Hydrogen tail gas recovery and purification device

Abstract

The utility model provides a hydrogen tail gas recycling and purifying device which comprises a gas separator, a gas purifier, a cooler, a compressor and a hydrogen storage tank, the gas separator is communicated with a hydrogen internal combustion engine and used for collecting gas generated by the hydrogen internal combustion engine, a separation membrane is arranged in the gas separator, and the gas purifier is communicated with the cooler. The separation membrane is used for separating hydrogen in the gas in the gas separator from other gases; and the gas purifier is communicated with the gas separator and is used for collecting the hydrogen discharged by the gas separator and carrying out adsorption and desorption treatment on the hydrogen. Hydrogen is recycled and purified through the gas separator and the gas purifier, the temperature of the hydrogen is reduced to be close to the environment temperature through the cooler, meanwhile, the humidity of the hydrogen is reduced, the situation that follow-up hydrogen compression and other treatment are affected due to the fact that the heat energy of the hydrogen is too high is prevented, and the cooled hydrogen is compressed by the compressor and stored in the hydrogen storage tank; therefore, the hydrogen storage device is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen tail gas recovery, in particular to a hydrogen tail gas recovery and purification device. Background Technique

[0002] At present, the domestic hydrogen internal combustion engine and diesel internal combustion engine have basically the same working principle except for different chemical reactions. There is incompleteness in the process of hydrogen combustion and work in the hydrogen internal combustion engine, and the remaining hydrogen will be directly discharged along with the tail gas. There is a great waste of energy in long-term use. Therefore, it is very necessary to recover and purify the hydrogen in the tail gas.

[0003] The invention with the publication number of CN101234749A proposes a tail gas recovery device for hydrogen. By using this tail gas recovery device, the product gas regenerated hydrogen generated in the process of generating product hydrogen can be recovered, so as to achieve the purpose of energy conservation and avoiding waste. The tail gas recovery device includes a connector, a connecting pipe, a nozzle and a connecting seat. The front end and the rear end of the connecting pipe are respectively connected with the connecting seat and the connector; the nozzle is connected to the rear end of the connecting seat, and a part of the nozzle is cooperatively placed in the gas channel arranged on the connecting seat. However, the above-mentioned tail gas recovery device for hydrogen cannot recover and purify the hydrogen in the tail gas generated by the combustion of the hydrogen internal combustion engine. Therefore, the present application proposes a hydrogen tail gas recovery and purification device to solve the above problems. Content of the Utility Model

[0004] In view of this, the utility model proposes a hydrogen tail gas recovery and purification device, which completes the recovery and purification treatment of hydrogen through a gas separator and a gas purifier, and cools it to a temperature close to the ambient temperature through a cooler, while reducing its humidity, so as to prevent the hydrogen heat energy from being too high and affecting subsequent hydrogen compression and other treatments. The cooled hydrogen is compressed by a compressor and stored inside a hydrogen storage tank, thus completing the storage treatment of hydrogen for convenient use.

[0005] The technical solution of the utility model is realized as follows: The utility model provides a hydrogen tail gas recovery and purification device, including a gas separator, a gas purifier, a cooler, a compressor and a hydrogen storage tank, wherein,

[0006] The gas separator is communicated with the hydrogen internal combustion engine and is used for collecting the gas generated by the hydrogen internal combustion engine. A separation membrane is arranged inside the gas separator, and the separation membrane is used for separating hydrogen from other gases in the gas in the gas separator;

[0007] The gas purifier is communicated with the gas separator and is used for collecting the hydrogen discharged by the gas separator and performing adsorption and desorption treatments on the hydrogen;

[0008] The cooler is communicated with the gas purifier and is used for cooling the hydrogen discharged from the gas purifier;

[0009] A compressor, which is connected to the cooler and is used to compress the hydrogen discharged from the cooler;

[0010] A hydrogen storage tank, which is used to store the hydrogen discharged from the compressor.

[0011] Based on the above technical solutions, preferably, the separation membrane is a polysulfone resin membrane.

[0012] Based on the above technical solutions, preferably, an exhaust pipe and a hydrogen discharge pipe are further connected to the gas separator. The exhaust pipe is used to discharge other gases to the external atmosphere, and the hydrogen discharge pipe is connected to the gas purifier.

[0013] Based on the above technical solutions, preferably, the hydrogen discharge pipe is connected to the gas separator through a first booster fan, the exhaust pipe is connected to the gas separator through an exhaust fan, and the power of the first booster fan is greater than that of the exhaust fan.

[0014] Based on the above technical solutions, preferably, a multi-walled carbon nanotube-based material is arranged inside the gas purifier, and the multi-walled carbon nanotube-based material is used to adsorb hydrogen.

[0015] Based on the above technical solutions, preferably, the gas purifier further includes a heater connected to the multi-walled carbon nanotube-based material and a temperature control system electrically connected to the heater. The heater is used to heat the multi-walled carbon nanotube-based material, and the temperature control system is used to program-control the heating of the heater.

[0016] Based on the above technical solutions, preferably, the gas purifier is connected to the cooler through a first connecting pipeline, and the hydrogen discharge pipe is connected below the gas purifier, and the first connecting pipeline is connected above the gas purifier.

[0017] Based on the above technical solutions, preferably, the cooler includes a mounting frame, a cooling coil and a second booster fan, wherein,

[0018] The mounting frame is arranged on the transmission flow path of the cooler, and the cooling coil and the second booster fan are both arranged on the mounting frame. The cooling coil is used to cool hydrogen, and the second booster fan is used to transport hydrogen.

[0019] Based on the above technical solutions, preferably, the cooler further includes a heat exchanger, wherein,

[0020] The heat exchanger is connected to the cooling coil and is connected to the external bench cold water main pipe, and is used to transfer the heat of the cooling coil to the external bench cold water main pipe.

[0021] Based on the above technical solutions, preferably, it further includes a second connection pipeline and a third connection pipeline, where

[0022] The second connection pipeline is connected to the cooler and the compressor;

[0023] The third connection pipeline is connected to the compressor and the hydrogen storage tank. The third connection pipeline is connected below the hydrogen storage tank, and the hydrogen storage tank is a high-strength low-alloy steel tank.

[0024] The hydrogen tail gas recovery and purification device of the present utility model has the following beneficial effects compared with the prior art:

[0025] (1) The recovery and purification of hydrogen are completed through the gas separator and the gas purifier. The temperature is reduced to near the ambient temperature through the cooler, and at the same time, its humidity is reduced to prevent the hydrogen thermal energy from being too high and affecting subsequent hydrogen compression and other processes. The cooled hydrogen is compressed by the compressor and stored inside the hydrogen storage tank, thus completing the storage process of hydrogen for convenient use.

[0026] (2) By setting the hydrogen discharge pipe to be connected to the hydrogen internal combustion engine through the first booster fan. In specific implementation, the first booster fan can generate strong power for the air flow, so that hydrogen can smoothly pass through the separation membrane and be extracted by the hydrogen discharge pipe, while other gases that do not pass through the separation membrane are directly discharged from the exhaust pipe under the action of the exhaust fan, thus facilitating the separation and recovery of hydrogen in the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of the structural connection mode of the hydrogen tail gas recovery and purification device of the present utility model;

[0029] Figure 2 It is a schematic diagram of the connection mode of the structure at the gas separator of the hydrogen tail gas recovery and purification device of the present utility model;

[0030] Figure 3 It is a schematic diagram of the connection mode of the structure at the cooler of the hydrogen tail gas recovery and purification device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present utility model.

[0032] As Figures 1 to 3 shown, the hydrogen tail gas recovery and purification device of the present utility model includes a gas separator 1, a gas purifier 2, a cooler 3, a compressor 4, and a hydrogen storage tank 5. Among them, the gas separator 1 is connected to the hydrogen internal combustion engine 10 and is used to collect the gas generated by the hydrogen internal combustion engine 10. A separation membrane 11 is provided inside the gas separator 1, and the separation membrane 11 is used to separate hydrogen from other gases in the gas in the gas separator 1; the gas purifier 2 is connected to the gas separator 1 and is used to collect the hydrogen discharged from the gas separator 1 and perform adsorption and desorption treatment on the hydrogen; the cooler 3 is connected to the gas purifier 2 and is used to cool the hydrogen discharged from the gas purifier 2; the compressor 4 is connected to the cooler 3 and is used to compress the hydrogen discharged from the cooler 3; the hydrogen storage tank 5 is used to store the hydrogen discharged from the compressor 4.

[0033] In specific implementation, the exhaust gas burned from the hydrogen internal combustion engine 10 is discharged into the gas separator 1. At this time, the separation membrane 11 provided in the gas separator 1 separates hydrogen from other gases in the exhaust gas by means of membrane separation. The separated hydrogen is discharged into the gas purifier 2, and the gas purifier 2 performs adsorption and desorption on the hydrogen, thereby completing the purification treatment of the hydrogen. The purified hydrogen is then discharged into the cooler 3, and the cooler 3 performs a cooling treatment to reduce its temperature to near the ambient temperature and at the same time reduce its humidity to prevent the hydrogen heat energy from being too high and affecting subsequent hydrogen compression and other treatments. The cooled hydrogen is discharged into the interior of the compressor 4 and compressed to reach the storage pressure of the hydrogen storage tank 5. Finally, the compressed hydrogen is discharged into the interior of the hydrogen storage tank 5 for storage, thereby completing the purification and recovery treatment of the hydrogen in the exhaust gas discharged from the hydrogen internal combustion engine 10, which is convenient for use.

[0034] As a preferred embodiment, the separation membrane 11 is a polysulfone resin membrane.

[0035] With this design, the polysulfone resin membrane has a relatively high permeability to small hydrogen molecules compared to other gases such as carbon dioxide and nitrogen, and can effectively achieve gas separation. At the same time, since the exhaust gas discharged from the hydrogen internal combustion engine 10 is directly discharged into the gas separator 1, the exhaust gas temperature is relatively high, and the polysulfone resin has good high-temperature resistance and can maintain its structural stability within a certain temperature range.

[0036] As a preferred embodiment, an exhaust pipe 12 and a hydrogen discharge pipe 13 are also connected to the gas separator 1. The exhaust pipe 12 is used to discharge other gases into the external atmosphere, and the hydrogen discharge pipe 13 is connected to the gas purifier 2.

[0037] The hydrogen discharge pipe 13 is connected to the gas separator 1 through a first booster fan 14, and the exhaust pipe 12 is connected to the gas separator 1 through an exhaust fan 15, and the power of the first booster fan 14 is greater than that of the exhaust fan 15.

[0038] With such a design, specifically when separating hydrogen and other gases in the tail gas, hydrogen and other gases are mainly distributed on both sides of the separation membrane 11. By setting the hydrogen discharge pipe 13 to be connected to the hydrogen internal combustion engine 10 through the first booster fan 14, in specific implementation, the first booster fan 14 can generate strong power for the air flow, so that hydrogen can smoothly pass through the separation membrane 11 and be extracted by the hydrogen discharge pipe 13, while other gases that do not pass through the separation membrane 11 are directly discharged from the exhaust pipe 12 under the action of the exhaust fan 15, thus facilitating the separation and recovery treatment of hydrogen in the tail gas.

[0039] As a preferred embodiment, a multi-walled carbon nanotube-based material is provided inside the gas purifier 2, and the multi-walled carbon nanotube-based material is used to adsorb hydrogen.

[0040] In specific implementation, the adsorption process of multi-walled carbon nanotubes includes the interaction between hydrogen molecules and the surface of carbon nanotubes, and hydrogen molecules are adsorbed onto the surface of carbon nanotubes through van der Waals forces. At the same time, the microstructure of multi-walled carbon nanotubes provides abundant pores, which not only increase the specific surface area but also provide better hydrogen adsorption capacity.

[0041] As a preferred embodiment, the gas purifier 2 further includes a heater connected to the multi-walled carbon nanotube-based material, and a temperature control system electrically connected to the heater. The heater is used to heat the multi-walled carbon nanotube-based material, and the temperature control system is used to program-control the heating of the heater.

[0042] Specifically when desorbing and purifying the adsorbed hydrogen, the heater is heated by program-control of the temperature control system, and the heater heats the multi-walled carbon nanotube-based material, thereby completing the desorption treatment of hydrogen.

[0043] As a preferred embodiment, the gas purifier 2 is connected to the cooler 3 through a first connecting pipeline 61, and the hydrogen discharge pipe 13 is connected below the gas purifier 2, and the first connecting pipeline 61 is connected above the gas purifier 2.

[0044] With such a design, since the molecular weight of hydrogen gas is relatively light, connecting the hydrogen discharge pipe 13 below the gas purifier 2 allows hydrogen molecules to be fully adsorbed on the surface of the multi-walled carbon nanotube-based material. By setting the first connecting pipeline 61 above the gas purifier 2, the desorbed hydrogen can be fully discharged from the first connecting pipeline 61.

[0045] As a preferred embodiment, the cooler 3 includes a mounting frame 31, a cooling coil 32, and a second booster fan 33. Among them, the mounting frame 31 is arranged on the transmission flow path of the cooler 3, and both the cooling coil 32 and the second booster fan 33 are arranged on the mounting frame 31. The cooling coil 32 is used to cool hydrogen gas, and the second booster fan 33 is used to transport hydrogen gas.

[0046] The cooler 3 further includes a heat exchanger 34. Among them, the heat exchanger 34 is communicated with the cooling coil 32 and is communicated with the external bench cold water main pipe, and is used to transfer the heat of the cooling coil 32 to the external bench cold water main pipe.

[0047] In specific implementation, when hydrogen gas flows into the interior of the cooler 3, the second booster fan 33 provides power for the gas flow. When hydrogen gas flows through the cooling coil 32, the cooling coil 32 can absorb the heat carried by the hydrogen gas, thereby completing the cooling process of the hydrogen gas. The heat exchanger 34 transfers the heat absorbed by the cooling coil 32 to the external bench cold water main pipe, so that the cooling coil 32 can continuously cool the hydrogen gas.

[0048] As a preferred embodiment, it further includes a second connecting pipeline 62 and a third connecting pipeline 63. Among them, the second connecting pipeline 62 is communicated with the cooler 3 and the compressor 4; the third connecting pipeline 63 is communicated with the compressor 4 and the hydrogen storage tank 5. The third connecting pipeline 63 is connected below the hydrogen storage tank 5, and the hydrogen storage tank 5 is a high-strength low-alloy steel tank.

[0049] The working principle of the present invention is introduced as follows:

[0050] The gas separator 1 recovers the exhaust gas generated by the hydrogen internal combustion engine 10, and separates hydrogen gas from other gases through the separation membrane 11 arranged inside the gas separator 1. The separated hydrogen gas is discharged into the interior of the gas purifier 2 through the hydrogen discharge pipe 13 and is adsorbed by the multi-walled carbon nanotube-based material in the gas purifier 2. After the adsorption is completed, the multi-walled carbon nanotube-based material is heated by a program to complete the desorption and purification treatment of hydrogen gas. The purified hydrogen gas is discharged into the interior of the cooler 3 through the first connecting pipeline 61 and is cooled by the cooling coil 32 to reduce its temperature to the ambient temperature. The cooled hydrogen gas is discharged into the interior of the compressor 4 and compressed. The compressed hydrogen gas is stored in the interior of the hydrogen storage tank 5, thereby completing the purification and recovery treatment of hydrogen gas in the exhaust gas.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hydrogen tail gas recovery and purification device, characterized in that: It includes a gas separator (1), a gas purifier (2), a cooler (3), a compressor (4) and a hydrogen storage tank (5). Among them, The gas separator (1) is connected to a hydrogen internal combustion engine (10) and is used to collect the gas generated by the hydrogen internal combustion engine (10). A separation membrane (11) is provided inside the gas separator (1), and the separation membrane (11) is used to separate hydrogen from other gases in the gas inside the gas separator (1); The gas purifier (2) is connected to the gas separator (1) and is used to collect the hydrogen discharged from the gas separator (1) and perform adsorption and desorption treatment on the hydrogen; The cooler (3) is connected to the gas purifier (2) and is used to cool the hydrogen discharged from the gas purifier (2); The compressor (4) is connected to the cooler (3) and is used to compress the hydrogen discharged from the cooler (3); The hydrogen storage tank (5) is used to store the hydrogen discharged from the compressor (4).

2. The hydrogen tail gas recovery and purification device according to claim 1, characterized in that: The separation membrane (11) is a polysulfone resin membrane.

3. The hydrogen tail gas recovery and purification device according to claim 1, characterized in that: An exhaust pipe (12) and a hydrogen discharge pipe (13) are also connected to the gas separator (1). The exhaust pipe (12) is used to discharge other gases into the external atmosphere, and the hydrogen discharge pipe (13) is connected to the gas purifier (2).

4. The hydrogen tail gas recovery and purification device according to claim 3, characterized in that: The hydrogen discharge pipe (13) is connected to the gas separator (1) through a first booster fan (14), and the exhaust pipe (12) is connected to the gas separator (1) through an exhaust fan (15), and the power of the first booster fan (14) is greater than the power of the exhaust fan (15).

5. The hydrogen tail gas recovery and purification device according to claim 3, wherein: A multi-walled carbon nanotube-based material is provided inside the gas purifier (2), and the multi-walled carbon nanotube-based material is used to adsorb hydrogen.

6. The hydrogen tail gas recovery and purification device according to claim 5, wherein: The gas purifier (2) further includes a heater connected to the multi-walled carbon nanotube-based material and a temperature control system electrically connected to the heater. The heater is used to heat the multi-walled carbon nanotube-based material, and the temperature control system is used to program-control the heating of the heater.

7. The hydrogen tail gas recovery and purification device according to claim 6, characterized in that: The gas purifier (2) is connected to the cooler (3) through a first connecting pipe (61), and the hydrogen discharge pipe (13) is connected below the gas purifier (2), and the first connecting pipe (61) is connected above the gas purifier (2).

8. The hydrogen tail gas recovery and purification device according to claim 1, characterized in that: The cooler (3) includes a mounting frame (31), a cooling coil (32) and a second booster fan (33). Among them, The mounting frame (31) is provided on the transmission flow path of the cooler (3), and both the cooling coil (32) and the second booster fan (33) are provided on the mounting frame (31). The cooling coil (32) is used to cool hydrogen, and the second booster fan (33) is used to transmit hydrogen.

9. The hydrogen tail gas recovery and purification device according to claim 8, wherein: The cooler (3) further includes a heat exchanger (34). Among them, The heat exchanger (34) is connected to the cooling coil (32) and is connected to the external bench cold water main pipe, and is used to transfer the heat of the cooling coil (32) to the external bench cold water main pipe.

10. The hydrogen tail gas recovery and purification device according to claim 8, characterized in that: It further includes a second connecting pipe (62) and a third connecting pipe (63). Among them, The second connecting pipeline (62) is communicated with the cooler (3) and the compressor (4); The third connecting pipeline (63) is communicated with the compressor (4) and the hydrogen storage tank (5). The third connecting pipeline (63) is communicated below the hydrogen storage tank (5), and the hydrogen storage tank (5) is a high-strength low-alloy steel tank.

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