Rapid heat engine system of methanol engine

Abstract

The utility model discloses a methanol engine rapid heat engine system, which belongs to the technical field of methanol engines, and comprises a methanol engine, a methanol cracking reactor and a power battery, the methanol cracking reactor provides tail gas for methanol cracking reaction through an exhaust manifold; the power battery is used for providing electric energy for the methanol cracking reactor to heat the power battery and stops working after the exhaust manifold provides tail gas for the methanol cracking reactor. The tail gas generated when hydrogen is ignited by the methanol engine is introduced into the methanol cracking reactor, the high temperature of the tail gas is utilized to provide the required reaction temperature for methanol cracking, and the power battery stops supplying power, so that electric energy is not consumed any more, heat of the tail gas is utilized, the consumption of the electric energy is reduced, and the heat of the tail gas is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of methanol engines, in particular to a rapid warm-up system for methanol engines. Background Art

[0002] Existing methanol engines usually use fossil fuels such as gasoline, diesel, or natural gas as ignition fuels to solve the problem of difficult cold start of methanol engines. This method requires the vehicle to be filled with two fuels, methanol fuel and ignition fuel, at the same time, and two sets of fuel supply systems and two sets of fuel storage systems are configured, etc. This undoubtedly increases the vehicle's own weight and cost, and the control process becomes more complex. For large-displacement engines, a large amount of ignition fuel is consumed during each cold start process, resulting in frequent refueling by users, greatly reducing the convenience of vehicle use and bringing inconvenience to users. To avoid the above problems, there has gradually emerged a method of methanol cracking to produce hydrogen by electric heating in the market. The generated hydrogen is used as fuel to ignite the engine. After the engine water temperature reaches above 30 °C, it is switched to methanol fuel, and at the same time, the methanol cracking reaction is stopped. Although this method only requires filling with one kind of fuel, methanol, to avoid the problems caused by filling two different fuels in the vehicle, it requires a large amount of electric energy to be provided by the whole vehicle, so there is a problem of high energy consumption. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above technical problems and provide a rapid warm-up system for methanol engines. By introducing the exhaust gas generated when the methanol engine ignites hydrogen into the methanol cracking reactor and stopping the power supply of the power battery, the reaction temperature required for methanol cracking is entirely provided by the high-temperature heat of the exhaust gas, thus no longer consuming electric energy, reducing the consumption of electric energy and making full use of the exhaust gas heat.

[0004] To achieve the above purpose, the utility model provides the following solution: The utility model discloses a rapid warm-up system for methanol engines, including:

[0005] A methanol engine, the methanol engine includes an intake manifold and an exhaust manifold;

[0006] A methanol cracking reactor, the methanol cracking reactor provides hydrogen for the methanol engine through the intake manifold, and the methanol cracking reactor provides exhaust gas for the methanol cracking reaction through the exhaust manifold;

[0007] A power battery, the power battery is used to provide electric energy for heating the methanol cracking reactor, and the power battery stops working after the exhaust manifold provides exhaust gas for the methanol cracking reactor.

[0008] Preferably, it includes a heat exchanger which comprises a heat exchange chamber and a heat exchange passage located in the heat exchange chamber. The inlet and outlet of the heat exchange chamber are respectively communicated with the exhaust manifold and the methanol cracking reactor; the methanol engine includes a cooling pipeline, and the liquid inlet end and the liquid outlet end of the cooling pipeline are respectively communicated with the inlet and outlet of the heat exchange passage.

[0009] Preferably, a first temperature sensor is provided between the inlet of the heat exchange chamber and the methanol cracking reactor.

[0010] Preferably, a second temperature sensor is provided between the liquid outlet end of the cooling pipeline and the inlet of the heat exchange passage.

[0011] Preferably, a first flow valve is provided between the exhaust manifold and the inlet of the heat exchange chamber.

[0012] Preferably, a second flow valve is provided between the second temperature sensor and the inlet of the heat exchange passage.

[0013] The utility model has achieved the following technical effects compared with the prior art:

[0014] The main technical problem solved by the utility model is: by introducing the tail gas generated when the methanol engine ignites hydrogen into the methanol cracking reactor, using the high temperature of the tail gas to provide the required reaction temperature for methanol cracking, and stopping the power supply of the power battery, so as to no longer consume electric energy, or using the heat of the tail gas, which not only reduces the consumption of electric energy, but also makes full use of the heat of the tail gas.

[0015] In addition to the above main technical problem solved, the utility model also solves other technical problems:

[0016] By adding a heat exchanger, the utility model exchanges heat between the cooling water of the methanol engine and the tail gas generated when the methanol engine ignites hydrogen, accelerates the temperature of the cooling water, enables the temperature in the methanol engine to quickly reach the temperature for methanol fuel combustion, and thus accelerates the cold start efficiency. Description of the Drawings

[0017] 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 to be used in the embodiments. Obviously, the following described 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.

[0018] Figure 1 It is a structural / principle schematic diagram of the rapid heat engine system of the methanol engine in the embodiment.

[0019] Explanation of the accompanying drawings: 1. methanol engine; 2. methanol cracking reactor; 3. power battery; 4. heat exchanger; 5. intake manifold; 6. exhaust manifold; 7. cooling line; 8. first temperature sensor; 9. second temperature sensor; 10. first flow valve; 11. second flow valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] This embodiment provides a methanol engine rapid heat engine system, such as Figure 1 As shown, it includes: a methanol engine 1, a methanol cracking reactor 2 and a power battery 3. The methanol engine 1 includes an intake manifold 5 and an exhaust manifold 6. The methanol cracking reactor 2 provides hydrogen to the methanol engine 1 through the intake manifold 5, and the methanol cracking reactor 2 provides tail gas for the methanol cracking reaction through the exhaust manifold 6, and the high temperature of the tail gas is used to provide a reaction temperature for methanol cracking. The power battery is used to provide electrical energy to the methanol cracking reactor 2, and the heating plate inside the methanol cracking reactor 2 generates heat to provide a reaction temperature for methanol cracking. The power battery 3 stops working after the exhaust manifold 6 provides tail gas to the methanol cracking reactor 2.

[0022] Working principle:

[0023] The main working principle is as follows: before the cold start of the methanol engine 1, the power battery 3 first supplies power to the methanol cracking reactor 2, which is heated by the heating plate in the methanol cracking reactor 2 to provide the required temperature for the methanol cracking reaction in the reaction chamber of the methanol cracking reactor 2, thereby generating hydrogen. The hydrogen is sent into the methanol engine 1 through the intake manifold 5 for ignition to start the methanol engine 1 normally. High-temperature tail gas will be generated in the methanol engine 1, and the tail gas will be passed into the methanol cracking reactor 2 through the exhaust manifold 6. The reaction chamber is heated outside the reaction chamber. At this time, the power supply of the power battery 3 is cut off. The temperature required for the methanol cracking in the methanol cracking reactor 2 is provided by the high-temperature tail gas, and no power supply from the power battery 3 is required, thereby saving the energy consumption of electric energy. Finally, when the water temperature of the cooling water of the methanol engine 1 reaches 30°C, the methanol engine 1 switches to methanol as fuel for normal operation, and stops the exhaust manifold 6 from supplying gas to the methanol cracking reactor 2, and shuts down the methanol cracking reactor 2. The methanol in the methanol cracking reactor 2 and the methanol in the methanol engine 1 come from the same methanol storage tank.

[0024] In one embodiment, ifFigure 1 As shown, it further includes a heat exchanger 4, which includes a heat exchange chamber and a heat exchange passage located within the heat exchange chamber. The inlet of the heat exchange chamber is connected to the exhaust manifold, and the outlet of the heat exchange chamber is connected to the methanol cracking reactor 2. The methanol engine 1 includes a cooling pipeline 7, the liquid inlet end of the cooling pipeline 7 is connected to the inlet of the heat exchange passage, and the liquid outlet end of the cooling pipeline 7 is connected to the outlet of the heat exchange passage. In this way, before the high-temperature exhaust gas enters the methanol cracking reactor 2, it will first enter the heat exchange chamber of the heat exchanger 4. After the cooling water in the cooling pipeline 7 is discharged from the methanol engine 1, it will enter the heat exchange passage of the heat exchanger 4 and exchange heat with the high-temperature exhaust gas in the heat exchange chamber, thereby quickly increasing the temperature of the cooling water and enabling it to reach 30°C as soon as possible, thus reducing the time required to reach 30°C, accelerating the cold start efficiency, improving the convenience for users, and reducing the consumption of methanol fuel. After the methanol engine 1 switches to methanol as fuel for normal operation, the exhaust manifold 6 stops supplying gas to the heat exchange chamber, the cooling water stops being supplied to the heat exchange passage, and the cooling water starts a normal cooling cycle. The heat exchanger 4 can be a tubular heat exchanger, a plate heat exchanger, or a fin heat exchanger, and thus the heat exchange passage is a heat exchange tube, a heat exchange plate, or a heat exchange fin.

[0025] In one embodiment, as Figure 1 shown, a first temperature sensor 8 is provided between the inlet of the heat exchange chamber and the methanol cracking reactor 2. The temperature of the high-temperature exhaust gas after heat exchange can be monitored through the first temperature sensor 8, and in combination with the exhaust gas volume of the exhaust manifold 6, it is ensured that the reaction chamber temperature in the methanol cracking reactor 2 is within the optimal temperature range for methanol cracking reaction. The optimal temperature for methanol cracking reaction is generally between 250°C and 280°C. When the temperature monitored by the first temperature sensor 8 is lower than 250°C, the exhaust gas volume of the exhaust manifold 6 needs to increase the flow rate on the previous basis. When the temperature monitored by the first temperature sensor 8 is higher than 280°C, the exhaust gas volume of the exhaust manifold 6 needs to reduce the flow rate on the previous basis.

[0026] In one embodiment, as Figure 1 shown, a second temperature sensor 9 is provided between the liquid outlet end of the cooling pipeline 7 and the inlet of the heat exchange passage. The temperature of the discharged cooling water can be monitored through the second temperature sensor 9, and this temperature is the water temperature of the cooling water in the methanol engine 1.

[0027] In one embodiment, as Figure 1 shown, a first flow valve 10 is provided between the exhaust manifold 6 and the inlet of the heat exchange chamber of the heat exchanger 4. By controlling the opening degree of the first flow valve 10, the control of the exhaust gas volume of the exhaust manifold 6 can be achieved.

[0028] In one embodiment, as Figure 1As shown in the figure, a second flow valve 11 is provided between the second temperature sensor 9 and the inlet of the heat exchange passage of the heat exchanger 4. After the methanol engine 1 switches to methanol as fuel and operates normally, the first flow valve 10 and the second flow valve 11 are closed.

[0029] In one embodiment, as Figure 1 shown, the methanol cracking reactor 2 includes a housing. A heating chamber and a reaction chamber located in the heating chamber are provided inside the housing. A methanol supply inlet, a hydrogen discharge outlet, an exhaust gas inlet, and an exhaust gas discharge outlet are provided on the housing. The methanol supply inlet and the hydrogen discharge outlet communicate with the reaction chamber, and the exhaust gas inlet and the exhaust gas discharge outlet communicate with the heating chamber. The hydrogen discharge outlet communicates with the intake manifold 5. The methanol supply inlet communicates with the methanol storage tank. The exhaust gas inlet communicates with the exhaust manifold 6 through a heat exchange chamber. The exhaust gas discharge outlet communicates with the outside. High-temperature exhaust gas enters the heating chamber from the exhaust gas inlet, and the heating chamber heats the reaction chamber. The heating plate is electrically connected to the power supply 3, and the heating plate can be arranged inside the reaction chamber or inside the heating chamber.

[0030] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A methanol engine rapid heat-up system, characterized in that: include: A methanol engine, the methanol engine comprising an intake manifold and an exhaust manifold; A methanol cracking reactor, wherein the methanol cracking reactor provides hydrogen to the methanol engine through an intake manifold, and the methanol cracking reactor provides tail gas for a methanol cracking reaction through an exhaust manifold; A power battery, the power battery is used to provide electric energy to the methanol cracking reactor for heating, and the power battery stops working after the exhaust manifold provides exhaust gas to the methanol cracking reactor; and a heat exchanger, the heat exchanger comprising a heat exchange chamber and a heat exchange passage located in the heat exchange chamber, the inlet and outlet of the heat exchange chamber are respectively connected to the exhaust manifold and the methanol cracking reactor; the methanol engine comprises a cooling pipeline, the liquid inlet and liquid outlet of the cooling pipeline are respectively connected to the inlet and outlet of the heat exchange passage.

2. A methanol engine rapid thermal engine system according to claim 1, characterized in that: A first temperature sensor is provided between the inlet of the heat exchange chamber and the methanol cracking reactor.

3. A methanol engine rapid thermal engine system according to claim 2, characterized in that: A second temperature sensor is provided between the liquid outlet of the cooling pipeline and the inlet of the heat exchange passage.

4. A methanol engine rapid thermal engine system according to claim 3, characterized in that: A first flow valve is provided between the exhaust manifold and the inlet of the heat exchange chamber.

5. A methanol engine rapid thermal engine system according to claim 4, characterized in that: A second flow valve is provided between the second temperature sensor and the inlet of the heat exchange passage.

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