Process system for reducing hydrogen and oxygen content of alkali liquor and mixing hydrogen and oxygen in alkaline hydrogen production

Abstract

The invention discloses a process system for reducing the hydrogen and oxygen content of alkali liquor and mixing hydrogen and oxygen in alkaline hydrogen production, and relates to the technical field of hydrogen production processes. The problems that an existing gas-liquid separation system is complex in structure and large in number of pipelines, a separated gas-liquid mixture is prone to returning to alkali liquor, the gas content of the alkali liquor is increased, the mixing probability of two kinds of gas and liquid is increased, and safety accidents are prone to occurring are solved. The device specifically comprises a hydrogen alkali liquor separator, an oxygen alkali liquor separator, a hydrogen alkali liquor washer, an oxygen alkali liquor washer, a hydrogen cooler, an oxygen cooler, a hydrogen gas-liquid separator and an oxygen gas-liquid separator. According to the gas-liquid separation system, while pipelines of the whole gas-liquid separation system are reduced, the problem that hydrogen or oxygen subjected to secondary separation enters oxygen alkali liquor or a hydrogen alkali liquor separator, and consequently the hydrogen and oxygen content in the corresponding separator is increased can be effectively prevented, meanwhile, the hydrogen and oxygen content of alkali liquor at the front end of an alkali liquor pump is indirectly reduced, and the service life of the gas-liquid separation system is prolonged. And the hydrogen-oxygen mixing possibility is further reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production technology, and in particular to a process system for reducing hydrogen and oxygen content in alkaline solution and hydrogen and oxygen mixing in alkaline hydrogen production. Background Art

[0002] Hydrogen production is a sustainable energy solution and is widely regarded as an important development direction for the future energy industry. With the rapid development of electrolyzer equipment, the large-scale and large-scale production of water electrolysis hydrogen production systems has become an inevitable development trend. At present, alkaline water electrolysis hydrogen production technology is the most mature hydrogen production method. Alkaline hydrogen production equipment consists of electrolyzers, gas-liquid separation systems, purification systems, gas-liquid separation systems, auxiliary systems, etc. Its electrolyzer structure mainly includes two electrode plates and a diaphragm between the plates. The electrode chambers composed of electrode plates can be connected in series to increase production capacity. During the electrolysis process, hydrogen is produced on the cathode surface and oxygen is produced on the anode surface. Due to the obstruction of the diaphragm, the gas produced by the internal cathode and anode will not mix. The gas and liquid are separated again through gas-liquid separation, washing, cooling and secondary separation outside, and the excess liquid returns to the separator.

[0003] How to safely and quickly separate the gas from the electrode surface and alkali solution is one of the important issues currently faced in improving the electrolysis efficiency and safety of the electrolysis system. The gas-liquid separation system in the traditional hydrogen production system adopts gravity sedimentation, washing, cooling and then separation. The separation effect of fine bubbles in the electrolyte is very unsatisfactory, which can easily cause gas backmixing and increase the gas content of the alkali solution. Improper operation and control can easily lead to safety accidents.

[0004] From the perspective of the current traditional hydrogen production process, the gas-liquid separation system in the existing alkaline hydrogen production system has the following main disadvantages: the gas-liquid separation system has a complex structure and more pipelines; the cooler in the separation system and the gas-liquid mixture after separation are returned to the alkaline solution, which increases the gas content of the alkaline solution. At the same time, improper control can easily cause the gas after secondary separation to return to the alkaline solution, further increasing the gas content of the alkaline solution, increasing the probability of mixing the two gases and liquids, and easily causing safety accidents;

[0005] Therefore, developing a set of separation system processes and control methods that are fast and safe is of great significance for improving the electrolysis efficiency and safety of alkaline water electrolysis systems. Based on this, it is necessary to optimize the gas-liquid separation system process route and gas-liquid separation control method in the hydrogen production system to ensure safe and stable operation of the system. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a process system for reducing the hydrogen and oxygen content of alkali solution and the hydrogen and oxygen mixing in alkaline hydrogen production.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A process system for reducing the hydrogen and oxygen content of alkali liquid and the mixing of hydrogen and oxygen in alkaline hydrogen production, comprising a hydrogen alkali liquid separator, an oxygen alkali liquid separator, a hydrogen alkali liquid scrubber, an oxygen alkali liquid scrubber, a hydrogen cooler, an oxygen cooler, a hydrogen gas-liquid separator and an oxygen gas-liquid separator, wherein the hydrogen alkali liquid separator, the oxygen alkali liquid separator, the hydrogen alkali liquid scrubber, the oxygen alkali liquid scrubber, the hydrogen cooler, the oxygen cooler, the hydrogen gas-liquid separator and the oxygen gas-liquid separator are interconnected through pipelines, and the outer walls of the hydrogen alkali liquid separator and the oxygen alkali liquid separator are connected with a hydrogen-oxygen alkali liquid separator pressure balance pipe and an oxygen alkali liquid separator. and a hydrogen alkali liquid mixed reflux pipe, the oxygen alkali liquid and hydrogen alkali liquid mixed reflux pipe is connected to the front end cooler of the alkali liquid pump, the hydrogen gas-liquid separator and the hydrogen cooler are respectively provided with a hydrogen side water vapor reflux pipe and a hydrogen and water vapor reflux pipe on the outer walls, the oxygen cooler and the oxygen gas-liquid separator are respectively provided with an oxygen and water vapor reflux pipe and an oxygen side water vapor reflux pipe on the outer walls, the hydrogen side water vapor reflux pipe and the hydrogen and water vapor reflux pipe are connected to the first auxiliary storage tank through a pipeline, the oxygen and water vapor reflux pipe and the oxygen side water vapor reflux pipe are connected to the second auxiliary storage tank through a pipeline, and the first auxiliary storage tank and the second auxiliary storage tank have the same structure.

[0009] Preferably: the inner walls of the first auxiliary storage tank and the second auxiliary storage tank are respectively provided with liquid level transmitters, the upper and lower outer walls of the first auxiliary storage tank and the second auxiliary storage tank are respectively connected with exhaust electric ball valves and drain electric ball valves through pipelines, and the liquid level transmitter, drain electric ball valve and exhaust electric ball valve are respectively electrically connected to the system main control panel.

[0010] Further: a feed pipe is fixed to the outer wall of the first auxiliary storage tank, a liquid guide cover is inserted into the outer wall of the bottom of the feed pipe, a plurality of discharge pipes are inserted into the outer wall of the liquid guide cover, and a plurality of exhaust holes are opened on the outer wall of the discharge pipe.

[0011] Further preferably, an arc-shaped buffer pad is fixed to the inner wall of the bottom of the liquid-conducting cover.

[0012] As a preferred embodiment of the present invention: a plurality of partitions are fixed to the inner wall of the first auxiliary storage tank, a diverter block is fixed to the outer wall of the partition, and a plurality of supporting legs are fixed to the outer wall of the first auxiliary storage tank.

[0013] As a further preferred embodiment of the present invention: a liquid guide tube is inserted into the outer wall of the liquid discharge electric ball valve, a liquid collecting box is fixed to the outer wall of the liquid guide tube, and a liquid discharge tube is inserted into the outer wall of one side of the liquid collecting box.

[0014] As a further solution of the present invention: an air guide hood is provided on the top outer wall of the liquid collecting box, a connecting pipe is plugged into the outer wall of the air guide hood, an air guide pipe is plugged into the outer wall of the exhaust electric ball valve, an air collecting box is fixed on the outer wall of the air guide pipe, an exhaust pipe is plugged into the outer wall of one side of the air collecting box, and the connecting pipe is plugged into the bottom inner wall of the air collecting box.

[0015] On the basis of the above-mentioned solution: a sealing frame is inserted into the inner wall of the top of the gas collecting box, and a water-absorbing cotton net is fixed on the inner wall of the sealing frame.

[0016] Preferably, based on the above scheme: a group of brackets are fixed to the inner wall of the liquid collecting box, a rotating shaft is rotatably connected to the inner wall of the bracket, and a plurality of paddles are fixed to the outer wall of the rotating shaft.

[0017] The beneficial effects of the present invention are:

[0018] 1. The first auxiliary storage tank and the second auxiliary storage tank are used to separate and recover the excess hydrogen, oxygen and water vapor discharged from the hydrogen gas-liquid separator, the oxygen gas-liquid separator, the hydrogen cooler and the oxygen cooler, so that the pipelines of the entire gas-liquid separation system are reduced and the entire gas-liquid separation control becomes simple. At the same time, when the coolers and separators on the oxygen side and the hydrogen side of the gas-liquid separation system are abnormal, or when the pressure on one side increases, it can effectively prevent the hydrogen or oxygen after the secondary separation from entering the oxygen-alkali liquid or hydrogen-alkali liquid separator, resulting in an increase in the hydrogen and oxygen content in the corresponding separator. At the same time, it indirectly reduces the hydrogen and oxygen content of the alkali liquid at the front end of the alkali liquid pump, further reducing the possibility of hydrogen and oxygen mixing.

[0019] 2. Through the above process optimization, when the entire alkaline hydrogen production system is in operation, the interference of water vapor and hydrogen and oxygen discharged from the cooler and secondary separation on the oxygen-alkali liquid and hydrogen-alkali liquid separators of the gas-liquid separation system is reduced. Therefore, the control of the oxygen-alkali liquid and hydrogen-alkali liquid separators of the gas-liquid separation system is simpler and more accurate, and the control system also becomes simpler.

[0020] 3. When the gas and liquid are transported to the inside of the liquid-conducting hood through the feed pipe, the arc-shaped buffer pad located on the inner wall of the bottom of the liquid-conducting hood can buffer the falling liquid, so that the liquid entering the liquid-conducting hood can stably flow into the first auxiliary storage tank through the multiple discharge pipes connected to the outer wall of the liquid-conducting hood. At the same time, when the gas and liquid pass through the discharge pipe, the hydrogen or oxygen mixed in the liquid will quickly float to the surface and enter the first auxiliary storage tank through the exhaust hole on the outer wall of the discharge pipe, thereby improving the separation efficiency of the gas and liquid inside the first auxiliary storage tank.

[0021] 4. The liquid flowing into the first auxiliary storage tank through the discharge pipe will be blocked by the partition. As the amount of liquid increases, the liquid will overflow the partition and flow into the other side. At this time, the hydrogen or oxygen in the liquid will quickly disperse when overflowing the partition. While improving the hydrogen and oxygen separation efficiency, the liquid flow inside the first auxiliary storage tank is relatively smooth, thereby improving the overall stability of the device during operation.

[0022] 5. The liquid discharged into the liquid guide pipe through the discharge electric ball valve will enter the interior of the liquid collecting box. When entering the liquid collecting box, the liquid will impact the paddles on the outer wall of the rotating shaft, thereby driving the rotating shaft and the paddles to rotate as a whole through the water flow, stirring the liquid flowing through the interior of the liquid collecting box, so that the residual hydrogen and oxygen in the liquid entering the interior of the liquid collecting box will float up quickly, and flow into the connecting pipe through the air guide cover, and then flow into the gas collecting box through the connecting pipe, and be transported to the corresponding storage tank or discharged into the atmosphere through the exhaust pipe on one side of the gas collecting box, thereby improving the overall separation and recovery effect of the device for hydrogen and oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of a process system for reducing the hydrogen and oxygen content of alkali liquid and the mixing of hydrogen and oxygen in alkaline hydrogen production proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a system for recovering and separating residual liquid and gas after hydrogen production in a process system for reducing hydrogen and oxygen content in alkaline solution and hydrogen and oxygen mixing in alkaline hydrogen production proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a first auxiliary storage tank in a process system for reducing the hydrogen and oxygen content of alkali liquid and the mixture of hydrogen and oxygen in alkaline hydrogen production proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of a first auxiliary storage tank of a process system for reducing the hydrogen and oxygen content of alkali liquid and the hydrogen and oxygen mixture in alkaline hydrogen production proposed by the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a liquid guide cover of a process system for reducing the hydrogen and oxygen content of alkali liquid and the mixing of hydrogen and oxygen in alkaline hydrogen production proposed by the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of a liquid collecting box of a process system for reducing the hydrogen and oxygen content of alkali liquid and the mixing of hydrogen and oxygen in alkaline hydrogen production proposed by the present invention;

[0029] Figure 7 The present invention provides a schematic diagram of the structure of a gas collecting box for a process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production.

[0030] In the figure: 1 hydrogen gas-liquid separator, 2 hydrogen cooler, 3 hydrogen alkali liquid scrubber, 4 hydrogen alkali liquid separator, 5 hydrogen and water vapor reflux pipeline, 6 hydrogen side water vapor reflux pipeline, 7 oxygen alkali liquid separator, 8 oxygen alkali liquid scrubber, 9 oxygen cooler, 10 oxygen gas-liquid separator, 11 oxygen and water vapor reflux pipe, 12 oxygen side water vapor reflux pipe, 13 oxygen alkali liquid and hydrogen alkali liquid mixed reflux pipe, 14 hydrogen oxygen alkali liquid separator pressure balance pipe, 15 first auxiliary storage tank, 16 first two auxiliary storage tanks, 17 liquid level transmitter, 18 liquid discharge electric ball valve, 19 exhaust electric ball valve, 20 air guide pipe, 21 air collecting box, 22 exhaust pipe, 23 connecting pipe, 24 air guide cover, 25 liquid discharge pipe, 26 liquid collecting box, 27 liquid guide pipe, 28 supporting legs, 29 feed pipe, 30 liquid guide cover, 31 discharge pipe, 32 partition, 33 diverter block, 34 sealing frame, 35 arc buffer pad, 36 exhaust hole, 37 bracket, 38 paddle, 39 rotating shaft, 40 absorbent cotton net. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Embodiment 1:

[0034] A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production, such as Figure 1-2As shown, it includes a hydrogen alkali liquid separator 4, an oxygen alkali liquid separator 7, a hydrogen alkali liquid scrubber 3, an oxygen alkali liquid scrubber 8, a hydrogen cooler 2, an oxygen cooler 9, a hydrogen gas-liquid separator 1 and an oxygen gas-liquid separator 10, wherein the hydrogen alkali liquid separator 4, the oxygen alkali liquid separator 7, the hydrogen alkali liquid scrubber 3, the oxygen alkali liquid scrubber 8, the hydrogen cooler 2, the oxygen cooler 9, the hydrogen gas-liquid separator 1 and the oxygen gas-liquid separator 10 are interconnected through pipelines, and the outer walls of the hydrogen alkali liquid separator 4 and the oxygen alkali liquid separator 7 are connected with a hydrogen-oxygen alkali liquid separator pressure balance pipe 14 and an oxygen alkali liquid and hydrogen alkali liquid mixed reflux pipe 13, and the oxygen alkali liquid A hydrogen and alkali liquid mixed reflux pipe 13 is connected to the front end cooler of the alkali liquid pump, a hydrogen side water vapor reflux pipe 6 and a hydrogen and water vapor reflux pipe 5 are respectively arranged on the outer walls of the hydrogen gas-liquid separator 1 and the hydrogen cooler 2, an oxygen and water vapor reflux pipe 11 and an oxygen side water vapor reflux pipe 12 are respectively arranged on the outer walls of the oxygen cooler 9 and the oxygen gas-liquid separator 10, the hydrogen side water vapor reflux pipe 6 and the hydrogen and water vapor reflux pipe 5 are connected to the first auxiliary storage tank 15 through a pipeline, the oxygen and water vapor reflux pipe 11 and the oxygen side water vapor reflux pipe 12 are connected to the second auxiliary storage tank 16 through a pipeline, and the first auxiliary storage tank 15 and the second auxiliary storage tank 16 have the same structure;

[0035] First, the hydrogen and alkali liquid to be separated are transported by pipeline to the hydrogen alkali liquid separator 4 for gas-liquid separation, and then enter the hydrogen alkali liquid scrubber 3 for washing, and then enter the hydrogen cooler 2 for cooling. After cooling, they enter the hydrogen gas-liquid separator 1 for secondary separation, so as to separate the hydrogen. The separated hydrogen is transported to the corresponding hydrogen storage tank or hydrogen transportation pipeline through the hydrogen gas-liquid separator 1;

[0036] At the same time, the excess liquid generated by cooling flows into the first auxiliary storage tank 15 through the hydrogen and water vapor reflux pipeline 5, and at the same time, the liquid separated by the hydrogen gas-liquid separator 1 also flows into the first auxiliary storage tank 15 through the hydrogen side water vapor reflux pipeline 6;

[0037] The oxygen and alkali liquid to be separated are transported by pipeline to the oxygen alkali liquid separator 7 for gas-liquid separation, and then enter the oxygen alkali liquid scrubber 8 for washing, and then enter the oxygen cooler 9 for cooling. After cooling, they enter the oxygen gas-liquid separator 10 for secondary separation, so as to separate the oxygen. The separated oxygen is transported to the corresponding oxygen storage tank or hydrogen transmission pipeline through the oxygen gas-liquid separator 10, or directly discharged into the atmosphere;

[0038] At the same time, the excess liquid generated by cooling flows into the second auxiliary storage tank 16 through the oxygen and water vapor reflux pipe 11 , and the liquid separated by the oxygen gas-liquid separator 10 also flows into the second auxiliary storage tank 16 through the oxygen side water vapor reflux pipe 12 .

[0039] like Figure 2 As shown, the inner walls of the first auxiliary storage tank 15 and the second auxiliary storage tank 16 are respectively provided with a liquid level transmitter 17, and the upper and lower outer walls of the first auxiliary storage tank 15 and the second auxiliary storage tank 16 are respectively connected with an exhaust electric ball valve 19 and a drain electric ball valve 18 through pipelines, and the liquid level transmitter 17, the drain electric ball valve 18 and the exhaust electric ball valve 19 are respectively electrically connected to the system main control panel (not shown in the figure);

[0040] The hydrogen, oxygen and water vapor discharged from the hydrogen gas-liquid separator 1, the oxygen gas-liquid separator 10, the hydrogen cooler 2 and the oxygen cooler 9 directly enter the first auxiliary storage tank 15 and the second auxiliary storage tank 16 through the pipeline. When the liquid level transmitter 17 arranged inside the first auxiliary storage tank 15 and the second auxiliary storage tank 16 detects that the liquid level inside the first auxiliary storage tank 15 and the second auxiliary storage tank 16 drops to a certain position, it indicates that the volume of hydrogen and oxygen inside the first auxiliary storage tank 15 and the second auxiliary storage tank 16 is relatively large at this time. Then the main control panel will control the exhaust electric ball valve 19 located at the top of the first auxiliary storage tank 15 and the second auxiliary storage tank 16 to open, and the first auxiliary storage tank 15 and the second auxiliary storage tank 16 will be discharged. The excess hydrogen and oxygen inside the auxiliary storage tank 15 and the second auxiliary storage tank 16 allow the first auxiliary storage tank 15 and the second auxiliary storage tank 16 to reach a gas-liquid equilibrium state again. When the liquid level in the first auxiliary storage tank 15 and the second auxiliary storage tank 16 rises to a certain position, the main control panel will control the drain electric ball valve 18 located at the bottom of the first auxiliary storage tank 15 and the second auxiliary storage tank 16 to open, discharge the excess liquid inside the first auxiliary storage tank 15 and the second auxiliary storage tank 16, so that the first auxiliary storage tank 15 and the second auxiliary storage tank 16 can always maintain a gas-liquid equilibrium state, and periodically discharge the separated oxygen, hydrogen and liquid to the outside;

[0041] The first auxiliary storage tank 15 and the second auxiliary storage tank 16 are used to separate and recover the excess hydrogen, oxygen and water vapor discharged from the hydrogen gas-liquid separator 1, the oxygen gas-liquid separator 10, the hydrogen cooler 2 and the oxygen cooler 9, thereby reducing the number of pipelines in the entire gas-liquid separation system and simplifying the entire gas-liquid separation control. At the same time, when an abnormality occurs in the cooler and separator on the oxygen side and the hydrogen side of the gas-liquid separation system, or when the pressure on one side increases, it can effectively prevent the hydrogen or oxygen after the secondary separation from entering the oxygen-alkali liquid or the hydrogen-alkali liquid separator, resulting in an increase in the hydrogen and oxygen content in the corresponding separator. At the same time, it indirectly reduces the hydrogen and oxygen content in the alkali liquid at the front end of the alkali liquid pump, further reducing the possibility of hydrogen and oxygen mixing.

[0042] Through the above process optimization, when the entire alkaline hydrogen production system is in operation, the control of the oxygen-alkali liquid and hydrogen-alkali liquid separators in the gas-liquid separation system is simpler and more accurate, and the control system also becomes simpler because the interference of water vapor and hydrogen and oxygen discharged from the cooler and secondary separation on the oxygen-alkali liquid and hydrogen-alkali liquid separators in the gas-liquid separation system is reduced.

[0043] Embodiment 2:

[0044] A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production, such as Figure 3-7 As shown, a feed pipe 29 is fixed to the outer wall of the first auxiliary storage tank 15, a liquid guide cover 30 is inserted into the outer wall of the bottom of the feed pipe 29, a plurality of discharge pipes 31 are inserted into the outer wall of the liquid guide cover 30, and a plurality of exhaust holes 36 are opened on the outer wall of the discharge pipe 31;

[0045] An arc-shaped buffer pad 35 is fixed to the inner wall at the bottom of the liquid-conducting cover 30; the feed pipe 29 is connected to the pipeline for conveying hydrogen, oxygen, water vapor and liquid into the first auxiliary storage tank 15. When the gas and liquid are conveyed to the inside of the liquid-conducting cover 30 through the feed pipe 29, the arc-shaped buffer pad 35 located on the inner wall at the bottom of the liquid-conducting cover 30 can buffer the falling liquid, so that the liquid entering the liquid-conducting cover 30 can stably flow into the first auxiliary storage tank 15 through the multiple discharge pipes 31 connected to the outer wall of the liquid-conducting cover 30. At the same time, when the gas and liquid pass through the discharge pipe 31, the hydrogen or oxygen mixed in the liquid will quickly float to the surface and enter the first auxiliary storage tank 15 through the exhaust hole 36 on the outer wall of the discharge pipe 31, thereby improving the separation efficiency of the gas and liquid inside the first auxiliary storage tank 15.

[0046] A plurality of partitions 32 are fixed to the inner wall of the first auxiliary storage tank 15, a diverter block 33 is fixed to the outer wall of the partition 32, and a plurality of supporting legs 28 are fixed to the outer wall of the first auxiliary storage tank 15; the liquid flowing into the first auxiliary storage tank 15 through the discharge pipe 31 will be blocked by the partition 32, and as the amount of liquid increases, the liquid will overflow the partition 32 and flow into the other side. At this time, the hydrogen or oxygen in the liquid will quickly dissipate when overflowing the partition 32, thereby improving the hydrogen and oxygen separation efficiency and making the liquid flow inside the first auxiliary storage tank 15 relatively smooth, thereby improving the overall stability of the device during operation.

[0047] The outer wall of the drain electric ball valve 18 is plugged with a liquid guide tube 27, a liquid collecting box 26 is fixed to the outer wall of the liquid guide tube 27, and a drain tube 25 is plugged with the outer wall of one side of the liquid collecting box 26;

[0048] The top outer wall of the liquid collecting box 26 is provided with an air guide cover 24, the outer wall of the air guide cover 24 is plugged with a connecting pipe 23, the outer wall of the exhaust electric ball valve 19 is plugged with an air guide pipe 20, the outer wall of the air guide pipe 20 is fixed with an air collecting box 21, the outer wall of one side of the air collecting box 21 is plugged with an exhaust pipe 22, and the connecting pipe 23 is plugged into the bottom inner wall of the air collecting box 21;

[0049] The top inner wall of the gas collecting box 21 is plugged with a sealing frame 34, and the inner wall of the sealing frame 34 is fixed with a water-absorbing cotton net 40;

[0050] A set of brackets 37 are fixed to the inner wall of the liquid collecting box 26, a rotating shaft 39 is rotatably connected to the inner wall of the bracket 37, and a plurality of paddles 38 are fixed to the outer wall of the rotating shaft 39;

[0051] The liquid discharged into the liquid guide pipe 27 through the liquid discharge electric ball valve 18 will enter the interior of the liquid collecting box 26. When entering the liquid collecting box 26, the liquid will impact the paddle 38 on the outer wall of the rotating shaft 39, thereby driving the rotating shaft 39 and the paddle 38 to rotate as a whole through the water flow, stirring the liquid flowing through the interior of the liquid collecting box 26, so that the residual hydrogen and oxygen in the liquid entering the liquid collecting box 26 can float up quickly, and flow into the connecting pipe 23 through the air guide cover 24, and then flow into the gas collecting box 21 through the connecting pipe 23, and be transported to the corresponding storage tank or discharged into the atmosphere through the exhaust pipe 22 on one side of the gas collecting box 21, thereby improving the overall separation and recovery effect of the device on hydrogen and oxygen.

[0052] The gas that enters the gas collecting box 21 through the air guide pipe 20 and the connecting pipe 23 will be discharged through the exhaust pipe 22 after being filtered by the absorbent cotton net 40. The absorbent cotton net 40 can adsorb the residual water vapor in the gas, thereby improving the purity of the separated oxygen and hydrogen. The staff can regularly pull out the sealing frame 34 and replace the absorbent cotton net 40.

[0053] When this embodiment is in use, the feed pipe 29 is connected to the pipeline for transporting hydrogen, oxygen, water vapor and liquid into the first auxiliary storage tank 15. When the gas and liquid are transported to the inside of the liquid guiding cover 30 through the feed pipe 29, the arc-shaped buffer pad 35 located on the inner wall of the bottom of the liquid guiding cover 30 can buffer the falling liquid, so that the liquid entering the liquid guiding cover 30 can stably flow into the first auxiliary storage tank 15 through the multiple discharge pipes 31 connected to the outer wall of the liquid guiding cover 30. At the same time, when the gas and liquid pass through the discharge pipe 31, the hydrogen or oxygen mixed in the liquid will quickly float to the surface and enter the first auxiliary storage tank 15 through the exhaust hole 36 on the outer wall of the discharge pipe 31.

[0054] The liquid flowing into the first auxiliary storage tank 15 through the discharge pipe 31 will be blocked by the partition 32. As the amount of liquid increases, the liquid will overflow the partition 32 and flow into the other side. At this time, the hydrogen or oxygen in the liquid will quickly dissipate when overflowing the partition 32, thereby improving the hydrogen and oxygen separation efficiency and making the liquid flow inside the first auxiliary storage tank 15 relatively smooth. The liquid discharged into the liquid guide pipe 27 through the discharge electric ball valve 18 will enter the liquid collecting box 26. When entering the liquid collecting box 26, the liquid will impact the paddles 38 on the outer wall of the rotating shaft 39, thereby driving the rotating shaft 39 and the paddles 38 to rotate as a whole through the water flow, stirring the liquid flowing through the liquid collecting box 26, thereby allowing the residual hydrogen and oxygen in the liquid entering the liquid collecting box 26 to quickly float up, and merge into the connecting pipe 23 through the air guide cover 24, and then merge into the gas collecting box 21 through the connecting pipe 23, and be transported to the corresponding storage tank or discharged into the atmosphere through the exhaust pipe 22 on one side of the gas collecting box 21.

[0055] The gas entering the gas collecting box 21 through the air guide pipe 20 and the connecting pipe 23 will be discharged through the exhaust pipe 22 after being filtered by the water-absorbent cotton net 40. The water-absorbent cotton net 40 can absorb the residual water vapor in the gas.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A process system for reducing the hydrogen and oxygen content of alkali liquid and the mixing of hydrogen and oxygen in alkaline hydrogen production, comprising a hydrogen alkali liquid separator (4), an oxygen alkali liquid separator (7), a hydrogen alkali liquid scrubber (3), an oxygen alkali liquid scrubber (8), a hydrogen cooler (2), an oxygen cooler (9), a hydrogen gas-liquid separator (1) and an oxygen gas-liquid separator (10), characterized in that: The hydrogen alkali liquid separator (4), the oxygen alkali liquid separator (7), the hydrogen alkali liquid scrubber (3), the oxygen alkali liquid scrubber (8), the hydrogen cooler (2), the oxygen cooler (9), the hydrogen gas-liquid separator (1) and the oxygen gas-liquid separator (10) are interconnected via pipelines; the outer walls of the hydrogen alkali liquid separator (4) and the oxygen alkali liquid separator (7) are connected with a hydrogen-oxygen alkali liquid separator pressure balance pipe (14) and an oxygen alkali liquid and hydrogen alkali liquid mixed reflux pipe (13); the oxygen alkali liquid and hydrogen alkali liquid mixed reflux pipe (13) is connected to a alkali liquid pump front end cooler; the hydrogen gas-liquid separator (1) and the hydrogen cooler are connected to the outer walls of the hydrogen alkali liquid separator (4) and the oxygen alkali liquid separator (7); (2) A hydrogen side water vapor return pipeline (6) and a hydrogen and water vapor return pipeline (5) are respectively arranged on the outer wall, and an oxygen cooler (9) and an oxygen gas-liquid separator (10) are respectively arranged on the outer wall with an oxygen and water vapor return pipe (11) and an oxygen side water vapor return pipe (12). The hydrogen side water vapor return pipeline (6) and the hydrogen and water vapor return pipeline (5) are connected to the first auxiliary storage tank (15) through a pipeline, and the oxygen and water vapor return pipe (11) and the oxygen side water vapor return pipe (12) are connected to the second auxiliary storage tank (16) through a pipeline. The first auxiliary storage tank (15) and the second auxiliary storage tank (16) have the same structure.

2. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 1, characterized in that: The inner walls of the first auxiliary storage tank (15) and the second auxiliary storage tank (16) are respectively provided with a liquid level transmitter (17); the upper and lower outer walls of the first auxiliary storage tank (15) and the second auxiliary storage tank (16) are respectively connected to an exhaust electric ball valve (19) and a drain electric ball valve (18) through pipelines; the liquid level transmitter (17), the drain electric ball valve (18) and the exhaust electric ball valve (19) are respectively electrically connected to a main control panel of the system.

3. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 2, characterized in that: A feed pipe (29) is fixed on the outer wall of the first auxiliary storage tank (15), a liquid guide cover (30) is inserted into the outer wall of the bottom of the feed pipe (29), a plurality of discharge pipes (31) are inserted into the outer wall of the liquid guide cover (30), and a plurality of exhaust holes (36) are opened on the outer wall of the discharge pipe (31).

4. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 3, characterized in that: An arc-shaped buffer pad (35) is fixed to the inner wall of the bottom of the liquid-conducting cover (30).

5. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 3, characterized in that: A plurality of partitions (32) are fixed to the inner wall of the first auxiliary storage tank (15), a diverter block (33) is fixed to the outer wall of the partition (32), and a plurality of support legs (28) are fixed to the outer wall of the first auxiliary storage tank (15).

6. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 2, characterized in that: The outer wall of the liquid discharge electric ball valve (18) is plugged with a liquid guide tube (27), a liquid collecting box (26) is fixed to the outer wall of the liquid guide tube (27), and a liquid discharge tube (25) is plugged with the outer wall of one side of the liquid collecting box (26).

7. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 6, characterized in that: The top outer wall of the liquid collecting box (26) is provided with an air guide cover (24), the outer wall of the air guide cover (24) is plugged with a connecting pipe (23), the outer wall of the exhaust electric ball valve (19) is plugged with an air guide pipe (20), the outer wall of the air guide pipe (20) is fixed with an air collecting box (21), the outer wall of one side of the air collecting box (21) is plugged with an exhaust pipe (22), and the connecting pipe (23) is plugged into the bottom inner wall of the air collecting box (21).

8. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 7, characterized in that: A sealing frame (34) is inserted into the inner wall of the top of the gas collecting box (21), and a water-absorbing cotton net (40) is fixed to the inner wall of the sealing frame (34).

9. A process system for reducing the hydrogen and oxygen content of alkali solution and the mixing of hydrogen and oxygen in alkaline hydrogen production according to claim 7, characterized in that: A group of brackets (37) are fixed on the inner wall of the liquid collecting box (26); a rotating shaft (39) is rotatably connected to the inner wall of the bracket (37); and a plurality of paddles (38) are fixed on the outer wall of the rotating shaft (39).

Images