JP2903861B2 - Gas turbine exhaust gas purification equipment - Google Patents
Gas turbine exhaust gas purification equipmentInfo
- Publication number
- JP2903861B2 JP2903861B2 JP12893092A JP12893092A JP2903861B2 JP 2903861 B2 JP2903861 B2 JP 2903861B2 JP 12893092 A JP12893092 A JP 12893092A JP 12893092 A JP12893092 A JP 12893092A JP 2903861 B2 JP2903861 B2 JP 2903861B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- catalyst
- compressor
- turbine
- gas passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Exhaust Gas After Treatment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はガスタービンの排気ガス
浄化装置に係わり、特にガスタービンの始動時およびア
イドリング運転時にガスタービンから排出される性状の
悪いガスが外部に排出されることを防止する排気ガス浄
化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for a gas turbine, and more particularly, to preventing gas of poor quality from being exhausted from the gas turbine when the gas turbine is started or idling. The present invention relates to an exhaust gas purification device.
【０００２】[0002]
【従来の技術】ガスタービンは重量当たりの出力が大き
いことから、自動車の駆動源としても注目されている。
ガスタービンの排気ガスは通常の内燃機関の排気ガスに
比較してカーボン含有量だけでなく他窒素酸化物、一酸
化炭素および炭化水素等の有毒成分の含有量も少ないも
のの、これらの成分を直接大気に放出することは望まし
いことではない。2. Description of the Related Art Gas turbines have attracted attention as driving sources for automobiles because of their large output per weight.
Exhaust gas from gas turbines has a lower carbon content and lower toxic components such as nitrogen oxides, carbon monoxide and hydrocarbons than ordinary internal combustion engine exhaust gas. Release to the atmosphere is not desirable.
【０００３】そこで排気ガスを浄化するとともに、ガス
タービンの熱効率を向上させるために、排気ガスとガス
タービン吸気との間で熱交換をおこなう再生器を設置す
るガスタービンが提案されている（特開平２−２５６８
１６公報参照）。この再生器のガス側通路に酸化触媒お
よび三元触媒を設置し、酸化触媒で排気ガスの熱を利用
してカーボン、一酸化炭素を酸化するだけでなく、三元
触媒で窒素酸化物の還元と一酸化炭素および炭化水素の
酸化とを行い排気ガスを無害化して大気に放出される。In order to purify the exhaust gas and improve the thermal efficiency of the gas turbine, there has been proposed a gas turbine in which a regenerator for exchanging heat between the exhaust gas and the gas turbine intake is installed (Japanese Patent Application Laid-Open No. HEI 9-1994). 2-2568
16 gazette). An oxidation catalyst and a three-way catalyst are installed in the gas side passage of this regenerator. The oxidation catalyst not only oxidizes carbon and carbon monoxide using the heat of exhaust gas, but also reduces nitrogen oxides with a three-way catalyst. And the oxidation of carbon monoxide and hydrocarbons to make the exhaust gas harmless and released to the atmosphere.
【０００４】一方排気ガスの熱は再生器の空気通路側を
流れる空気に伝達され、燃焼器に入る空気の温度を高め
てガスタービンの熱効率を向上させる。On the other hand, the heat of the exhaust gas is transmitted to the air flowing on the air passage side of the regenerator, thereby increasing the temperature of the air entering the combustor and improving the thermal efficiency of the gas turbine.
【０００５】[0005]
【発明が解決しようとする課題】しかし上記提案にかか
る再生器においては定格運転状態において排気ガスを浄
化することが可能であるものの、アイドリング運転状態
においては排気ガスの温度が低いために触媒が十分に活
性化せず排気ガスが十分に浄化されない場合が生じる。However, in the regenerator according to the above proposal, it is possible to purify the exhaust gas in the rated operation state, but in the idling operation state, the exhaust gas temperature is low, so that the catalyst is insufficient. And the exhaust gas is not sufficiently purified.
【０００６】さらにガスタービンの始動時には未燃燃料
が排出されるために、排気ガス中に白煙が発生すること
を避けることはできない。本発明はかかる問題点に鑑み
なされたものであって、ガスタービンの始動から低負荷
運転状態の範囲で排気ガスの浄化が可能なガスタービン
の排気ガス浄化装置を提供することを目的とする。Further, since unburned fuel is discharged when the gas turbine is started, generation of white smoke in the exhaust gas cannot be avoided. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an exhaust gas purifying apparatus for a gas turbine capable of purifying exhaust gas in a range from a start of the gas turbine to a low load operation state.
【０００７】[0007]
【課題を解決するための手段】本発明にかかるガスター
ビンの排気ガス浄化装置は、コンプレッサと、コンプレ
ッサで圧縮された空気の中に燃料を噴射して燃焼させる
燃焼器と、燃焼器から排出される燃焼ガスによって駆動
されコンプレッサを駆動する排気タービンと、排気ター
ビンを駆動した後の排気ガスを浄化するための触媒と、
始動時に排気ガスをコンプレッサの吸気口に直接還流さ
せる第１の排気ガス流路と、ガスタービンの始動後に排
気ガスで該触媒を暖機するために触媒を通過させた後に
排気ガスをコンプレッサの吸気口に還流させる第２の排
気ガス流路と、触媒の暖機完了後に排気ガスを触媒を通
過させることによって浄化した後に大気に排出する第３
の排気ガス流路と、を備える。SUMMARY OF THE INVENTION An exhaust gas purifying apparatus for a gas turbine according to the present invention includes a compressor, a combustor for injecting fuel into air compressed by the compressor and burning the same, and an exhaust gas discharged from the combustor. An exhaust turbine driven by the combustion gas to drive the compressor, a catalyst for purifying exhaust gas after driving the exhaust turbine,
A first exhaust gas flow path that directly recirculates exhaust gas to an intake port of the compressor at the time of starting; and, after starting the gas turbine, passing the catalyst through the exhaust gas to warm up the catalyst. A second exhaust gas flow path that is recirculated to the mouth, and a third exhaust gas that is purified by passing the catalyst through the catalyst after warming-up of the catalyst is completed and then discharged to the atmosphere.
Exhaust gas passage.
【０００８】[0008]
【作用】本発明にかかるガスタービンの浄化装置にあっ
ては、始動時には排気ガスは直接コンプレッサに還流さ
れるため、未燃燃料によって生じる白煙が大気に放出さ
れることが防止される。始動後には排気ガスは触媒を通
過した後コンプレッサに還流されるため、触媒の暖機が
促進されるだけでなく性状の悪い排気ガスが大気に放出
されることが防止される。In the gas turbine purifying apparatus according to the present invention, since the exhaust gas is directly returned to the compressor at the time of starting, the white smoke generated by the unburned fuel is prevented from being released to the atmosphere. After the start, the exhaust gas is returned to the compressor after passing through the catalyst, so that not only the warming-up of the catalyst is promoted but also the exhaust gas having poor properties is prevented from being released to the atmosphere.
【０００９】触媒の暖機が完了した後には、排気ガスは
触媒によって浄化されるため性状の悪い排気ガスが大気
に放出されることが防止される。ガスタービンの回転数
が所定回転数以上となれば、排気ガスの性状は直接大気
に排出される。After the warm-up of the catalyst is completed, the exhaust gas is purified by the catalyst, thereby preventing exhaust gas having poor properties from being released to the atmosphere. When the rotation speed of the gas turbine is equal to or higher than a predetermined rotation speed, the properties of the exhaust gas are directly discharged to the atmosphere.
【００１０】[0010]
【実施例】図１は本発明にかかるガスタービンの排気ガ
ス浄化装置の実施例構成図であって、ガスタービン１０
０はコンプレッサ１０１と排気タービン１０２とが軸１
０３によって直結されている。軸１０３はコンプレッサ
１０１の外側に延びており、例えば駆動輪である負荷１
０４を駆動する。FIG. 1 is a block diagram showing an embodiment of an exhaust gas purifying apparatus for a gas turbine according to the present invention.
0 indicates that the compressor 101 and the exhaust turbine 102 have the shaft 1
03 is directly connected. The shaft 103 extends outside the compressor 101, and includes, for example, a load 1 that is a driving wheel.
04 is driven.
【００１１】コンプレッサ１０１で圧縮された空気は燃
焼器１０５において燃料噴射ノズル１０６から噴射され
る燃料と混合されて燃焼し、燃焼ガスとなって排気ター
ビン１０２を駆動する。排気タービン１０２から排出さ
れる排気ガスは排気ガス流路１１１に導かれるが、途中
で第１主排気ガス流路１１２とバイパス排気ガス流路１
１３の２つに分岐する。The air compressed by the compressor 101 is mixed with fuel injected from the fuel injection nozzle 106 in the combustor 105 and burns, and becomes combustion gas to drive the exhaust turbine 102. Exhaust gas discharged from the exhaust turbine 102 is guided to the exhaust gas passage 111, and the first main exhaust gas passage 112 and the bypass exhaust gas passage 1
Branches into two of 13.
【００１２】第１主排気ガス流路１１２には第１主排気
ガス流路遮断弁１２２が設置される。第１主排気ガス流
路１１２は第１主排気ガス流路遮断弁１２２の後流で第
２主排気ガス流路１１４と触媒排気ガス流路１１５に分
岐する。第２主排気ガス流路１１４は第２主排気ガス流
路遮断弁１２４の後流で大気に開放される。A first main exhaust gas passage shutoff valve 122 is provided in the first main exhaust gas passage 112. The first main exhaust gas passage 112 branches into a second main exhaust gas passage 114 and a catalyst exhaust gas passage 115 downstream of the first main exhaust gas passage shutoff valve 122. The second main exhaust gas passage 114 is opened to the atmosphere downstream of the second main exhaust gas passage shut-off valve 124.
【００１３】触媒排気ガス流路１１５の途中には触媒１
２５が設置され触媒１２５の後流で、途中にバイパス排
気ガス流路遮断弁１２３の設置されたバイパス排気ガス
流路１１３と合流する。この合流点とガスタービン１０
０のコンプレッサ１０１の吸気口との間は、途中に還流
排気ガス流路遮断弁１２６の設けられた還流排気ガス流
路１１６によって接続されている。In the catalyst exhaust gas passage 115, the catalyst 1
A bypass exhaust gas flow path 113 is provided downstream of the catalyst 125 and merges with a bypass exhaust gas flow path 113 provided with a bypass exhaust gas flow path shutoff valve 123 on the way. This junction and the gas turbine 10
0 is connected to the intake port of the compressor 101 by a recirculated exhaust gas flow passage 116 provided with a recirculated exhaust gas flow passage shut-off valve 126 on the way.
【００１４】また触媒排気ガス流路１１５の触媒１２５
の出口側には例えば熱電対である排気ガス温度検出器１
３５が設置されており、検出器１３５で検出される排気
ガス温度が例えば摂氏２５０度である所定温度に到達し
た時に触媒１２５が活性化したものと判断する。図２は
ガスタービンの起動曲線を示すグラフであって、横軸に
時間を、縦軸にガスタービンの回転数をとる。The catalyst 125 in the catalyst exhaust gas passage 115
The exhaust gas temperature detector 1 which is, for example, a thermocouple
When the exhaust gas temperature detected by the detector 135 reaches a predetermined temperature of, for example, 250 degrees Celsius, it is determined that the catalyst 125 has been activated. FIG. 2 is a graph showing a startup curve of the gas turbine, in which the horizontal axis represents time and the vertical axis represents the rotation speed of the gas turbine.
【００１５】そしてガスタービンの運転状態は以下の４
つの状態に区分される。 （Ｉ）時刻ｔ0 で例えばセルモータである起動装置が起
動された後、時刻ｔ1 で例えば３００００ｒｐｍである
自立回転数に到達するまで。 （II）時刻ｔ1 以後時刻ｔ2 で触媒が活性かしたと判断
されるまで。 (III)時刻ｔ2 以後時刻ｔ3 で例えば４００００ｒｐｍ
である所定回転数に到達するまで。 （IV）時刻ｔ3 以後。The operating conditions of the gas turbine are as follows.
Are divided into two states. (I) After the starting device, which is, for example, a starter motor, is started at time t 0 , until the self-sustained rotation speed of, for example, 30,000 rpm is reached at time t 1 . (II) From time t 1 to time t 2 until it is determined that the catalyst is activated. (III) After time t 2 at time t 3 , for example, 40000 rpm
Until a predetermined number of revolutions is reached. (IV) time t 3 after.
【００１６】即ち本実施例においては上記（Ｉ）〜（I
V）までの運転状態に対応して各流路に設けられた遮断
弁を、例えばシーケンサで構成された制御装置で開閉制
御する。図３から図６までは各運転状態におけるフロー
シートであって、太い実線は排気ガスの流れを表す。That is, in this embodiment, the above (I) to (I)
The shutoff valves provided in the respective flow paths corresponding to the operation conditions up to V) are controlled to be opened and closed by a control device including, for example, a sequencer. 3 to 6 are flow sheets in each operation state, and a thick solid line represents a flow of exhaust gas.
【００１７】図３は時刻ｔ0 から時刻ｔ1 までの始動状
態（Ｉ）の排気ガスの流れを示す。即ち第１主排気ガス
流路遮断弁１２２は“閉”とされ、バイパス排気ガス流
路遮断弁１２３および還流排気ガス流路遮断弁１２６は
“開”とされる。この始動状態にあっては排気ガスはバ
イパス排気ガス流路１１３および還流排気ガス流路を経
由してコンプレッサ１０１の吸気口に還流され、始動時
に未燃燃料を含む排気ガスの大気への放出が防止され
る。FIG. 3 shows the flow of exhaust gas in the starting state (I) from time t 0 to time t 1 . That is, the first main exhaust gas passage shutoff valve 122 is “closed”, and the bypass exhaust gas passage shutoff valve 123 and the recirculation exhaust gas passage shutoff valve 126 are “open”. In this starting state, the exhaust gas is recirculated to the intake port of the compressor 101 via the bypass exhaust gas channel 113 and the recirculated exhaust gas channel, and the exhaust gas including unburned fuel is discharged to the atmosphere at the time of starting. Is prevented.
【００１８】図４は時刻ｔ1 から時刻ｔ2 までの触媒活
性前の状態（II）の排気ガスの流れを示す。即ちバイパ
ス排気ガス流路遮断弁１２３および第２主排気ガス流路
遮断弁１２４は“閉”とされ、第１主排気ガス流路遮断
弁１２２および還流排気ガス流路遮断弁１２６は“開”
とされる。FIG. 4 shows the flow of exhaust gas in the state (II) before catalyst activation from time t 1 to time t 2 . That is, the bypass exhaust gas passage shutoff valve 123 and the second main exhaust gas passage shutoff valve 124 are “closed”, and the first main exhaust gas passage shutoff valve 122 and the recirculation exhaust gas passage shutoff valve 126 are “open”.
It is said.
【００１９】この状態にあっては排気ガスは第１主排気
ガス流路１１２、触媒排気ガス流路１１５および還流排
気ガス流路を経由してコンプレッサ１０１の吸気口に還
流され、触媒１２５を暖機するとともに、性状の悪い排
気ガスの大気への放出が防止される。図５は時刻ｔ2 か
ら時刻ｔ3 までの触媒活性後の状態 (III)の排気ガスの
流れを示す。In this state, the exhaust gas is recirculated to the intake port of the compressor 101 via the first main exhaust gas channel 112, the catalyst exhaust gas channel 115, and the recirculated exhaust gas channel, and warms the catalyst 125. In addition, the emission of inferior exhaust gas to the atmosphere is prevented. Figure 5 shows the flow of the exhaust gas state (III) after the catalytic activity from time t 2 to time t 3.
【００２０】即ち第１主排気ガス流路遮断弁１２２およ
び還流排気ガス流路遮断弁１２６は“閉”とされ、バイ
パス排気ガス流路遮断弁１２３および第２主排気ガス流
路遮断弁１２４は“開”とされる。この状態にあっては
排気ガスはバイパス排気ガス流路１１３、触媒排気ガス
流路１１５および第２主排気ガス流路１１４を経由して
大気に放出されるため、低負荷運転状態において性状の
悪い排気ガスが触媒で浄化される。That is, the first main exhaust gas passage shutoff valve 122 and the recirculated exhaust gas passage shutoff valve 126 are closed, and the bypass exhaust gas passage shutoff valve 123 and the second main exhaust gas passage shutoff valve 124 are closed. “Open”. In this state, the exhaust gas is discharged to the atmosphere via the bypass exhaust gas passage 113, the catalyst exhaust gas passage 115, and the second main exhaust gas passage 114, and thus has poor properties in the low load operation state. Exhaust gas is purified by the catalyst.
【００２１】図６は時刻ｔ3 以後の高負荷運転状態（I
V）の排気ガスの流れを示す。即ちバイパス排気ガス流
路遮断弁１２３および還流排気ガス流路遮断弁１２６は
“閉”とされ、第１主排気ガス流路遮断弁１２２および
第２主排気ガス流路遮断弁１２４は“開”とされる。こ
の状態にあっては排気ガスは第１主排気ガス流路１１２
および第２主排気ガス流路１１４を経由して直接大気に
放出される。FIG. 6 is a time t 3 after the high-load operation state (I
V) shows the flow of exhaust gas. That is, the bypass exhaust gas passage shutoff valve 123 and the recirculation exhaust gas passage shutoff valve 126 are closed, and the first main exhaust gas passage shutoff valve 122 and the second main exhaust gas passage shutoff valve 124 are open. It is said. In this state, the exhaust gas is supplied to the first main exhaust gas passage 112.
And, it is directly discharged to the atmosphere via the second main exhaust gas passage 114.
【００２２】高負荷運転状態にあっては排気ガスはクリ
ーンとなるため、触媒で浄化する必要は少ない。In the high load operation state, the exhaust gas is clean, so that there is little need to purify it with a catalyst.
【００２３】[0023]
【発明の効果】以上説明したように本発明にかかるガス
タービンの排気ガス浄化装置によれば、低負荷の排気ガ
スの性状の悪い運転領域において排気ガスが直接大気に
放出されることが防止される。さらに本実施例に示す構
成によれば排気ガス流量の少ない低負荷時以下の運転状
態において触媒で排気ガスを浄化すればよいため、触媒
の処理能力は小であっても足り経済的にも優れている。As described above, according to the exhaust gas purifying apparatus for a gas turbine according to the present invention, it is possible to prevent the exhaust gas from being directly discharged to the atmosphere in the operating region where the properties of the low-load exhaust gas are poor. You. Further, according to the configuration shown in the present embodiment, the exhaust gas may be purified by the catalyst in an operating state where the exhaust gas flow rate is low and the load is low or less, so that the processing capacity of the catalyst is small and sufficient and economical is excellent. ing.
【図１】図１は本発明の実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】図２はガスタービンの起動曲線を示すグラフで
ある。FIG. 2 is a graph showing a startup curve of a gas turbine.
【図３】図３は運転状態（Ｉ）におけるフローシートで
ある。FIG. 3 is a flow sheet in an operation state (I).
【図４】図４は運転状態（II）におけるフローシートで
ある。FIG. 4 is a flow sheet in an operation state (II).
【図５】図５は運転状態 (III)におけるフローシートで
ある。FIG. 5 is a flow sheet in an operation state (III).
【図６】図６は運転状態（IV）におけるフローシートで
ある。FIG. 6 is a flow sheet in an operation state (IV).
１００…ガスタービン １０１…コンプレッサ １０２…排気タービン １０３…軸 １０４…負荷 １０５…燃焼器 １０６…燃料噴射ノズル １１１…排気ガス流路 １１２…第１主排気ガス流路 １１３…バイパス排気ガス流路 １１４…第２主排気ガス流路 １１５…触媒排気ガス流路 １１６…還流排気ガス流路 １２２…第１主排気ガス流路遮断弁 １２３…バイパス排気ガス流路遮断弁 １２４…第２主排気ガス流路遮断弁 １２５…触媒 １２６…還流排気ガス流路遮断弁 １３５…排気ガス温度検出器 REFERENCE SIGNS LIST 100 gas turbine 101 compressor 102 exhaust turbine 103 shaft 104 load 105 combustor 106 fuel injection nozzle 111 exhaust gas channel 112 first main exhaust gas channel 113 bypass exhaust gas channel 114 Second main exhaust gas passage 115 ... Catalyst exhaust gas passage 116 ... Reflux exhaust gas passage 122 ... First main exhaust gas passage shutoff valve 123 ... Bypass exhaust gas passage shutoff valve 124 ... Second main exhaust gas passage Shutoff valve 125 ... Catalyst 126 ... Reflux exhaust gas passage shutoff valve 135 ... Exhaust gas temperature detector
Claims (1)
燃焼させる燃焼器と、 該燃焼器から排出される燃焼ガスによって駆動され該コ
ンプレッサを駆動する排気タービンと、 該排気タービンを駆動した後の排気ガスを浄化するため
の触媒と、 始動時に排気ガスを該コンプレッサの吸気口に直接還流
させる第１の排気ガス流路と、 ガスタービンの始動後に排気ガスで該触媒を暖機するた
めに、該触媒を通過させた後に排気ガスを該コンプレッ
サの吸気口に還流させる第２の排気ガス流路と、 該触媒の暖機完了後に排気ガスを該触媒を通過させるこ
とによって浄化した後に大気に排出する第３の排気ガス
流路と、を備えるガスタービンの排気ガス浄化装置。1. A compressor, a combustor for injecting fuel into air compressed by the compressor and burning it, an exhaust turbine driven by combustion gas discharged from the combustor to drive the compressor, A catalyst for purifying exhaust gas after driving the exhaust turbine; a first exhaust gas flow path for directly returning exhaust gas to an intake port of the compressor at the time of starting; A second exhaust gas flow path for recirculating exhaust gas to an intake port of the compressor after the catalyst has passed to warm up the catalyst; and allowing the exhaust gas to pass through the catalyst after the catalyst has been warmed up. And a third exhaust gas passage for exhausting the exhaust gas to the atmosphere after purification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12893092A JP2903861B2 (en) | 1992-05-21 | 1992-05-21 | Gas turbine exhaust gas purification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12893092A JP2903861B2 (en) | 1992-05-21 | 1992-05-21 | Gas turbine exhaust gas purification equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05321697A JPH05321697A (en) | 1993-12-07 |
| JP2903861B2 true JP2903861B2 (en) | 1999-06-14 |
Family
ID=14996916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12893092A Expired - Fee Related JP2903861B2 (en) | 1992-05-21 | 1992-05-21 | Gas turbine exhaust gas purification equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2903861B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006004468A1 (en) | 2004-07-02 | 2006-01-12 | Volvo Technology Corporation | Internal combustion engine exhaust gas system |
| US8397482B2 (en) * | 2008-05-15 | 2013-03-19 | General Electric Company | Dry 3-way catalytic reduction of gas turbine NOx |
-
1992
- 1992-05-21 JP JP12893092A patent/JP2903861B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05321697A (en) | 1993-12-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |