Hydrogen separation device for hydrogen recovery

Abstract

The utility model relates to the technical field of hydrogen separation, and discloses a hydrogen separation device for hydrogen recovery, which comprises a pretreater, the top end of the pretreater is communicated with a gas-liquid separator through a pipeline, one side of the gas-liquid separator is communicated with a heater through a pipeline, and the bottom end of one side of the heater is communicated with a membrane separator through a pipeline. According to the utility model, the mixed gas is desalted and washed through the pretreater to remove methanol and solid impurities, and meanwhile, the alcohol washing towers with different sizes are matched, so that the small alcohol washing towers can be adaptively selected to be used under the condition of small gas flow, the use amount of desalted water is correspondingly reduced, waste is avoided, and the cost is reduced. And the dryness of the mixed gas to be separated is ensured by utilizing the effects of the subsequent gas-liquid separator and the heater, and the possibility of dew formation of the mixed gas in the membrane separator is reduced through a heating mode, so that the hydrogen separation smoothness and the separation efficiency are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen separation, in particular to a hydrogen separation device for hydrogen recovery. Background Art

[0002] In the process of producing methanol from tail gas of electric furnace, the off-gas from methanol synthesis is mixed with a variety of gases, including methanol, oxygen, hydrogen, etc. Therefore, in the process of recovering the mixed gas, it is necessary to adopt layer-by-layer purification and separation measures in accordance with the different material characteristics in the mixed gas, mainly including alcohol washing, gas-liquid separation, hydrogen separation, and TSA purification treatment. As hydrogen is a green energy, its separation and recovery step is an important step in the process production link;

[0003] Chinese patent authorization announcement number CN218465505U discloses a hydrogen separation device for hydrogen recovery, including a shell, and the utility model also includes a filter assembly arranged at the bottom of the shell and a separation assembly arranged in the shell chamber and located above the filter assembly. In actual use, it can effectively solve the technical problem that dust particles block the filter cotton when filtering gas, causing poor gas circulation. The above-mentioned prior art scheme has the following shortcomings: the device uses a spiral filter screen generally arranged in water, and with the help of rotation, the dust on the filter screen is cleaned, but this method mainly removes dust in the mixed gas, so its filter mesh is generally small, and after passing through the water flow, it is easy to make the mesh to generate bubbles, thereby blocking the filter hole, affecting the dust removal effect, and because the water droplets are attached to the filter screen, the humidity of the mixed gas passing through is increased, and then when passing through the subsequent hydrogen separation membrane cylinder, the high-humidity mixed gas is easy to increase the possibility of condensation on the membrane surface, thereby affecting the hydrogen separation effect, so there is a certain room for improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a hydrogen separation device for hydrogen recovery, so as to solve the problem that the existing hydrogen separation device for hydrogen recovery proposed in the above background technology has a general dust treatment effect on the mixed gas and increases the humidity of the mixed gas, thereby affecting the subsequent hydrogen separation efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrogen separation device for hydrogen recovery, comprising a preprocessor, the top of the preprocessor is connected to a gas-liquid separator through a pipeline, and one side of the gas-liquid separator is connected to a heater through a pipeline, and the bottom of one side of the heater is connected to a membrane separator through a pipeline, wherein the mixed gas is sequentially transmitted from the preprocessor to the gas-liquid separator, the heater, and the membrane separator, and then separated and discharged, the preprocessor comprises a large alcohol wash tower, and a wire mesh demister is arranged at the top of the large alcohol wash tower, a small alcohol wash tower is arranged on one side of the large alcohol wash tower, and the top of the small alcohol wash tower is connected to an air guide pipe, one end of the air guide pipe penetrates into the interior of the large alcohol wash tower, and the air guide pipe located in the large alcohol wash tower is below the wire mesh demister, and the bottoms of the large alcohol wash tower and the small alcohol wash tower are both provided with alcohol wash components, the diameter of the small alcohol wash tower is smaller than the diameter of the large alcohol wash tower, and the inner cavity capacity of the small alcohol wash tower is half of the inner cavity capacity of the large alcohol wash tower.

[0006] Preferably, the alcohol wash assembly includes three baffles fixedly connected to the inner cavities of the large alcohol wash tower and the small alcohol wash tower at equal intervals, and a liquid outlet pipe is penetrated at the bottom end of the large alcohol wash tower and the small alcohol wash tower, and the inlet of the liquid outlet pipe is located below the baffle, an air inlet pipe is penetrated at one side of the large alcohol wash tower and the small alcohol wash tower, and the outlet end of the air inlet pipe is located below the baffle, a liquid inlet pipe is penetrated at the other side of the large alcohol wash tower and the small alcohol wash tower, and the outlet end of the liquid inlet pipe is located above the baffle, and desalted water is supplemented to the inside of the large alcohol wash tower and the small alcohol wash tower by using a spray pipe and a liquid inlet pipe, and a spray pipe is arranged inside the large alcohol wash tower and the small alcohol wash tower, and the spray pipe is located above the liquid inlet pipe, and a flow control valve is arranged on the spray pipe.

[0007] Preferably, adjacent baffles are staggered up and down, and the bottom end surface of the baffle is corrugated, and the baffle is always below the liquid level line, and the baffle is used to make the mixed gas move upward in the desalted water in an S shape.

[0008] Preferably, the input ends of the spray pipes located inside the large alcohol wash tower and the small alcohol wash tower are commonly connected to the spray liquid main pipe, and the input ends of the air intake pipes located inside the large alcohol wash tower and the small alcohol wash tower are commonly connected to the air intake main pipe, and a flow sensor is provided at one end of the air intake main pipe to monitor the air intake volume of the mixed gas, the nodes of the air intake main pipe and the spray liquid main pipe are spherical, and ball plugs are movably installed inside the nodes of the air intake main pipe and the spray liquid main pipe, an L-shaped through hole is opened inside the ball plug, and the ball plug is used to control the air intake direction of the mixed gas and the water intake direction of the desalted water, and a rotating component is provided on the outside of the air intake main pipe to synchronously control the same-direction rotation of the upper and lower ball plugs.

[0009] Preferably, the rotating assembly includes a U-shaped frame, and the U-shaped frame is arranged on the inner side of the air intake manifold and fixedly connected to the ground, an electric push rod is installed at the bottom end of the U-shaped frame, and a rectangular frame is fixedly connected to the top of the electric push rod, and the two sides of the rectangular frame are connected to slide up and down through a slider and the U-shaped frame, one side of the rectangular frame is evenly provided with teeth, and one side of the teeth is meshed with two gears distributed up and down.

[0010] Preferably, the position of the gear corresponds to the position of the ball plug, and the shaft end of the gear is fixedly connected to one side of the ball plug located inside the air intake manifold and the spray liquid manifold, respectively, and the gear, the ball plug and the inlet end of the same row of air intake manifolds or spray liquid manifolds are coaxially and collinearly distributed.

[0011] Preferably, the output end of the flow sensor is electrically connected to the input end of the electric push rod through the single chip microcomputer. When the mixed gas intake volume is less than the preset value, the ball plug is started to rotate so that the mixed gas and desalted water are unidirectionally introduced into the small alcohol washing tower.

[0012] Preferably, the heater comprises a heating tank, and a heating rod is fixedly installed at the bottom end inside the heating tank, a spiral tube is arranged inside the heating tank, and the heating rod passes through the spiral center of the spiral tube, and a rotary fan is installed at the top end inside the heating tank.

[0013] Preferably, the air inlet end of the spiral tube is located at the top, and the air outlet end is located at the bottom, and the inner diameter of the upper half of the spiral tube is smaller than the inner diameter of the lower half.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) Through the function of the pre-treatment device, the desalted water washing method is used to achieve the water washing separation of methanol in the mixed gas, which is convenient for the subsequent extraction and separation of hydrogen in the mixed gas. On the other hand, fixed impurities such as dust can be directly retained in the desalted water during the water washing process. By using the large alcohol washing tower and the small alcohol washing tower, in conjunction with the control function of the rotating components, different alcohol washing specifications can be adaptively adopted under different ventilation volume environments to reduce the waste of alcohol washing desalted water;

[0016] The baffle is set to increase the flow path of the mixed gas in the brine water body, thereby increasing the alcohol washing time of the mixed gas and improving the alcohol washing effect. The corrugated structure of the baffle can facilitate the retention of bubbles carried by the mixed gas during the rising process, thereby reducing the bubble content in the rising gas.

[0017] (2) The spiral setting of the spiral tube increases the contact area of ​​the mixed gas flow in the heating tank, thereby ensuring that the gas reaches the expected heat rise value before entering the membrane separator, thereby avoiding condensation of the gas in the membrane separator and ensuring the normal separation of hydrogen. The vortex fan is used to improve the fluidity of the hot gas circulation inside the heating tank and improve the heating uniformity of the passing gas. The different diameters of the upper and lower sections of the spiral tube are used to achieve a certain slow flow effect, thereby reducing the impact force of the gas entering the membrane separator on the membrane structure and reducing the damage to the membrane during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional three-dimensional structural schematic diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional three-dimensional structure of the large alcohol washing tower of the utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the spiral tube of the utility model;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating assembly of the utility model;

[0024] Figure 6 It is a perspective three-dimensional structural schematic diagram of the ball plug of the utility model.

[0025] Explanation of the reference numerals in the figure: 1. Pre-treatment device; 11. Large alcohol washing tower; 12. Small alcohol washing tower; 13. Wire mesh demister; 14. Air guide pipe; 15. Alcohol washing assembly; 151. Air inlet pipe; 152. Baffle; 153. Liquid inlet pipe; 154. Spray pipe; 2. Gas-liquid separator; 3. Heater; 31. Heating tank; 32. Spiral tube; 33. Rotary fan; 34. Heating rod; 4. Membrane separator; 5. Air inlet main pipe; 6. Spray liquid main pipe; 7. Flow sensor; 8. Ball plug; 9. L-shaped through hole; 10. Rotating assembly; 101. Rectangular frame; 102. Gear; 103. Sliding block; 104. U-shaped frame; 105. Electric push rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 6 The utility model provides an embodiment: a hydrogen separation device for hydrogen recovery, comprising a preprocessor 1, the top of the preprocessor 1 is connected to a gas-liquid separator 2 through a pipeline, and one side of the gas-liquid separator 2 is connected to a heater 3 through a pipeline;

[0028] The heater 3 includes a heating tank 31, and a heating rod 34 is fixedly installed at the bottom end of the heating tank 31, a spiral tube 32 is arranged inside the heating tank 31, and the heating rod 34 runs through the spiral center of the spiral tube 32, and a rotating fan 33 is installed at the top end of the heating tank 31;

[0029] The air inlet end of the spiral tube 32 is located at the top, and the air outlet end is located at the bottom. The inner diameter of the upper half of the spiral tube 32 is smaller than the inner diameter of the lower half.

[0030] Specifically, Figure 1 , Figure 2 and Figure 5 As shown, the spiral tube 32 is used to increase the heating area of ​​the gas, so that the gas is quickly heated up, and the mixed gas is kept away from the dew point by heating the gas, thereby preventing the mixed gas from condensing on the membrane surface during membrane separation, thereby ensuring the stability of subsequent hydrogen separation;

[0031] The bottom end of one side of the heater 3 is connected to a membrane separator 4 through a pipeline, wherein the mixed gas is sequentially transmitted from the preprocessor 1 to the gas-liquid separator 2, the heater 3, and the membrane separator 4, and then separated and discharged. The preprocessor 1 includes a large alcohol wash tower 11, and a wire mesh demister 13 is arranged at the top of the large alcohol wash tower 11. A small alcohol wash tower 12 is arranged on one side of the large alcohol wash tower 11, and an air guide pipe 14 is connected to the top of the small alcohol wash tower 12. One end of the air guide pipe 14 passes through the interior of the large alcohol wash tower 11, and the air guide pipe 14 located in the large alcohol wash tower 11 is below the wire mesh demister 13. The bottom ends of the large alcohol wash tower 11 and the small alcohol wash tower 12 are both provided with alcohol wash components 15. The diameter of the small alcohol wash tower 12 is smaller than that of the large alcohol wash tower 11, and the inner cavity capacity of the small alcohol wash tower 12 is half of the inner cavity capacity of the large alcohol wash tower 11.

[0032] The alcohol washing assembly 15 includes three baffles 152 fixedly connected to the inner cavities of the large alcohol washing tower 11 and the small alcohol washing tower 12 at equal intervals, and the bottom ends of the large alcohol washing tower 11 and the small alcohol washing tower 12 are penetrated with a liquid outlet pipe, and the inlet of the liquid outlet pipe is located below the baffle 152, and one side of the large alcohol washing tower 11 and the small alcohol washing tower 12 is penetrated with an air inlet pipe 151, and the outlet end of the air inlet pipe 151 is located below the baffle 152. A liquid inlet pipe 153 is passed through the other side of the alcohol tower 12, and the outlet end of the liquid inlet pipe 153 is located above the baffle 152. Desalted water is added to the large alcohol wash tower 11 and the small alcohol wash tower 12 by using a spray pipe 154 and a liquid inlet pipe 153. The large alcohol wash tower 11 and the small alcohol wash tower 12 are provided with a spray pipe 154, and the spray pipe 154 is located above the liquid inlet pipe 153, and a flow control valve is provided on the spray pipe 154.

[0033] Adjacent baffles 152 are staggered up and down, and the bottom end surface of the baffle 152 is corrugated, and the baffle 152 is always below the liquid level line, and the baffle 152 is used to make the mixed gas move upward in the desalted water in an S shape;

[0034] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when in use, the alcohol washing component 15 is used to infiltrate the mixed gas to remove impurities and wash alcohol, and the baffle 152 is used to increase the flow path of the gas in the desalted water, and to intercept part of the bubbles carried in the rising gas, thereby further improving the effect of solid impurities and alcohol washing;

[0035] The input ends of the spray pipes 154 located inside the large alcohol washing tower 11 and the small alcohol washing tower 12 are commonly connected to the spray liquid main pipe 6, and the input ends of the air intake pipes 151 located inside the large alcohol washing tower 11 and the small alcohol washing tower 12 are commonly connected to the air intake main pipe 5, and a flow sensor 7 is provided at one end of the air intake main pipe 5 to monitor the air intake amount of the mixed gas. The nodes of the air intake main pipe 5 and the spray liquid main pipe 6 are both spherical, and ball plugs 8 are movably installed inside the nodes of the air intake main pipe 5 and the spray liquid main pipe 6. An L-shaped through hole 9 is opened inside the ball plug 8. The ball plug 8 is used to control the air intake direction of the mixed gas and the water intake direction of the desalted water. A rotating component 10 is provided on the outside of the air intake main pipe 5 to synchronously control the same-direction rotation of the upper and lower ball plugs 8;

[0036] The rotating assembly 10 includes a U-shaped frame 104, and the U-shaped frame 104 is arranged on the inner side of the intake manifold 5 and fixedly connected to the ground. An electric push rod 105 is installed at the bottom end of the U-shaped frame 104, and a rectangular frame 101 is fixedly connected to the top of the electric push rod 105. The two sides of the rectangular frame 101 are connected to the U-shaped frame 104 by sliding blocks 103 and sliding up and down. One side of the rectangular frame 101 is evenly provided with teeth, and one side of the teeth is meshed with two gears 102 distributed up and down.

[0037] The position of the gear 102 corresponds to the position of the ball plug 8 one by one, and the rotating shaft end of the gear 102 is fixedly connected to one side of the ball plug 8 located inside the air intake manifold 5 and the spray liquid manifold 6, respectively. The gear 102, the ball plug 8 and the inlet end of the air intake manifold 5 or the spray liquid manifold 6 in the same row are coaxially and collinearly distributed;

[0038] The output end of the flow sensor 7 is electrically connected to the input end of the electric push rod 105 through the single chip microcomputer. When the mixed gas intake is less than the preset value, the ball plug 8 is started to rotate so that the mixed gas and the desalted water are introduced into the small alcohol washing tower 12 in a one-way manner.

[0039] Specifically, Figure 1 and Figure 6 As shown, when in use, the function of the rotating assembly 10 is utilized to implement small-flow gas processing with a small device to reduce the amount of desalted water used.

[0040] Working principle: When the utility model is used, the pressurized mixed gas is first passed into the interior of the intake manifold 5, and the gas flow is monitored by the flow sensor 7. When the flow is small, the rotating assembly 10 is started to allow the gas to enter the desalted water in the small alcohol washing tower 12, and the methanol is separated by the reaction between the methanol in the mixed gas and the desalted water, and then other gases are made to rise, and the baffle 152 is set to intercept the foam in the rising gas to a certain extent, and the gas is made to move upward in an S shape, and the desalted water mist is sprayed downward by the spray pipe 154 to further wash the rising gas with alcohol, and prevent solid impurities such as dust from being carried, and then the gas enters the large alcohol washing tower 11 through the air guide pipe 14, and is further defoamed by the wire mesh demister 13;

[0041] Secondly, the pretreated gas enters the gas-liquid separator 2 through the pipeline for gas-liquid separation to obtain dry gas, and then the gas enters the heater 3 through the pipeline, and the heating rod 34 and the rotary fan 33 are started to make the inside of the heating tank 31 high temperature. Due to the spiral transmission of the gas in the spiral tube 32, the gas is heated, and the mixed gas is away from the dew point. The gas enters the membrane separator 4, and the hollow fiber membrane silk assembly inside the membrane separator 4 is used. Under the action of the pressure difference between the inside and outside of the membrane core, the hydrogen in the mixed gas passes through at a faster rate to obtain the permeate gas as hydrogen, and then the remaining gas is discharged separately through another pipeline;

[0042] Finally, in the ventilation volume monitoring process of the flow sensor 7, when the detected flow rate is small, the flow sensor 7 starts the electric push rod 105 to shorten through the single-chip microcomputer, causing the electric push rod 105 to descend, thereby causing the teeth on the rectangular frame 101 to descend synchronously, and driving the upper and lower gears 102 to rotate 180° synchronously, thereby changing the direction of the air outlet end of the L-shaped through hole 9 in the ball plug 8, and then causing the gas and desalted water to change from one-way entry into the large alcohol wash tower 11 to one-way entry into the small alcohol wash tower 12.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A hydrogen separation device for hydrogen recovery, comprising a pre-processor (1), characterized in that: The top of the pre-processor (1) is connected to a gas-liquid separator (2) via a pipeline, and one side of the gas-liquid separator (2) is connected to a heater (3) via a pipeline, and the bottom of one side of the heater (3) is connected to a membrane separator (4) via a pipeline, wherein the mixed gas is sequentially transmitted from the pre-processor (1) to the gas-liquid separator (2), the heater (3), and the membrane separator (4), and then separated and discharged. The pre-processor (1) comprises a large alcohol washing tower (11), and a wire mesh demister (13) is arranged at the top of the large alcohol washing tower (11), and one side of the large alcohol washing tower (11) is provided with a A small alcohol wash tower (12) is provided, and the top of the small alcohol wash tower (12) is connected to an air guide pipe (14), one end of the air guide pipe (14) penetrates into the interior of the large alcohol wash tower (11), and the air guide pipe (14) located inside the large alcohol wash tower (11) is located below a wire mesh demister (13), and alcohol wash components (15) are provided at the bottom ends of the interiors of the large alcohol wash tower (11) and the small alcohol wash tower (12), the diameter of the small alcohol wash tower (12) is smaller than the diameter of the large alcohol wash tower (11), and the inner cavity capacity of the small alcohol wash tower (12) is half of the inner cavity capacity of the large alcohol wash tower (11).

2. A hydrogen separation device for hydrogen recovery according to claim 1, characterized in that: The alcohol wash assembly (15) comprises three baffles (152) fixedly connected at equal intervals to the inner cavities of the large alcohol wash tower (11) and the small alcohol wash tower (12); a liquid outlet pipe is passed through the bottom of the large alcohol wash tower (11) and the small alcohol wash tower (12); the inlet of the liquid outlet pipe is located below the baffle (152); an air inlet pipe (151) is passed through one side of the large alcohol wash tower (11) and the small alcohol wash tower (12); the outlet end of the air inlet pipe (151) is located below the baffle (152); A liquid inlet pipe (153) penetrates the other side of the alcohol washing tower (12), and the outlet end of the liquid inlet pipe (153) is located above the baffle (152). Desalted water is replenished into the large alcohol washing tower (11) and the small alcohol washing tower (12) by means of a spray pipe (154) and the liquid inlet pipe (153). The large alcohol washing tower (11) and the small alcohol washing tower (12) are provided with a spray pipe (154) inside, and the spray pipe (154) is located above the liquid inlet pipe (153). A flow control valve is also provided on the spray pipe (154).

3. A hydrogen separation device for hydrogen recovery according to claim 2, characterized in that: Adjacent baffles (152) are staggered in vertical arrangement, and the bottom end surfaces of the baffles (152) are corrugated. The baffles (152) are always located below the liquid level line, and the baffles (152) are used to make the mixed gas move upward in an S shape in the desalted water.

4. A hydrogen separation device for hydrogen recovery according to claim 3, characterized in that: The input ends of the spray pipes (154) located inside the large alcohol washing tower (11) and the small alcohol washing tower (12) are commonly connected to a spray liquid main pipe (6); the input ends of the air intake pipes (151) located inside the large alcohol washing tower (11) and the small alcohol washing tower (12) are commonly connected to an air intake main pipe (5); and a flow sensor (7) is arranged at one end of the air intake main pipe (5) to monitor the air intake volume of the mixed gas; the nodes of the air intake main pipe (5) and the spray liquid main pipe (6) are both spherical; and ball plugs (8) are movably installed inside the nodes of the air intake main pipe (5) and the spray liquid main pipe (6); an L-shaped through hole (9) is provided inside the ball plug (8); the ball plug (8) is used to control the air intake direction of the mixed gas and the water intake direction of the desalted water; and a rotating assembly (10) is arranged outside the air intake main pipe (5) to synchronously control the same-direction rotation of the upper and lower ball plugs (8).

5. A hydrogen separation device for hydrogen recovery according to claim 4, characterized in that: The rotating assembly (10) comprises a U-shaped frame (104), and the U-shaped frame (104) is arranged on the inner side of the intake manifold (5) and fixedly connected to the ground; an electric push rod (105) is installed at the bottom end of the U-shaped frame (104), and a rectangular frame (101) is fixedly connected to the top end of the electric push rod (105); two sides of the rectangular frame (101) are connected to the U-shaped frame (104) in an upward and downward sliding manner through a slider (103); teeth are evenly arranged on one side of the rectangular frame (101), and two gears (102) distributed upward and downward are meshed on one side of the teeth.

6. A hydrogen separation device for hydrogen recovery according to claim 5, characterized in that: The position of the gear (102) corresponds to the position of the ball plug (8) one by one, and the rotating shaft end of the gear (102) is fixedly connected to one side of the ball plug (8) located inside the air intake main pipe (5) and the spray liquid main pipe (6), respectively, and the gear (102), the ball plug (8) and the inlet end of the air intake main pipe (5) or the spray liquid main pipe (6) in the same row are coaxially and collinearly distributed.

7. A hydrogen separation device for hydrogen recovery according to claim 6, characterized in that: The output end of the flow sensor (7) is electrically connected to the input end of the electric push rod (105) via the single chip microcomputer. When the mixed gas intake volume is less than a preset value, the ball plug (8) is started to rotate, so that the mixed gas and desalted water are introduced into the small alcohol washing tower (12) in a unidirectional manner.

8. The hydrogen separation device for hydrogen recovery according to claim 1, characterized in that: The heater (3) comprises a heating tank (31), wherein a heating rod (34) is fixedly mounted at the bottom end of the interior of the heating tank (31), a spiral tube (32) is arranged inside the heating tank (31), and the heating rod (34) passes through the spiral center of the spiral tube (32), and a rotating fan (33) is mounted at the top end of the interior of the heating tank (31).

9. A hydrogen separation device for hydrogen recovery according to claim 8, characterized in that: The air inlet end of the spiral tube (32) is located at the top, and the air outlet end is located at the bottom; the inner diameter of the upper half of the spiral tube (32) is smaller than the inner diameter of the lower half.

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