Heating temperature control and regulation device of methanol reforming hydrogen production machine

Abstract

The utility model belongs to the field of hydrogen fuel automobiles, and particularly relates to a heating temperature control and regulation device of a methanol reforming hydrogen production machine, which comprises a hydrogen internal combustion engine, a high-temperature gas pipeline, the methanol reforming hydrogen production machine, a gas flow control valve, a waste gas heat exchange mechanism, a temperature sensor and the methanol reforming hydrogen production machine, the waste gas heat exchange mechanism and the temperature sensor are both arranged in the methanol reforming hydrogen production machine, the high-temperature gas pipeline comprises a main pipeline and a branch pipeline, an exhaust pipeline of the hydrogen internal combustion engine is communicated with the main pipeline, and the gas flow control valve and the waste gas heat exchange mechanism are sequentially arranged on the main pipeline. A gas inlet of the branch pipeline communicates with the main pipeline between the hydrogen internal combustion engine and the gas flow control valve, an exhaust port of the branch pipeline communicates with the main pipeline behind the waste gas heat exchange mechanism, and the gas flow control valve and the temperature sensor are both electrically connected with a vehicle control circuit. According to the utility model, the methanol reforming hydrogen production machine can be heated by using high-temperature tail gas, and the methanol reforming hydrogen production machine can be ensured to be at the optimal reaction rate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen fuel automobile field, concretely relates to a heating temperature control adjusting device of methanol reforming hydrogen generator. BACKGROUND

[0002] Methanol reforming hydrogen production is a process in which methanol and water vapor undergo chemical reactions in the presence of a catalyst to produce hydrogen and carbon dioxide. This process involves multiple chemical reaction steps, including methanol cracking, carbon monoxide shift reaction, etc., and finally separates high-purity hydrogen through pressure swing adsorption technology. Methanol reforming hydrogen production needs to be carried out at a high temperature, which can increase the reaction rate, but too high a temperature may cause the catalyst to deactivate.

[0003] Current methanol hydrogen production reactions are generally carried out on the ground. With the development of technology, some large new energy vehicles have begun to install methanol reforming hydrogen production equipment on the vehicle. For example, Chinese utility model patent CN112599816A, named "Methanol reforming hydrogen fuel cell commercial vehicle", discloses a methanol reforming hydrogen production system installed on the vehicle to increase the cruising range, meet the use requirements of large-tonnage vehicles, ensure the methanol reforming hydrogen production, and promote the hydrogen production reaction. However, these vehicles often need to install electric heating devices to promote the hydrogen production reaction, which not only increases the cost of hydrogen production, but also consumes the lithium battery power of the vehicle, increasing the consumption of electric power. Chinese utility model patent No. CN218539308U discloses a double-layer tail gas pipe heat exchange type methanol reformer, which heats the reformer sleeve pipe on the surface of the tail gas pipe to improve the utilization rate of the tail gas. However, this structure cannot control the reaction rate and cannot control the temperature of the reforming hydrogen production, which may cause the catalyst to deactivate.

[0004] Therefore, how to provide a temperature control adjusting device for methanol reforming hydrogen generator using exhaust gas heating of internal combustion engine has become a problem that needs to be considered by those skilled in the art. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model discloses a heating temperature control adjusting device for methanol reforming hydrogen generator. The utility model makes full use of the hot gas flow discharged by the hydrogen internal combustion engine to heat the methanol reforming hydrogen generator and controls the flow of the high-temperature gas discharged by the hydrogen internal combustion engine to ensure that the methanol reforming hydrogen generator is in the best reaction state.

[0006] Specifically, the present application discloses the following technical solutions:

[0007] The utility model provides a kind of heating temperature control adjusting device of methanol reforming hydrogen generator, including hydrogen internal combustion engine, high temperature gas pipeline, methanol reforming hydrogen generator, gas flow control valve, waste heat exchange mechanism, temperature sensor and methanol reforming hydrogen generator, the waste heat exchange mechanism and temperature sensor are arranged in methanol reforming hydrogen generator, the high temperature gas pipeline includes main pipeline and branch pipeline, the exhaust pipe of hydrogen internal combustion engine is connected with the gas inlet of main pipeline, the gas flow control valve, waste heat exchange mechanism are sequentially arranged on main pipeline, the gas inlet of branch pipeline is connected on the main pipeline between hydrogen internal combustion engine and gas flow control valve, the gas outlet of branch pipeline is connected on the main pipeline after waste heat exchange mechanism by tee joint, the gas flow control valve, temperature sensor are electrically connected with the control circuit of vehicle.

[0008] Further, it further includes gas pipeline fan, the gas pipeline fan is arranged on the branch pipeline of high temperature gas pipeline, and the gas pipeline fan is electrically connected with the control circuit of vehicle.

[0009] Further, it further includes check valve, which is arranged on the main pipeline between the waste heat exchange mechanism and the tee joint.

[0010] Further, it further includes exhaust aftertreatment device, the end of the main pipeline is connected with the exhaust port of vehicle, and the exhaust aftertreatment device is arranged on the main pipeline of high temperature gas pipeline and located between the tee joint and the exhaust port of vehicle.

[0011] Further, the waste heat exchange mechanism includes heat exchange pipeline, and the heat exchange pipeline is arranged in a serpentine shape.

[0012] Further, the surface of the heat exchange pipeline is provided with toothed heat dissipation fins along the pipeline.

[0013] The utility model has the advantages that: by the arrangement of the gas flow control valve, the gas pipeline fan and the high temperature gas pipeline, the methanol reforming hydrogen generator can be heated by the high-temperature exhaust gas discharged during the operation of the hydrogen internal combustion engine, so that the hydrogen can be quickly produced by the methanol reforming hydrogen generator to improve the endurance of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the main body structure schematic view of the utility model;

[0015] Figure 2 It is the pipeline structure schematic view of the waste heat exchange mechanism in the embodiment 2 of the utility model;

[0016] Figure 3 It is the front view of the heat exchange pipeline in the embodiment 2 of the utility model.

[0017] 1-hydrogen internal combustion engine, 2-methanol reforming hydrogen generator, 3-main pipeline, 4-branch pipeline, 5-three-way joint, 6-gas flow control valve, 7-gas pipeline fan, 8-exhaust gas aftertreatment device, 9-heat exchange pipeline, 10-toothed heat dissipation fin, 11-water collecting pipe, 12-water collecting box, 13-temperature sensor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Embodiment 1

[0020] Referring to the drawings, Figure 1 The embodiment discloses a methanol reforming hydrogen generator heating temperature control adjusting device, which comprises a hydrogen internal combustion engine 1, a high-temperature gas pipeline, a methanol reforming hydrogen generator 2, a gas flow control valve 6, an exhaust gas heat exchange mechanism, a gas pipeline fan 7, a temperature sensor 13 and the methanol reforming hydrogen generator 2.

[0021] The exhaust gas heat exchange mechanism and the temperature sensor 13 are installed in a reforming chamber of the methanol reforming hydrogen generator 2, the hydrogen internal combustion engine 1 is used for driving a generator to generate electricity, an exhaust pipe of the hydrogen internal combustion engine 1 is communicated with an air inlet of the high-temperature gas pipeline, a tail end of the high-temperature gas pipeline is communicated with an exhaust port of a vehicle, the high-temperature gas pipeline comprises a main pipeline 3 and a branch pipeline 4, the gas flow control valve 6 is arranged on the main pipeline 3 of the high-temperature gas pipeline, the gas flow control valve 6 and the exhaust gas heat exchange mechanism are sequentially arranged on the main pipeline 3, the gas pipeline fan 7 is arranged on the branch pipeline 4 of the high-temperature gas pipeline, an air inlet of the branch pipeline 4 is communicated on the main pipeline 3 between the hydrogen internal combustion engine 1 and the gas flow control valve 6, an exhaust port of the branch pipeline 4 is communicated on the main pipeline 3 behind the exhaust gas heat exchange mechanism through the three-way joint 5, a tail end of the main pipeline 3 is communicated with the exhaust port of the vehicle, and the gas flow control valve 6, the gas pipeline fan 7 and the temperature sensor 13 are all electrically connected with a control circuit of the vehicle.

[0022] As a preferred embodiment of the utility model, a check valve is further included, the check valve is arranged on the main pipeline 3 between the exhaust gas heat exchange mechanism and the three-way joint 5, and backflow of tail gas of the branch pipeline 4 is prevented.

[0023] As the preferred embodiment of the utility model, the exhaust gas post-processing device 8 is arranged at the end of the main pipeline 3 of the high-temperature gas pipeline, between the three-way joint 5 and the exhaust port of the vehicle, and is used for processing the exhaust gas discharged by the vehicle.

[0024] When the vehicle is started, the exhaust gas generated by the hydrogen internal combustion engine 1 is transported into the exhaust gas heat exchange mechanism in the methanol reforming hydrogen generator 2 through the high-temperature gas pipeline, the temperature sensor 13 monitors the temperature in the reforming chamber at all times and feeds back the result to the control circuit, the control circuit adjusts the opening degree of the gas flow control valve 6 after receiving the signal, and synchronously controls the rotating speed of the gas pipeline fan 7, the excess exhaust gas is guided to be discharged by the gas pipeline fan 7, the gasification temperature in the methanol reforming hydrogen generator 2 is controlled to be between 200-320 DEG C, and the methanol reforming hydrogen generator 2 is ensured to be in the optimal catalytic reaction rate.

[0025] Embodiment 2

[0026] Refer to the accompanying drawings Figures 2-3 The difference between the embodiment and embodiment 1 is that the embodiment discloses the structure of the exhaust gas heat exchange mechanism, the exhaust gas heat exchange mechanism in the embodiment comprises a heat exchange pipeline 9, the heat exchange pipeline 9 in the embodiment is arranged in a serpentine shape, the surface of the heat exchange pipeline 9 is provided with toothed heat dissipation fins 10 along the pipeline, the serpentine pipeline can improve the heat exchange capacity of the exhaust gas heat exchange mechanism without increasing the resistance of the gas, the toothed heat dissipation fins 10 increase the heat exchange area of the heat exchange pipeline 9, the toothed structure on the surface of the fins further enhances the air disturbance and improves the convective heat transfer coefficient, thereby accelerating the heat transfer speed and improving the heat transfer efficiency.

[0027] As the preferred embodiment of the utility model, the heat exchange pipeline 9 is arranged in an inclined manner, the bottom end of the heat exchange pipeline 9 is further connected with a vertically arranged water collecting pipe 11, and the water collecting pipe 11 is connected with a water collecting box 12, because a large amount of gaseous water is generated after the hydrogen internal combustion engine 1 is burned, and the gaseous water in the pipeline can be condensed due to temperature reduction when the exhaust gas heat exchange mechanism is performing heat exchange, therefore, the condensed water can flow downward along the heat exchange pipeline 9, and the water collecting box 12 can be used for collecting the condensed water in the heat exchange pipeline 9, so that the condensed water can be prevented from remaining in the exhaust pipeline.

[0028] The above is only the preferred embodiment of the utility model, and does not limit the technical range of the utility model, therefore, any slight modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment still belongs to the range of the technical scheme of the utility model.

Claims

1. A heating temperature control and regulation device for a methanol reforming hydrogen production machine, characterized in that: The application relates to a hydrogen internal combustion engine (1), a high-temperature gas pipeline, a methanol reforming hydrogen generator (2), a gas flow control valve (6), a waste gas heat exchange mechanism, a temperature sensor and the methanol reforming hydrogen generator (2), wherein the waste gas heat exchange mechanism and the temperature sensor (13) are arranged in the methanol reforming hydrogen generator (2), the high-temperature gas pipeline comprises a main pipeline (3) and a branch pipeline (4), an exhaust pipeline of the hydrogen internal combustion engine (1) is communicated with an air inlet of the main pipeline (3), the gas flow control valve (6) and the waste gas heat exchange mechanism are sequentially arranged on the main pipeline (3), an air inlet of the branch pipeline (4) is communicated on the main pipeline (3) between the hydrogen internal combustion engine (1) and the gas flow control valve (6), an exhaust outlet of the branch pipeline (4) is communicated on the main pipeline (3) behind the waste gas heat exchange mechanism through a three-way joint (5), and the gas flow control valve (6) and the temperature sensor are electrically connected with a control circuit of a vehicle.

2. The heating temperature control adjusting device of a methanol reforming hydrogen generator according to claim 1, characterized in that, The application further comprises a gas pipeline fan (7), the gas pipeline fan (7) is arranged on the branch pipeline (4) of the high-temperature gas pipeline, and the gas pipeline fan (7) is electrically connected with the control circuit of the vehicle.

3. The heating temperature control adjustment device of a methanol reformer hydrogen generator according to claim 1, wherein The application further comprises a check valve, the check valve is arranged on the main pipeline (3) between the waste gas heat exchange mechanism and the three-way joint (5).

4. The heating temperature control adjustment device of a methanol reformer hydrogen generator according to claim 1, wherein The application further comprises an exhaust aftertreatment device (8), an end of the main pipeline (3) is communicated with an exhaust outlet of the vehicle, and the exhaust aftertreatment device (8) is arranged on the main pipeline (3) of the high-temperature gas pipeline and located between the three-way joint (5) and the exhaust outlet of the vehicle.

5. The heating temperature control adjustment device of a methanol reformer hydrogen generator according to claim 1, wherein The waste gas heat exchange mechanism comprises a heat exchange pipeline (9), and the heat exchange pipeline (9) is arranged in a serpentine shape.

6. The heating temperature control adjustment device of a methanol reformer hydrogen generator according to claim 5, wherein The surface of the heat exchange pipeline (9) is provided with toothed heat dissipation fins (10) along the pipeline.

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