CN216850006U - SOFC power generation device with efficient energy coupling - Google Patents
SOFC power generation device with efficient energy coupling Download PDFInfo
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- CN216850006U CN216850006U CN202220120819.1U CN202220120819U CN216850006U CN 216850006 U CN216850006 U CN 216850006U CN 202220120819 U CN202220120819 U CN 202220120819U CN 216850006 U CN216850006 U CN 216850006U
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Abstract
The utility model discloses a SOFC power generation facility of high-efficient energy coupling, including heat exchange part, fuel cell part and the waste heat recovery part that is connected, the reformed gas that the heat exchange part produced is used for fuel cell fuel gas as fuel gas, and the produced high temperature tail gas returns the remaining fuel gas of heat exchange part catalytic combustion after the electricity generation, and the heat of release provides the heat for fuel gas reforming reaction, and preheats fresh air; after the hot air in the heat exchange part is used as oxidizing gas to generate electricity in the fuel cell, the residual high-temperature air returns to the heat exchange part to perform catalytic combustion reaction with the residual fuel gas, and the tail gas enters the waste heat recovery part after catalytic combustion, so that the heat of the tail gas is further absorbed by cold water. The utility model has novel design, can ensure reliable and stable operation when the solid oxide fuel cell operates at high temperature, and realizes self-heating start and safe shutdown; the high-efficiency and stable operation and safe and reliable repeated starting of the solid oxide fuel cell are realized.
Description
Technical Field
The utility model relates to a fuel cell power generation technical field especially relates to a SOFC power generation facility of high-efficient energy coupling.
Background
The Solid Oxide Fuel Cell (SOFC) is a power generation device which adopts solid oxide as an electrolyte membrane and converts chemical energy of fuel into electric energy efficiently and cleanly through electrochemical reaction, the power generation efficiency of the SOFC can reach more than 50 percent, the cogeneration efficiency can reach more than 80 percent, and the SOFC is a novel power generation device for reducing carbon dioxide emission. The solid oxide fuel cell can not only use hydrogen fuel, but also use carbon-containing compounds such as natural gas, liquefied petroleum gas, fuel oil, biomass gas and the like which are abundant in resources and cheap as fuels.
The carbon-containing compound such as natural gas is directly used as the fuel of the solid oxide fuel cell, and the utilization efficiency of the fuel can be greatly improved. However, when carbon-containing compounds such as natural gas are directly introduced into the solid oxide fuel cell, carbon deposition of the anode is easily caused, the performance of the electrocatalyst is reduced, gas mass transfer in the electrode is affected, and the service life of the cell is reduced. Therefore, in a solid oxide fuel cell power generation system, a carbon compound-containing fuel such as natural gas is generally subjected to catalytic reforming and then enters a fuel cell power generation system to undergo an electrochemical reaction. When the SOFC works, a part of heat is generated because the voltage efficiency and the current efficiency are not 100%, and the heat generated by stacking the electricity of the cell needs to be removed in time so as to prevent the local temperature from being overhigh. The solid oxide fuel cell generally has a fuel utilization rate of 60-90%, 10-40% of the fuel gas as a tail gas cannot be fully utilized by the fuel cell, and if the fuel gas is directly discharged, a large amount of waste is caused, and the efficiency of the cell power generation system is greatly reduced.
In addition, the catalytic reforming process of carbon-containing compound fuel such as natural gas adopted by the solid oxide fuel cell is a strong endothermic reaction carried out at high temperature (600-: CH (CH)4+H2O→3H2+CO，ΔH1073k=225.7kJ mol-1The reaction is carried out with a large supply of heat. It is therefore important to couple the exothermic and endothermic reactions well in the solid oxide fuel cell portion to improve the overall energy utilization efficiency of the system.
In a solid oxide fuel cell power generation system, the overall design of the system needs to solve the following problems: (1) the system is safe and reliable and can be started repeatedly and run stably; (2) the reforming reaction is placed in a high temperature hot zone to reach the reforming reaction proceeding temperature; (3) the reforming reaction absorbs the heat generated by the combustion of the tail gas, reduces the temperature of the tail gas and realizes the heat integration of the system; (4) the fuel tail gas flowing out of the battery needs to be completely converted so as to realize the efficient utilization of waste heat.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model discloses a SOFC power generation facility of high-efficient energy coupling, the device easily assembles, can improve solid oxide fuel cell's energy utilization efficiency greatly, realizes solid oxide fuel cell's high efficiency, steady operation and safe and reliable repeated start.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the high-efficiency energy-coupled SOFC power generation device is characterized by comprising a heat exchange part, a fuel cell part and a waste heat recovery part which are connected, wherein,
the heat exchange part is arranged in the shell, the left side of the upper part of the shell is a fuel cavity, and the right side of the upper part of the shell is an air inlet cavity; a tail gas combustion cavity is arranged right below the fuel cavity, a cathode tail gas cavity is arranged right below the tail gas combustion cavity, a reforming gas cavity is arranged right below the cathode tail gas cavity, and a plurality of fuel reforming pipes are arranged in the tail gas combustion cavity and the cathode tail gas cavity at intervals; an air heat exchange cavity is arranged right below the air inlet air cavity, an anode tail air cavity is arranged right below the air heat exchange cavity, an air outlet air cavity is arranged right below the anode tail air cavity, and a plurality of air heat exchange tubes are arranged in the air heat exchange cavity and the anode tail air cavity at intervals;
the fuel cell part is internally provided with a fuel cell power generation module;
the waste heat recovery part is used for absorbing redundant heat carried in combustion tail gas discharged by the heat exchange part and is provided with a tail gas inlet, a tail gas outlet, a cold water inlet and a hot water outlet.
The technical proposal of the utility model also comprises that the tail gas combustion cavity is separated from the cathode tail gas cavity by a baffle, and the cathode tail gas cavity is separated from the reforming gas cavity by a baffle; the air heat exchange cavity is separated from the anode tail air cavity through a first baffle, the anode tail air cavity is separated from the air outlet cavity through a second baffle, and a plurality of cathode tail gas guide pipes are fixedly arranged on the second baffle.
The technical scheme of the utility model also includes that a reforming fuel air inlet is arranged above the fuel cavity, a first air inlet is arranged above the air inlet cavity, a reforming gas outlet is arranged below the reforming gas cavity, an air outlet is arranged below the air outlet cavity, an anode tail gas inlet is arranged at one side of the anode tail gas cavity, and a cathode tail gas inlet is arranged at the other side of the anode tail gas cavity; and a combustion tail gas outlet is formed in one side of the tail gas combustion cavity.
The technical proposal of the utility model also comprises that a second fuel gas inlet and a second air inlet are arranged above the fuel cell part; an anode tail gas outlet and a cathode tail gas outlet are also arranged below the fuel cell part, the second fuel gas inlet is connected with the reformed gas outlet in the heat exchange part through a pipeline, and the second air inlet is connected with the air outlet in the heat exchange part through a pipeline.
The technical scheme of the utility model still include, separate through first baffle between fuel chamber and the air chamber that admits air, separate through the second baffle between reforming gas chamber and the air chamber of giving vent to anger.
The technical proposal of the utility model also comprises that the anode tail gas outlet is connected with an anode tail gas inlet in the heat exchange part through a pipeline; the cathode tail gas outlet is connected with a cathode tail gas inlet in the heat exchange part; and the combustion tail gas outlet is connected with the gas inlet in the waste heat recovery part through a pipeline.
The technical scheme of the utility model still include, the burning tail gas outlet in tail gas import and the heat exchange part is connected through the pipeline.
The technical scheme of the utility model still include, fuel cell power generation module is plate, cast, flat cast.
The beneficial effects of the utility model are that, compare with prior art, this SOFC power generation facility of high-efficient energy coupling's advantage lies in:
(1) the device can ensure the reliable and stable operation of the solid oxide fuel cell when the solid oxide fuel cell operates at high temperature, and can realize the self-heating start and the safe shutdown of the fuel cell.
(2) The device can greatly improve the energy utilization efficiency of the solid oxide fuel cell, and realize the high-efficiency and stable operation and safe and reliable repeated start of the solid oxide fuel cell.
(3) The device realizes the heat absorption and release coupling of the fuel gas catalytic reforming reaction and the tail gas catalytic combustion reaction; the tail gas is cooled, the temperature of the catalytic combustion cavity is prevented from being too high, and the system control is facilitated; the reasonable heat flow characteristic of the system is convenient for the intelligent management of the power station, and the reliability of the whole system is improved.
Drawings
FIG. 1 is a schematic view of the structure principle of the present invention;
FIG. 2 is a schematic view of the heat exchange part of the present invention;
FIG. 3 is a schematic diagram of a fuel cell according to the present invention;
FIG. 4 is a schematic structural view of a waste heat recovery part of the present invention;
wherein: 1. a heat exchange portion; 1-1, a first air inlet; 1-2, a reformed fuel inlet; 1-3, a fuel cavity; 1-4, a fuel reforming tube; 1-5, a tail gas combustion cavity; 1-6, anode tail gas inlet; 1-7, cathode tail gas cavity; 1-8, reforming gas cavity; 1-9, a reformed gas outlet; 1-10, air outlet; 1-11, an air outlet cavity; 1-12, cathode tail gas inlet; 1-13, anode tail gas cavity; 1-14, a cathode tail gas conduit; 1-15, a combustion tail gas outlet; 1-16, air heat exchange tube; 1-17, an intake air cavity; 2. a fuel cell section; 2-1, a second fuel gas inlet; 2-2, an anode tail gas outlet; 2-3, cathode tail gas outlet; 2-4, a second air inlet; 3. a waste heat recovery part; 3-1, tail gas inlet; 3-2, a hot water outlet; 3-3, a tail gas outlet; 3-4, cold water inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The thermo-thermal coupling of reactions in solid oxide fuel cell power generation systems is an important component in establishing stable, easily controlled, highly integrated system architectures. The characteristics and the requirement to solid oxide fuel cell power generation system to and the reforming reaction of carbon-containing compound fuel such as natural gas and the requirement of tail gas catalytic combustion reaction, the utility model discloses a high-efficient energy coupling's SOFC power generation facility, this power generation system include heat exchange process, fuel cell power generation process and waste heat recovery process.
The specific process is as follows:
the heat exchange process is carried out in the heat exchange part 1, fuel gas enters the fuel cavities 1-3 through the reforming fuel gas inlets 1-2 and is redistributed to the fuel reforming tubes 1-4, the fuel gas carries out reforming reaction in the fuel reforming tubes 1-4, reformed gas obtained after reforming firstly enters the reforming gas cavities 1-8 and is discharged through the reforming gas outlets 1-9; air enters the air inlet air cavity 1-17 through the first air inlet 1-1 and is redistributed into each air heat exchange tube 1-16 for preheating, and the preheated air enters the air outlet air cavity 1-11 and is discharged through the air outlet 1-10 at the lower part.
The electricity generation process of the fuel cell is carried out in the fuel cell section 2, and the reformed gas from the heat exchange section 1 is introduced into the fuel cell section 2 through the second fuel gas inlet 2-1 to be used as the fuel gas for the fuel cell section 2; the preheated air from the heat exchange portion 1 enters the fuel cell portion 2 through the second air inlet 2-4 as the oxidizing gas of the fuel cell portion 2; in addition, anode off-gas discharged from an anode off-gas outlet 2-2 of the fuel cell section 2 enters the heat exchange section 1 through an anode off-gas inlet 1-6, and cathode off-gas discharged from a cathode off-gas outlet 2-3 of the fuel cell section 2 enters the heat exchange section 1 through a cathode off-gas inlet 1-12.
The waste heat recovery process is carried out in the waste heat recovery part 3, combustion tail gas discharged from the heat exchange part 1 enters through a tail gas inlet 3-1, cold water enters through a cold water inlet 3-4 and is used for absorbing heat in the tail gas, the tail gas after temperature reduction is discharged out of the system through a tail gas outlet 3-3, and water after temperature rise is discharged out of the system through a hot water outlet 3-2.
The reformed gas generated in the heat exchange process is used as fuel gas, high-temperature tail gas generated after the fuel cell generates electricity is returned to the heat exchange part 1, and the residual fuel gas is catalytically combusted in the heat exchange part 1, so that heat is released to provide heat for the fuel gas reforming reaction process, and fresh air is preheated; after the hot air in the heat exchange process is used as oxidizing gas to generate electricity in the fuel cell, the residual high-temperature air returns to the heat exchange part 1 to perform catalytic combustion reaction with the residual fuel gas, the tail gas enters the waste heat recovery part 3 after catalytic combustion, and the heat of the tail gas is further absorbed by cold water, so that the full utilization of the waste heat is realized.
In particular, the heat exchange part 1 is arranged in a shell, the left side of the upper part of the shell is a fuel cavity 1-3, and the right side of the upper part of the shell is an air inlet cavity 1-17; wherein:
a tail gas combustion cavity 1-5 is arranged right below the fuel cavity 1-3, a cathode tail gas cavity 1-7 is arranged right below the tail gas combustion cavity 1-5, a reformed gas cavity 1-8 is arranged right below the cathode tail gas cavity 1-7, the tail gas combustion cavity 1-5 and the cathode tail gas cavity 1-7 are separated by a baffle, the cathode tail gas cavity 1-7 and the reformed gas cavity 1-8 are also separated by a baffle, and a plurality of fuel reforming pipes 1-4 are arranged in the tail gas combustion cavity 1-5 and the cathode tail gas cavity 1-7 at intervals;
an air heat exchange cavity is arranged right below the air inlet air cavity 1-17, an anode tail air cavity 1-13 is arranged right below the air heat exchange cavity, an air outlet air cavity 1-11 is arranged right below the anode tail air cavity 1-13, the air heat exchange cavity and the anode tail air cavity 1-13 are separated by a first baffle, the anode tail air cavity 1-13 and the air outlet air cavity 1-11 are separated by a second baffle, a plurality of cathode tail gas guide pipes 1-14 are fixedly arranged on the second baffle, and a plurality of air heat exchange pipes 1-16 are arranged in the air heat exchange cavity and the anode tail air cavity 1-13 at intervals.
Further, the fuel cell power generation module is installed in the fuel cell part 2, and a second fuel gas inlet 2-1 and a second air inlet 2-4 are arranged above the fuel cell part; an anode tail gas outlet 2-2 and a cathode tail gas outlet 2-3 are also arranged below the fuel cell power generation module.
In particular, the fuel cell power generation module is a flat plate type, a tube type or a flat tube type, and has a wide application range.
Particularly, a shell of the waste heat recovery part 3 is provided with a tail gas inlet 3-1, a tail gas outlet 3-3, a cold water inlet 3-4 and a hot water outlet 3-2, and the tail gas inlet 3-1 is connected with a combustion tail gas outlet 1-15 in the heat exchange part 1 through a pipeline.
Particularly, a reformed fuel air inlet 1-2 is arranged above the fuel cavity 1-3, a first air inlet 1-1 is arranged above the air inlet cavity 1-17, a reformed gas outlet 1-9 is arranged below the reformed air cavity 1-8, an air outlet 1-10 is arranged below the air outlet cavity 1-11, an anode tail gas inlet 1-6 is arranged at one side of the anode tail air cavity 1-13, and a cathode tail gas inlet 1-12 is arranged at one side of the anode tail air cavity 1-13; and one side of the tail gas combustion cavity 1-5 is provided with a tail gas combustion outlet 1-15.
In particular, the fuel chamber 1-3 is separated from the inlet air chamber 1-17 by a first partition, and the reforming air chamber 1-8 is separated from the outlet air chamber 1-11 by a second partition.
Specifically, the anode off-gas outlet 2-2 is connected to the anode off-gas inlet 1-6 of the heat exchange section 1 through a pipeline; the cathode tail gas outlet 2-3 is connected with a cathode tail gas inlet 1-12 in the heat exchange part 1; the second fuel gas inlet 2-1 is connected with a reformed gas outlet 1-9 in the heat exchange part 1 through a pipeline; the second air inlet 2-4 is connected with the air outlet 1-10 in the heat exchange portion 1 through a pipeline; the combustion tail gas outlets 1-15 are connected with the gas inlet in the waste heat recovery part 3 through pipelines.
In particular, the fuel reforming tubes 1 to 4 contain a fuel reforming catalyst for catalytically reforming a carbon-containing compound fuel such as natural gas, and the fuel reforming catalyst may be in the form of a spherical catalyst or a foam catalyst; the active components of the catalyst comprise platinum group metals of a main catalyst, VIII group elements of the 4 th period and various catalyst promoter components; their support may be selected from any suitable surface impregnation method for supporting onto the wall layer support, such as co-impregnation or step impregnation. The catalyst outer layer carrier can be theta-Al2O3、δ-Al2O3、γ-Al2O3Etc., and may also be a cerium-containing rare earth composite oxide such as CeO2，CeZrO2，LaCeZrO2And the like. In preparing the catalyst, any decomposable platinum group compound and compound of group VIII element of period 4 such as halide, nitrate, oxide and the like, for example, rhodium trichloride, palladium dichloride, chloroplatinic acid, iron nitrate, nickel nitrate, cobalt nitrate and the like, may be used. Platinum group component, group VIII element component of period 4, and alkali metal and alkaline earth metal promoters of lithium, sodium, potassium, calciumThe strontium, barium, etc. components may be combined with the carrier in any order. The catalyst can be used for reforming carbon-containing compound fuels such as methane, liquefied gas, methanol and the like, an optimal fuel reforming catalyst can be selected according to different carbon-containing compound fuels adopted by the solid oxide fuel cell, and the obtained reformed gas mainly comprises hydrogen and carbon monoxide and can be directly used as the fuel of the solid oxide fuel cell.
The tail gas combustion chambers 1-5 are filled with tail gas combustion catalysts which are selected from spherical catalysts or foam catalysts and have different shapes, and the active components of the catalysts comprise platinum group metals of main catalysts. The catalyst outer layer carrier can be theta-Al2O3、δ-Al2O3、γ-Al2O3Etc., and may also be a rare earth composite oxide containing cerium such as CeO2，CeZrO2，LaCeZrO2And the like. The support during catalyst preparation may be selected from any suitable surface impregnation method for supporting onto the wall layer support, such as co-impregnation or step impregnation. The catalyst can be used for catalytic combustion of the anode tail gas of the fuel cell, so that the fuel in the anode tail gas is completely combusted, and heat is released.
The utility model discloses in, hydrocarbon fuel gas such as natural gas passes through 1-2 entering fuel chamber 1-3 of reforming fuel air inlet, each fuel reforming pipe 1-4 is redistributed, fuel gas takes place reforming reaction in fuel reforming pipe 1-4, the reformed gas that obtains after the reforming is as the fuel gas of fuel cell part 2, high temperature tail gas after the fuel cell electricity generation returns heat exchange part 1, catalytic combustion surplus fuel gas in heat exchange part 1, the release heat provides the heat for fuel gas reforming, and preheat the air.
Air enters an air inlet air cavity 1-17 of the heat exchange part 1 through a first air inlet 1-1 and is redistributed to air heat exchange tubes 1-16 to preheat air, the preheated air is sent to the fuel cell part 2 to be used as oxidizing gas, and residual high-temperature air after power generation of the fuel cell returns to the heat exchange part 1 to perform catalytic combustion reaction with residual fuel gas in the heat exchange part 1.
The tail gas after heat exchange enters a waste heat recovery system, and the waste heat recovery system absorbs heat of the tail gas through cold water to realize waste heat recovery.
The high-efficiency energy-coupled SOFC power generation device further comprises:
1. the self-heating starting of the fuel cell part 2 is realized, at low temperature, fuel and air pass through the heat exchange part 1 and the fuel cell part 2, the fuel does not generate electricity on the fuel cell due to low temperature and all enter the tail gas combustion cavities 1-5 of the heat exchange part 1, the fuel and the air are catalyzed and combusted in the tail gas combustion cavities 1-5 to release heat, the air and the fuel gas are preheated, the preheated air and the fuel gas enter the fuel cell part 2, the temperature of the fuel cell part 2 is uniformly and stably raised until the normal operation of the fuel cell is stable, and the self-heating starting of the fuel cell part 2 is realized.
2. The reliable and stable operation of the solid oxide fuel cell is realized, when the fuel cell part 2 is in discharge operation, the carbon-containing compound fuel is reformed into the synthesis gas in the fuel reforming tubes 1-4 of the heat exchange part 1, and enters the fuel cell part 2 after being preheated together with fresh air, so that the large temperature fluctuation on the fuel cell part 2 is avoided, the risk of carbon deposition is greatly reduced, and the reliable and stable operation of the fuel cell part 2 can be realized.
3. A stable safe shutdown of the fuel cell section 2 can be achieved. When the fuel cell part 2 needs to be stopped, the fuel cell part 2 can be stably and reliably stopped under the protection of the fuel gas by reducing the supply amount of the fuel and increasing the amount of fresh air.
4. The waste heat recovery part 3 absorbs the heat of the tail gas through cold water, and can also realize the recovery and utilization of the waste heat of the tail gas.
In conclusion, the high-efficiency energy-coupled SOFC power generation device can realize the heat coupling of the preheating of fuel gas and air, the combustion of tail gas and reforming reaction. On the one hand, the temperature of each part of the power generation system is stabilized, and the system is protected. On the other hand, the power generation efficiency of the system is improved. In the third aspect, the heat released by the combustion reaction of the tail gas is absorbed by the reforming reaction of the fuel, so that higher power generation efficiency of the system can be realized.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (8)
1. The high-efficiency energy-coupled SOFC power generation device is characterized by comprising a heat exchange part, a fuel cell part and a waste heat recovery part which are connected, wherein,
the heat exchange part is arranged in the shell, the left side of the upper part of the shell is a fuel cavity, and the right side of the upper part of the shell is an air inlet cavity; a tail gas combustion cavity is arranged right below the fuel cavity, a cathode tail gas cavity is arranged right below the tail gas combustion cavity, a reforming gas cavity is arranged right below the cathode tail gas cavity, and a plurality of fuel reforming pipes are arranged in the tail gas combustion cavity and the cathode tail gas cavity at intervals; an air heat exchange cavity is arranged right below the air inlet air cavity, an anode tail air cavity is arranged right below the air heat exchange cavity, an air outlet air cavity is arranged right below the anode tail air cavity, and a plurality of air heat exchange tubes are arranged in the air heat exchange cavity and the anode tail air cavity at intervals;
the fuel cell part is internally provided with a fuel cell power generation module;
the waste heat recovery part is used for absorbing redundant heat carried in combustion tail gas discharged by the heat exchange part and is provided with a tail gas inlet, a tail gas outlet, a cold water inlet and a hot water outlet.
2. The SOFC power device with high efficiency and energy coupling of claim 1, wherein the tail gas combustion chamber is separated from the cathode tail gas chamber by a baffle, and the cathode tail gas chamber is separated from the reforming gas chamber by a baffle; the air heat exchange cavity and the anode tail air cavity are separated by a first baffle, the anode tail air cavity and the air outlet cavity are separated by a second baffle, and the second baffle is further fixedly provided with a plurality of cathode tail gas guide pipes.
3. The high-efficiency energy-coupled SOFC power generation device of claim 2, wherein a reformed fuel air inlet is arranged above the fuel cavity, a first air inlet is arranged above the air inlet cavity, a reformed gas outlet is arranged below the reformed air cavity, an air outlet is arranged below the air outlet cavity, an anode tail gas inlet is arranged at one side of the anode tail gas cavity, and a cathode tail gas inlet is arranged at the other side of the anode tail gas cavity; and a combustion tail gas outlet is formed in one side of the tail gas combustion cavity.
4. A high efficiency energy coupled SOFC power generating device as set forth in claim 3, wherein a second fuel gas inlet and a second air inlet are provided above the fuel cell portion; an anode tail gas outlet and a cathode tail gas outlet are also arranged below the fuel cell part, the second fuel gas inlet is connected with the reformed gas outlet in the heat exchange part through a pipeline, and the second air inlet is connected with the air outlet in the heat exchange part through a pipeline.
5. An SOFC power generating device with high efficiency energy coupling as claimed in claim 3, wherein the fuel cavity is separated from the inlet air cavity by a first separator and the reformed air cavity is separated from the outlet air cavity by a second separator.
6. An efficient energy coupled SOFC power device according to claim 4, wherein the anode tail gas outlet is connected to the anode tail gas inlet in the heat exchange section via a pipeline; the cathode tail gas outlet is connected with a cathode tail gas inlet in the heat exchange part; and the combustion tail gas outlet is connected with the gas inlet in the waste heat recovery part through a pipeline.
7. An SOFC power generating device with high efficiency and energy coupling as claimed in claim 1, wherein the tail gas inlet is connected to the combustion tail gas outlet of the heat exchange section via a pipeline.
8. The high efficiency energy coupled SOFC power device of claim 1, wherein the fuel cell power module is a flat plate, tube, or flat tube type.
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