A hydrogen production and purification system and hydrogen production equipment

Abstract

The present application relates to a hydrogen production and purification system and hydrogen production equipment thereof, and relates to the technical field of hydrogen production equipment. The hydrogen production and purification system includes a main air inlet pipe, one end of which is sequentially connected to a first deoxygenation tank, a first coarse separator, a first drying tank, and a main air outlet pipe; the first coarse separator includes a cyclone separator, and a cooling component is provided on the cyclone separator; the cyclone separator is respectively connected to a fluid discharge pipe, a gas discharge pipe, and a liquid discharge pipe, the fluid discharge pipe is interconnected with the first deoxygenation tank, and the gas discharge pipe is interconnected with the first drying tank. The present application sets a first coarse separator before the first drying tank, so that a portion of the water in the hydrogen is removed before entering the first drying tank. Therefore, the first drying tank needs to absorb less water, thereby reducing the frequency of shutdown of the first drying tank for maintenance, which can reduce the impact on the working efficiency of the hydrogen purification system.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production equipment, and in particular to a hydrogen production and purification system and hydrogen production equipment thereof. Background Art

[0002] Currently, hydrogen holds great promise as a clean and efficient energy carrier. There are many common methods for producing hydrogen, including but not limited to the following: steam reforming, which heats high-carbon hydrocarbons with water vapor to produce hydrogen and some byproducts. Partial oxidation, which mixes low-carbon hydrocarbons such as natural gas with oxygen and reacts over a catalyst to produce hydrogen and some byproducts. Electrolysis, which uses electrolysis to decompose water into oxygen and hydrogen. Photolysis, which uses light energy to decompose water into oxygen and hydrogen.

[0003] Currently, hydrogen production from pure water electrolysis is the mainstream technology for large-scale hydrogen production facilities. However, the hydrogen produced by this technology contains a certain amount of oxygen and water. Depending on the pressure and temperature during the production process, the oxygen and water content varies. The presence of oxygen and water restricts the direct use of hydrogen.

[0004] Based on this problem, a purification system is usually set up after the hydrogen production equipment. The purification system generally includes gas-water separators, deoxygenators, hydrogen dryers, hydrogen coolers, filters, water collectors and other equipment and various valves, pipelines, as well as on-site instruments and primary instruments for detection and control.

[0005] Common hydrogen dryers often use adsorbents to absorb moisture from hydrogen. However, once the adsorbent becomes saturated, it needs to be replaced with a new one. During this process, the hydrogen dryer is no longer suitable for operation. This causes the entire hydrogen purification system to be suspended, which affects the efficiency of the entire hydrogen purification system. Summary of the Invention

[0006] The present application provides a hydrogen production and purification system and hydrogen production equipment thereof, the purpose of which is to realize the hydrogen purification process and improve the working efficiency of the hydrogen purification system.

[0007] In a first aspect, the present application provides a hydrogen production and purification system adopting the following technical solution: a hydrogen production and purification system comprising a main air inlet pipe, one end of which is sequentially connected to a first deoxidation tank, a first coarse separator, a first drying tank, and a main air outlet pipe;

[0008] The first coarse separator includes a cyclone separator, and the cyclone separator is provided with a cooling component;

[0009] The cyclone separator is connected to a fluid discharge pipe, a gas discharge pipe and a liquid discharge pipe respectively. The fluid discharge pipe is connected to the first deoxidation tank, and the gas discharge pipe is connected to the first drying tank.

[0010] By adopting the above technical solution, the main air inlet pipe, the first deoxidation tank, the first coarse separator, the first drying tank and the main air outlet pipe are arranged, and hydrogen is passed into the first deoxidation tank through the main air inlet pipe, which can remove oxygen from the hydrogen, but the water content in the hydrogen will increase. The hydrogen in the first deoxidation tank is then passed into the first coarse separator and the first enhanced separator in sequence, and most of the water in the hydrogen is removed by physical means. Finally, the hydrogen passes through the first drying tank, which absorbs the last small amount of water and then discharges the hydrogen into the main air outlet pipe. At this time, the purity of the hydrogen in the main air outlet pipe is greatly improved.

[0011] Since the first coarse separator adopts a cyclone separator, it can separate gas from liquid droplets, and the setting of the cooling component can reduce the internal ambient temperature of the cyclone separator, so that the hydrogen contacts the cold side wall of the cyclone separator, and water vapor will condense and precipitate. At this time, liquid droplets are precipitated inside the hydrogen, so the water in the hydrogen can be separated by the first coarse separator.

[0012] By installing the first coarse separator before the first drying tank, some water is removed from the hydrogen before it enters the first drying tank. As a result, the first drying tank needs to absorb less water, which reduces the frequency of downtime for maintenance of the first drying tank and reduces the impact on the operating efficiency of the hydrogen purification system.

[0013] Optionally, a closing assembly is provided in the cyclone separator, the closing assembly includes a mounting seat, a side wall of the mounting seat is spaced apart from an inner wall of the cyclone separator, and the mounting seat is spaced apart from the liquid discharge pipe along the axial direction of the liquid discharge pipe;

[0014] A closing block is provided on a side of the mounting seat facing the liquid discharge pipe. The closing block is plugged into and matched with the liquid discharge pipe along the axial direction of the liquid discharge pipe. When the closing block is inserted into the liquid discharge pipe, the closing block closes the liquid discharge pipe.

[0015] A closing driving member capable of driving the closing block to move toward the liquid discharge pipe is provided between the closing block and the mounting seat.

[0016] By adopting the above technical solution, the sealing assembly includes a mounting seat positioned at one end of the liquid discharge pipe, a sealing block disposed between the mounting seat and the end of the liquid discharge pipe, and a sealing drive disposed between the sealing block and the mounting seat. Thus, driven by the sealing drive, the sealing block can be inserted into the liquid discharge pipe along the axial direction, thereby sealing the liquid discharge pipe and preventing hydrogen from escaping from the cyclone separator. Furthermore, when drainage is required, the sealing block can be simply removed from the liquid discharge pipe, and water will automatically drain from the pipe.

[0017] Optionally, one end of the liquid discharge pipe away from the closing component is connected to a liquid storage tank, and the liquid storage tank is sleeved on the outside of the liquid discharge pipe; the liquid storage tank and the liquid discharge pipe are detachably connected.

[0018] By adopting this technical solution, the liquid storage tank and the liquid discharge pipe are interconnected. On the one hand, the liquid storage tank can seal the liquid discharge pipe, preventing hydrogen from escaping from the cyclone separator. On the other hand, the liquid storage tank can collect water discharged from the liquid discharge pipe. The detachable connection between the liquid storage tank and the liquid discharge pipe facilitates the emptying of the water in the liquid storage tank.

[0019] Optionally, an outer wall of the liquid storage tank is penetrated with a jacking hole, a jacking rod is inserted into the jacking hole, the jacking rod is coaxially arranged with the liquid discharge pipe, and the jacking rod is connected to the inner wall of the jacking hole by a thread;

[0020] The closed driving member includes a plurality of driving springs. The length direction of the driving springs is arranged along the axial direction of the liquid discharge pipe. The two ends of the driving springs are respectively connected to the mounting seat and the closing block.

[0021] By adopting the above technical solution, a jacking hole is opened on the liquid storage tank, and a jacking rod is inserted into the jacking hole. By twisting the jacking rod, the liquid discharge pipe can move in the axial direction.

[0022] Since the driving closure member adopts a driving spring, the driving spring can realize the closing and opening of the liquid discharge pipe by the closing block, and after the lifting rod is installed to the liquid storage tank, the lifting rod can realize the opening of the closing block.

[0023] Optionally, the liquid storage tank is respectively connected to a nitrogen supply pipe and a nitrogen exhaust pipe; and a heating component is provided in the liquid storage tank.

[0024] By adopting the above technical solution, the cooperation of the nitrogen supply pipe and the nitrogen exhaust pipe can be used to introduce nitrogen into the liquid storage tank and discharge the gas in the liquid storage tank. The heating component is installed in the liquid storage tank. Therefore, the heating component can vaporize the water in the liquid storage tank, turning the water into water vapor. The water vapor will then be carried by the nitrogen, and the water in the liquid storage tank can be automatically discharged, so that the liquid storage tank does not need to be disassembled.

[0025] Optionally, a water absorbing layer is provided in the liquid storage tank.

[0026] By adopting the above technical solution, the water-absorbing layer can absorb the water in the liquid storage tank and prevent the water from flowing in the liquid storage tank.

[0027] Optionally, a second deoxidation tank is provided on one side of the first deoxidation tank;

[0028] The main air intake pipe is connected to a first branch pipe and a second branch pipe respectively, the first branch pipe is connected to the first deaerator, the second branch pipe is connected to the second deaerator, a first control valve is provided on the first branch pipe, and a second control valve is provided on the second branch pipe;

[0029] The first deaerator is connected to a third branch pipe, the second deaerator is connected to a fourth branch pipe, a first intermediate pipe is provided between the first deaerator and the first coarse separator, the first intermediate pipe is connected to the first coarse separator, the third branch pipe and the fourth branch pipe are both connected to the first intermediate pipe, and one end of the first intermediate pipe is connected to the first coarse separator;

[0030] The third branch pipe is provided with a third control valve, and the fourth branch pipe is provided with a fourth control valve.

[0031] By adopting the above technical solution, since the second deoxygenation tank is provided on one side of the first deoxygenation tank, and the first deoxygenation tank is connected between the main air intake pipe and the first coarse separator through the first branch pipe and the third branch pipe, and the second deoxygenation tank is connected between the main air intake pipe and the first coarse separator through the second branch pipe and the fourth branch pipe, and the first control valve is provided on the first branch pipe, the second control valve is provided on the second branch pipe, the third control valve is provided on the third branch pipe, and the fourth control valve is provided on the fourth branch pipe.

[0032] When the first control valve and the third control valve are opened, the first deoxidation tank is connected to the hydrogen production and purification system; similarly, when the second control valve and the fourth control valve are opened, the second deoxidation tank is connected to the hydrogen production and purification system;

[0033] Therefore, when the first deoxidation tank is damaged or needs maintenance, the second deoxidation tank can be connected and the first deoxidation tank can be disconnected. At this time, the hydrogen production and purification system works normally and the first deoxidation tank can be maintained.

[0034] Optionally, the first branch pipe is connected to a fifth branch pipe, the connection point between the fifth branch pipe and the first branch pipe is located between the first control valve and the first deaerator, and the fifth branch pipe is connected to the first intermediate pipe;

[0035] The second branch pipe is connected to a sixth branch pipe, the connection point between the sixth branch pipe and the second branch pipe is located between the second control valve and the second deaerator, and the sixth branch pipe is connected to the first intermediate pipe;

[0036] The fifth branch pipe is provided with a fifth control valve, and the sixth branch pipe is provided with a sixth control valve;

[0037] A first intermediate control valve is provided on the first intermediate pipe. The first intermediate control valve is located between the third branch pipe and the fifth branch pipe, and between the fourth branch pipe and the sixth branch pipe.

[0038] By adopting the above technical solution, the fifth branch pipe is connected to the first branch pipe and the first intermediate pipe, and the fifth branch pipe is provided with a fifth control valve. The first intermediate pipe is provided with a first intermediate control valve between the fifth branch pipe and the third branch pipe. Therefore, when the second deaerator is connected to the hydrogen production and purification system, the fifth control valve is opened, the first intermediate pipe is closed, the third control valve is opened, and the first control valve is closed. At this time, the second deaerator and the first deaerator are interconnected, and the hydrogen discharged from the second deaerator will enter the first deaerator through the fourth branch pipe and the third branch pipe. The hydrogen discharged from the first deaerator will enter the first intermediate pipe through the fifth branch pipe and then be discharged into the first coarse separator.

[0039] Similarly, the sixth branch pipe is provided to connect the first deoxidation tank and the second deoxidation tank to each other, and the hydrogen exhausted from the first deoxidation tank is discharged into the second deoxidation tank.

[0040] The fifth branch pipe and the sixth branch pipe are provided to connect the first deoxidation tank and the second deoxidation tank in series, so that the hydrogen is deoxidized twice, thereby improving the deoxidation effect of the hydrogen.

[0041] Optionally, a backflush mechanism is further included, wherein the backflush mechanism includes a backflush source, and the backflush source is interconnected with the main air intake pipe.

[0042] By adopting the above technical solution and setting up the backflush mechanism, nitrogen and other gases are blown into the main pipeline through the backflush source, thereby being able to discharge the hydrogen remaining in the main pipeline, the first deoxidation tank, the first coarse separator and the first drying tank in sequence, which is convenient for subsequent maintenance.

[0043] In the second aspect, the present application provides a hydrogen production device adopting the following technical solution:

[0044] A hydrogen production device is equipped with the above-mentioned hydrogen production and purification system.

[0045] By adopting the above technical solution and connecting the above hydrogen production purification system to the hydrogen production equipment, oxygen and water in the hydrogen can be eliminated, thereby achieving hydrogen purification.

[0046] In summary, this application includes at least one of the following beneficial technical effects:

[0047] 1. A first coarse separator is installed before the first drying tank, so that some water is removed from the hydrogen before entering the first drying tank. Therefore, the first drying tank needs to absorb less water, and the frequency of the first drying tank shutdown maintenance is reduced, which can reduce the impact on the working efficiency of the hydrogen purification system.

[0048] 2. The coordinated arrangement of the closing component and the liquid storage tank can close the cyclone separator and drain the water in the liquid storage tank without removing the liquid storage tank.

[0049] 3. The coordinated arrangement of the first deoxidation tank and the second deoxidation tank, as well as the arrangement of the piping system between the first deoxidation tank and the second deoxidation tank, enables timely switching to the second deoxidation tank when the first deoxidation tank is damaged, thereby reducing the impact on the hydrogen production and purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the overall structure of the hydrogen production and purification system of Example 1 of the present application.

[0051] Figure 2 This is a schematic diagram of the overall structure of the first deoxygenation tank in Example 1 of the present application.

[0052] Figure 3 It is a schematic cross-sectional structural diagram of the first deoxygenation tank of Example 1 of the present application.

[0053] Figure 4 It is a schematic diagram of the overall structure of the first coarse separator of Example 1 of the present application.

[0054] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the first coarse separator of Example 1 of the present application.

[0055] Figure 6 It is a schematic diagram of the overall structure of the first drying tank in Example 1 of the present application.

[0056] Figure 7 It is a schematic diagram of the overall structure of the hydrogen production and purification system of Example 2 of the present application.

[0057] Figure 8 This is a schematic diagram of the local pipeline structure between the first deoxygenation tank and the second deoxygenation tank in Example 2 of the present application.

[0058] Figure 9 It is a schematic diagram of the overall structure of the backflush mechanism of Example 2 of the present application.

[0059] In the figure, 1, main intake pipe; 11, first intermediate pipe; 111, first intermediate control valve; 12, second intermediate pipe; 13, third intermediate pipe; 131, third intermediate control valve;

[0060] 2. First deoxidation tank; 21. Deoxidation tank body; 22. Deoxidation cover plate; 23. First heating pipe; 231. First heating element; 24. Oxygen absorption layer; 25. Deoxidation inlet pipe; 26. Deoxidation outlet pipe; 27. First branch pipe; 271. First control valve; 28. Third branch pipe; 281. Third control valve; 29. ​​Fifth branch pipe; 291. Fifth control valve;

[0061] 200, second deaerator; 201, second branch pipe; 2011, second control valve; 202, fourth branch pipe; 2021, fourth control valve; 203, sixth branch pipe; 2031, sixth control valve;

[0062] 3. First coarse separator; 31. Cyclone separator; 311. Fluid discharge pipe; 312. Gas discharge pipe; 313. Liquid discharge pipe; 32. Cooling assembly; 33. Closing assembly; 331. Mounting seat; 3311. Mounting hole; 332. Closing block; 333. Closing drive member; 3331. Driving spring; 34. Liquid storage tank; 341. Ejection hole; 342. Ejection rod; 343. Nitrogen gas supply pipe; 3431. Gas supply control valve; 344. Nitrogen gas exhaust pipe; 3441. Exhaust control valve; 345. Heating assembly; 3451. Heating cavity; 3452. Heating rod; 3453. Enclosed deoxidation cover plate; 346. Water absorption layer; 347. Connecting pipe; 348. Water storage hole;

[0063] 300, second coarse separator; 301, first reinforced separator; 302, second reinforced separator;

[0064] 4. First drying tank; 41. Drying tank body; 42. Drying cover plate; 43. Second heating pipe; 431. Second heating element; 44. Adsorption layer; 45. Drying air inlet pipe; 46. Drying air outlet pipe; 400. Second drying tank;

[0065] 5. Main outlet pipe; 51. Outlet control valve;

[0066] 6. Backflush mechanism; 61. Backflush source; 62. First backflush pipe; 63. Second backflush pipe; 631. Backflush control valve; 64. Water seal; 65. Water seal pipe; 66. Water seal control valve; 67. Flame arrester. DETAILED DESCRIPTION

[0067] The following is combined with Figure 1 -Attached Figure 9 , further details of this application are given.

[0068] Example 1:

[0069] A hydrogen production and purification system, referring to Figure 1 , including a main air intake pipe 1, a first intermediate pipe 11, a second intermediate pipe 12, a third intermediate pipe 13, a main air outlet pipe 5, a first deaerator 2, a first rough separator 3, a first reinforced separator 301, and a first drying tank 4. The first deaerator 2 is interconnected with the main air intake pipe 1 and the first intermediate pipe 11 respectively. The end of the first intermediate pipe 11 away from the first deaerator 2 is interconnected with the first rough separator 3. The two ends of the second intermediate pipe 12 are interconnected with the first rough separator 3 and the first reinforced separator 301 respectively. The two ends of the second intermediate pipe 12 are interconnected with the first reinforced separator 301 and the first drying tank 4 respectively. The main air outlet pipe 5 is interconnected with the first drying tank 4.

[0070] Reference Figure 1 Hydrogen produced in the hydrogen production equipment is introduced into the main air inlet pipe 1. Since this hydrogen is produced by water electrolysis, the hydrogen in the main air inlet pipe 1 contains a small amount of residual oxygen and a relatively large amount of residual water. Passing this hydrogen into the first deoxygenation tank 2 can remove the oxygen from the hydrogen, but it will increase the water content. The hydrogen discharged from the first deoxygenation tank 2 is then passed sequentially into the first coarse separator 3 and the first enhanced separator 301 to physically remove most of the water in the hydrogen. Finally, the hydrogen passes through the first drying tank 4 to absorb the remaining small amount of water before being discharged into the main air outlet pipe 5. At this point, the purity of the hydrogen in the main air outlet pipe 5 is greatly improved.

[0071] Reference Figure 2 and Figure 3 The first deoxidation tank 2 includes a deoxidation tank body 21, with a deoxidation cover plate 22 disposed on the upper side of the deoxidation tank body 21, which closes the upper opening of the deoxidation tank body 21. A first heating pipe 23 is disposed on the lower side of the deoxidation cover plate 22. The first heating pipe 23 is inserted into the deoxidation tank body 21 along the axial direction. A first heating element 231 is disposed within the first heating pipe 23. The first heating element 231 is an electric heating wire, and one end of the first heating element 231 is connected to the deoxidation cover plate 22. Therefore, the first heating element 231 can heat the deoxidation tank body 21.

[0072] Reference Figure 2 and Figure 3The deoxidation tank body 21 is also provided with an oxygen absorbing layer 24. The oxygen absorbing layer 24 is made of a deoxidation catalyst. The deoxidation catalyst is mostly made of a metal with high deoxidation activity supported on a porous material. The metals with high deoxidation activity mainly include palladium, platinum, silver, chromium, copper, etc. The porous material mainly includes diatomaceous earth, activated alumina, molecular sieve, semiconductor powder, etc. The oxygen absorbing layer 24 is sleeved on the outside of the first heating pipe 23, and the side wall of the adsorption layer 44 is in contact with the inner wall of the deoxidation tank body 21. Therefore, the setting of the first heating pipe 23 can heat the oxygen absorbing layer 24 through the first heating element 231, so that the deoxidation catalyst can catalyze the chemical reaction of hydrogen and oxygen to produce water, thereby achieving the purpose of deoxidation.

[0073] Reference Figure 1 and Figure 3 A deoxidation inlet pipe 25 is provided on the deoxidation cover plate 22. One end of the deoxidation inlet pipe 25 is interconnected with the first heating pipe 23, and the other end is interconnected with the main inlet pipe 1. A deoxidation outlet pipe 26 is provided on the outer wall of the deoxidation tank 21 near the deoxidation cover plate 22. One end of the deoxidation outlet pipe 26 is interconnected with the deoxidation tank 21, and the other end is interconnected with the first intermediate pipe 11. Therefore, after the hydrogen discharged through the deoxidation inlet pipe 25 is heated by the first heating element 231, the oxygen in the hydrogen reacts with the hydrogen under the action of the catalyst in the adsorption layer 44, achieving deoxidation. The produced water is then carried into the first intermediate pipe 11 by the flow of hydrogen.

[0074] Reference Figure 1 and Figure 4 The first coarse separator 3 includes a cyclone separator 31. A fluid inlet pipe 311 is connected to the sidewall of the cyclone separator 31, a gas outlet pipe 312 is connected to the upper side, and a liquid outlet pipe 313 is connected to the lower end. The fluid inlet pipe 311 is connected to the first intermediate pipe 11, and the gas outlet pipe 312 is connected to the second intermediate pipe 12. Therefore, after the hydrogen containing impurities enters the cyclone separator 31, the cyclone separator 31 causes the liquid to move downward and be discharged from the liquid outlet pipe 313, while the hydrogen moves upward and flows from the gas outlet pipe 312 into the second intermediate pipe 12. As a result, the first coarse separator 3 can initially separate the hydrogen and water.

[0075] Reference Figure 4 and Figure 5 The outer wall of the cyclone separator 31 is provided with a cooling component 32, which is a heat exchanger or semiconductor. After the internal ambient temperature of the cyclone separator 31 drops, the hydrogen gas contacts the cold side wall of the cyclone separator 31, and water vapor condenses and precipitates, thereby further reducing the water content of the hydrogen gas.

[0076] Reference Figure 4 and Figure 5A closing assembly 33 is provided in the cyclone separator 31, and the closing assembly 33 includes a mounting seat 331. The mounting seat 331 is arranged on the upper side of the liquid discharge pipe 313 along the axial direction of the liquid discharge pipe 313, and the side wall of the mounting seat 331 is arranged at a distance from the inner wall of the cyclone separator 31, thereby ensuring that water can flow into the liquid discharge pipe 313.

[0077] Reference Figure 4 and Figure 5 The mounting base 331 has a mounting hole 3311 on one side facing the liquid discharge pipe 313. A sealing block 332 is inserted into the mounting hole 3311. The sealing block 332 is slidably connected to the inner wall of the mounting hole 3311 along the axial direction of the liquid discharge pipe 313. A sealing drive member 333 is disposed in the mounting hole 3311. In this application, the sealing drive member 333 adopts a plurality of drive springs 3331. The drive springs 3331 are arranged axially parallel to the axial direction of the liquid discharge pipe 313. The ends of the drive springs 3331 are respectively connected to the sealing block 332 and the inner wall of the mounting hole 3311. In addition, the sealing block 332 is plugged into and matched with the liquid discharge pipe 313. When the sealing block 332 is inserted into the liquid discharge pipe 313, the sealing block 332 seals the liquid discharge pipe 313.

[0078] Therefore, under normal conditions, the driving spring 3331 can contact the closing block 332 to close the liquid discharge pipe 313, preventing the hydrogen in the cyclone separator 31 from escaping. At the same time, when water needs to be drained, the closing block 332 only needs to be pushed upward, and the water will automatically drain from the liquid discharge pipe 313.

[0079] Reference Figure 5 A liquid storage tank 34 is provided at the lower end of the cyclone separator 31. The liquid storage tank 34 includes a connecting pipe 347 disposed on its upper side. One axial end of the connecting pipe 347 is connected to the liquid storage tank 34. A water storage hole 348 is formed through the upper side of the liquid storage tank 34. The water storage hole 348 and the connecting pipe 347 are in communication with each other. The inner diameter of the connecting pipe 347 is larger than the inner diameter of the water storage hole 348. The connecting pipe 347 is sleeved on the outer side of the liquid discharge pipe 313. The inner wall of the connecting pipe 347 is threadedly connected to the outer wall of the liquid discharge pipe 313. Therefore, the provision of the connecting pipe 347 enables communication between the liquid storage tank 34 and the liquid discharge pipe 313.

[0080] Reference Figure 5The lower side of the liquid storage tank 34 is provided with a top entry hole 341, which is coaxial with the water storage hole 348. A lifting rod 342 is inserted into the top entry hole 341 and is threadedly connected to the inner wall of the top entry hole 341. The lifting rod 342 is coaxially plugged into the liquid discharge pipe 313. The side wall of the lifting rod 342 is spaced apart from the inner wall of the liquid discharge pipe 313, and the upper end of the lifting rod 342 abuts against the sealing block 332. Therefore, when the lifting rod 342 is inserted and twisted, the upper end of the lifting rod 342 will upwardly abut against the sealing block 332 until the sealing block 332 releases the seal on the liquid discharge pipe 313. At this time, the liquid storage tank 34 and the liquid discharge pipe 313 are connected, and the liquid storage tank 34 is closed, so that the liquid storage tank 34 can store water discharged from the liquid discharge pipe 313.

[0081] Reference Figure 5 Liquid storage tank 34 is provided with a water-absorbing layer 346 made of a water-absorbing material. This layer 346 is sleeved over the outer side of lift rod 342, with the outer wall of layer 346 spaced apart from or slidably connected to the inner wall of liquid storage tank 34. Therefore, layer 346 absorbs water that flows into liquid storage tank 34, preventing it from flowing out. Furthermore, the presence of layer 346 facilitates replacement, reducing the time required to shut down cyclone separator 31.

[0082] Reference Figure 5 A heating assembly 345 is provided on the lifting rod 342 , and the heating assembly 345 includes a heating cavity 3451 . The heating cavity 3451 is opened on the lower side of the lifting rod 342 , and the heating cavity 3451 is opened along the axial direction of the lifting rod 342 .

[0083] Reference Figure 5 The heating assembly 345 also includes a heating rod 3452 and a closed deoxidation cover plate 3453. One axial end of the heating rod 3452 is connected to the closed deoxidation cover plate 3453. The closed deoxidation cover plate 3453 covers the underside of the lifting rod 342. The heating rod 3452 is plugged into the heating cavity 3451 along the axial direction of the lifting rod 342. The heating rod 3452 uses an electric heating wire. Therefore, when the heating rod 3452 is connected to electricity, it can heat the water absorption layer 346, causing the water in the water absorption layer 346 to vaporize and form water vapor.

[0084] Reference Figure 5The upper end of the water-absorbing layer 346 is spaced apart from the inner wall of the liquid storage tank 34, so that the space between the water-absorbing layer 346 and the inner wall of the liquid storage tank 34 can accommodate vaporized water vapor. A nitrogen gas supply pipe 343 and a nitrogen gas exhaust pipe 344 are connected to the side walls of the liquid storage tank 34, respectively. The nitrogen gas supply pipe 343 and the nitrogen gas exhaust pipe 344 are spaced apart from each other in the vertical direction, and the space between the upper end of the water-absorbing layer 346 and the inner wall of the liquid storage tank 34 is connected to the nitrogen gas exhaust pipe 344. Therefore, after heating the water-absorbing layer 346, nitrogen is introduced through the nitrogen gas supply pipe 343, and the nitrogen gas will carry away the vaporized water vapor and send it into the nitrogen gas exhaust pipe 344. This process can achieve the regeneration of the water-absorbing layer 346, allowing the saturated water-absorbing layer 346 to absorb water again.

[0085] Reference Figure 1 The first reinforced separator 301 has the same structure as the first coarse separator 3. Since the first coarse separator 3 separates water and hydrogen while cooling, when the hydrogen flow rate is high, some water will continue to flow backward with the hydrogen. However, the first reinforced separator 301 can intercept this water, reducing the water content of the hydrogen.

[0086] Reference Figure 1 The structure of the first drying tank 4 is similar to that of the first deoxidation tank 2 .

[0087] Reference Figure 1 and Figure 6 The first drying tank 4 includes a drying tank body 41, with a drying cover plate 42 disposed on the upper side of the drying tank body 41, which closes the upper opening of the drying tank body 41. A second heating pipe 43 is disposed on the lower side of the drying cover plate 42, extending axially into the drying tank body 41. A second heating element 431 is disposed within the second heating pipe 43. The second heating element 431 is an electric heating tube, one end of which is connected to the drying cover plate 42. Therefore, the second heating element 431 heats the drying tank body 41.

[0088] Reference Figure 1 and Figure 6 An adsorption layer 44 is also provided in the drying tank body 41. The adsorption layer 44 is made of an adsorbent with excellent water absorption performance. The adsorbent mainly includes: activated alumina, silica gel and molecular sieve.

[0089] Reference Figure 1 and Figure 6 A drying air inlet pipe 45 is provided on the drying cover plate 42. One end of the drying air inlet pipe 45 is interconnected with the second heating pipe 43, and the other end is interconnected with the third intermediate pipe 13. A drying air outlet pipe 46 is provided on the outer wall of the drying tank body 41 near the drying cover plate 42. One end of the drying air outlet pipe 46 is interconnected with the drying tank body 41, and the other end is interconnected with the main air outlet pipe 5.

[0090] Therefore, the second heating pipe 43 can, on the one hand, raise the temperature of the cooled hydrogen. On the other hand, after the adsorption layer 44 is saturated with water, the water in the water-absorbing layer 346 can be vaporized into water vapor by heating. At this time, nitrogen is discharged from the drying outlet pipe 46, allowing the nitrogen to carry the vaporized water vapor out of the drying outlet pipe 46, thereby regenerating the adsorption layer 44.

[0091] Reference Figure 1 The hydrogen production and purification system further includes a backflush mechanism 6, which includes a backflush source 61 capable of discharging nitrogen. The backflush source 61 includes a first backflush pipe 62, which is interconnected with the main air inlet pipe 1. Therefore, upon completion of hydrogen production, the backflush source 61 can discharge nitrogen, discharging hydrogen remaining in various pipelines and equipment to prevent explosion risks during disassembly or other circumstances.

[0092] Reference Figure 1 The backflush mechanism 6 further includes a water seal 64 and a second backflush tube 63. One end of the second backflush tube 63 is interconnected with the first backflush tube 62, and the other end is interconnected with the main outlet pipe 5. A backflush control valve 631 is provided on the second backflush tube 63. The main outlet pipe 5 is provided with an outlet control valve 51, and the second backflush tube 63 is located between the first drying tank 4 and the outlet control valve 51. Therefore, through the cooperation of the outlet control valve 51 and the backflush control valve 631, nitrogen can be discharged from the drying outlet pipe 46 into the drying tank.

[0093] Reference Figure 1 The drying air inlet pipe 45 is connected to a water seal pipe 65, the ends of which are in communication with the drying air inlet pipe 45 and the water seal device 64, respectively. A water seal control valve 66 is provided on the water seal pipe 65, and a third intermediate control valve 131 is provided on the third intermediate pipe 13. The water seal pipe 65 is located between the third intermediate control valve 131 and the first drying tank 4. Therefore, through the cooperation of the water seal control valve 66 and the third intermediate control valve 131, the nitrogen gas carrying water vapor discharged from the first drying tank 4 is discharged through the water seal pipe 65 into the water seal device 64. The water seal device 64 can store a small amount of the discharged water vapor.

[0094] Reference Figure 1 The outlet of the water seal 64 is connected to a flame arrester 67. The flame arrester 67 is provided to prevent a fire hazard accident from occurring when a small amount of water and water vapor mixed gas flowing out of the water seal 64 contains other gases except hydrogen.

[0095] Reference Figure 1 and Figure 5The nitrogen supply pipes 343 of the first coarse separator 3 and the first reinforced separator 301 are both interconnected with the second backflush pipe 63, and the nitrogen exhaust pipes 344 are both interconnected with the water seal pipe 65. The nitrogen supply pipes 343 are both located between the first drying tank 4 and the backflush control valve 631. Therefore, while the adsorption layer 44 in the first drying tank 4 is being backflushed and regenerated, the water absorption layer 346 in the liquid storage tank 34 can also be backflushed and regenerated simultaneously.

[0096] The working principle of the embodiment of the present application is as follows: First, the hydrogen production equipment introduces hydrogen into the hydrogen production and purification system. The hydrogen then passes through the first deoxygenation tank 2, the first coarse separator 3, the first enhanced separator 301, and the first drying tank 4, before being discharged. During this process, the hydrogen undergoes deoxygenation, a first dehydration, a second dehydration, and a third dehydration. Because the first and second dehydration processes both utilize a cyclone separator 31, which removes most of the water from the hydrogen, the first drying tank 4 is used to remove the remaining small amount of water, thereby extending the service life of the adsorption layer 44 within the first drying tank 4.

[0097] Secondly, the backflushing mechanism 6 can backflush the adsorption layer 44 in the first drying tank 4 to achieve backflushing regeneration of the adsorption layer 44 , thereby reducing the frequency of replacing the adsorption layer 44 in the first drying tank 4 .

[0098] This embodiment also discloses a hydrogen production device, which adopts the hydrogen production and purification system as described above.

[0099] The implementation principle of the embodiment of the present application is: by connecting the above-mentioned hydrogen production and purification system to the hydrogen production equipment, the purity of the prepared hydrogen can be improved.

[0100] Example 2:

[0101] A hydrogen production and purification system, referring to Figure 7 This embodiment differs from Embodiment 1 in that the hydrogen production and purification system further includes a second deoxygenation tank 200, a second coarse separator 300, a second reinforced separator 302, and a second drying tank 400. The second deoxygenation tank 200 has the same structure as the first deoxygenation tank 2, the second coarse separator 300 has the same structure as the first coarse separator 3, the second reinforced separator 302 has the same structure as the first reinforced separator 301, and the second drying tank 400 has the same structure as the first drying tank 4.

[0102] Reference Figure 7 and Figure 8A first branch pipe 27 and a second branch pipe 201 are provided on the main air intake pipe 1. The two ends of the first branch pipe 27 are respectively communicated with the main air intake pipe 1 and the deoxygenation air intake pipe 25 on the first deoxygenation tank 2. The two ends of the second branch pipe 201 are respectively communicated with the main air intake pipe 1 and the deoxygenation air intake pipe 25 on the second deoxygenation tank 200. A first control valve 271 is provided on the first branch pipe 27, and a fourth control valve 2021 is provided on the second branch pipe 201.

[0103] Reference Figure 7 and Figure 8 A third branch pipe 28 and a fourth branch pipe 202 are provided on the first intermediate pipe 11. The two ends of the third branch pipe 28 are respectively connected to the deoxygenation outlet pipe 26 on the first deoxygenation tank 2 and the first intermediate pipe 11. The two ends of the fourth branch pipe 202 are respectively connected to the deoxygenation outlet pipe 26 on the second deoxygenation tank 200 and the first intermediate pipe 11. A third control valve 281 is provided on the third branch pipe 28, and a fourth control valve 2021 is provided on the fourth branch pipe 202.

[0104] Therefore, by controlling the corresponding first and third control valves 271 and 281, the first deaerator tank 2 can be connected to the hydrogen production and purification system. Similarly, by controlling the corresponding second and fourth control valves 2011 and 2021, the second deaerator tank 200 can be connected to the hydrogen production and purification system. This arrangement allows for replacement of one of the oxygen absorption layers 24 by disconnecting that side and opening the other, eliminating the need to shut down the entire hydrogen production and purification system.

[0105] Reference Figure 7 and Figure 8 A fifth branch pipe 29 is provided between the first branch pipe 27 and the first intermediate pipe 11. Both ends of the fifth branch pipe 29 are connected to the first branch pipe 27 and the first intermediate pipe 11, respectively. The connection point between the fifth branch pipe 29 and the first branch pipe 27 is located between the first control valve 271 and the first deaerator tank 2.

[0106] A sixth branch pipe 203 is provided between the second branch pipe 201 and the first intermediate pipe 11. Both ends of the sixth branch pipe 203 communicate with the second branch pipe 201 and the first intermediate pipe 11, respectively. The connection point between the sixth branch pipe 203 and the second branch pipe 201 is located between the second control valve 2011 and the second deaerator tank 200.

[0107] A first intermediate control valve 111 is provided on the first intermediate pipeline 11, the fifth branch pipe 29 and the sixth branch pipe 203 are located on the side of the first intermediate control valve 111 away from the first deoxygenation tank 2, and the third branch pipe 28 and the fourth branch pipe 202 are located on the side of the first intermediate control valve 111 close to the first deoxygenation tank 2.

[0108] Therefore, through the cooperation of the first control valve 271, the second control valve 2011, the third control valve 281, the fourth control valve 2021, the fifth control valve 291, the sixth control valve 2031 and the first intermediate control valve 111, the hydrogen production and purification system can achieve the following four states:

[0109] The first type: the first control valve 271 is open, the second control valve 2011 is closed, the third control valve 281 is open, the fourth control valve 2021 is closed, the fifth control valve 291 is closed, the sixth control valve 2031 is closed, and the first intermediate control valve 111 is open. In this case, only the first deoxygenation tank 2 is connected to the hydrogen production and purification system.

[0110] Second: First control valve 271 is closed, second control valve 2011 is open, third control valve 281 is closed, fourth control valve 2021 is open, fifth control valve 291 is closed, sixth control valve 2031 is closed, and first intermediate control valve 111 is open. In this case, only second deoxygenation tank 200 is connected to the hydrogen production and purification system.

[0111] The third option: First control valve 271 is open, second control valve 2011 is closed, third control valve 281 is open, fourth control valve 2021 is open, fifth control valve 291 is closed, sixth control valve 2031 is open, and first intermediate control valve 111 is closed. In this case, the first deoxygenation tank 2 and the second deoxygenation tank 200 are connected in series and integrated into the hydrogen production and purification system. The hydrogen exhausted from the first deoxygenation tank 2 flows into the second deoxygenation tank 200, achieving double deoxygenation of the hydrogen.

[0112] Fourth scenario: First control valve 271 is closed, second control valve 2011 is open, third control valve 281 is open, fourth control valve 2021 is open, fifth control valve 291 is open, sixth control valve 2031 is closed, and first intermediate control valve 111 is closed. In this scenario, the first deoxygenation tank 2 and the second deoxygenation tank 200 are connected in series to the hydrogen production and purification system. The hydrogen exhausted from the second deoxygenation tank 200 flows into the first deoxygenation tank 2, achieving double deoxygenation of the hydrogen.

[0113] Therefore, according to the actual deoxygenation needs, the opening and closing of the above-mentioned first control valve 271, second control valve 2011, third control valve 281, fourth control valve 2021, fifth control valve 291, sixth control valve 2031 and first intermediate control valve 111 are controlled to achieve switching among the above-mentioned four modes.

[0114] Reference Figure 7 and Figure 8The pipeline connection relationship between the first coarse separator 3 and the second coarse separator 300, the pipeline connection relationship between the second reinforced separator 302 and the first reinforced separator 301, and the pipeline connection relationship between the first drying tank 4 and the second drying tank 400 are all the same as the pipeline connection relationship between the first deoxygenation tank 2 and the second deoxygenation tank 200.

[0115] Therefore, this arrangement enables, on the one hand, switching between the first deoxygenation tank 2 and the second deoxygenation tank 200, between the first coarse separator 3 and the second coarse separator 300, between the first reinforced separator 301 and the second reinforced separator 302, and between the first drying tank 4 and the second drying tank 400. This allows for timely switching when a device malfunctions and requires maintenance, eliminating the need to shut down the hydrogen production and purification system. Furthermore, the first deoxygenation tank 2 and the second deoxygenation tank 200, the first coarse separator 3 and the second coarse separator 300, the first reinforced separator 301 and the second reinforced separator 302, and the first drying tank 4 and the second drying tank 400 are all connected simultaneously to the hydrogen production and purification system, improving the purification efficiency of the produced hydrogen.

[0116] Reference Figure 9 The nitrogen gas supply pipes 343 of the first coarse separator 3, the first reinforced separator 301, the second coarse separator 300, and the second reinforced separator 302 are all interconnected with the second backflush pipe 63 and are each provided with a gas supply control valve 3431. The nitrogen gas exhaust pipes 344 of the first coarse separator 3, the first reinforced separator 301, the second coarse separator 300, and the second reinforced separator 302 are all interconnected with the water seal pipe 65 and are each provided with a gas exhaust control valve 3441. Therefore, by controlling the opening and closing of the corresponding gas supply control valves 3431 and gas exhaust control valves 3441, backflush regeneration of the corresponding water absorption layer 346 can be achieved.

[0117] The implementation principle of the present embodiment is as follows: a second deoxygenator 200 is provided on the side of the first deoxygenator 2. Through the coordination of a piping system and control valves, the second deoxygenator 200 can be connected to the hydrogen production and purification system to replace the first deoxygenator 2, or the second deoxygenator 200 and the first deoxygenator 2 can be connected in series. When the second deoxygenator 200 replaces the first deoxygenator 2, it is convenient to replace the oxygen absorption layer 24 in the first deoxygenator. When the second deoxygenator 200 and the first deoxygenator 2 are connected in series, the removal of oxygen from the hydrogen can be improved. Similarly, the second coarse separator 300 provided on the side of the first coarse separator 3 can achieve the same effect as described above through the coordination of a piping system and control valves. Similarly, the second reinforced separator 302 provided on the side of the first reinforced separator 301 can achieve the same effect as described above through the coordination of a piping system and control valves. Similarly, the second drying tank 400 provided on the side of the first drying tank 4 can achieve the same effect as described above through the coordination of a piping system and control valves.

[0118] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A hydrogen production and purification system, comprising a main air inlet pipe (1), characterized in that: One end of the main air inlet pipe (1) is connected in sequence to a first deoxidation tank (2), a first coarse separator (3), a first drying tank (4), and a main air outlet pipe (5); The first coarse separator (3) comprises a cyclone separator (31), and a cooling component (32) is provided on the cyclone separator (31); The cyclone separator (31) is respectively connected to a fluid discharge pipe (311), a gas discharge pipe (312), and a liquid discharge pipe (313); the fluid discharge pipe (311) is connected to the first deoxidation tank (2), and the gas discharge pipe (312) is connected to the first drying tank (4); A sealing assembly (33) is provided in the cyclone separator (31), the sealing assembly (33) comprising a mounting seat (331), a side wall of the mounting seat (331) and an inner wall of the cyclone separator (31) being spaced apart from each other, and the mounting seat (331) and the liquid discharge pipe (313) being spaced apart from each other along the axial direction of the liquid discharge pipe (313); A closing block (332) is provided on a side of the mounting seat (331) facing the liquid discharge pipe (313); the closing block (332) is plugged into and matched with the liquid discharge pipe (313) along the axial direction of the liquid discharge pipe (313); when the closing block (332) is inserted into the liquid discharge pipe (313), the closing block (332) closes the liquid discharge pipe (313); A closing drive member (333) capable of driving the closing block (332) to move toward the liquid discharge pipe (313) is provided between the closing block (332) and the mounting seat (331).

2. A hydrogen production and purification system according to claim 1, characterized in that: One end of the liquid discharge pipe (313) away from the closing component (33) is connected to a liquid storage tank (34), and the liquid storage tank (34) is sleeved on the outside of the liquid discharge pipe (313); The liquid storage tank (34) is detachably connected to the liquid discharge pipe (313).

3. A hydrogen production and purification system according to claim 2, characterized in that: An entry hole (341) is formed through the outer wall of the liquid storage tank (34), a lifting rod (342) is inserted into the entry hole (341), the lifting rod (342) is coaxially arranged with the liquid discharge pipe (313), and the lifting rod (342) is connected to the inner wall of the entry hole (341) via a threaded connection; The closed driving member (333) includes a plurality of driving springs (3331). The length direction of the driving springs (3331) is arranged along the axial direction of the liquid discharge pipe (313). The two ends of the driving springs (3331) are respectively connected to the mounting seat (331) and the closing block (332).

4. A hydrogen production and purification system according to claim 2, characterized in that: The liquid storage tank (34) is connected to a nitrogen gas supply pipe (343) and a nitrogen gas exhaust pipe (344) respectively; A heating component (345) is provided in the liquid storage tank (34).

5. A hydrogen production and purification system according to claim 4, characterized in that: A water absorbing layer (346) is provided in the liquid storage tank (34).

6. A hydrogen production and purification system according to claim 1, characterized in that: A second deoxidation tank (200) is provided on one side of the first deoxidation tank (2); The main air intake pipe (1) is connected to a first branch pipe (27) and a second branch pipe (201), respectively; the first branch pipe (27) is connected to the first deoxidation tank (2), and the second branch pipe (201) is connected to the second deoxidation tank (200); a first control valve (271) is provided on the first branch pipe (27), and a second control valve (2011) is provided on the second branch pipe (201); The first deoxidation tank (2) is connected to a third branch pipe (28), the second deoxidation tank (200) is connected to a fourth branch pipe (202), a first intermediate pipe (11) is provided between the first deoxidation tank (2) and the first coarse separator (3), the first intermediate pipe (11) and the first coarse separator (3) are interconnected, the third branch pipe (28) and the fourth branch pipe (202) are both interconnected with the first intermediate pipe (11), and one end of the first intermediate pipe (11) is interconnected with the first coarse separator (3); The third branch pipe (28) is provided with a third control valve (281), and the fourth branch pipe (202) is provided with a fourth control valve (2021).

7. A hydrogen production and purification system according to claim 6, characterized in that: The first branch pipe (27) is connected to a fifth branch pipe (29), the connection point between the fifth branch pipe (29) and the first branch pipe (27) is located between the first control valve (271) and the first deoxidation tank (2), and the fifth branch pipe (29) is connected to the first intermediate pipe (11); The second branch pipe (201) is connected to a sixth branch pipe (203), the connection point between the sixth branch pipe (203) and the second branch pipe (201) is located between the second control valve (2011) and the second deoxidation tank (200), and the sixth branch pipe (203) is connected to the first intermediate pipe (11); The fifth branch pipe (29) is provided with a fifth control valve (291), and the sixth branch pipe (203) is provided with a sixth control valve (2031); A first intermediate control valve (111) is provided on the first intermediate pipe (11). The first intermediate control valve (111) is located between the third branch pipe (28) and the fifth branch pipe (29), and between the fourth branch pipe (202) and the sixth branch pipe (203).

8. A hydrogen production and purification system according to claim 1, characterized in that: It also includes a backflush mechanism (6), wherein the backflush mechanism (6) includes a backflush source (61), and the backflush source (61) is in communication with the main air intake pipe (1).

9. A hydrogen production device, characterized in that: A hydrogen production and purification system according to any one of claims 1 to 8 is installed.

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