JPH0831335B2 - Fuel cell power generation system - Google Patents
Fuel cell power generation systemInfo
- Publication number
- JPH0831335B2 JPH0831335B2 JP61265048A JP26504886A JPH0831335B2 JP H0831335 B2 JPH0831335 B2 JP H0831335B2 JP 61265048 A JP61265048 A JP 61265048A JP 26504886 A JP26504886 A JP 26504886A JP H0831335 B2 JPH0831335 B2 JP H0831335B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fuel cell
- generated gas
- expander
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
- H01M8/0643—Gasification of solid fuel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/14—Fuel cells with fused electrolytes
- H01M2008/147—Fuel cells with molten carbonates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0048—Molten electrolytes used at high temperature
- H01M2300/0051—Carbonates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
- H01M2300/0071—Oxides
- H01M2300/0074—Ion conductive at high temperature
-
- 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
Landscapes
- Fuel Cell (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は固体電解質型燃料電池（Solid Oxided Fuel
Cell:SOFC）発電システム又は溶融炭酸塩型燃料電池シ
ステムの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid oxide fuel cell (Solid Oxided Fuel).
Cell: SOFC) power generation system or molten carbonate fuel cell system.
近年、エネルギ需要の増加、石油等の不足により、石
炭の利用が再認識されてきた。そこで石炭利用の１つと
して研究，開発されているものとして石炭ガス化炉（以
下CCGCと称す）がある。このCCGCと高効率発電システム
として注目されているSOFC発電システムとの組み合せに
より、新技術高効率発電システムが得られた。In recent years, the use of coal has been re-recognized due to an increase in energy demand and a shortage of oil. Therefore, as one of the utilization of coal, there is a coal gasifier (hereinafter referred to as CCGC) that is being researched and developed. By combining this CCGC with the SOFC power generation system, which has been attracting attention as a high-efficiency power generation system, a new technology high-efficiency power generation system was obtained.
第２図は従来型のCCGC組み合せによるSOFC発電システ
ムである。第２図において、CCGC1より出た高圧の発生
ガスはエキスパンダ２により減圧される。しかし、SOFC
4の最適圧力まで減圧する場合、発生ガスはSOFC4の最適
温度以下となるため、十分に減圧することが出来ない。
そこで、エキスパンダ２を出た発生ガスはそのままSOFC
4に導びかれるか、または、第２図に示すようなオリフ
ィス３で減圧し、SOFC4に導びかれる。SOFC4のアノード
７から出たSOFC燃料ガスと、カソード５から出た空気
は、コンバスタ８で混合，燃料させ、燃焼排ガスはカソ
ード空気を予熱するため、エアーヒータ９に送り込ま
れ、ボトミングサイクルへ導びかれる。Figure 2 shows a SOFC power generation system using a conventional CCGC combination. In FIG. 2, the expander 2 decompresses the high-pressure generated gas emitted from the CCGC 1. But SOFC
When the pressure is reduced to the optimum pressure of 4, the generated gas is below the optimum temperature of SOFC4, so it cannot be sufficiently reduced.
Therefore, the gas generated from expander 2 is SOFC as it is.
4 or the pressure is reduced by the orifice 3 as shown in FIG. 2 and the SOFC 4 is led. The SOFC fuel gas emitted from the anode 7 of the SOFC 4 and the air emitted from the cathode 5 are mixed and fueled by the combustor 8, and the combustion exhaust gas is sent to the air heater 9 to preheat the cathode air, leading to the bottoming cycle. Get burned.
第２図のような構成の従来のSOFC発電システムの場
合、CCGC1の高圧発生ガスを１段のエキスパンダ２によ
り減圧、エネルギ回収を行なっていたが、それではエキ
スパンダ２の出口ガスの温度が低くなり過ぎるため、SO
FC4の最適圧力、あるいは温度に設定することが出来な
かった。そのため、今までの解決方法としてはエキスパ
ンダ２の下流にオリフィス３を設置するかまたは、高圧
型SOFC発電システムを考える必要がある。しかし、前者
の方法は、減圧時における圧力エネルギを無駄に失うこ
とになり、また後者は高圧に対する密閉設備、カソード
５、アノード７間の圧力差制御設備等、膨大な設備費用
がかかり、実現性に乏しいといえる。In the case of the conventional SOFC power generation system configured as shown in FIG. 2, the high-pressure generated gas of CCGC1 was decompressed and energy was recovered by the one-stage expander 2, but the temperature of the outlet gas of the expander 2 was low. SO becomes too much
The optimum pressure or temperature of FC4 could not be set. Therefore, as a solution to date, it is necessary to install an orifice 3 downstream of the expander 2 or to consider a high-pressure SOFC power generation system. However, the former method wastes pressure energy during depressurization, and the latter requires enormous equipment costs such as closed equipment for high pressure, equipment for controlling the pressure difference between the cathode 5 and the anode 7, etc. Can be said to be scarce.
そこで、本発明はCCGC発生ガスがエキスパンダにより
過冷却することなく、外部エネルギの補給なしに発生ガ
スをSOFCの最適温度、圧力に設定でき、圧力エネルギの
無駄をなくすことができる固体電解質型燃料電池発電シ
ステムを提供することを目的とする。Therefore, the present invention is a solid electrolyte fuel which can set the generated gas to the optimum temperature and pressure of SOFC without supercooling the CCGC generated gas by an expander and without replenishment of external energy, and can eliminate the waste of pressure energy. An object is to provide a battery power generation system.
本発明は前記目的を達成するため、石炭ガス化炉から
得られる高圧発生ガスを、燃料として固体電解質型燃料
電池又は溶融炭酸塩型燃料電池に供給する燃料供給系を
備えた燃料電池発電システムにおいて、 前記燃料供給系に前記高圧の発生ガスを入力して第１
の所定圧力値に減圧し、低圧の発生ガスとし出力する第
１のエキスパンダと、 この第１のエキスパンダからの低圧の発生ガスを入力
して所定の温度に加熱して出力する排熱を利用した燃料
ガス予熱器と、 この燃料ガス予熱器で加熱された低圧の発生ガスを入
力して第２の所定圧力値に減圧し、低圧の発生ガスとし
出力する第２のエキスパンダとを設け、 前記石炭ガス化炉より得られた高圧の発生ガスを、前
記固体電解質型燃料電池又は溶融炭酸塩型燃料電池に使
用可能な圧力まで減圧すると共に、エネルギーを回収す
るようにしたことを特徴とする燃料電池発電システムで
ある。In order to achieve the above-mentioned object, the present invention provides a fuel cell power generation system including a fuel supply system for supplying a high-pressure generated gas obtained from a coal gasification furnace to a solid oxide fuel cell or a molten carbonate fuel cell as a fuel. First, by inputting the high-pressure generated gas into the fuel supply system,
The first expander that reduces the pressure to a predetermined pressure value and outputs it as a low-pressure generated gas, and the exhaust heat that inputs the low-pressure generated gas from this first expander, heats it to a predetermined temperature, and outputs it. A fuel gas preheater used and a second expander for inputting the low-pressure generated gas heated by the fuel gas preheater to reduce the pressure to a second predetermined pressure value and outputting it as the low-pressure generated gas are provided. The high-pressure generated gas obtained from the coal gasification furnace is decompressed to a pressure usable for the solid oxide fuel cell or the molten carbonate fuel cell, and energy is recovered. Fuel cell power generation system.
〔作用〕 SOFCの最適温度、圧力に簡便に設定でき、また無駄に
捨てられていたエネルギの回収ができるとともに、最終
段のエキスパンダ入口ガス温度が高くなり、エキスパン
ダ効率が高くなり、プラント全体の効率が向上する。[Operation] The optimum temperature and pressure of SOFC can be easily set, and the wasted energy can be recovered, and the expander inlet gas temperature of the final stage becomes high, and the expander efficiency becomes high. Improves efficiency.
以下、本発明について第１図の実施例を参照して説明
する。The present invention will be described below with reference to the embodiment shown in FIG.
第１図はCCGC1とSOFC4間において、１段エキスパンダ
2aと燃料ガス予熱器10および２段エキスパンダ2bを設け
て従来のエキスパンダ２での過冷却をSOFC発電システム
で余る熱エネルギにより、１段,2段エキスパンダ2a,2b
間で予熱するシステムである。Figure 1 shows a one-stage expander between CCGC1 and SOFC4.
2a, the fuel gas preheater 10 and the two-stage expander 2b are provided to supercool the conventional expander 2 by the excess heat energy in the SOFC power generation system to generate the first and second stage expanders 2a, 2b.
It is a system that preheats between.
第１図のように構成されたものにおいて、CCGC1より
出た高圧の発生ガスは、１段エキスパンダ2aにより適当
な圧力に減圧される。この減圧された発生ガスは２段エ
キスパンダ出口2bの発生ガスのSOFC4の最適圧力に対す
る温度が適性値になるように燃料ガス予熱器10で発生ガ
スが予熱される。また、燃料予熱器10の熱源はボトミン
グサイクルの余った熱により（例えばガスタービン排ガ
スや排熱回収ボイラ発生水蒸気等）、供給される。その
ため、外部からの熱量補給なしに、CCGC1の高圧発生ガ
スをSOFC最適温度、圧力に設定が可能となり、さらに
は、減圧による全エネルギの回収が可能となった。In the configuration as shown in FIG. 1, the high-pressure generated gas emitted from CCGC1 is reduced to an appropriate pressure by the one-stage expander 2a. The reduced pressure generated gas is preheated by the fuel gas preheater 10 so that the temperature of the generated gas at the outlet 2b of the two-stage expander with respect to the optimum pressure of SOFC4 becomes an appropriate value. Further, the heat source of the fuel preheater 10 is supplied by the heat surplus in the bottoming cycle (for example, gas turbine exhaust gas or exhaust heat recovery boiler generated steam). Therefore, it was possible to set the high pressure gas of CCGC1 to the optimal SOFC temperature and pressure without supplementing the heat quantity from the outside, and it was possible to recover all energy by reducing the pressure.
いま、１段エキスパンダ2aの入口圧力が42ataで温度
が450℃、１段エキスパンダ2aの出口圧力が9.5ataで温
度が310℃、２段エキスパンダ2bの入口圧力が9.5ataで
温度430℃、２段エキスパンダ2bの出口圧力が1.2ataで
温度が200℃、SOFC4の燃料ガス最適温度が200℃のとき
回収エネルギ39,702kcal/sとなり、入熱701,599kcal/s
に対して、5.7％増のエネルギ回収が可能となり、これ
により効率も5.4％増となる。Now, the inlet pressure of the first stage expander 2a is 42ata and the temperature is 450 ° C. The outlet pressure of the first stage expander 2a is 9.5ata and the temperature is 310 ° C. The inlet pressure of the second stage expander 2b is 9.5ata and the temperature is 430 ° C. When the outlet pressure of the two-stage expander 2b is 1.2ata, the temperature is 200 ° C, and the optimum temperature of the SOFC4 fuel gas is 200 ° C, the recovered energy is 39,702 kcal / s, and the heat input is 701,599 kcal / s.
On the other hand, it is possible to recover energy by 5.7%, which will increase efficiency by 5.4%.
また、２段エキスパンダ2bを出た発生ガスは、SOFC4
のアノードを通り、反応後、コンバスタ８でカソード５
から出た空気と混合，燃焼される。そしてコンバスタ排
ガスはエアーヒータ９でカソード空気と熱交換され、ボ
トミングサイクルへと導びかれる。Also, the gas generated from the two-stage expander 2b is SOFC4.
After the reaction, the combustor 8 and the cathode 5
It is mixed and burned with the air that comes out. The combustor exhaust gas is heat-exchanged with the cathode air by the air heater 9, and is guided to the bottoming cycle.
以上述べた実施例によれば、SOFC4の最適温度，圧力
に簡単に設定でき、また無駄に捨てられていたエネルギ
の回収が出来るとともに、２段エキスパンダ2bの入口ガ
ス温度が高くなり、エキスパンダ効率が高くなり、プラ
ント全体の効率が向上する。According to the above-described embodiment, the optimum temperature and pressure of SOFC4 can be easily set, the energy wasted wasted can be recovered, and the inlet gas temperature of the two-stage expander 2b becomes high, so that the expander can be expanded. The efficiency is high and the efficiency of the entire plant is improved.
なお、本発明は固体電解質型燃料電池発電システムに
限らず、溶融炭酸塩型燃料電池発電システムにも適用で
きる。The present invention is applicable not only to the solid oxide fuel cell power generation system but also to a molten carbonate fuel cell power generation system.
以上詳述したように、本発明によれば、CCGC発生ガス
がエキスパンダにより過冷却することなく、外部エネル
ギの補給なしに発生ガスをSOFC最適温度，圧力に設定す
ることが出来る。さらには、オリフィスを使用せず、全
ての減圧をエキスパンダにより行なうため、無駄に捨て
るエネルギがなくなる燃料電池発電システムを提供でき
る。As described in detail above, according to the present invention, it is possible to set the generated gas at the SOFC optimum temperature and pressure without supercooling the CCGC generated gas by the expander and without supplementing external energy. Furthermore, since all the pressure reduction is performed by the expander without using an orifice, it is possible to provide a fuel cell power generation system that eliminates wasteful energy.
第１図は本発明の固体電解質型燃料電池発電システムの
一実施例を示す系統図、第２図は従来の固体電解質型燃
料電池発電システムの一例を示す系統図である。 １……石炭ガス化炉（CCGC）、2a……１段エキスパン
ダ、2b……２段エキスパンダ、４……固体電解質型燃料
電池、５……カソード、６……固体電解質、７……アノ
ード、８……コンバスタ、９……エアーヒータ、10……
燃料ガス予熱器。FIG. 1 is a system diagram showing an embodiment of a solid oxide fuel cell power generation system of the present invention, and FIG. 2 is a system diagram showing an example of a conventional solid oxide fuel cell power generation system. 1 ... Coal gasifier (CCGC), 2a ... 1 stage expander, 2b ... 2 stage expander, 4 ... Solid electrolyte fuel cell, 5 ... Cathode, 6 ... Solid electrolyte, 7 ... Anode, 8 ... Combustor, 9 ... Air heater, 10 ...
Fuel gas preheater.
Claims (1)
を、燃料として固体電解質型燃料電池又は溶融炭酸塩型
燃料電池に供給する燃料供給系を備えた燃料電池発電シ
ステムにおいて、 前記燃料供給系に前記高圧の発生ガスを入力して第１の
所定圧力値に減圧し、低圧の発生ガスとし出力する第１
のエキスパンダと、 この第１のエキスパンダからの低圧の発生ガスを入力し
て所定の温度に加熱して出力する排熱を利用した燃料ガ
ス予熱器と、 この燃料ガス予熱器で加熱された低圧の発生ガスを入力
して第２の所定圧力値に減圧し、低圧の発生ガスとし出
力する第２のエキスパンダとを設け、 前記石炭ガス化炉より得られた高圧の発生ガスを、前記
固体電解質型燃料電池又は溶融炭酸塩型燃料電池に使用
可能な圧力まで減圧すると共に、エネルギーを回収する
ようにしたことを特徴とする燃料電池発電システム。1. A fuel cell power generation system comprising a fuel supply system for supplying a high-pressure generated gas obtained from a coal gasification furnace as a fuel to a solid oxide fuel cell or a molten carbonate fuel cell. A first that inputs the high-pressure generated gas into the system, reduces the pressure to a first predetermined pressure value, and outputs it as a low-pressure generated gas
Expander, a fuel gas preheater that uses exhaust heat that inputs low-pressure generated gas from this first expander, heats it to a predetermined temperature, and outputs it, and was heated by this fuel gas preheater. A second expander for inputting the low-pressure generated gas to reduce the pressure to a second predetermined pressure value and outputting as a low-pressure generated gas is provided, and the high-pressure generated gas obtained from the coal gasification furnace is A fuel cell power generation system, characterized in that the pressure is reduced to a pressure usable for a solid oxide fuel cell or a molten carbonate fuel cell, and energy is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61265048A JPH0831335B2 (en) | 1986-11-07 | 1986-11-07 | Fuel cell power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61265048A JPH0831335B2 (en) | 1986-11-07 | 1986-11-07 | Fuel cell power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63119165A JPS63119165A (en) | 1988-05-23 |
| JPH0831335B2 true JPH0831335B2 (en) | 1996-03-27 |
Family
ID=17411856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61265048A Expired - Fee Related JPH0831335B2 (en) | 1986-11-07 | 1986-11-07 | Fuel cell power generation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0831335B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4155461B2 (en) | 2003-10-15 | 2008-09-24 | アイシン・エィ・ダブリュ株式会社 | Electric vehicle drive control device and electric vehicle drive control method |
-
1986
- 1986-11-07 JP JP61265048A patent/JPH0831335B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 吉澤四郎「燃料電池と電力貯蔵システム（昭６０−３−１）講談社Ｐ．１０２−１０４ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63119165A (en) | 1988-05-23 |
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