CN210576245U - Heat utilization system of methanol reforming fuel cell - Google Patents
Heat utilization system of methanol reforming fuel cell Download PDFInfo
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- CN210576245U CN210576245U CN201921686043.4U CN201921686043U CN210576245U CN 210576245 U CN210576245 U CN 210576245U CN 201921686043 U CN201921686043 U CN 201921686043U CN 210576245 U CN210576245 U CN 210576245U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The utility model discloses a methanol reforming fuel cell heat utilization system, include: the device comprises a galvanic pile, a reforming chamber, a dosing device, a proportional valve, a cooling device, a fuel tank, a detection device and a control device. The utility model provides a system utilizes the heat dissipation circulation medium of methanol-water mixed solution as the pile, the subassembly quantity of pile heat dissipation circulation system has been reduced, the volume also obviously diminishes, it is the same with the fuel of a whole system through circulation medium, the use of other circulation medium has been avoided, the cost expense is reduced, circulation medium after the cooling gets back to the fuel tank and can also reuse, the utilization efficiency is improved, link the pile and reforming chamber together, can be with the waste heat make full use of pile reaction, improve holistic utilization ratio, the loss of energy has been reduced.
Description
Technical Field
The utility model relates to a fuel cell technical field, in particular to methanol reforming fuel cell heat utilization system.
Background
The technical scheme adopted by the methanol reforming fuel cell is that the methanol reforming hydrogen production fuel cell is one of proton exchange membrane fuel cells, the technical principle is that hydrogen carried by methanol and water is converted into hydrogen in a reforming chamber by adopting a steam reforming method, then the hydrogen is introduced into a galvanic pile, so that the hydrogen and oxygen generate electrochemical reaction in the galvanic pile to be converted into electric energy, methanol-water mixed steam is reformed into hydrogen in the reforming chamber under the action of catalyst catalysis at high temperature, the reaction is an endothermic reaction, and a large amount of heat needs to be absorbed from the outside; when the galvanic pile normally works, hydrogen and oxygen generated by the reforming chamber generate electricity through electrochemical reaction inside the galvanic pile, and simultaneously release a large amount of heat, the released heat needs to be timely dissipated to the galvanic pile through a circulating medium, the phenomenon that the heat inside the galvanic pile exceeds the optimum temperature to influence the generating efficiency is avoided, and even the heat inside the galvanic pile is accumulated to cause irreversible damage to the galvanic pile.
At present, the methanol water reforming system and the electric pile power generation system have the following defects: the methanol-water mixed solution needs to be changed into methanol-water mixed steam firstly, which is an endothermic process and needs to absorb a large amount of heat in a reforming chamber; the reaction process of reforming hydrogen production by methanol-water mixed steam is also an endothermic reaction, a large amount of heat is absorbed in the reforming chamber, and a large amount of stable heat is required to be provided by the reforming chamber; the heat source provided by the reforming chamber needs to be stable, reliable and controllable, so that the control difficulty of the heat source and the heat control difficulty are increased; the heat dissipation of the galvanic pile needs to be supported by a circulating system, the circulating system is composed of a circulating power device, a galvanic pile flow channel, a heat dissipation device, a circulating medium and the like, the number of galvanic pile accessories is increased, the occupied volume is large, the complexity of the system is increased by the circulating system, and meanwhile, a large amount of system control resources need to be occupied for controlling the system, and the control difficulty is increased; when the circulating medium of the galvanic pile is selected, the physicochemical characteristics of the circulating medium need to be considered, the circulating medium has good fluidity at low temperature, is not easy to volatilize, has good thermal stability, cannot be scorched at high temperature, has good temperature rise performance, increases the difficulty of selecting the circulating medium, and has higher cost; the heat dissipated by the pile is directly dissipated into the air, and the heat is difficult to reuse.
SUMMERY OF THE UTILITY MODEL
The utility model provides a methanol reforming fuel cell heat utilization system for solve the problem that exists among the prior art.
The utility model provides a pair of methanol reforming fuel cell heat utilization system, include: the fuel cell comprises a fuel tank, a dosing device, a galvanic pile, a reforming chamber, a cooling device and a proportional valve;
the fuel tank is communicated with the quantitative device and is used for storing the methanol-water mixed solution and conveying the methanol-water mixed solution to the quantitative device;
the quantitative device is communicated with the galvanic pile and is used for conveying the methanol-water mixed solution conveyed by the fuel tank to the galvanic pile;
the galvanic pile is communicated with the reforming chamber and is used for receiving reformed hydrogen conveyed by the reforming chamber, the reformed hydrogen and air generate electrochemical reaction in the galvanic pile to generate electric energy and heat, and methanol-water mixed steam generated in the heat dissipation process is conveyed to the proportional valve;
the proportional valve is communicated with the galvanic pile, the cooling device and the reforming chamber respectively and is used for conveying the methanol-water mixed steam which is received and conveyed by the galvanic pile to the reforming chamber and the cooling device respectively according to a set proportion;
the reforming chamber is used for reforming the methanol-water mixed steam conveyed by the proportional valve to generate reformed hydrogen and conveying the generated reformed hydrogen to the electric pile;
the cooling device is communicated with the fuel tank and is used for cooling and liquefying the methanol-water mixed steam entering the cooling device to form a methanol-water mixed solution and conveying the methanol-water mixed solution to the fuel tank.
In one embodiment of the invention, the system further comprises:
a detection device and a control device;
the detection device is arranged between the galvanic pile and the quantitative device, between the galvanic pile and the proportional valve, between the cooling device and the proportional valve, between the reforming chamber and the galvanic pile, between the cooling device and the fuel tank, and between the fuel tank and the quantitative device, and is used for acquiring detection data and transmitting the detection data to the control device;
the control device is connected with the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device, and controls the operation of each component by using control logic, algorithm and a built-in database system in the control device.
In one embodiment, the stack is a high temperature pem fuel cell stack.
In one embodiment of the present invention, the cell stack is provided with an air inlet, an air exhaust port, a circulating medium inlet, a circulating medium outlet, a reformed hydrogen inlet, and a reformed hydrogen exhaust port;
the air inlet is used for conveying air required by reaction into the electric pile;
the air tail gas port is used for discharging air tail gas generated by reaction in the electric pile;
the circulating medium inlet is communicated with the quantitative device and is used for conveying the methanol-water mixed solution into the electric pile;
the circulating medium outlet is communicated with the proportional valve and is used for discharging the vaporized methanol-water mixed steam;
the reforming hydrogen inlet is communicated with the reforming chamber and is used for conveying reforming hydrogen required by reaction into the electric pile;
the reformed hydrogen tail gas port is used for discharging hydrogen tail gas generated by reaction in the electric pile.
In an embodiment of the present invention, the proportional valve is a three-way valve with one inlet and two outlets, and includes an inlet port, a first outlet port, and a second outlet port;
the inlet end is communicated with the electric pile;
the first outlet end is communicated with the cooling device;
the second outlet port is in communication with the reformer chamber.
In an embodiment of the present invention, the detecting device is an intelligent steam meter;
the intelligent steam meter comprises: the device comprises a steam flow detection module, a display screen, an early warning module, an early warning return module, a communication module and a hydrogen leakage detection module;
the steam flow detection module is electrically connected with the display screen, the early warning module, the early warning return module, the communication module and the hydrogen leakage detection module, and is used for acquiring detection data, displaying the detection data through the display screen, and transmitting the detection data to the control device through the communication module; the early warning module is also used for sending an early warning signal to the early warning module when the detection data is abnormal; the early warning return module is also used for sending an early warning return signal to the early warning return module when the detection data is recovered to be normal;
the early warning module is electrically connected with the steam flow detection module and the control device and is used for sending a closing control signal to the control device after receiving the early warning signal sent by the steam flow detection module;
the early warning return module is electrically connected with the steam flow detection module and the control device and is used for sending a starting control signal to the control device after receiving the early warning return signal sent by the steam flow detection module;
the communication module is electrically connected with the control device and is used for transmitting the detection data to the control device;
the hydrogen detection module is electrically connected with the control device and used for giving an alarm when hydrogen in the system leaks and sending a closing control signal to the control device.
In one embodiment of the present invention, the control device comprises a control component and a communication component;
the control component is electrically connected with the communication component, the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device and is used for controlling the opening of the proportional valve according to an opening signal sent by the detection device or controlling the closing of the proportional valve according to a closing signal sent by the detection device and controlling the opening degree and the flow rate of the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device so as to ensure that the whole system is in an optimal working state;
the communication component is in communication connection with the detection device and is used for receiving detection data sent by the detection device.
Some beneficial effects of the utility model can include:
the utility model provides a methanol reforming fuel cell heat utilization system, through being in the same place two systems hookups of methanol-water reforming system and pile power generation system, when the pile normally works, utilize proportioning device to the pile in the quantitative injection of methanol-water mixed solution dispels the heat for the pile, the mixed steam of methanol-water after the vaporization passes through a proportional valve device, the mixed steam of methanol-water after the vaporization is according to a quantitative proportion distribution, partly as reforming chamber hydrogen manufacturing reaction raw materials, it needs the heat absorption process to save the mixed solution of methanol-water and become the mixed steam of methanol-water, hydrogen after the reforming lets in the pile inside again and reacts with oxygen, the mixed steam of methanol-water of another part vaporization gets back to the fuel tank again through cooling device, use with this reciprocal circulation, utilize the mixed solution of methanol-water as the circulating medium of pile, the subassembly quantity of pile heat dissipation circulation system has been reduced, the volume is obviously reduced, the fuel through the circulating medium is the same as the fuel of the whole system, the use of other circulating media is avoided, the cost is reduced, the methanol-water mixed steam after the heat dissipation of the galvanic pile can be directly introduced into the reforming chamber, the heat absorption process required for changing the methanol-water mixed solution into the methanol-water mixed steam is reduced, the heat absorption process in the reforming chamber is changed into a reforming hydrogen production reaction for reacting the methanol-water mixed steam through two reactions, the heat production quantity and the heat absorption quantity of the reforming chamber can be reduced, the heat source control difficulty and the heat control difficulty provided by the reforming chamber can be obviously reduced, meanwhile, the methanol-water mixed solution is used as the fuel and also serves as the circulating medium, one substance has multiple purposes, the fuel tank and the fuel tank can be reused after being cooled, the utilization efficiency is improved, the galvanic pile and the reforming chamber are connected together, the waste heat of the galvanic pile reaction, the energy loss is reduced.
Detecting state parameters such as methanol-water mixed steam pressure, temperature and flow in an air guide pipe in real time by using a detection device, sending detection data to a control device, controlling the proportional valve to be opened by the control device according to an opening signal sent by the detection device or controlling the proportional valve to be closed according to a closing signal sent by the detection device, and controlling the opening degree and the flow rate of the electric pile, the quantifying device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device so as to ensure that the whole system is in an optimal working state; the control device is also used for receiving a closing signal sent by the detection device to control the closing of the proportional valve and the opening of the proportional valve, using the detection device and the control device to ensure the safe and stable operation of the system, using the control device to control the opening of the proportional valve according to the opening signal sent by the detection device or control the closing of the proportional valve according to the closing signal sent by the detection device, and controlling the opening degree and the flow rate of the electric pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device to ensure the optimal working state of the whole system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic structural diagram of a heat utilization system of a methanol reforming fuel cell according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a reforming chamber in a heat utilization system of a methanol reforming fuel cell according to an embodiment of the present invention in a first operation mode;
fig. 3 is a schematic structural diagram of a reforming chamber in a heat utilization system for a methanol reforming fuel cell according to an embodiment of the present invention in a second operation mode.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
In order to overcome the defect that exists among the prior art, the utility model provides a whole fuel cell heat utilization system, including galvanic pile power generation system and methanol-water reforming hydrogen system two parts, wherein, galvanic pile power generation system's main function is the production electric energy, because hydrogen and oxygen take place electrochemical reaction in the galvanic pile can release a large amount of heats, this system is unnecessary heat reuse, utilize the heat to form methanol-water mixed steam with the vaporization of methanol-water mixed solution, methanol-water mixed steam reforms into hydrogen under the high temperature catalysis condition of reformer and regard as galvanic pile power generation system's raw and other materials again, thermal reuse has been realized.
Fig. 1 is a schematic structural diagram of a heat utilization system of a methanol reforming fuel cell according to an embodiment of the present invention. As shown in fig. 1, the present invention provides a heat utilization system for a methanol reforming fuel cell, comprising: the fuel cell comprises a fuel tank, a dosing device, a galvanic pile, a reforming chamber, a cooling device and a proportional valve;
the fuel tank is communicated with the quantitative device and is used for storing the methanol-water mixed solution and conveying the methanol-water mixed solution to the quantitative device;
the quantitative device is communicated with the galvanic pile and is used for conveying the methanol-water mixed solution conveyed by the fuel tank to the galvanic pile;
the galvanic pile is communicated with the reforming chamber and is used for receiving reformed hydrogen conveyed by the reforming chamber, the reformed hydrogen and air generate electrochemical reaction in the galvanic pile to generate electric energy and heat, and methanol-water mixed steam generated in the heat dissipation process is conveyed to the proportional valve;
the proportional valve is communicated with the galvanic pile, the cooling device and the reforming chamber respectively and is used for conveying the methanol-water mixed steam which is received and conveyed by the galvanic pile to the reforming chamber and the cooling device respectively according to a set proportion;
the reforming chamber is used for reforming the methanol-water mixed steam conveyed by the proportional valve to generate reformed hydrogen and conveying the generated reformed hydrogen to the electric pile;
the cooling device is communicated with the fuel tank and is used for cooling and liquefying the methanol-water mixed steam entering the cooling device to form a methanol-water mixed solution and conveying the methanol-water mixed solution to the fuel tank.
The following is a detailed description of the flow direction of the methanol-water mixed solution:
the method comprises the steps that a methanol-water mixed solution stored in a fuel tank firstly enters a quantifying device through a liquid guide pipe, the quantifying device ensures that the methanol-water mixed steam is in a reasonable pressure range and then enters an electric pile through the liquid guide pipe to be subjected to heat dissipation treatment for the electric pile, the quantifying device is used for quantitatively spraying the methanol-water mixed solution into the electric pile to dissipate heat for the electric pile, the vaporized methanol-water mixed steam passes through a proportional valve, the vaporized methanol-water mixed steam is distributed according to a certain proportion, one part of the vaporized methanol-water mixed steam is used as a hydrogen production reaction raw material of a reforming chamber, the heat absorption process required for changing the methanol-water mixed solution into the methanol-water mixed steam is saved, the reformed hydrogen is introduced into the electric pile to react with oxygen, and the other part of the vaporized methanol-water mixed steam returns to.
The material conversion and transmission process between the reforming chamber and the electric pile is as follows:
in general, the fuel used by the stack is pure hydrogen or reformed hydrogen; the oxidant used by the stack is air or pure oxygen, and in the present invention, the preferred stack fuel is reformed hydrogen and air. Reforming hydrogen and air generate electrochemical reaction in the electric pile to generate electric energy and heat; absorbing heat released by electrochemical reaction in the galvanic pile by using a methanol-water mixed solution vaporization evaporation heat absorption mode; the amount of the methanol-water mixed solution entering the galvanic pile is accurately controlled by a control device, and the excessive heat in the galvanic pile is taken out of the galvanic pile by utilizing the vaporization heat absorption of the methanol-water mixed solution while maintaining the temperature required by the normal operation of the galvanic pile; and finally discharging methanol-water mixed steam out of the galvanic pile. The reforming chamber connected with the galvanic pile is filled with a methanol reforming hydrogen production catalyst, methanol-water mixed steam conveyed from the galvanic pile into the reforming chamber is subjected to reforming hydrogen production reaction through the catalyst under certain temperature and pressure conditions to produce reforming hydrogen, and the reforming hydrogen mainly comprises hydrogen, carbon dioxide, trace amount of gases such as water vapor, carbon monoxide and the like. Reformed hydrogen generated by reforming methanol can be used as fuel of the electric pile.
As shown in fig. 2 and 3, the reformer chamber includes two operation modes, i.e., a first operation mode and a second operation mode;
the first working mode is that the reforming chamber is filled with the low-temperature reforming catalyst, the optimal working temperature range of the low-temperature reforming catalyst is consistent with the temperature of the galvanic pile, and the temperature of the methanol-water mixed steam output from the galvanic pile and the proportional valve can meet the temperature required by the normal reaction of the hydrogen production by reforming the methanol without adding other component devices. In this case, the normal operating temperature of the stack is preferably 100 to 200 ℃, and the optimum operating temperature of the low-temperature reforming catalyst is preferably also 100 to 200 ℃.
The second working mode is realized by filling a middle/high temperature reforming catalyst in the reforming chamber and adding a flameless combustion chamber device; the optimal working temperature of the high-temperature reforming catalyst is more than 200 ℃, the reaction temperature of the medium/high-temperature reforming catalyst has a certain difference with the optimal working temperature of the galvanic pile, the temperature required by the normal reaction of the methanol reforming hydrogen production reaction cannot be ensured only by utilizing the temperature of the methanol-water mixed steam discharged from the internal part of the galvanic pile and the proportional valve, a flameless combustion chamber device needs to be added, and the raw materials used by the flameless combustion device can be various raw materials such as pure methanol, methanol-water mixed solution, carbon monoxide, hydrogen and the like; the preferred flameless combustion feedstock herein is the off-gas of reformed hydrogen used by the stack. The flameless combustion chamber is connected with a reformed hydrogen tail gas port of the galvanic pile, the reformed hydrogen tail gas of the galvanic pile still contains partial hydrogen, the partial hydrogen generates flameless combustion reaction in the flameless combustion chamber to release a large amount of heat, and the flameless combustion and the methanol-water mixed steam jointly heat the reforming chamber to ensure that the reforming chamber maintains the optimal temperature required by the high-temperature reforming catalyst so as to maintain the methanol reforming hydrogen production reaction.
It can be understood that: although specific ranges are given for the optimum operating temperature range of the low-temperature reforming catalyst, the temperature of the reforming chamber when the mixed steam of methanol and water enters the reforming chamber after passing through the proportional valve, and the optimum operating temperature of the medium/high-temperature reforming catalyst, the present invention is not limited to this, and only for describing an ideal operating state, the present invention can be more easily understood by those skilled in the art. The skilled person can set the above two operation modes as required, even if the above temperature range is not reached.
In one embodiment of the invention, the system further comprises:
a detection device and a control device;
the detection device is arranged between the galvanic pile and the quantitative device, between the galvanic pile and the proportional valve, between the cooling device and the proportional valve, between the reforming chamber and the galvanic pile, between the cooling device and the fuel tank, and between the fuel tank and the quantitative device, and is used for acquiring detection data and transmitting the detection data to the control device;
the control device is connected with the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device, and controls the operation of each component by using control logic, algorithm and a built-in database system in the control device.
In this embodiment, the detecting device is disposed between the stack and the dosing device, between the stack and the proportional valve, between the cooling device and the proportional valve, between the reforming chamber and the stack, between the cooling device and the fuel tank, and between the fuel tank and the dosing device, and is configured to obtain detection data and transmit the detection data to the control device; the control device is connected with the galvanic pile, the quantifying device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device, normal work of each component is controlled by control logic, an algorithm and a built-in database system in the control device, meanwhile, the control device carries out contrastive analysis on data fed back by the detection device and the database system, and then carries out real-time monitoring, control, fine adjustment or alarm and the like on the working state of each component so as to ensure that the whole system is in an optimal working state and keep high-efficiency working efficiency.
In one embodiment of the present invention, the stack is a high temperature pem fuel cell stack.
In the embodiment, the electric pile is a high-temperature proton exchange membrane fuel cell electric pile, the normal working temperature of the electric pile exceeds 100 ℃, the electric pile has higher CO tolerance, and reformed hydrogen produced in the reforming chamber can be directly used as a reaction raw material; the air and the reformed hydrogen are subjected to electrochemical reaction on a high-temperature proton exchange membrane in the electric pile to generate electric energy and heat, the electric energy can be directly transmitted to an external circuit, and the heat needs to be circularly radiated through a circulating medium to maintain the electric pile at the optimal working temperature.
The galvanic pile comprises an air inlet and an air outlet, a reformed hydrogen inlet and an air outlet, and a circulating medium inlet and an air outlet; the air and reformed hydrogen are subjected to electrochemical reaction on a high-temperature proton exchange membrane in the electric pile to generate electric energy and heat, the electric energy can be directly transmitted to an external circuit, and the heat needs to be dissipated by circulation of a circulating medium so as to maintain the optimal temperature of the electric pile. In the embodiment of the application, the methanol-water mixed solution is selected as a circulating medium, namely a reforming chamber reforming hydrogen production fuel, and a circulating medium for heat dissipation of the galvanic pile, so that the purpose of multiple purposes is achieved, and the quantity of liquid substances used by the system is reduced. The quantifying device is a conveying device for quantifying methanol water, and the methanol water mixed solution is conveyed to the inside of the electric pile and is used for dissipating heat of the electric pile in normal work. The methanol water quantifying device is uniformly controlled by the control device, the control device regulates and controls the delivery capacity of the quantifying device of the methanol water in real time on the basis of the experience of a database in the control device according to the temperature of the galvanic pile detected by the detection system (after the methanol water enters the galvanic pile, the methanol water mixed solution is evaporated into a gaseous state, and the vaporization heat absorption and the steam heat absorption of the methanol water are utilized) so as to ensure that the temperature of the galvanic pile is maintained in a normal working range.
In one embodiment of the present invention, the cell stack is provided with an air inlet, an air exhaust port, a circulating medium inlet, a circulating medium outlet, a reformed hydrogen inlet, and a reformed hydrogen exhaust port;
the air inlet is used for conveying air required by reaction into the electric pile;
the air tail gas port is used for discharging air tail gas generated by reaction in the electric pile;
the circulating medium inlet is communicated with the quantitative device and is used for conveying the methanol-water mixed solution into the electric pile;
the circulating medium outlet is communicated with the proportional valve and is used for discharging the vaporized methanol-water mixed steam;
the reforming hydrogen inlet is communicated with the reforming chamber and is used for conveying reforming hydrogen required by reaction into the electric pile;
the reformed hydrogen tail gas port is used for discharging hydrogen tail gas generated by reaction in the electric pile.
Specifically, the air inlet is used for introducing oxygen in the air into the electric pile to perform catalytic reaction to generate electric energy, the circulating medium inlet of the electric pile is connected with the water outlet of the quantifying device through the liquid guide pipe, the methanol-water mixed solution is quantitatively injected into the electric pile from the fuel tank through the quantifying device to dissipate heat of the electric pile, the methanol-water mixed steam formed after vaporization is divided into two parts according to a certain proportion through the proportional valve, one part is used as a reaction raw material for hydrogen production in the reforming chamber through the air guide pipe, the heat absorption process required for changing the methanol-water mixed solution into the methanol-water mixed steam can be saved, and the reformed hydrogen is introduced into the electric pile from the hydrogen inlet through the air guide pipe to react with the oxygen to generate; the other part of the vaporized methanol-water mixed steam is returned to the fuel tank from the liquid guide pipe through the cooling device for recycling.
In an embodiment of the present invention, the proportional valve is a three-way valve with one inlet and two outlets, and includes an inlet port, a first outlet port, and a second outlet port;
the inlet end is communicated with the electric pile;
the first outlet end is communicated with the cooling device;
the second outlet port is in communication with the reformer chamber.
In this embodiment, the methanol-water mixed steam from the electric pile enters the proportional valve through the inlet end, and at this time, the detection device acquires detection data and transmits the detection data to the control device; and then comparing the detection data with data in a database in the control device, and regulating and controlling the opening degree and flow rate of the proportional valve, so as to respectively control the output proportion of the methanol-water mixed steam of the first outlet end and the second outlet end, thereby realizing the control of the proportion of the methanol-water mixed steam entering the cooling device and the reforming chamber.
In an embodiment of the present invention, the detecting device is an intelligent steam meter;
the intelligent steam meter comprises: the device comprises a steam flow detection module, a display screen, an early warning module, an early warning return module, a communication module and a hydrogen leakage detection module;
the steam flow detection module is electrically connected with the display screen, the early warning module, the early warning return module, the communication module and the hydrogen leakage detection module, and is used for acquiring detection data, displaying the detection data through the display screen, and transmitting the detection data to the control device through the communication module; the early warning module is also used for sending an early warning signal to the early warning module when the detection data is abnormal; the early warning return module is also used for sending an early warning return signal to the early warning return module when the detection data is recovered to be normal;
the early warning module is electrically connected with the steam flow detection module and the control device and is used for sending a closing control signal to the control device after receiving the early warning signal sent by the steam flow detection module;
the early warning return module is electrically connected with the steam flow detection module and the control device and is used for sending a starting control signal to the control device after receiving the early warning return signal sent by the steam flow detection module;
the communication module is electrically connected with the control device and is used for transmitting the detection data to the control device;
the hydrogen detection module is electrically connected with the control device and used for giving an alarm when hydrogen in the system leaks and sending a closing control signal to the control device.
In the above embodiment, the hydrogen detection module is electrically connected to the control device, and the hydrogen detection module includes a hydrogen detection function, an alarm function, and a quick exhaust function. The hydrogen detection module needs to monitor whether hydrogen in the whole system leaks in real time, if the hydrogen leakage occurs, the hydrogen detection module needs to give an alarm in time and transmit the alarm to the control device through the communication module, and the control device controls the working state of each part for system shutdown; in addition, the control device controls the starting of the exhaust device to exhaust the leaked hydrogen in the system out of the device so as to ensure safety.
In one embodiment of the present invention, the control device comprises a control component and a communication component;
the control component is electrically connected with the communication component, the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device and is used for controlling the opening of the proportional valve according to an opening signal sent by the detection device or controlling the closing of the proportional valve according to a closing signal sent by the detection device and controlling the opening degree and the flow rate of the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device so as to ensure that the whole system is in an optimal working state;
the communication component is in communication connection with the detection device and is used for receiving detection data sent by the detection device.
Wherein, the detection data that detection device sent includes: flow rate of gas, pressure of gas, temperature of gas, whether gas leaks, gas discharge, etc.
Specifically, the control device comprises a control component and a communication component; the control assembly is connected with the communication assembly, the detection device and the proportional valve and is used for controlling the proportional valve to be opened according to an opening control signal sent by the detection device or controlling the proportional valve to be closed according to a closing control signal sent by the detection device and controlling the opening degree and the flow rate of the galvanic pile, the quantifying device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to detection data sent by the detection device so as to ensure that the whole system is in an optimal working state; and the communication component is in communication connection with the control device and is used for receiving the detection data sent by the detection device. Utilize controlling means can accurate control proportional valve, realize the accurate control of methanol-water mixed steam's flow.
The control device is used for overall management of the whole system, and controls the opening degree and the flow rate of the galvanic pile, the quantifying device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device so as to ensure that the whole system is in an optimal working state.
Some beneficial effects of the utility model can include:
the utility model provides a methanol reforming fuel cell heat utilization system, through being in the same place two systems hookups of methanol-water reforming system and pile power generation system, when the pile normally works, utilize proportioning device to the pile in the quantitative injection of methanol-water mixed solution dispels the heat for the pile, the mixed steam of methanol-water after the vaporization passes through a proportional valve device, the mixed steam of methanol-water after the vaporization is according to a quantitative proportion distribution, partly as reforming chamber hydrogen manufacturing reaction raw materials, it needs the heat absorption process to save the mixed solution of methanol-water and become the mixed steam of methanol-water, hydrogen after the reforming lets in the pile inside again and reacts with oxygen, the mixed steam of methanol-water of another part vaporization gets back to the fuel tank again through cooling device, use with this reciprocal circulation, utilize the mixed solution of methanol-water as the circulating medium of pile, the subassembly quantity of pile heat dissipation circulation system has been reduced, the volume is obviously reduced, the fuel through the circulating medium is the same as the fuel of the whole system, the use of other circulating media is avoided, the cost is reduced, the methanol-water mixed steam after the heat dissipation of the galvanic pile can be directly introduced into the reforming chamber, the heat absorption process required for changing the methanol-water mixed solution into the methanol-water mixed steam is reduced, the heat absorption process in the reforming chamber is changed into a reforming hydrogen production reaction for reacting the methanol-water mixed steam through two reactions, the heat production quantity and the heat absorption quantity of the reforming chamber can be reduced, the heat source control difficulty and the heat control difficulty provided by the reforming chamber can be obviously reduced, meanwhile, the methanol-water mixed solution is used as the fuel and also serves as the circulating medium, one substance has multiple purposes, the fuel tank and the fuel tank can be reused after being cooled, the utilization efficiency is improved, the galvanic pile and the reforming chamber are connected together, the waste heat of the galvanic pile reaction, the energy loss is reduced.
Detecting the flow of the methanol-water mixed steam in the air guide pipe in real time by using a detection device, sending detection data to a control device, controlling the proportional valve to be opened by the control device according to an opening signal sent by the detection device or controlling the proportional valve to be closed according to a closing signal sent by the detection device, and controlling the opening degree and the flow rate of the galvanic pile, the quantifying device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device so as to ensure that the whole system is in an optimal working state; the control device is also used for receiving a closing signal sent by the detection device to control the closing of the proportional valve and the opening of the proportional valve, using the detection device and the control device to ensure the safe and stable operation of the system, using the control device to control the opening of the proportional valve according to the opening signal sent by the detection device or control the closing of the proportional valve according to the closing signal sent by the detection device, and controlling the opening degree and the flow rate of the electric pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device to ensure the optimal working state of the whole system.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A methanol reforming fuel cell heat utilization system, comprising:
the fuel cell comprises a fuel tank, a dosing device, a galvanic pile, a reforming chamber, a cooling device and a proportional valve;
the fuel tank is communicated with the quantitative device and is used for storing the methanol-water mixed solution and conveying the methanol-water mixed solution to the quantitative device;
the quantitative device is communicated with the galvanic pile and is used for conveying the methanol-water mixed solution conveyed by the fuel tank to the galvanic pile;
the galvanic pile is communicated with the reforming chamber and is used for receiving reformed hydrogen conveyed by the reforming chamber, the reformed hydrogen and air generate electrochemical reaction in the galvanic pile to generate electric energy and heat, and methanol-water mixed steam generated in the heat dissipation process is conveyed to the proportional valve;
the proportional valve is communicated with the galvanic pile, the cooling device and the reforming chamber respectively and is used for conveying the methanol-water mixed steam which is received and conveyed by the galvanic pile to the reforming chamber and the cooling device respectively according to a set proportion;
the reforming chamber is used for reforming the methanol-water mixed steam conveyed by the proportional valve to generate reformed hydrogen and conveying the generated reformed hydrogen to the electric pile;
the cooling device is communicated with the fuel tank and is used for cooling and liquefying the methanol-water mixed steam entering the cooling device to form a methanol-water mixed solution and conveying the methanol-water mixed solution to the fuel tank.
2. The methanol reforming fuel cell heat utilization system of claim 1, further comprising: a detection device and a control device;
the detection device is arranged between the galvanic pile and the quantitative device, between the galvanic pile and the proportional valve, between the cooling device and the proportional valve, between the reforming chamber and the galvanic pile, between the cooling device and the fuel tank, and between the fuel tank and the quantitative device, and is used for acquiring detection data and transmitting the detection data to the control device;
the control device is connected with the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device, and controls the operation of each component by using control logic, algorithm and a built-in database system in the control device.
3. The heat utilization system of a methanol reforming fuel cell of claim 1, wherein the stack is a high temperature pem fuel cell stack.
4. The methanol reforming fuel cell heat utilization system according to claim 1 or 2, wherein the stack is provided with an air inlet, an air exhaust, a circulating medium inlet, a circulating medium outlet, and a reformed hydrogen inlet and a reformed hydrogen exhaust;
the air inlet is used for conveying air required by reaction into the electric pile;
the air tail gas port is used for discharging air tail gas generated by reaction in the electric pile;
the circulating medium inlet is communicated with the quantitative device and is used for conveying the methanol-water mixed solution into the electric pile;
the circulating medium outlet is communicated with the proportional valve and is used for discharging the formed methanol-water mixed steam;
the reforming hydrogen inlet is communicated with the reforming chamber and is used for conveying reforming hydrogen required by reaction into the electric pile;
the reformed hydrogen tail gas port is used for discharging hydrogen tail gas generated by reaction in the electric pile.
5. The methanol reforming fuel cell heat utilization system of claim 1, wherein the proportional valve is a one-in-two-out three-way valve comprising an inlet port, a first outlet port, and a second outlet port;
the inlet end is communicated with the electric pile;
the first outlet end is communicated with the cooling device;
the second outlet port is in communication with the reformer chamber.
6. The methanol reforming fuel cell heat utilization system of claim 2, wherein the detection device is an intelligent steam meter;
the intelligent steam meter comprises: the device comprises a steam flow detection module, a display screen, an early warning module, an early warning return module, a communication module and a hydrogen leakage detection module;
the steam flow detection module is electrically connected with the display screen, the early warning module, the early warning return module and the communication module, and is used for acquiring detection data, displaying the detection data through the display screen and transmitting the detection data to the control device through the communication module; the early warning module is also used for sending an early warning signal to the early warning module when the detection data is abnormal; the early warning return module is also used for sending an early warning return signal to the early warning return module when the detection data is recovered to be normal;
the early warning module is electrically connected with the steam flow detection module and the control device and is used for sending a closing control signal to the control device after receiving the early warning signal sent by the steam flow detection module;
the early warning return module is electrically connected with the steam flow detection module and the control device and is used for sending a starting control signal to the control device after receiving the early warning return signal sent by the steam flow detection module;
the communication module is electrically connected with the control device and is used for transmitting the detection data to the control device;
the hydrogen leakage detection module is electrically connected with the control device and used for giving an alarm when hydrogen in the system leaks.
7. The methanol reforming fuel cell heat utilization system of claim 2, wherein the control means comprises a control assembly and a communication assembly;
the control assembly is electrically connected with the communication assembly, the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device and is used for controlling the opening of the proportional valve according to an opening signal sent by the detection device or controlling the closing of the proportional valve according to a closing signal sent by the detection device and controlling the opening degree and the flow rate of the galvanic pile, the quantitative device, the proportional valve, the cooling device, the reforming chamber, the fuel tank and the detection device according to the detection data sent by the detection device;
the communication component is in communication connection with the detection device and is used for receiving detection data sent by the detection device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900445A (en) * | 2020-08-05 | 2020-11-06 | 强伟氢能科技有限公司 | A refrigerating system for methanol-water reforming electricity generation |
| CN112397751A (en) * | 2020-11-04 | 2021-02-23 | 江苏科技大学 | Methanol reforming solid oxide fuel cell system and working method |
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2019
- 2019-10-09 CN CN201921686043.4U patent/CN210576245U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900445A (en) * | 2020-08-05 | 2020-11-06 | 强伟氢能科技有限公司 | A refrigerating system for methanol-water reforming electricity generation |
| CN112397751A (en) * | 2020-11-04 | 2021-02-23 | 江苏科技大学 | Methanol reforming solid oxide fuel cell system and working method |
| CN112397751B (en) * | 2020-11-04 | 2022-03-08 | 江苏科技大学 | Methanol reforming solid oxide fuel cell system and working method |
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