JPH0831443A - Water recording device for fuel cell power generation device - Google Patents

Water recording device for fuel cell power generation device

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Publication number
JPH0831443A
JPH0831443A JP6165685A JP16568594A JPH0831443A JP H0831443 A JPH0831443 A JP H0831443A JP 6165685 A JP6165685 A JP 6165685A JP 16568594 A JP16568594 A JP 16568594A JP H0831443 A JPH0831443 A JP H0831443A
Authority
JP
Japan
Prior art keywords
water
tower
gas
recovered
air
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
JP6165685A
Other languages
Japanese (ja)
Other versions
JP3132627B2 (en
Inventor
Takashi Ouchi
崇 大内
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP06165685A priority Critical patent/JP3132627B2/en
Publication of JPH0831443A publication Critical patent/JPH0831443A/en
Application granted granted Critical
Publication of JP3132627B2 publication Critical patent/JP3132627B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

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  • Fuel Cell (AREA)

Abstract

PURPOSE:To restrict carbon dioxide gas concentration of decarbonated water to be low, and elongate a regeneration cycle of ion exchange resin by holding recovered water in a water tank under a decarbonater to be constantly at a higher position than a water level of recovered water in a water tank under a water recovering tower. CONSTITUTION:A water level of recovered water 6B stored in a water tank 15B is held to be higher than a water level of recovered water 6 stored in a water tank 15A. Part of the decarbonated water 6B is supplied through a throttle 16 to the water tank 15A to be sent to a liquid-to-liquid cooler 21 with condensed water 6A to be recovered water to be cooled. Carbon dioxide gas in combustion waste gas 2G introduced from a combustion waste gas supply port 18 of a water recovering tower 11 is thus diluted by a mass quantity of the recovered water. Carbon dioxide gas concentration in the decarbonated water 6B to be supplied to an ion exchange type water processing device 8 is thus restricted to be low, thereby a regeneration cycle of ion exchange resin can be elongated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、燃料改質器を含む燃
料電池発電装置の排気中の水分を回収して水処理装置に
供給する水回収装置、ことに燃焼排ガスから回収された
回収水中の炭酸ガス濃度を低減する機能を備えた水回収
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water recovery device for recovering moisture in exhaust gas of a fuel cell power generator including a fuel reformer and supplying it to a water treatment device, and in particular, recovered water recovered from combustion exhaust gas. The present invention relates to a water recovery device having a function of reducing the carbon dioxide concentration.

【０００２】[0002]

【従来の技術】電解液にリン酸を用いたリン酸形燃料電
池は、メタンガス等の原燃料を水蒸気改質して得られた
燃料ガス中の水素と空気中の酸素とを、燃料電池の燃料
電極および空気電極にそれぞれ供給し、電気化学反応に
基づいて発電するものである。原燃料の燃料ガスへの改
質には、原燃料としてのメタンに水蒸気を加えて水とメ
タンとの反応を触媒で促進して行う燃料改質器が用いら
れる。したがって、燃料改質器には燃料の改質に使用し
た水蒸気量に対応して水を補給する必要がある。この水
にはイオン交換式水処理装置等で不純物を除去したイオ
ン交換水が用いられるが、燃料電池の電気化学反応で生
じた発電生成水や燃料改質基板バーナの燃焼排ガス中の
水分（燃焼生成水）を凝縮した回収水を用いた方が水道
水よりも不純物が少なく、その分イオン交換式水処理装
置の負荷を軽くできるので、通常、燃料電池発電装置に
水回収装置を付加して排気中の水分を回収する方策が採
られている。2. Description of the Related Art A phosphoric acid fuel cell using phosphoric acid as an electrolytic solution is a fuel cell for converting hydrogen in fuel gas and oxygen in air obtained by steam reforming a raw fuel such as methane gas into a fuel cell. It is supplied to the fuel electrode and the air electrode, respectively, and generates electric power based on an electrochemical reaction. A fuel reformer is used for reforming a raw fuel into a fuel gas by adding steam to methane as a raw fuel to promote a reaction between water and methane with a catalyst. Therefore, it is necessary to replenish the fuel reformer with water according to the amount of steam used for reforming the fuel. As this water, ion-exchanged water from which impurities have been removed by an ion-exchange water treatment device is used. It is possible to reduce the load on the ion-exchange water treatment equipment by using the recovered water that has condensed generated water) as compared with tap water. Therefore, usually add a water recovery device to the fuel cell power generator. Measures have been taken to collect water in the exhaust.

【０００３】図３は、燃料電池発電装置における従来の
補給水の回収および処理系を示す構成図である。図にお
いて燃料電池本体１は模式的に図示されており、リン酸
を保持するマトリックスを挟んで燃料電極および空気電
極を配した単位セルの積層体から構成されている。燃料
電極に燃料改質器２で生成した燃料ガスを供給し、空気
電極に空気を供給することにより、電気化学反応に基づ
いて発電が行われる。燃料電極からのオフガスは燃料改
質バーナ２Ｂに送られ、残存する水素が燃焼し、その燃
焼熱が燃料改質反応の反応熱として利用される。水素の
燃焼により生じた水（燃焼生成水）を含む燃焼排ガス２
Ｇ、および発電によって生じた水（発電生成水）を含む
空気オフガス１Ａは、水回収装置３に送られ水分が回収
される。水回収装置３は、例えば水分回収塔４に水冷式
の熱交換器５を収納した構造であり、熱交換器５により
凝縮した水は水分回収塔４の底部に回収水６として貯留
される。回収水６はポンプ７Ａでイオン交換式水処理装
置８に送られ、不純物が除去された補給水１０として水
タンク９に蓄積され、必要に応じてポンプ７Ｃにより燃
料改質器２に送られて、原燃料に高温の水蒸気として添
加され、原燃料の水蒸気改質に必要な反応水として利用
される。FIG. 3 is a block diagram showing a conventional makeup and recovery system of makeup water in a fuel cell power generator. In the figure, the fuel cell body 1 is schematically illustrated, and is composed of a stack of unit cells in which a fuel electrode and an air electrode are arranged with a matrix holding phosphoric acid interposed therebetween. By supplying the fuel gas generated by the fuel reformer 2 to the fuel electrode and supplying the air to the air electrode, power is generated based on the electrochemical reaction. The off gas from the fuel electrode is sent to the fuel reforming burner 2B, the remaining hydrogen burns, and the combustion heat is used as the reaction heat of the fuel reforming reaction. Combustion exhaust gas 2 containing water generated by combustion of hydrogen (combustion water)
The air offgas 1A containing G and water generated by power generation (power generation water) is sent to the water recovery device 3 to recover water. The water recovery device 3 has, for example, a structure in which a water-cooled heat exchanger 5 is housed in a water recovery tower 4, and the water condensed by the heat exchanger 5 is stored as recovered water 6 at the bottom of the water recovery tower 4. The recovered water 6 is sent to the ion-exchange water treatment device 8 by the pump 7A, accumulated in the water tank 9 as makeup water 10 with impurities removed, and sent to the fuel reformer 2 by the pump 7C as necessary. , Is added to raw fuel as high-temperature steam and used as reaction water necessary for steam reforming of raw fuel.

【０００４】[0004]

【発明が解決しようとする課題】燃焼排ガスを熱交換器
で凝縮して得られる回収水には、燃焼排ガス中の炭酸ガ
ス濃度に比例した飽和濃度の炭酸ガスが含まれる。した
がって、燃焼排ガスと空気オフガスとが混合した排ガス
中の水分を一つの熱交換器で凝縮して得られる従来の回
収水には多量の炭酸ガスが溶解した状態となる。このよ
うな回収水をイオン交換式水処理装置に供給すると、炭
酸ガスがイオン交換樹脂の負荷となり、イオン交換樹脂
の再生サイクルが短くなるため、その再生費用が嵩むば
かりか、その保守作業工数も増大するという問題が発生
する。また、回収水を脱気処理して炭酸ガスを除去した
のちイオン交換式水処理装置に供給する構成とすれば、
イオン交換樹脂の再生サイクルを延ばすことができる
が、そのためには新たに脱気塔の設置およびその動力を
必要とし、設備の複雑化、大型化や経済的不利益を招く
とともに、装置の補機損失が増大して効率が低下すると
いう問題が発生する。The recovered water obtained by condensing the combustion exhaust gas in the heat exchanger contains carbon dioxide having a saturation concentration proportional to the concentration of carbon dioxide in the combustion exhaust gas. Therefore, a large amount of carbon dioxide gas is dissolved in the conventional recovered water obtained by condensing the moisture in the exhaust gas, which is a mixture of the combustion exhaust gas and the air off-gas, with one heat exchanger. When such recovered water is supplied to the ion-exchange water treatment device, carbon dioxide gas becomes a load on the ion-exchange resin, and the regeneration cycle of the ion-exchange resin is shortened. The problem of increase occurs. Also, if the recovered water is degassed to remove carbon dioxide and then supplied to the ion-exchange water treatment device,
It is possible to extend the regeneration cycle of the ion-exchange resin, but this requires a new degassing tower to be installed and its power, which complicates the equipment, increases the size, and causes economic disadvantages. There is a problem that the loss increases and the efficiency decreases.

【０００５】この発明の目的は、設備の複雑化、大型化
や発電効率の低下を招くことなく炭酸ガスの少ない回収
水を生成でき、したがって、イオン交換樹脂の再生サイ
クルを延長できる回収装置を備えた燃料電池発電装置を
得ることにある。An object of the present invention is to provide a recovery device capable of generating recovered water with less carbon dioxide without complicating and increasing the size of equipment and lowering power generation efficiency, and thus extending the regeneration cycle of ion exchange resin. To obtain a fuel cell power generator.

【０００６】[0006]

【課題を解決するための手段】上記課題を解決するため
に、本発明においては、燃料電池本体から排出される空
気オフガスと燃料改質器から排出される燃焼排ガスとに
含まれる水分を回収し、イオン交換式水処理装置に供給
して燃料改質用の補給水とする燃料電池発電装置の水回
収装置において、 (1) 空気オフガスと燃焼排ガスとを導入して、供給され
た冷却水と直接接触させて含まれる水分を凝縮させて回
収し、処理したガスを排出する水分回収塔と、空気オフ
ガスを導入して、供給された冷却水と直接接触させて含
まれる水分を凝縮させて回収し、処理したガスを排出す
る脱炭酸塔とを、各々の下部に付設された水タンクにお
いて絞り機構を介して連通し、水分回収塔の下部に付設
された水タンクの回収水（凝縮水）を冷却器に送って冷
却したのち、その一部を水分回収塔に供給する前記の冷
却水とし、その残部を脱炭酸塔に供給する前記の冷却水
とする。また、脱炭酸塔の下部に付設された水タンクの
回収水（脱炭酸水）を、その水位が前記水分回収塔の下
部に付設された水タンクの回収水の水位より常時高い位
置となるよう保持して、イオン交換式水処理装置に供給
することとする。In order to solve the above problems, in the present invention, the water contained in the air off gas discharged from the fuel cell main body and the combustion exhaust gas discharged from the fuel reformer is recovered. In the water recovery device of the fuel cell power generation device that supplies the ion-exchange water treatment device as make-up water for fuel reforming, (1) introduce air off-gas and combustion exhaust gas, and supply cooling water Water is directly contacted to condense and recover the contained water, and a water recovery tower that discharges the treated gas and air off gas are introduced to directly contact the supplied cooling water to condense and recover the contained water. Then, the decarbonation tower that discharges the treated gas is in communication with the water tank attached to each lower part through a throttling mechanism, and the recovered water (condensed water) in the water tank attached to the lower part of the water recovery tower. Sent to the cooler to cool After the, a part as the cooling water supplied to the water recovery column, and the cooling water and supplies the remainder decarboxylation tower. In addition, the water level of the recovered water (decarbonated water) in the water tank attached to the lower part of the decarbonation tower is always higher than the water level of the recovered water in the water tank attached to the lower part of the moisture recovery tower. It is held and supplied to the ion exchange water treatment device.

【０００７】(2) 上記において、さらに、水分回収塔
に、イオン交換式水処理装置により清浄化された水を供
給する水供給口を設けることとする。 (3) また、上記において、水分回収塔と脱炭酸塔とを隣
接して同一容器中に配置し、水分回収塔に燃焼排ガスと
ともに導入する空気オフガスを脱炭酸塔を通過後の空気
オフガスとし、かつ水分回収塔と脱炭酸塔により水分を
除去された空気オフガスと燃焼排ガスとが同一排出口よ
り排出されることとする。(2) In the above description, the water recovery tower is further provided with a water supply port for supplying water purified by the ion exchange type water treatment device. (3) In the above, the moisture recovery tower and the decarbonation tower are arranged adjacent to each other in the same container, and the air off-gas introduced into the moisture recovery tower together with the combustion exhaust gas is the air off-gas after passing through the decarbonation tower, In addition, the air off gas and the combustion exhaust gas from which the moisture has been removed by the moisture recovery tower and the decarbonation tower are discharged from the same outlet.

【０００８】[0008]

【作用】本発明においては、燃料電池本体から排出され
る空気オフガスと燃料改質器から排出される燃焼排ガス
とに含まれる水分を回収し、イオン交換式水処理装置に
供給して燃料改質用の補給水とする燃料電池発電装置の
水回収装置を、上記(1) のように、空気オフガスと燃焼
排ガスとに含まれる水分を冷却水と直接接触させて回収
する水分回収塔と、空気オフガスに含まれる水分を冷却
水と直接接触させて回収する脱炭酸塔とを、各々の下部
に付設された水タンクの間を絞り機構を介して連通し、
水分回収塔の水タンクに回収された凝縮水を冷却器に送
って冷却したのち、その一部を水分回収塔に、またその
残部を脱炭酸塔に冷却水として供給し、一方、脱炭酸塔
の水タンクに回収された脱炭酸水は、その水位が水分回
収塔の水タンクの凝縮水の水位より常時高い位置となる
よう保持して、イオン交換式水処理装置に供給する構成
としたので、 脱炭酸塔の脱炭酸水は水分回収塔の水タンクへと流
れ、特に絞り機構内を一定速度以上で流れるので、凝縮
水が脱炭酸水に拡散して脱炭酸塔の水タンクへと流入す
るのが防止される。In the present invention, the water contained in the air off-gas discharged from the fuel cell body and the combustion exhaust gas discharged from the fuel reformer is recovered and supplied to the ion exchange type water treatment device to reform the fuel. As described in (1) above, the water recovery device of the fuel cell power generator that is used as makeup water for water is a water recovery tower that recovers the water contained in the air off-gas and the combustion exhaust gas by directly contacting with the cooling water, and the air. The decarbonation tower, which collects the water contained in the offgas by directly contacting the cooling water with the cooling water, communicates between the water tanks attached to the lower parts of the towers via a throttling mechanism,
After the condensed water collected in the water tank of the water recovery tower is sent to a cooler to be cooled, a part of the condensed water is supplied to the water recovery tower and the rest is supplied to the decarbonation tower as cooling water. The decarbonated water collected in the water tank is kept so that its water level is always higher than the water level of the condensed water in the water tank of the water recovery tower, and is supplied to the ion exchange water treatment device. , The decarbonated water of the decarbonation tower flows to the water tank of the moisture recovery tower, especially because it flows at a certain speed or more in the throttling mechanism, so the condensed water diffuses into the decarbonated water and flows into the water tank of the decarbonation tower. Is prevented.

【０００９】炭酸ガスを含んだ燃焼排ガスは、水分回
収塔へ導入され凝縮水中へ取り込まれるが、この凝縮水
は水分回収塔へ供給される冷却水ばかりでなく、脱炭酸
塔へ供給される冷却水のうち上記の絞り機構を通して水
分回収塔の水タンクに流入する脱炭酸水を加えた多量の
水により希釈される。 したがって、再び冷却器で冷却され脱炭酸塔および水分
回収塔へ供給される冷却水の炭酸ガス濃度は低いレベル
に維持されることとなるので、イオン交換式水処理装置
へと供給される脱炭酸水に含まれる炭酸ガスの濃度を低
いレベルに抑えることができ、イオン交換樹脂の負担を
軽減することが可能となる。The combustion exhaust gas containing carbon dioxide gas is introduced into the moisture recovery tower and taken into the condensed water. This condensed water is not only the cooling water supplied to the moisture recovery tower but also the cooling supplied to the decarbonation tower. Of the water, it is diluted with a large amount of water added with decarbonated water which flows into the water tank of the water recovery tower through the above throttling mechanism. Therefore, the carbon dioxide concentration of the cooling water cooled by the cooler again and supplied to the decarbonation tower and the water recovery tower will be maintained at a low level, so that the decarbonation supplied to the ion-exchange water treatment equipment will be maintained. The concentration of carbon dioxide gas contained in water can be suppressed to a low level, and the burden on the ion exchange resin can be reduced.

【００１０】また、上記(2) のように、水分回収塔にイ
オン交換式水処理装置により清浄化された水を供給する
水供給口を設けることとすれば、水分回収塔のみなら
ず、同時に脱炭酸塔についても、初期水の確保、あるい
は回収水の不足の調整を効果的に行うことができる。ま
た、上記(3) のように、水分回収塔と脱炭酸塔とを隣接
して同一容器中に配置し、水分回収塔に燃焼排ガスとと
もに導入する空気オフガスを脱炭酸塔を通過後の空気オ
フガスとし、水分回収塔と脱炭酸塔において水分が除去
された空気オフガスと燃焼排ガスとを同一排出口より排
出することとすれば、上記(1) のように脱炭酸塔とから
イオン交換式水処理装置へと供給される脱炭酸水に含ま
れる炭酸ガスの濃度を低いレベルに抑えることができる
とともに、据付け面積が小さく経済性の高い水回収装置
を得ることができる。Further, as in the above (2), if the water recovery tower is provided with a water supply port for supplying the water purified by the ion exchange type water treatment device, not only the water recovery tower but at the same time Also in the decarbonation tower, it is possible to effectively secure the initial water or adjust the shortage of the recovered water. Further, as in the above (3), the water recovery tower and the decarbonation tower are arranged adjacent to each other in the same container, and the air off-gas introduced into the water recovery tower together with the combustion exhaust gas is the air off-gas after passing through the decarbonation tower. If the air off gas and the combustion exhaust gas from which moisture has been removed in the water recovery tower and the decarbonation tower are to be discharged from the same outlet, the ion exchange water treatment from the decarbonation tower is performed as in (1) above. The concentration of carbon dioxide gas contained in the decarbonated water supplied to the apparatus can be suppressed to a low level, and a water recovery apparatus having a small installation area and high economic efficiency can be obtained.

【００１１】[0011]

【実施例】以下、この発明を実施例に基づいて説明す
る。図１は、この発明による燃料電池発電装置の水回収
装置の第１の実施例を模式化して示す断面図である。図
において、水回収装置は、水分回収塔１１と脱炭酸塔１
２により構成されている。水分回収塔１１には、上部に
散水用のノズル１３Ａが、また下部には、後述する脱炭
酸塔１２の水タンク１５Ｂと絞り１６を介して連通され
た、回収水（凝縮水）６Ａを貯留する水タンク１５Ａが
設置され、水タンク１５Ａの上部には空気オフガス供給
口１７Ａ、燃焼排ガス供給口１８ならびに補給用の水供
給口２０が設けられている。また、脱炭酸塔１２には、
上部に散水用のノズル１３Ｂが、また下部には回収水
（脱炭酸水）６Ｂを貯留する水タンク１５Ｂが設置さ
れ、水タンク１５Ｂの上部には空気オフガス供給口１７
Ｂが設けられている。ポンプ７Ｂにより液対液冷却器２
１に送られ、低温の冷却水との熱交換により冷却された
回収水の一部は、ノズル１３Ａにより水分回収塔１１の
充填層１４Ａへと散水され、空気オフガス供給口１７Ａ
と燃焼排ガス供給口１８から導入された空気オフガス１
Ａおよび燃焼排ガス２Ｇと直接接触することにより、こ
れらのガス中の水分を凝縮し水タンク１５Ａに回収水
（凝縮水）６Ａとして貯留する。一方回収水の残部はノ
ズル１３Ｂにより脱炭酸塔１２の充填層１４Ｂへと散水
され、空気オフガス供給口１７Ｂから導入された空気オ
フガス１Ａと直接接触し水分を凝縮し水タンク１５Ｂに
回収水（脱炭酸水）６Ｂとして貯留する。水タンク１５
Ｂに貯留された回収水（脱炭酸水）６Ｂの水位は水タン
ク１５Ａに貯留された回収水（凝縮水）６Ａの水位より
高く保持されており、脱炭酸水６Ｂの一部は、絞り１６
を通して水タンク１５Ａへと送られ、凝縮水６Ａととも
に前記の液対液冷却器２１に送られ冷却される回収水と
なる。また、脱炭酸水６Ｂの残部は、ポンプ７Ａにより
イオン交換式水処理装置８へと送られて清浄化され、必
要に応じて図示しない燃料改質器へと送られる。EXAMPLES The present invention will be described below based on examples. FIG. 1 is a sectional view schematically showing a first embodiment of a water recovery device for a fuel cell power generator according to the present invention. In the figure, the water recovery device includes a water recovery tower 11 and a decarbonation tower 1
It is composed of two. The water recovery tower 11 stores a sprinkling nozzle 13A in the upper part, and the recovered water (condensed water) 6A in the lower part, which is communicated with a water tank 15B of the decarbonation tower 12 described later through a throttle 16. A water tank 15A is installed, and an air off-gas supply port 17A, a combustion exhaust gas supply port 18 and a replenishment water supply port 20 are provided above the water tank 15A. Also, in the decarbonation tower 12,
A nozzle 13B for sprinkling water is installed in the upper part, a water tank 15B for storing recovered water (decarbonated water) 6B is installed in the lower part, and an air off gas supply port 17 is installed in the upper part of the water tank 15B.
B is provided. Liquid-to-liquid cooler 2 by pump 7B
1, part of the recovered water cooled by heat exchange with low-temperature cooling water is sprayed to the packed bed 14A of the water recovery tower 11 by the nozzle 13A, and the air off gas supply port 17A
And air off gas 1 introduced from the combustion exhaust gas supply port 18
By making direct contact with A and the combustion exhaust gas 2G, the water in these gases is condensed and stored in the water tank 15A as recovered water (condensed water) 6A. On the other hand, the remaining portion of the recovered water is sprayed by the nozzle 13B to the packed bed 14B of the decarbonation tower 12, and is directly contacted with the air off-gas 1A introduced from the air off-gas supply port 17B to condense water to recover the recovered water (de-ionized water) in the water tank 15B. Store as carbonated water) 6B. Water tank 15
The water level of the recovered water (decarbonated water) 6B stored in B is kept higher than the water level of the recovered water (condensed water) 6A stored in the water tank 15A.
It is sent to the water tank 15A through the water and is sent to the liquid-to-liquid cooler 21 together with the condensed water 6A to be recovered water. Further, the remaining portion of the decarbonated water 6B is sent to the ion exchange water treatment device 8 by the pump 7A to be cleaned, and is sent to a fuel reformer (not shown) if necessary.

【００１２】この構成においては、水分回収塔１１の燃
焼排ガス供給口１８から導入された燃焼排ガス２Ｇ中の
炭酸ガスが多量の回収水により希釈されることとなるの
で、イオン交換式水処理装置８へと送られる脱炭酸水６
Ｂの炭酸ガス濃度が低く抑えられ、イオン交換樹脂の再
生サイクルを長くすることができる。なお、絞り１６
は、調整して一定流速以上とすることにより凝縮水６Ａ
の水タンク１５Ｂへの拡散、逆流を阻止する役割をはた
し、同時に異物の付着も防止することができる。また、
水分回収塔１１の水タンク１５Ａの上部に設けられてい
る補給用の水供給口２０は、初期水の確保、あるいは回
収水の不足の調整のために、清浄水を補給するためのも
のである。この水供給口２０を用いれば、水分回収塔１
１の水タンク１５Ａへの補給ばかりでなく、脱炭酸塔１
２の水タンク１５Ｂへの補給も同時に可能であり、脱炭
酸塔１２には別個に補給用の水供給口を設置する必要が
なく効率的である。In this structure, since the carbon dioxide gas in the combustion exhaust gas 2G introduced from the combustion exhaust gas supply port 18 of the water recovery tower 11 is diluted with a large amount of recovered water, the ion exchange type water treatment device 8 Decarbonated water sent to 6
The carbon dioxide concentration of B can be suppressed low, and the regeneration cycle of the ion exchange resin can be lengthened. The aperture 16
Is adjusted by adjusting the flow rate to a certain level or more, so that the condensed water 6A
It plays the role of preventing the diffusion and backflow of water into the water tank 15B, and at the same time, it is possible to prevent the adhesion of foreign matter. Also,
The water supply port 20 for replenishment provided in the upper part of the water tank 15A of the water recovery tower 11 is for replenishing clean water in order to secure initial water or adjust the shortage of recovered water. . By using this water supply port 20, the water recovery tower 1
1 not only replenishing the water tank 15A but also the decarbonation tower 1
The second water tank 15B can be replenished at the same time, and there is no need to separately install a replenishment water supply port in the decarbonation tower 12, which is efficient.

【００１３】図２は、この発明による燃料電池発電装置
の水回収装置の第２の実施例を模式化して示す断面図で
ある。第１の実施例と同一機能を有する構成部分には同
一符号を付して説明を省略する。この第２の実施例の第
１の実施例との相違点は、水分回収塔１１と脱炭酸塔１
２とが隣接して構成され、第１の実施例の空気オフガス
供給口１７Ａに代わるものとして、水分回収塔１１と脱
炭酸塔１２との隔壁に、脱炭酸塔１２を通過した空気オ
フガス１Ａを脱炭酸塔１２へと送る空気オフガス通流口
２２が設けられていること、また第１の実施例のガス排
出口１９Ａ、１９Ｂに代わり、これらの役割を共用する
ガス排出口１９が設けられていることにある。この構成
では、第１の実施例の燃料電池発電装置の水回収装置と
同様にイオン交換式水処理装置８へと送られる脱炭酸水
６Ｂの炭酸ガス濃度が低く抑えられ、イオン交換樹脂の
再生サイクルを長くすることができるとともに、据付け
面積が小さく経済性の高い水回収装置を得ることができ
る。FIG. 2 is a schematic sectional view showing a second embodiment of the water recovery device of the fuel cell power generator according to the present invention. The components having the same functions as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The difference between the second embodiment and the first embodiment is that the water recovery tower 11 and the decarbonation tower 1 are
2 and the air off-gas supply port 17A of the first embodiment, the air off-gas 1A that has passed through the decarbonation tower 12 is provided on the partition wall between the moisture recovery tower 11 and the decarbonation tower 12. An air-off gas passage 22 for sending to the decarbonation tower 12 is provided, and a gas outlet 19 that shares these roles is provided instead of the gas outlets 19A and 19B of the first embodiment. To be there. With this configuration, the carbon dioxide concentration of the decarbonated water 6B sent to the ion-exchange water treatment device 8 is suppressed to a low level as in the water recovery device of the fuel cell power generator of the first embodiment, and the ion-exchange resin is regenerated. It is possible to prolong the cycle and obtain a water recovery device having a small installation area and high economy.

【００１４】[0014]

【発明の効果】この発明においては、燃料電池本体から
排出される空気オフガスと燃料改質器から排出される燃
焼排ガスとに含まれる水分を回収し、イオン交換式水処
理装置に供給して燃料改質用の補給水とする燃料電池発
電装置の水回収装置を、 (1) 前記空気オフガスと前記燃焼排ガスとを導入して、
供給された冷却水と直接接触させて含まれる水分を凝縮
させて回収し、処理したガスを排出する水分回収塔と、
前記空気オフガスを導入して、供給された冷却水と直接
接触させて含まれる水分を凝縮させて回収し、処理した
ガスを排出する脱炭酸塔とを、各々の下部に付設された
水タンクにおいて絞り機構を介して連通し、前記水分回
収塔の下部に付設された水タンクの回収水（凝縮水）を
冷却器に送って冷却したのち、その一部を前記水分回収
塔に供給する前記の冷却水とし、その残部を前記脱炭酸
塔に供給する前記の冷却水とし、さらに、前記脱炭酸塔
の下部に付設された水タンクの回収水（脱炭酸水）は、
その水位が前記水分回収塔の下部に付設された水タンク
の回収水の水位より常時高い位置となるよう保持して、
イオン交換式水処理装置に供給することとしたので、イ
オン交換式水処理装置へと送られる脱炭酸水の炭酸ガス
濃度を低く抑えることが可能となり、脱気塔の設置など
設備の大型化や発電効率の低下をきたすことなく、イオ
ン交換樹脂の再生サイクルの長い燃料電池発電装置の水
回収装置を得ることができる。According to the present invention, the water contained in the air off-gas discharged from the fuel cell main body and the combustion exhaust gas discharged from the fuel reformer is recovered and supplied to the ion exchange type water treatment device to produce the fuel. A water recovery device of the fuel cell power generation device as reforming make-up water, (1) introducing the air off-gas and the combustion exhaust gas,
A moisture recovery tower for directly contacting the supplied cooling water to condense and recover the moisture contained therein, and discharging the treated gas,
Introducing the air off-gas, directly contacting the supplied cooling water to condense and recover the water contained therein, and a decarbonation tower for discharging the treated gas, in a water tank attached to each lower part. The recovered water (condensed water) in a water tank attached to the lower part of the water recovery tower is sent to a cooler for cooling, and a part of the water is supplied to the water recovery tower. The cooling water, the rest is the cooling water to be supplied to the decarbonation tower, further, the recovered water (decarbonated water) of the water tank attached to the lower part of the decarbonation tower,
Hold the water level so that it is always higher than the water level of the recovered water in the water tank attached to the lower part of the water recovery tower,
Since it was decided to supply it to the ion-exchange water treatment equipment, the carbon dioxide concentration of the decarbonated water sent to the ion-exchange water treatment equipment could be kept low, and equipment such as the installation of a degassing tower could be made larger. It is possible to obtain a water recovery device for a fuel cell power generator having a long ion-exchange resin regeneration cycle without causing a reduction in power generation efficiency.

【００１５】(2) 上記において、さらに、前記水分回収
塔にイオン交換式水処理装置により清浄化された水を供
給する補給用の水供給口を設けることとしたので、脱炭
酸塔に別個に水供給口を設置する必要がなく、初期水の
確保、あるいは回収水の不足の調整が効率的に行える燃
料電池発電装置の水回収装置を得ることができる。 (3) また、上記において、水分回収塔と脱炭酸塔とを隣
接して同一容器中に配置し、水分回収塔に燃焼排ガスと
ともに導入する空気オフガスを脱炭酸塔を通過後の空気
オフガスとし、水分回収塔と脱炭酸塔において水分が除
去された空気オフガスと燃焼排ガスとを同一排出口より
排出することとしたので、イオン交換式水処理装置へと
送られる脱炭酸水の炭酸ガス濃度が低く抑えられイオン
交換樹脂の再生サイクルを長くすることができるるばか
りでなく、同時に据付け面積が小さく経済性の高い燃料
電池発電装置の水回収装置を得ることができる。(2) In the above, further, since the water recovery inlet is provided with a water supply port for replenishment for supplying water purified by the ion exchange type water treatment device, it is separately provided in the decarbonation tower. It is not necessary to install a water supply port, and it is possible to obtain a water recovery device of a fuel cell power generation device that can efficiently secure initial water or adjust the shortage of recovered water. (3) In the above, the moisture recovery tower and the decarbonation tower are arranged adjacent to each other in the same container, and the air off-gas introduced into the moisture recovery tower together with the combustion exhaust gas is the air off-gas after passing through the decarbonation tower, Since the air off gas and the combustion exhaust gas from which the moisture has been removed in the water recovery tower and the decarbonation tower are to be discharged from the same outlet, the carbon dioxide concentration of the decarbonated water sent to the ion exchange water treatment device is low. Not only can it be suppressed and the regeneration cycle of the ion exchange resin can be lengthened, but at the same time, a water recovery device for a fuel cell power generator having a small installation area and high economy can be obtained.

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

【図１】この発明による燃料電池発電装置の水回収装置
の第１の実施例を模式化して示す断面図FIG. 1 is a sectional view schematically showing a first embodiment of a water recovery device for a fuel cell power generator according to the present invention.

【図２】この発明による燃料電池発電装置の水回収装置
の第２の実施例を模式化して示す断面図FIG. 2 is a sectional view schematically showing a second embodiment of the water recovery device of the fuel cell power generator according to the present invention.

【図３】燃料電池発電装置における従来の補給水の回収
および処理系を示す構成図FIG. 3 is a configuration diagram showing a conventional makeup water recovery and treatment system in a fuel cell power generator.

【符号の説明】[Explanation of symbols]

１ リン酸形燃料電池 １Ａ 空気オフガス ２ 燃料改質器 ２Ｇ 燃焼排ガス ３ 従来の水回収装置 ６Ａ 回収水（凝縮水） ６Ｂ 回収水（脱炭酸水） ７Ａ ポンプ ７Ｂ ポンプ ７Ｃ ポンプ ８ イオン交換式水処理装置 １１ 水分回収塔 １２ 脱炭酸塔 １３Ａ ノズル １３Ｂ ノズル １４Ａ 充填層 １４Ｂ 充填層 １５Ａ 水タンク １５Ｂ 水タンク １６ 絞り １７Ａ 空気オフガス供給口 １７Ｂ 空気オフガス供給口 １８ 燃焼排ガス供給口 １９ ガス排出口 １９Ａ ガス排出口 １９Ｂ ガス排出口 ２０ 水供給口 ２１ 液対液冷却器 ２２ 空気オフガス通流口 1 Phosphoric Acid Fuel Cell 1A Air Off Gas 2 Fuel Reformer 2G Combustion Exhaust Gas 3 Conventional Water Recovery Device 6A Recovered Water (Condensed Water) 6B Recovered Water (Decarbonated Water) 7A Pump 7B Pump 7C Pump 8 Ion Exchange Water Treatment Apparatus 11 Moisture recovery tower 12 Decarbonation tower 13A Nozzle 13B Nozzle 14A Packed bed 14B Packed bed 15A Water tank 15B Water tank 16 Throttling 17A Air off gas supply port 17B Air off gas supply port 18 Combustion exhaust gas supply port 19 Gas discharge port 19A Gas discharge port 19B Gas outlet 20 Water supply port 21 Liquid-to-liquid cooler 22 Air-off gas flow port

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】燃料電池本体より排出される空気オフガス
と燃料改質器より排出される燃焼排ガスから含まれる水
分を回収し、イオン交換式水処理装置に供給して燃料改
質用の補給水とする燃料電池発電装置の水回収装置にお
いて、前記空気オフガスと前記燃焼排ガスとを導入し
て、供給された冷却水と直接接触させて含まれる水分を
凝縮させて回収し、処理したガスを排出する水分回収塔
と、前記空気オフガスを導入して、供給された冷却水と
直接接触させて含まれる水分を凝縮させて回収し、処理
したガスを排出する脱炭酸塔とを、各々の下部に付設さ
れた水タンクにおいて絞り機構を介して連通し、前記水
分回収塔の下部に付設された水タンクの回収水を冷却器
に送って冷却したのち、その一部を前記水分回収塔に供
給する前記の冷却水とし、その残部を前記脱炭酸塔に供
給する前記の冷却水とし、さらに、前記脱炭酸塔の下部
に付設された水タンクの回収水を、その水位が前記水分
回収塔の下部に付設された水タンクの回収水の水位より
常時高い位置となるよう保持して、イオン交換式水処理
装置に供給することを特徴とする燃料電池発電装置の水
回収装置。1. Water contained in air off-gas discharged from a fuel cell body and combustion exhaust gas discharged from a fuel reformer is recovered and supplied to an ion-exchange water treatment device to make up water for fuel reforming. In the water recovery device of the fuel cell power generator, the air off-gas and the combustion exhaust gas are introduced to directly contact with the supplied cooling water to condense and recover the contained water, and the treated gas is discharged. A water recovery tower for introducing the air off gas, and a decarbonation tower for introducing and cooling the supplied cooling water to condense and recover the water contained therein and to discharge the treated gas. After communicating with the attached water tank through a throttling mechanism, the recovered water in the attached water tank at the bottom of the water recovery tower is sent to a cooler for cooling, and then a part of it is supplied to the water recovery tower. Cooling water Then, the remaining part thereof is used as the cooling water to be supplied to the decarbonation tower, and the recovered water of the water tank attached to the lower part of the decarbonation tower is attached to the lower part of the water content recovery tower. A water recovery device for a fuel cell power generation device, characterized in that the recovered water in the water tank is always maintained at a position higher than the water level and supplied to an ion-exchange water treatment device. 【請求項２】前記水分回収塔にイオン交換式水処理装置
により清浄化された水を供給する水供給口を設けたこと
を特徴とする請求項１記載の燃料電池発電装置の水回収
装置。2. A water recovery device for a fuel cell power generator according to claim 1, wherein the water recovery tower is provided with a water supply port for supplying water purified by an ion exchange type water treatment device. 【請求項３】前記水分回収塔と前記脱炭酸塔とを隣接し
て同一容器中に配置し、前記水分回収塔に燃焼排ガスと
ともに導入する空気オフガスを前記脱炭酸塔を通過後の
空気オフガスとし、前記水分回収塔と前記脱炭酸塔によ
り水分を除去された前記空気オフガスと前記燃焼排ガス
とが同一排出口より排出されることを特徴とする請求項
１または２記載の燃料電池発電装置の水回収装置。3. The moisture recovery tower and the decarbonation tower are arranged adjacent to each other in the same container, and the air off-gas introduced into the moisture recovery tower together with the combustion exhaust gas is used as the air off-gas after passing through the decarbonation tower. The water of the fuel cell power generator according to claim 1 or 2, wherein the air off-gas and the combustion exhaust gas from which water has been removed by the water recovery tower and the decarbonation tower are discharged from the same outlet. Recovery device.
JP06165685A 1994-07-19 1994-07-19 Water recovery system for fuel cell power plant Expired - Lifetime JP3132627B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06165685A JP3132627B2 (en) 1994-07-19 1994-07-19 Water recovery system for fuel cell power plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06165685A JP3132627B2 (en) 1994-07-19 1994-07-19 Water recovery system for fuel cell power plant

Publications (2)

Publication Number Publication Date
JPH0831443A true JPH0831443A (en) 1996-02-02
JP3132627B2 JP3132627B2 (en) 2001-02-05

Family

ID=15817101

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004281075A (en) * 2003-03-12 2004-10-07 Seibu Gas Co Ltd Water treatment device for solid polymer type fuel cell
JP2005129381A (en) * 2003-10-24 2005-05-19 Matsushita Electric Ind Co Ltd Water treatment apparatus of fuel cell system
JP2007134247A (en) * 2005-11-11 2007-05-31 Sanyo Electric Co Ltd Fuel cell device
JP2008198400A (en) * 2007-02-08 2008-08-28 Toshiba Fuel Cell Power Systems Corp Fuel cell power generation system
WO2011093066A1 (en) * 2010-01-27 2011-08-04 パナソニック株式会社 Fuel cell system and operation method therefor
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004281075A (en) * 2003-03-12 2004-10-07 Seibu Gas Co Ltd Water treatment device for solid polymer type fuel cell
JP4655451B2 (en) * 2003-03-12 2011-03-23 西部瓦斯株式会社 Polymer electrolyte fuel cell system
JP2005129381A (en) * 2003-10-24 2005-05-19 Matsushita Electric Ind Co Ltd Water treatment apparatus of fuel cell system
JP2007134247A (en) * 2005-11-11 2007-05-31 Sanyo Electric Co Ltd Fuel cell device
JP2008198400A (en) * 2007-02-08 2008-08-28 Toshiba Fuel Cell Power Systems Corp Fuel cell power generation system
KR101417120B1 (en) * 2008-11-07 2014-07-08 현대자동차주식회사 Water trap system for fuel cell vehicle
WO2011093066A1 (en) * 2010-01-27 2011-08-04 パナソニック株式会社 Fuel cell system and operation method therefor
JP5048870B2 (en) * 2010-01-27 2012-10-17 パナソニック株式会社 Fuel cell system and operation method thereof

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