Hydrogen and oxygen gas scrubber

Abstract

The utility model discloses an oxyhydrogen gas scrubber which comprises a cylinder body, the cylinder body is arranged on a gas outlet of a gas-liquid separator, an overflow pipe and a gas outlet pipe are arranged in the cylinder body, the bottom of the gas outlet pipe is communicated and connected with the gas outlet of the gas-liquid separator, and the bottom of the overflow pipe extends below the liquid level in the gas-liquid separator. A plurality of air outlet holes are formed in the surface of the air outlet pipe, an exhaust connector is formed in the top of the barrel, a liquid supplementing connector is formed in the lower portion of the surface of the barrel, and a filter screen is further arranged in the position, between the exhaust connector and the top of the overflow pipe, of the barrel. The washing machine is good in washing effect, safe and reliable, and liquid can be discharged without shutdown.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production, in particular to a hydrogen and oxygen gas scrubber. Background Art

[0002] In the hydrogen production process, the hydrogen produced by electrolysis in the electrolyzer is separated into gas and liquid in the gas-liquid separator. The separated hydrogen is usually washed with a collector to remove the alkaline substances in the hydrogen. The washed hydrogen then enters the shell and tube heat exchanger for cooling, and finally released or enters the gas storage tank.

[0003] The above-mentioned collector is not effective in washing hydrogen, and a large amount of alkaline vapor will still enter the downstream cooler along with the hydrogen. The liquid accumulated in the collector also needs to be discharged from the drain port. The alkaline solution cannot return to the electrolytic cell. The alkaline solution in the electrolytic cell will decrease and need to be frequently replenished. When too much liquid accumulates in the collector, the machine needs to be shut down to discharge the liquid, which is cumbersome and dangerous. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a hydrogen-oxygen gas scrubber with good scrubbing effect, no need to stop the machine for draining liquid, and safe and reliable.

[0005] In order to solve the above technical problems, the utility model provides a hydrogen and oxygen gas scrubber, including a cylinder, which is arranged on the gas outlet of a gas-liquid separator, an overflow pipe and an outlet pipe are arranged in the cylinder, the bottom of the outlet pipe is through-connected with the gas outlet of the gas-liquid separator, the bottom of the overflow pipe extends below the liquid level in the gas-liquid separator, a plurality of outlet holes are arranged on the surface of the outlet pipe, an exhaust interface is arranged on the top of the cylinder, a liquid replenishment interface is arranged on the lower part of the surface of the cylinder, and a filter screen is also arranged in the cylinder between the exhaust interface and the top of the overflow pipe.

[0006] Furthermore, a connecting flange plate is provided at the bottom of the cylinder, an overflow hole and a vent are provided on the connecting flange plate, the overflow pipe passes through the overflow hole and is sealedly connected to the overflow hole, and the air outlet pipe is connected through the vent and is sealed to the vent.

[0007] Furthermore, the air outlet pipe includes a supporting main pipe and an air guide pipe arranged in an S shape, one end of the air guide pipe is blocked and the other end is connected to the top of the supporting main pipe, the air guide pipe sleeve is arranged around the supporting main pipe, and the air outlet hole is arranged on the surface of the air guide pipe.

[0008] Furthermore, the overflow pipe is arranged in the air guide pipe, and the outer wall of the overflow pipe is fixedly connected to the inner wall of the air guide pipe.

[0009] Furthermore, the height of the overflow port at the top of the overflow pipe is higher than the height of the top of the air outlet pipe.

[0010] Furthermore, the filter screen is formed by winding a metal mesh belt along a length direction.

[0011] Furthermore, the filter screen is formed by overlapping a plurality of metal meshes, an installation gap is provided between two adjacent metal meshes, and the mesh holes are staggered.

[0012] Furthermore, an annular mounting seat is arranged in the cylinder, a plurality of step portions are arranged on the annular mounting seat, and a plurality of metal mesh sheets are arranged on the corresponding step portions.

[0013] Beneficial effects of the utility model:

[0014] 1. The cylinder is used to contain deionized water. Using deionized water to wash the hydrogen containing alkali is better than washing the hydrogen with a trap, and there is no need to consider the drainage problem. The liquid after washing is alkali liquid, which can overflow into the separator by itself. The alkali liquid can be reused, which can effectively increase the cycle of replenishing alkali liquid.

[0015] 2. The setting of the overflow pipe can effectively reduce the need to replenish the system with raw deionized water. When the water reaches a certain liquid level, it can enter the separator through the overflow port to realize the function of replenishing the raw deionized water for the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model when it is installed and used;

[0018] Figure 3 It is a schematic diagram of the winding formation of the filter screen of the utility model;

[0019] Figure 4 It is a schematic diagram of the overlapping arrangement of the filter screens of the present utility model. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] Reference Figure 1 and Figure 2As shown, an embodiment of the hydrogen and oxygen gas scrubber of the utility model has been proved through experiments that the alkaline vapor in hydrogen or oxygen can be effectively adsorbed by deionized water. Therefore, the present application is designed based on the method of deionized water adsorption, and specifically includes a cylinder 1, which is arranged on the gas outlet 3 of the gas-liquid separator 2, and an overflow pipe 4 and an air outlet pipe 5 are arranged in the cylinder. The bottom of the air outlet pipe is through-connected with the gas outlet of the gas-liquid separator, and the bottom of the overflow pipe extends into the liquid level in the gas-liquid separator. A plurality of air outlet holes 6 are arranged on the surface of the air outlet pipe, an exhaust interface 7 is arranged on the top of the cylinder, a liquid replenishment interface 8 is arranged on the lower part of the cylinder surface, and a filter screen 9 is also arranged in the cylinder between the exhaust interface and the top of the overflow pipe.

[0022] When in use, deionized water is delivered into the cylinder through the liquid replenishment interface. The deionized water needs to cover the outlet pipe to ensure that the outlet holes on the outlet pipe are all in the deionized water. The outlet holes can be a microporous structure to prevent deionized water from entering the outlet pipe from the outlet holes. After electrolysis in the electrolytic cell 111, the gas and liquid enter the gas-liquid separator for separation, and then the gas enters the cylinder through the outlet pipe and the outlet holes on the outlet pipe, that is, the gas is dispersed through the many outlet holes on the outlet pipe, and a large number of small hydrogen bubbles are formed in the deionized water, thereby increasing the contact area between hydrogen and deionized water. A large number of small bubbles are washed in deionized water, and the alkali in the hydrogen is washed away. During the washing process, the small bubbles float upward under the buoyancy of the deionized water, and the floating small bubbles merge and gather to form large bubbles. After the large bubbles float to the surface of the water, the hydrogen will contain some small water droplets. At this time, due to the action of pressure, the clean hydrogen continues to flow upward and reaches the filter, and the small water droplets in the gas are intercepted by the filter. The small water droplets in the filter flow back into the cylinder due to gravity, and the hydrogen is discharged from the exhaust interface to the downstream equipment.

[0023] During the continuous filtration process, the alkali content in the deionized water will increase. Therefore, adding deionized water through the liquid replenishment interface can effectively reduce the concentration of the alkali solution, thereby ensuring the washing quality. After adding deionized water, the liquid level in the cylinder rises and will eventually overflow and be discharged from the overflow pipe. Since the overflow pipe extends below the liquid level in the gas-liquid separator, the overflowed alkali solution will enter the gas-liquid separator. The alkali solution in the gas-liquid separator can be discharged into the electrolytic cell for continued use, so that the alkali solution can be reused, reducing the risk of contact with the alkali solution and increasing the cycle of replenishing the alkali solution.

[0024] Since the entire electrolysis system is under pressure, a plunger pump is required to add deionized water into the cylinder during the replenishment process. The amount of deionized water added is determined by the amount of liquid in the gas-liquid separator reaching a set height. After reaching the set height, the plunger pump is turned off and the water replenishment is stopped. By controlling the interval time of the water replenishment cycle, the alkali content of the deionized water in the cylinder can be kept low, so the structure can achieve better washing effects.

[0025] Based on the above-mentioned usage, a connecting flange plate 10 is provided at the bottom of the cylinder, an overflow hole 11 and a vent hole 12 are provided on the connecting flange plate, an overflow pipe is provided through the overflow hole and is sealed with the overflow hole, an air outlet pipe is connected through the vent hole and is sealed with the vent hole, by directly locking the cylinder on the gas-liquid separator with the connecting flange plate, the use of a support frame can be omitted, and the overall firmness and stability are strong. The connecting flange plate can also be used as the bottom surface of the cylinder, and the cylinder is directly welded to the connecting flange plate, which is convenient to operate. During preparation, the overflow pipe and the air outlet pipe can be welded and fixed on the connecting flange plate first to ensure the connection strength and sealing effect, and then the cylinder can be welded to the connecting flange plate. The upper part of the cylinder can be a split structure, and after the filter is installed, the upper part is welded to ensure the overall strength and sealing effect.

[0026] The above-mentioned air outlet pipe includes a supporting main pipe 13 and an air guide pipe 14 arranged in an S shape. One end of the air guide pipe is blocked and the other end is connected to the top of the supporting main pipe. The air guide pipe sleeve is arranged around the supporting main pipe, and the air outlet hole is arranged on the surface of the air guide pipe. The supporting main pipe provides effective strength to ensure that the water flow force caused by the gas flow will not cause damage to the air outlet pipe, and the S-shaped air guide pipe can provide a larger air outlet area to improve the washing efficiency. The overflow pipe can also be arranged in the air guide pipe, and the outer wall of the overflow pipe is fixedly connected to the inner wall of the air guide pipe to further strengthen the fixing strength of the air guide pipe.

[0027] The height of the overflow port at the top of the overflow pipe is higher than the top height of the air outlet pipe, ensuring that the liquid level of the deionized water is higher than the setting height of the air outlet hole, thereby ensuring the washing effect.

[0028] Reference Figure 3 As shown, the filter screen is formed by winding a metal mesh belt 15 along the length direction, and a pancake-shaped structure is formed after winding. The metal mesh belt is formed by two layers of metal wires connected and matched, so that after winding, there is still a gap between adjacent surfaces for gas to be discharged. The filter screen prepared in this way is simple to prepare and can ensure the filtering effect. After winding, it can be directly fixed in the cylinder by spot welding. Adjacent winding layers can also be fixed by spot welding, and the preparation cost is low.

[0029] Reference Figure 4As shown, the above-mentioned filter screen can also be formed by overlapping multiple metal meshes 16, with an installation gap between two adjacent metal meshes and the mesh holes staggered, so as to ensure the filtering effect and meet the gas discharge requirements. When the metal mesh is formed by punching holes in a flat material, in order to improve the convenience of installation and ensure the existence of an exhaust gap, an annular mounting seat 17 can be provided in the cylinder, and a plurality of step portions 18 are provided on the annular mounting seat. Multiple metal meshes are arranged on the corresponding step portions, and the height of the step portion is the sum of the thickness of the metal mesh and the required gap thickness. When assembling, it is directly placed on the step portion and fixed by welding, which is convenient to operate and has high installation accuracy.

[0030] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in this technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A hydrogen and oxygen gas scrubber, characterized in that: It includes a cylinder body, which is arranged on the air outlet of the gas-liquid separator, an overflow pipe and an air outlet pipe are arranged in the cylinder body, the bottom of the air outlet pipe is through-connected with the air outlet of the gas-liquid separator, the bottom of the overflow pipe extends below the liquid level in the gas-liquid separator, a plurality of air outlet holes are arranged on the surface of the air outlet pipe, an exhaust interface is arranged on the top of the cylinder body, a liquid replenishment interface is arranged on the lower part of the surface of the cylinder body, and a filter screen is also arranged in the cylinder body between the exhaust interface and the top of the overflow pipe.

2. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: A connecting flange plate is provided at the bottom of the cylinder, an overflow hole and a vent are provided on the connecting flange plate, the overflow pipe passes through the overflow hole and is sealedly connected to the overflow hole, and the air outlet pipe is connected through the vent and is sealed to the vent.

3. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: The air outlet pipe includes a supporting main pipe and an air guide pipe arranged in an S shape. One end of the air guide pipe is blocked and the other end is connected to the top of the supporting main pipe. The air guide pipe sleeve is arranged around the supporting main pipe, and the air outlet hole is arranged on the surface of the air guide pipe.

4. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: The overflow pipe is arranged in the air guide pipe, and the outer wall of the overflow pipe is fixedly connected to the inner wall of the air guide pipe.

5. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: The height of the overflow port at the top of the overflow pipe is higher than the height of the top of the air outlet pipe.

6. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: The filter screen is formed by winding a metal mesh belt along a length direction.

7. The hydrogen and oxygen gas scrubber according to claim 1, characterized in that: The filter screen is formed by overlapping a plurality of metal mesh sheets, an installation gap is provided between two adjacent metal mesh sheets, and the mesh holes are arranged in a staggered manner.

8. The hydrogen and oxygen gas scrubber according to claim 7, characterized in that: An annular mounting seat is arranged in the cylinder body, a plurality of step portions are arranged on the annular mounting seat, and a plurality of metal mesh sheets are arranged on the corresponding step portions.

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