CN212303728U - Small methanol reforming hydrogen production device system utilizing tail gas waste heat - Google Patents
Small methanol reforming hydrogen production device system utilizing tail gas waste heat Download PDFInfo
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- CN212303728U CN212303728U CN202021769695.7U CN202021769695U CN212303728U CN 212303728 U CN212303728 U CN 212303728U CN 202021769695 U CN202021769695 U CN 202021769695U CN 212303728 U CN212303728 U CN 212303728U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a small methanol reforming hydrogen production device system utilizing waste heat of tail gas, which comprises a raw material storage tank, a raw material pump, a first regulating valve, a preheater, a reformer, a third regulating valve and a tail gas fan, wherein a thermometer is arranged on the reformer, a heat exchange interlayer is arranged on the outer side of the reformer, and the preheater adopts a heat exchanger structure; the hot tail gas is drawn by a tail gas fan to sequentially pass through a heat exchange interlayer on the outer side of the reformer and a hot channel of the preheater to be heated, a methanol water solution is preheated through a cold channel of the preheater under the conveying action of a raw material pump and then enters a reforming catalyst bed layer of the reformer to react, and the reformer discharges a hydrogen product generated by the reaction. The small methanol reforming hydrogen production device system can be used as an important component of a portable fuel cell power system design, is applied to vehicle-mounted hydrogen fuel cells, produces hydrogen through onboard reforming of methanol for oxidation-reduction reaction, and can solve the problems of difficulty in transportation and difficulty in storage of the hydrogen.
Description
Technical Field
The application relates to a small methanol reforming hydrogen production device system utilizing waste heat of tail gas.
Background
As a clean energy source, hydrogen energy has attracted attention of wide scholars at home and abroad due to its wide application and development prospect. The research on hydrogen energy is more and more popular in the world, and the characteristic that hydrogen is not easy to store and transport is a key factor for preventing the hydrogen from continuing to develop. Thus, many on-site hydrogen production technologies are in force. In addition to the hydrogen production by electrolyzing water, hydrogen production by reforming low-carbon organic matter is one of the hot spots studied in recent years. The methanol catalytic hydrogen production is widely applied due to the characteristics of low cost, low toxicity and easy transportation and treatment of raw materials. Among the four ways of hydrogen production by methanol catalysis, hydrogen production by methanol steam reforming is widely applied.
However, hydrogen is gaseous at normal temperature and pressure, has large volume, is flammable and explosive, and increases the storage and transportation cost if compressed into liquid. Therefore, the difficulty of storage and transportation is the key to the inability of hydrogen fuel cells to be widely used. In order to solve the problem of difficult hydrogen storage and transportation, a plurality of on-site hydrogen production means are continuously developed by researchers, but at present, the on-site hydrogen production means are still in continuous research and are still not mature and put into production in large quantity, and the hydrogen production by reforming low-carbon organic matters is one of the research hotspots of hydrogen production in the years.
Disclosure of Invention
In view of the above technical problems in the prior art, the present application aims to provide a small methanol reforming hydrogen production device system using exhaust gas waste heat. The small methanol reforming hydrogen production device system can be used as an important component of a portable fuel cell power system design, is applied to vehicle-mounted hydrogen fuel cells, produces hydrogen through onboard reforming of methanol for oxidation-reduction reaction, and can solve the problems of difficulty in transportation and difficulty in storage of the hydrogen.
The small methanol reforming hydrogen production device system utilizing the waste heat of the tail gas is characterized by comprising a raw material storage tank, a raw material pump, a first regulating valve, a preheater, a reformer, a third regulating valve and a tail gas fan, wherein the raw material storage tank is internally filled with a methanol water solution; the tail gas fan is connected with the inlet of the heat exchange interlayer of the reformer through a third regulating valve by a pipeline, the outlet of the heat exchange interlayer of the reformer is connected with the hot channel of the preheater through a pipeline, and hot tail gas is heated by the heat exchange interlayer outside the reformer and the hot channel of the preheater in sequence under the traction of the tail gas fan; the raw material storage tank is connected with the reformer sequentially through a raw material pump, a first regulating valve and a cold channel of the preheater, a methanol water solution is preheated through the cold channel of the preheater under the conveying action of the raw material pump and then enters a reforming catalyst bed layer of the reformer to react, and the reformer discharges a hydrogen product generated by the reaction.
The small methanol reforming hydrogen production device system utilizing the waste heat of the tail gas is characterized by further comprising a second regulating valve, a combustion chamber, a fourth regulating valve and an air fan, wherein an outlet of the raw material pump is divided into two paths, and one path is connected with a reformer through a first regulating valve and a cold channel of a preheater so as to convey a methanol water solution into a reforming catalyst bed layer of the reformer for reaction; the other path of the hot gas is connected with a raw material liquid inlet of the combustion chamber through a second regulating valve through a pipeline, an air fan is connected with an air inlet of the combustion chamber through a fourth regulating valve through a pipeline, a gas outlet of the combustion chamber is connected with a heat exchange interlayer inlet of the reformer through a pipeline, so that a methanol water raw material and external air can enter the combustion chamber to perform combustion reaction under the action of a raw material pump and the air fan respectively, and formed hot gas is heated through a heat exchange interlayer outside the reformer and a heat channel of the preheater sequentially.
The small methanol reforming hydrogen production device system utilizing the waste heat of the tail gas is characterized in that the thermometer is in signal connection with a first regulating valve, a second regulating valve, a third regulating valve and a fourth regulating valve through a PLC control system;
in the starting stage of the device system, the PLC control system controls the first regulating valve and the third regulating valve to be closed, the second regulating valve and the fourth regulating valve to be opened, the methanol water raw material and the external air enter the combustion chamber to carry out combustion reaction under the action of the raw material pump and the air fan respectively, and the formed hot gas is heated through the heat exchange interlayer at the outer side of the reformer and the hot channel of the preheater in sequence; the thermometer sends a signal to the PLC control system until the thermometer detects that the temperature of a reforming catalyst bed in the reformer is increased to a set temperature, the PLC control system feeds back and controls the second regulating valve and the fourth regulating valve to be closed, and the first regulating valve and the third regulating valve are opened;
then entering a formal reaction stage, heating the hot tail gas by sequentially passing through a heat exchange interlayer on the outer side of the reformer and a hot channel of the preheater under the traction of a tail gas fan, preheating the methanol aqueous solution by a cold channel of the preheater under the conveying action of a raw material pump, then entering a reforming catalyst bed layer of the reformer for reaction, and discharging a hydrogen product generated by the reaction by the reformer; when the thermometer detects that the temperature of the reforming catalyst bed in the reformer is higher or lower than the set temperature, the thermometer sends a signal to the PLC control system, and the PLC control system feeds back and controls the opening of the third regulating valve to be reduced or increased so as to maintain the temperature of the reforming catalyst bed in the reformer at the reaction temperature.
Utilize small-size methyl alcohol reforming hydrogen plant system of tail gas waste heat, its characterized in that still includes the three-way valve, the three-way valve includes two imports and an export, one of them import of three-way valve is connected by the pipeline through third governing valve and tail gas fan, another import of three-way valve is connected by the pipeline with the gas outlet of combustion chamber, the export of three-way valve is connected by the pipeline with the heat transfer intermediate layer import of reformer, so that the hot combustion gas that the burning formed in the combustion chamber or the hot tail gas of carrying through the tail gas fan, heat through the heat transfer intermediate layer that the three-way valve loops through the reformer outside and the hot aisle of.
The beneficial effect that this application was got is:
the small methanol reforming hydrogen production device system can be used as an important component of a portable fuel cell power system design, is applied to vehicle-mounted hydrogen fuel cells, produces hydrogen through onboard reforming of methanol for oxidation-reduction reaction, and can solve the problems of difficulty in transportation and difficulty in storage of the hydrogen. In the starting stage of the device system, a raw material pump, an air fan and corresponding valves are started, methanol water solution and external air are respectively introduced into a combustion chamber for combustion reaction, and generated hot gas heats a reforming chamber and a preheater to create conditions for reforming hydrogen production reaction. And then closing the air fan and the corresponding valve, preheating the methanol aqueous solution, and introducing the preheated methanol aqueous solution into the reforming chamber to react to obtain hydrogen. The prepared hydrogen product can be applied to a hydrogen fuel engine of a vehicle to push the vehicle to run, and the hot tail gas generated by burning hydrogen of the vehicle is recycled and the heat in the hot tail gas is utilized to maintain the reaction temperature of the reforming chamber.
In this application, the thermometer passes through PLC control system and first governing valve, second governing valve, third governing valve and fourth governing valve signal connection, in case the temperature reaches the target of setting for, just carries out next action by oneself, and more convenient carries out automatic control. Accordingly, if the temperature is abnormal, an alarm can be given and corresponding feedback adjustment operation can be taken.
Drawings
FIG. 1 is a schematic diagram of a compact methanol reforming hydrogen plant system according to the present application;
in fig. 1: 1-raw material storage tank, 2-raw material pump, 3-first regulating valve, 4-preheater, 5-reformer, 6-second regulating valve, 7-combustion chamber, 8-three-way valve, 9-third regulating valve, 10-tail gas fan, 11-fourth regulating valve and 12-air fan.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): compare FIG. 1
A small methanol reforming hydrogen production device system utilizing waste heat of tail gas comprises a raw material storage tank 1 containing a methanol water solution, a raw material pump 2, a first regulating valve 3, a preheater 4, a reformer 5 filled with a reforming catalyst bed layer, a third regulating valve 9 and a tail gas fan 10, wherein the reformer 5 is provided with a thermometer for detecting the temperature of the reforming catalyst bed layer inside, the outer side of the reformer 5 is provided with a heat exchange interlayer, and the preheater 4 adopts a heat exchanger structure; the tail gas fan 10 is connected with a heat exchange interlayer inlet of the reformer 5 through a third regulating valve 9 by a pipeline, a heat exchange interlayer outlet of the reformer 5 is connected with a heat channel of the preheater 4 by a pipeline, and hot tail gas is heated by the heat exchange interlayer outside the reformer 5 and the heat channel of the preheater 4 in sequence under the traction of the tail gas fan 10; the raw material storage tank 1 is connected with the reformer 5 through a cold channel of the raw material pump 2, the first regulating valve 3 and the preheater 4 in sequence, the methanol aqueous solution enters a reforming catalyst bed layer of the reformer 5 for reaction after being preheated through the cold channel of the preheater 4 under the conveying action of the raw material pump 2, and the reformer 5 discharges a hydrogen product generated by the reaction.
Further, the device system of the present application further comprises a second regulating valve 6, a combustion chamber 7, a fourth regulating valve 11, an air blower 12 and a three-way valve 8, wherein the three-way valve 8 comprises two inlets and one outlet.
The outlet of the raw material pump 2 is divided into two paths, one path is connected with the reformer 5 through a first regulating valve 3 and a cold channel of the preheater 4, so that the methanol aqueous solution is conveyed into a reforming catalyst bed layer of the reformer 5 for reaction; the other path is connected with a raw material liquid inlet of the combustion chamber 7 through a second regulating valve 6 by a pipeline, an air fan 12 is connected with an air inlet of the combustion chamber 7 through a fourth regulating valve 11 by a pipeline, and a gas outlet of the combustion chamber 7 is connected with one inlet of the three-way valve 8 by a pipeline. The tail gas fan 10 is connected with the other inlet of the three-way valve 8 through a third regulating valve 9 by a pipeline, and the outlet of the three-way valve 8 is connected with the inlet of the heat exchange interlayer of the reformer 5 by a pipeline.
Methanol water raw material and outside air can enter into combustion chamber 7 under the effect of raw material pump 2 and air blower 12 respectively and carry out combustion reaction, and the hot combustion gas that forms can get into the heat transfer intermediate layer in the outside of reformer 5 and the hot passageway of pre-heater 4 in proper order through three-way valve 8 and heat. In addition, under the traction of the tail gas fan 10, the hot tail gas can enter the heat exchange interlayer outside the reformer 5 and the hot channel of the preheater 4 in sequence through the three-way valve 8 to be heated.
Further, the thermometer is in signal connection with the first regulating valve 3, the second regulating valve 6, the third regulating valve 9 and the fourth regulating valve 11 through a PLC control system;
in the starting stage of the device system, the PLC control system controls the first regulating valve 3 and the third regulating valve 9 to be closed, the second regulating valve 6 and the fourth regulating valve 11 to be opened, the methanol-water raw material and the external air enter the combustion chamber 7 to carry out combustion reaction under the action of the raw material pump 2 and the air fan 12 respectively, and the formed hot gas is heated by sequentially passing through the heat exchange interlayer on the outer side of the reformer 5 and the hot channel of the preheater 4; until the temperature of a reforming catalyst bed layer in the reformer 5 is detected by the thermometer to be heated to a set temperature, the thermometer sends a signal to the PLC control system, the PLC control system feeds back and controls the second regulating valve 6 and the fourth regulating valve 11 to be closed, and the first regulating valve 3 and the third regulating valve 9 are opened;
then entering a formal reaction stage, heating the hot tail gas by sequentially passing through a heat exchange interlayer on the outer side of the reformer 5 and a hot channel of the preheater 4 under the traction of a tail gas fan 10, preheating the methanol aqueous solution by a cold channel of the preheater 4 under the conveying action of the raw material pump 2, then entering a reforming catalyst bed layer of the reformer 5 for reaction, and discharging a hydrogen product generated by the reaction by the reformer 5; when the thermometer detects that the temperature of the reforming catalyst bed in the reformer 5 is higher or lower than the set temperature, the thermometer sends a signal to the PLC control system, and the PLC control system feeds back and controls to reduce or increase the opening of the third regulating valve 9 so as to maintain the temperature of the reforming catalyst bed in the reformer 5 at the reaction temperature.
The device system of this application is at work:
when the device system is started, the reforming catalyst bed in the reformer 5 can be reduced by hydrogen, and the device system can be connected with a hydrogen output system in a matching way. The PLC control system controls the first regulating valve 3 and the third regulating valve 9 to be closed, the second regulating valve 6 and the fourth regulating valve 11 to be opened, the methanol-water raw material and the external air enter the combustion chamber 7 to perform combustion reaction under the action of the raw material pump 2 and the air fan 12 respectively, and the formed hot gas is heated through the heat exchange interlayer outside the reformer 5 and the hot channel of the preheater 4 in sequence. When the temperature of the reforming catalyst bed in the reformer 5 is raised to more than 200 ℃, H can be introduced into the reforming catalyst bed in the reformer 5 through the hydrogen output system2The reduction is carried out so that the reforming catalyst is activated to some extent.
And (3) closing the hydrogen output system after the temperature of the reforming catalyst bed layer in the reformer 5 is detected by the thermometer to be raised to the set temperature (the set temperature can be 270 ℃ of reaction temperature), and simultaneously entering a formal reaction stage.
In the formal reaction stage, the thermometer sends a signal to the PLC control system, the second regulating valve 6 and the fourth regulating valve 11 are fed back and controlled to be closed through the PLC control system, and the first regulating valve 3 and the third regulating valve 9 are opened. The hot tail gas is drawn by a tail gas fan 10 to sequentially pass through a heat exchange interlayer on the outer side of the reformer 5 and a hot channel of the preheater 4 for heating, the methanol water solution is preheated through a cold channel of the preheater 4 under the conveying action of the raw material pump 2 and then enters a reforming catalyst bed layer of the reformer 5 for reaction, and the reformer 5 discharges a hydrogen product generated by the reaction. During the formal reaction stage, when the thermometer detects that the temperature of the reforming catalyst bed in the reformer 5 is higher or lower than the set temperature, the thermometer sends a signal to the PLC control system, and the PLC control system feeds back and controls the opening of the third regulating valve 9 to be adjusted down or up so as to maintain the temperature of the reforming catalyst bed in the reformer 5 at the reaction temperature.
Wherein the hydrogen product discharged from the reformer 5 is applied to a vehicle-mounted hydrogen fuel cell, the vehicle advances under the action of the hydrogen fuel cell, and the generated hot tail gas is reused. The hot tail gas generated by the vehicle can be heated by passing through the heat exchange interlayer outside the reformer 5 and the hot channel of the preheater 4 in sequence under the traction of the tail gas fan 10, so as to provide energy for the whole reaction stage.
In addition, the device system of the application can also comprise an abnormal feedback regulation process, wherein the abnormal feedback regulation process comprises the following steps: the abnormal working condition during the working process is mainly overhigh temperature in the reformer 5, which leads to improper reaction condition, reduced reaction rate and reaction product H2The concentration can not reach the requirement. When the temperature in the reformer 5 reaches the set critical abnormal temperature, the reaction regulation can be carried out through the PLC control system, the raw material pump 2 is temporarily closed, the opening degree of the third regulating valve 9 is reduced, the air fan 12 is opened, room-temperature air is introduced into the reformer 5, and the temperature of the reformer 5 is rapidly reduced. When the temperature in the reformer 5 is decreased to the reaction temperature, the control process of the PLC control system in the formal reaction stage may be resumed.
Claims (4)
1. A small methanol reforming hydrogen production device system utilizing waste heat of tail gas is characterized by comprising a raw material storage tank (1) filled with methanol water solution, a raw material pump (2), a first regulating valve (3), a preheater (4), a reformer (5) filled with a reforming catalyst bed layer, a third regulating valve (9) and a tail gas fan (10), wherein a thermometer used for detecting the temperature of the reforming catalyst bed layer is arranged on the reformer (5), a heat exchange interlayer is arranged on the outer side of the reformer (5), and the preheater (4) adopts a heat exchanger structure; the tail gas fan (10) is connected with the inlet of the heat exchange interlayer of the reformer (5) through a third regulating valve (9) by a pipeline, the outlet of the heat exchange interlayer of the reformer (5) is connected with the hot channel of the preheater (4) by a pipeline, and hot tail gas is pulled by the tail gas fan (10) to sequentially pass through the heat exchange interlayer on the outer side of the reformer (5) and the hot channel of the preheater (4) for heating; the raw material storage tank (1) is connected with the reformer (5) through a cold channel of the raw material pump (2), the first regulating valve (3) and the preheater (4) in sequence, a methanol water solution enters a reforming catalyst bed layer of the reformer (5) for reaction after being preheated through the cold channel of the preheater (4) under the conveying action of the raw material pump (2), and the reformer (5) discharges a hydrogen product generated by the reaction.
2. The small-sized methanol reforming hydrogen production device system using the waste heat of tail gas according to claim 1, characterized by further comprising a second regulating valve (6), a combustion chamber (7), a fourth regulating valve (11) and an air fan (12), wherein the outlet of the raw material pump (2) is divided into two paths, and one path is connected with the reformer (5) through the first regulating valve (3) and a cold channel of the preheater (4) so as to convey the methanol aqueous solution into a reforming catalyst bed layer of the reformer (5) for reaction; the other path of the methanol-water mixed gas is connected with a raw material liquid inlet of a combustion chamber (7) through a second regulating valve (6) through a pipeline, an air fan (12) is connected with an air inlet of the combustion chamber (7) through a fourth regulating valve (11) through a pipeline, a gas outlet of the combustion chamber (7) is connected with a heat exchange interlayer inlet of a reformer (5) through a pipeline, so that a methanol-water raw material and external air can enter the combustion chamber (7) to perform combustion reaction under the action of a raw material pump (2) and the air fan (12) respectively, and formed hot gas is heated sequentially through a heat exchange interlayer outside the reformer (5) and a hot channel of a preheater (4).
3. The small methanol reforming hydrogen production plant system using the waste heat of tail gas according to claim 2, characterized in that the thermometer is in signal connection with the first regulating valve (3), the second regulating valve (6), the third regulating valve (9) and the fourth regulating valve (11) through a PLC control system;
in the starting stage of the device system, the PLC control system controls the first regulating valve (3) and the third regulating valve (9) to be closed, the second regulating valve (6) and the fourth regulating valve (11) to be opened, methanol water raw materials and external air enter the combustion chamber (7) to carry out combustion reaction under the action of the raw material pump (2) and the air fan (12) respectively, and formed hot combustion gas is heated through a heat exchange interlayer at the outer side of the reformer (5) and a hot channel of the preheater (4) in sequence; the thermometer sends a signal to the PLC control system after detecting that the temperature of a reforming catalyst bed in the reformer (5) is increased to a set temperature, the PLC control system feeds back and controls the second regulating valve (6) and the fourth regulating valve (11) to be closed, and the first regulating valve (3) and the third regulating valve (9) are opened;
then entering a formal reaction stage, heating hot tail gas by sequentially passing through a heat exchange interlayer on the outer side of the reformer (5) and a hot channel of the preheater (4) under the traction of a tail gas fan (10), preheating a methanol aqueous solution by a cold channel of the preheater (4) under the conveying action of a raw material pump (2), then entering a reforming catalyst bed layer of the reformer (5) for reaction, and discharging a hydrogen product generated by the reaction by the reformer (5); when the thermometer detects that the temperature of the reforming catalyst bed in the reformer (5) is higher or lower than the set temperature, the thermometer sends a signal to the PLC control system, and the PLC control system feeds back and controls the opening of the third regulating valve (9) to be reduced or increased so as to maintain the temperature of the reforming catalyst bed in the reformer (5) at the reaction temperature.
4. The small-sized methanol reforming hydrogen production device system using waste heat of tail gas as claimed in claim 2, characterized by further comprising a three-way valve (8), wherein the three-way valve (8) comprises two inlets and one outlet, one inlet of the three-way valve (8) is connected with the tail gas fan (10) through a third regulating valve (9) by a pipeline, the other inlet of the three-way valve (8) is connected with the gas outlet of the combustion chamber (7) by a pipeline, and the outlet of the three-way valve (8) is connected with the heat exchange interlayer inlet of the reformer (5) by a pipeline, so that the hot gas formed by combustion in the combustion chamber (7) or the hot tail gas delivered by the tail gas fan (10) is heated by the three-way valve (8) sequentially through the heat exchange interlayer outside the reformer (5) and the hot channel of the preheater (.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883805A (en) * | 2020-08-23 | 2020-11-03 | 浙江工业大学 | Small methanol reforming hydrogen production device system based on tail gas waste heat utilization |
| CN113782767A (en) * | 2021-08-24 | 2021-12-10 | 武汉理工大学 | Reforming hydrogen-oxygen production fuel cell ship waste heat comprehensive utilization system |
| CN113998670A (en) * | 2021-12-27 | 2022-02-01 | 广东蓝玖新能源科技有限公司 | Hydrogen production machine |
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2020
- 2020-08-23 CN CN202021769695.7U patent/CN212303728U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883805A (en) * | 2020-08-23 | 2020-11-03 | 浙江工业大学 | Small methanol reforming hydrogen production device system based on tail gas waste heat utilization |
| CN111883805B (en) * | 2020-08-23 | 2024-04-16 | 浙江工业大学 | Small-size methyl alcohol reforming hydrogen plant system based on tail gas waste heat utilization |
| CN113782767A (en) * | 2021-08-24 | 2021-12-10 | 武汉理工大学 | Reforming hydrogen-oxygen production fuel cell ship waste heat comprehensive utilization system |
| CN113998670A (en) * | 2021-12-27 | 2022-02-01 | 广东蓝玖新能源科技有限公司 | Hydrogen production machine |
| CN113998670B (en) * | 2021-12-27 | 2024-05-28 | 广东蓝玖新能源科技有限公司 | Hydrogen production machine |
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