Novel ethanol low-temperature reforming hydrogen production device

Abstract

The utility model discloses a novel ethanol low-temperature reforming hydrogen production device which comprises a reaction chamber fixed on a support table, a hydrogen discharge port arranged at the top of the reaction chamber, and a tail gas discharge port arranged at one end of the reaction chamber; the hydrogen evolution membrane is fixed in the reaction chamber; one end of the evaporation chamber communicates with the reaction chamber, a liquid inlet is formed in the other end of the evaporation chamber, and a tail gas inlet and a tail gas outlet are formed in the side face of the evaporation chamber; the carrier plates are arranged in the reaction chamber at equal intervals, the carrier plates are located in the hydrogen evolution film, each carrier plate comprises a first partition plate and a second partition plate, a supporting frame is arranged between each first partition plate and the corresponding second partition plate, and a plurality of through holes are formed in each first partition plate and the corresponding second partition plate in an array mode; the evaporation assembly is mounted in the evaporation chamber, and an outlet of the evaporation assembly is communicated with the reaction chamber. Due to the special design of the carrier plate, gas circulation and catalyst distribution are optimized, and the efficiency of reforming reaction and the yield of hydrogen are improved.

Description

Technical Field

[0001] This utility model relates to the field of ethanol low-temperature reforming hydrogen production technology, and in particular to a novel ethanol low-temperature reforming hydrogen production device. Background Technology

[0002] To alleviate energy shortages and reduce environmental pollution, finding alternative energy sources and reducing harmful emissions have become two important topics in the field of internal combustion engine research. Hydrogen, with its diverse sources, renewable nature, and clean and environmentally friendly characteristics, has become a research hotspot in the current new energy field. Numerous studies have shown that hydrogen has a faster diffusion and flame propagation speed than other fuels, a higher octane rating, a wider flammability limit, and a lower ignition energy. Therefore, blending hydrogen into fuel facilitates lean combustion, which can significantly improve the performance and emissions of internal combustion engines, thereby reducing emissions of harmful substances such as NOx and HC. Existing experimental and theoretical studies of hydrogen-blended engines have demonstrated the broad application prospects of hydrogen-blended fuels in engines. However, issues such as hydrogen acquisition methods and storage and transportation technologies have hindered the development of hydrogen-blended engines. While hydrogen-blended engines are difficult to promote in practice, if inexpensive and renewable bioethanol can be used instead of hydrogen for onboard transport, and the waste heat from engine exhaust can be used to reform the bioethanol into hydrogen for real-time hydrogen supply to the car engine, it will undoubtedly provide new ideas and directions for the market promotion of hydrogen-blended combustion engines. At the same time, on-board online hydrogen production eliminates the need for hydrogen storage and transportation, making the application and promotion of hydrogen fuel in engines possible. The reformed gas produced by catalyzing aqueous ethanol using waste heat from the car engine is rich in H2, CH4, and CO, etc. This reformed gas is very suitable for engine combustion and can be used directly without any purification treatment. Blending hydrogen into the car engine can broaden the combustion limits, accelerate the fuel combustion rate, achieve stable ultra-lean combustion, and thus improve engine combustion performance.

[0003] Application CNCN205668941 U discloses an ethanol reformer for producing hydrogen using waste heat from engine exhaust. This device utilizes the waste heat of a car engine to reform aqueous ethanol into hydrogen-rich gas through a two-stage catalytic process. The hydrogen-rich gas is then introduced into the car engine for combustion with fuel. The device and application system utilize a two-stage honeycomb titanium mesh structure to generate a large catalyst contact surface area, which is beneficial for the miniaturization of the reforming hydrogen production device and makes on-board hydrogen production possible. The two-stage catalytic structure achieves synergistic effects between the catalysts, solving the problems of low ethanol conversion efficiency and low hydrogen selectivity when using a single catalyst. Under low-temperature conditions, the synergistic effect of the alkaline catalyst solves the problems of catalyst sintering and carbon deposition, improving catalyst lifespan. However, this device first sprays an aqueous ethanol solution into the evaporation chamber, then heats the aqueous ethanol solution into aqueous ethanol vapor using car exhaust. The aqueous ethanol vapor then reacts with the catalyst to produce hydrogen. However, the evaporation time of the aqueous ethanol solution is short, and the ethanol vapor flows a short distance in the shell side, resulting in a short residence time, which to some extent shortens the reaction time and reduces the reforming rate.

[0004] Based on the above-mentioned technical problems, this utility model provides a novel ethanol low-temperature reforming hydrogen production device. Utility Model Content

[0005] The purpose of this invention is to provide a novel ethanol low-temperature reforming hydrogen production device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a novel ethanol low-temperature reforming hydrogen production apparatus, comprising:

[0007] The reaction chamber is fixed on a support platform, and a hydrogen exhaust port is provided at the top of the reaction chamber. A tail gas exhaust port is installed at one end of the reaction chamber.

[0008] A hydrogen evolution membrane, wherein the hydrogen evolution membrane has a cylindrical structure, the hydrogen evolution membrane is fixed in the reaction chamber, and is provided and spaced apart from the inner wall of the reaction chamber;

[0009] An evaporation chamber, one end of which is connected to the reaction chamber, and a liquid inlet is provided at the other end of the evaporation chamber. A tail gas inlet and a tail gas outlet are provided on the side of the evaporation chamber.

[0010] A carrier plate is provided, wherein several groups of carrier plates are equally spaced in the reaction chamber and the carrier plates are located inside the hydrogen evolution membrane. The carrier plate includes a first partition and a second partition, with a gap between the first partition and the second partition. A support frame is provided between the first partition and the second partition. Several through holes are arrayed on the first partition and the second partition respectively, and the through holes on the first partition and the through holes on the second partition are staggered. The outer walls of the first partition and the second partition are both in contact with the inner wall of the hydrogen evolution membrane.

[0011] An evaporation assembly is installed in the evaporation chamber. An ethanol solution enters the evaporation assembly through the inlet, and the outlet of the evaporation assembly is connected to the reaction chamber.

[0012] According to the novel ethanol low-temperature reforming hydrogen production device provided by this utility model, the evaporation assembly includes two opposing sealing plates, both of which are fixedly connected to the evaporation chamber. A plurality of spiral tubes are arranged between the two sealing plates, and the spiral tubes are coaxially arranged with the sealing plates. The plurality of spiral tubes are arranged in a circumferential array between the two sealing plates. The sealing plates are respectively provided with perforations, and the two ends of the spiral tubes pass through the perforations respectively. There is a gap between adjacent spiral tubes. The tail gas inlet and tail gas outlet are both located between the two sealing plates, and a gap is provided between one of the sealing plates and the liquid inlet.

[0013] According to the novel ethanol low-temperature reforming hydrogen production device provided by this utility model, the front and rear ends of the reaction chamber are respectively detachably connected to support plates. The support plates are coaxially arranged with the reaction chamber. Several through holes are opened on the support plates. The two support plates are fixedly connected to a support shaft. The first partition and the second partition are both coaxially fixed on the support shaft.

[0014] According to the novel ethanol low-temperature reforming hydrogen production device provided by this utility model, annular mounting frames are fixed at both ends of the hydrogen evolution membrane, and the annular mounting frames are detachably connected to the support plate.

[0015] According to the novel ethanol low-temperature reforming hydrogen production device provided by this utility model, the hydrogen emission port and the tail gas emission port are respectively equipped with emission pipes, and the emission pipes are equipped with control valves.

[0016] According to the novel ethanol low-temperature reforming hydrogen production device provided by this utility model, the spiral tube is configured with a tapered structure along the gas inlet direction.

[0017] According to the novel ethanol low-temperature reforming hydrogen production apparatus provided by this utility model, temperature sensors are installed in both the evaporation chamber and the reaction chamber.

[0018] The present invention discloses the following technical effects:

[0019] In operation, an ethanol solution is injected into the evaporation assembly through the inlet of the evaporation chamber. The evaporation assembly heats and evaporates the ethanol solution, converting it into ethanol vapor. The evaporated ethanol vapor enters the reaction chamber through the outlet of the evaporation assembly. Inside the reaction chamber, the ethanol vapor comes into contact with the catalyst (coated on a support plate), undergoing a low-temperature reforming reaction. Under the action of the catalyst, the ethanol vapor undergoes a reforming reaction, generating hydrogen and other tail gas components. The hydrogen evolution membrane, as a key component, with its cylindrical structure and spaced design against the inner wall of the reaction chamber, facilitates the effective separation and emission of hydrogen. Hydrogen permeates through the hydrogen evolution membrane to the top of the reaction chamber and exits through the hydrogen emission port. The tail gas generated during the reaction is discharged through the tail gas emission port at one end of the reaction chamber. Simultaneously, the tail gas inlet and outlet on the side of the evaporation chamber can be designed for recycling or further treatment of the tail gas, improving system efficiency and environmental friendliness. The first and second partitions, along with their staggered through-hole design, provide a good gas flow path and catalyst support structure. This design facilitates sufficient contact between the ethanol vapor and the catalyst, improving the efficiency of the reforming reaction and the yield of hydrogen.

[0020] The effective separation function of the hydrogen evolution membrane in this invention enables hydrogen to be efficiently discharged from the reaction chamber, thereby improving the yield and purity of hydrogen.

[0021] The special design of the carrier plate in this invention optimizes gas flow and catalyst distribution, thereby improving the efficiency of the reforming reaction and the yield of hydrogen. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the ethanol low-temperature reforming hydrogen production device of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the reaction chamber of this utility model;

[0025] Figure 3 This is a schematic diagram of the evaporation assembly of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the carrier plate of this utility model.

[0027] The components are as follows: 1. Reaction chamber; 2. Support platform; 3. Hydrogen emission port; 4. Tail gas emission port; 5. Evaporation chamber; 6. Liquid inlet; 7. First partition; 8. Second partition; 9. Support frame; 10. Sealing plate; 11. Spiral tube; 12. Support plate; 13. Through hole; 14. Support shaft; 15. Hydrogen evolution membrane. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-4 This utility model provides a novel ethanol low-temperature reforming hydrogen production apparatus, comprising:

[0031] The reaction chamber 1 is fixed on the support platform 2. The top of the reaction chamber 1 is provided with a hydrogen exhaust port 3, and one end of the reaction chamber 1 is provided with a tail gas exhaust port 4.

[0032] Hydrogen evolution membrane 15, which has a cylindrical structure, is fixed inside the reaction chamber 1 and is separated from the inner wall of the reaction chamber 1.

[0033] Evaporation chamber 5, one end of which is connected to reaction chamber 1, and the other end of evaporation chamber 5 is provided with liquid inlet 6. Evaporation chamber 5 is provided with tail gas inlet and tail gas outlet on the side.

[0034] The carrier plate is arranged in several groups at equal intervals in the reaction chamber 1 and is located inside the hydrogen evolution membrane 15. The carrier plate includes a first partition 7 and a second partition 8. There is a gap between the first partition 7 and the second partition 8. A support frame 9 is provided between the first partition 7 and the second partition 8. Several through holes are arrayed on the first partition 7 and the second partition 8 respectively. The through holes on the first partition 7 and the second partition 8 are staggered. The outer wall of the first partition 7 and the outer wall of the second partition 8 are both in contact with the inner wall of the hydrogen evolution membrane 15.

[0035] An evaporation assembly is installed inside the evaporation chamber 5. The ethanol solution enters the evaporation assembly through the inlet 6, and the outlet of the evaporation assembly is connected to the reaction chamber 1.

[0036] In operation, an ethanol solution is injected into the evaporation assembly through the inlet 6 of the evaporation chamber 5. The evaporation assembly heats and evaporates the ethanol solution, converting it into ethanol vapor. The evaporated ethanol vapor enters the reaction chamber 1 through the outlet of the evaporation assembly. Inside the reaction chamber 1, the ethanol vapor comes into contact with the catalyst (coated on a carrier plate) and undergoes a low-temperature reforming reaction. Under the action of the catalyst, the ethanol vapor undergoes a reforming reaction, generating hydrogen and other exhaust gas components. The hydrogen evolution membrane 15, as a key component, with its cylindrical structure and spacing design from the inner wall of the reaction chamber 1, facilitates the effective separation and emission of hydrogen. Hydrogen permeates through the hydrogen evolution membrane 15 to the top of the reaction chamber 1 and is discharged from the hydrogen emission port 3. The exhaust gas generated during the reaction is discharged through the exhaust gas emission port 4 at one end of the reaction chamber 1. Simultaneously, the exhaust gas inlet and outlet on the side of the evaporation chamber 5 can be designed for recycling or further treatment of the exhaust gas to improve system efficiency and environmental friendliness. The first partition 7 and the second partition 8, along with their staggered through-hole design, provide a good gas flow path and catalyst support structure. This design facilitates sufficient contact between ethanol vapor and the catalyst, improving the efficiency of the reforming reaction and the yield of hydrogen.

[0037] The effective separation function of the hydrogen evolution membrane 15 in this invention enables hydrogen to be efficiently discharged from the reaction chamber 1, thereby improving the yield and purity of hydrogen.

[0038] The special design of the carrier plate in this invention optimizes gas flow and catalyst distribution, thereby improving the efficiency of the reforming reaction and the yield of hydrogen.

[0039] The scheme is further optimized. The evaporation assembly includes two sealing plates 10 arranged opposite each other. Both sealing plates 10 are fixedly connected in the evaporation chamber 5. Several sets of spiral tubes 11 are arranged between the two sealing plates 10. The spiral tubes 11 are coaxially arranged with the sealing plates 10. The several sets of spiral tubes 11 are arranged in a circumferential array between the two sealing plates 10. The sealing plates 10 are respectively provided with perforations. The two ends of the spiral tubes 11 pass through the perforations respectively. There is a gap between adjacent spiral tubes 11. The exhaust gas inlet and exhaust gas outlet are both located between the two sealing plates 10. There is a gap between one sealing plate 10 and the liquid inlet 6.

[0040] In a further optimized design, support plates 12 are detachably connected to the front and rear ends of the reaction chamber 1. The support plates 12 are coaxially arranged with the reaction chamber 1. Several through holes 13 are provided on the support plates 12. The two support plates 12 are fixedly connected to a support shaft 14. The first partition 7 and the second partition 8 are both coaxially fixed on the support shaft 14.

[0041] The design is further optimized by fixing annular mounting brackets at both ends of the hydrogen evolution membrane 15, which are detachably connected to the support plate 12.

[0042] The design was further optimized by installing emission pipes on hydrogen emission port 3 and exhaust gas emission port 4, with control valves installed on the emission pipes.

[0043] The design was further optimized by setting the spiral tube 11 to a tapered structure along the air intake direction.

[0044] The design was further optimized by installing temperature sensors in both the evaporation chamber 5 and the reaction chamber 1.

[0045] The ethanol solution enters the evaporation chamber 5 through the inlet 6 and flows into the spiral tube 11.

[0046] The spiral tube 11 is heated in the evaporation chamber 5, and the ethanol solution gradually evaporates into ethanol vapor in the spiral tube 11.

[0047] The tapered spiral tube 11 structure accelerates the flow rate of ethanol vapor and improves evaporation efficiency.

[0048] The evaporated ethanol vapor enters the reaction chamber 1 through the outlet of the spiral tube 11.

[0049] Ethanol vapor comes into contact with the catalyst on the support plate in reaction chamber 1, undergoing a low-temperature reforming reaction to produce hydrogen and other tail gas components.

[0050] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel ethanol low-temperature reforming hydrogen production apparatus, characterized in that, include: The reaction chamber (1) is fixed on the support platform (2), and a hydrogen exhaust port (3) is opened on the top of the reaction chamber (1). A tail gas exhaust port (4) is installed at one end of the reaction chamber (1). Hydrogen evolution membrane (15), the hydrogen evolution membrane (15) is a cylindrical structure, the hydrogen evolution membrane (15) is fixed in the reaction chamber (1), and is provided and spaced apart from the inner wall of the reaction chamber (1); Evaporation chamber (5), one end of which is connected to the reaction chamber (1), and the other end of which is provided with a liquid inlet (6). The side of the evaporation chamber (5) is provided with a tail gas inlet and a tail gas outlet. The carrier plate is arranged in several groups at equal intervals in the reaction chamber (1) and is located in the hydrogen evolution membrane (15). The carrier plate includes a first partition (7) and a second partition (8). There is a gap between the first partition (7) and the second partition (8). A support frame (9) is provided between the first partition (7) and the second partition (8). Several through holes are arrayed on the first partition (7) and the second partition (8), and the through holes on the first partition (7) and the through holes on the second partition (8) are staggered. The outer wall of the first partition (7) and the outer wall of the second partition (8) are both in contact with the inner wall of the hydrogen evolution membrane (15). An evaporation assembly is installed inside the evaporation chamber (5). Ethanol solution enters the evaporation assembly through the inlet (6). The outlet of the evaporation assembly is connected to the reaction chamber (1).

2. The novel ethanol low-temperature reforming hydrogen production apparatus according to claim 1, characterized in that: The evaporation assembly includes two opposing sealing plates (10), both of which are fixedly connected to the evaporation chamber (5). A plurality of spiral tubes (11) are arranged between the two sealing plates (10), and the spiral tubes (11) are coaxially arranged with the sealing plates (10). The plurality of spiral tubes (11) are arranged in a circumferential array between the two sealing plates (10). The sealing plates (10) are respectively provided with perforations, and the two ends of the spiral tubes (11) pass through the perforations respectively. There is a gap between adjacent spiral tubes (11). The exhaust gas inlet and exhaust gas outlet are both located between the two sealing plates (10), and there is a gap between one of the sealing plates (10) and the liquid inlet (6).

3. The novel ethanol low-temperature reforming hydrogen production apparatus according to claim 1, characterized in that: The reaction chamber (1) is detachably connected to the front and rear ends of the reaction chamber (1) and the support plate (12) is coaxially arranged with the reaction chamber (1). The support plate (12) has several through holes (13). The two support plates (12) are fixedly connected to a support shaft (14). The first partition (7) and the second partition (8) are both coaxially fixed on the support shaft (14).

4. A novel ethanol low-temperature reforming hydrogen production apparatus according to claim 3, characterized in that: The hydrogen evolution membrane (15) is fixed with annular mounting brackets at both ends, and the annular mounting brackets are detachably connected to the support plate (12).

5. A novel ethanol low-temperature reforming hydrogen production apparatus according to claim 1, characterized in that: The hydrogen emission port (3) and the exhaust gas emission port (4) are respectively equipped with emission pipes, and control valves are installed on the emission pipes.

6. A novel ethanol low-temperature reforming hydrogen production apparatus according to claim 2, characterized in that: The spiral tube (11) is configured as a tapered structure along the air intake direction.

7. A novel ethanol low-temperature reforming hydrogen production apparatus according to claim 1, characterized in that: Temperature sensors are installed in both the evaporation chamber (5) and the reaction chamber (1).

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