JPH04257610A - Combustion apparatus of anode waste gas of fuel cell - Google Patents
Combustion apparatus of anode waste gas of fuel cellInfo
- Publication number
- JPH04257610A JPH04257610A JP3018975A JP1897591A JPH04257610A JP H04257610 A JPH04257610 A JP H04257610A JP 3018975 A JP3018975 A JP 3018975A JP 1897591 A JP1897591 A JP 1897591A JP H04257610 A JPH04257610 A JP H04257610A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- exhaust gas
- anode exhaust
- oxygen
- waste 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 68
- 239000000446 fuel Substances 0.000 title claims abstract description 16
- 239000002912 waste gas Substances 0.000 title abstract 7
- 239000007789 gas Substances 0.000 claims abstract description 76
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 22
- 239000001301 oxygen Substances 0.000 claims abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 22
- 239000000567 combustion gas Substances 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
Classifications
-
- 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
- Incineration Of Waste (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、溶融炭酸塩型燃料電池
発電システムに設けられる燃料電池アノード排ガスの燃
焼装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device for fuel cell anode exhaust gas provided in a molten carbonate fuel cell power generation system.
【０００２】0002
【従来の技術】溶融炭酸塩型燃料電池発電システムにお
いては、燃料電池のカソード（空気極）に二酸化炭素お
よび酸素を含んだカソードガスを供給し、一方アノード
（燃料極）には、天然ガス、石炭などの化石燃料を改質
して得られた水素および一酸化炭素などを含有する燃料
ガスを導入し、アノードで水素および一酸化炭素を供給
反応させた後、残存ガスをアノード排ガスとして排出さ
せている。このアノード排ガスは残留水素および一酸化
炭素を含有し可燃性のもので、これを酸素によって燃焼
させてその発生熱を熱交換器型リフォーマ等に供給する
とともに燃焼ガスをカソード（空気極）に供給するよう
にしている。[Prior Art] In a molten carbonate fuel cell power generation system, cathode gas containing carbon dioxide and oxygen is supplied to the cathode (air electrode) of the fuel cell, while natural gas, Fuel gas containing hydrogen and carbon monoxide obtained by reforming fossil fuels such as coal is introduced, and after the hydrogen and carbon monoxide are supplied and reacted at the anode, the remaining gas is discharged as anode exhaust gas. ing. This anode exhaust gas contains residual hydrogen and carbon monoxide and is flammable. It is combusted with oxygen and the generated heat is supplied to a heat exchanger type reformer, etc., and the combustion gas is supplied to the cathode (air electrode). I try to do that.
【０００３】このアノード排ガスを燃焼させる燃焼装置
として、特開平２−２６２２６３号公報には、触媒燃焼
器本体の出入口間に触媒層を多段に設けると共に、アノ
ード排ガス供給管にアノード排ガスを分配して触媒層間
にそれぞれ供給する分配手段を設けることによって、空
気に対するアノード排ガスの割合が見掛上水素の爆発限
界を越えても安全に運転できるようにした装置が開示さ
れている。[0003] As a combustion device for burning this anode exhaust gas, Japanese Patent Laid-Open No. 2-262263 discloses a method in which catalyst layers are provided in multiple stages between the entrance and exit of a catalytic combustor main body, and the anode exhaust gas is distributed to an anode exhaust gas supply pipe. A device is disclosed which allows safe operation even when the ratio of anode exhaust gas to air apparently exceeds the explosive limit of hydrogen by providing distribution means for feeding between the catalyst layers.
【０００４】しかし、この装置においては、触媒燃焼器
本体の入口側の空気導入口にアノード排ガス供給管が接
続され、その実施例からも明らかなように空気とアノー
ド排ガスとの予備混合室が燃焼装置本体の外部に設けら
れているため、予備混合室内で水素の爆発が起こらない
ように、したがって、水素の濃度が水素爆発限界に達し
ないように、アノード排ガスの各段への供給量を厳重に
制御しなければならない。したがって、その管理システ
ムも複雑なものとなる。However, in this device, the anode exhaust gas supply pipe is connected to the air inlet on the inlet side of the catalytic combustor main body, and as is clear from the embodiment, the premixing chamber for air and anode exhaust gas is used for combustion. Since it is installed outside the main body of the device, the amount of anode exhaust gas supplied to each stage must be strictly controlled to prevent hydrogen explosion within the premixing chamber and to prevent hydrogen concentration from reaching the hydrogen explosion limit. must be controlled. Therefore, its management system also becomes complicated.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、このような
アノード排ガスの各段への供給量の厳重な制御をしなく
ても、安全かつ効率的にアノード排ガスを燃焼させるこ
とができ、また耐久性および保守性にも優れた燃料電池
アノード排ガスの燃焼装置を提供することを目的とする
。[Problems to be Solved by the Invention] The present invention makes it possible to safely and efficiently burn anode exhaust gas without having to strictly control the amount of anode exhaust gas supplied to each stage. An object of the present invention is to provide a combustion device for fuel cell anode exhaust gas that has excellent durability and maintainability.
【０００６】[0006]
【課題を解決するための手段】本発明は、アノード排ガ
スと空気との混合、燃焼を全て燃焼装置本体内で行うよ
うにすれば、たとえアノード排ガス中の水素の発火およ
び燃焼が予備燃焼室において起こったとしても何らの危
険もなく安全に運転することができることに着目して完
成された。[Means for Solving the Problems] The present invention provides that if the mixing and combustion of anode exhaust gas and air are all performed within the combustion device main body, even if hydrogen in the anode exhaust gas is ignited and burned in the pre-combustion chamber. It was developed with the focus on the fact that even if something happens, you can drive safely without any danger.
【０００７】すなわち、本発明の燃料電池のアノード排
ガス燃焼装置は、酸素含有ガス導入口と複数のアノード
排ガス導入口と燃焼ガスの排出口とを備えた燃料電池ア
ノード排ガスの燃焼装置において、該燃焼装置本体内に
、（イ）アノード排ガスと酸素含有ガスとの予備燃焼室
、（ロ）板状混合層とハニカム状または板状触媒層とか
らなる接触床をそれぞれ複数段設け、前記酸素含有ガス
導入口が、最上流側の前記予備燃焼室に通ずるように設
けられ、前記複数のアノード排ガス導入口のそれぞれが
、複数段設けられた前記予備燃焼室のそれぞれに通ずる
ように設けられ、前記接触床に対して予備燃焼室が、お
よび前記触媒層に対して前記混合層がそれぞれ上流側に
設置されてなること、を特徴とするものである。That is, the fuel cell anode exhaust gas combustion apparatus of the present invention is a fuel cell anode exhaust gas combustion apparatus equipped with an oxygen-containing gas inlet, a plurality of anode exhaust gas inlets, and a combustion gas outlet. In the main body of the apparatus, (a) a preliminary combustion chamber for anode exhaust gas and an oxygen-containing gas, and (b) a plurality of contact beds each consisting of a plate-shaped mixed layer and a honeycomb-shaped or plate-shaped catalyst layer are provided, and the oxygen-containing gas is An inlet is provided so as to communicate with the preliminary combustion chamber on the most upstream side, each of the plurality of anode exhaust gas inlets is provided so as to communicate with each of the preliminary combustion chambers provided in a plurality of stages, and the contact It is characterized in that the pre-combustion chamber is installed upstream of the bed, and the mixing layer is installed upstream of the catalyst layer.
【０００８】[0008]
【作用】酸素含有ガスは酸素含有ガス導入口から、残留
水素および一酸化炭素を含有するアノード排ガスはアノ
ード排ガス導入口からそれぞれ予備燃焼室内に導入され
、ここで混合、部分的に燃焼（燃焼の起こらない場合も
ある）された後、混合層と触媒層からなる接触床を通過
する間に十分に混合され完全に燃焼されて燃焼ガスとな
って排出口から排出される。ここでアノード排ガスと酸
素含有ガスとの予備燃焼室と、接触床とが燃焼装置本体
内に設けられかつこれが複数段に設けられたので、極め
て安全に運転することができるとともにアノード排ガス
の効率的でＮＯｘ発生量の低い（最高１０ｐｐｍ）燃焼
を行うことができる。[Operation] Oxygen-containing gas is introduced into the pre-combustion chamber through the oxygen-containing gas inlet, and anode exhaust gas containing residual hydrogen and carbon monoxide is introduced into the pre-combustion chamber through the anode exhaust gas inlet, where they are mixed and partially combusted. After that, while passing through a contact bed consisting of a mixed layer and a catalyst layer, the mixture is sufficiently mixed and completely combusted to become combustion gas, which is discharged from the exhaust port. Here, a pre-combustion chamber for anode exhaust gas and oxygen-containing gas and a contact bed are provided in the main body of the combustion device, and these are provided in multiple stages, making it possible to operate extremely safely and efficiently converting anode exhaust gas. It is possible to perform combustion with low NOx generation (maximum 10 ppm).
【０００９】[0009]
【実施例】以下、図面に基づいて本発明の一実施例を説
明する。図１は、本発明の実施例による燃料電池のアノ
ード排ガス燃焼装置の断面図である。このアノード排ガ
ス燃焼装置１の本体２には、上部に酸素含有ガス導入口
３、側面に２個の第１および第２のアノード排ガス導入
口４，５、下部に燃焼ガスの排出口６が設けられている
。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a fuel cell anode exhaust gas combustion device according to an embodiment of the present invention. The main body 2 of this anode exhaust gas combustion device 1 is provided with an oxygen-containing gas inlet 3 at the top, two first and second anode exhaust gas inlets 4 and 5 at the side, and a combustion gas outlet 6 at the bottom. It is being
【００１０】燃焼装置本体２の内部には、板状の混合層
７と板状またはハニカム状の触媒層８とからなる第１の
接触床９および同様に板状の混合層１０と板状またはハ
ニカム状の触媒層１１とからなる第２の接触床１２が２
段に設けられ、それぞれの上流側には第１および第２の
予備燃焼室１３，１４が形成されている。また燃焼装置
本体２の上部には、燃焼装置１のスタートアップ時に使
用する、空気導入口１５，１６および燃料導入口１７を
備えたスタートアップバーナー１８が設けられている。Inside the combustion apparatus body 2, there is a first contact bed 9 consisting of a plate-shaped mixed layer 7 and a plate-shaped or honeycomb-shaped catalyst layer 8, and a plate-shaped mixed layer 10 and a plate-shaped or honeycomb-shaped catalyst layer 8. A second contact bed 12 consisting of a honeycomb-shaped catalyst layer 11 is
The combustion chambers are provided in stages, and first and second preliminary combustion chambers 13 and 14 are formed on the upstream side of each stage. Further, a startup burner 18 equipped with air inlets 15, 16 and a fuel inlet 17 is provided at the top of the combustion device main body 2, which is used when starting up the combustion device 1.
【００１１】燃焼装置本体の内部は耐火・断熱材１９で
ライニングされ略筒形、好ましくは略円筒形に形成され
、その外周を別種の耐火・断熱材２０で囲って装置本体
１を形成している。また、燃焼装置本体の内部には段部
２１，２２が形成されて上記第１および第２の接触床９
，１２を支持している。なお、燃焼装置本体内部の最下
部で高温の燃焼ガス流が直接当たる部分には、ハイアル
ミナなどの防護板２３を設置して耐火・断熱材を保護し
ている。The inside of the combustion device main body is lined with a fireproof/insulating material 19 and formed into a substantially cylindrical shape, preferably a substantially cylindrical shape, and the outer periphery thereof is surrounded by a different kind of fireproof/insulating material 20 to form the device main body 1. There is. Furthermore, stepped portions 21 and 22 are formed inside the combustion apparatus main body to accommodate the first and second contact beds 9.
, 12 are supported. Note that a protection plate 23 made of high alumina or the like is installed at the lowest part of the inside of the combustion apparatus main body, which is directly exposed to the flow of high-temperature combustion gas, to protect the fireproof/insulating material.
【００１２】以下、本発明の実施例における作用を説明
する。定常運転時において、予熱された酸素含有ガスは
酸素含有ガス導入口３から第１の予備燃焼室１３内に導
かれ、一方残留水素および一酸化炭素を含む予熱された
アノード排ガスはアノード排ガス導入口４から同じく第
１の予備燃焼室１３内に導かれる。ここで両ガスは混合
されるが、この時両ガスはいずれも高温、たとえばアノ
ード排ガスは６２５℃程度、酸素含有ガスは５００℃程
度に予熱されているため、水素ガスの発火や燃焼が起こ
りやすいが、該第１の予備燃焼室１３は耐火・断熱材１
９により覆われているので、発火や燃焼が起こっても何
らの危険を生ずることもない。この混合および予備燃焼
（場合によっては燃焼の起こらないこともある）された
ガスは板状混合層７を通過する間に十分に混合され、こ
の混合ガスは触媒層８を通過する間に残留水素および一
酸化炭素が酸素により完全に燃焼されて、第２の予備燃
焼室１４に導かれる。この第１の接触床９での燃焼温度
は８５０〜１０００℃程度であり、最高１０５０℃程度
までである。[0012] The functions of the embodiments of the present invention will be explained below. During steady operation, the preheated oxygen-containing gas is introduced into the first pre-combustion chamber 13 from the oxygen-containing gas inlet 3, while the preheated anode exhaust gas containing residual hydrogen and carbon monoxide is introduced into the anode exhaust gas inlet. 4 into the first pre-combustion chamber 13 as well. Both gases are mixed here, but at this time both gases are preheated to high temperatures, for example, the anode exhaust gas is preheated to about 625°C and the oxygen-containing gas is preheated to about 500°C, making it easy for hydrogen gas to ignite or burn. However, the first pre-combustion chamber 13 is made of fireproof/insulating material 1
9, so even if ignition or combustion occurs, it will not pose any danger. The mixed and pre-combusted gas (in some cases, no combustion occurs) is thoroughly mixed while passing through the plate-shaped mixing layer 7, and this mixed gas is left with residual hydrogen while passing through the catalyst layer 8. And carbon monoxide is completely combusted by oxygen and introduced into the second pre-combustion chamber 14. The combustion temperature in this first contact bed 9 is about 850 to 1000°C, and reaches a maximum of about 1050°C.
【００１３】ここで板状混合層７は、耐火性でアノード
排ガスと酸素含有ガスとを十分に混合できる構造のもの
であればその材質などは特に制限されないが、たとえば
、アルミナジルコニアなどの、空孔率約８５％、細孔容
積率約０．０３ｃｃ／ｇ程度の多孔質材を用いることが
できる。また板状またはハニカム状の触媒層８は、８０
０〜１０００℃程度で活性を示し１０５０℃程度までの
耐熱性を有するもの、たとえばアルミナジルコニアなど
の多孔性の担体にＰｄなどの金属触媒成分が粗粒の状態
で担持されたものなどが用いられる。The material of the plate-shaped mixed layer 7 is not particularly limited as long as it is fire-resistant and has a structure that allows sufficient mixing of the anode exhaust gas and the oxygen-containing gas. A porous material having a porosity of about 85% and a pore volume ratio of about 0.03 cc/g can be used. Further, the plate-shaped or honeycomb-shaped catalyst layer 8
A material that is active at a temperature of about 0 to 1000°C and has heat resistance up to about 1050°C is used, such as a material in which a metal catalyst component such as Pd is supported in the form of coarse particles on a porous support such as alumina zirconia. .
【００１４】次に、第２の予備燃焼室１４に導かれた燃
焼ガスには過剰の酸素ガスが含有されており、この酸素
ガスと第２のアノード排ガス導入口５から導かれたアノ
ード排ガスとが第２の予備燃焼室１４内で混合、部分燃
焼（場合によっては燃焼の起こらないこともある）した
のち、第２の接触床１２を経る間に十分混合、完全燃焼
されて、排出口６を経て燃焼ガスとして排出される。こ
の第２の接触床１２における燃焼温度は９５０〜１１７
０℃程度であり、最高１２００℃程度までである。この
ように複数の接触床を通じて燃焼させることによりアノ
ード排ガスを効率的に燃焼させることができる。Next, the combustion gas led to the second pre-combustion chamber 14 contains excess oxygen gas, and this oxygen gas and the anode exhaust gas led from the second anode exhaust gas inlet 5 are combined. After being mixed and partially combusted in the second pre-combustion chamber 14 (in some cases, no combustion may occur), they are thoroughly mixed and completely combusted while passing through the second contact bed 12, and are then discharged from the exhaust port 6. It is then discharged as combustion gas. The combustion temperature in this second contact bed 12 is 950-117
The temperature is about 0°C, and the maximum temperature is about 1200°C. By combusting the anode exhaust gas through a plurality of contact beds in this manner, the anode exhaust gas can be efficiently combusted.
【００１５】この第２の接触床１２において、板状混合
層１０には上記第１の接触床９において用いたものと同
様の構造および材質のものを用いることができる。また
板状またはハニカム状の触媒層１１としては、触媒活性
はほとんどないが１２００℃程度までの耐熱・耐酸化性
を有する高温蓄熱性の担体、たとえば、反応焼結型炭化
ケイ素などが用いられる。In the second contact bed 12, the plate-like mixed layer 10 may have the same structure and material as that used in the first contact bed 9. Further, as the plate-shaped or honeycomb-shaped catalyst layer 11, a high-temperature heat storage carrier having almost no catalytic activity but heat resistance and oxidation resistance up to about 1200° C., such as reaction-sintered silicon carbide, is used.
【００１６】排出口６からの排出ガスは、たとえば９５
０〜１２００℃程度の高温を有し、熱交換器型リフォー
マに導かれ、そこで熱源として利用された後、燃料電池
のカソードに供給される。The exhaust gas from the exhaust port 6 is, for example, 95
It has a high temperature of about 0 to 1200°C, and is led to a heat exchanger type reformer where it is used as a heat source and then supplied to the cathode of the fuel cell.
【００１７】本装置は、その内部が略筒形、好ましくは
略円筒形に形成され構造が簡単なため、起動、停止の操
作の繰り返しの多い場合においても熱衝撃によく耐え耐
久性に優れ、また触媒の交換等の保守も容易に行うこと
ができる。[0017] Since the inside of this device is formed into a substantially cylindrical shape, preferably a substantially cylindrical shape, and the structure is simple, it can withstand thermal shock well and has excellent durability even when starting and stopping operations are repeated frequently. Furthermore, maintenance such as replacing the catalyst can be easily performed.
【００１８】図１においては、２段式のものを示したが
、３段またはそれ以上のものとすることもできる。たと
えば、３段式とした場合、第１段目をスタートアップ時
用として用い、第２段目および第３段目を定常運転用と
して用いるのが好ましい。スタートアップ時には、燃料
ガスとして一般に天然ガスを使用するが、燃焼しにくい
ためその触媒層には高活性低温触媒を用いる必要がある
。たとえば４００〜５００℃程度で燃焼活性をもち最高
７５０〜８００℃程度の耐熱性をもつものが用いられ、
アノード排ガス燃焼用の触媒とはその使用条件が異なる
。そこで、第１段目の接触床はスタートアップ時用とし
て用い、スタートアップ完了後の定常運転時におけるア
ノード排ガスの燃焼を第２段目および第３段目の上記し
たような条件の接触床で行わせるような構成とすれば、
スタートアップおよび定常運転の両者の切り替えを円滑
に行うことができて便利である。In FIG. 1, a two-stage type is shown, but a three-stage or more type can also be used. For example, in the case of a three-stage system, it is preferable that the first stage is used for startup, and the second and third stages are used for steady operation. At startup, natural gas is generally used as the fuel gas, but because it is difficult to burn, it is necessary to use a highly active low-temperature catalyst in the catalyst layer. For example, those that have combustion activity at about 400 to 500 degrees Celsius and heat resistance up to about 750 to 800 degrees Celsius are used.
The usage conditions are different from the catalyst for anode exhaust gas combustion. Therefore, the first-stage contact bed is used for startup, and combustion of the anode exhaust gas during steady operation after completion of startup is performed in the second- and third-stage contact beds under the above-mentioned conditions. If you have a configuration like this,
This is convenient because it allows smooth switching between startup and steady operation.
【００１９】なお、図１の２段式のものにおいて、第１
段目をスタートアップ時用として用い、第２段目を定常
運転時のアノード排ガス燃焼用として用いるようにする
ことも可能である。Note that in the two-stage type shown in FIG.
It is also possible to use the first stage for startup and the second stage for anode exhaust gas combustion during steady operation.
【００２０】[0020]
【発明の効果】本発明の燃料電池のアノード排ガス燃焼
装置によれば、アノード排ガスと酸素含有ガスとの予備
燃焼室と、接触床とを燃焼装置本体内に設けかつこれを
複数段に設けたので、極めて安全に運転することができ
るとともにアノード排ガスの効率的でＮＯｘ発生量の低
い（最高１０ｐｐｍ）燃焼を行うことができる。また、
燃焼装置本体の内部構造を略筒形に形成するときは、上
記効果に加えてさらに耐久性に優れかつ保守も容易なも
のとすることができる。[Effects of the Invention] According to the anode exhaust gas combustion device for a fuel cell of the present invention, a preliminary combustion chamber for anode exhaust gas and oxygen-containing gas and a contact bed are provided in the combustion device main body, and these are provided in multiple stages. Therefore, it is possible to operate extremely safely and to perform efficient combustion of the anode exhaust gas with a low amount of NOx generation (maximum 10 ppm). Also,
When the internal structure of the combustion device main body is formed into a substantially cylindrical shape, in addition to the above effects, it can be made more durable and easier to maintain.
【図１】本発明の実施例による燃料電池のアノード排ガ
ス燃焼装置の断面図。FIG. 1 is a sectional view of a fuel cell anode exhaust gas combustion device according to an embodiment of the present invention.
１ アノード排ガス燃焼装置 ２ 燃焼装置本体 ３ 酸素含有ガス導入口 ４ 第１のアノード排ガス導入口 ５ 第２のアノード排ガス導入口 ６ 燃焼ガスの排出口 ７ 板状混合層 ８ 板状またはハニカム状触媒層 ９ 第１の接触床 １０ 板状混合層 １１ 板状またはハニカム状触媒層 １２ 第２の接触床 １３ 第１の予備燃焼室 １４ 第２の予備燃焼室 １９ 耐火・断熱材 1 Anode exhaust gas combustion device 2 Combustion device main body 3 Oxygen-containing gas inlet 4 First anode exhaust gas inlet 5 Second anode exhaust gas inlet 6 Combustion gas exhaust port 7 Plate-shaped mixed layer 8 Plate-shaped or honeycomb-shaped catalyst layer 9 First contact bed 10 Plate-shaped mixed layer 11 Plate-shaped or honeycomb-shaped catalyst layer 12 Second contact bed 13 First preliminary combustion chamber 14 Second preliminary combustion chamber 19 Fireproof/insulating materials
Claims (1)
ス導入口と燃焼ガスの排出口とを備えた燃料電池アノー
ド排ガスの燃焼装置において、該燃焼装置本体内に、（
イ）アノード排ガスと酸素含有ガスとの予備燃焼室、（
ロ）板状混合層とハニカム状または板状触媒層とからな
る接触床をそれぞれ複数段設け、前記酸素含有ガス導入
口が、最上流側の前記予備燃焼室に通ずるように設けら
れ、前記複数のアノード排ガス導入口のそれぞれが、複
数段設けられた前記予備燃焼室のそれぞれに通ずるよう
に設けられ、前記接触床に対して予備燃焼室が、および
前記触媒層に対して前記混合層がそれぞれ上流側に設置
されてなることを特徴とする燃料電池アノード排ガスの
燃焼装置。Claim 1: A fuel cell anode exhaust gas combustion device comprising an oxygen-containing gas inlet, a plurality of anode exhaust gas inlets, and a combustion gas exhaust port, wherein the combustion device main body includes (
b) Preliminary combustion chamber for anode exhaust gas and oxygen-containing gas, (
b) A plurality of contact beds each consisting of a plate-shaped mixed layer and a honeycomb-shaped or plate-shaped catalyst layer are provided, and the oxygen-containing gas inlet is provided so as to communicate with the preliminary combustion chamber on the most upstream side, and Each of the anode exhaust gas inlets is provided to communicate with each of the pre-combustion chambers provided in a plurality of stages, and the pre-combustion chamber is connected to the contact bed, and the mixed layer is connected to the catalyst layer, respectively. A combustion device for fuel cell anode exhaust gas, characterized in that it is installed on the upstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3018975A JP2501666B2 (en) | 1991-02-12 | 1991-02-12 | Fuel cell anode exhaust gas combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3018975A JP2501666B2 (en) | 1991-02-12 | 1991-02-12 | Fuel cell anode exhaust gas combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04257610A true JPH04257610A (en) | 1992-09-11 |
| JP2501666B2 JP2501666B2 (en) | 1996-05-29 |
Family
ID=11986639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3018975A Expired - Fee Related JP2501666B2 (en) | 1991-02-12 | 1991-02-12 | Fuel cell anode exhaust gas combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501666B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005116467A (en) * | 2003-10-10 | 2005-04-28 | Nissan Motor Co Ltd | Emission system for fuel cell |
| JP2013235767A (en) * | 2012-05-10 | 2013-11-21 | Miura Co Ltd | Fuel cell system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT508488A1 (en) * | 2009-07-13 | 2011-01-15 | Vaillant Group Austria Gmbh | AFTERBREAKER FOR NATURAL GAS-BASED FUEL CELL HEATERS |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065472A (en) * | 1983-09-20 | 1985-04-15 | Babcock Hitachi Kk | Fuel cell device |
| JPH02262263A (en) * | 1989-03-31 | 1990-10-25 | Ishikawajima Harima Heavy Ind Co Ltd | Multi-stage combustion type catalyst combustor |
-
1991
- 1991-02-12 JP JP3018975A patent/JP2501666B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065472A (en) * | 1983-09-20 | 1985-04-15 | Babcock Hitachi Kk | Fuel cell device |
| JPH02262263A (en) * | 1989-03-31 | 1990-10-25 | Ishikawajima Harima Heavy Ind Co Ltd | Multi-stage combustion type catalyst combustor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005116467A (en) * | 2003-10-10 | 2005-04-28 | Nissan Motor Co Ltd | Emission system for fuel cell |
| JP4584564B2 (en) * | 2003-10-10 | 2010-11-24 | 日産自動車株式会社 | Fuel cell exhaust system |
| JP2013235767A (en) * | 2012-05-10 | 2013-11-21 | Miura Co Ltd | Fuel cell system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2501666B2 (en) | 1996-05-29 |
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