Hydrogen separation, recovery and purification device and purification method

Abstract

The invention discloses a hydrogen separation, recovery and purification device and a purification method, and particularly relates to hydrogen separation equipment, the hydrogen separation equipment comprises a shell, the shell is internally provided with a first extraction opening, a second extraction opening, a third extraction opening and a fourth extraction opening, a first separation membrane is arranged on the first separation bin; the second separation bin is fixedly communicated with the first separation bin, the second separation bin comprises a plurality of water drop channels which are sequentially communicated, each water drop channel comprises a bent channel and an inclined channel which is symmetrical to the bent channel, and a second separation membrane is arranged on each bent channel. According to the invention, after compressed gas is introduced into the first separation bin and hydrogen permeates along the first separation membrane, the pressure in the first separation bin is reduced, and then the gas is separated along the two inclined channels and is intersected at the communication point of the water drop channel, so that the resistance of the output gas of the bent channel is increased, and the pressure of the bent channel part is increased; therefore, the hydrogen separation efficiency of the second separation membrane is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen separation, and in particular to a hydrogen separation, recovery and purification device and a purification method. Background Art

[0002] Hydrogen is widely used as a clean energy in the chemical industry, food, semiconductor and other industries. After production, hydrogen needs to be purified to separate excess gas and impurities before subsequent use.

[0003] According to patent number CN112919411A, publication (announcement) date: 2021-06-08, a membrane separator with heating and hydrogen separation functions is disclosed, the membrane separator mainly includes an explosion-proof chamber, a first flange, a second flange, a heating chamber, a hydrogen separation chamber and a hydrogen collection chamber, the explosion-proof chamber is provided with heating device terminals and thermocouple terminals, the heating chamber is provided with electric heating devices and evenly distributed semicircular support tube sheets arranged in an upper and lower staggered manner, and the hydrogen separation chamber is provided with palladium and its alloy composite membrane tubes. When used in conjunction with low-temperature methanol steam reforming hydrogen production equipment, the membrane separator is heated to the operating temperature by mains electricity, and then the hydrogen-rich reforming gas is connected to realize the processes of palladium membrane preheating, reforming gas heating and hydrogen separation. The special structural design of the membrane separator reduces the heat loss of the electric heating device, reduces the operating energy consumption of the hydrogen separation system, improves the heat utilization efficiency, and makes the structure more compact.

[0004] Among the existing technologies including the above-mentioned patents, membrane separation is one of the commonly used means for hydrogen purification. By taking advantage of the characteristic that hydrogen can quickly pass through the metal palladium membrane, the hydrogen in the gas is separated from the rest of the gas through the pressure difference at both ends of the palladium membrane. The gas to be separated will be pressurized and input into the inlet of the membrane separator. However, as the hydrogen is continuously separated from the metal palladium membrane, the internal gas pressure will become lower and lower, resulting in the low-pressure gas at the outlet of the membrane separator still containing considerable hydrogen, causing the loss of hydrogen in the purified overload. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydrogen separation, recovery and purification device and purification method, which aims to solve the problem that after the membrane separator continuously separates hydrogen, the gas pressure will decrease, resulting in hydrogen loss.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a hydrogen separation, recovery and purification device, comprising a shell, wherein the shell is respectively provided with:

[0007] a first gas extraction port, which is used to discharge the separated hydrogen;

[0008] a first separation chamber, on which a first separation membrane is disposed;

[0009] a second separation chamber, which is fixedly connected to the first separation chamber, and comprises a plurality of water drip channels connected in sequence, wherein the water drip channels comprise curved channels and inclined channels symmetrically arranged above the curved channels, and a second separation membrane is arranged on the curved channels;

[0010] The compressed gas is released from the first separation chamber and then separated along the two inclined paths, and meets at the connection point of the water drop channel.

[0011] Preferably, the second separation bin is assembled at the following two stations:

[0012] First station: multiple water drop channel axes are arranged vertically, so that the air flow flows out along the multiple zigzag inclined channels;

[0013] Second workstation: the axes of the plurality of water droplet channels are arranged obliquely, so that the airflow flows out along the plurality of inclined channels tending to be vertical.

[0014] Preferably, the connecting points of adjacent water drop channels are symmetrically provided with bent elastic parts, and a pulling rod is provided on the middle section of the water drop channel. The pulling rod moves as the pressure at the connecting point increases to drive the second separation bin to switch positions.

[0015] Preferably, the connection point is provided with a pressure bag, the first end of the pulling rod is slidably connected to a fixing sleeve, an elastic inflatable part is provided between the two, and the elastic inflatable part is fixedly connected to the pressure bag through a connecting tube.

[0016] Preferably, an insulating filling block is provided in the shell, and an air extraction chamber for supporting the second separation chamber is opened in the insulating filling block. A second air extraction port is provided on the shell, and the second air extraction port is fixedly connected to the air extraction chamber, and the air extraction chamber is provided with a second connecting pipe facing the first air extraction port.

[0017] Preferably, the second air extraction port is closed when the second separation chamber is switched to the first working position, and is opened when the second separation chamber is switched to the second working position.

[0018] Preferably, an isolation plate and a partition plate are provided in the gas extraction chamber to guide the gas separated in the second separation chamber to flow upward along the isolation plate to the second gas extraction port or the first gas extraction port.

[0019] Preferably, a drainage cover is provided on the curved path of the water drop channel, and the airflow flows along the outer wall of the drainage cover to draw the airflow between the curved path and the drainage cover.

[0020] Preferably, a sliding blocking plate is movably provided on the second air extraction port, a first elastic member is provided between the sliding blocking plate and the second separation chamber, and the second separation chamber is deformed and switched to drive the first elastic member to pull the sliding blocking plate to move.

[0021] A method for separating, recovering and purifying hydrogen, comprising the hydrogen separation, recovery and purification device of the above scheme, specifically comprising the following steps:

[0022] S01. The raw gas is compressed by a compressor and then enters the gas-liquid separation tank and the gas-liquid separator in sequence to preliminarily remove the liquid in the compressed gas;

[0023] S02, after the initial removal of liquid, the gas enters the pre-membrane coalescer, where liquid impurities and moisture in the compressed gas are removed for a second time;

[0024] S03, heating the gas after fine separation of the liquid, and then entering the shell to be separated through the first separation chamber and the second separation chamber to obtain hydrogen and residual gas;

[0025] S04, hydrogen and residual gas are all cooled. The cooled hydrogen enters the buffer tube and is compressed again to obtain purified hydrogen. The cooled residual gas is pumped into the collection tank.

[0026] In the above technical solution, the present invention provides a hydrogen separation, recovery and purification device and purification method, which have the following beneficial effects: after the compressed gas enters the first separation chamber, as the hydrogen passes through the first separation membrane, the pressure in the first separation chamber will decrease accordingly, and then the gas will separate along two inclined paths and intersect at the connection point of the water droplet channel to increase the resistance of the gas output in the curved path, thereby increasing the pressure of the curved path part, so that the efficiency of hydrogen separation by the second separation membrane is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of an explosion inside a housing provided by an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0031] Figure 4An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0032] Figure 5 for Figure 4 Enlarged schematic diagram at point C in the middle;

[0033] Figure 6 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0034] Figure 7 An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0035] Figure 8 An overall explosion diagram provided for an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the purification pipeline provided by an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Shell; 10. Inspection port; 101. Embedded door panel; 11. Air inlet; 12. First air extraction port; 13. Second air extraction port; 21. First separation chamber; 210. First separation membrane; 31. Insulation filling block; 310. Air extraction chamber; 311. Docking port; 312. First connecting pipe; 313. Second connecting pipe; 32. Blocking filling block; 4. Second separation chamber; 401. Connecting port; 402. Air outlet; 403. Elastic bending portion ; 41. Inclined channel; 42. Curved channel; 421. Sealing port; 422. Curved port; 43. Second separation membrane; 431. Deformable elastic part; 44. Drainage cover; 45. Sealing plate; 46. Isolation plate; 461. Partition plate; 51. Sliding plate; 52. First elastic part; 53. Second elastic part; 60. Pressure bag; 61. Air connecting pipe; 611. Elastic inflatable part; 612. Third elastic part; 62. Pull rod; 621. Fixed sleeve. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] Example 1

[0041] like Figure 1-8 As shown, a hydrogen separation, recovery and purification device includes a shell 1, and the shell 1 is provided with:

[0042] a first gas extraction port 12, which is used to discharge the separated hydrogen;

[0043] A first separation chamber 21 having a first separation membrane 210 disposed thereon;

[0044] The second separation chamber 4 is fixedly connected to the first separation chamber 21 and includes a plurality of water drop channels connected in sequence. The water drop channels include a curved channel 42 and an inclined channel 41 symmetrically arranged along the curved channel 42. A second separation membrane 43 is provided on the curved channel 42.

[0045] The compressed gas is released along the first separation chamber 21 and then separated along the two inclined paths 41 , and meets at the connection point of the water drop channel.

[0046] Specifically, a curved port 422 is provided on the curved channel 42, a second separation membrane 43 is provided on the curved port 422, a first air extraction port 12 is provided on the side wall of the shell 1, an air inlet 11 is provided on the top of the shell 1, the air inlet 11 is fixedly connected to the first separation chamber 21, adjacent water drop channels are staggered so that the axes of the inclined channels 41 in the two adjacent water drop channels coincide, a connecting port 401 is provided on the top of the second separation chamber 4 and an air outlet 402 is provided on the bottom. When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11. At this time, due to the different pressures on both sides of the first separation membrane 210, the hydrogen will pass through the first separation membrane 210 and be extracted by the first air extraction port 12, which will cause The pressure of the compressed gas decreases, and then the gas is discharged from the first separation chamber 21 and enters the second separation chamber 4 along the connecting port 401. At this time, the gas will be separated by two inclined channels 41, one of which flows to the adjacent water drop channel, and the other inclined channel 41 will input the gas into the curved channel 42 and flow along the curved channel 42 to one of the inclined channels 41, so that the gas intersects at the connection point of the water drop channel, thereby providing resistance and limiting the flow rate of the airflow. When the subsequent gas continues to be input, the pressure of the curved channel 42 increases due to the restriction, which increases the filtration efficiency of the second separation membrane 43 on the curved channel 42, reduces the amount of hydrogen lost with the residual gas, and the subsequent airflow is discharged along the outlet 402 for collection.

[0047] In the above technical solution, after the compressed gas enters the first separation chamber 21, the pressure in the first separation chamber 21 will decrease as the hydrogen passes through the first separation membrane 210. The gas is then separated along the two inclined paths 41 and converges at the connection point of the water droplet channel to increase the resistance to the gas output of the curved path 42, thereby increasing the pressure of the curved path 42, so that the efficiency of separating hydrogen by the second separation membrane 43 is improved.

[0048] As an embodiment provided by the present invention, the second separation bin 4 is assembled at the following two stations:

[0049] First station: multiple water droplet channels are arranged with their axes vertically, so that the airflow flows out along multiple zigzag inclined channels 41;

[0050] Second station: multiple water droplet channels are arranged with their axes tilted so that the airflow flows out along multiple inclined channels 41 that tend to be vertical.

[0051] Specifically, the second separation membrane 43 is a metal palladium membrane, which is a mechanical membrane and has limited pressure resistance. As the hydrogen is continuously separated by the second separation membrane 43 in the second separation chamber 4, the residual gas inside will accumulate, causing the pressure to increase continuously, which may damage the metal palladium membrane. The second separation chamber 4 has two stations. When the pressure in the second separation chamber 4 is normal, the second separation chamber 4 is in the first station, that is, the axes of the multiple water droplet channels are arranged vertically, and the multiple inclined channels 41 are arranged in a zigzag manner (such as Figure 4 As shown), the airflow will be guided by the curved channel 42 to counter-charge, limit the flow, and increase the airflow pressure. When the pressure is too high, the second separation chamber 4 switches to the second station. At this time, the axes of multiple water droplet channels are arranged along an inclination. At this time, the tortuous inclined channel 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the impact of the curved channel 42 on the counter-charge. At the same time, the outflow direction of the airflow of the curved channel 42 will also be inclined toward the outlet direction, so that the flow limiting effect is weakened, thereby reducing the pressure and performing overload protection on the second separation membrane 43.

[0052] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation, and then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 in the first workstation. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water droplet channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water droplet channel, limiting the flow rate of the airflow. When the subsequent gas is continuously input, the pressure of the curved path 42 increases, and the filtered airflow in the second separation chamber 4 is discharged along the air outlet 402 for collection. When the pressure is too high, the axes of multiple water droplet channels are arranged along an inclination. At this time, the tortuous inclined path 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow limiting effect of the curved path 42 and perform overload protection.

[0053] As an embodiment provided by the present invention, the connecting points of adjacent water drop channels are symmetrically provided with bent elastic portions 403. A pulling rod 62 is provided on the middle section of the water drop channel. The pulling rod 62 moves as the pressure at the connecting point increases to drive the second separation chamber 4 to switch positions.

[0054] A pressure bag 60 is provided at the connection point, and a first end of the pulling rod 62 is slidably connected to a fixing sleeve 621 , with an elastic inflatable portion 611 provided therebetween. The elastic inflatable portion 611 is fixedly connected to the pressure bag 60 through the connecting tube 61 .

[0055] Specifically, the bending elastic portion 403 provides the second separation chamber 4 with freedom to bend when switching positions. The number of water drop channels is three. The pulling rod 62 is slidably connected to the water drop channel in the middle section. The pressure bag 60 is set at the connection point (such as Figure 4 As shown in the figure, when the pressure in the second separation chamber 4 increases, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, and the fixed sleeve 621 is provided with a third elastic member 612 connected to the pulling rod 62, so that the elastic inflatable part 611 overcomes the pressure of the third elastic member 612 and causes the pulling rod 62 to slide, thereby pulling the second separation chamber 4 to switch the second separation chamber 4 to the second station, and when the pressure is released by the second separation chamber 4 at the second station, it will return to the first station, thereby maintaining the maximum pressure while protecting the second separation membrane 43, thereby increasing the separation efficiency.

[0056] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation. Then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 at the first station. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water drop channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water drop channel, limiting The flow rate of the air flow causes the pressure of the curved channel 42 to increase when subsequent gas is continuously input. The filtered air flow in the second separation chamber 4 is discharged along the air outlet 402 for collection. When the pressure is too high, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, driving the pulling rod 62 to slide and pull the second separation chamber 4. The axes of multiple water droplet channels are arranged at an angle. At this time, the tortuous inclined channel 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow limiting effect of the curved channel 42 and perform overload protection.

[0057] As an embodiment provided by the present invention, an insulating filling block 31 is provided in the shell 1, and an air extraction chamber 310 for supporting the second separation chamber 4 is opened in the insulating filling block 31. A second air extraction port 13 is provided on the shell 1, and the second air extraction port 13 is fixedly connected to the air extraction chamber 310. The air extraction chamber 310 is provided with a second connecting pipe 313 facing the first air extraction port 12.

[0058] Specifically, an insulating filling block 31 is provided in the shell 1. The insulating filling block 31 is used to carry the second separation chamber 4 and limit the space in the shell 1 to insulate the gas to ensure the normal operation of the separation membrane. An inspection port 10 is provided on the shell 1. An embedded door panel 101 is provided on the inspection port 10. A sealing filling block 32 is provided on the embedded door panel 101 to seal the insulating filling block 31. A docking port 311 is provided on the insulating filling block 31. The docking port 311 faces the second air extraction port 13. A second connecting pipe 313 is provided on the insulating filling block 31. The insulating filling block 31 is connected to the air extraction chamber 310 separated by the second separation chamber 4. The second air extraction port 13 is used to suck the hydrogen separated by the second separation chamber 4 to maintain the pressure difference between the second separation chamber 4 and the air extraction chamber 310.

[0059] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation. Then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 at the first station. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water drop channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water drop channel, limiting the flow rate of the airflow. When the gas is continuously input, the pressure of the curved channel 42 increases, and the filtered airflow in the second separation chamber 4 is discharged along the air outlet 402 for collection, and the separated hydrogen is sucked by the second connecting pipe 313. When the pressure is too high, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, driving the pulling rod 62 to slide and pull the second separation chamber 4. The axes of multiple water droplet channels are arranged at an angle. At this time, the tortuous inclined channel 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow limiting effect of the curved channel 42 and perform overload protection.

[0060] As an embodiment provided by the present invention, the second air extraction port 13 is closed when the second separation chamber 4 is switched to the first working position, and is opened when the second separation chamber 4 is switched to the second working position.

[0061] Specifically, a first connecting pipe 312 is provided on the insulation filling block 31, and the first connecting pipe 312 connects the second gas pumping port 13 and the first gas pumping port 12. When the second separation chamber 4 is in the first working position, the second gas pumping port 13 is in a closed state. At this time, the hydrogen separated from the first separation chamber 21 and the second separation chamber 4 is sucked by the first gas pumping port 12. When the second separation chamber 4 is switched to the second working position, the pressure in the second separation chamber 4 will decrease. At this time, the second gas pumping port 13 is opened to pump air into the gas pumping chamber 310 to reduce the pressure in the gas pumping chamber 310, thereby maintaining the pressure difference between the second separation chamber 4 and the gas pumping chamber 310.

[0062] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation. Then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 in the first station. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water drop channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water drop channel, limiting the flow rate of the airflow. When the subsequent gas is continuously input, the pressure of the curved path 42 increases. In addition, the filtered air flow in the second separation chamber 4 is discharged along the air outlet 402 for collection. When the pressure is too high, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, driving the pulling rod 62 to slide and pull the second separation chamber 4. The axes of multiple water droplet channels are arranged inclined. At this time, the tortuous inclined path 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow limiting effect of the curved path 42 and perform overload protection. At the same time, the second air pumping port 13 is opened to pump air into the air pumping chamber 310 to reduce the pressure in the air pumping chamber 310, and the separated hydrogen is sucked into the second connecting pipe 313.

[0063] As an embodiment provided by the present invention, an isolation plate 46 and a partition plate 461 are provided in the gas extraction chamber 310 to guide the gas separated in the second separation chamber 4 to flow upward along the isolation plate 46 to the second gas extraction port 13 or the first gas extraction port 12;

[0064] A flow guide cover 44 is provided on the curved channel 42 of the water drop channel. The airflow flows along the outer wall of the flow guide cover 44 to draw the airflow between the curved channel 42 and the flow guide cover 44 .

[0065] Specifically, an isolation plate 46 and a partition plate 461 are provided in the vacuum chamber 310. The isolation plate 46, the partition plate 461 and the vacuum chamber 310 are clamped to form a guide channel. Regardless of whether the second separation chamber 4 is in the first workstation or the second workstation, the hydrogen separated by the second separation chamber 4 flows along the guide channel. When the second separation chamber 4 is in the second workstation, the second vacuum port 13 is opened to increase the suction force, driving the hydrogen to flow along the guide channel to the second vacuum port 13 so that it can be sucked. The flowing airflow will drive the airflow between the hood 44 and the curved path 42 to reduce the air pressure and increase the pressure difference between the hood 44 and the second separation chamber 4, so as to increase the efficiency of separating hydrogen at the second workstation.

[0066] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation, and then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 in the first station. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water drop channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water drop channel, limiting the flow rate of the airflow. When the subsequent gas is continuously input, the pressure of the curved path 42 increases, and the filtered airflow in the second separation chamber 4 flows along the air outlet 4 02 is discharged for collection. When the pressure is too high, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, driving the pulling rod 62 to slide and pull the second separation chamber 4. The axes of multiple water droplet channels are arranged along an inclination. At this time, the tortuous inclined path 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow-limiting effect of the curved path 42 and perform overload protection. At the same time, the second air pumping port 13 is opened to pump air into the air pumping chamber 310 to reduce the pressure in the air pumping chamber 310, and the separated hydrogen flows along the guide channel and is sucked by the second connecting pipe 313. At the same time, the flowing airflow will drive the airflow between the drainage hood 44 and the curved path 42 to reduce the air pressure.

[0067] As an embodiment provided by the present invention, a sliding blocking plate 51 is movably provided on the second air exhaust port 13, and a first elastic member 52 is provided between the sliding blocking plate 51 and the second separation chamber 4. The second separation chamber 4 deforms and switches the working position to drive the first elastic member 52 to pull the sliding blocking plate 51 to move.

[0068] Specifically, a second elastic member 53 is provided between the sliding blocking plate 51 and the shell 1, a deformable elastic portion 431 is provided on the isolation plate 46, and the first elastic member 52 passes through the deformable elastic portion 431. When the second separation bin 4 is deformed to switch positions, the first elastic member 52 overcomes the pulling force of the deformable elastic portion 431 and the second elastic member 53 to pull the sliding blocking plate 51, thereby opening the sliding blocking plate 51.

[0069] As the best embodiment provided by the present invention, a sealing opening 421 is opened on the second separation chamber 4 , and a sealing plate 45 is slidably connected to the sealing opening 421 .

[0070] Specifically, the sealing ports 421 are opened at both ends of the curved channel 42 to intercept the second separation membrane 43 on the curved channel 42, so as to select the opening number of the water droplet channel as needed to control the pressure accumulation speed and pressure size in the second separation chamber 4, and during maintenance, the water droplet channel is blocked by the sealing plate 45 to facilitate the disassembly of the second separation membrane 43 for maintenance.

[0071] When hydrogen is separated, the hydrogen is compressed and then input into the first separation chamber 21 along the air inlet 11 for separation, and then the gas is discharged from the first separation chamber 21. At this time, the airflow enters the second separation chamber 4 in the first station. At this time, the gas will be separated by two inclined paths 41, one of which flows to the adjacent water drop channel, and the other inclined path 41 will input the gas into the curved path 42 and flow along the curved path 42 to one of the inclined paths 41, so that the gas intersects at the connection point of the water drop channel, limiting the flow rate of the airflow. When the subsequent gas is continuously input, the pressure of the curved path 42 increases, and the filtered airflow in the second separation chamber 4 flows along the air outlet 4 02 is discharged for collection. When the pressure is too high, the pressure bag 60 will press the internal gas into the elastic inflatable part 611 as the pressure increases, driving the pulling rod 62 to slide and pull the second separation chamber 4. The axes of multiple water droplet channels are arranged along an inclination. At this time, the tortuous inclined path 41 will tend to be vertical as the water droplet channel inclines, so as to reduce the flow-limiting effect of the curved path 42 and perform overload protection. At the same time, the second air pumping port 13 is opened to pump air into the air pumping chamber 310 to reduce the pressure in the air pumping chamber 310, and the separated hydrogen flows along the guide channel and is sucked by the second connecting pipe 313. At the same time, the flowing airflow will drive the airflow between the drainage hood 44 and the curved path 42 to reduce the air pressure.

[0072] Example 2

[0073] like Figure 9 As shown, a method for separating, recovering and purifying hydrogen comprises the following steps:

[0074] S01. The raw gas is compressed by the raw gas compressor to 1.4-3.45 MPa. After compression, it enters the raw gas-liquid separation tank and the raw gas-liquid separator in sequence to preliminarily remove the liquid in the compressed gas;

[0075] S02, after the initial removal of liquid, the gas enters the pre-membrane coalescer, where liquid impurities and moisture in the compressed gas are removed for a second time;

[0076] S03, the gas after fine separation of liquid is heated, and after heating, enters the shell 1 and is separated through the first separation chamber 21 and the second separation chamber 4 to obtain hydrogen and residual gas;

[0077] S04, hydrogen and residual gas are all cooled. The cooled hydrogen enters the buffer tube and is compressed again to obtain purified hydrogen. The cooled residual gas is pumped into the residual gas collection tank.

[0078] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A hydrogen separation, recovery and purification device, characterized in that: The invention comprises a housing (1), wherein the housing (1) is provided with: a first gas extraction port (12), which is used to discharge the separated hydrogen; A first separation chamber (21) on which a first separation membrane (210) is disposed; a second separation chamber (4), which is fixedly connected to the first separation chamber (21), the second separation chamber (4) comprising a plurality of water drop channels connected in sequence, the water drop channels comprising a curved channel (42) and an inclined channel (41) symmetrically arranged with respect to the curved channel (42), and a second separation membrane (43) being arranged on the curved channel (42); The compressed gas is released from pressure along the first separation chamber (21), and then separated along the two inclined paths (41), and converges at the connection point of the water drop channel.

2. A hydrogen separation, recovery and purification device according to claim 1, characterized in that: The second separation bin (4) is assembled at the following two stations: First station: the axes of the plurality of water drop channels are arranged vertically, so that the airflow flows out along the plurality of meandering inclined channels (41); Second workstation: the axes of the plurality of water drop channels are arranged to be inclined so that the airflow flows out along the plurality of inclined channels (41) tending to be vertical.

3. A hydrogen separation, recovery and purification device according to claim 2, characterized in that: The connecting points of adjacent water drop channels are symmetrically provided with bent elastic parts (403), and a pulling rod (62) is provided on the middle section of the water drop channel. The pulling rod (62) moves as the pressure at the connecting point increases to drive the second separation bin (4) to switch positions.

4. A hydrogen separation, recovery and purification device according to claim 3, characterized in that: The connection point is provided with a pressure bag (60), the first end of the pulling rod (62) is slidably connected to a fixing sleeve (621), an elastic inflatable part (611) is provided between the two, and the elastic inflatable part (611) is fixedly connected to the pressure bag (60) through a connecting tube (61).

5. A hydrogen separation, recovery and purification device according to claim 2, characterized in that: The shell (1) is provided with a heat-insulating filling block (31), and a vacuum chamber (310) for carrying the second separation chamber (4) is provided in the heat-insulating filling block (31). The shell (1) is provided with a second vacuum port (13), and the second vacuum port (13) is fixedly connected to the vacuum chamber (310). The vacuum chamber (310) is provided with a second connecting pipe (313) facing the first vacuum port (12).

6. A hydrogen separation, recovery and purification device according to claim 5, characterized in that: The second air extraction port (13) is closed when the second separation bin (4) is switched to the first working position, and is opened when the second separation bin (4) is switched to the second working position.

7. A hydrogen separation, recovery and purification device according to claim 6, characterized in that: An isolation plate (46) and a partition plate (461) are arranged in the gas extraction chamber (310) to guide the gas separated in the second separation chamber (4) to flow upward along the isolation plate (46) toward the second gas extraction port (13) or the first gas extraction port (12).

8. A hydrogen separation, recovery and purification device according to claim 7, characterized in that: A flow guide cover (44) is provided on the curved channel (42) of the water drop channel, and the airflow flows along the outer wall of the flow guide cover (44) to draw the airflow between the curved channel (42) and the flow guide cover (44).

9. A hydrogen separation, recovery and purification device according to claim 6, characterized in that: A sliding blocking plate (51) is movably arranged on the second air suction port (13), a first elastic member (52) is arranged between the sliding blocking plate (51) and the second separation chamber (4), and the second separation chamber (4) is deformed to switch positions to drive the first elastic member (52) to pull the sliding blocking plate (51) to move.

10. A method for separating, recovering and purifying hydrogen, characterized in that: The hydrogen separation, recovery and purification device according to any one of claims 1 to 9 comprises the following steps: S01. The raw gas is compressed by a compressor, and then enters the gas-liquid separation tank and the gas-liquid separator in sequence to preliminarily remove the liquid in the compressed gas; S02, the gas after the initial removal of liquid enters the pre-membrane coalescer, and the liquid impurities and moisture in the compressed gas are removed for a second time; S03, heating the gas after the fine separation of the liquid, and after heating, entering the shell and passing through the first separation chamber (21) and the second separation chamber (4) for separation to obtain hydrogen and residual gas; S04, hydrogen and residual gas are all cooled. The cooled hydrogen enters the buffer tube and is compressed again to obtain purified hydrogen. The cooled residual gas is pumped into a collection tank.

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