Spiral tubular methanol reforming hydrogen production device

Abstract

The utility model discloses a spiral tube nest type methanol reforming hydrogen production device. The device comprises a gasification chamber, a combustion chamber, a reforming chamber and a heat exchange chamber which are highly integrated. Due to the fact that the performance of the reforming device is closely related to the heat utilization rate, a spiral reforming flow channel and a tubular combustion flow channel are designed; a methanol solution and electric pile anode tail gas are directly used as a combustion chamber supply source, and heat energy of a combustion chamber and a catalyst of a reforming chamber are used for heat exchange; and the gasified methanol aqueous solution is used as a supply source of a reforming chamber to complete hydrogen production. The device has the advantages of small size and light weight, and can meet the requirement of hydrogen production by using the methanol aqueous solution in the high-temperature chamber. The methanol conversion rate can be improved, the CO concentration can be reduced, and the hydrogen quality can be improved.

Description

Technical Field

[0001] The present application relates to a combustion reforming catalytic device, belonging to the field of combustion cells, and in particular to a spiral tubular methanol reforming hydrogen production device. Background Art

[0002] As the use of traditional fossil fuels has caused a lot of environmental problems, alternative energy has been introduced to cope with increasingly stringent regulations. Hydrogen is an efficient and low-emission alternative energy, but it is not a natural resource and needs to be produced by various means.

[0003] Methanol is one of the most easily available hydrogen source carriers in China. It can produce hydrogen online through reforming to provide a hydrogen source for fuel cells, which not only solves the transportation problem, but also has certain advantages in terms of safety and economy. The working method of methanol fuel hydrogen production is: as long as the fuel is continuously provided, hydrogen can be produced continuously and stably.

[0004] At present, there are three main ways to produce hydrogen from methanol, namely: methanol reforming, methanol cracking, and methanol partial oxidation. Among them, the hydrogen content generated by methanol partial oxidation technology is low, while methanol cracking technology produces CO, which in turn causes serious poisoning of the platinum electrode of the fuel cell. As a highly feasible technology, methanol reforming hydrogen production has the advantages of high energy density, easy storage, and wide sources. It has become an excellent carrier of hydrogen energy. It is the most advantageous and technically mature hydrogen production method in methanol hydrogen production technology. It is considered to be one of the most promising hydrogen production technologies for use in hydrogen fuel cells. Methanol hydrogen production has strong advantages in terms of raw materials, energy consumption, and hydrogen production scale flexibility and efficiency. It is an important development direction of hydrogen production technology in the future. Summary of the invention

[0005] The present application provides a spiral tube-type methanol reforming hydrogen production device, which has a high degree of integration, directly uses methanol aqueous solution as a reforming supply source, effectively processes methanol fuel, forms reformed hydrogen that meets the requirements, and the reformed hydrogen can directly enter the fuel cell stack.

[0006] The spiral tube-type methanol reforming hydrogen production device comprises:

[0007] A vaporization chamber, used for passing methanol aqueous solution to vaporize it;

[0008] The combustion chamber is used to introduce air, combustion methanol and stack anode tail gas, atomize and gasify the combustion methanol, form a hot air flow under the combustion of methanol, and provide heat required for gasification of methanol aqueous solution in the gasification chamber in the cavity of the combustion chamber;

[0009] A reforming chamber, used to make the reforming catalyst filled in the reforming chamber react with the completely vaporized methanol aqueous solution from the vaporization chamber to generate hydrogen;

[0010] The heat exchange chamber is used to introduce the hot air flow generated by the combustion chamber to exchange heat with the catalyst in the reforming chamber to provide heat for the catalytic reaction in the reforming chamber; and to discharge the combustion exhaust gas.

[0011] Optionally, the gasification chamber comprises:

[0012] A methanol-water solution inlet is used to inject the methanol-water solution;

[0013] The heat exchange fins are used to fully heat the methanol-water solution to gasify it.

[0014] Optionally, the gasification chamber further includes heat dissipation fins for transferring heat from the hot gas generated by the combustion chamber to the gasification chamber.

[0015] Optionally, the combustion chamber comprises:

[0016] a combustion air inlet for injecting air;

[0017] A combustion methanol inlet is used to introduce liquid combustion methanol;

[0018] A combustion methanol gasification chamber, used to convert the combustion methanol from liquid to gas;

[0019] The anode tail gas inlet of the fuel cell stack is connected to the anode tail gas port of the fuel cell stack and is used to inject the anode tail gas of the fuel cell stack;

[0020] The ignition plug is used to make the combustion methanol burn in the mixed gas of the anode tail gas of the fuel cell stack and the air, and the generated hot gas is output to the heat exchange chamber.

[0021] Optionally, the combustion chamber further comprises: a temperature measuring thermocouple for real-time monitoring of the combustion temperature in the combustion chamber.

[0022] Optionally, the combustion air inlet further comprises an air pump for adjusting the flow rate of injected air.

[0023] Optionally, the combustion methanol inlet further includes a methanol feed pressure pump for adjusting the flow rate of the combustion methanol.

[0024] Optionally, the reforming chamber comprises:

[0025] A shell, wherein a reforming catalyst is filled in a chamber of the shell; the reforming catalyst undergoes an endothermic reaction with the methanol aqueous solution that has been completely vaporized in the vaporization chamber to generate hydrogen;

[0026] The reforming hydrogen outlet is used to discharge the generated hydrogen.

[0027] Optionally, the chamber of the shell adopts a spiral baffle structure to evenly separate and guide the reforming catalyst, so that the gasified methanol entering the shell to participate in the reaction flows evenly through the catalyst bed, fully reacts with the catalyst, and produces hydrogen. The present application increases the residence time of the reaction gas through this structure, while making the gas flow evenly distributed.

[0028] Optionally, the heat exchange chamber comprises:

[0029] Heat exchange tubes, used to transfer heat from the hot gas generated in the combustion chamber to the reforming chamber;

[0030] A combustion exhaust gas chamber, used to merge the combustion exhaust gases in the heat exchange tubes;

[0031] The combustion tail gas outlet is used to discharge the tail gas in the combustion tail gas cavity.

[0032] Optionally, both ends of the tube body of the heat exchange tube are smooth circular tubes; a plurality of spiral groove tubes are evenly distributed in the middle part, forming a circumferential array. The concave spiral grooves of the spiral groove tubes can increase the heat exchange area of ​​the tube body, not only making it easier to transfer the heat in the center of the fluid to the outside, but also making the gas passing through the heat exchange tube completely turbulent, greatly improving the heat exchange coefficient, thereby enhancing the heat exchange effect.

[0033] Optionally, the diameter of each of the spiral groove tubes is 5 to 8 mm.

[0034] Optionally, the heat exchange chamber further comprises a temperature measuring thermocouple for real-time monitoring of the temperature of the tail gas cavity of the heat exchange chamber.

[0035] Optionally, the inlet and outlet ends of the heat exchange chamber are also provided with perforated plates respectively.

[0036] Optionally, the spacing between each tube of the heat exchange tubes is 4.5-7.5 mm.

[0037] Preferably, the spacing between each tube of the heat exchange tube is 5 mm. Since the particle diameter D of the reforming catalyst is 1.5 mm, its specification is: Φ1.5*1.5 mm, and the heat transfer spacing is suitable for 2 to 10 times D, and 3 to 5 times D is the best. Therefore, as the optimal solution, the spacing between each tube of the heat exchange tube is designed to be 5 mm in this application.

[0038] The beneficial effects of this application include:

[0039] 1) The spiral shell-and-tube methanol reforming hydrogen production device provided in the present application has a high degree of integration, and the gasification chamber, combustion chamber, heat exchange chamber, and reforming chamber are integrated into one, so it has the advantages of small size and light weight.

[0040] 2) The spiral tube-type methanol reforming hydrogen production device provided in the present application has the anode tail gas port of the fuel cell stack connected to the combustion chamber. When the power generation module enters the power generation mode, the excess hydrogen in the fuel cell stack after the hydrogen-oxygen reaction is introduced into the combustion chamber together with the tail gas, which can maintain the temperature of the combustion chamber. There is no need to introduce additional methanol into the combustion chamber, which can ensure the appropriate temperature required by the methanol reforming catalyst and improve the fuel utilization rate.

[0041] 3) The spiral tube-type methanol reforming hydrogen production device provided in the present application has a reforming chamber that no longer needs to enter a separation device, and the generated hydrogen can be directly transported to the fuel cell stack.

[0042] 4) During the startup process of the spiral shell-and-tube methanol reforming hydrogen production device provided in the present application, the ignition plug directly burns methanol, which can shorten the startup time. At the same time, the air heat transfer method can be used to increase the temperature of the reforming chamber and reduce the startup power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the structural framework of a spiral tube-type methanol reforming hydrogen production device in this application;

[0044] Figure 2 This is a structural diagram of the reforming chamber and heat exchange chamber of a spiral tubular methanol reforming hydrogen production device for this application;

[0045] Figure 3 This is a structural diagram of a spiral tube-type methanol reforming hydrogen production device in one embodiment of the present application;

[0046] Figure 4 This is a 45-degree appearance structural diagram of a spiral tubular methanol reforming hydrogen production device in one embodiment of the present application;

[0047] Figure 5 The three-view diagram, external interface description and temperature monitoring point location diagram of the spiral tubular methanol reforming hydrogen production device in one embodiment of the present application;

[0048] Figure 6 This is a structural diagram of a multi-point temperature measurement thermocouple for a spiral tubular methanol reforming hydrogen production device in this application;

[0049] Figure 7 This is a schematic diagram of the steps of an operating method of a spiral tube-type methanol reforming hydrogen production device according to the present application.

[0050] List of components and reference numerals: A: methanol solution inlet; B: combustion air inlet; C: stack anode tail gas inlet; D: methanol aqueous solution inlet; E: reformed hydrogen outlet; F: combustion tail gas outlet;

[0051] Temperature monitoring point mark list: TB1: combustion chamber temperature; TB2: combustion exhaust chamber temperature; TR1~TR5: reforming chamber temperature distribution points. DETAILED DESCRIPTION

[0052] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0053] See also Figure 1 , which shows a schematic diagram of the structural framework of a spiral tube-type methanol reforming hydrogen production device, which includes: a gasification chamber, a combustion chamber, a reforming chamber, and a heat exchange chamber. Hydrogen is produced through the gasification chamber and the reforming chamber, and the reformed gas that meets the requirements is generated and can directly enter the fuel cell stack. Among them,

[0054] The vaporization chamber is used to pass methanol aqueous solution and vaporize it;

[0055] The combustion chamber is used to introduce air, combustion methanol and stack anode tail gas, atomize and gasify the combustion methanol, form a hot air flow under the combustion of methanol, and provide heat required for gasification of methanol aqueous solution in the gasification chamber in the cavity of the combustion chamber;

[0056] The reforming chamber is used to make the reforming catalyst filled in the reforming chamber react with the completely vaporized methanol aqueous solution from the vaporization chamber to generate hydrogen;

[0057] The heat exchange chamber is used to introduce the hot air flow generated by the combustion chamber to exchange heat with the catalyst in the reforming chamber, thereby providing heat for the catalytic reaction in the reforming chamber and discharging the combustion exhaust gas.

[0058] like Figure 3-4 As shown, in one embodiment, the gasification chamber comprises:

[0059] A methanol-water solution inlet A is used to inject the methanol-water solution;

[0060] The heat exchange fins are used to fully heat the methanol-water solution to gasify it.

[0061] In one embodiment, the gasification chamber further includes heat dissipation fins for transferring heat from the hot gas generated by the combustion chamber to the gasification chamber.

[0062] In one embodiment, the combustion chamber comprises:

[0063] Combustion air inlet B, for injecting air;

[0064] The combustion methanol inlet D is used to introduce liquid combustion methanol;

[0065] A combustion methanol gasification chamber, used to convert the combustion methanol from liquid to gas;

[0066] The stack anode tail gas inlet C is connected to the anode tail gas port of the fuel cell stack and is used to inject the stack anode tail gas;

[0067] The ignition plug is used to make the combustion methanol burn in the mixed gas of the anode tail gas of the fuel cell stack and the air, and the generated hot gas is output to the heat exchange chamber.

[0068] In one embodiment, the combustion chamber further includes: a temperature measuring thermocouple for real-time monitoring of the combustion temperature in the combustion chamber.

[0069] In one embodiment, the combustion air inlet further comprises an air pump for adjusting the flow rate of injected air.

[0070] In one embodiment, the combustion methanol inlet further includes a methanol feed pressure pump for adjusting the flow rate of the combustion methanol.

[0071] In one embodiment, the reforming chamber comprises:

[0072] A shell, wherein a reforming catalyst is filled in a chamber of the shell; the reforming catalyst undergoes an endothermic reaction with the methanol aqueous solution that has been completely vaporized in the vaporization chamber to generate hydrogen;

[0073] The reformed hydrogen outlet E is used to discharge the generated hydrogen.

[0074] In one embodiment, the chamber of the shell adopts a spiral baffle structure for evenly separating and guiding the reforming catalyst, so that the vaporized methanol entering the shell to participate in the reaction flows evenly through the catalyst bed and fully reacts with the catalyst to generate hydrogen.

[0075] In one embodiment, the heat exchange chamber comprises:

[0076] Heat exchange tubes, used to transfer heat from the hot gas generated in the combustion chamber to the reforming chamber;

[0077] A combustion exhaust gas chamber, used to merge the combustion exhaust gases in the heat exchange tubes;

[0078] The combustion exhaust gas outlet F is used to discharge the exhaust gas in the combustion exhaust gas cavity.

[0079] In one embodiment, both ends of the tube body of the heat exchange tube are smooth round tubes; a plurality of spiral groove tubes are evenly distributed in the middle portion in a circular array.

[0080] In one embodiment, the diameter of each of the spiral groove tubes is 5 to 8 mm.

[0081] In one embodiment, the heat exchange chamber further includes a temperature measuring thermocouple for real-time monitoring of the temperature of the tail gas cavity of the heat exchange chamber.

[0082] In one embodiment, the inlet and outlet ends of the heat exchange chamber are also provided with perforated plates respectively.

[0083] In one embodiment, the spacing between each tube of the heat exchange tubes is 4.5-7.5 mm.

[0084] In one embodiment, the spacing between each tube of the heat exchange tubes is 5 mm.

[0085] Example 1

[0086] See also Figure 2 , which shows a structural diagram of a reforming chamber and a heat exchange chamber of a spiral tube-type methanol reforming hydrogen production device, wherein:

[0087] The reforming chamber is a cavity inside the shell, and the cavity is filled with a reforming catalyst;

[0088] The heat exchange chamber is a tube-column chamber, in which combustion air flows.

[0089] The tubes are spirally grooved tubes with a diameter of 5 to 8 mm, and a circumferential array heat exchange chamber tube arrangement is used to ensure that the spacing between each tube is about 4.5 to 7.5 mm.

[0090] The tube array is a spiral groove tube, with smooth round tubes at both ends of the tube body and an inwardly concave spiral groove in the middle portion, which increases the heat exchange area of ​​the tube body and makes it easier for the heat in the center of the fluid to transfer outward. The spiral groove can completely generate turbulence in the gas passing through the heat exchange tube, greatly improving the heat exchange coefficient and enhancing the heat exchange effect.

[0091] In this embodiment, the smooth circular tube is a tube with a total length of about 550-750 mm, a circular tube at both ends, a circular diameter of about 10-30 mm, and a spiral groove with a length of 500-700 mm in the middle section.

[0092] The shell chamber adopts a spiral baffle structure (such as Figure 3 As shown in the figure, the reforming catalyst is evenly separated and guided so that the vaporized methanol entering the shell to participate in the reaction flows evenly through the catalyst bed and fully reacts with the catalyst to produce hydrogen.

[0093] The surface of the tubes is in close contact with the spiral baffles, and the hot air in the tubes is conducted to the spiral baffles. The outer surface of the tubes and the surface of the spiral baffles are in full contact with the reforming catalyst, providing heat for the catalyst reaction.

[0094] The particle diameter of the reforming catalyst is D, which is 1.5 mm, and its specification is: Φ1.5*1.5 mm. The appropriate heat transfer spacing is 2 to 10 times D, and the optimal is 3 to 5 times D. Therefore, the design selects the optimal solution to ensure that the spacing between each tube is about 5 mm.

[0095] like Figure 5-6 As shown, the inner chamber of the shell adopts an integrated multi-point temperature measuring thermocouple with 5 built-in temperature measuring points. This application adopts a multi-point temperature measuring thermocouple with a diameter of about Φ6mm, made of 316L stainless steel, and built-in 5-point temperature measuring devices. The filling amount of the reforming catalyst directly affects the efficiency of hydrogen production, so the multi-point temperature measuring thermocouple adopts an integrated structural design with a small size and occupies a small space in the reforming chamber, ensuring that more reforming catalyst can be filled. And it can accurately identify the position in the reforming chamber to ensure that the temperature of the reforming reaction can be monitored in a step-by-step manner.

[0096] The present application also provides an operating method of the above spiral tubular methanol reforming hydrogen production device, comprising:

[0097] (1) The fuel methanol and air are introduced into the combustion chamber, the ignition plug is opened, the methanol is burned to form a hot air flow, and the combustion chamber is left to heat up;

[0098] (2) introducing hydrogen into the reforming chamber to activate the reforming catalyst;

[0099] (3) Methanol continues to be introduced into the fuel chamber for combustion; when the reforming chamber reaches the starting temperature, methanol aqueous solution is introduced into the vaporization chamber, and vaporized methanol is obtained after vaporization; air and stack anode tail gas flow are simultaneously introduced into the combustion chamber and adjusted, and heat is provided to the reforming chamber through the heat exchange chamber so that the temperature inside the chamber reaches the rated temperature and maintains stable operation;

[0100] (4) The reforming catalyst in the reforming chamber undergoes an endothermic reaction with the vaporized methanol from the vaporization chamber at the rated temperature to produce hydrogen.

[0101] In one embodiment, the step (1) specifically includes:

[0102] (11) Start the methanol feed booster pump; inject air from the combustion air inlet and turn on the air pump to adjust its flow rate;

[0103] (12) injecting the heated liquid combustion methanol into the combustion chamber through the methanol solution inlet and atomizing through the atomizing net;

[0104] (13) Open the ignition plug and start the automatic voltage control. After the burning methanol is ignited, it is fully mixed with the air to form a hot air flow. Turn off the ignition plug power supply and wait for the combustion chamber to heat up. The combustion chamber cavity provides heat for the methanol-water solution in the vaporization chamber, and after entering the heat exchange chamber, it provides heat for the reforming catalyst in the reforming chamber.

[0105] In one embodiment, the step (2) specifically includes:

[0106] (21) introducing hydrogen into the reforming chamber to activate the reforming catalyst and controlling the flow rate of hydrogen;

[0107] (22) Adjust the opening of the combustion air pump to maintain the air flow at the combustion air inlet within the rated range. When the temperature at the activation point drops to the set temperature range, turn on the power switch, reintroduce combustion methanol through the combustion methanol inlet, raise the temperature at the activation point to the set control temperature range, and then turn off the power switch.

[0108] This application only requires one activation, followed by the introduction of the anode tail gas from the fuel cell stack.

[0109] In one embodiment, the step (3) specifically includes:

[0110] (31) Turn on the methanol feed pressure pump and inject combustion methanol from the methanol solution inlet;

[0111] (32) When the reforming chamber reaches the starting temperature, open the methanol-water inlet and inject the methanol-water in the set flow range; synchronously and slowly adjust the flow of the combustion gas pump, adjust the anode tail gas inlet of the stack to the set flow range, observe the temperature distribution change of the reforming chamber, and raise the reforming chamber temperature to the rated temperature;

[0112] (33) Adjust the feed nozzle to increase the total flow rate at the methanol-water solution inlet, increase the flow rate at the combustion air inlet to the set flow range by adjusting the flow rate of the combustion air pump, and adjust the anode tail gas inlet of the fuel cell stack to the set flow range, so that the reforming chamber is stabilized at the rated temperature and operates stably under this operating condition.

[0113] In one embodiment, the methanol-water solution inlet adopts a step-by-step feeding method.

[0114] In one embodiment, the step (4) comprises:

[0115] (41) The methanol aqueous solution injected into the methanol aqueous solution inlet absorbs the heat transferred from the combustion chamber in the vaporization chamber, is fully vaporized, and vaporized methanol is obtained and enters the reforming chamber;

[0116] (42) The gasified methanol undergoes a chemical reaction with a reforming catalyst in the reforming chamber to generate hydrogen that meets the requirements of a high-temperature methanol fuel cell stack;

[0117] (43) Air is injected into the combustion air inlet, passes through the combustion chamber and the heat exchange chamber, and is discharged from the combustion exhaust gas outlet.

[0118] In one embodiment, the step (42) further includes: controlling the heat change in the reforming chamber by monitoring 5 temperature monitoring sensors built into the reforming chamber.

[0119] In one embodiment, the step (43) further includes: controlling the temperature of the combustion exhaust gas outlet by monitoring a temperature measuring thermocouple built into the combustion exhaust gas cavity.

[0120] Example 2

[0121] See also Figure 7 , which shows a schematic diagram of the steps of an operation method of a spiral tube-type methanol reforming hydrogen production device, wherein:

[0122] 1. Combustion of methanol for heating: Start the methanol feed booster pump, turn on the air pump to adjust the flow of combustion air B; connect the power supply to the reformer ignition plug, turn on the power supply to adjust the voltage for automatic control; after heating for about tens of seconds, introduce methanol into the methanol solution inlet A, control the flow of methanol, turn off the power supply after igniting the methanol, and wait for the combustion chamber to heat up.

[0123] 2. Reforming catalyst enters activation: hydrogen is introduced into the reforming device for activation, and the flow of hydrogen is controlled. The combustion air pump opening is adjusted, and the air flow of the combustion air inlet B is maintained within the rated range. When the temperature at the activation point drops to the set temperature range, turn on the power switch, and restart by introducing methanol into the combustion methanol inlet A, so that the temperature at the activation point rises to the set control temperature range, and then close it.

[0124] 3. Hydrogen production by reforming unit: Turn on the methanol feed booster pump and inject methanol into the methanol solution inlet A. When the reformer reaches the start-up temperature (TR3>250℃), open the methanol water solution inlet D and inject methanol solution within the set flow range. The combustion gas pump adjusts the flow rate synchronously and slowly, and the anode tail gas inlet C of the stack is adjusted to the set flow range (synchronously and slowly adjusted with the air flow), observe the changes in the temperature distribution of the reforming chamber, and raise the reforming chamber to the rated temperature.

[0125] Then adjust the feed nozzle to increase the total flow rate of the methanol-water solution inlet D (increase the feed in steps to prevent the reformer from losing temperature due to instantaneous large amounts of heat absorption), adjust the combustion air inlet flow rate B of the combustion air pump flow to the set flow range, and adjust the stack anode tail gas inlet C to the set flow range, so that the reforming unit is stabilized at the rated temperature and operates stably under this condition.

[0126] 4. Shutdown of the reforming unit: Stop the injection of methanol-water solution into inlet D, gradually reduce the gas volume of the anode tail gas inlet C of the stack to the set flow range (it cannot be directly reset to zero from the atmospheric volume, which may easily cause combustion chamber deflagration), and gradually reduce the gas volume of the combustion air inlet B to the set flow range as the gas volume of the anode tail gas inlet C of the stack decreases. Stop the injection of the anode tail gas inlet C of the stack.

[0127] Appropriately increase the gas volume of combustion air inlet B to quickly cool down the reformer. When the overall temperature of the reformer drops below 100°C, stop injecting air into combustion air inlet B.

[0128] Here’s how it works:

[0129] 1. Liquid combustion methanol is injected into the methanol solution inlet A, passes through the atomizing net, and is ignited by the ignition plug in the combustion chamber. It is fully mixed with the air at the combustion air inlet B to form a hot air flow, which enters the heat exchange chamber to provide heat for the catalyst in the reforming chamber. The combustion chamber has a built-in temperature monitoring sensor (TB1).

[0130] 2. Air is injected into the combustion air inlet B to provide the oxygen required for the ignition of the methanol solution, and a hot air flow is formed under the combustion of the methanol, which provides heat for the methanol-water solution in the gasification chamber in the combustion chamber, enters the heat exchange chamber of the reforming device, and provides heat for the catalyst in the reforming chamber.

[0131] 3. The gas returned from the anode reaction of the stack is injected into the anode tail gas inlet C of the stack, which can ignite the mixed hydrogen that has not completed the reaction in the stack, and fully mix with the air from the combustion air inlet B in the combustion chamber to form a hot air flow, which enters the heat exchange chamber. The spiral tubes in the heat exchange chamber transfer the heat to the reforming chamber, providing heat for the catalyst filled in the reforming chamber.

[0132] 4. The vaporized methanol-water solution is injected into the methanol-water solution inlet D, which absorbs the heat transferred from the combustion chamber in the vaporization chamber. After being fully vaporized again, it enters the reforming chamber to prevent part of the vaporized methanol in the pipeline from being condensed into methanol-water solution.

[0133] 5. The reforming hydrogen outlet E discharges the hydrogen that meets the requirements. The gasified methanol injected into the methanol aqueous solution inlet D reacts chemically with the reforming catalyst in the reforming chamber to generate hydrogen that meets the requirements of the high-temperature methanol fuel cell stack. The reforming chamber has 5 built-in temperature monitoring sensors (TR1~TR5) to observe the change in heat. The temperature at the inlet and outlet of the reforming chamber is crucial to the heat energy consumed by the reforming reaction.

[0134] 6. The air injected into the combustion air inlet B passes through the combustion chamber and the heat exchange chamber and is discharged from the combustion exhaust gas outlet F. The combustion exhaust gas chamber is equipped with a temperature monitoring thermocouple (TB2). The outlet temperature directly affects the concentration of carbon monoxide. Therefore, the outlet temperature must be controlled to reduce the content of carbon monoxide.

[0135] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A spiral tube-type methanol reforming hydrogen production device, It is characterized in that The device includes: A vaporization chamber, used for passing methanol aqueous solution to vaporize it; The combustion chamber is used to introduce air, combustion methanol and stack anode tail gas, atomize and gasify the combustion methanol, form a hot air flow under the combustion of methanol, and provide heat required for gasification of methanol aqueous solution in the gasification chamber in the cavity of the combustion chamber; A reforming chamber, used to make the reforming catalyst filled in the reforming chamber react with the completely vaporized methanol aqueous solution from the vaporization chamber to generate hydrogen; The heat exchange chamber is used to introduce the hot air flow generated by the combustion chamber to exchange heat with the catalyst in the reforming chamber, thereby providing heat for the catalytic reaction in the reforming chamber and discharging the combustion exhaust gas; The reforming chamber comprises: A shell, wherein a reforming catalyst is filled in a chamber of the shell; the reforming catalyst undergoes an endothermic reaction with a completely gasified methanol aqueous solution introduced into the gasification chamber to generate hydrogen; the chamber of the shell adopts a spiral baffle structure to evenly separate and guide the reforming catalyst, so that the gasified methanol entering the shell to participate in the reaction flows evenly through the catalyst bed and fully reacts with the catalyst to generate hydrogen; A reforming hydrogen outlet for discharging the generated hydrogen; The heat exchange chamber comprises: The heat exchange tubes are used to transfer the heat in the hot air generated in the combustion chamber to the reforming chamber; the two ends of the tube body of the heat exchange tubes are smooth circular tubes; a number of spiral groove tubes are evenly distributed in the middle part in a circumferential array; the surface of the tubes is in close contact with the spiral baffles, and the hot air in the tubes is transferred to the spiral baffles, and the outer surface of the tubes and the surface of the spiral baffles are fully in contact with the reforming catalyst; A combustion exhaust gas chamber, used to merge the combustion exhaust gases in the heat exchange tubes; The combustion tail gas outlet is used to discharge the tail gas in the combustion tail gas cavity.

2. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The gasification chamber comprises: A methanol-water solution inlet is used to inject the methanol-water solution; The heat exchange fins are used to fully heat the methanol-water solution to gasify it.

3. The spiral tube-type methanol reforming hydrogen production device according to claim 2, It is characterized in that The gasification chamber further includes heat dissipation fins for transferring heat from the hot gas generated in the combustion chamber to the gasification chamber.

4. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The combustion chamber comprises: a combustion air inlet for injecting air; A combustion methanol inlet is used to introduce liquid combustion methanol; A combustion methanol gasification chamber, used to convert the combustion methanol from liquid to gas; The anode tail gas inlet of the fuel cell stack is connected to the anode tail gas port of the fuel cell stack and is used to inject the anode tail gas of the fuel cell stack; The ignition plug is used to make the combustion methanol burn in the mixed gas of the anode tail gas of the fuel cell stack and the air, and the generated hot gas is output to the heat exchange chamber.

5. The spiral tube-type methanol reforming hydrogen production device according to claim 4, It is characterized in that The combustion chamber also includes a temperature measuring thermocouple for real-time monitoring of the combustion temperature in the combustion chamber.

6. The spiral tube-type methanol reforming hydrogen production device according to claim 4, It is characterized in that The combustion air inlet further comprises an air pump for adjusting the flow rate of injected air.

7. The spiral tube-type methanol reforming hydrogen production device according to claim 4, It is characterized in that The combustion methanol inlet also includes a methanol feed pressure pump for adjusting the flow rate of the combustion methanol.

8. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The diameter of each spiral groove tube is 5-8 mm.

9. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The heat exchange chamber also includes a temperature measuring thermocouple for real-time monitoring of the temperature of the tail gas cavity of the heat exchange chamber.

10. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The inlet and outlet ends of the heat exchange chamber are also provided with perforated plates respectively.

11. The spiral tube-type methanol reforming hydrogen production device according to claim 1, It is characterized in that The spacing between each tube of the heat exchange tube is 4.5-7.5 mm.

12. The spiral tube-type methanol reforming hydrogen production device according to claim 11, It is characterized in that The spacing between each tube of the heat exchange tube is selected to be 5mm.

Images