JPH0658807B2 - Fuel cell plant - Google Patents
Fuel cell plantInfo
- Publication number
- JPH0658807B2 JPH0658807B2 JP62243742A JP24374287A JPH0658807B2 JP H0658807 B2 JPH0658807 B2 JP H0658807B2 JP 62243742 A JP62243742 A JP 62243742A JP 24374287 A JP24374287 A JP 24374287A JP H0658807 B2 JPH0658807 B2 JP H0658807B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- electrode
- fuel
- air
- outlet
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
-
- 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)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は燃料電池プラントに関するものである。TECHNICAL FIELD The present invention relates to a fuel cell plant.
従来燃料電池に発生した水分を一定濃度に調節し、空気
極および燃料極の入口にリサイクルするため空気、燃料
極の出口側にセパレータを取付けた流路構成が考案され
ている。この流路構成では一定の水分を含んだ空気極、
燃料極の排ガスがリホーマに流入する。このため空気
極、燃料極配管中に水分の凝縮により水がたまり、電池
の極間差圧に悪影響を及ぼす欠点があつた。なお、これ
に関するものとして特開昭60−7068号公報がある。Conventionally, there has been devised a flow path configuration in which a separator is attached to the outlet side of air and the fuel electrode in order to adjust the water content generated in the fuel cell to a certain concentration and recycle it to the inlets of the air electrode and the fuel electrode. In this flow path configuration, the air electrode containing a certain amount of water,
Exhaust gas from the fuel electrode flows into the reformer. For this reason, water is accumulated in the air electrode and fuel electrode pipes due to the condensation of water, which adversely affects the cell-to-electrode differential pressure. Incidentally, there is JP-A-60-7068 as one related to this.
上記従来技術は空気極および燃料極にリサイクルする水
分量を調節するために、空気極および燃料極の出口側に
気水分離器を取付けたものである。これでは気水分離器
出口側のガス中に一定量のスチームが含まれることにな
り、このため気水分離器出口側で水分が凝縮し、電池か
らリホーマ燃焼部に至るまでの配管（以下、リホーマ配
管という）内にたまる可能性がある。このリホーマ配管
中の水分のために運転時の電池差圧が不規則的に変動す
ることおよび継続的に極間差圧が増大すること等の問題
があつた。In the above-mentioned conventional technique, a steam separator is attached to the outlet side of the air electrode and the fuel electrode in order to adjust the amount of water recycled to the air electrode and the fuel electrode. This means that a certain amount of steam is contained in the gas on the steam-water separator outlet side, so water is condensed on the steam-water separator outlet side, and the piping from the battery to the reformer combustion section (hereinafter, There is a possibility of accumulating in the reformer piping). Due to the water in the reformer piping, there are problems such as the cell differential pressure fluctuating irregularly during operation and the inter-electrode differential pressure continuously increasing.
本発明は以上の点に鑑みなされたものであり、リホーマ
配管中の水分蓄積による電池差圧への悪影響を除去する
ことを可能とした燃料電池プラントを提供することを目
的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a fuel cell plant capable of eliminating the adverse effect on the cell differential pressure due to water accumulation in the reformer piping.
上記目的は、空気極、燃料極と気水分離器との間に夫々
熱交換器を設けると共に、熱交換器の中間部および出口
側にガス流出口を設け、中間部のガス流出口と空気、燃
料再循環系、出口側のガス流出口と気水分離器とを夫々
連結することにより、達成される。The purpose is to provide a heat exchanger between the air electrode, the fuel electrode, and the steam separator, respectively, and to provide a gas outlet at the intermediate portion and the outlet side of the heat exchanger, and to provide a gas outlet at the intermediate portion and an air outlet. , A fuel recirculation system, a gas outlet on the outlet side, and a steam separator are connected to each other.
空気極，燃料極と気水分離器との間に設けた熱交換器の
中間部のガス流出口と空気、燃料再循環系，出口側のガ
ス流出口と気水分離器とを夫々連結したので、空気，燃
料再循環系には必要な水分を含むガスが抽出・供給さ
れ、気水分離器には充分よく脱水されたガスが抽出・供
給されるようになる。このように気水分離器には充分よ
く脱水されたガスが供給されるので、電池の差圧に直接
影響をおよぼす電池とリホーマ燃焼部との間のリホーマ
配管中のガスの水分濃度を低下させることができる。従
つてリホーマ配管内への水分の凝縮を防止することがで
き、運転中の電池差圧への悪影響を防止することができ
る。The gas outlet in the middle of the heat exchanger provided between the air electrode, the fuel electrode and the steam separator and air, the fuel recirculation system, the gas outlet on the outlet side and the steam separator were respectively connected. Therefore, the gas containing necessary moisture is extracted and supplied to the air and fuel recirculation system, and the sufficiently dehydrated gas is extracted and supplied to the steam separator. In this way, the gas-water separator is supplied with sufficiently dehydrated gas, so that the moisture concentration of the gas in the reformer piping between the battery and the reformer combustion section, which directly affects the differential pressure of the battery, is reduced. be able to. Therefore, it is possible to prevent the condensation of water in the reformer pipe and prevent the adverse effect on the battery differential pressure during operation.
以下、図示した実施例に基づいて本発明を説明する。第
１図には本発明の一実施例が示されている。同図に示さ
れているように燃料電池プラントは空気極１および燃料
極２、これら空気極１，燃料極２からの排ガスが夫々流
入する気水分離器３ａ，３ｂおよび排ガスの一部が空
気、燃料極１，２に再循環する空気再循環系４、燃料再
循環系５を備えている。そして空気再循環系４は流量調
節弁６ａ、リサイクルブロワ７ａを備え、燃料再循環系
５は流量調節弁６ｂ、リサイクルブロワ７ｂを備えてい
る。そしてまた空気極１の入口には空気流量調節弁８、
燃料極２の入口には入口流量調節弁９が設けられ、気水
分離器３ａ，３ｂには流路抵抗１０ａ，１０ｂを通して
リホーマ燃焼部１１が設けられている。このように構成
された燃料電池システムの本実施例では空気極１、燃料
極２と気水分離器３ａ，３ｂとの間に夫々熱交換器１２
ａ，１２ｂを設けると共に、熱交換器１２ａ，１２ｂの
中間部および出口側にガス流出口を設け、中間部のガス
流出口と空気、燃料再循環系４，５，出口側のガス流出
口と気水分離器３ａ，３ｂとを夫々連結した。このよう
にすることにより熱交換器１２ａ，１２ｂで水分がとら
れて流路抵抗１０ａ，１０ｂ側には水分が行かないよう
になつて、リホーマ配管中の水分蓄積による電池差圧へ
の悪影響を除去することを可能とした燃料電池システム
を得ることができる。Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 shows an embodiment of the present invention. As shown in the figure, in a fuel cell plant, an air electrode 1 and a fuel electrode 2, steam-water separators 3a and 3b into which exhaust gases from the air electrode 1 and the fuel electrode 2 respectively flow, and a part of the exhaust gas is air. , An air recirculation system 4 and a fuel recirculation system 5 which are recirculated to the fuel electrodes 1 and 2. The air recirculation system 4 includes a flow rate control valve 6a and a recycle blower 7a, and the fuel recirculation system 5 includes a flow rate control valve 6b and a recycle blower 7b. And again, at the inlet of the air electrode 1, an air flow control valve 8,
An inlet flow rate control valve 9 is provided at the inlet of the fuel electrode 2, and a reformer combustion section 11 is provided in the steam separators 3a and 3b through flow path resistors 10a and 10b. In this embodiment of the fuel cell system configured as described above, the heat exchanger 12 is provided between the air electrode 1, the fuel electrode 2 and the steam separators 3a and 3b, respectively.
a and 12b are provided, and gas outlets are provided at the intermediate portion and the outlet side of the heat exchangers 12a and 12b, and the gas outlet at the intermediate portion and air, the fuel recirculation systems 4,5, and the gas outlet at the outlet side. The steam separators 3a and 3b were connected to each other. By doing so, moisture is taken off by the heat exchangers 12a and 12b so that moisture does not flow to the flow path resistances 10a and 10b, and the adverse effect on the battery differential pressure due to the accumulation of moisture in the reformer piping is prevented. A fuel cell system that can be removed can be obtained.
すなわち空気極１の系では空気流量調節弁８から空気が
流入し、流量調節弁６ａからはリサイクルガスが流入
し、空気極入口で混合された後、空気極１に流入する。
空気極１では燃料極２に流入した水素と空気極１に流入
した酸素とから電流および水を発生する。窒素，残酸
素，水等より構成される空気極１の排ガスは空気極１の
出口の熱交換器１２ａおよび気水分離器３ａ、更にその
他の機器より構成される流路抵抗１０ａを経てリホーマ
燃焼部１１に流入する。一方、燃料極２の系では入口流
量調節弁９を介してリホーマ（図示せず）からの改質ガ
スが流入し、流量調節弁６ｂからは燃料極２のリサイク
ルガスが流入する。これら両ガスは燃料極２の入口で合
流し、燃料極２に流入する。燃料極２では空気極１の酸
素と燃料極ガス中の水素から電流を発生し、この時空気
極側に生成される水分の一部も燃料極側に流れ込む。こ
のため燃料極２の排ガスは熱交換器１２ｂおよび気水分
離器３ｂ、更にその他の機器等により構成される流路抵
抗１０ｂを経てリホーマ燃焼部１１に流入する。なお１
３は外部から熱交換器１２ａ，１２ｂに入る流体水であ
る。ところで空気極１、燃料極２へのリサイクルガスに
対しては電池の運転性能を保持するために一定量の水分
を確保する必要がある。一方、リホーマ燃焼部１１に流
入する空気極１および燃料極２の排ガスについてはリホ
ーマ燃焼部１１に流入するまでのリホーマ配管部で水分
が凝縮し、運転中の電池差圧に悪影響をおよぼすことを
防止するために、ガス中の水分を充分に分離しておくこ
とが望ましい。このような条件を満足させるため本実施
例では燃料極２および空気極１の下流側に設置した熱交
換器１２ｂ，１２ａの中央部および出口側に２個のガス
流出口を取付け、熱交換器１２ａ，１２ｂの中央部のガ
ス流出口からはリサイクル用のガスを取出し、出口側の
最下流側からはリホーマ燃焼部１１に流出するガスを取
出すようにした。このようにすることによりガス中に一
定量の水分が必要なリサイクルガスについては、ガス中
の水分凝縮の不充分な熱交換器１２ａ，１２ｂ中央部か
らのガスが使用でき、リホーマ燃焼部１１に向うガスに
ついては充分脱水したガスを流すことができる。これに
よりプラント運転中にリホーマ配管内に発生する凝縮水
による運転時の電池差圧への悪影響を除去することがで
きる。このように本実施例によれば電池運転時の差圧発
生の原因となる燃料極２、空気極１の排ガス中の水分を
除去すると共に、電池運転時に必要な水分をリサイクル
ガスにより供給することができる。That is, in the system of the air electrode 1, air flows in from the air flow rate control valve 8 and recycle gas flows in from the flow rate control valve 6a, is mixed at the air electrode inlet, and then flows into the air electrode 1.
In the air electrode 1, an electric current and water are generated from the hydrogen flowing into the fuel electrode 2 and the oxygen flowing into the air electrode 1. Exhaust gas of the air electrode 1 composed of nitrogen, residual oxygen, water and the like passes through the heat exchanger 12a at the outlet of the air electrode 1 and the steam separator 3a, and the flow path resistance 10a composed of other devices to reform the reformer. It flows into the part 11. On the other hand, in the system of the fuel electrode 2, the reformed gas from the reformer (not shown) flows in through the inlet flow rate control valve 9, and the recycled gas of the fuel electrode 2 flows in from the flow rate control valve 6b. Both of these gases join at the inlet of the fuel electrode 2 and flow into the fuel electrode 2. In the fuel electrode 2, an electric current is generated from oxygen in the air electrode 1 and hydrogen in the fuel electrode gas, and at this time, part of the water generated on the air electrode side also flows into the fuel electrode side. Therefore, the exhaust gas of the fuel electrode 2 flows into the reformer combustion section 11 via the heat exchanger 12b, the steam separator 3b, and the flow path resistance 10b composed of other devices. 1
3 is fluid water which enters the heat exchangers 12a and 12b from the outside. By the way, it is necessary to secure a certain amount of water for the recycled gas to the air electrode 1 and the fuel electrode 2 in order to maintain the operating performance of the battery. On the other hand, regarding the exhaust gas of the air electrode 1 and the fuel electrode 2 flowing into the reformer combustion unit 11, water is condensed in the reformer piping portion until flowing into the reformer combustion unit 11, which adversely affects the cell differential pressure during operation. In order to prevent this, it is desirable to sufficiently separate the water content in the gas. In order to satisfy such a condition, in this embodiment, two gas outlets are attached to the central portion and the outlet side of the heat exchangers 12b and 12a installed on the downstream side of the fuel electrode 2 and the air electrode 1, and the heat exchangers are installed. The gas for recycling was taken out from the gas outlets at the central portions of 12a and 12b, and the gas flowing out to the reformer combustion section 11 was taken out from the most downstream side on the outlet side. By doing so, for the recycle gas that requires a certain amount of water in the gas, the gas from the center of the heat exchangers 12a and 12b, which has insufficient moisture condensation in the gas, can be used and the reformer combustion unit 11 can be used. As for the gas to be passed, a sufficiently dehydrated gas can be flowed. As a result, it is possible to eliminate the adverse effect of the condensed water generated in the reformer pipe during the plant operation on the battery differential pressure during the operation. As described above, according to the present embodiment, the moisture in the exhaust gas of the fuel electrode 2 and the air electrode 1 which causes the differential pressure during the operation of the cell is removed, and at the same time, the moisture necessary for the operation of the cell is supplied by the recycled gas. You can
上述のように本発明はリホーマ配管中の水分蓄積による
電池差圧への悪影響が除去できるようになつて、リホー
マ配管中の水分蓄積による電池差圧への悪影響を除去す
ることを可能とした燃料電池プラントを得ることができ
る。As described above, according to the present invention, the adverse effect on the cell differential pressure due to the water accumulation in the reformer piping can be removed, and the adverse effect on the cell differential pressure due to the water accumulation in the reformer piping can be removed. A battery plant can be obtained.
第１図は本発明の燃料電池システムの一実施例のフロー
図である。 １……空気極、２……燃料極、３ａ，３ｂ……気水分離
器、４……空気再循環系、５……燃料再循環系、１２
ａ，１２ｂ……熱交換器。FIG. 1 is a flow chart of an embodiment of the fuel cell system of the present invention. 1 ... Air electrode, 2 ... Fuel electrode, 3a, 3b ... Air / water separator, 4 ... Air recirculation system, 5 ... Fuel recirculation system, 12
a, 12b ... Heat exchanger.
Claims (1)
給される燃料極を有する燃料電池と、前記空気極からの
排ガス及び前記燃料極からの排ガスが流入するリホーマ
燃焼部を有するリホーマと、前記空気極からの排ガスの
一部を該空気極に再循環する空気再循環系と、前記燃料
極からの排ガスの一部を該燃料極に再循環する燃料再循
環系とを備えた燃料電池プラントにおいて、 前記空気極と前記リホーマ燃焼部を結ぶ排ガス経路中に
中間部のガス流出口と出口側のガス流出口を有する第１
の熱交換器及び第１の気水分離器をこの順序で設けると
ともに、前記燃料極と前記リホーマ燃焼部を結ぶ排ガス
経路中に中間部のガス流出口と出口側のガス流出口を有
する第２の熱交換器及び第２の気水分離器をこの順序で
設け、第１の熱交換器の中間部のガス流出口を空気再循
環系に、出口側のガス流出口を第１の気水分離器に夫々
連結し、第２の熱交換器の中間部のガス流出口を燃料再
循環系に、出口側のガス流出口を第２の気水分離器に夫
々連結したことを特徴とする燃料電池プラント。1. A reformer having a fuel cell having an air electrode to which air is supplied and a fuel electrode to which a reformed gas is supplied, and a reformer combustion section into which exhaust gas from the air electrode and exhaust gas from the fuel electrode flow. And an air recirculation system for recirculating a part of the exhaust gas from the air electrode to the air electrode, and a fuel recirculation system for recirculating a part of the exhaust gas from the fuel electrode to the fuel electrode. In a fuel cell plant, a gas outlet on an intermediate side and a gas outlet on an outlet side are provided in an exhaust gas path connecting the air electrode and the reformer combustion section.
A heat exchanger and a first steam separator in this order, and a second gas outlet having an intermediate gas outlet and an outlet gas outlet in an exhaust gas path connecting the fuel electrode and the reformer combustion unit. The heat exchanger and the second steam / water separator are installed in this order, the gas outlet in the middle of the first heat exchanger is used as the air recirculation system, and the gas outlet on the outlet side is used as the first steam / water. Characterized in that the gas outlets in the middle of the second heat exchanger are connected to the fuel recirculation system and the gas outlets on the outlet side are connected to the second steam separator, respectively. Fuel cell plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243742A JPH0658807B2 (en) | 1987-09-30 | 1987-09-30 | Fuel cell plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243742A JPH0658807B2 (en) | 1987-09-30 | 1987-09-30 | Fuel cell plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6489156A JPS6489156A (en) | 1989-04-03 |
| JPH0658807B2 true JPH0658807B2 (en) | 1994-08-03 |
Family
ID=17108312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62243742A Expired - Fee Related JPH0658807B2 (en) | 1987-09-30 | 1987-09-30 | Fuel cell plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658807B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2442252B (en) * | 2006-09-27 | 2010-10-27 | Intelligent Energy Ltd | Low temperature operation of open cathode fuel cell stacks using air recirculation |
| JP2009238392A (en) * | 2008-03-25 | 2009-10-15 | Equos Research Co Ltd | Fuel cell system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0824049B2 (en) * | 1985-05-31 | 1996-03-06 | 株式会社東芝 | Fuel cell power generation system |
-
1987
- 1987-09-30 JP JP62243742A patent/JPH0658807B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6489156A (en) | 1989-04-03 |
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