JPH06229529A - Exhaust gas boiler - Google Patents
Exhaust gas boilerInfo
- Publication number
- JPH06229529A JPH06229529A JP1533393A JP1533393A JPH06229529A JP H06229529 A JPH06229529 A JP H06229529A JP 1533393 A JP1533393 A JP 1533393A JP 1533393 A JP1533393 A JP 1533393A JP H06229529 A JPH06229529 A JP H06229529A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- exhaust gas
- outlet
- dust
- exhaust
- 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.)
- Withdrawn
Links
Landscapes
- Chimneys And Flues (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は酸性硫安等を含むダスト
の飛散防止を図った排ガスボイラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas boiler in which dust containing acidic ammonium sulfate or the like is prevented from scattering.
【０００２】[0002]
【従来の技術】ガスタービン排ガスボイラでは、燃料に
重油を使用する場合には、排出ガス中のＮＯx を低減す
るため、ボイラ内に脱硝装置が設置される。この場合、
排ガス中に還元剤としてアンモニアが供給される。In a gas turbine exhaust gas boiler, when using heavy fuel oil in the fuel, to reduce the NO x in the exhaust gas, denitrification device is installed in the boiler. in this case,
Ammonia is supplied as a reducing agent into the exhaust gas.
【０００３】上記において、ボイラ内に設置された脱硝
装置のガス後流側にあるボイラ低温ゾーン部では、リー
クアンモニアと、燃料の重油中の硫黄分から変化したＳ
Ｏ3とが化合して、酸性硫安（NH4HSO4)が生成され、伝
熱管表面に付着し、またこれを媒体として煤塵も付着す
る。In the above, in the low temperature zone of the boiler on the gas downstream side of the denitration device installed in the boiler, the amount of S changed from the leak ammonia and the sulfur content in the heavy fuel oil is used.
When combined with O 3 , acid ammonium sulfate (NH 4 HSO 4 ) is produced and adheres to the surface of the heat transfer tube, and soot is also adhered to this surface as a medium.
【０００４】[0004]
【発明が解決しようとする課題】伝熱管表面に付着した
酸性硫安を含むダストは、停缶時に冷却されると剥離し
易くなり、ガスタービン再起動時に伝熱管表面から剥離
して多量のガス流と共に煙突から大気中に飛散し、公害
をもたらす。Dust containing acidic ammonium sulfate adhered to the surface of the heat transfer tube easily separates when cooled when the can is stopped, and separates from the surface of the heat transfer tube when the gas turbine is restarted. At the same time, it scatters from the chimney into the atmosphere and causes pollution.
【０００５】本発明は、定常運転時にドラフトロスを生
じることなく、運転再開時の酸性硫安等を含むダストの
大気中への飛散による公害を防止しようとするものであ
る。The present invention is intended to prevent pollution caused by scattering of dust containing acidic ammonium sulfate and the like into the atmosphere at the time of restart of operation without causing draft loss during steady operation.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
したものであって、排気ダクトの出口に設置され同排気
ダクトの出口を開閉するダンパと、前記排気ダクトの周
辺に配置され前記排気ダクトの内部に連通し前記ダンパ
によって排気ダクト出口からの排出を阻止された排出ガ
スを導入してダストを捕集する複数個のサイクロン式集
塵器とからなるダスト集塵装置を備えたことを特徴とす
る排ガスボイラに関するものである。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems and comprises a damper installed at the outlet of an exhaust duct for opening and closing the outlet of the exhaust duct, and the exhaust gas disposed around the exhaust duct. A dust collecting device comprising a plurality of cyclone type dust collectors that communicate with the inside of the duct and introduce the exhaust gas that is prevented from being discharged from the exhaust duct outlet by the damper to collect the dust. The present invention relates to a characteristic exhaust gas boiler.
【０００７】[0007]
【作用】排気ダクトの出口に設置したダンパを、ダスト
量の少ない定常運転時には全開して排出ガスをダクト出
口から直接大気中へ放出する。酸性硫安等を含むダスト
の飛散が多い起動時には、ダンパを全閉して排出ガスを
集塵器へ導びき、ダストを捕集して清浄化した後大気中
へ放出する。定常運転時には、排出ガスをダクト出口か
ら直接大気中へ放出するので、この時はドラフトロスの
発生が防がれる。[Function] The damper installed at the outlet of the exhaust duct is fully opened during steady operation with a small amount of dust, and exhaust gas is discharged directly into the atmosphere from the outlet of the duct. At the time of start-up in which a lot of dust containing acidic ammonium sulfate is scattered, the damper is fully closed to guide the exhaust gas to the dust collector, collect the dust and clean it, and then release it into the atmosphere. During steady operation, the exhaust gas is directly discharged into the atmosphere from the duct outlet, so that draft loss is prevented at this time.
【０００８】[0008]
【実施例】図１は本発明の一実施例に係るガスタービン
排ガスボイラの縦断面図である。図において、１はダク
ト、１ａは同ダクト１の上流側に連るガスタービン出口
ダクト、１ｂは同ダクト１の下流側に連る排気ダクト、
２は同ダクト１の内部に巻回設置されているボイラ伝熱
管、７は同ダクト１内に設置されている脱硝装置、６は
これらダクト等を支持するよう立設された架構である。
ガスタービン出口ダクト１ａより導入されたガスタービ
ン排ガスは脱硝装置７を通過する間に含有ＮＯx を低減
させられ、ボイラ伝熱管２内を流通する冷水に対して熱
交換作用を行った後、排気ダクト１ｂを経て放出され
る。1 is a vertical sectional view of a gas turbine exhaust gas boiler according to an embodiment of the present invention. In the figure, 1 is a duct, 1a is a gas turbine outlet duct connected to the upstream side of the duct 1, 1b is an exhaust duct connected to the downstream side of the duct 1,
Reference numeral 2 is a boiler heat transfer tube installed inside the duct 1, 7 is a denitration device installed in the duct 1, and 6 is a frame installed upright to support these ducts.
The gas turbine exhaust gas introduced from the gas turbine outlet duct 1a is reduced in NO x content while passing through the denitration device 7, and after exchanging heat with the cold water flowing in the boiler heat transfer tube 2, the exhaust gas is discharged. It is discharged through the duct 1b.
【０００９】図において４は排気ダクト１ｂの出口部に
設けられたダンパ、３は同排気ダクトの出口部の周囲に
複数個設けられたサイクロン式集塵器であり、これらに
よってダスト集塵装置が構成されている。５はダスト集
塵装置を覆い上方へ排気するよう立設された煙突であ
る。排気ダクト１ｂを通過した排出ガスは、上記ダスト
集塵装置を経て煙突５より大気中へ放出される。In the figure, 4 is a damper provided at the outlet of the exhaust duct 1b and 3 is a cyclone type dust collector provided around the outlet of the exhaust duct 1b. It is configured. Reference numeral 5 denotes a chimney which covers the dust collecting apparatus and is erected so as to exhaust air upward. The exhaust gas that has passed through the exhaust duct 1b is discharged into the atmosphere from the chimney 5 through the dust collecting device.
【００１０】図２は上記ダスト集塵装置の縦断面図、図
３は図２のＡ−Ａ断面図である。図において、３はサイ
クロン式集塵器であり、一般に複数個設けられるが、図
３に示されるように、本実施例のダスト集塵装置におい
ては、同集塵器３が８個設けられている。３ａはサイク
ロン、３ｂは同サイクロンの下部に設けられている集塵
室、３ｃは上記サイクロンへの排出ガス（ダストを含
む）の入口部、３ｄは排ガス出口管、３ｅは集塵室３ｂ
の下部に設けられた集塵取出口である。これらの符号３
ａ〜３ｅを付した部分によってサイクロン式集塵器３が
構成されている。FIG. 2 is a vertical sectional view of the dust collecting apparatus, and FIG. 3 is a sectional view taken along line AA of FIG. In the figure, reference numeral 3 denotes a cyclone type dust collector, and generally, a plurality of dust collectors 3 are provided, but as shown in FIG. 3, in the dust dust collector of this embodiment, eight dust collectors 3 are provided. There is. 3a is a cyclone, 3b is a dust collecting chamber provided at the lower part of the cyclone, 3c is an inlet of exhaust gas (including dust) to the cyclone, 3d is an exhaust gas outlet pipe, 3e is a dust collecting chamber 3b
It is a dust collection outlet provided in the lower part of. These code 3
The cyclone type dust collector 3 is constituted by the portions a to 3e.
【００１１】上記装置において、ダンパ４を開いた時に
は、排出ガスは煙突を経て大気中へ直接放出される。ダ
ンパ４を閉じた時には、排気ダクト１ｂを通過する排出
ガスは入口部３ｃより各サイクロン３ａ内へ導入され
る。そこでガス中のダスト（前記酸性硫安等）が捕集さ
れた後、ガスは出口管３ｄを経て煙突５より大気中へ放
出される。捕集され集塵室３ｂに溜ったダストは集塵取
出し口３ｅより取出し廃棄される。In the above device, when the damper 4 is opened, the exhaust gas is directly discharged into the atmosphere through the chimney. When the damper 4 is closed, the exhaust gas passing through the exhaust duct 1b is introduced into each cyclone 3a through the inlet portion 3c. Then, after the dust in the gas (the acidic ammonium sulfate, etc.) is collected, the gas is discharged from the chimney 5 into the atmosphere through the outlet pipe 3d. The dust collected and collected in the dust collection chamber 3b is taken out from the dust collection outlet 3e and discarded.
【００１２】前述のように、ガスタービンの燃料に重油
を使用する場合は、特に重油中の硫黄分から変化したＳ
Ｏ3 と脱硝装置７に使用するアンモニヤ（リーク分）と
が化合して酸性硫安（NH4HSO4)が生成され、これが伝熱
管２の表面に付着し、またこれを媒体として煤塵が付着
する。伝熱管２表面に付着した酸性硫安等のダストは停
缶時等に冷却されると剥離し易くなり、運転再開時に管
表面から剥離して排出ガスと共に大気中へ飛散する。通
常運転に入ると剥離する量も少なく、またダスト粒径も
小さい。As described above, when heavy oil is used as the fuel for the gas turbine, the S content changed from the sulfur content in the heavy oil.
O 3 and the ammonia used in the denitration device 7 (leakage) are combined to produce acidic ammonium sulfate (NH 4 HSO 4 ), which adheres to the surface of the heat transfer tube 2 and also dust as a medium. . Dust such as acidic ammonium sulfate adhered to the surface of the heat transfer tube 2 easily peels off when cooled when the can is stopped, etc., and peels off from the surface of the tube when the operation is restarted and scatters into the atmosphere together with the exhaust gas. In normal operation, the amount of peeling is small and the dust particle size is also small.
【００１３】そこで、通常運転時には、前記ダンパ４を
全開する。すると、排気ダクト１ｂを通過する排出ガス
は集塵器３側へは流れず、全量が直接ダクト出口より大
気中へ放出される。従って運転上のドラフトロスの増加
に伴うガスタービン側の出力低下が発生せず、効率的な
運転が行われる。Therefore, during normal operation, the damper 4 is fully opened. Then, the exhaust gas passing through the exhaust duct 1b does not flow to the dust collector 3 side, and the entire amount is directly discharged from the duct outlet into the atmosphere. Therefore, the output decreases on the gas turbine side due to the increase of the draft loss during the operation, and the efficient operation is performed.
【００１４】一方、停缶後、運転を再開する際は、前記
ダンパ４を全閉する。すると、排気ダクト１ｂを通過す
る排出ガスは全量が入口部３ｃよりサイクロン３ａ内へ
導入され、ここで伝熱管２の表面から剥離した酸性硫安
等の排気ガス中のダクトが捕集され、こうして清浄化さ
れた排出ガスは出口管３ｄを経て煙突５から大気中に放
出される。また、運転再開後所定時間が経過して通常運
転に入り、ガス中のダスト量が少なくなったらダンパ４
を全開し、排出ガス全量をダクト出口から直接大気中へ
放出する。On the other hand, when restarting the operation after stopping the can, the damper 4 is fully closed. Then, all the exhaust gas passing through the exhaust duct 1b is introduced into the cyclone 3a through the inlet portion 3c, where the duct in the exhaust gas such as acidic ammonium sulfate separated from the surface of the heat transfer tube 2 is collected and thus cleaned. The converted exhaust gas is discharged into the atmosphere from the chimney 5 through the outlet pipe 3d. Also, when a predetermined time has passed after the operation was restarted and normal operation was started, and the amount of dust in the gas decreased, the damper 4
Is fully opened, and all the exhaust gas is discharged directly into the atmosphere from the duct outlet.
【００１５】以上詳細に説明したように、本実施例のダ
スト集塵器においては、排気ダクトの出口部に設けたダ
ンパを、ガス中のダスト量が少なく粒径も小さい通常運
転時には全開して排出ガスをダクト出口から直接大気中
に放出し、一方ガス中に酸性硫安等のダスト量の多い停
缶後の運転再開時には全閉し、排出ガス全量を集塵器へ
導入してダストを捕集し、清浄化したガスを大気中へ放
出するようにしたので、公害防止効果が大きく、また、
運転上のドラフトロス、出力低下等も発生しない。更に
ダンパの操作は遠隔操作手段を用いることによって容易
に行うことができる。As described in detail above, in the dust collector of this embodiment, the damper provided at the outlet of the exhaust duct is fully opened during normal operation in which the amount of dust in the gas is small and the particle size is small. The exhaust gas is discharged directly into the atmosphere from the duct outlet, while it is fully closed when the operation is restarted after the can is stopped with a large amount of dust such as acidic ammonium sulfate, and the entire exhaust gas is introduced into the dust collector to capture the dust. Since the collected and purified gas is released into the atmosphere, it has a great effect of preventing pollution.
Draft loss in driving and output reduction will not occur. Further, the damper can be easily operated by using the remote control means.
【００１６】[0016]
【発明の効果】本発明の排ガスボイラは、排気ダクトの
出口に設置され同排気ダクトの出口を開閉するダンパ
と、前記排気ダクトの周辺に配置され前記排気ダクトの
内部に連通し前記ダンパによって排気ダクト出口からの
排出を阻止された排出ガスを導入してダストを捕集する
複数個のサイクロン式集塵器とからなるダスト集塵装置
を備えているので、定常運転時にドラフトロスを生じる
ことなく、運転再開時の酸性硫安等を含むダストの大気
中への飛散を防ぎ、公害を防止することができる。The exhaust gas boiler of the present invention has a damper installed at the outlet of the exhaust duct for opening and closing the outlet of the exhaust duct, and a damper arranged around the exhaust duct and communicating with the inside of the exhaust duct to exhaust the exhaust gas. Equipped with a dust collector consisting of a plurality of cyclone type dust collectors that collect the dust by introducing the exhaust gas that is blocked from being discharged from the duct outlet, so there is no draft loss during steady operation. Also, it is possible to prevent dust containing acidic ammonium sulfate, etc. from scattering into the atmosphere when the operation is restarted, and to prevent pollution.
【図１】本発明の一実施例に係るガスタービン排ガスボ
イラの縦断面図。FIG. 1 is a vertical cross-sectional view of a gas turbine exhaust gas boiler according to an embodiment of the present invention.
【図２】上記実施例のダスト集塵装置の縦断面図。FIG. 2 is a vertical sectional view of the dust collecting apparatus of the above embodiment.
【図３】図２のＡ−Ａ断面（横断面）図。3 is a cross-sectional view (cross section) taken along the line AA of FIG.
１ ダクト １ａ ガスタービン出口ダクト １ｂ 排気ダクト ２ ボイラ伝熱管 ３ 集塵器 ３ａ サイクロン ３ｂ 集塵室 ３ｃ 入口部 ３ｄ 出口管 ３ｅ 集塵取出口 ４ ダンパ ５ 煙突 ６ 架構 ７ 脱硝装置 1 Duct 1a Gas Turbine Exit Duct 1b Exhaust Duct 2 Boiler Heat Transfer Tube 3 Dust Collector 3a Cyclone 3b Dust Collection Chamber 3c Inlet 3d Outlet Pipe 3e Dust Collection Outlet 4 Damper 5 Chimney 6 Frame 7 Denitration Device
Claims (1)
トの出口を開閉するダンパと、前記排気ダクトの周辺に
配置され前記排気ダクトの内部に連通し前記ダンパによ
って排気ダクト出口からの排出を阻止された排出ガスを
導入してダストを捕集する複数個のサイクロン式集塵器
とからなるダスト集塵装置を備えたことを特徴とする排
ガスボイラ。1. A damper installed at the outlet of the exhaust duct to open and close the outlet of the exhaust duct, and a damper arranged around the exhaust duct and communicating with the inside of the exhaust duct to prevent exhaust from the outlet of the exhaust duct. An exhaust gas boiler, comprising: a dust collecting device including a plurality of cyclone type dust collectors for collecting the dust by introducing the discharged exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1533393A JPH06229529A (en) | 1993-02-02 | 1993-02-02 | Exhaust gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1533393A JPH06229529A (en) | 1993-02-02 | 1993-02-02 | Exhaust gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06229529A true JPH06229529A (en) | 1994-08-16 |
Family
ID=11885861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1533393A Withdrawn JPH06229529A (en) | 1993-02-02 | 1993-02-02 | Exhaust gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06229529A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002129984A (en) * | 2000-10-30 | 2002-05-09 | Ishikawajima Harima Heavy Ind Co Ltd | White smoke prevention method and apparatus for gas turbine equipment |
| JP2017166334A (en) * | 2016-03-14 | 2017-09-21 | Ｊｆｅスチール株式会社 | Operation method in starting gas turbine, and exhaust gas passage device of gas turbine |
| KR20220009703A (en) * | 2020-07-16 | 2022-01-25 | 한국지역난방공사 | Removal device of iron oxide particle in power plant flue gas |
-
1993
- 1993-02-02 JP JP1533393A patent/JPH06229529A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002129984A (en) * | 2000-10-30 | 2002-05-09 | Ishikawajima Harima Heavy Ind Co Ltd | White smoke prevention method and apparatus for gas turbine equipment |
| JP2017166334A (en) * | 2016-03-14 | 2017-09-21 | Ｊｆｅスチール株式会社 | Operation method in starting gas turbine, and exhaust gas passage device of gas turbine |
| KR20220009703A (en) * | 2020-07-16 | 2022-01-25 | 한국지역난방공사 | Removal device of iron oxide particle in power plant flue gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000404 |