JPH0287480A - Operation stopping method of fuel cell power generation device - Google Patents
Operation stopping method of fuel cell power generation deviceInfo
- Publication number
- JPH0287480A JPH0287480A JP63240048A JP24004888A JPH0287480A JP H0287480 A JPH0287480 A JP H0287480A JP 63240048 A JP63240048 A JP 63240048A JP 24004888 A JP24004888 A JP 24004888A JP H0287480 A JPH0287480 A JP H0287480A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- pressure
- reformer
- fuel cell
- gas
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 48
- 238000010248 power generation Methods 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 10
- 239000002737 fuel gas Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 238000002407 reforming Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 238000003487 electrochemical reaction Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 abstract description 18
- 239000007789 gas Substances 0.000 abstract description 13
- 239000002360 explosive Substances 0.000 abstract description 6
- 210000004027 cell Anatomy 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
-
- 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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、改質装置を有する燃料電池ことに小型の移
動用に使用される燃料!池発電装置の運転停止方法に関
する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a fuel cell having a reformer and a fuel used for small-sized transportation! This invention relates to a method for stopping operation of a pond power generation device.
例えばf8動用電源として使用される比較的小規模な燃
料電池発電システムでは、メタノール改質りん酸型燃料
電池が多く採用されている。For example, methanol-reformed phosphoric acid fuel cells are often used in relatively small-scale fuel cell power generation systems used as F8 power sources.
かかる発′8!装置は燃料電池スタックと改質装置を組
合せ、この改質装置を通じて原料のメタノールと水を水
素リッチな燃料ガスに改質した上で、この燃料ガスを燃
、M¥lL池スタウスタックし−ご発電を行うようにし
ている。It takes '8! The device combines a fuel cell stack and a reformer, and through this reformer, the raw materials methanol and water are reformed into hydrogen-rich fuel gas, and this fuel gas is burned and sent to the M\L Stout stack - to generate electricity. I try to do this.
このような燃料電池発電装置は運転停止の際、装置の燃
料ガス供給系と排出系とからなる燃料ガス系統全体を窒
素や炭酸ガスなどからなる不活性ガスでもって燃料ガス
と!41して系統内での爆鳴気の形成を防止し、次の起
動に際し安全に燃料ガスが供給できて運転に入ることが
できた。このために従来では不活性ガス!i!遺装置、
ないしは不活性ガスタンク等をあらかじめ用意して置き
、燃料電池の運転停止の際には、まず改’J[装置への
原料の供給を停止して電池本体の燃料ガス供給を中断す
るとともに、一方では系内に残留している燃料ガスの電
池反応による消費減少分、および温度低下に伴うガス体
積の減少分を補うように前記した不活性ガス発生装置な
いし不活性ガスタンクより不活性ガスを系内に導入する
方法で対処していた。When such a fuel cell power generation device stops operating, the entire fuel gas system consisting of the fuel gas supply system and exhaust system of the device is replaced with fuel gas using an inert gas such as nitrogen or carbon dioxide! 41, preventing the formation of explosive gas within the system, and allowing fuel gas to be safely supplied and operation to begin at the next startup. For this reason, conventionally inert gas is used! i! remains,
Alternatively, prepare an inert gas tank, etc. in advance, and when stopping the operation of the fuel cell, first stop the supply of raw materials to the device, interrupt the fuel gas supply to the cell body, and at the same time Inert gas is introduced into the system from the above-mentioned inert gas generator or inert gas tank to compensate for the reduced consumption of fuel gas remaining in the system due to cell reactions and the reduced gas volume due to temperature drop. The problem was dealt with by introducing methods.
従来の装置においては、別置される不活性ガス発生装置
あるいは不活性カスタンクなどを設aセねばならず、不
活性カス供給系の設備費、ランニングコストに加えてそ
の保守管理が厄介である等の問題の他に、さらに不活性
ガス供給系設備の付設により発電システムが大形化する
など、特に装置の小形化と、保守の1納易化が望まれる
移動電源用小規模燃料%L池発を装置では問題であった
。この発明はこの点にかんがみ、その連転停止時Eこ供
給していた不活性ガスを不要とする燃料電池発電装置の
運転停止方法を提供するものである。In conventional equipment, it is necessary to install a separate inert gas generator or inert gas tank, which increases equipment costs and running costs for the inert gas supply system, as well as troublesome maintenance and management. In addition to this problem, the power generation system becomes larger due to the installation of inert gas supply system equipment, and small-scale fuel %L ponds for mobile power sources are particularly desired to have smaller equipment and easier maintenance. This was a problem with the device. In view of this point, the present invention provides a method for stopping the operation of a fuel cell power generating apparatus that eliminates the need for the inert gas that is supplied when the continuous operation is stopped.
上記課題を解決するために、この発明によれば、原料を
改質装置で水素リッチな燃料カスに改質して燃料電池ス
タックに供給し、電気化学反応により発電を行うととも
に、前記改JX装置のバーナには前記燃料電池スタック
から出る戸7ガスと助燃用燃料としてメタノールとが供
給されて、前記改質装置の加熱を行う燃料電池発電装置
の運転停止方法において、燃料電池の運転停止の直前に
改質装置内の改質管の圧力を高くして運転し、高い圧力
の燃料ガスを改質!fat:と燃料電池スタックとに封
入して運転停止するものとす・る。In order to solve the above problems, according to the present invention, a raw material is reformed into a hydrogen-rich fuel scum in a reformer and supplied to a fuel cell stack, and electricity is generated by an electrochemical reaction. In the method for stopping the operation of a fuel cell power generating apparatus in which the burner is supplied with gas exiting from the fuel cell stack and methanol as an auxiliary fuel to heat the reformer, immediately before the operation of the fuel cell is stopped. The reforming tube inside the reformer is operated at high pressure to reform the high pressure fuel gas! fat: and the fuel cell stack, and the operation is stopped.
この発明の方法によると、燃料電池発電装置の運転停止
直前tこ%改5を装置に改質用原料を多量に供給して圧
力をあげて運転し、発電装置の停止後に改質装置と燃料
電池スタックに封入状態に保持された燃料ガスが、改質
装置や燃料電池スタックの温度が外気により低下しても
、その圧力が大気圧力以下にならないようをこあらかじ
め設定された高い圧力で封入されているため、燃料系統
内の燃料ガスに外気より空気が混入して爆鳴気を形成す
るのが防止できる。これによって不活性ガスを使用して
燃料系統内の燃料カスをパージする必要がなくなる。According to the method of this invention, just before the operation of the fuel cell power generation apparatus is stopped, a large amount of reforming raw material is supplied to the fuel cell power generation apparatus, the pressure is raised, and the reformer is operated, and after the power generation apparatus is stopped, the reformer and the fuel The fuel gas kept sealed in the cell stack is sealed at a preset high pressure so that even if the temperature of the reformer or fuel cell stack drops due to outside air, the pressure will not drop below atmospheric pressure. Therefore, it is possible to prevent air from the outside air from mixing with the fuel gas in the fuel system and forming explosion air. This eliminates the need to use inert gas to purge fuel scum in the fuel system.
以下この発明を実施例に基づいて説明する。第1図はこ
の発明の実施例の方法に係わる系統図である。この図で
はメタノールの水蒸気改質による水素を燃料とするりん
葭屋燃S1+電池発′1装置で、メタノールと水とを1
:1.3モル比に混会した原料を原料人口1よりポンプ
2で弁3を介して改質装置11.4へ供給する。改質装
置4内に配された改質管5内では、管内に充填されたC
uとZn糸の触媒により原料は約250°Cにて下記の
反応により水素j2テな燃料ガスに改質される。The present invention will be explained below based on examples. FIG. 1 is a system diagram relating to a method according to an embodiment of the present invention. This figure shows the Rin Yoshiya Fuel S1+ battery generator'1 device, which uses hydrogen produced by steam reforming of methanol, to convert methanol and water into 1 unit.
:1.3 molar ratio of the raw materials is supplied from the raw material population 1 to the reformer 11.4 via the pump 2 and the valve 3. In the reforming tube 5 disposed in the reforming device 4, the C filled in the tube is
The raw material is reformed into hydrogen fuel gas by the following reaction at about 250°C by the catalyst of U and Zn yarn.
この改質ガスが弁7を経て燃1#+1!池スタック8に
供給されているが、スタック8では同時に反応用空気が
空気人口9より供給され排ガスは空気排出口10より排
出されている。燃料ガス中の水素と、空気中の酸素とが
スタック8内で電気化学反応によりMfJK、電力を発
電する。この反応は約190℃で行われていて発生した
直流電力はここでは図示していない負荷へ給電されてい
る。スタック8にて消費つくされない燃料ガスはオフガ
スとなって弁11を経て改質装置4のバーナ6に供給さ
れる。バーナ6では同時に空気人口12より供給された
空気と前記オフガスが燃焼し上式(1)に必要な熱を供
給している。改質装置14のバーナ6で燃焼されたあと
の排気は排ガス口15より排出されている。This reformed gas passes through valve 7 and burns 1#+1! In the stack 8, reaction air is simultaneously supplied from an air outlet 9 and exhaust gas is discharged from an air outlet 10. Hydrogen in the fuel gas and oxygen in the air undergo an electrochemical reaction in the stack 8 to generate electric power. This reaction takes place at approximately 190° C., and the generated DC power is supplied to a load (not shown). The fuel gas that is not consumed in the stack 8 becomes an off-gas and is supplied to the burner 6 of the reformer 4 via the valve 11. In the burner 6, the air supplied from the air supply 12 and the off-gas are simultaneously combusted to supply the heat necessary for the above equation (1). The exhaust gas after being burned in the burner 6 of the reformer 14 is discharged from the exhaust gas port 15.
このような燃料電池発電装置の運転停止に際し、まず弁
7と弁11とを閉じてあと弁14を開く。燃料′eL池
スメスタック燃料ガスの供給停止にともない約190℃
より徐々に温度が低下するが、これにともなってスタッ
ク8内の燃料ガス圧力か低下すると、升14を経て、圧
力pl整弁17を介して改!X装置でつくられた高圧の
燃料ガスが大気圧よりも若干高く圧力調整されてスタ、
り8に供給されるので、スタックは常に大気圧より高く
圧力が保持されて外気より空気を吸入して爆鳴気を生成
することがない。スタック8の温度低下やガス圧力の低
下が飽和した時点で、弁14を閉じてスタック8は、内
部の圧力を大気圧より高くした状態で封入されている。When shutting down the operation of such a fuel cell power generation device, first the valves 7 and 11 are closed, and then the valve 14 is opened. Fuel 'eL pond Smetac Approximately 190℃ due to suspension of fuel gas supply
The temperature gradually decreases, but when the fuel gas pressure inside the stack 8 decreases, it passes through the cell 14 and then through the pressure PL regulator 17. The high-pressure fuel gas created by the X device is regulated to a pressure slightly higher than atmospheric pressure, and then
8, the stack is always kept at a pressure higher than atmospheric pressure and does not suck in air from the outside and generate explosive gas. When the temperature drop and the gas pressure drop in the stack 8 reach saturation, the valve 14 is closed and the stack 8 is sealed in a state where the internal pressure is higher than atmospheric pressure.
一方改質装置4は運転停止に際し、燃料ガス系統を、大
気圧よりも高い圧力で運転させるため、ポンプ2を介し
て原料を供給しつづけ、圧力が設定されたIJ IJ−
フ9P13が開くまで運転を継続する。On the other hand, when the reformer 4 stops operating, the fuel gas system is operated at a pressure higher than atmospheric pressure, so raw material is continued to be supplied via the pump 2, and the IJ IJ-
Operation continues until F9P13 opens.
IJ IJ−フ弁13は、燃料ガスがある設定された圧
力以上にならないと開かない。IJ リーフ弁13が開
くまで改JR装置を運転し続けるには改″jk装置かも
つている余熱で熱の供給はほぼ間に合うが、治し余熱で
不充分の時には、燃料供給口16よりメタノールをバー
ナ6に供給して燃焼させて加勢をする。IJ IJ-F valve 13 does not open unless the fuel gas reaches a certain set pressure or higher. To continue operating the modified JR equipment until the IJ leaf valve 13 opens, the residual heat of the modified JK equipment is sufficient to supply heat, but if the residual heat is insufficient, methanol is supplied from the fuel supply port 16 to the burner 6. It is supplied to the fuel and burns it to provide support.
J 1−フ弁13が開動作したのを検出してポンプ2を
停止し、弁3を閉じて改質装置4を封止する。J1-Detecting that the valve 13 has opened, the pump 2 is stopped, the valve 3 is closed, and the reformer 4 is sealed.
改質装置4の温度が低下しても改質管5内のカス圧力が
大気圧以上に保持出来るようにIJ IJ−フ弁13の
圧力を設定しであるので、改質装f14は常に大気圧以
上の圧力lこ保持出来て外気より空気を吸入して爆鳴気
を形成することがない。したがってこの燃料電池発電装
置には、スタ、り8と改質装置4とに爆鳴気が入ってい
る恐れはないので、次回の運転開始にそなえて従来のよ
うに燃料系統を不活性カスで置換えする必袂がなくなる
。The pressure of the IJ valve 13 is set so that the scum pressure in the reformer tube 5 can be maintained above atmospheric pressure even if the temperature of the reformer 4 drops, so the reformer f14 is always kept at high pressure. It can maintain a pressure higher than the atmospheric pressure and will not suck in air from the outside and create explosive air. Therefore, in this fuel cell power generation system, there is no risk of explosive air entering the star, the reformer 8, and the reformer 4, so in preparation for the next start of operation, the fuel system should be filled with inert gas as before. There is no need to replace it.
この発明は前述のように燃料電池発電装置の運転終了時
に、不活性ガスで燃料系統内部を置換えする必要がなく
なるので、不活性ガス発生装置や不活性ガスタンクなど
の設備が不要となり、またそのランニングコストや保守
管理から解放され、さらに前記設備の設置により発電シ
ステムが大形化するなど、特に装置の小形化と保守の簡
易化が望まれる移動電源用小規模燃料V、池光発電装置
はその利点を発揮することができる。As mentioned above, this invention eliminates the need to replace the inside of the fuel system with inert gas at the end of operation of the fuel cell power generation system, thereby eliminating the need for equipment such as an inert gas generator and an inert gas tank. Small-scale fuel V and pond light power generation equipment for mobile power sources are particularly desirable because they are free from costs and maintenance management, and the power generation system becomes larger with the installation of the above equipment, making the equipment smaller and easier to maintain. can take advantage of it.
第1図はこの発明の実施例方法を説明するための燃料X
池発電装置を示す糸仇図である。
l・・・改質用原料入口、2・・・ポンプ、3 、7
、11 。
14・・・升、4・・・改質装置、5・・・改質管、6
・・・バーナ、8・・・燃料電池スタック、9・・・空
気入口、10・・・空気排出口、12°“°空気入口、
13・・・リリーフ升、15・・・排ガス口、16・・
・燃料供給口、17・・・圧力調整弁。
揃 l 四FIG. 1 shows fuel X for explaining the embodiment method of this invention.
It is a diagram showing a pond power generation device. l... Raw material inlet for reforming, 2... Pump, 3, 7
, 11. 14...Sho, 4...Reformer, 5...Reformer tube, 6
...burner, 8... fuel cell stack, 9... air inlet, 10... air outlet, 12°"° air inlet,
13... Relief box, 15... Exhaust gas port, 16...
・Fuel supply port, 17...pressure adjustment valve. set l four
Claims (1)
燃料電池スタックに供給し、電気化学反応により発電を
行うとともに、前記改質装置のバーナには前記燃料電池
スタックから出るオフガスと助燃用燃料としてメタノー
ルとが供給されて、前記改質装置の加熱を行う燃料電池
発電装置の運転停止方法において、燃料電池の運転停止
の直前に改質装置内の改質管の圧力を高くして運転し、
高い圧力の燃料ガスを改質装置と燃料電池スタックとに
封入して運転停止することを特徴とする燃料電池発電装
置の運転停止方法。1) The raw material is reformed into hydrogen-rich fuel gas in a reformer and supplied to the fuel cell stack to generate electricity through an electrochemical reaction. In a method for stopping operation of a fuel cell power generation device in which methanol is supplied as an auxiliary fuel to heat the reformer, the pressure in a reforming pipe in the reformer is increased immediately before stopping operation of the fuel cell. drive,
A method for stopping operation of a fuel cell power generation device, characterized in that the operation is stopped by sealing high pressure fuel gas into a reformer and a fuel cell stack.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63240048A JPH0287480A (en) | 1988-09-26 | 1988-09-26 | Operation stopping method of fuel cell power generation device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63240048A JPH0287480A (en) | 1988-09-26 | 1988-09-26 | Operation stopping method of fuel cell power generation device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0287480A true JPH0287480A (en) | 1990-03-28 |
Family
ID=17053702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63240048A Pending JPH0287480A (en) | 1988-09-26 | 1988-09-26 | Operation stopping method of fuel cell power generation device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0287480A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6743537B2 (en) | 2000-12-11 | 2004-06-01 | Toyota Jidosha Kabushiki Kaisha | Hydrogen gas generating systems, fuel cell systems and methods for stopping operation of fuel cell system |
EP1617942A2 (en) * | 2003-04-04 | 2006-01-25 | Texaco Development Corporation | Autothermal reforming in a fuel processor utilizing non-pyrophoric shift catalyst |
JP2006073376A (en) * | 2004-09-02 | 2006-03-16 | Mitsubishi Electric Corp | Polymer electrolyte fuel cell system |
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