer tank chambers, and the outer tank connecting port 61 is arranged at an end away from the outer tank gas-liquid inlet pipe 11, and the interior of the inner tank body 2 is divided into two upper and lower inner tank chambers by an isolation layered plate 7, and an inner tank connecting port 71 is provided between the upper and lower inner tank chambers, and the inner tank connecting port 71 is arranged at an end away from the inner tank gas-liquid inlet pipe 21, and baffles 4 are fixedly installed at both the upper and lower ends of the layered support plate 6 and the isolation layered plate 7.

[0062] As can be seen from the above, by providing the layered support plate 6, on the one hand, the inner tank body 2 is supported so that the inner tank body 2 and the outer tank body 1 are fixed. On the other hand, since the gas cannot directly pass through the layered support plate 6, it must bypass the outer tank connecting port 61. Therefore, the layered support plate 6 divides the interior of the outer tank body 1 into two upper and lower outer tank chambers, making the gas flow route longer and being able to separate water and gas more comprehensively. Similarly, the isolation layered plate 7 divides the interior of the inner tank body 2 into two upper and lower inner tank chambers, making the gas flow route longer.

[0063] Furthermore, the outer tank connecting port 61 extends to the side of the outer tank slow flow baffle 32 away from the inner tank gas-liquid input pipe 21 , and the inner tank connecting port 71 extends to the side of the inner tank slow flow baffle 34 away from the outer tank gas-liquid input pipe 11 .

[0064] Since the outer tank connecting port 61 extends to the side of the outer tank slow flow baffle 32 away from the inner tank gas-liquid inlet pipe 21, the liquid falling on the layered support plate 6 flows to the outer tank connecting port 61 and drips downward and can fall between the outer tank water storage baffle 31 and the outer tank slow flow baffle 32. Similarly, when the liquid drips downward from the inner tank connecting port 71, it can fall between the inner tank water storage baffle 33 and the inner tank slow flow baffle 34.

[0065] Furthermore, the outer tank drain pipe 14 is arranged between the outer tank water storage baffle 31 and the outer tank slow flow baffle 32, and the inner tank drain pipe 24 is arranged between the inner tank water storage baffle 33 and the inner tank slow flow baffle 34. The inner tank drain pipe 24 passes through the bottom wall of the outer tank body 1 and extends to the bottom of the outer tank body 1. The lower ends of the outer tank drain pipe 14 and the inner tank drain pipe 24 are fixedly installed with drain valves 8.

[0066] As can be seen from the above, by setting the outer tank drain pipe 14 between the outer tank water storage baffle 31 and the outer tank slow flow baffle 32, the water between the outer tank water storage baffle 31 and the outer tank slow flow baffle 32 can be discharged through the outer tank drain pipe 14. Similarly, the water between the inner tank water storage baffle 33 and the inner tank slow flow baffle 34 can be discharged through the inner tank drain pipe 24. By setting the drain valve 8, the drain of the outer tank drain pipe 14 and the inner tank drain pipe 24 can be controlled.

[0067] Embodiment 4

[0068] As shown in Figure 2, the difference between this embodiment and the above embodiment is that the two ends of the cooling water pipe 5 are respectively fixedly connected with a cooling water input pipe 51 and a cooling water output pipe 52, and the cooling water input pipe 51 and the cooling water output pipe 52 both penetrate the side walls of the inner tank body 2 and the outer tank body 1 and extend to the outside of the outer tank body 1. The tank wall and the baffle 4 of the inner tank body 2 are made of heat-conducting metal materials, and are filled with a heat-conducting filling layer 53. The baffles 4 are welded and fixed to the tank wall of the inner tank body 2.

[0069] As can be seen from the above, by providing a cooling water pipe 5, a cooling water input pipe 51, a cooling water output pipe 52 and a heat-conducting filling layer 53, when the coolant is circulated into the cooling water pipe 5, the low temperature can be transferred to the tank wall and the baffle 4 of the inner tank body 2 through the heat-conducting filling layer 53, making it easier to cool the interior of the gas-liquid separator, so that the moisture in the gas-liquid mixture can condense faster.

[0070] Embodiment 5

[0071] Please refer to Figures 1 to 11. The present invention also discloses a gas-liquid separation method, which specifically comprises the following steps:

[0072] The outer tank gas-liquid input pipe 11 and the inner tank gas-liquid input pipe 21 are respectively connected to the hydrogen side gas outlet pipe and the oxygen side gas outlet pipe of the alkaline water electrolyzer;

[0073] A coolant is circulated into the cooling water pipe 5 to cool the inner and outer tank walls of the inner tank body 2;

[0074] The two gas-liquid mixtures produced by electrolytic hydrogen production enter the outer tank body 1 and the inner tank body 2 from the outer tank gas-liquid input pipe 11 and the inner tank gas-liquid input pipe 21 respectively. A part of the water falls to the bottom of the outer tank body 1 and the inner tank body 2 and directly becomes water flow. The water flow is decelerated by the slow flow structure 3 so that the bubbles mixed in the water flow are broken, so that the gas in the water flow moves toward the direction of the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22, and the water is discharged from the outer tank drain pipe 13 and the inner tank drain pipe 23. The other part of the water vapor mixed in the gas moves with the gas toward the direction of the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22.

[0075] When the gas passes through the baffle plate 4, the mixed water vapor condenses on the baffle plate 4, so that the gas and the water are completely separated, and the two gases are discharged from the outer tank exhaust pipe 12 and the inner tank exhaust pipe 22 respectively;

[0076] The condensed water droplets slide down the baffle plate 4 and the tank wall to the tank bottom, and are discharged from the outer tank drain pipe 13 and the inner tank drain pipe 23 after passing through the slow flow structure 3.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid separator, comprising an outer tank, characterized in that: An inner tank body is arranged inside the outer tank body, an outer tank gas-liquid input pipe is fixedly installed at one end of the outer tank body, an inner tank gas-liquid input pipe is fixedly installed at one end of the inner tank body, an outer tank exhaust pipe communicating with the interior is fixedly installed at the upper end of the outer tank body, an outer tank liquid discharge pipe communicating with the interior is fixedly installed at the lower end of the outer tank body, an inner tank exhaust pipe communicating with the interior is fixedly installed at the upper end of the inner tank body, an inner tank liquid discharge pipe communicating with the interior is fixedly installed at the lower end of the inner tank body, the inner tank gas-liquid input pipe, the inner tank exhaust pipe and the inner tank liquid discharge pipe all penetrate the outer tank body and extend to the outside of the outer tank body, and a slow flow structure is arranged inside the outer tank body and the inner tank body, and the slow flow structure is used to slow down the flow of the gas-liquid mixture The speed is such that the tiny bubbles mixed in the liquid burst before the liquid is discharged from the outer tank body and the inner tank body. An outer tank drain pipe is fixed to the bottom of the outer tank body, and an inner tank drain pipe is fixed to the bottom of the inner tank body. The outer tank drain pipe and the inner tank drain pipe are used to discharge the liquid accumulated in the slow flow structure. Baffles are fixedly installed inside the outer tank body and the inner tank body. The baffles are respectively arranged above the slow flow structure to filter the small water droplets floating in the gas-liquid mixture and make the water droplets fall into the inside of the slow flow structure when sliding down. The inner tank body is arranged as a double-layer hollow tank body, and a cooling water pipe is installed in the hollow interlayer thereof. The cooling water pipe is used to cool the interior of the gas-liquid separator so that the water vapor in the gas-liquid mixture is condensed into small water droplets.

2. A gas-liquid separator according to claim 1, characterized in that: The outer tank gas-liquid input pipe comprises an outer tank input pipe connecting portion, an outer tank input pipe inclined portion and an outer tank input pipe outlet which are fixedly connected in sequence, the outer tank input pipe connecting portion passes through the side wall of the outer tank body and extends to the interior of the outer tank body, and the outer tank input pipe branch outlets are evenly distributed on the upward side of the outer tank input pipe inclined portion, and the inner tank gas-liquid input pipe comprises an inner tank input pipe connecting portion, an inner tank input pipe inclined portion and an inner tank input pipe outlet which are fixedly connected in sequence, the inner tank input pipe connecting portion passes through the side walls of the outer tank body and the inner tank body and extends to the interior of the inner tank body, and the inner tank input pipe branch outlets are evenly distributed on the upward side of the inner tank input pipe inclined portion.

3. A gas-liquid separator according to claim 2, characterized in that: An outer tank input pipe gas-liquid block is arranged inside the inclined portion of the outer tank input pipe, and an inner tank input pipe gas-liquid block is arranged inside the inclined portion of the inner tank input pipe. The outer tank input pipe gas-liquid block is fixedly installed inside the inclined portion of the outer tank input pipe on a side away from the branch outlet of the outer tank input pipe, and the inner tank input pipe gas-liquid block is fixedly installed inside the inclined portion of the inner tank input pipe on a side away from the branch outlet of the inner tank input pipe.

4. A gas-liquid separator according to claim 2, characterized in that: The slow flow structure located inside the outer tank body includes an outer tank water storage baffle and an outer tank slow flow baffle, and the slow flow structure located inside the inner tank body includes an inner tank water storage baffle and an inner tank slow flow baffle, the outer tank water storage baffle and the outer tank slow flow baffle are respectively fixedly installed on both sides of the inner bottom of the outer tank body, the height of the outer tank water storage baffle is not less than the height of the outer tank slow flow baffle, the height of the outer tank input pipe outlet is not greater than the height of the outer tank water storage baffle, the outer tank water storage baffle is arranged on one side of the inner tank body close to the outer tank gas-liquid input pipe, the inner tank water storage baffle and the inner tank slow flow baffle are respectively fixedly installed on both sides of the inner bottom of the inner tank body, the height of the inner tank water storage baffle is not less than the height of the inner tank slow flow baffle, the height of the inner tank input pipe outlet is not greater than the height of the inner tank water storage baffle, and the inner tank water storage baffle is arranged on one side of the inner tank body close to the inner tank gas-liquid input pipe.

5. A gas-liquid separator according to claim 4, characterized in that: The inner wall of the outer tank body and the outer wall of the inner tank body are fixedly connected by a layered support plate, and the layered support plate divides the interior of the outer tank body into two upper and lower outer tank chambers, an outer tank connecting port is provided between the upper and lower outer tank chambers, and the outer tank connecting port is arranged at an end away from the gas-liquid input pipe of the outer tank, the interior of the inner tank body is divided into two upper and lower inner tank chambers by an isolation layered plate, an inner tank connecting port is provided between the upper and lower inner tank chambers, and the inner tank connecting port is arranged at an end away from the gas-liquid input pipe of the inner tank, and baffles are fixedly installed at both the upper and lower ends of the layered support plate and the isolation layered plate.

6. A gas-liquid separator according to claim 5, characterized in that: The outer tank connecting port extends to a side of the outer tank slow flow baffle away from the inner tank gas-liquid input pipe, and the inner tank connecting port extends to a side of the inner tank slow flow baffle away from the outer tank gas-liquid input pipe.

7. A gas-liquid separator according to claim 4, characterized in that: The outer tank drain pipe is arranged between the outer tank water storage baffle and the outer tank slow flow baffle, and the inner tank drain pipe is arranged between the inner tank water storage baffle and the inner tank slow flow baffle. The inner tank drain pipe passes through the bottom wall of the outer tank body and extends to the bottom of the outer tank body. The lower ends of the outer tank drain pipe and the inner tank drain pipe are fixedly installed with drain valves.

8. A gas-liquid separator according to claim 1, characterized in that: One end of the cooling water pipe is fixedly connected to a cooling water input pipe, and the other end of the cooling water pipe is fixedly connected to a cooling water output pipe. Both the cooling water input pipe and the cooling water output pipe penetrate the side walls of the inner tank body and the outer tank body and extend to the outside of the outer tank body. The tank wall and the baffle of the inner tank body are made of heat-conducting metal materials and are filled with a heat-conducting filling layer. The baffles are welded and fixed to the tank wall of the inner tank body.

9. A hydrogen production device, characterized in that: It comprises a gas-liquid separator as described in any one of claims 1-8.

10. A gas-liquid separation method, using a gas-liquid separator as claimed in any one of claims 1 to 8, characterized in that: The specific steps are: Connect the gas-liquid input pipe of the outer tank to the gas outlet pipe on the hydrogen side of the alkaline water electrolyzer, and connect the gas-liquid input pipe of the inner tank to the gas outlet pipe on the oxygen side of the alkaline water electrolyzer; Cooling liquid is circulated into the cooling water pipe to cool the inner and outer tank walls of the inner tank body; The two gas-liquid mixtures produced by electrolytic hydrogen production enter the outer tank body and the inner tank body from the outer tank gas-liquid input pipe and the inner tank gas-liquid input pipe respectively. A part of the water falls to the bottom of the outer tank body and the inner tank body and directly becomes water flow. The slow-flow structure decelerates the mixed bubbles in the water flow so that the gas in the water flow moves toward the direction of the outer tank exhaust pipe and the inner tank exhaust pipe, and the water is discharged from the outer tank drain pipe and the inner tank drain pipe. The other part of the water vapor mixed in the gas moves with the gas toward the direction of the outer tank exhaust pipe and the inner tank exhaust pipe. When the gas passes through the baffle, the mixed water vapor condenses on the baffle, so that the gas and water are completely separated, and the two gases are discharged from the outer tank exhaust pipe and the inner tank exhaust pipe respectively; The condensed water droplets slide along the baffles and the tank wall to the bottom of the tank, and are discharged from the outer tank drain pipe and the inner tank drain pipe after passing through the slow flow structure.

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