Apparatus and method for separating hydrogen from biomass combustible gas

Abstract

The application discloses a biomass combustible gas hydrogen separation device and separation method, relates to the technical field of separation, and comprises a first separation box and a gas supply pipe arranged at the left upper side of the first separation box. A washing liquid for loading washing water is arranged in the first separation box. The right end of the gas supply pipe is provided with a washing water inlet pipe extending into the first separation box. The lower end of the washing water inlet pipe extends below the liquid level in the first separation box. The first separation box is provided with a vertical impurity removal filter plate for filtering the washed gas. The application is designed according to the existing needs. The pyrolysis gas can be subjected to solid impurity removal treatment, so that only gas exists in the exhaust gas, the screening efficiency of the molecular sieve in the later stage is ensured, the residual solid in the washing liquid can be removed, the washing effect is ensured, the impurity removal filter plate can be subjected to scraping operation, the problem of exhaust gas blockage is avoided, the separation efficiency of hydrogen is further ensured, and the practicality is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of separation technology, in particular to a device and method for separating hydrogen from biomass combustible gas. BACKGROUND

[0002] In recent years, hydrogen fuel cell vehicles have been highly valued by governments and well-known automobile manufacturers, and have developed rapidly. One of the best fuels for fuel cells is hydrogen, because its product is water, and it can truly achieve zero emissions. The hydrogen content in biomass pyrolysis oil is much higher than that in fossil fuels. Using biomass fast pyrolysis oil to produce hydrogen, in addition to the target product hydrogen, there are also a large amount of other gases in the tail gas. After screening by molecular sieve, the target gas is collected. In the process of oil cracking, a large amount of solid impurities are also mixed in the gas. Such fixed impurities have great interference with the screening of molecular sieve, which is not conducive to improving the screening efficiency of molecular sieve. Based on this, the present application provides a device and method for separating hydrogen from biomass combustible gas, which can eliminate the disadvantages of existing devices. SUMMARY

[0003] The present application aims to provide a device and method for separating hydrogen from biomass combustible gas to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] The device for separating hydrogen from biomass combustible gas comprises a first separation tank and a gas supply pipe arranged on the upper left side of the first separation tank. A washing liquid for loading washing water is arranged in the first separation tank. The right end of the gas supply pipe is provided with a washing water inlet pipe extending into the interior of the first separation tank. The lower end of the washing water inlet pipe extends below the liquid level in the interior of the first separation tank. The first separation tank is provided with a vertical impurity removal filter plate for filtering the gas after washing. The right side of the impurity removal filter plate is provided with a scraping mechanism for scraping the blockage on the surface of the impurity removal filter plate. The outer side of the first separation tank is provided with a circulating impurity removal mechanism. The exhaust end on the right side of the first separation tank is connected to a second separation tank through a communication pipe. The second separation tank is provided with a mixed gas exhaust pipe on one side for exhausting mixed gas. The interior of the second separation tank is provided with an inner cylinder. The end of the inner cylinder is provided with a molecular sieve for filtering hydrogen. The outer end of the inner cylinder is provided with a hydrogen exhaust pipe for exhausting gas.

[0006] On the basis of the above-mentioned technical solutions, the present application also provides the following optional technical solutions:

[0007] In an optional solution, the circulating impurity removal mechanism comprises a drainage port arranged at the bottom of the first separation tank, a filter tank for carrying the washing liquid is arranged below the drainage port, a collection net for filtering impurities is detachably arranged in the filter tank, a backwater pipe for discharging gas is arranged at the liquid discharge end of the right side of the filter tank, the backwater pipe is in communication with the liquid suction end of the circulating liquid pump, the liquid discharge end of the circulating liquid pump is in communication with the water supply pipe, the water supply pipe extends above the first separation tank, and the water supply pipe is provided with a first water outlet pipe and a second water outlet pipe for communication with the first separation tank.

[0008] In an optional solution, the drainage port is provided with a stirring mechanism for stirring the washing liquid in the first separation tank, and the stirring mechanism is arranged to avoid the deposition of solid impurities. The stirring mechanism comprises a discharge pipe rotatably arranged in the discharge port, a flat plate flush with the inner bottom of the first separation tank is arranged at the upper end of the discharge pipe, a plurality of stirring frames are distributed on the outer side of the upper end of the flat plate, and a rotary driving member for driving the rotation of the discharge pipe is connected to the outer side of the discharge pipe.

[0009] In an optional solution, the rotary driving member comprises a driven gear arranged on the outer side of the discharge pipe, the driven gear is in meshing connection with a driving gear, and the driving gear is connected to a driving motor for driving the rotation of the driving gear.

[0010] In an optional solution, the scraping mechanism comprises a water carrying tank arranged in the first separation tank, a connecting rod is arranged at the left end of the water carrying tank, the connecting rod is connected to a scraping strip through a transmission thin plate, the scraping strip is slidably arranged on the filtering surface of the left side of the impurity removal filter plate, a transmission slot is arranged at the middle position of the impurity removal filter plate, two sealing strips in close contact are arranged at the transmission slot, the transmission thin plate is clamped between the two sealing strips, when the transmission thin plate moves, the two sealing strips are separated, so as to avoid the problem of poor sealing caused by transmission, a reset mechanism for driving the upward reset of the water carrying tank is connected to the right side of the water carrying tank, a drainage member for draining water is arranged on the water carrying tank, and the position of the water carrying tank corresponds to the position of the second water outlet pipe.

[0011] In an optional solution, the position of the first water outlet pipe corresponds to the position of the impurity removal filter plate, so as to form a filtering water curtain on the filtering surface of the impurity removal filter plate.

[0012] In an optional solution, the drainage member comprises a discharge port arranged at the bottom of the water carrying tank, a sliding hole is arranged at the middle position of the water carrying tank, a top-opening vertical rod is slidably arranged in the sliding hole, a movable sealing plate for sealing the discharge port is arranged at the upper end of the top-opening vertical rod, a side block is arranged at the lower side of the top-opening vertical rod, and the side block and the bottom of the water carrying tank are connected through a damping spring.

[0013] In an alternative: the reset mechanism includes a reset block arranged at the right end of the water-carrying tank, the reset block is slidingly arranged with the guide vertical rod, the upper side of the reset block is fixedly connected with the inner top of the first separation tank through the elastic rope, the upper side of the reset block is provided with an iron sheet, the inner top of the first separation tank is provided with an electromagnet for adsorbing the iron sheet, and the first separation tank where the electromagnet is arranged is provided with a weighing meter for detecting the water-carrying amount in the water-carrying tank.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] The present application is designed for the existing needs, can carry out solid impurity treatment to the cracking gas, ensure that only gas exists in the exhaust gas, ensure the screening efficiency of the molecular sieve in the later stage, and the residual solid in the washing liquid can also be removed here, ensure the washing effect, in addition, the scraping operation can be carried out on the impurity removal filter plate, avoid the problem of exhaust blockage, further ensure the separation efficiency of hydrogen, and the practicability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application.

[0017] Figure 2 It is a structural schematic diagram of the present application.

[0018] Figure 3 It is a structural schematic diagram of one side of the impurity removal filter plate of the present application.

[0019] Figure 4 It is a structural schematic diagram of the other side of the impurity removal filter plate of the present application.

[0020] The drawings are as follows: the first separation tank 11, the gas supply pipe 12, the scraping strip 13, the transmission thin plate 14, the connecting rod 15, the first water outlet pipe 16, the second water outlet pipe 17, the electromagnet 18, the iron sheet 19, the water-carrying tank 20, the movable sealing plate 21, the guide vertical rod 22, the top opening vertical rod 23, the circulating liquid pump 24, the impurity removal filter plate 25, the water return pipe 26, the filter groove 27, the collection net 28, the driven gear 29, the discharging pipe 30, the driving gear 31, the driving motor 32, the stirring frame 33, the washing water supply pipe 34, the impure gas discharge pipe 35, the hydrogen exhaust pipe 36, the molecular sieve 37, the second separation tank 38, the communication pipe 39, the reset block 40. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples.

[0022] In one embodiment, as Figures 1-4As shown, the hydrogen separation device in the biomass combustible gas includes a first separation tank 11 and a gas supply pipe 12 arranged on the upper left side of the first separation tank 11, a washing liquid for loading washing water in the first separation tank 11, and a washing water pipe 34 extending to the inside of the first separation tank 11 arranged at the right end of the gas supply pipe 12. The lower end of the washing water pipe 34 extends below the liquid level in the first separation tank 11. The first separation tank 11 is provided with a vertical impurity removal filter plate 25 for filtering the washed gas. The right side of the impurity removal filter plate 25 is provided with a scraping mechanism for scraping the blockage on the surface of the impurity removal filter plate 25. The outside of the first separation tank 11 is provided with a circulating impurity removal mechanism for removing the solid impurities in the washing liquid, thereby ensuring the washing quality of the washing liquid. The exhaust end on the right side of the first separation tank 11 is communicated with a second separation tank 38 through a communication pipe 39. The second separation tank 38 is provided with a gas exhaust pipe 35 for exhausting the impure gas. The inside of the second separation tank 38 is provided with an inner cylinder, and the end of the inner cylinder is provided with a molecular sieve 37 for filtering hydrogen. The outer end of the inner cylinder is provided with a hydrogen exhaust pipe 36 for exhausting gas. In actual use, the cracked gas is first sent into the first separation tank 11 along the gas supply pipe 12. After the preliminary washing is completed, the gas is filtered through the impurity removal filter plate 25. Then, the gas enters the second separation tank 38. The hydrogen is separated from the hydrogen exhaust pipe 36 through the screening of the molecular sieve 37, collected by the hydrogen collection device, and the impure gas is exhausted along the impure gas exhaust pipe 35, thereby completing the separation of hydrogen.

[0023] The circulating impurity removal mechanism includes a drainage port arranged at the bottom of the first separation tank 11. A filter tank 27 for loading the washing liquid is arranged below the drainage port. The filter tank 27 is detachably provided with a collection net 28 for filtering impurities. A water return pipe 26 for exhausting gas is arranged at the liquid discharge end on the right side of the filter tank 27. The right end of the water return pipe 26 is communicated with the liquid suction end of a circulating liquid pump 24. The liquid discharge end of the circulating liquid pump 24 is communicated with a water supply pipe extending above the first separation tank 11. The water supply pipe is provided with a first water outlet pipe 16 and a second water outlet pipe 17 for communicating with the first separation tank 11. Under the action of the circulating liquid pump 24, the liquid in the filter tank 27 is sent to above the first separation tank 11 and then sent back to the first separation tank 11 along the first water outlet pipe 16 and the second water outlet pipe 17. The waste water in the first separation tank 11 is exhausted along the drainage port and then enters the filter tank 27, thereby completing the impurity filtration.

[0024] The drainage port position is provided with a stirring mechanism for stirring the washing liquid inside the first separation tank 11. The stirring mechanism is provided to avoid the deposition of solid impurities. The stirring mechanism comprises a discharging pipe 30 rotatably arranged in the discharge port. The upper end of the discharging pipe 30 is provided with a flat plate flush with the bottom of the first separation tank 11. The outer side of the upper end of the flat plate is provided with a plurality of stirring frames 33. The outer side of the discharging pipe 30 is connected with a rotary driving member for driving the rotation of the discharging pipe 30. The rotation of the discharging pipe 30 is driven by the rotary driving member, and the rotation of the stirring frames 33 is driven by the discharging pipe 30. As a result, the solid impurities are in a suspended state.

[0025] The rotary driving member comprises a driven gear 29 arranged on the outer side of the discharging pipe 30. The driven gear 29 is in meshing engagement with a driving gear 31. The driving gear 31 is connected with a driving motor 32 for driving the rotation of the driving gear 31. The rotation of the driving gear 31 is driven by the driving motor 32. The rotation of the discharging pipe 30 is driven by the driving gear 31 through the driven gear 29. The rotation of the flat plate and the stirring frames 33 is driven by the discharging pipe 30. As a result, power is provided for stirring.

[0026] The scraping mechanism comprises a water carrying tank 20 arranged inside the first separation tank 11. The left end of the water carrying tank 20 is provided with a connecting rod 15. The connecting rod 15 is connected with a scraping strip 13 through a transmission thin plate 14. The scraping strip 13 is in sliding arrangement with the filtering surface of the left side of the impurity removing filter plate 25. A transmission slot is formed in the middle position of the impurity removing filter plate 25. Two sealing strips in close contact are arranged in the transmission slot. The transmission thin plate 14 is clamped between the two sealing strips. When the transmission thin plate 14 moves, the two sealing strips are separated, thereby avoiding the problem of poor sealing caused by transmission. The right side of the water carrying tank 20 is connected with a reset mechanism for driving the upward reset of the water carrying tank 20. The water carrying tank 20 is provided with a drainage member for drainage. The position of the water carrying tank 20 corresponds to the position of the second water outlet pipe 17, so as to collect the backflow water.

[0027] The position of the first water outlet pipe 16 corresponds to the position of the impurity removing filter plate 25, so as to form a filtering water curtain on the filtering surface of the impurity removing filter plate 25, thereby improving the filtering effect.

[0028] The drainage member comprises a discharge port arranged at the bottom of the water carrying tank 20. A sliding hole is formed in the middle position of the water carrying tank 20. A top opening vertical rod 23 is slidably arranged in the sliding hole. The upper end of the top opening vertical rod 23 is provided with a movable sealing plate 21 for sealing the discharge port. The lower side of the top opening vertical rod 23 is provided with a side block. The side block and the bottom of the water carrying tank 20 are connected through a damping spring. When the water carrying tank 20 descends to the lower side, the water carrying tank 20 has not contacted with the liquid surface. The lower end of the top opening vertical rod 23 contacts with the bottom of the first separation tank 11, thereby canceling the sealing of the discharge port by the water carrying tank 20, so that the stored water is quickly discharged.

[0029] The reset mechanism includes a reset block 40 located at the right end of the water tank 20. The reset block is slidably disposed with the guide rod 22. The upper side of the reset block is connected and fixed to the top of the first separation box 11 by an elastic rope. An iron plate 19 is provided on the upper side of the reset block. An electromagnet 18 for attracting the iron plate 19 is provided at the top of the first separation box 11. A weighing scale for detecting the water content in the water tank 20 is provided on the first separation box 11 where the electromagnet 18 is located. When the weighing scale detects that the water content in the water tank 20 reaches the set value, the electromagnet 18 is de-energized, thereby removing the fixation of the water tank 20. At this time, the water tank 20 will fall rapidly under the action of gravity, thereby driving the scraper 13 to scrape the surface of the impurity removal filter plate 25. When it falls to the bottom, the drain device opens quickly to drain all the water in the water tank 20. At this time, under the action of the elastic rope, the water tank 20 quickly resets, ready for the next scraping.

[0030] The above embodiments disclose a hydrogen separation device for biomass combustible gas. In actual use, the pyrolyzed gas is first fed into the washing water pipe 34 along the gas supply pipe 12. The gas then enters the first separation tank 11 below the liquid level, completing the initial washing of the gas. Subsequently, the gas passes through the impurity removal filter plate 25 for a second filtration. At this point, solid impurities in the gas are basically removed. The circulating impurity removal mechanism continuously removes the solid impurities accumulated inside the first separation tank 11, ensuring the washing effect of the gas. Under the action of the circulating impurity removal mechanism, a water curtain is formed on the impurity removal filter plate 25, improving the gas... The water tank 20 will accumulate water due to the impurity removal effect. When the weighing scale detects that the water volume in the water tank 20 has reached the set value, the electromagnet 18 will be de-energized, thereby removing the fixation of the water tank 20. At this time, the water tank 20 will fall rapidly under the action of gravity, thereby driving the scraper 13 to scrape the surface of the impurity removal filter plate 25. When it falls to the bottom, the drain device will open quickly to drain all the water in the water tank 20. At this time, under the action of the elastic rope, the water tank 20 will quickly reset, ready for the next scraping. The gas after impurity removal enters the second separation box 38, and the gas is sieved by the molecular sieve 37 to complete the separation of hydrogen.

[0031] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A hydrogen separation device for biomass combustible gas, comprising a first separation chamber (11) and a gas supply pipe (12) disposed on its upper left side, wherein the first separation chamber (11) is used to hold washing liquid for washing water, and the right end of the gas supply pipe (12) is provided with a washing water insertion pipe (34) extending into the interior of the first separation chamber (11), characterized in that, The lower end of the washing water pipe (34) extends below the liquid level inside the first separation box (11). The first separation box (11) is provided with a vertically arranged impurity removal filter plate (25) for filtering the washed gas. The right side of the impurity removal filter plate (25) is provided with a scraping mechanism for scraping the blockage on the surface of the impurity removal filter plate (25). The outside of the first separation box (11) is provided with a circulating impurity removal mechanism. The exhaust end on the right side of the first separation box (11) is connected to the second separation box (38) through a connecting pipe (39). The second separation box (38) is provided with an impurity gas exhaust pipe (35) for discharging impurities on one side. The second separation box (38) is provided with an inner cylinder. The end of the inner cylinder is provided with a molecular sieve (37) for filtering hydrogen. The outer end of the inner cylinder is provided with a hydrogen exhaust pipe (36) for exhausting gas. The circulating impurity removal mechanism includes a drain port located at the bottom of the first separation box (11), and a filter tank (27) for holding the washing liquid is provided below the drain port. The filter tank (27) has a return water pipe (26) for venting at the drain end on the right side. The right end of the return water pipe (26) is connected to the pumping end of the circulating liquid pump (24). The drain end of the circulating liquid pump (24) is connected to the water supply pipe. The water supply pipe extends to the top of the first separation tank (11). The end of the water supply pipe is provided with a first outlet pipe (16) and a second outlet pipe (17) for connecting with the first separation tank (11). The scraping mechanism includes a water tank (20) located inside the first separation box (11). A connecting rod (15) is provided at the left end of the water tank (20). The connecting rod (15) is connected to the scraping strip (13) through a transmission plate (14). The scraping strip (13) is slidably disposed with the filter surface on the left side of the impurity removal filter plate (25). The right side of the water tank (20) is connected to a reset mechanism for driving it to reset upwards; The reset mechanism includes a reset block located at the right end of the water tank (20). The reset block is slidably disposed with the guide rod (22). The upper side of the reset block is connected and fixed to the top of the first separation box (11) by an elastic rope. An iron plate (19) is provided on the upper side of the reset block. An electromagnet (18) for attracting the iron plate (19) is provided at the top of the first separation box (11). A weighing scale for detecting the amount of water in the water tank (20) is provided on the first separation box (11) where the electromagnet (18) is located.

2. The hydrogen separation device for biomass combustible gas according to claim 1, characterized in that, The filter tank (27) is detachably equipped with a collection screen (28) for filtering impurities.

3. The hydrogen separation device for biomass combustible gas according to claim 2, characterized in that, The drain port is provided with a stirring mechanism for stirring the washing liquid inside the first separation tank (11). The stirring mechanism is designed to prevent the sedimentation of solid impurities. The stirring mechanism includes a discharge pipe (30) that is rotatably installed in the discharge port. The upper end of the discharge pipe (30) is provided with a flat plate that is flush with the bottom of the first separation tank (11). Several stirring racks (33) are distributed on the outer side of the upper end of the flat plate. A rotary drive is connected to the outer side of the discharge pipe (30) to drive it to rotate.

4. The hydrogen separation device for biomass combustible gas according to claim 3, characterized in that, The rotary drive includes a driven gear (29) disposed outside the feed tube (30), a drive gear (31) meshing with the driven gear (29), and the drive gear (31) being connected to a drive motor (32) for driving its rotation.

5. The hydrogen separation device for biomass combustible gas according to claim 2, characterized in that, The filter plate (25) has a transmission slot in the middle. Two tightly contacting sealing strips are provided at the transmission slot. The transmission plate (14) is sandwiched between the two sealing strips. When the transmission plate (14) moves, the two sealing strips will be separated to avoid poor sealing caused by transmission. The water tank (20) is provided with a drainage component for drainage. The position of the water tank (20) corresponds to the position of the second water outlet pipe (17).

6. The hydrogen separation device for biomass combustible gas according to claim 1, characterized in that, The position of the first water outlet pipe (16) corresponds to the position of the impurity removal filter plate (25), thereby forming a filter water curtain on the filter surface of the impurity removal filter plate (25).

7. The hydrogen separation device for biomass combustible gas according to claim 5, characterized in that, The drainage component includes a discharge port at the bottom of the water tank (20). A sliding hole is provided in the middle of the water tank (20), and a top-opening vertical rod (23) is slidably provided in the sliding hole. The upper end of the top-opening vertical rod (23) is provided with a movable sealing plate (21) for blocking the discharge port. A side block is provided on the lower side of the top-opening vertical rod (23), and the side block is connected to the bottom of the water tank (20) by a damping spring.

8. A separation method for a hydrogen separation device in biomass combustible gas according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: First, send the pyrolyzed gas into the washing water pipe (34) along the gas supply pipe (12). The gas enters the first separation box (11) below the liquid level along the washing water pipe (34) to complete the initial washing of the gas. Then the gas will pass through the impurity removal filter plate (25) to complete the second filtration. Step 2: The circulating impurity removal mechanism continuously removes the solid impurities accumulated inside the first separation box (11). Under the action of the circulating impurity removal mechanism, a water curtain is formed on the impurity removal filter plate (25), so that water will be stored inside the water tank (20). When the weighing scale detects that the water volume in the water tank (20) reaches the set value, the electromagnet (18) is de-energized, thereby removing the fixation of the water tank (20). At this time, the water tank (20) will fall rapidly under the action of gravity, thereby driving the scraper (13) to scrape the surface of the impurity removal filter plate (25). When it falls to the bottom, the drainage component opens quickly to drain all the water in the water tank (20). At this time, under the action of the elastic rope, the water tank (20) quickly resets, ready for the next scraping. Step 3: After impurity removal, the gas enters the second separation chamber (38) and is sieved using a molecular sieve (37) to separate the hydrogen.

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