CN1379494A - Electric generation system combining solid oxide fuel battery with turbogenerator - Google Patents
Electric generation system combining solid oxide fuel battery with turbogenerator Download PDFInfo
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- CN1379494A CN1379494A CN02111642A CN02111642A CN1379494A CN 1379494 A CN1379494 A CN 1379494A CN 02111642 A CN02111642 A CN 02111642A CN 02111642 A CN02111642 A CN 02111642A CN 1379494 A CN1379494 A CN 1379494A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/30—Hydrogen technology
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Abstract
A solid oxide fuel cell and steam turbine combined generating system uses a jointly circulated generating mode with solid oxide fuel cells and steam turbine, among which after the fuel gas is boosted by a fuel-gas fan, heated by a heat-exchanger, and desulfurized by a desulfurizer, it is sent to a steam boiler to be preheated, then to the fuel cell anode for electrochemical reaction, the electric energy generated is sent to the users via outdoor circuit. The exhaust from the anode is sent to the heat exchanger for fuel preheating and water supply, then to the steam boiler via carbon dioxide removal device to be burnt together with part of natural gas to heat water to generate high-temperature and high-pressure steam to push the steam turbine to rotating and drive the generator to generate electric energy.
Description
Technical field:
The present invention relates to a kind of electricity generation system, relating in particular to a kind of is the electric generation system combining solid oxide fuel battery with turbogenerator of fuel with the natural gas, belongs to the energy utilization technology field.
Background technology:
The notion source of fuel cell arises from the Britain physicist William Grove before 150 years, he produces the principle of hydrogen and oxygen with the reductive water electrolysis, design comes synthetic water and emits electric current by the electrochemical reaction of pole plate with hydrogen, oxygen, and this notion promptly is the research of fuel cell precursor.But real fuel cell is the space program that is that the U.S. lands on the moon by using.This technology by the use of success nearly 50 years, but,, but do not have commercialization all the time through long effort because the cost of fuel cell is too expensive.Afterwards, the research and development of fuel cell are subjected to the attention of national defense industry, and some American-European, Japanese electric power or natural gas companies also once actively drop into the fuel cell of the large-scale generating usefulness of research and development.These companies wish can reduce cost of electricity-generating in technological break-through, and improve environmental pollution problems.But these large-scale electric generator using fuel batteries almost do not have formal commercialization, and are still main because problem that cost is too high and whole system operation lifetime also are not so good as conventional power generation systems.Yet in the more than ten years in past, fuel cell has played revolutionary change technically, makes it go on business-like road for development gradually.Fuel cell technology is hopeful to enter electricity market with the form of concentrated and decentralized power s most.
Fuel cell is that the chemical energy with fuel is converted into electric energy, and is not subjected to the restriction of Carnot cycle.Wherein, Solid Oxide Fuel Cell (Solid Oxidant Carbonate Fuel Cell; SOFC) have efficient, low pollution, modularized design and do not melt advantage such as salt corrosion, greatly be subjected to people and pay close attention to.
The efficient of the thermal power generation of China has only 40% at present, and contaminated environment.Also there are problems such as resource transportation and war destruction in large-scale thermal power generation.Be accompanied by transfering natural gas from the west to the east, the utilization of natural gas will be multiplied, and natural gas will be mainly used in fields such as chemical industry, generating in China.For the unit of some special purposes, the electricity generation system of MW level can be widely used.It can satisfy the need for electricity of small business on the one hand, because decentralized power s distributes extensively, can reduce the impact that disasters such as earthquake, war cause society on the other hand.
Some fuel cell generations have been announced abroad, great majority adopt fuel cells and gas turbine to form combined cycle mode (the Wei He.Numerical analysis of molten carbonate fuelcell systems.International Journal of Energy Research that generates electricity, 1997,21:69-76.).One side is owing to gas turbine involves great expense, and developing country does not have the technology of this respect, the very difficult popularization; On the other hand, because this kind circulating generation mode requires system will reach certain pressure, so having relatively high expectations to fuel battery performance.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of electric generation system combining solid oxide fuel battery with turbogenerator is provided, further improve the feasibility of fuel cell combined cycle generation technology, reduce the technical difficulty of system.
For realizing such purpose, in the technical scheme of the present invention, it is fuel that combined generating system adopts natural gas, system is made of equipment such as Solid Oxide Fuel Cell, steam boiler, steam turbine, generator, heat exchangers, electric energy is by fuel cell and generator combined providing, system can also pass through a certain amount of hot water for the external world except that generating.
Electricity generation system of the present invention mainly is divided into Solid Oxide Fuel Cell and auxiliary generating system two parts, and fuel cell utilizes natural gas and air generation electrochemical reaction, produces electric energy, and auxiliary generating system utilizes steam boiler and steam turbine to produce electric energy.
Fuel adopts natural gas, the outer two ends of the heat exchanger tube of anode of fuel cell back connect fuel gas blower fan and gas sweetening unit respectively, the desulfurizer port of export connects the heating surface of steam boiler, another port of export of boiler heating surface connects the anode inlet of fuel cell, be used to produce the heat exchanger tube inner outlet that population end in the heat exchanger tube of hot water connects the anode of fuel cell back, the port of export connects decarbonizer, and the port of export of decarbonizer connects steam boiler, is used for boiler furnace fuel.A steam-heating pipe that connects burner hearth of steam turbine, condenser is linked in the other end, and the two ends of circulating water pump connect the steam-heating pipe in condenser and the steam boiler respectively, and generator is connected with steam turbine is coaxial.
The heat exchanger tube that one end of air blower connects fuel battery negative pole exhaust back enters the mouth outward, and the pipe outer vent end of this heat exchanger connects the heating surface in the steam boiler, and the port of export of heating surface connects the fuel battery negative pole arrival end.The interior inlet of pipe that two ends connect the fuel battery negative pole outlet respectively and are used to produce the heat exchanger of hot water in the heat exchanger tube of fuel battery negative pole outlet back, the port of export in the heat exchanger tube connects evacuated tube.
The course of work of system: after fuel gas pressurizes by the fuel gas blower fan, at first utilize heat exchanger heats, carry out desulfurization through desulfurizer, deliver to anode of fuel cell generation electrochemical reaction after delivering to the steam boiler preheating then, the electric energy that produces is given the user by external circuit, anode exhaust is through the over-heat-exchanger pre-heating fuel, effluent air feeds the heat exchanger heats feedwater in the heat exchanger tube, the exhaust of heat exchanger sends into steam boiler after through the carbon dioxide removal device and the part natural gas is together sent into the steam boiler burning, the heat of burning is used for heating the water generates high temperature and high pressure steam, the steam that boiler produces promotes the steam turbine running, drives generator and produces electric energy.
Secondly, air in certain amount is heated through the heat exchanger that blower fan is admitted to the cloudy back of fuel cell, the heating surface that arrives the steam boiler the inside then continues heating, air after the heating is delivered to fuel battery negative pole, at first through being lowered the temperature in the heat exchanger tube, the air after the cooling is discharged in the atmosphere after feeding water through heat exchanger heats cathode exhaust gas.
At last, the electric energy of fuel cell and generator generation is delivered to the user.
The present invention compared with prior art has tangible progress and beneficial effect.The present invention has adopted natural gas to the way that steam boiler is heated, and makes natural gas obtain higher temperature, satisfies the requirement of fuel cell generation electrochemical reaction.Residual fuel and a certain amount of natural gas that the fuel of steam boiler adopts fuel cell to discharge mix, and purpose is the caloric value for the assurance boiler combustion necessity that obtains.By auxiliary generating plant, further improve energy transformation efficiency, system can move under normal pressure.
Adopt the mode of Solid Oxide Fuel Cell and steam turbine combined cycle generation, improve energy utilization rate, reach the discharging that reduces greenhouse gas.Because present thermal power generation efficient is about 40%, and the generating efficiency of Solid Oxide Fuel Cell association circulating power generation system will reach about 50%, the raising of generating efficiency makes this kind generation mode can reduce the fuel use amount about 10%.
Description of drawings and embodiment:
For understanding technical scheme of the present invention better, be further described below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is a system configuration schematic diagram of the present invention.
As shown in the figure, it is fuel that combined generating system of the present invention adopts natural gas, orthogonal rheology parallel operation 1 connects two electrodes of fuel cell 2, the outer two ends of heat exchanger 4 pipes of fuel cell 2 anode back connect fuel gas blower fan 6 and gas sweetening unit 3 respectively, desulfurizer 3 ports of export connect the heating surface of steam boiler 10, another port of export of boiler heating surface connects the anode inlet of fuel cell 2, be used to produce the heat exchanger 4 pipe inner outlets that arrival end in heat exchanger 5 pipes of hot water connects the anode of fuel cell back, heat exchanger 5,9 the pipe outside is connected with heat supply water pump 15, heat exchanger 5 ports of export connect decarbonizer 16, the port of export of decarbonizer connects steam boiler 10, is used for boiler furnace fuel.One end of steam turbine 14 connects the steam-heating pipe of burner hearth, and the other end is linked condenser 13, and the two ends of circulating water pump 11 connect the steam-heating pipe in condenser 13 and the steam boiler 10, generator 12 and 14 coaxial connections of steam turbine respectively.
One end of air blower 7 connects the outer inlet of heat exchanger 8 pipes of fuel cell 2 cathode exhaust gas back, and the pipe outer vent end of this heat exchanger connects the heating surface in the steam boiler 10, and the port of export of heating surface connects fuel cell 2 cathode inlet ends.Two ends connect the interior inlet of pipe that fuel battery negative pole exported and be used to produce the heat exchanger 9 of hot water respectively in heat exchanger 8 pipes of fuel battery negative pole outlet back, and the pipe outer vent end of heat exchanger 9 connects evacuated tube.
The course of work of system: after fuel gas pressurizes by fuel gas blower fan 6, at first utilize heat exchanger 4 heating, carry out desulfurization through desulfurizer 3, deliver to fuel cell 2 anode generation electrochemical reactions after delivering to steam boiler 10 preheatings then, the electric energy that produces is given the user by external circuit, anode exhaust is through over-heat-exchanger 4 pre-heating fuels, effluent air feeds heat exchanger 5 heated feed waters in heat exchanger 4 pipes, after the exhaust process carbon dioxide removal device 16 of heat exchanger 5 and part natural gas mix, together send into steam boiler 10 burnings, the heat of burning is used for heating the water generates high temperature and high pressure steam, the steam that boiler produces promotes steam turbine 14 runnings, drives generator 12 and produces electric energy.The electric energy that fuel cell 2 produces is given the user together through the electric energy that orthogonal rheology parallel operation 1 converts alternating current and generator 12 generations to.
Secondly, air in certain amount is admitted to heating in the heat exchanger 8 of the cloudy back of fuel cell through blower fan 7, the heating surface that arrives steam boiler 10 the insides then continues heating, air after the heating is delivered to the negative electrode of fuel cell 2, at first through cooling in a heat exchanger 8 pipes, the air after the cooling is discharged in the atmosphere behind over-heat-exchanger 9 heated feed waters cathode exhaust gas.
At last, the electric energy of fuel cell and generator generation is delivered to the user,, thereby reach the purpose of efficiently utilizing natural gas power because generating efficiency is higher.
In one embodiment of the invention, be fuel with the natural gas, the whole generating system is carried out heat Balance Calculation.The inlet temperature of fuel cell anode and cathode gas is 950 degrees centigrade, and fuel and the air utilance in the middle of fuel cell is 60% and 50%, and system works pressure is normal pressure; The operating voltage of fuel cell is 1.07V, and the heat exchange efficiency of heat exchanger is 99%, and the efficient of orthogonal rheology parallel operation is 99%; Steam is to produce in steam boiler, drives generator for electricity generation by small-sized steam turbine, and its generating efficiency gets 25%; The natural gas in gas field, Weiyuan, Sichuan is a fuel, and its composition is methane 86.80%, ethane 0.01%, carbon dioxide 4.437%, hydrogen sulfide 0.31%, nitrogen 8.10%, helium 0.316%, argon 0.027%, and fuel flow rate is 482m
3/ h.Can obtain the generate output (fuel cell is 1500kW, and auxiliary generating system is 500kW) of 2000kW, the generating efficiency of Solid Oxide Fuel Cell association circulating power generation system is 49%, and this system thermal efficiency was 82% (containing heat supply).
Claims (1)
1, a kind of electric generation system combining solid oxide fuel battery with turbogenerator, the outer two ends of heat exchanger (4) pipe that it is characterized in that Solid Oxide Fuel Cell (2) anode back connect fuel gas blower fan (6) and gas sweetening unit (3) respectively, desulfurizer (3) port of export connects the heating surface of steam boiler (10), another port of export of boiler heating surface connects the anode inlet of fuel cell (2), arrival end in heat exchanger (5) pipe connects heat exchanger (4) the pipe inner outlet of anode of fuel cell back, heat exchanger (5) port of export connects steam boiler (10) through decarbonizer (16), one end of steam turbine (14) connects the steam-heating pipe of burner hearth, the other end is through condenser (13), circulating water pump (11) is linked steam boiler (10), generator (12) and coaxial connection of steam turbine (14), one end of air blower (7) connects the outer inlet of heat exchanger (8) pipe of fuel cell (2) cathode exhaust gas back, the pipe outer vent of heat exchanger (8) connects the heating surface in the steam boiler (10), the port of export of heating surface connects fuel cell (2) cathode inlet end, the interior inlet of pipe that two ends connect the fuel battery negative pole outlet respectively and are used to produce the heat exchanger (9) of hot water in heat exchanger (8) pipe, the pipe outer vent end of heat exchanger (9) connects evacuated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021116423A CN1151575C (en) | 2002-05-10 | 2002-05-10 | Electric generation system combining solid oxide fuel battery with turbogenerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021116423A CN1151575C (en) | 2002-05-10 | 2002-05-10 | Electric generation system combining solid oxide fuel battery with turbogenerator |
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| CN1379494A true CN1379494A (en) | 2002-11-13 |
| CN1151575C CN1151575C (en) | 2004-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021116423A Expired - Fee Related CN1151575C (en) | 2002-05-10 | 2002-05-10 | Electric generation system combining solid oxide fuel battery with turbogenerator |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913294B (en) * | 2005-08-11 | 2010-04-14 | 株式会社神户制钢所 | Electric power generating device |
| CN102569859A (en) * | 2012-01-11 | 2012-07-11 | 华北电力大学 | Integrated oxygen transmission membrane (OTM) pressurized carbon dioxide (CO2) zero-emission solid oxide fuel cell (SOFC)/gas transmission (GT)/air transmission (AT)/steam turbine (ST) composite power system |
| CN102628402A (en) * | 2012-04-17 | 2012-08-08 | 西安交通大学 | Fuel cell and organic Rankine cycle combined power generating system based on LNG (Liquefied Natural Gas) cold energy utilization |
| CN103206307A (en) * | 2013-04-03 | 2013-07-17 | 华北电力大学 | Hybrid power system using normal pressure MCFC (molten carbonate fuel cell) to recover CO2 in exhaust gas of gas turbine |
| CN104884873A (en) * | 2012-12-28 | 2015-09-02 | 庆东纳碧安株式会社 | Boiler system using fuel cell |
| CN107338599A (en) * | 2017-07-06 | 2017-11-10 | 杭州依翰丝绸文化创意有限公司 | Being capable of spontaneous electrically heated rapid steamer |
| CN109361000A (en) * | 2018-09-04 | 2019-02-19 | 新地能源工程技术有限公司 | Integral coal gasification solid oxide fuel cell-steam turbine combined generating system and technique |
| CN110017529A (en) * | 2019-04-24 | 2019-07-16 | 杭州圣檀服饰有限公司 | A kind of steam afterheat recovery device |
| CN114094242A (en) * | 2021-12-29 | 2022-02-25 | 重庆大学 | Flow type photoelectrochemical cell for treating desulfurization wastewater and reducing carbon dioxide simultaneously |
| CN115000460A (en) * | 2022-05-25 | 2022-09-02 | 天津大学 | Operation method and system based on SOFC-GT combined heat and power system |
-
2002
- 2002-05-10 CN CNB021116423A patent/CN1151575C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913294B (en) * | 2005-08-11 | 2010-04-14 | 株式会社神户制钢所 | Electric power generating device |
| CN102569859A (en) * | 2012-01-11 | 2012-07-11 | 华北电力大学 | Integrated oxygen transmission membrane (OTM) pressurized carbon dioxide (CO2) zero-emission solid oxide fuel cell (SOFC)/gas transmission (GT)/air transmission (AT)/steam turbine (ST) composite power system |
| CN102569859B (en) * | 2012-01-11 | 2014-05-14 | 华北电力大学 | Integrated oxygen transmission membrane (OTM) pressurized carbon dioxide (CO2) zero-emission solid oxide fuel cell (SOFC)/gas transmission (GT)/air transmission (AT)/steam turbine (ST) composite power system |
| CN102628402A (en) * | 2012-04-17 | 2012-08-08 | 西安交通大学 | Fuel cell and organic Rankine cycle combined power generating system based on LNG (Liquefied Natural Gas) cold energy utilization |
| CN104884873A (en) * | 2012-12-28 | 2015-09-02 | 庆东纳碧安株式会社 | Boiler system using fuel cell |
| CN103206307A (en) * | 2013-04-03 | 2013-07-17 | 华北电力大学 | Hybrid power system using normal pressure MCFC (molten carbonate fuel cell) to recover CO2 in exhaust gas of gas turbine |
| CN103206307B (en) * | 2013-04-03 | 2015-06-24 | 华北电力大学 | Hybrid power system using normal pressure MCFC (molten carbonate fuel cell) to recover CO2 in exhaust gas of gas turbine |
| CN107338599A (en) * | 2017-07-06 | 2017-11-10 | 杭州依翰丝绸文化创意有限公司 | Being capable of spontaneous electrically heated rapid steamer |
| CN109361000A (en) * | 2018-09-04 | 2019-02-19 | 新地能源工程技术有限公司 | Integral coal gasification solid oxide fuel cell-steam turbine combined generating system and technique |
| CN110017529A (en) * | 2019-04-24 | 2019-07-16 | 杭州圣檀服饰有限公司 | A kind of steam afterheat recovery device |
| CN114094242A (en) * | 2021-12-29 | 2022-02-25 | 重庆大学 | Flow type photoelectrochemical cell for treating desulfurization wastewater and reducing carbon dioxide simultaneously |
| CN114094242B (en) * | 2021-12-29 | 2023-09-15 | 重庆大学 | Flow type photoelectrochemical cell for treating desulfurization wastewater and simultaneously reducing carbon dioxide |
| CN115000460A (en) * | 2022-05-25 | 2022-09-02 | 天津大学 | Operation method and system based on SOFC-GT combined heat and power system |
| CN115000460B (en) * | 2022-05-25 | 2023-12-26 | 天津大学 | Operation method and system based on SOFC-GT combined heat and power combined supply system |
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| Publication number | Publication date |
|---|---|
| CN1151575C (en) | 2004-05-26 |
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