Methanol to hydrogen combustion evaporator

Abstract

The present invention discloses a methanol hydrogen production combustion evaporator, which belongs to the field of high-temperature steam equipment. The technical solution includes a methanol hydrogen production device and a hydrogen fuel evaporation device. The methanol hydrogen production device includes a hydrogen production catalytic tank, in which a plurality of reaction catalytic tubes and heating tubes are arranged. The hydrogen fuel evaporation device includes a hydrogen burner, an evaporator, a methanol evaporator, a medium-temperature heater and a condenser. The combustion direction of the hydrogen burner is toward the evaporator below. The liquid outlet of the methanol evaporator is connected to the methanol steam chamber in the hydrogen production catalytic tank through a methanol steam pipe, and the air inlet of the hydrogen burner is connected to the hydrogen buffer chamber in the hydrogen production catalytic tank. In the present application, the methanol hydrogen production device and the hydrogen fuel evaporation device work together. The waste heat of the hydrogen burner vaporizes methanol so that it can enter the methanol hydrogen production device without heating to stably and efficiently produce hydrogen, thereby achieving synergistic efficiency and reducing energy consumption; reverse combustion causes high-temperature fuel gas to be retained to improve heat transfer efficiency.

Description

Technical Field

[0001] The invention relates to the field of high-temperature steam equipment, in particular to a methanol-to-hydrogen combustion evaporator. Background Art

[0002] Methanol has a wide range of sources and mature production processes. It mainly comes from coal chemical industry and natural gas synthesis. It can be made from coal, natural gas, coalbed methane, biomass, etc. Compared with the physical and chemical properties of other fuels, methanol has the following characteristics: 1. Low calorific value. The calorific value of methanol is about half of that of gasoline. 2. Toxic. Methanol is highly toxic and cannot be drunk. 3. Under high temperature and sufficient air conditions, methanol is completely burned to produce CO2 and H2O. However, methanol combustion can also produce pollutants such as formaldehyde and nitrogen oxides, which also need further purification. 4. The cost of methanol to produce unit heat is low, so methanol can be used as a gasoline additive to reduce fuel costs. A new type of green and environmentally friendly fuel boiler using methanol as fuel has emerged, and its nitrogen oxide and toxicity emissions can be less than 30mg. However, the boiler still emits pollutants. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional technology and provide a high-efficiency, low-cost methanol-to-hydrogen combustion evaporator that uses methanol as fuel but does not emit any pollutants.

[0004] The purpose of the present invention is achieved through the following technical measures:

[0005] A methanol hydrogen production combustion evaporator comprises a methanol hydrogen production device and a hydrogen fuel evaporation device, characterized in that the methanol hydrogen production device comprises a hydrogen production catalytic tank, the hydrogen production catalytic tank comprises a methanol vapor chamber, a catalytic reaction chamber and a hydrogen buffer chamber, a plurality of reaction catalytic tubes and a heating tube are arranged in the catalytic reaction chamber, the upper end of the reaction catalytic tube is communicated with the hydrogen buffer chamber, the lower end of the reaction catalytic tube is communicated with the methanol vapor chamber, the reaction catalytic tube is filled with a methanol hydrogen production catalyst, the hydrogen fuel evaporation device comprises a wind chamber and a combustion chamber, the lower part of the wind chamber is communicated with the upper part of the combustion chamber, the lower part of the combustion chamber is provided with an air outlet, and the combustion chamber is arranged from top to bottom. A hydrogen burner, an evaporator, a methanol evaporator, a medium-temperature heater and a condenser are sequentially arranged, the hydrogen burner is arranged between the wind chamber and the combustion chamber, the combustion direction of the hydrogen burner is toward the evaporator below, the water inlet end of the condenser is connected with a water pump, the water outlet end of the condenser is communicated with the water inlet end of the medium-temperature heater, the water outlet end of the medium-temperature heater is communicated with the water inlet end of the evaporator, the liquid inlet end of the methanol evaporator is communicated with the methanol storage tank through a methanol pump, the liquid outlet end of the methanol evaporator is communicated with the methanol vapor chamber in the hydrogen production catalytic tank through a methanol steam pipe, and the air inlet end of the hydrogen burner is communicated with the hydrogen buffer chamber in the hydrogen production catalytic tank. In the present application, the methanol hydrogen production device and the hydrogen fuel evaporation device work together, the waste heat of the hydrogen fuel evaporation device vaporizes methanol, and puts the methanol vapor in the temperature range of the best catalytic hydrogen production, and the system can enter the stable operation stage three minutes after starting, and the methanol vapor in the hydrogen fuel evaporation device can reach the most suitable catalytic temperature. After the methanol vapor enters the methanol hydrogen production device, it does not need to use an additional heating device to maintain stable and efficient hydrogen production. There are good synergistic effects between the two, reducing energy consumption and reducing the cost of use and maintenance. The hydrogen burner in the present application is located above the combustion chamber, and the high-temperature gas generated by the combustion is pushed from top to bottom by the air pressure and discharged from the lower air outlet. The high-temperature gas is driven by the wind pressure to resist its own upward trend, so that the high-temperature gas can be retained more in the combustion chamber, and the heated evaporator, methanol evaporator, medium-temperature heater and condenser in the combustion chamber are more closely and longer contacted. The retention of high-temperature gas can significantly improve the heat transfer efficiency between the high-temperature gas and the heated components, so that the heat is fully conducted, which greatly saves energy and avoids the heat carried by the high-temperature gas from being fully absorbed and discharged. Energy can be fully utilized, thereby reducing fuel costs. Moreover, the reverse combustion structure can significantly reduce the size of the heated components because the high-temperature combustion gas stays in contact with the heated components for a longer period of time. A smaller heated component can fully absorb the heat of the combustion gas, and does not require a large heating structure, thus saving manufacturing costs.

[0006] As a preferred solution, a steam filter is provided between the methanol steam chamber and the catalytic reaction chamber in the hydrogen production catalytic tank, and the steam filter is an 8-mesh stainless steel wire mesh.

[0007] As a preferred solution, a methanol inlet and outlet pipe is installed in the hydrogen production catalytic tank, the inlet of the methanol inlet and outlet pipe is connected to the methanol steam pipe, and the methanol inlet and outlet pipe enters the hydrogen production catalytic tank from the upper part of the catalytic reaction chamber and the outlet extends to the bottom of the steam filter in the methanol steam chamber. The main body of the methanol inlet and outlet pipe arranged in the catalytic reaction chamber can allow the methanol steam to assimilate the temperature over a certain distance after entering the hydrogen production catalytic tank, so that the methanol steam entering the methanol steam chamber is closer to the catalytic temperature of the optimal hydrogen production reaction, thereby improving the efficiency of the catalytic reaction, reducing the waste of heat energy, and extending the service life of the catalyst to a certain extent. The methanol inlet and outlet pipe is arranged in the hydrogen production catalytic tank from top to bottom, and the lower part of the hydrogen production catalytic tank can be free of any external structure, so that it can be designed as a flat structure, thereby reducing the trouble of installation.

[0008] As a preferred solution, the heating tube includes a first heating tube and a second heating tube, the first heating tube and the second heating tube are respectively arranged at the lower part of the catalytic reaction chamber, the reaction catalytic tube is arranged around the first heating tube and the second heating tube; a temperature sensor is arranged in the catalytic reaction chamber. The power of the first heating tube and the second heating tube can be the same, or one can have a large power and the other a small power. When the equipment is initially used, both heating tubes work, heat up quickly, and vaporize methanol. When the combustion evaporator gradually heats up until normal operation, the methanol entering the methanol hydrogen production device is vaporized methanol. The heating tubes can be closed in sequence until they are completely closed, which can ensure that the methanol is at the temperature that is most conducive to catalytic hydrogen production.

[0009] As a preferred solution, the upper pipeline of the hydrogen production catalytic tank is connected to an expansion barrel, and the expansion barrel is provided with a pressure relief valve. The pressure relief valve pipeline is connected to a leakage alarm and a burner. Once the pressure in the expansion barrel is too high, the pressure relief valve starts to release pressure, and the leakage alarm triggers the burner at the same time. The burner generates high temperature, so that the leaked combustible gas is burned with oxygen, eliminating the risk of toxic gas or greenhouse gas leakage pollution and preventing air pollution.

[0010] As a preferred solution, the hydrogen burner includes a hydrogen pipe and a flame nozzle, wherein the flame nozzle is placed on the hydrogen pipe and faces the evaporator below, and a high-temperature combustion chamber is provided between the flame nozzle and the evaporator. The direction of travel of the high-temperature fuel gas of the hydrogen fuel evaporation device is completely different from that of the traditional burner. The high-temperature fuel gas in the present application is forced to circulate from top to bottom by the fan. Under the action of the rising power of the high-temperature fuel gas, the high-temperature fuel gas is driven by the fan to travel from top to bottom, so that it can better contact closely with the evaporator, methanol evaporator, medium-temperature heater and condenser below, greatly increasing the heat transfer efficiency between the two, thereby improving the efficiency of energy use, reducing heat waste, and saving use costs.

[0011] As a preferred solution, the inner wall of the combustion chamber is provided with a fire wall, and the fire wall extends downward from the high-temperature combustion chamber to the medium-temperature heater.

[0012] As a preferred solution, the evaporator and the medium-temperature heater are both formed by coiling boiler tubes, the outer periphery of the boiler tubes is provided with heat-conducting fins, and the coiling of the boiler tubes forms a staggered multi-layer and a layer of multi-row distribution structure, wherein a layer of multi-rows is formed by the boiler tubes of the same height arranged side by side or spiraled, and the staggered multi-layer is formed by the staggered intervals of the adjacent boiler tubes between the upper and lower layers. The staggered multi-layer and the layer of multi-row distribution structure make the high-temperature gas present a complex and slow discharge path, so that it has more and longer close contact with the evaporator and the medium-temperature heater, resulting in good heat conduction, greatly optimizing the heat transfer, and reducing heat spillover.

[0013] As a preferred solution, the methanol evaporator is formed by winding methanol evaporation tubes, and the methanol evaporation tubes are located between the gaps formed by the boiler tubes that constitute the evaporator and the medium-temperature heater. A flat layer of methanol evaporator formed by winding methanol evaporation tubes is located between the evaporator and the medium-temperature heater, and can obtain high-temperature conduction of the combustion flame. After the high temperature of the flame is absorbed by the evaporator, the residual high temperature is enough to raise the internal methanol temperature of the methanol evaporator to the catalytic suitable temperature of methanol hydrogen production. Therefore, after the entire system cycle works stably, the heating tube in the hydrogen production catalytic tank can completely stop the electric heating, and completely rely on the high temperature of methanol vapor to maintain hydrogen production. After the high-temperature gas heats and vaporizes methanol, the high-temperature gas further absorbs heat through the medium-temperature heater, and its residual heat is already less, which will not have an adverse effect on the combustion chamber shell, and the condenser at the lower part can be directly discharged after further absorbing heat. Hydrogen combustion only produces a small amount of water vapor, and there is no need for subsequent treatment of any pollutants, which completely saves the equipment for subsequent pollution treatment, completely cancels the investment and maintenance costs of environmental protection equipment, and greatly reduces the overall cost of steam use.

[0014] Due to the adoption of the above technical solution, compared with the prior art, the advantages of the present invention are:

[0015] The invention discloses a methanol hydrogen production combustion evaporator, which adopts a methanol hydrogen production device and a hydrogen fuel evaporation device that work in coordination with each other. When steam is generated by burning hydrogen in the hydrogen fuel evaporation device, methanol steam is generated at the same time. The high-temperature methanol steam enters the methanol hydrogen production device, and its own temperature can completely maintain the operation of the methanol catalytic hydrogen production system. The hydrogen generated by the system enters the hydrogen fuel evaporation device to maintain the production of industrial steam and methanol steam. In the later stage of stable operation of the system, its own heat can maintain stable operation without a large amount of additional heating. The hydrogen burner of the present application adopts reverse combustion technology, which significantly increases the retention time of the high-temperature fuel gas generated by combustion in the combustion chamber, thereby greatly increasing the heat transfer efficiency of the high-temperature fuel gas to the heated components, not only significantly reducing the overall energy consumption and improving the thermal efficiency, but also significantly reducing the overall energy consumption. In addition, the hydrogen combustion method makes the exhaust material of the entire system only water vapor, and no other environmental protection waste treatment equipment is required, which not only greatly reduces the equipment investment, but also greatly reduces the operation and maintenance costs of the equipment.

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the overall structure of the methanol-to-hydrogen combustion evaporator of the present invention.

[0018] Attached Figure 2 It is a structural schematic diagram of a methanol hydrogen production device in a methanol hydrogen production combustion evaporator of the present invention.

[0019] Attached Figure 3 It is a schematic diagram of the cutaway structure of the methanol hydrogen production device in the methanol hydrogen production combustion evaporator of the present invention.

[0020] Attached Figure 4 Yes Figure 2 Schematic diagram of the structure cut along the AA axis.

[0021] Attached Figure 5 It is a structural schematic diagram of another implementation mode of the methanol hydrogen production device in the methanol hydrogen production combustion evaporator of the present invention.

[0022] Attached Figure 6 It is a schematic structural diagram of a hydrogen fuel evaporation device in a methanol-to-hydrogen combustion evaporator of the present invention.

[0023] Attached Figure 7 It is a schematic structural diagram of a hydrogen fuel evaporation device in the methanol-to-hydrogen combustion evaporator of the present invention cut away from another angle.

[0024] In the attached figure: 1. methanol hydrogen production device; 2. hydrogen fuel evaporation device; 3. hydrogen production catalytic tank; 4. tank body; 5. base; 6. upper head; 7. methanol steam chamber; 8. catalytic reaction chamber; 9. hydrogen buffer chamber; 10. reaction catalytic tube; 11. methanol hydrogen production catalyst; 12. heating tube; 13. temperature sensor; 121. first heating tube; 122. second heating tube; 14. wind chamber; 15. combustion chamber; 16. hydrogen burner; 161. hydrogen pipe; 162. flame nozzle; 17. evaporator; 18. methanol evaporator; 19. medium temperature heater; 20. condenser; 21. methanol pump; 22. methanol storage tank; 23. fan; 24. water pump; 25. steam filter; 26. methanol inlet and outlet pipes; 27. methanol steam pipe; 28. expansion tank; 29. ​​pressure relief valve; 30. leakage alarm; 31. burner; 32. high temperature combustion chamber. DETAILED DESCRIPTION

[0025] Example: Figures 1 to 7 As shown, a methanol hydrogen production combustion evaporator comprises a methanol hydrogen production device 1 and a hydrogen fuel evaporation device 2, wherein the methanol hydrogen production device 1 comprises a hydrogen production catalytic tank 3, wherein the hydrogen production catalytic tank 3 comprises a sealed cavity composed of a tank body 4, a base 5 and an upper head 6, wherein the tank body 4 and the upper head 6 are sealed and connected by a high temperature resistant sealing gasket, wherein the tank body 4 and the base 5 can be integrally formed or sealed and connected by a high temperature resistant sealing gasket, wherein the sealed cavity in the hydrogen production catalytic tank 3 comprises a methanol vapor cavity 7, a catalytic reaction cavity 8 and a hydrogen buffer cavity 9, wherein a plurality of reaction catalytic tubes 10 and a heating tube 12 are arranged in the catalytic reaction cavity 8, wherein the upper end of the reaction catalytic tube 10 is connected to the hydrogen buffer cavity 9, and the lower end of the reaction catalytic tube 10 is connected to the methanol vapor cavity 7, wherein the reaction catalytic tube 10 is filled with a methanol hydrogen production catalyst 11, wherein the hydrogen fuel evaporation device 2 comprises a wind chamber 14 and a combustion chamber 15, wherein the wind chamber 14 pipeline is connected to a fan 23, The lower part of the wind chamber 14 is communicated with the upper part of the combustion chamber 15, and the lower part of the combustion chamber 15 is provided with an air outlet. A hydrogen burner 16, an evaporator 17, a methanol evaporator 18, a medium-temperature heater 19 and a condenser 20 are arranged in the combustion chamber 15 from top to bottom. The hydrogen burner 16 is arranged between the wind chamber 14 and the combustion chamber 15, and the combustion direction of the hydrogen burner 16 is toward the evaporator 17 below. The water inlet end of the condenser 20 is connected with a water pump 24, the water outlet end of the condenser 20 is communicated with the water inlet end of the medium-temperature heater 19, and the water outlet end of the medium-temperature heater 19 is communicated with the water inlet end of the evaporator 17. The liquid inlet end of the methanol evaporator 18 is communicated with the methanol storage tank 22 through a methanol pump 21, and the liquid outlet end of the methanol evaporator 18 is communicated with the methanol vapor chamber 7 in the hydrogen production catalytic tank 3 through a methanol steam pipe. The air inlet end of the hydrogen burner 16 is communicated with the hydrogen buffer chamber 9 in the hydrogen production catalytic tank 3.

[0026] As attached Figure 3 As shown, a steam filter 25 is provided between the methanol steam chamber 7 and the catalytic reaction chamber 8 in the hydrogen production catalytic tank 3, and the steam filter 25 is an 8-mesh stainless steel wire mesh.

[0027] As attached Figure 3 As shown, a methanol inlet and outlet pipe 26 is installed in the hydrogen production catalytic tank 3, and the inlet of the methanol inlet and outlet pipe 26 is connected to the methanol steam pipe 27. The methanol inlet and outlet pipe 26 enters the hydrogen production catalytic tank 3 from the upper part of the catalytic reaction chamber 8 and the outlet extends to the bottom of the steam filter 25 in the methanol steam chamber 7. The main body of the methanol inlet and outlet pipe arranged in the catalytic reaction chamber can make the methanol steam enter the hydrogen production catalytic tank for a distance for temperature assimilation, so that the methanol steam entering the methanol steam chamber is closer to the catalytic temperature of the optimal hydrogen production reaction, improves the efficiency of the catalytic reaction, reduces the waste of heat energy, and can extend the service life of the catalyst to a certain extent. The methanol inlet and outlet pipe is arranged in the hydrogen production catalytic tank from top to bottom, and the lower part of the hydrogen production catalytic tank can be free of any external structure, so that it can be designed as a flat structure, thereby reducing the trouble of installation.

[0028] As attached Figure 5 As shown, the methanol vapor chamber 7 in the hydrogen production catalytic tank 3 can be directly connected to the methanol vapor pipe 27, so that the methanol vapor directly enters the methanol vapor chamber 7 and then enters the reaction catalytic tube 10 through the steam filter 25 to achieve catalytic hydrogen production. This solution will cause the formaldehyde vapor temperature to be easily affected by the outside world, and the lower part of the hydrogen production catalytic tank 3 needs to construct a support foot to make it off the ground, which will increase the difficulty of maintenance.

[0029] As attached Figures 2 to 4 As shown, the heating tube 12 includes a first heating tube 121 and a second heating tube 122, which are respectively arranged at the lower part of the catalytic reaction chamber 8, and the reaction catalytic tube 10 is arranged around the first heating tube 121 and the second heating tube 122; a temperature sensor 13 is arranged in the catalytic reaction chamber 8. The power of the first heating tube 121 and the second heating tube 122 can be the same, or one can have a large power and the other can have a small power. When the equipment is initially used, the equipment control cabinet receives the temperature of the monitoring point of the temperature sensor 13, energizes the heating tube, and both heating tubes work, and the temperature in the tank rises rapidly, and the methanol is vaporized and enters the catalytic hydrogen production. The prepared hydrogen burns and generates heat after entering the combustion evaporator, so that the temperature in the combustion evaporator gradually rises to the normal operating temperature. The methanol evaporator 18 in the combustion evaporator vaporizes the methanol and heats it to a predetermined temperature. The methanol that enters the methanol hydrogen production device later is vaporized methanol. The heating tubes can be closed in sequence until they are completely closed, which can ensure that the methanol is at the temperature that is most conducive to catalytic hydrogen production.

[0030] As attached Figures 1 to 3As shown, the upper pipeline of the hydrogen production catalytic tank 3 is connected to an expansion barrel 28, and the expansion barrel 28 is provided with a pressure relief valve 29. The pressure relief valve 29 is connected to a leakage alarm 30 and a burner 31 through a pipeline. Once the pressure in the expansion barrel 28 is too high, the pressure relief valve 29 starts to release pressure, and the leakage alarm 30 triggers the burner 31 at the same time. The burner 31 generates high temperature, so that the leaked combustible gas is burned with oxygen, eliminating the risk of toxic gas or greenhouse gas leakage pollution, and preventing air pollution.

[0031] As attached Figure 6 and Figure 7 As shown, the hydrogen burner 16 includes a hydrogen pipe 161 and a flame nozzle 162. The flame nozzle 162 is placed on the hydrogen pipe 161 and faces the evaporator 17 below. A high-temperature combustion chamber 32 is provided between the flame nozzle 162 and the evaporator 17. The direction of high-temperature fuel gas in the hydrogen fuel evaporation device is completely different from that of the traditional burner. The high-temperature fuel gas in the present application is forced to circulate from top to bottom by the fan. Under the action of the rising power of the high-temperature fuel gas, the high-temperature fuel gas is driven by the fan to move from top to bottom, so that it can better contact closely with the evaporator, methanol evaporator, medium-temperature heater and condenser below, greatly increasing the heat transfer efficiency between the two, thereby improving the efficiency of energy use, reducing heat waste, and saving use costs.

[0032] As attached Figure 7 As shown, the inner wall of the combustion chamber 15 is provided with a fire wall 33, and the fire wall 33 extends downward from the high temperature combustion chamber 32 to the medium temperature heater 19. The condenser at the lower part absorbs the residual heat in the exhaust gas, and the exhaust gas reduced to a low temperature is directly discharged from the air outlet, which is not shown in the figure.

[0033] As attached Figure 6 and Figure 7 As shown, the evaporator 17 and the medium-temperature heater 19 are both formed by coiling boiler tubes, and heat-conducting fins are arranged on the outer periphery of the boiler tubes. The boiler tubes are coiled to form staggered multi-layer and multi-row distribution structures. Multi-row means that the boiler tubes of the same height are arranged side by side or spirally, and staggered multi-layer means that the adjacent boiler tubes between the upper and lower layers are staggered at intervals.

[0034] As attached Figure 6 and Figure 7As shown, the methanol evaporator 18 is formed by winding methanol evaporation tubes, and the methanol evaporation tubes are located between the gaps formed by the boiler tubes constituting the evaporator 17 and the medium-temperature heater 19. A flat layer of methanol evaporator formed by winding methanol evaporation tubes is located between the evaporator 17 and the medium-temperature heater 19, and can obtain high-temperature conduction of the combustion flame. After the high temperature of the flame is absorbed by the evaporator, the residual high temperature is sufficient to raise the methanol temperature in the methanol evaporator to the catalytic suitable temperature for hydrogen production from methanol. Therefore, after the entire system cycle is stable, the heating tube in the hydrogen production catalytic tank can completely stop the electric heating, and completely rely on the high temperature of methanol vapor to maintain hydrogen production. After the high-temperature gas is heated and vaporized methanol, the high-temperature gas further absorbs heat through the medium-temperature heater, and its residual heat is already less, which will not have an adverse effect on the shell of the evaporation device, and the condenser at the lower part can be directly discharged after further absorbing heat. Hydrogen combustion only produces a small amount of water vapor, and there is no need for subsequent treatment of any pollutants, which completely saves the equipment for subsequent pollution treatment, completely eliminates the investment and maintenance costs of environmental protection equipment, and greatly reduces the overall cost of steam use.

[0035] The methanol hydrogen production combustion evaporator of the present application uses methanol to produce hydrogen as fuel, and starts quickly. It only takes 3 minutes from cold start to normal steam output of the whole system. The system can produce one ton of steam within one hour, and the corresponding methanol consumption for hydrogen production is 70 kilograms. According to the current market price of 2.2 yuan per kilogram, the cost is only 154 yuan. For comparison, the most common natural gas boilers and coal-fired boilers at present both start-up speeds are measured in hours, which is much lower than the start-up speed of several minutes of the present application. The natural gas boiler uses 75 cubic meters of natural gas for one ton of steam. According to the current price of 4 yuan per cubic meter, the cost is 300 yuan per ton of steam, while the coal consumption of the coal-fired boiler is 150 kilograms. According to the current price of 1.2 yuan per kilogram, the cost is 180 yuan per ton of steam. Compared with the two, the fuel use cost of the present application is the lowest and the start-up speed is the fastest.

[0036] Another huge advantage of this application is environmental protection. The steam in this application is generated by the combustion of hydrogen, which only produces water. There are no pollutants that need to be treated, so there is no need for subsequent exhaust gas treatment. This is far superior to natural gas boilers and coal-fired boilers. The latter two will produce atmospheric pollutants and require certain purification treatments, which also require environmental protection expenses. This application completely saves this part of the expenses.

[0037] The hydrogen burner in the present application is located above the combustion chamber. The high-temperature gas generated by the combustion is pushed from top to bottom by the air pressure and discharged from the lower air outlet. The high-temperature gas is driven by the wind pressure to resist its own upward trend, so that the high-temperature gas can be retained in the combustion chamber for a longer time and have a closer and longer contact with the evaporator, methanol evaporator, medium-temperature heater and condenser heated in the combustion chamber. The retention of the high-temperature gas can significantly improve the heat transfer efficiency between the high-temperature gas and the heated parts, so that the heat is fully conducted, which greatly saves energy and avoids the heat carried by the high-temperature gas being discharged before being fully absorbed. Energy can be fully utilized, thereby reducing fuel costs. Moreover, the reverse combustion structure can significantly reduce the size of the heated parts because the high-temperature gas stays in contact with the heated parts for a longer time. A smaller size of the heated parts can achieve the purpose of fully absorbing the heat of the gas, and it does not require a huge heated structure to achieve this, thus saving manufacturing costs. In addition, the methanol hydrogen production device in this application is 1459*712mm in height and width, and the hydrogen fuel evaporation device is 1529*480mm in height and width. Compared with coal-fired boilers with the same output, the occupied area is only 1 / 3 of that of coal-fired boilers, which can greatly save installation area and improve site utilization efficiency.

Claims

1. A methanol hydrogen production combustion evaporator, comprising a methanol hydrogen production device and a hydrogen fuel evaporation device, characterized in that: The methanol hydrogen production device comprises a hydrogen production catalytic tank, which comprises a methanol vapor chamber, a catalytic reaction chamber and a hydrogen buffer chamber. A plurality of reaction catalytic tubes and a heating tube are arranged in the catalytic reaction chamber. The upper end of the reaction catalytic tube is communicated with the hydrogen buffer chamber, and the lower end of the reaction catalytic tube is communicated with the methanol vapor chamber. The reaction catalytic tube is filled with a methanol hydrogen production catalyst. The hydrogen fuel evaporation device comprises a wind chamber and a combustion chamber. The lower part of the wind chamber is communicated with the upper part of the combustion chamber. The lower part of the combustion chamber is provided with an air outlet. The combustion chamber is provided with a hydrogen burner, an evaporator, a methanol An evaporator, a medium-temperature heater and a condenser, wherein the hydrogen burner is arranged between the wind chamber and the combustion chamber, the combustion direction of the hydrogen burner is toward the evaporator below, the water inlet end of the condenser is connected to a water pump, the water outlet end of the condenser is communicated with the water inlet end of the medium-temperature heater, the water outlet end of the medium-temperature heater is communicated with the water inlet end of the evaporator, the liquid inlet end of the methanol evaporator is communicated with the methanol storage tank through a methanol pump, the liquid outlet end of the methanol evaporator is communicated with the methanol vapor chamber in the hydrogen production catalytic tank through a methanol steam pipe, and the air inlet end of the hydrogen burner is communicated with the hydrogen buffer chamber in the hydrogen production catalytic tank; A steam filter is provided between the methanol steam chamber and the catalytic reaction chamber in the hydrogen production catalytic tank; A methanol inlet and outlet pipe is installed in the hydrogen production catalytic tank, the inlet of the methanol inlet and outlet pipe is connected to the methanol steam pipe, the methanol inlet and outlet pipe enters the hydrogen production catalytic tank from the upper part of the catalytic reaction chamber and the outlet extends to the bottom of the steam filter screen in the methanol steam chamber; The hydrogen burner comprises a hydrogen pipe and a flame nozzle. The flame nozzle is arranged on the hydrogen pipe and faces the evaporator below. A high-temperature combustion chamber is provided between the flame nozzle and the evaporator.

2. The methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The steam filter is an 8-mesh stainless steel wire mesh.

3. The methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The heating tube comprises a first heating tube and a second heating tube, the first heating tube and the second heating tube are respectively arranged at the lower part of the catalytic reaction chamber, and the reaction catalytic tube is arranged around the first heating tube and the second heating tube; a temperature sensor is arranged in the catalytic reaction chamber.

4. The methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The upper pipeline of the hydrogen production catalytic tank is connected with an expansion barrel, the expansion barrel is provided with a pressure relief valve, and the pressure relief valve pipeline is connected with a leakage alarm and a burner.

5. The methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The inner wall of the combustion chamber is provided with a fire wall, and the fire wall extends downward from the high-temperature combustion chamber to the medium-temperature heater.

6. The methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The medium temperature heater is composed of coiled boiler tubes, and heat-conducting fins are arranged on the outer periphery of the boiler tubes. The coiled boiler tubes form a staggered multi-layer and a layer-multi-row distribution structure. The layer-multi-row is composed of the boiler tubes of the same height arranged side by side or spirally, and the staggered multi-layer is composed of the adjacent boiler tubes between the upper and lower layers staggered at intervals.

7. The methanol-to-hydrogen combustion evaporator according to claim 6, characterized in that: The methanol evaporator is composed of a coiled methanol evaporation tube.

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