JPS6354961B2 - - Google Patents
Info
- Publication number
- JPS6354961B2 JPS6354961B2 JP54137713A JP13771379A JPS6354961B2 JP S6354961 B2 JPS6354961 B2 JP S6354961B2 JP 54137713 A JP54137713 A JP 54137713A JP 13771379 A JP13771379 A JP 13771379A JP S6354961 B2 JPS6354961 B2 JP S6354961B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- sent
- boiler
- steam
- control box
- 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
Links
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
【発明の詳細な説明】
この発明は流動層ボイラをタービントリツプ等
の場合緊急停止する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for emergency stopping a fluidized bed boiler in the event of a turbine trip or the like.
近時石油事情の逼迫に伴い石炭の使用が見直さ
され、石炭燃焼を流動層でする努力がされてお
り、流動層ボイラを発電用に使用した時に生ずる
問題につき検討されている。この場合流動層ボイ
ラ固有の問題の一つとして、従来の重油等と異な
り、燃料の遮断をしても流動層内で燃焼している
石炭粒は継続して燃焼し、流動媒体の保有する熱
量により層内の温度低下速度は鈍いものであり、
層内伝熱管の保護とその保護のためにする冷却水
の供給により発生する蒸気の処理とを必要とす
る。そのためより急速に層中温度を低下させる手
段が要望されるものである。 With the recent tightening of the oil situation, the use of coal has been reconsidered, and efforts are being made to burn coal in fluidized beds, and problems that arise when fluidized bed boilers are used for power generation are being studied. In this case, one of the problems unique to fluidized bed boilers is that unlike conventional heavy oil, etc., even if the fuel is cut off, the coal grains burning in the fluidized bed will continue to burn, and the amount of heat held by the fluidized bed will continue to burn. Therefore, the rate of temperature decrease in the layer is slow,
It is necessary to protect the intralayer heat exchanger tubes and to treat the steam generated by supplying cooling water to protect them. Therefore, there is a need for a means to more rapidly lower the temperature in the layer.
この発明は流動層ボイラを緊急停止する方法を
提案することを目的とする。 The purpose of this invention is to propose a method for emergency shutdown of a fluidized bed boiler.
要するにこの発明は流動層ボイラの緊急停止の
指令信号を受け、燃料のボイラへの供給の急速停
止、燃焼用空気の停止によるO2の供給停止、流
動を保持しつつ燃焼を抑制する不活性ガスの供給
をし同時に流動媒体の冷却をもはかることを特徴
とする。 In short, this invention receives a command signal for emergency shutdown of a fluidized bed boiler, rapidly stops the supply of fuel to the boiler, stops the supply of O2 by stopping combustion air, and uses inert gas to suppress combustion while maintaining fluid flow. It is characterized by supplying fluid and cooling the fluid medium at the same time.
この発明にかかる装置の構造を以下図面により
説明する。符号１は流動層ボイラで、多孔板２で
仕切りされた下部の空気室３には送風機４から燃
焼と流動用の空気が供給され、砂等の流動媒体よ
りなる流動層５内で石炭の粉細粒は燃焼する。送
風機４からの空気を管路６に送りダンパ６ａを経
由後、粉細粒石灰石ホツパ７、二重ロータリフイ
ーダ７ａを経由して供給される粉細粒石灰石を管
路６内を気流輸送し、ついで粉細粒炭ホツパ８、
二重ロータリフイーダ８ａを経由して供給される
粉細粒炭と混合して、分配装置９より流動層に燃
料として供給する。符号１０ａは流動層内の蒸発
管、１０ｂ，１０ｃは排ガス流路内に設けた蒸発
管である。発生した蒸気はドラム１１に送られ、
その蒸気は過熱器１２、主蒸気管１３、主塞止弁
１４を経由しタービン等に送られる。給水は給水
ポンプ１５よりエコノマイザ１６を経由してドラ
ム１１に供給される。タービン等からの信号１７
又は主蒸気管路１３に設けた蒸気流量発信器１８
の信号１９は制御箱２０に送られる。 The structure of the device according to the present invention will be explained below with reference to the drawings. Reference numeral 1 designates a fluidized bed boiler, in which air for combustion and fluidization is supplied from a blower 4 to a lower air chamber 3 partitioned by a perforated plate 2, and coal powder is heated in a fluidized bed 5 made of a fluidized medium such as sand. Fine particles burn. The air from the blower 4 is sent to the pipe line 6 through the damper 6a, and then the powder fine limestone supplied via the powder fine limestone hopper 7 and the double rotary feeder 7a is air-flow-transported inside the pipe line 6. , then powdered fine charcoal hopper 8,
It is mixed with pulverized granulated coal supplied via the double rotary feeder 8a and supplied as fuel to the fluidized bed from the distribution device 9. Reference numeral 10a is an evaporation tube in the fluidized bed, and 10b and 10c are evaporation tubes provided in the exhaust gas flow path. The generated steam is sent to the drum 11,
The steam is sent to a turbine etc. via a superheater 12, a main steam pipe 13, and a main blocking valve 14. Water is supplied to the drum 11 from a water pump 15 via an economizer 16. Signal 17 from turbine etc.
Or a steam flow rate transmitter 18 provided in the main steam pipe line 13
The signal 19 is sent to the control box 20.
この発明において、流動層ボイラ１を緊急停止
する信号として信号１７、又は１９が制御箱２０
に送られ、この制御箱２０からの指令信号はダン
パ６ａ、燃焼用空気供給管路２１のダンパ２２、
二重ロータリフイーダ７ａ，８ａに夫々送られ、
燃料の供給、燃焼用空気の供給を停止する。 In this invention, the signal 17 or 19 is sent to the control box 20 as a signal for emergency stop of the fluidized bed boiler 1.
The command signal from the control box 20 is sent to the damper 6a, the damper 22 of the combustion air supply pipe 21,
are sent to double rotary feeders 7a and 8a, respectively,
Stop fuel supply and combustion air supply.
これと同時にドラム１１と空気室３とを接続す
る管路２３に設けた蒸気止弁２４を制御箱２０か
らの信号２５により開とし蒸気を不活性ガスとし
て空気室３に送る。流動層５は850〜950℃に保た
れているのでドラム１１内の蒸気は飽和蒸気であ
ることから層内温度よりは遥かに低く、流動層５
の冷却をも有効に行なうものである。もとより
O2を含まぬことにより燃料の燃焼をほとんど停
止することとなる。 At the same time, a steam stop valve 24 provided in a conduit 23 connecting the drum 11 and the air chamber 3 is opened by a signal 25 from the control box 20, and steam is sent to the air chamber 3 as an inert gas. Since the fluidized bed 5 is maintained at a temperature of 850 to 950°C, the steam in the drum 11 is saturated steam, which is much lower than the temperature inside the bed.
It also effectively cools the air. From the beginning
By not including O 2 , combustion of the fuel is almost stopped.
またこれに代り不活ガス例えば炭酸ガス
（CO2）又は窒素ガス（N2）のボンベ２６と空気
室３を結ぶ管路２３ａに設けた弁２７を制御箱２
０からの信号２８により開とし、不活性ガスを空
気室３に急送供給することもできる。 In addition, instead of this, a valve 27 provided in a pipe 23a connecting a cylinder 26 of an inert gas such as carbon dioxide gas (CO 2 ) or nitrogen gas (N 2 ) and the air chamber 3 is installed in the control box 2.
It can also be opened by a signal 28 from 0 to suddenly supply inert gas to the air chamber 3.
この発明を実施することにより、流動層内の燃
焼は急激に停止に向い、かつ層内温度も低下する
ので蒸発管等は損傷することなく急速なボイラ停
止をすることができるという効果を奏するもので
ある。 By carrying out this invention, the combustion in the fluidized bed is rapidly stopped, and the temperature in the bed is also lowered, so that the boiler can be stopped quickly without damaging the evaporator tube, etc. It is.
第１図はこの発明の実施にかかる装置の配管と
制御系統を示す図面である。
１…流動層ボイラ、４…送風機、６ａ…ダン
パ、７…粉細粒石灰石ホツパ、８…粉細粒炭ホツ
パ、１４…主塞止弁、２０…制御箱、２２…ダン
パ、２３…管路、２４…蒸気止弁、２６…不活性
ガスのボンベ、２７…弁。
FIG. 1 is a drawing showing the piping and control system of an apparatus according to the present invention. 1...Fluidized bed boiler, 4...Blower, 6a...Damper, 7...Powdered fine limestone hopper, 8...Powdered fine coal hopper, 14...Main blocking valve, 20...Control box, 22...Damper, 23...Pipe line , 24... Steam stop valve, 26... Inert gas cylinder, 27... Valve.
Claims (1)
止の負荷信号を制御箱に送り、その制御箱からの
指令信号により燃料の供給の停止と、燃焼用空気
の供給停止と、流動層空気室へボイラドラム内蒸
気の急送とをして層内の燃焼抑制と層内温度低下
をさせ運転の停止をすることを特徴とする流動層
ボイラの緊急停止方法。 ２ 不活性ガス溜めより不活性ガスを供給するこ
とを特徴とする特許請求の範囲第１項記載の流動
層ボイラの緊急停止方法。[Claims] 1. A load signal for emergency stop of a fluidized bed boiler having heat transfer tubes in the layer is sent to a control box, and a command signal from the control box is used to stop the supply of fuel and the supply of combustion air. A method for emergency shutdown of a fluidized bed boiler, characterized in that the steam in the boiler drum is rapidly sent to the fluidized bed air chamber to suppress combustion in the bed and lower the temperature in the bed, thereby stopping the operation. 2. The method for emergency shutdown of a fluidized bed boiler according to claim 1, characterized in that inert gas is supplied from an inert gas reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13771379A JPS5661506A (en) | 1979-10-26 | 1979-10-26 | Emergency stopping of fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13771379A JPS5661506A (en) | 1979-10-26 | 1979-10-26 | Emergency stopping of fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5661506A JPS5661506A (en) | 1981-05-27 |
| JPS6354961B2 true JPS6354961B2 (en) | 1988-10-31 |
Family
ID=15205076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13771379A Granted JPS5661506A (en) | 1979-10-26 | 1979-10-26 | Emergency stopping of fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5661506A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE459988B (en) * | 1987-12-23 | 1989-08-28 | Abb Stal Ab | COULD COOL BEDDING MATERIAL IN A PFBC POWER PLANT AND PFBC POWER PLANT WITH A REFRIGERATOR CONNECTED TO THE BEDDER |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4949001A (en) * | 1972-09-18 | 1974-05-13 | ||
| JPS53148165A (en) * | 1977-05-30 | 1978-12-23 | Ebara Corp | Method of incinerating in fluidized bed incinerator and incinerator therefor |
-
1979
- 1979-10-26 JP JP13771379A patent/JPS5661506A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5661506A (en) | 1981-05-27 |
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