JP2002097001A - Fuel gas reformer and fuel-cell system - Google Patents
Fuel gas reformer and fuel-cell systemInfo
- Publication number
- JP2002097001A JP2002097001A JP2000291070A JP2000291070A JP2002097001A JP 2002097001 A JP2002097001 A JP 2002097001A JP 2000291070 A JP2000291070 A JP 2000291070A JP 2000291070 A JP2000291070 A JP 2000291070A JP 2002097001 A JP2002097001 A JP 2002097001A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- water
- desulfurizer
- fuel
- reformer
- 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
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
- Hydrogen, Water And Hydrids (AREA)
- Industrial Gases (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炭化水素系燃料ガ
スを改質し、水素リッチなガスを得る燃料ガス改質装置
に係り、水添脱硫器入り口への改質ガス戻りライン中に
水分除去手段を設け、改質ガス中の水分を除去すること
で脱硫触媒の性能維持及び長寿命化を図った燃料改質装
置及び燃料電池システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel gas reformer for reforming a hydrocarbon fuel gas to obtain a hydrogen-rich gas. The present invention relates to a fuel reforming apparatus and a fuel cell system that are provided with a removing unit and remove water in a reformed gas to maintain the performance of a desulfurization catalyst and extend the life thereof.
【０００２】[0002]
【従来の技術】従来の燃料電池システムにおいては、例
えば図３のように都市ガスやプロパンガス等の炭化水素
系燃料ガスに含まれる硫黄分を除去する脱硫器１と、こ
の脱硫器１により硫黄分が除去された燃料ガスを水素リ
ッチなガスに改質する改質器２と、この改質器２で改質
された改質ガス中に含まれる一酸化炭素を低減するＣＯ
変成器３と、更にＣＯ変成器３で変成された改質ガス中
の一酸化炭素を選択酸化して除去するＣＯ除去器４とか
ら燃料ガス改質装置が構成されている。2. Description of the Related Art In a conventional fuel cell system, for example, as shown in FIG. 3, a desulfurizer 1 for removing sulfur contained in a hydrocarbon-based fuel gas such as a city gas or a propane gas, and the desulfurizer 1 Reformer 2 for reforming the fuel gas from which the fuel gas has been removed into a hydrogen-rich gas, and CO for reducing carbon monoxide contained in the reformed gas reformed by the reformer 2.
The fuel gas reforming apparatus includes the shift converter 3 and a CO remover 4 that selectively oxidizes and removes carbon monoxide in the reformed gas converted in the CO shift converter 3.
【０００３】前記脱硫器１で硫黄分を除去するのは、都
市ガスやプロパンガス等には付臭剤として有機硫黄分
（通常都市ガス中には２〜３ｐｐｍ）が添加されてお
り、この有機硫黄分が改質器２の触媒に付着すると、硫
黄被毒のために改質器２の改質性能が低減するためであ
る。又、前記ＣＯ変成器３及びＣＯ除去器４で改質ガス
中の一酸化炭素を減少・除去するのは、燃料電池５の電
極触媒が一酸化炭素により被毒されて発電能力が低下す
るためである。[0003] The sulfur content is removed by the desulfurizer 1 because an organic sulfur content (usually 2-3 ppm in city gas) is added to city gas or propane gas as an odorant. This is because if the sulfur component adheres to the catalyst of the reformer 2, the reforming performance of the reformer 2 is reduced due to sulfur poisoning. Also, the reason why the CO converter 3 and the CO remover 4 reduce and remove the carbon monoxide in the reformed gas is that the electrode catalyst of the fuel cell 5 is poisoned by the carbon monoxide and the power generation capacity is reduced. It is.
【０００４】脱硫器１に用いられる脱硫触媒は、例えば
燃料ガスに水素を加えて有機硫黄化合物を硫化水素に分
解する水添脱硫触媒と、発生した硫化水素や未分解の有
機硫黄化合物を吸着する吸着触媒とにより構成されてい
る。又はこのような機能を備えた１種類の触媒によって
構成される場合もある。The desulfurization catalyst used in the desulfurizer 1 is, for example, a hydrodesulfurization catalyst for decomposing organic sulfur compounds into hydrogen sulfide by adding hydrogen to fuel gas, and adsorbing generated hydrogen sulfide and undecomposed organic sulfur compounds. It consists of an adsorption catalyst. Alternatively, it may be constituted by one kind of catalyst having such a function.
【０００５】[0005]
【発明が解決しようとする課題】上記脱硫器１内の水添
脱硫反応及び吸着反応には、触媒の耐熱性や活性の面で
好適な温度範囲が存在する。このため、図３のように通
常脱硫器１に供給される燃料ガスは、改質器２の下流で
分岐された戻りライン６を介して戻される水素リッチの
リサイクルガスと合流した後に脱硫器１に供給される。
しかしながら、戻りライン６を介して戻されるリサイク
ルガス中には多くの水分（水蒸気）が含まれており、こ
の水分が戻りライン６の配管内で凝縮すると配管詰まり
を起こし、脱硫器１の触媒に付着すると触媒の温度を下
げて脱硫性能を低下させ、又は吸着剤の孔を塞いで吸着
性能を低下させる等の不具合が発生する。The hydrodesulfurization reaction and the adsorption reaction in the desulfurizer 1 have a suitable temperature range in terms of heat resistance and activity of the catalyst. Therefore, as shown in FIG. 3, the fuel gas normally supplied to the desulfurizer 1 is combined with the hydrogen-rich recycle gas returned via the return line 6 branched downstream of the reformer 2, and then the desulfurizer 1 Supplied to
However, a large amount of water (steam) is contained in the recycle gas returned through the return line 6, and if this water condenses in the pipe of the return line 6, clogging of the pipe occurs and the catalyst of the desulfurizer 1 If adhered, a problem such as lowering the temperature of the catalyst to lower the desulfurization performance or blocking the pores of the adsorbent to lower the adsorption performance occurs.
【０００６】そこで、本発明は、脱硫器１へ戻す改質ガ
ス中の水分を除去することにより、上記従来の不具合を
解消できるようにした燃料ガス改質装置及び燃料電池シ
ステムを提供することを目的とする。Accordingly, the present invention provides a fuel gas reformer and a fuel cell system which can eliminate the above-mentioned conventional problems by removing moisture in the reformed gas returned to the desulfurizer 1. Aim.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めの具体的手段として、本発明は、水添脱硫触媒を充填
した脱硫器と、炭化水素系燃料を改質して得た改質ガス
の一部を前記脱硫器の入口に戻すラインとを備えた燃料
ガス改質装置において、前記改質ガスの一部の戻りライ
ン中に、改質ガス中の水分を除去する水分除去手段を設
けた燃料ガス改質装置を要旨とする。又、この燃料ガス
改質装置において、前記水分除去手段が熱交換器である
こと、前記熱交換器の冷却媒体として改質用水を用いる
こと、を特徴とするものである。更に、このような燃料
ガス改質装置を含む燃料電池システムを要旨とする。As a specific means for achieving the above object, the present invention relates to a desulfurizer filled with a hydrodesulfurization catalyst, and a reformer obtained by reforming a hydrocarbon fuel. A fuel gas reformer having a line for returning a part of the gas to the inlet of the desulfurizer, wherein a moisture removing means for removing moisture in the reformed gas is provided in a return line for a part of the reformed gas. The gist is the provided fuel gas reformer. Further, in this fuel gas reforming apparatus, the moisture removing means is a heat exchanger, and reforming water is used as a cooling medium of the heat exchanger. Further, a gist is a fuel cell system including such a fuel gas reformer.
【０００８】本発明では、脱硫器へ戻す改質ガス中の水
分を除去することから、戻りラインの配管内で凝縮して
配管詰まりを生じることがなく、又脱硫触媒に付着して
脱硫性能及び吸着性能の低下を来たすことがなくなる。[0008] In the present invention, since the moisture in the reformed gas returned to the desulfurizer is removed, it does not condense in the return line piping to cause clogging of the piping, and adheres to the desulfurization catalyst to improve the desulfurization performance and performance. Adsorption performance is not reduced.
【０００９】[0009]
【発明の実施の形態】次に、本発明に係る実施形態を添
付図面に基づいて（従来例に相当する部材は同一符号
で）説明する。図１は、本発明の一実施形態を示す構成
図であり、都市ガス等の燃料ガスを水素リッチなガスに
改質する改質装置は、脱硫器１と改質器２とＣＯ変成器
３とＣＯ除去器４とから構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to the accompanying drawings (members corresponding to conventional examples are denoted by the same reference numerals). FIG. 1 is a configuration diagram showing one embodiment of the present invention. A reformer for reforming a fuel gas such as a city gas into a hydrogen-rich gas includes a desulfurizer 1, a reformer 2, and a CO shift converter 3. And a CO remover 4.
【００１０】６は水素リッチなガスの一部をリサイクル
ガスとして脱硫器１に戻すための戻りラインであり、Ｃ
Ｏ変成器３の上流側即ち改質器２とＣＯ変成器３との間
であって、熱交換器７の出口側に接続して分岐し、前記
脱硫器１の入口側に導入するように設けられている。８
は戻りライン６の途中の要所に配設された水分除去手段
であり、この場合は熱交換器が用いられている。Reference numeral 6 denotes a return line for returning a part of the hydrogen-rich gas to the desulfurizer 1 as a recycled gas.
An upstream side of the O shift converter 3, that is, between the reformer 2 and the CO shift converter 3, connected to an outlet side of the heat exchanger 7, branched, and introduced to the inlet side of the desulfurizer 1. Is provided. 8
Is a moisture removing means disposed at a key point in the middle of the return line 6, and in this case, a heat exchanger is used.
【００１１】都市ガス等の燃料ガスは、前記戻りライン
６を介して戻されるリサイクルガスと合流して脱硫器１
に供給される。脱硫器１は水添脱硫方式であって、供給
された燃料ガスと、通常その燃料ガスの１０ｖｏｌ％の
量のＨ２ガスを含むリサイクルガスとの合流ガスを脱硫
する。水添脱硫触媒としてはＣｏ−Ｍｏ系やＮｉ−Ｍｏ
系が用いられ、吸着剤としては酸化亜鉛系触媒が用いら
れ、この水添・吸着脱硫反応（ＲＣＨ２ＳＨ＋Ｈ２→Ｒ
ＣＨ３＋Ｈ２Ｓ ＺｎＯ＋Ｈ２Ｓ→ＺｎＳ＋Ｈ ２Ｏ）に
よって２０〜５０ｐｐｂ程度に脱硫することが可能であ
る。又、有機硫黄のうちＲＳＨやＣＯＳは、条件によっ
ては酸化亜鉛系触媒でも吸着されるが、一般にはＣｏ−
Ｍｏ或はＮｉ−Ｍｏ系の水添触媒上で一旦Ｈ２Ｓに添加
した後にＺｎＯで吸着されるのが普通である。脱硫器１
での脱硫反応温度は３５０℃〜４００℃である。Fuel gas such as city gas is supplied to the return line.
Merging with the recycle gas returned through the desulfurizer 6
Supplied to The desulfurizer 1 is of a hydrodesulfurization type,
Fuel gas and 10 vol% of the fuel gas
Quantity of H2Desulfurization of combined gas with recycle gas including gas
I do. Examples of the hydrodesulfurization catalyst include Co-Mo type and Ni-Mo.
System, and a zinc oxide catalyst is used as the adsorbent.
This hydrogenation / adsorption desulfurization reaction (RCH2SH + H2→ R
CH3+ H2S ZnO + H2S → ZnS + H 2O)
Therefore, it is possible to desulfurize to about 20 to 50 ppb.
You. In addition, among organic sulfur, RSH and COS depend on conditions.
Although it is also adsorbed by a zinc oxide-based catalyst, it is generally Co-
Once H is applied on Mo or Ni-Mo based hydrogenation catalyst2Add to S
After doing ZnIt is usually adsorbed with O. Desulfurizer 1
At 350 ° C to 400 ° C.
【００１２】前記改質器２で改質された改質ガスの１０
％程度がリサイクルガスとして戻されるが、そのリサイ
クルガス中には水分（水蒸気）が約３０〜４０ｖｏｌ％
含まれており、これが戻りライン６の配管内で凝縮する
と配管詰まりが生じ、脱硫器１内に流入すると脱硫性能
を阻害する。本発明では、前記のように戻りライン６の
途中に熱交換器からなる水分除去手段８を設けてあるた
め、この水分除去手段８によってリサイクルガス中の水
分が除去され、ドレンとして排出される。従って、リサ
イクルガス中の水分に起因する上記弊害を防止すること
ができる。The reformed gas 10 reformed in the reformer 2
% Is returned as a recycled gas, and the recycled gas contains about 30 to 40% by volume of water (steam).
If it is condensed in the pipe of the return line 6, the pipe will be clogged, and if it flows into the desulfurizer 1, the desulfurization performance will be impaired. In the present invention, since the water removing means 8 including a heat exchanger is provided in the middle of the return line 6 as described above, the water in the recycled gas is removed by the water removing means 8 and discharged as drain. Therefore, the above-mentioned adverse effects caused by the moisture in the recycled gas can be prevented.
【００１３】この場合、水分除去手段８である熱交換器
の冷媒としては改質用水が用いられる。即ち、水タンク
９の水を配水路１０を介して水分除去手段８に導いて冷
媒として使用し、更にその水を改質器２に供給して改質
用水として使用する。従来においては、図３のように水
タンク９の水をそのまま改質器２に導入し、改質器２の
バーナ２ａにより加熱して水蒸気に変えていた。本発明
の場合には、水分除去手段８での熱交換により熱せられ
た改質用水を改質器２に導入するため、改質器２のバー
ナ２ａで速やかに水蒸気に変えることができる。従っ
て、従来に比してバーナ２ａの加熱量は少なくて済み、
極めて効率的である。これにより、省エネが可能となっ
て経済的である。In this case, reforming water is used as a refrigerant of the heat exchanger which is the water removing means 8. That is, the water in the water tank 9 is guided to the water removing means 8 through the water distribution passage 10 and used as a refrigerant, and the water is supplied to the reformer 2 and used as reforming water. Conventionally, as shown in FIG. 3, the water in the water tank 9 is directly introduced into the reformer 2, and is heated by the burner 2a of the reformer 2 to be converted into steam. In the case of the present invention, since the reforming water heated by the heat exchange in the moisture removing means 8 is introduced into the reformer 2, it can be quickly changed to steam by the burner 2a of the reformer 2. Therefore, the amount of heating of the burner 2a may be smaller than in the conventional case,
Extremely efficient. This enables energy saving and is economical.
【００１４】前記脱硫器１で脱硫された燃料ガスは、従
来と同様に改質器２で水蒸気改質された後にＣＯ変成器
３に送り込まれ、改質ガス中の一酸化炭素が二酸化炭素
に変成される。この時、前記のようにＣＯ変成器３に送
り込まれる改質ガスの一部が、リサイクルガスとして戻
りライン６により脱硫器１の入口側に戻される。The fuel gas desulfurized in the desulfurizer 1 is steam-reformed in a reformer 2 as in the prior art, and then sent to a CO shift converter 3, where carbon monoxide in the reformed gas is converted into carbon dioxide. Metamorphosis. At this time, a part of the reformed gas sent to the CO shift converter 3 as described above is returned to the inlet side of the desulfurizer 1 through the return line 6 as a recycled gas.
【００１５】ＣＯ変成器３でＣＯ濃度が１％以下に変成
された改質ガスは、ＣＯ除去器４に送り込まれ、エアポ
ンプ１１により取り込まれた空気が供給されて選択酸化
され、ＣＯ濃度が１０ｐｐｍ以下に調整される。The reformed gas whose CO concentration has been reduced to 1% or less in the CO converter 3 is sent to a CO remover 4 and air taken in by an air pump 11 is supplied to be selectively oxidized, so that the CO concentration is 10 ppm. It is adjusted as follows.
【００１６】この改質ガスは燃料電池５の燃料極に供給
され、燃料電池５の空気極にはエアポンプ１２により取
り込まれると共に、加湿器１３で加湿された空気が供給
され、この空気中の酸素ガスと改質ガス中の水素ガスと
がイオン交換膜（例えば固体高分子電解質膜）を介して
化学反応して起電力を生じ、同時に水が生成される。こ
の燃料電池５の運転時に、前記水タンク９から水ポンプ
１４を介して燃料電池５に冷却用水が供給され、燃料電
池５を冷却した後に水タンク９に戻される。水タンク９
には、純水装置１５を介して純水化された市水が適宜補
充される。又、空気極での未反応の空気は系外に排出さ
れ、燃料極での未反応改質ガスは前記改質器２のバーナ
２ａに送り込まれて燃焼される。The reformed gas is supplied to the fuel electrode of the fuel cell 5, and the air electrode of the fuel cell 5 is taken in by the air pump 12 and supplied with the air humidified by the humidifier 13, so that the oxygen in the air is supplied. The gas and the hydrogen gas in the reformed gas undergo a chemical reaction via an ion exchange membrane (for example, a solid polymer electrolyte membrane) to generate an electromotive force and, at the same time, generate water. During operation of the fuel cell 5, cooling water is supplied from the water tank 9 to the fuel cell 5 via the water pump 14, and after cooling the fuel cell 5, the fuel cell 5 is returned to the water tank 9. Water tank 9
, City water purified via the pure water device 15 is appropriately replenished. Unreacted air at the air electrode is discharged out of the system, and unreacted reformed gas at the fuel electrode is sent to the burner 2a of the reformer 2 and burned.
【００１７】図２は、本発明の他の実施形態を示す構成
図であり、基本的構成は上記の実施形態と同じであり、
都市ガス等の燃料ガスを水素リッチなガスに改質する改
質装置は、脱硫器１と改質器２とＣＯ変成器３とＣＯ除
去器４とから構成されている。この場合、戻りライン６
が、ＣＯ変成器３の下流側に設けられている点で上記の
実施形態と相違している。FIG. 2 is a configuration diagram showing another embodiment of the present invention. The basic configuration is the same as that of the above embodiment.
The reformer for reforming fuel gas such as city gas into a hydrogen-rich gas includes a desulfurizer 1, a reformer 2, a CO shift converter 3, and a CO remover 4. In this case, return line 6
However, this is different from the above-described embodiment in that it is provided on the downstream side of the CO transformer 3.
【００１８】即ち、戻りライン６はＣＯ変成器３の出口
側に接続されて分岐し、ＣＯ変成器３で変成された改質
ガスの一部をリサイクルガスとして脱硫器１の入口側に
戻すようにしてある。この戻りライン６の途中要所に
は、前記と同様に熱交換器からなる水分除去手段８が設
けられ、この水分除去手段８には冷媒として水タンク９
から改質用水が導入され、水分除去手段８を通過した後
に改質器２の入口側に供給される。戻りライン６により
戻されるリサイクルガスは、燃料ガスと合流して脱硫器
１に供給される。That is, the return line 6 is connected to the outlet side of the CO converter 3 and branches so that a part of the reformed gas converted in the CO converter 3 is returned to the inlet side of the desulfurizer 1 as recycle gas. It is. In the middle of the return line 6, a water removing means 8 comprising a heat exchanger is provided as described above, and the water removing means 8 has a water tank 9 as a refrigerant.
Is passed through the water removing means 8 and supplied to the inlet side of the reformer 2. The recycle gas returned by the return line 6 is combined with the fuel gas and supplied to the desulfurizer 1.
【００１９】この場合も、リサイクルガス中に含まれる
水分（水蒸気）が水分除去手段８で冷媒により凝縮され
ドレンとして排出されるため、戻りライン６の配管内で
凝縮することはなく、配管詰まりを未然に防止すると共
に、脱硫器１内に流入しないため脱硫機能を阻害するこ
とがない。従って、脱硫器１での脱硫性能及び吸着性能
の低下を未然に防止することができる。In this case as well, the water (water vapor) contained in the recycled gas is condensed by the refrigerant in the water removing means 8 and discharged as drain, so that it is not condensed in the pipe of the return line 6 and the pipe is clogged. This prevents the desulfurization function and prevents the desulfurization function from being impeded because it does not flow into the desulfurizer 1. Therefore, it is possible to prevent the desulfurization performance and the adsorption performance in the desulfurizer 1 from being lowered.
【００２０】又、水分除去手段８で熱交換された高温の
改質用水が改質器２の入口側に導入されることから、こ
れを水蒸気にするための改質器２のバーナ２ａの熱量が
少なくて済み、且つ速やかに蒸気化することから改質器
２での水蒸気改質を効率良く行うことができる。Further, since the high-temperature reforming water heat-exchanged by the water removing means 8 is introduced into the inlet side of the reformer 2, the calorie of the burner 2a of the reformer 2 for converting it into steam is formed. Therefore, steam reforming in the reformer 2 can be performed efficiently because the amount of steam is reduced and the steam is quickly vaporized.
【００２１】脱硫器１、改質器２、ＣＯ変成器３及びＣ
Ｏ除去器４を経て改質された水素リッチなガスは、前記
と同様に燃料電池５の燃料極に供給され、燃料電池５の
空気極にはエアポンプ１２により取り込まれると共に、
加湿器１３で加湿された空気が供給され、この空気中の
酸素ガスと改質ガス中の水素ガスとがイオン交換膜（例
えば固体高分子電解質膜）を介して化学反応して起電力
を生じ、同時に水が生成される。燃料電池５の運転時に
は、前記水タンク９から水ポンプ１４を介して燃料電池
５に冷却用水が供給され、燃料電池５を冷却した後に水
タンク９に戻される。水タンク９には、純水装置１５を
介して市水が純水化されて適宜補充される。又、空気極
での未反応の空気は系外に排出され、燃料極での未反応
改質ガスは前記改質器２のバーナ２ａに送り込まれて燃
焼される。A desulfurizer 1, a reformer 2, a CO converter 3 and C
The hydrogen-rich gas reformed through the O remover 4 is supplied to the fuel electrode of the fuel cell 5 in the same manner as described above, and is taken into the air electrode of the fuel cell 5 by the air pump 12.
Air humidified by the humidifier 13 is supplied, and oxygen gas in the air and hydrogen gas in the reformed gas undergo a chemical reaction via an ion exchange membrane (for example, a solid polymer electrolyte membrane) to generate an electromotive force. At the same time, water is produced. During operation of the fuel cell 5, cooling water is supplied from the water tank 9 to the fuel cell 5 via the water pump 14, and after cooling the fuel cell 5, the cooling water is returned to the water tank 9. City water is purified into the water tank 9 via a pure water device 15 and is appropriately replenished. Unreacted air at the air electrode is discharged out of the system, and unreacted reformed gas at the fuel electrode is sent to the burner 2a of the reformer 2 and burned.
【００２２】[0022]
【発明の効果】以上説明したように、本発明は、燃料電
池システムの燃料ガス改質装置において、炭化水素系燃
料ガスを改質して得たガスの一部を、リサイクルガスと
して水添脱硫触媒を充填した脱硫器の入口に戻す場合、
その戻りラインの要所に改質ガス中に含まれる水分（水
蒸気）を除去する水分除去手段を設けたので、戻りライ
ンの配管内で凝縮して配管詰まりが生じることはなく、
又脱硫器内の触媒に付着して脱硫性能及び吸着性能を阻
害することもなく、長寿命化が図れる。更に、水分除去
手段の熱交換器の冷媒として改質用水を使用するので、
別途に冷媒を用意する必要がなく、構成を簡素なものと
することができると共に経済的である。この改質用水
は、熱交換器で加熱されるため改質器に供給する際に蒸
気化するための改質器のバーナの加熱量を減らすことが
でき、これにより省エネが図れて経済的である。As described above, according to the present invention, in a fuel gas reformer for a fuel cell system, a part of a gas obtained by reforming a hydrocarbon fuel gas is hydrodesulfurized as a recycle gas. When returning to the inlet of the desulfurizer filled with catalyst,
Since a moisture removing means for removing moisture (steam) contained in the reformed gas is provided at a key point in the return line, there is no condensation in the return line piping and clogging of the piping.
In addition, the service life can be extended without adhering to the catalyst in the desulfurizer and hindering the desulfurization performance and adsorption performance. Furthermore, since the reforming water is used as the refrigerant of the heat exchanger of the moisture removing means,
There is no need to separately prepare a refrigerant, so that the configuration can be simplified and it is economical. Since the reforming water is heated by the heat exchanger, the amount of heating of the burner of the reformer to be vaporized when supplied to the reformer can be reduced, thereby conserving energy and achieving economical efficiency. is there.
【図１】本発明に係る燃料ガス改質装置を含む燃料電池
システムの一実施形態を示す構成図FIG. 1 is a configuration diagram showing one embodiment of a fuel cell system including a fuel gas reformer according to the present invention.
【図２】本発明に係る燃料ガス改質装置を含む燃料電池
システムの他の実施形態を示す構成図FIG. 2 is a configuration diagram showing another embodiment of the fuel cell system including the fuel gas reformer according to the present invention.
【図３】従来の燃料電池システムを示す構成図FIG. 3 is a configuration diagram showing a conventional fuel cell system.
１…脱硫器 ２…改質器 ３…ＣＯ変成器 ４…ＣＯ除去器 ５…燃料電池 ６…戻りライン ７…熱交換器 ８…水分除去手段 ９…水タンク １０…配水路 １１，１２…エアポンプ １３…加湿器 １４…水ポンプ １５…純水装置 DESCRIPTION OF SYMBOLS 1 ... Desulfurizer 2 ... Reformer 3 ... CO shift converter 4 ... CO remover 5 ... Fuel cell 6 ... Return line 7 ... Heat exchanger 8 ... Moisture removal means 9 ... Water tank 10 ... Water distribution channel 11, 12 ... Air pump 13: Humidifier 14: Water pump 15: Pure water device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｍ 8/06 Ｃ１０Ｌ 3/00 Ｂ (72)発明者 小田 勝也 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 門脇 正天 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 宮井 恵吾 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 黄木 丈俊 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 田島 収 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 4G040 EA03 EA06 EB01 EB31 EB32 EB35 4G140 EA03 EA06 EB01 EB31 EB32 EB39 4H060 AA02 BB08 BB24 CC01 DD05 FF07 GG02 5H027 AA06 BA05 BA06 BA09 BA16 BA17 CC06 MM12 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01M 8/06 C10L 3/00 B (72) Inventor Katsuya Oda 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Masaten Kadowaki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka 2-5 Sanyo Electric Co., Ltd. (72) Keigo Miyai 2 Keihanhondori, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. (72) Inventor Taketoshi Koki 2-5-5 Sanyo Electric Co., Ltd. in Sanyo Electric Co., Ltd. (72) Inventor Osamu Tajima Keihan Moriguchi, Osaka 2-5-5 Hondori Sanyo Electric Co., Ltd. F-term (reference) 4G040 EA03 EA06 EB01 EB31 EB32 EB35 4G140 EA03 EA06 EB01 EB31 EB32 EB39 4H060 AA02 BB08 BB24 CC01 DD05 FF07 GG02 5H027 AA09 BA05 BA06 BA06 BA16 BA17 CC06 MM12
Claims (4)
素系燃料を改質して得た改質ガスの一部を前記脱硫器の
入口に戻すラインとを備えた燃料ガス改質装置におい
て、前記改質ガスの一部の戻りライン中に、改質ガス中
の水分を除去する水分除去手段を設けたことを特徴とす
る燃料ガス改質装置。1. A fuel gas reformer comprising: a desulfurizer filled with a hydrodesulfurization catalyst; and a line for returning a part of a reformed gas obtained by reforming a hydrocarbon-based fuel to an inlet of the desulfurizer. A fuel gas reforming apparatus, characterized in that a moisture removing means for removing moisture in the reformed gas is provided in a part of the return line of the reformed gas.
１記載の燃料ガス改質装置。2. The fuel gas reformer according to claim 1, wherein said moisture removing means is a heat exchanger.
用いる請求項２記載の燃料ガス改質装置。3. The fuel gas reformer according to claim 2, wherein reforming water is used as a cooling medium for the heat exchanger.
質装置を含む燃料電池システム。4. A fuel cell system comprising the fuel gas reformer according to claim 1.
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|---|---|---|---|
| JP2000291070A JP4036607B2 (en) | 2000-09-25 | 2000-09-25 | Fuel gas reformer and fuel cell system |
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|---|---|---|---|
| JP2000291070A JP4036607B2 (en) | 2000-09-25 | 2000-09-25 | Fuel gas reformer and fuel cell system |
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| JP2002097001A true JP2002097001A (en) | 2002-04-02 |
| JP4036607B2 JP4036607B2 (en) | 2008-01-23 |
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