CN117832556A - SOFC power generation system for methanol-water combustion reforming - Google Patents
SOFC power generation system for methanol-water combustion reforming Download PDFInfo
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- CN117832556A CN117832556A CN202311727276.5A CN202311727276A CN117832556A CN 117832556 A CN117832556 A CN 117832556A CN 202311727276 A CN202311727276 A CN 202311727276A CN 117832556 A CN117832556 A CN 117832556A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 121
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000002407 reforming Methods 0.000 title claims abstract description 92
- 238000010248 power generation Methods 0.000 title claims abstract description 79
- 239000001257 hydrogen Substances 0.000 claims abstract description 85
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 85
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims description 173
- 238000006243 chemical reaction Methods 0.000 claims description 65
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 59
- 239000003546 flue gas Substances 0.000 claims description 52
- 230000008016 vaporization Effects 0.000 claims description 35
- 238000009834 vaporization Methods 0.000 claims description 26
- 239000000446 fuel Substances 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 238000006057 reforming reaction Methods 0.000 claims description 21
- 239000006200 vaporizer Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000011217 control strategy Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 63
- 229910002091 carbon monoxide Inorganic materials 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000003487 electrochemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
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- Fuel Cell (AREA)
Abstract
The invention discloses a SOFC power generation system for methanol-water combustion reforming, which relates to the SOFC power generation control field, and comprises a methanol-water supply module, a reforming module, a hydrogen heating module, an air supply module, a combustion module and an SOFC electric pile module, wherein the methanol-water supply module is connected with the reforming module, the reforming module is also connected with the combustion module and the hydrogen heating module, the air supply module is respectively connected with the hydrogen heating module, the combustion module and the SOFC electric pile module, and the SOFC electric pile module is also connected with the hydrogen heating module and the combustion module.
Description
Technical Field
The invention relates to the technical field of SOFC power generation control, in particular to a SOFC power generation system for reforming methanol water through combustion.
Background
SOFC (Solid Oxide Fuel Cell ) utilizes electrochemical reaction to discharge, and an SOFC power generation system relying on methanol water is to reform the methanol water into hydrogen, ionize the hydrogen ions under the action of a cell unit, combine with oxygen ions of air in a cathode to generate water and release electric energy, so that the whole process is efficient, the fuel is clean and environment-friendly, and the method is one of important modes for utilizing new energy in the future. The reaction equation for hydrogen production by means of methanol-water reforming is: ch3oh+h2o→co2+3h2, the conversion temperature is 220 to 280 ℃, and the whole reaction process is endothermic, so that a heat source is required to be provided for the reforming reaction. The heating modes of the prior methanol-water reforming hydrogen production equipment mainly comprise the following three modes:
the first is an electric heating mode, but the mode requires additional power consumption, so that the overall operation efficiency of the SOFC power generation system applying the mode is low; the second mode of supplying heat for fuel combustion is that a fuel supply channel is additionally arranged, pure methanol is added into the channel as fuel, heat is directly released by combustion, and the tail gas after combustion does not enter a pile to participate in electrochemical reaction and discharge, so that the power generation efficiency of the SOFC power generation system is reduced; the third mode is a mode of hydrogen production by tail gas catalytic combustion reforming, but the corresponding system structure of the mode is complex, the maintenance is inconvenient, the temperature rise is slower, the temperature is not easy to control, and the application of the SOFC power generation system is not facilitated.
Therefore, how to design a more efficient SOFC power generation system that is beneficial for practical applications is a current challenge.
Disclosure of Invention
The invention solves the problems that: the SOFC power generation system for the methanol-water combustion reforming has the advantages that the whole power generation system forms heat circulation to ensure the normal operation and efficient power generation of the reforming module and the combustion module, and a path of pure methanol supply passage is not required to be additionally arranged for inputting pure methanol to carry out combustion heat supply, so that the SOFC power generation system is more beneficial to practical application.
In order to solve the above problems, the present invention provides an SOFC power generation system for reforming methanol-water combustion, which comprises a methanol-water supply module, a reforming module, a hydrogen heating module, an air supply module, a combustion module and an SOFC stack module;
the methanol water supply module is connected with the reforming module, the reforming module is also connected with the combustion module and the hydrogen heating module respectively, the air supply module is connected with the hydrogen heating module, the combustion module and the SOFC pile module respectively, and the SOFC pile module is also connected with the hydrogen heating module and the combustion module;
the reforming module is used for carrying out endothermic reforming reaction according to the methanol water provided by the methanol water supply module under the heat assistance of the flue gas tail gas at the third temperature so as to generate first hydrogen-rich gas;
the combustion module is used for combusting according to the input first hydrogen-rich gas, anode tail gas and cathode tail gas output by the SOFC stack module so as to obtain combustion tail gas at a first temperature;
the air supply module is used for heating the input air by utilizing the combustion tail gas with the first temperature to obtain hot air, outputting the hot air to a cathode air inlet of the SOFC stack module, converting the combustion tail gas with the first temperature into combustion tail gas with a second temperature, and outputting the combustion tail gas with the first temperature to the hydrogen heating module, wherein the second temperature is smaller than the first temperature;
the hydrogen heating module is used for heating the first hydrogen-rich gas by utilizing the combustion tail gas with the second temperature to obtain second hydrogen-rich gas, outputting the second hydrogen-rich gas to an anode air inlet of the SOFC stack module, converting the combustion tail gas with the second temperature into flue gas tail gas with the third temperature, and outputting the flue gas tail gas to the reforming module, wherein the third temperature is smaller than the second temperature;
the SOFC pile module is used for generating direct current according to the reaction of the hot air and the second hydrogen-rich gas, and outputting the anode tail gas and the cathode tail gas generated by the reaction to the combustion module.
The beneficial effects of the invention are as follows: the anode tail gas, the cathode tail gas and the first hydrogen-rich gas are mixed and combusted in the combustion module, so that the problem that the anode tail gas and the cathode tail gas cannot be ignited only by virtue of the anode tail gas and the cathode tail gas is solved, and the system efficiency corresponding to the combustion mode in the application is higher than that of the mode of only introducing fuel for combustion and heat supply; therefore, the whole power generation system of the application forms heat circulation to ensure that the reforming module and the combustion module work normally and generate power with high efficiency, and a path of pure methanol supply passage is not required to be additionally arranged for inputting pure methanol to perform combustion heat supply, so that the system is more beneficial to practical application.
Further, the SOFC power generation system further comprises a temperature adjustment module;
and one port of the temperature regulating module is connected with the tail gas output port of the combustion module, and the other port of the temperature regulating module is connected with the tail gas input port of the air supply module and is used for adding air into the combustion tail gas at the first temperature to cool when the first temperature is greater than a preset temperature allowable threshold.
In this scheme, can be when the temperature of combustion module is too high through the setting of temperature adjustment module to add the form of air and cool down, and then reduced the temperature of the equipment that combustion module corresponds, realized the self-adaptation of combustion temperature and adjusted.
Further, the temperature adjusting module comprises a temperature adjusting fan and a temperature adjusting cavity;
the air inlet of the temperature regulating fan is used for entering air, and the air outlet of the temperature regulating fan is connected with the air inlet of the temperature regulating cavity;
the tail gas input port of the temperature adjusting cavity is connected with the tail gas output port of the combustion module, and the tail gas output port of the temperature adjusting cavity is connected with the tail gas input port of the air supply module.
Further, the SOFC power generation system further comprises an oxygen monitoring module which is arranged at the tail gas output port of the combustion module and connected with the control module, and is used for monitoring the oxygen content in the combustion tail gas at the first temperature and sending the oxygen content to the control module.
Further, the air supply module comprises an air supply fan and an air preheater;
the air inlet of the air supply fan is used for entering air, the air outlet of the air supply fan is connected with the air inlet of the air preheater, the control port of the air supply fan is connected with the control module and used for regulating and controlling the air quantity fed in by the air supply fan according to a control signal issued by the control module, and the control signal is determined according to the monitored oxygen content;
the hot air output port of the air preheater is connected with the cathode air inlet of the SOFC stack module, the tail gas input port of the air preheater is connected with the tail gas output port of the combustion module, and the tail gas output port of the air preheater is connected with the tail gas input port of the hydrogen heating module.
In this scheme, the oxygen content of the burning tail gas of first temperature has been monitored through the setting of oxygen monitoring module, be convenient for judge whether hydrogen and carbon monoxide in first hydrogen-rich gas, the positive pole tail gas are complete burning according to this oxygen content, so that the air quantity that the air feed fan in the follow-up control air supply module lets in satisfies complete burning, realized the automatic adaptation of complete burning, prevent hydrogen and the carbon monoxide direct emission to the atmosphere in the positive pole tail gas, polluted environment.
Further, the SOFC power generation system further comprises an electric energy conversion module;
the input end of the electric energy conversion module is connected with the electric energy output end of the SOFC electric energy module, and the output end of the electric energy conversion module is connected with a load and is used for carrying out electric energy conversion on the direct current according to the power consumption requirement of the load.
In this scheme, can realize electric energy conversion through this setting to for the load of various power consumption demands supplies power, laminating is practical.
Further, the methanol water supply module comprises a methanol water tank and a methanol water pump;
the output port of the methanol water tank is connected with the input port of the methanol water pump, and the output port of the methanol water pump is connected with the fuel input port of the reforming module.
In this scheme, can simply reliably realize the water yield and the velocity of flow regulation of inflow methanol water through the methanol water pump.
Further, the SOFC power generation system also comprises a preheating vaporization module;
the preheating vaporization module is respectively connected with the methanol water supply module and the reforming module, and is used for vaporizing the methanol water provided by the methanol water supply module into methanol water vapor meeting the reaction temperature of the endothermic reforming reaction of the reforming module, converting the flue gas tail gas at the fourth temperature input by the reforming module into the flue gas tail gas at the fifth temperature, and then discharging the flue gas tail gas, wherein the fifth temperature is smaller than the fourth temperature;
the reforming module is specifically configured to perform an endothermic reforming reaction according to the methanol steam with the aid of the flue gas tail gas at the third temperature to generate a first hydrogen-rich gas, and convert the flue gas tail gas at the third temperature into the flue gas tail gas at the fourth temperature and output the flue gas tail gas to the preheating vaporization module.
In the scheme, on one hand, when the SOFC power generation system is started, although equipment of the reforming module is still at room temperature, methanol water can be vaporized to the reaction temperature required by the endothermic reforming reaction in a short time by virtue of the arrangement of the preheating vaporization module, so that the starting time of the SOFC power generation system is greatly shortened; on the other hand, after the SOFC power generation system is started and the temperature is stable, the methanol vapor obtained by vaporization and the flue gas tail gas at the third temperature jointly ensure the reliable progress of the endothermic reforming reaction so as to obtain the first hydrogen-rich gas.
Further, the preheating vaporization module comprises a PTC heater and a vaporizer;
the input port of the PTC heater is connected with the output port of the methanol-water supply module, the output port of the PTC heater is connected with the fuel input port of the vaporizer, and the PTC heater is used for vaporizing the methanol-water provided by the methanol-water supply module into the methanol-water vapor meeting the reaction temperature of the endothermic reforming reaction of the reforming module when the working temperature of the reforming module is not within the allowable range of the preset reaction temperature, so that the methanol-water vapor is output to the reforming module through the vaporizer; stopping vaporization when the working temperature is within the allowable range of the preset reaction temperature;
the fuel output port of the vaporizer is connected with the fuel input port of the reforming module, and the tail gas input port of the vaporizer is connected with the tail gas output port of the reforming module, so that the methanol water is vaporized into methanol water vapor meeting the reaction temperature under the assistance of the flue gas tail gas at the fourth temperature when the working temperature is within the allowable range of the preset reaction temperature; and the flue gas tail gas at the fourth temperature is changed into the flue gas tail gas at the fifth temperature and then is discharged through a tail gas outlet of the flue gas tail gas boiler.
Further, the SOFC power generation system further comprises a first controllable switch module and a second controllable switch module;
the first port of the first controllable switch module is connected with the hydrogen output port of the reforming module, and the second port of the first controllable switch module is connected with the hydrogen input port of the hydrogen heating module and is used for being turned off when the working temperature is not within the preset reaction temperature allowable range and being turned on and off according to a preset combustion-power generation control strategy when the working temperature is within the preset reaction temperature allowable range;
the first port of the second controllable switch module is connected with the hydrogen output port of the reforming module, and the second port of the second controllable switch module is connected with the hydrogen input port of the fuel module and is used for conducting when the working temperature is not within the preset reaction temperature allowable range, and conducting and switching off according to the preset combustion-power generation control strategy when the working temperature is within the preset reaction temperature allowable range.
In this scheme, can guarantee through the setting of first controllable switch module and second controllable switch module that SOFC power generation system can freely switch and distribute between burning and power generation two-way, can adapt to different start-up, power generation and standby condition better.
Drawings
Fig. 1 is a schematic structural diagram of a SOFC power generation system with methanol-water combustion reforming provided by the invention;
FIG. 2 is a schematic diagram of another SOFC power generation system with methanol-water combustion reforming according to the present invention;
reference numerals illustrate:
the device comprises a 1-methanol water supply module, a 2-reforming module, a 3-hydrogen heating module, a 4-air supply module, a 5-combustion module, a 6-SOFC stack module, a 7-temperature adjustment module, a 71-temperature adjustment fan, a 72-temperature adjustment cavity, an 8-oxygen monitoring module, a 41-air supply fan, a 42-air preheater, a 91-electric energy conversion module, a 92-load, a 11-methanol water tank, a 12-methanol water pump, a 10-preheating vaporization module, a 101-PTC heater, a 102-vaporizer, a 111-first controllable switch module, a 112-second controllable switch module, a 113-power generation channel and a 114-fuel channel.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an SOFC power generation system with methanol-water combustion reforming according to the present invention.
The invention provides an embodiment, a SOFC power generation system for methanol water combustion reforming, which comprises a methanol water supply module 1, a reforming module 2, a hydrogen heating module 3, an air supply module 4, a combustion module 5 and an SOFC stack module 6;
the methanol water supply module 1 is connected with the reforming module 2, the reforming module 2 is also connected with the combustion module 5 and the hydrogen heating module 3 respectively, the air supply module 4 is connected with the hydrogen heating module 3, the combustion module 5 and the SOFC pile module 6 respectively, and the SOFC pile module 6 is also connected with the hydrogen heating module 3 and the combustion module 5;
the reforming module 2 is used for carrying out an endothermic reforming reaction according to the methanol water provided by the methanol water supply module 1 under the heat assistance of the flue gas tail gas at the third temperature to generate a first hydrogen-rich gas;
the combustion module 5 is used for burning according to the input first hydrogen-rich gas, the anode tail gas and the cathode tail gas output by the SOFC stack module 6 to obtain combustion tail gas at a first temperature;
the air supply module 4 is configured to heat the input air by using the combustion tail gas with a first temperature to obtain hot air, output the hot air to the cathode air inlet of the SOFC stack module 6, and output the combustion tail gas with the first temperature to the hydrogen heating module 3 after changing the combustion tail gas with the first temperature into the combustion tail gas with a second temperature, where the second temperature is less than the first temperature;
the hydrogen heating module 3 is configured to heat the first hydrogen-rich gas by using the combustion tail gas at the second temperature to obtain the second hydrogen-rich gas, output the second hydrogen-rich gas to an anode air inlet of the SOFC stack module 6, and output the second combustion tail gas to the reforming module 2 after being changed into a flue gas tail gas at a third temperature, where the third temperature is less than the second temperature;
the SOFC stack module 6 is configured to react with the hot air and the second hydrogen-rich gas to generate direct current, and output anode tail gas and cathode tail gas generated by the reaction to the combustion module 5.
In particular, the reforming module 2 here may be a methanol reformer; it can be understood that, for the reforming module 2, the reforming reaction is specifically an endothermic reaction, and after the start-up of the reforming module is completed and the normal operation is completed, the flue gas tail gas at the third temperature can be used as heat assist to finally generate the first hydrogen-rich gas; of course, in order to ensure that the reaction temperature at which the endothermic reforming reaction of the reforming module 2 occurs is reached, the methanol water may be vaporized by a vaporizer 102 in a preset vaporization module described below to obtain methanol water vapor reaching the reaction temperature.
The hydrogen heating module 3 can be a hydrogen superheater, the combustion module 5 can be a combustor, the reaction performed by the SOFC stack module 6 is electrochemical reaction, generated anode tail gas comprises hydrogen and carbon monoxide which do not participate in the electrochemical reaction, the cathode tail gas contains excessive air-carried oxygen, and if the tail gas is directly discharged, environmental pollution can be caused, and meanwhile, resource waste is also caused.
It should be further noted that, the combustion tail gas has higher heat and can be utilized, so that the tail gas with the first temperature generated by the combustion module 5 is subjected to primary heat exchange through the air supply module 4 to obtain the combustion tail gas with the second temperature (still higher waste heat at the moment), the combustion tail gas with the second temperature is subjected to secondary heat exchange through the hydrogen heating module 3 to obtain the flue gas with the third temperature (still higher temperature at the moment), the flue gas with the third temperature is subjected to tertiary heat exchange through the reforming module 2 to obtain the flue gas with the fourth temperature, and further, when the SOFC power generation system further comprises the preheating and vaporizing module 10, the flue gas with the fourth temperature is subjected to quaternary heat exchange through the preheating and vaporizing module 10 to obtain the flue gas with the fifth temperature for discharging, and the multiple heat exchanges ensure that the temperature of the finally discharged flue gas with the fifth temperature is obviously reduced, the heat value is reduced, and the environment is not polluted.
In summary, the application provides a SOFC power generation system for methanol-water combustion reforming, and the whole power generation system forms heat circulation to ensure that the reforming module 2 and the combustion module 5 work normally and generate power with high efficiency, and a path of pure methanol supply passage is not required to be additionally arranged for inputting pure methanol to perform combustion heat supply, so that the SOFC power generation system is more beneficial to practical application.
As a preferred embodiment, the SOFC power generation system further comprises a temperature regulating module 7;
one port of the temperature adjusting module 7 is connected with a tail gas output port of the combustion module 5, and the other port of the temperature adjusting module 7 is connected with a tail gas input port of the air supply module 4 and is used for adding air into the combustion tail gas at the first temperature to cool when the first temperature is greater than a preset temperature allowable threshold.
In this embodiment, further consider that in the process of producing hydrogen by reforming methanol by means of fuel combustion in the prior art, the temperature of the combustion chamber of the burner is difficult to control, the combustion temperature is easy to raise, but the temperature is slow, and when the combustion chamber is at too high temperature (for example, greater than 1000 ℃), the service life of the burner is affected. For this reason, this SOFC power generation system of application design still includes temperature regulating module 7, when the temperature of combustion module 5 is too high to add the form of air and cool down, and then reduced the temperature of the equipment (i.e. combustor) that combustion module 5 corresponds, realized the self-adaptation of combustion temperature and adjusted.
As a preferred embodiment, the temperature adjusting module 7 comprises a temperature adjusting fan 71 and a temperature adjusting cavity 72;
the air inlet of the temperature-adjusting fan 71 is used for entering air, and the air outlet of the temperature-adjusting fan 71 is connected with the air inlet of the temperature-adjusting cavity 72;
the tail gas input port of the temperature adjusting cavity 72 is connected with the tail gas output port of the combustion module 5, and the tail gas output port of the temperature adjusting cavity 72 is connected with the tail gas input port of the air supply module 4.
Specifically, the temperature adjusting fan 71 can be controlled by the control module, and when the control module determines that the temperature of the combustion tail gas exhausted by the burner is too high, the temperature adjusting fan 71 is started and the rotating speed is controlled, so that air can enter, self-adaptive adjustment of the combustion temperature is simply and reliably realized, and the degree of automation is high.
As a preferred embodiment, the SOFC power generation system further comprises an oxygen monitoring module 8 provided at the exhaust outlet of the combustion module 5 and connected to the control module, for monitoring the oxygen content in the combustion exhaust at the first temperature and sending the oxygen content to the control module.
As a preferred embodiment, the air supply module 4 includes an air supply fan 41 and an air preheater 42;
the air inlet of the air supply fan 41 is used for entering air, the air outlet of the air supply fan 41 is connected with the air inlet of the air preheater 42, the control port of the air supply fan 41 is connected with the control module and used for regulating and controlling the air quantity which is fed in by the air supply fan according to the control signal issued by the control module, and the control signal is determined according to the monitored oxygen content;
the hot air output port of the air preheater 42 is connected with the cathode air inlet of the SOFC stack module 6, the tail gas input port of the air preheater 42 is connected with the tail gas output port of the combustion module 5, and the tail gas output port of the air preheater 42 is connected with the tail gas input port of the hydrogen heating module 3.
Specifically, considering that the anode exhaust gas contains carbon monoxide, if the anode exhaust gas is not combusted sufficiently in the combustion module 5 and is also harmful to the environment after being exhausted, the oxygen monitoring module 8 is configured to detect the oxygen content of the combustion exhaust gas at the first temperature, where the oxygen monitoring module 8 may be an oxygen sensor.
More specifically, the oxygen monitoring module 8 may be connected with a control module, where the control module determines whether the first hydrogen-rich gas and the hydrogen and the carbon monoxide in the anode tail gas are completely combusted according to the oxygen content, so that the air amount introduced by the air supply fan 41 is controlled to meet the complete combustion, thereby realizing automatic adaptation of complete combustion and preventing the hydrogen and the carbon monoxide in the anode tail gas from being directly discharged to the atmosphere and polluting the environment.
As a preferred embodiment, the SOFC power generation system further comprises an electrical energy conversion module 91;
the input end of the electric energy conversion module 91 is connected with the electric energy output end of the SOFC electric energy module, and the output end of the electric energy conversion module 91 is connected with the load 92 for carrying out electric energy conversion on direct current according to the electricity demand of the load 92.
Specifically, the power conversion module 91 may be a DC-DC converter (Direct Current-Direct Current) or a DC-AC converter (Direct Current-Alternating Current, direct Current-to-Direct Current); the load 92 may be an external power load 92 or a battery to store power in the battery.
It can be seen that by this arrangement, electrical energy conversion can be achieved to power the various loads 92 for electricity demand, fitting the application reality.
As a preferred embodiment, the methanol water supply module 1 includes a methanol water tank 11 and a methanol water pump 12;
the output port of the methanol water tank 11 is connected with the input port of the methanol water pump 12, and the output port of the methanol water pump 12 is connected with the fuel input port of the reforming module 2.
Specifically, the methanol water pump 12 may be connected to the control module, so as to adjust the amount and flow rate of the methanol water flowing in under the control of the control module.
As a preferred embodiment, the SOFC power generation system further includes a preheat vaporization module 10;
the preheating vaporization module 10 is respectively connected with the methanol water supply module 1 and the reforming module 2, and is used for vaporizing the methanol water provided by the methanol water supply module 1 into methanol water vapor meeting the reaction temperature of the endothermic reforming reaction of the reforming module 2, converting the flue gas tail gas at the fourth temperature input by the reforming module 2 into the flue gas tail gas at the fifth temperature, and then discharging the flue gas tail gas at the fifth temperature, wherein the fifth temperature is smaller than the fourth temperature;
the reforming module 2 is specifically configured to perform an endothermic reforming reaction according to methanol steam with the assistance of the flue gas tail gas at the third temperature to generate a first hydrogen-rich gas, and convert the flue gas tail gas at the third temperature into the flue gas tail gas at the fourth temperature and output the flue gas tail gas to the preheat vaporization module 10.
In this embodiment, considering that in the prior art, the methanol reformer is usually located at the end of heat exchange of the combustion flue gas, and a mode of supplying heat through fuel combustion is adopted, so that the starting time of the methanol reformer is longer. Specifically, when the SOFC power generation system is started, the methanol reformer serving as the reforming module 2 is still at room temperature, and the arrangement of the preheating vaporization module 10 ensures that when the SOFC power generation system is started, although equipment of the reforming module 2 is still at room temperature, methanol water can be vaporized to a reaction temperature required by an endothermic reforming reaction in a short time by virtue of the arrangement of the preheating vaporization module 10, so that the starting time of the SOFC power generation system is greatly shortened; on the other hand, after the starting completion temperature of the SOFC power generation system is stable, the methanol vapor obtained by vaporization and the flue gas tail gas at the third temperature jointly ensure the reliable progress of the endothermic reforming reaction so as to obtain the first hydrogen-rich gas; in addition, the temperature of the flue gas tail gas discharged by the preheating vaporization module 10 is low, and the flue gas tail gas does not contain carbon monoxide and hydrogen, thereby being beneficial to environmental protection.
As a preferred embodiment, the preheat vaporization module 10 includes a PTC heater 101 and a vaporizer 102;
an input port of the PTC heater 101 is connected with an output port of the methanol-water supply module 1, and an output port of the PTC heater 101 is connected with a fuel input port of the vaporizer 102 for vaporizing the methanol water supplied from the methanol-water supply module 1 into methanol water vapor satisfying a reaction temperature of an endothermic reforming reaction of the reforming module 2 when an operation temperature of the reforming module 2 is not within a preset reaction temperature allowable range, so that the methanol water vapor is output to the reforming module 2 through the vaporizer 102; stopping vaporization when the working temperature is within the allowable range of the preset reaction temperature;
the fuel output port of the vaporizer 102 is connected with the fuel input port of the reforming module 2, and the tail gas input port of the vaporizer 102 is connected with the tail gas output port of the reforming module 2, so that when the working temperature is within the allowable range of the preset reaction temperature, the methanol water is vaporized into the methanol water vapor meeting the reaction temperature under the assistance of the flue gas tail gas of the fourth temperature; and the flue gas tail gas at the fourth temperature is changed into the flue gas tail gas at the fifth temperature and then is discharged through a tail gas outlet of the flue gas tail gas boiler.
Specifically, taking the reforming module 2 as a methanol reformer as an example, when the SOFC power generation system is started, the working temperature of the SOFC power generation system is not within a preset reaction temperature allowable range (the preset reaction temperature allowable range is determined according to the reaction temperature of the endothermic reforming reaction of the methanol reformer), the PTC heater 101 can realize vaporization, so that methanol vapor meeting the reaction temperature can be obtained in a short time, the starting time of the SOFC power generation system is shortened, and when the working temperature is within the preset reaction temperature allowable range, the SOFC power generation system is started, the completion of the SOFC power generation system is indicated, and the PTC heater 101 stops the vaporization and is only used for the circulation of methanol water.
The vaporizer 102 is used for circulating only the methanol vapor output from the PTC heater 101 to the methanol reformer when the SOFC power generation system is started; when the SOFC power generation system is started, vaporization is realized, so that the reliable occurrence of endothermic reforming reaction is ensured, and the normal operation of power generation is further ensured.
As a preferred embodiment, the SOFC power generation system further comprises a first controllable switch module 111 and a second controllable switch module 112;
the first port of the first controllable switch module 111 is connected with the hydrogen output port of the reforming module 2, and the second port of the first controllable switch module 111 is connected with the hydrogen input port of the hydrogen heating module 3 and is used for being turned off when the working temperature is not within the allowable range of the preset reaction temperature, and being turned on and off according to the preset combustion-power generation control strategy when the working temperature is within the allowable range of the preset reaction temperature;
the first port of the second controllable switch module 112 is connected with the hydrogen output port of the reforming module 2, and the second port of the second controllable switch module 112 is connected with the hydrogen input port of the fuel module, and is used for conducting when the working temperature is not within the allowable range of the preset reaction temperature, and conducting and switching off according to the preset combustion-power generation control strategy when the working temperature is within the allowable range of the preset reaction temperature.
Specifically, as shown in fig. 2, one path of the reforming module 2, the hydrogen heater and the SOFC stack module 6 is a power generation channel 113, one path of the reforming module 2-SOFC stack module 6 is a fuel channel 114, and the arrangement of the first controllable switch module 111 and the second controllable switch module 112 can ensure that the SOFC power generation system can be freely switched and distributed between two paths of combustion and power generation, so that different starting, power generation and standby working conditions can be better adapted; more specifically, the control ends of the first controllable switch module 111 and the second controllable switch module 112 may be connected to the control module, so as to realize switching between power generation and combustion under the control instruction given by the control module according to the preset combustion power generation control strategy, and the degree of automation is high.
It is understood that the first controllable switch module 111 may be a solenoid valve for power generation as shown in fig. 2, and the second controllable switch module 112 may be a solenoid valve for combustion as shown in fig. 2.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
It should also be noted that in this specification, relational terms such as first, second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily implying any actual such relationship or order between such entities or actions.
Claims (10)
1. The SOFC power generation system is characterized by comprising a methanol water supply module (1), a reforming module (2), a hydrogen heating module (3), an air supply module (4), a combustion module (5) and an SOFC stack module (6);
the methanol water supply module (1) is connected with the reforming module (2), the reforming module (2) is also connected with the combustion module (5) and the hydrogen heating module (3) respectively, the air supply module (4) is connected with the hydrogen heating module (3), the combustion module (5) and the SOFC pile module (6) respectively, and the SOFC pile module (6) is also connected with the hydrogen heating module (3) and the combustion module (5);
the reforming module (2) is used for carrying out endothermic reforming reaction according to the methanol water provided by the methanol water supply module (1) under the heat assistance of the flue gas tail gas at the third temperature so as to generate first hydrogen-rich gas;
the combustion module (5) is used for burning according to the input first hydrogen-rich gas, anode tail gas and cathode tail gas output by the SOFC stack module (6) so as to obtain combustion tail gas at a first temperature;
the air supply module (4) is used for heating the input air by utilizing the combustion tail gas with the first temperature to obtain hot air, outputting the hot air to a cathode air inlet of the SOFC stack module (6), and outputting the combustion tail gas with the first temperature to the hydrogen heating module (3) after changing the combustion tail gas with the first temperature into the combustion tail gas with the second temperature, wherein the second temperature is smaller than the first temperature;
the hydrogen heating module (3) is configured to heat the first hydrogen-rich gas by using the combustion tail gas with the second temperature to obtain a second hydrogen-rich gas, output the second hydrogen-rich gas to an anode air inlet of the SOFC stack module (6), and output the second hydrogen-rich gas to the reforming module (2) after changing the combustion tail gas with the second temperature into the flue gas with the third temperature, where the third temperature is less than the second temperature;
the SOFC stack module (6) is used for generating direct current according to the reaction of the hot air and the second hydrogen-rich gas, and outputting the anode tail gas and the cathode tail gas generated by the reaction to the combustion module (5).
2. SOFC power generation system reformed by methanol-water combustion according to claim 1, further comprising a temperature regulating module (7);
one port of the temperature adjusting module (7) is connected with a tail gas output port of the combustion module (5), and the other port of the temperature adjusting module (7) is connected with a tail gas input port of the air supply module (4) and is used for adding air into the combustion tail gas at the first temperature to cool when the first temperature is greater than a preset temperature allowable threshold.
3. The SOFC power generation system of methanol-water combustion reforming of claim 2, wherein the attemperation module (7) includes an attemperation blower (71) and attemperation cavity (72);
the air inlet of the temperature regulating fan (71) is used for entering air, and the air outlet of the temperature regulating fan (71) is connected with the air inlet of the temperature regulating cavity (72);
the tail gas input port of the temperature adjusting cavity (72) is connected with the tail gas output port of the combustion module (5), and the tail gas output port of the temperature adjusting cavity (72) is connected with the tail gas input port of the air supply module (4).
4. The SOFC power generation system of methanol-water combustion reforming of claim 1, further comprising an oxygen monitoring module (8) disposed at an exhaust outlet of the combustion module (5) and coupled to a control module for monitoring the oxygen content of the first temperature combustion exhaust and sending the oxygen content to the control module.
5. The SOFC power generation system of methanol-water combustion reforming of claim 4, wherein the air supply module (4) includes an air supply fan (41) and an air preheater (42);
the air inlet of the air supply fan (41) is used for entering air, the air outlet of the air supply fan (41) is connected with the air inlet of the air preheater (42), the control port of the air supply fan (41) is connected with the control module and used for regulating and controlling the air quantity fed in by the air supply fan according to a control signal issued by the control module, and the control signal is determined according to the monitored oxygen content;
the hot air output port of the air preheater (42) is connected with the cathode air inlet of the SOFC stack module (6), the tail gas input port of the air preheater (42) is connected with the tail gas output port of the combustion module (5), and the tail gas output port of the air preheater (42) is connected with the tail gas input port of the hydrogen heating module (3).
6. The methanol-water combustion reforming SOFC power generation system of claim 1, further comprising an electrical energy conversion module (91);
the input end of the electric energy conversion module (91) is connected with the electric energy output end of the SOFC electric energy module, and the output end of the electric energy conversion module (91) is connected with the load (92) and is used for carrying out electric energy conversion on the direct current according to the electricity consumption requirement of the load (92).
7. The SOFC power generation system of methanol-water combustion reforming of claim 1, wherein the methanol-water supply module (1) includes a methanol water tank (11) and a methanol water pump (12);
the output port of the methanol water tank (11) is connected with the input port of the methanol water pump (12), and the output port of the methanol water pump (12) is connected with the fuel input port of the reforming module (2).
8. The methanol-water combustion reforming SOFC power generation system of any one of claims 1 to 7, further comprising a preheat vaporization module (10);
the preheating vaporization module (10) is respectively connected with the methanol water supply module (1) and the reforming module (2), and is used for vaporizing the methanol water provided by the methanol water supply module (1) into methanol water vapor meeting the reaction temperature of the endothermic reforming reaction of the reforming module (2), and converting the flue gas tail gas at the fourth temperature input by the reforming module (2) into the flue gas tail gas at the fifth temperature, and then discharging the flue gas tail gas at the fifth temperature, wherein the fifth temperature is smaller than the fourth temperature;
the reforming module (2) is used for carrying out an endothermic reforming reaction according to the methanol water vapor with the assistance of the flue gas tail gas at the third temperature to generate first hydrogen-rich gas, and outputting the flue gas tail gas at the third temperature to the preheating vaporization module (10) after changing the flue gas tail gas at the third temperature into the flue gas tail gas at the fourth temperature.
9. The methanol-water combustion reforming SOFC power generation system of claim 8, wherein the preheat vaporization module (10) includes a PTC heater (101) and a vaporizer (102);
an input port of the PTC heater (101) is connected with an output port of the methanol water supply module (1), an output port of the PTC heater (101) is connected with a fuel input port of the vaporizer (102), and the PTC heater is used for vaporizing the methanol water provided by the methanol water supply module (1) into methanol water vapor meeting the reaction temperature of the endothermic reforming reaction of the reforming module (2) when the working temperature of the reforming module (2) is not within a preset reaction temperature allowable range, so that the methanol water vapor is output to the reforming module (2) through the vaporizer (102); stopping vaporization when the working temperature is within the allowable range of the preset reaction temperature;
the fuel output port of the vaporizer (102) is connected with the fuel input port of the reforming module (2), and the tail gas input port of the vaporizer (102) is connected with the tail gas output port of the reforming module (2) and is used for vaporizing the methanol water into methanol water vapor meeting the reaction temperature with the assistance of the flue gas tail gas at the fourth temperature when the working temperature is within the allowable range of the preset reaction temperature; and the flue gas tail gas at the fourth temperature is changed into the flue gas tail gas at the fifth temperature and then is discharged through a tail gas outlet of the flue gas tail gas boiler.
10. The methanol-water combustion reforming SOFC power generation system of claim 9, further comprising a first controllable switch module (111) and a second controllable switch module (112);
the first port of the first controllable switch module (111) is connected with the hydrogen output port of the reforming module (2), and the second port of the first controllable switch module (111) is connected with the hydrogen input port of the hydrogen heating module (3) and is used for being turned off when the working temperature is not within the preset reaction temperature allowable range and being turned on and off according to a preset combustion-power generation control strategy when the working temperature is within the preset reaction temperature allowable range;
the first port of the second controllable switch module (112) is connected with the hydrogen output port of the reforming module (2), and the second port of the second controllable switch module (112) is connected with the hydrogen input port of the fuel module and is used for conducting when the working temperature is not within the preset reaction temperature allowable range and conducting and switching off according to the preset combustion-power generation control strategy when the working temperature is within the preset reaction temperature allowable range.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311727276.5A CN117832556A (en) | 2023-12-15 | 2023-12-15 | SOFC power generation system for methanol-water combustion reforming |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311727276.5A CN117832556A (en) | 2023-12-15 | 2023-12-15 | SOFC power generation system for methanol-water combustion reforming |
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| CN202311727276.5A Pending CN117832556A (en) | 2023-12-15 | 2023-12-15 | SOFC power generation system for methanol-water combustion reforming |
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