JPH11204125A - Fuel-cell generating equipment - Google Patents

Fuel-cell generating equipment

Info

Publication number
JPH11204125A
JPH11204125A JP10002934A JP293498A JPH11204125A JP H11204125 A JPH11204125 A JP H11204125A JP 10002934 A JP10002934 A JP 10002934A JP 293498 A JP293498 A JP 293498A JP H11204125 A JPH11204125 A JP H11204125A
Authority
JP
Japan
Prior art keywords
exhaust gas
line
cathode
gas
combustor
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.)
Granted
Application number
JP10002934A
Other languages
Japanese (ja)
Other versions
JP3882307B2 (en
Inventor
Hajime Saito
一 斉藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP00293498A priority Critical patent/JP3882307B2/en
Publication of JPH11204125A publication Critical patent/JPH11204125A/en
Application granted granted Critical
Publication of JP3882307B2 publication Critical patent/JP3882307B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
    • 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
    • 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

  • 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)
  • Fuel Cell (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a fuel-cell generating equipment such that, at emergency stoppage, a cathode exhaust gas is surely introduced into a combustor and an anode exhaust gas is completely burned and discharged, without the use of an expensive high-temperature type ball valve an also without installing an extra anode exhaust-gas line separately. SOLUTION: An emergency isolation valve 30 is installed between a cathode exhaust-gas line 5 by which a part of the cathode exhaust gas is introduced into a combustor, and a circulation line 3 by which a part of the cathode exhaust gas is supplied from the downstream side of the cathode exhaust-gas line 5 to a carbon-dioxide recycle line. Hereby, at a plant emergency shutdown, the whole cathode exhaust gas is introduced into a combustor 13 and an anode exhaust gas is completely burned in the combustor 13 by closing the emergency isolation valve 30. The combustion exhaust gas flows backwards in the circulation line 3, enters into an exhaust-heat utilization line 6, and then is discharged as it is to the outside of the system.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、緊急遮断時に内部
のガスを安全かつ確実に排気できる燃料電池発電設備に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell power generation system capable of safely and surely exhausting internal gas during an emergency shutdown.

【０００２】[0002]

【従来の技術】溶融炭酸塩型燃料電池は、高効率で環境
への影響が少ないなど、従来の発電装置にない特徴を有
しており、水力、火力、原子力に続く発電システムとし
て注目を集め、現在鋭意研究が進められている。2. Description of the Related Art Molten carbonate fuel cells have features not found in conventional power generators, such as high efficiency and low environmental impact, and have attracted attention as power generation systems following hydro, thermal and nuclear power. Currently, intensive research is underway.

【０００３】図２は都市ガスを燃料とする溶融炭酸塩型
燃料電池を用いた発電設備の一例を示す図である。この
図において、発電設備は、都市ガス等に水蒸気を混合し
た燃料ガス１を水素を含むアノードガスに改質する改質
器１２と、酸素を含むカソードガスと水素を含むアノー
ドガスとから発電する燃料電池１０とを備えており、改
質器１２で作られるアノードガスはアノードガスライン
２により燃料電池１０に供給され、燃料電池１０の中で
その大部分を消費してアノード排ガスとなり、アノード
排ガスライン４により燃焼用ガスとして燃焼器１３へ供
給される。FIG. 2 is a diagram showing an example of a power generation facility using a molten carbonate fuel cell using city gas as fuel. In this figure, a power generation facility generates power from a reformer 12 that reforms a fuel gas 1 in which water vapor is mixed with city gas or the like into an anode gas containing hydrogen, and a cathode gas containing oxygen and an anode gas containing hydrogen. A fuel cell 10 is provided, and the anode gas produced in the reformer 12 is supplied to the fuel cell 10 through the anode gas line 2, and most of the anode gas is consumed in the fuel cell 10 to become an anode exhaust gas. The gas is supplied to the combustor 13 through the line 4 as combustion gas.

【０００４】燃焼器１３ではアノード排ガス中の可燃成
分（水素、一酸化炭素、メタン等）を燃焼して高温の燃
焼排ガスを生成し、改質器１２の加熱室に供給しこの燃
焼排ガスにより改質室を加熱し、改質室で改質触媒によ
り燃料ガスを改質してアノードガスとする。アノードガ
スは燃料予熱器１４によって燃料ガスライン１を流れる
蒸気と混合した燃料ガスと熱交換し、燃料電池１０のア
ノードに供給される。また加熱室を出た燃焼排ガスは炭
酸ガスリサイクルライン７で炭酸ガスリサイクルブロワ
２２によりカソードに供給される。燃焼排ガスには多量
の炭酸ガスが含まれており、電池反応に必要な炭酸ガス
の供給源となる。空気ライン８からの空気が炭酸ガスリ
サイクルブロワ２２の出側に供給されカソードの電池反
応に必要な酸素を供給する。カソードから排出されるカ
ソード排ガスの一部は循環ライン３により炭酸ガスリサ
イクルライン７に流入しカソードに供給される。このカ
ソード排ガスと燃焼排ガスと空気が混合してカソードガ
スとなりカソードに供給される。なお、８ａは空気ブロ
ア、１５は循環ライン３の流量を調節するリサイクル流
量調節弁である。The combustor 13 burns combustible components (hydrogen, carbon monoxide, methane, etc.) in the anode exhaust gas to generate high-temperature combustion exhaust gas, which is supplied to a heating chamber of the reformer 12 and reformed by the combustion exhaust gas. The fuel chamber is heated, and the fuel gas is reformed by the reforming catalyst in the reforming chamber to produce anode gas. The anode gas exchanges heat with the fuel gas mixed with the steam flowing through the fuel gas line 1 by the fuel preheater 14 and is supplied to the anode of the fuel cell 10. Further, the combustion exhaust gas exiting the heating chamber is supplied to the cathode by a carbon dioxide gas recycling blower 22 in a carbon dioxide gas recycling line 7. The combustion exhaust gas contains a large amount of carbon dioxide, and serves as a supply source of carbon dioxide required for the battery reaction. Air from the air line 8 is supplied to the outlet side of the carbon dioxide gas recycle blower 22 to supply oxygen required for a cathode cell reaction. A part of the cathode exhaust gas discharged from the cathode flows into the carbon dioxide gas recycling line 7 through the circulation line 3 and is supplied to the cathode. The cathode exhaust gas, the combustion exhaust gas, and the air are mixed to form a cathode gas, which is supplied to the cathode. Reference numeral 8a denotes an air blower, and 15 denotes a recycle flow rate control valve for controlling the flow rate of the circulation line 3.

【０００５】カソードガスは燃料電池１０内で電池反応
して高温のカソード排ガスとなり、一部は循環ライン３
によりカソードに循環し、他の一部はカソード排ガスラ
イン５により燃焼器１３へ供給され、残部は排熱利用ラ
イン６で空気を圧縮する圧縮機を駆動するタービン圧縮
機１８で動力を回収した後、さらに排熱回収蒸気発生装
置２０で熱エネルギを回収して系外に排出される。な
お、この排熱回収蒸気発生装置２０で発生した蒸気が蒸
気ライン９により燃料ガスライン１に入り、燃料ガスと
混合して改質器１２に送られる。また、１９はエキスパ
ンダーであり、高圧のカソード排ガスを膨張させてエネ
ルギーを回収するようになっている。The cathode gas undergoes a cell reaction in the fuel cell 10 to become a high-temperature cathode exhaust gas.
And the other part is supplied to the combustor 13 by the cathode exhaust gas line 5, and the rest is recovered by the turbine compressor 18 that drives the compressor that compresses air in the exhaust heat utilization line 6. Further, the heat energy is recovered by the exhaust heat recovery steam generator 20 and discharged outside the system. The steam generated by the exhaust heat recovery steam generator 20 enters the fuel gas line 1 through the steam line 9, mixes with the fuel gas, and is sent to the reformer 12. Reference numeral 19 denotes an expander, which expands high-pressure cathode exhaust gas to recover energy.

【０００６】[0006]

【発明が解決しようとする課題】上述した燃料電池発電
設備において、プラント緊急停止時にはカソード排ガス
を確実に燃焼器１３に導き、アノード排ガスを完全燃焼
して排気する必要がある。そのため、従来の設備では、
ＣＯ2 リサイクルブロア２２の入口側と排熱回収蒸気発
生装置２０の出口間を結ぶアノード排ガスライン２４を
設け、このラインに、緊急開放弁１６ａ，流量調節弁
（コントロール弁）１６ｂを設け、かつ排熱回収蒸気発
生装置２０の出口側に出口閉鎖弁１７を設けて緊急開放
弁１６ａ，流量調節弁１６ｂとアノード排ガスライン２
４を介して排気していた。すなわち、図２に太線で示す
ように、出口閉鎖弁１７を閉鎖し、緊急開放弁１６ａ，
１６ｂを開放することにより、カソード排ガスをカソー
ド排ガスライン５から確実に燃焼器１３に供給し、アノ
ード排ガスを燃焼させて、その排ガスをアノード排ガス
ライン２４を介して排気することができる。In the above-described fuel cell power generation system, it is necessary to reliably guide the cathode exhaust gas to the combustor 13 and to exhaust the anode exhaust gas completely after the emergency stop of the plant. Therefore, with conventional equipment,
An anode exhaust gas line 24 connecting the inlet side of the CO 2 recycle blower 22 and the outlet of the exhaust heat recovery steam generator 20 is provided. In this line, an emergency opening valve 16a and a flow control valve (control valve) 16b are provided. An outlet closing valve 17 is provided on the outlet side of the heat recovery steam generator 20, and an emergency opening valve 16a, a flow control valve 16b and an anode exhaust gas line 2 are provided.
4 had been exhausted. That is, as shown by a thick line in FIG. 2, the outlet closing valve 17 is closed, and the emergency opening valves 16a,
By opening 16b, the cathode exhaust gas can be reliably supplied from the cathode exhaust gas line 5 to the combustor 13, the anode exhaust gas can be burned, and the exhaust gas can be exhausted through the anode exhaust gas line 24.

【０００７】しかし、アノード排ガスライン２４に設置
する緊急開放弁１６ａは、常用時に高温ガスを完全にシ
ールする必要があるので、高価な高温タイプのボール弁
を使用する必要があった。そのため、この緊急開放弁１
６ａと共に、緊急開放弁１６ｂ、出口閉鎖弁１７、及び
アノード排ガスライン２４の設置に費用がかかり過ぎる
問題点があった。However, since the emergency release valve 16a installed in the anode exhaust gas line 24 needs to completely seal the high-temperature gas during normal use, it is necessary to use an expensive high-temperature type ball valve. Therefore, this emergency opening valve 1
6a, the installation of the emergency opening valve 16b, the outlet closing valve 17, and the anode exhaust gas line 24 was too expensive.

【０００８】本発明はかかる問題点を解決するために創
案されたものである。すなわち、本発明の目的は、高価
な高温タイプのボール弁を用いることなく、かつ余分な
アノード排ガスラインを別個に設けることなく、緊急停
止時にカソード排ガスを確実に燃焼器に導き、アノード
排ガスを完全燃焼して排気することができる燃料電池発
電設備を提供することにある。The present invention has been made to solve such a problem. That is, an object of the present invention is to reliably guide the cathode exhaust gas to the combustor at the time of an emergency stop without using an expensive high-temperature type ball valve and separately providing an extra anode exhaust gas line, thereby completely removing the anode exhaust gas. An object of the present invention is to provide a fuel cell power generation facility capable of burning and exhausting.

【０００９】[0009]

【課題を解決するための手段】本発明によれば、カソー
ドとアノードを有し酸素を含むカソードガスと水素を含
むアノードガスから発電する燃料電池（１０）と、カソ
ード排ガスでアノード排ガスを燃焼する燃焼器（１３）
と、燃焼器の燃焼排ガスで水蒸気を含む燃料ガスを改質
する改質器（１２）と、カソード排ガスの一部を燃焼器
に導くカソード排ガスライン（５）と、燃焼器の燃焼排
ガスをカソードに循環させる炭酸ガスリサイクルライン
（７）と、カソード排ガスラインの下流側からカソード
排ガスの一部を炭酸ガスリサイクルラインに供給する循
環ライン（３）と、循環ラインの更に下流側からカソー
ド排ガスの残部を熱エネルギを回収して系外に排出する
排熱利用ライン（６）とを備えた燃料電池発電設備にお
いて、カソード排ガスライン（５）と循環ライン（３）
の間に緊急遮断弁（３０）を設けたことを特徴とする燃
料電池発電設備が提供される。According to the present invention, a fuel cell (10) having a cathode and an anode and generating electricity from a cathode gas containing oxygen and an anode gas containing hydrogen, and burning the anode exhaust gas with the cathode exhaust gas. Combustor (13)
A reformer (12) for reforming fuel gas containing water vapor with the combustion exhaust gas of the combustor; a cathode exhaust gas line (5) for leading a part of the cathode exhaust gas to the combustor; Gas recycling line (7), a part of the cathode exhaust gas from the downstream side of the cathode exhaust gas line to the carbon dioxide recycling line (3), and the remainder of the cathode exhaust gas from the further downstream side of the circulation line And a circulation line (3) in a fuel cell power generation facility provided with a waste heat utilization line (6) for recovering heat energy and discharging the heat outside the system.
The fuel cell power generation equipment is characterized in that an emergency shut-off valve (30) is provided between the two.

【００１０】上記本発明の構成によれば、プラント緊急
停止時に緊急遮断弁（３０）を閉鎖することにより、カ
ソード排ガスを全量燃焼器に導入し、燃焼器（１３）内
でアノード排ガスを完全に燃焼させて排気できる。この
燃焼排ガスは、循環ライン（３）を逆流して排熱利用ラ
イン（６）に入り、そのまま系外が排出される。従っ
て、プラント緊急停止時用に従来のように独立したアノ
ード排ガスライン２４を設置する必要がない。According to the configuration of the present invention, the cathode exhaust gas is completely introduced into the combustor by completely closing the anode exhaust gas in the combustor (13) by closing the emergency shutoff valve (30) at the time of emergency stop of the plant. Can be burned and exhausted. This combustion exhaust gas flows backward through the circulation line (3), enters the exhaust heat utilization line (6), and is discharged outside the system as it is. Therefore, there is no need to provide a separate anode exhaust gas line 24 for the emergency stop of the plant unlike the related art.

【００１１】また、緊急遮断弁（３０）は、カソード排
ガスの系統ライン内に設置されるので常用／緊急停止時
共にその間を完全にシールする必要がなく、高価なボー
ル弁の代わりに安価なダンパ弁を用いることができる。
更に、従来と比べてアノード排ガスライン２４と共にそ
の緊急開放弁１６ａ，コントロール弁１６ｂ及び排熱回
収蒸気発生装置の出口遮断弁１７も不要となり、大幅な
低コスト化が実現できる。Further, since the emergency shutoff valve (30) is installed in the system line of the cathode exhaust gas, it is not necessary to completely seal the space between the normal and emergency stop, and an inexpensive damper is used instead of an expensive ball valve. Valves can be used.
Further, the emergency release valve 16a, the control valve 16b, and the outlet cutoff valve 17 of the exhaust heat recovery steam generator are not required in addition to the anode exhaust gas line 24 as compared with the conventional case, so that the cost can be significantly reduced.

【００１２】[0012]

【発明の実施の形態】以下、本発明の好ましい実施形態
について図面を参照して説明する。なお、各図において
共通する部分には同一の符号を付し、重複した説明を省
略する。図１は、本発明の燃料電池発電設備の全体構成
図である。この図において、本発明の燃料電池発電設備
は、カソードとアノードを有し酸素を含むカソードガス
と水素を含むアノードガスから発電する燃料電池１０
と、カソード排ガスでアノード排ガスを燃焼する燃焼器
１３と、燃焼器の燃焼排ガスで水蒸気を含む燃料ガスを
改質する改質器１２と、カソード排ガスの一部を燃焼器
１３に導くカソード排ガスライン５と、燃焼器１３の燃
焼排ガスをカソードに循環させる炭酸ガスリサイクルラ
イン７と、カソード排ガスラインの下流側からカソード
排ガスの一部を炭酸ガスリサイクルライン７に供給する
循環ライン３と、循環ライン３の更に下流側からカソー
ド排ガスの残部を熱エネルギを回収して系外に排出する
排熱利用ライン６とを備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the common parts in the respective drawings, and the duplicate description will be omitted. FIG. 1 is an overall configuration diagram of the fuel cell power generation equipment of the present invention. In this figure, the fuel cell power generation equipment of the present invention is a fuel cell 10 having a cathode and an anode, and generating electricity from a cathode gas containing oxygen and an anode gas containing hydrogen.
A combustor 13 for burning the anode exhaust gas with the cathode exhaust gas, a reformer 12 for reforming a fuel gas containing water vapor with the combustion exhaust gas from the combustor, and a cathode exhaust gas line for leading a part of the cathode exhaust gas to the combustor 13 5, a carbon dioxide gas recycling line 7 for circulating the combustion exhaust gas from the combustor 13 to the cathode, a circulation line 3 for supplying a part of the cathode exhaust gas to the carbon dioxide gas recycling line 7 from a downstream side of the cathode exhaust gas line, and a circulation line 3. And a waste heat utilization line 6 for recovering the heat energy of the remaining portion of the cathode exhaust gas from the further downstream side and discharging the heat energy to the outside of the system.

【００１３】更に、図１の燃料電池発電設備は、図２の
燃料電池発電設備と比較すると、図２における遮断弁１
６ａ，コントロール弁１６ｂ，出口遮断弁１７、アノー
ド排ガスライン２４が省略され、その代わりに緊急遮断
弁３０が追加されている。その他の構成は、図２に示し
た燃料電池発電設備と同様である。緊急遮断弁３０は、
カソード排ガスライン５と循環ライン３の間に設けられ
ている。この緊急遮断弁３０には、比較的安価な安価な
ダンパ弁（バタフライ弁）を用いるのがよい。ダンパ弁
は、完全にシールする機能はないが、カソード排ガスラ
イン５と循環ライン３の両方がカソード排ガスが流れる
ラインであるためその必要性がない。すなわち、カソー
ド排ガスの系統ライン内に設置されるので常用／緊急停
止時共にその間を完全にシールする必要がなく、高価な
ボール弁の代わりに安価なダンパ弁を用いることができ
る。Further, the fuel cell power generation equipment of FIG. 1 is different from the fuel cell power generation equipment of FIG.
6a, the control valve 16b, the outlet cutoff valve 17, and the anode exhaust gas line 24 are omitted, and an emergency shutoff valve 30 is added instead. Other configurations are the same as those of the fuel cell power generation equipment shown in FIG. The emergency shutoff valve 30
It is provided between the cathode exhaust gas line 5 and the circulation line 3. As the emergency cutoff valve 30, a relatively inexpensive and inexpensive damper valve (butterfly valve) is preferably used. Although the damper valve does not have a function of completely sealing, there is no necessity because both the cathode exhaust gas line 5 and the circulation line 3 are lines through which the cathode exhaust gas flows. That is, since it is installed in the system line of the cathode exhaust gas, it is not necessary to completely seal the space between the service and the emergency stop, and an inexpensive damper valve can be used instead of an expensive ball valve.

【００１４】上述した本発明の構成によれば、プラント
緊急停止時に緊急遮断弁３０を閉鎖することにより、図
１に太線で示すように、カソード排ガスを全量燃焼器１
３に導入し、燃焼器１３内でアノード排ガスを完全に燃
焼させて排気できる。この燃焼排ガスは、循環ライン３
を逆流して排熱利用ライン６に入り、そのまま系外が排
出される。従って、プラント緊急停止時用に従来のよう
に独立したアノード排ガスライン２４を設置する必要が
ない。According to the configuration of the present invention described above, by closing the emergency shut-off valve 30 at the time of an emergency stop of the plant, as shown by the thick line in FIG.
3 to exhaust the exhaust gas by completely burning the anode exhaust gas in the combustor 13. This combustion exhaust gas is supplied to the circulation line 3
Flows back into the waste heat utilization line 6, and the outside of the system is discharged as it is. Therefore, there is no need to provide a separate anode exhaust gas line 24 for the emergency stop of the plant unlike the related art.

【００１５】また、アノード排ガスライン２４と共にそ
の緊急開放弁１６ａ，コントロール弁１６ｂ及び排熱回
収蒸気発生装置の出口遮断弁１７も不要となり、大幅な
低コスト化が実現できる。In addition to the anode exhaust gas line 24, the emergency opening valve 16a, the control valve 16b, and the outlet cutoff valve 17 of the exhaust heat recovery steam generator are not required, so that significant cost reduction can be realized.

【００１６】なお、本発明は上述した実施形態に限定さ
れず、本発明の要旨を逸脱しない限りで、種々に変更で
きることは勿論である。It should be noted that the present invention is not limited to the above-described embodiment, and may be variously modified without departing from the gist of the present invention.

【００１７】[0017]

【発明の効果】上述した本発明により、従来のアノード
排ガス系統を削除することで低コスト化を図ることが可
能になった。特に、アノード排ガスライン２４に設置し
た緊急開放弁１６ａは１台で４千万円近くするため低コ
スト化の障害になっていたが、カソード出口に安価（２
００万円程度）なダンパ弁３０を設けるだけで、同様の
機能を発揮させることができる。従って、アノード排ガ
スライン等を含めて約５千万円のコストダウンができ、
これは出力１０００ｋｗ規模で５万円／ｋｗのコストダ
ウンに相当する。According to the present invention described above, it is possible to reduce the cost by eliminating the conventional anode exhaust gas system. In particular, the emergency release valve 16a installed in the anode exhaust gas line 24 was close to 40 million yen per unit, which hindered cost reduction.
The same function can be exerted only by providing the damper valve 30 (about 100,000 yen). Therefore, the cost can be reduced by about 50 million yen including the anode exhaust gas line, etc.
This is equivalent to a cost reduction of 50,000 yen / kw with an output of 1,000 kW.

【００１８】従って、本発明の燃料電池発電設備は、高
価な高温タイプのボール弁を用いることなく、かつ余分
なアノード排ガスラインを別個に設けることなく、緊急
停止時にカソード排ガスを確実に燃焼器に導き、アノー
ド排ガスを完全燃焼して排気することができる、等の優
れた効果を有する。Therefore, the fuel cell power generation equipment of the present invention reliably supplies cathode exhaust gas to the combustor during an emergency stop without using an expensive high-temperature type ball valve and without providing an extra anode exhaust gas line separately. It has an excellent effect such that the anode exhaust gas can be completely burned and exhausted.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の燃料電池発電設備の全体構成図であ
る。FIG. 1 is an overall configuration diagram of a fuel cell power generation facility of the present invention.

【図２】従来の燃料電池発電設備の全体構成図である。FIG. 2 is an overall configuration diagram of a conventional fuel cell power generation facility.

【符号の説明】[Explanation of symbols]

１ 燃料ガスライン ２ アノードガスライン ３ 循環ライン ４ アノード排ガスライン ５ カソード排ガスライン ６ 排熱利用ライン ７ 炭酸ガスリサイクルライン ８ 空気ライン ８ａ 空気ブロア ９ 蒸気ライン １０ 燃料電池 １２ 改質器 １３ 燃焼器 １４ 燃料予熱器 １６ａ，１６ｂ １７ 出口閉鎖弁 １８ タービン圧縮機 １９ エキスパンダー ２０ 排熱回収蒸気発生装置 ２２ 炭酸ガスリサイクルブロワ ２４ アノード排ガスライン ３０ 緊急遮断弁 DESCRIPTION OF SYMBOLS 1 Fuel gas line 2 Anode gas line 3 Circulation line 4 Anode exhaust gas line 5 Cathode exhaust gas line 6 Exhaust heat utilization line 7 Carbon dioxide gas recycling line 8 Air line 8a Air blower 9 Steam line 10 Fuel cell 12 Reformer 13 Combustor 14 Fuel Preheaters 16a, 16b 17 Outlet closing valve 18 Turbine compressor 19 Expander 20 Exhaust heat recovery steam generator 22 Carbon dioxide gas recycle blower 24 Anode exhaust gas line 30 Emergency shut-off valve

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 カソードとアノードを有し酸素を含むカ
ソードガスと水素を含むアノードガスから発電する燃料
電池（１０）と、カソード排ガスでアノード排ガスを燃
焼する燃焼器（１３）と、燃焼器の燃焼排ガスで水蒸気
を含む燃料ガスを改質する改質器（１２）と、カソード
排ガスの一部を燃焼器に導くカソード排ガスライン
（５）と、燃焼器の燃焼排ガスをカソードに循環させる
炭酸ガスリサイクルライン（７）と、カソード排ガスラ
インの下流側からカソード排ガスの一部を炭酸ガスリサ
イクルラインに供給する循環ライン（３）と、循環ライ
ンの更に下流側からカソード排ガスの残部を熱エネルギ
を回収して系外に排出する排熱利用ライン（６）とを備
えた燃料電池発電設備において、カソード排ガスライン
（５）と循環ライン（３）の間に緊急遮断弁（３０）を
設けた、ことを特徴とする燃料電池発電設備。1. A fuel cell (10) having a cathode and an anode and generating electricity from a cathode gas containing oxygen and an anode gas containing hydrogen, a combustor (13) burning the anode exhaust gas with the cathode exhaust gas, A reformer (12) for reforming a fuel gas containing water vapor with the combustion exhaust gas, a cathode exhaust gas line (5) for guiding a part of the cathode exhaust gas to the combustor, and a carbon dioxide gas for circulating the combustion exhaust gas from the combustor to the cathode A recycling line (7), a circulation line (3) for supplying a part of the cathode exhaust gas to the carbon dioxide gas recycling line from the downstream side of the cathode exhaust gas line, and a heat energy recovery for the remaining portion of the cathode exhaust gas from a further downstream side of the circulation line. In a fuel cell power plant equipped with a waste heat utilization line (6) for discharging the exhaust gas outside the system, a cathode exhaust gas line (5) and a circulation line (3) ), An emergency shutoff valve (30) is provided between the fuel cell power generation equipment.
JP00293498A 1998-01-09 1998-01-09 Fuel cell power generation facility Expired - Fee Related JP3882307B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP00293498A JP3882307B2 (en) 1998-01-09 1998-01-09 Fuel cell power generation facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP00293498A JP3882307B2 (en) 1998-01-09 1998-01-09 Fuel cell power generation facility

Publications (2)

Publication Number Publication Date
JPH11204125A true JPH11204125A (en) 1999-07-30
JP3882307B2 JP3882307B2 (en) 2007-02-14

Family

ID=11543191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP00293498A Expired - Fee Related JP3882307B2 (en) 1998-01-09 1998-01-09 Fuel cell power generation facility

Country Status (1)

Country Link
JP (1) JP3882307B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029622A2 (en) * 2003-09-19 2005-03-31 Nissan Motor Co., Ltd. Fuel cell power plant
JP2005190962A (en) * 2003-12-26 2005-07-14 Ishikawajima Harima Heavy Ind Co Ltd Fuel cell power generating equipment and purging method of inflammable gas in fuel cell power generating equipment
KR101358132B1 (en) * 2012-02-02 2014-02-25 삼성중공업 주식회사 Fuel exhausting system for ship

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029622A2 (en) * 2003-09-19 2005-03-31 Nissan Motor Co., Ltd. Fuel cell power plant
WO2005029622A3 (en) * 2003-09-19 2006-07-27 Nissan Motor Fuel cell power plant
JP2005190962A (en) * 2003-12-26 2005-07-14 Ishikawajima Harima Heavy Ind Co Ltd Fuel cell power generating equipment and purging method of inflammable gas in fuel cell power generating equipment
KR101358132B1 (en) * 2012-02-02 2014-02-25 삼성중공업 주식회사 Fuel exhausting system for ship

Also Published As

Publication number Publication date
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