JPS5989924A - Inlet air pressure control device of fluidized bed boiler - Google Patents

Inlet air pressure control device of fluidized bed boiler

Info

Publication number
JPS5989924A
JPS5989924A JP57198373A JP19837382A JPS5989924A JP S5989924 A JPS5989924 A JP S5989924A JP 57198373 A JP57198373 A JP 57198373A JP 19837382 A JP19837382 A JP 19837382A JP S5989924 A JPS5989924 A JP S5989924A
Authority
JP
Japan
Prior art keywords
inlet
boiler
air pressure
pressure
inlet 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.)
Pending
Application number
JP57198373A
Other languages
Japanese (ja)
Inventor
Junichi Kusunoki
楠　純一
Masayuki Ishigane
石金　正之
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP57198373A priority Critical patent/JPS5989924A/en
Publication of JPS5989924A publication Critical patent/JPS5989924A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/02—Measuring filling height in burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

PURPOSE:To contrive the reducing of an electric power and the improvement of controllability of an inlet damper by a method wherein a driving motor of a forced blower is controlled at desired number of revolutions, and an air pressure at the inlet of a boiler is varied according to a operational condition of the boiler. CONSTITUTION:Signals outputted from a boiler inlet air pressure setting devices 13, 14 due to a master command 12 are selected with a changeover controller 15 according to the operation, that is, single shell operation or both shell operation, further, a signal is inputted into a velocity controller 11 via a pressure controller 16, then the rotational speed of a driving motor 4 is controlled. The signals outputted by the master command 12 from boiler inlet air flow rate setting devices 18, 19 correspond to each shell 1, 2 are introduced into open/close driving devices 22, 23 via air flow rate controllers 20, 21, then inlet dampers 9, 10 are opened or closed. Thereby, the reducing of an electric power and the improvement of controllability of an inlet dampers can be contrived.

Description

【発明の詳細な説明】 装置に関する。[Detailed description of the invention] Regarding equipment.

第１図は２つのセル（α）（ｂ）を備えた流動床ボイラ
の一例を示すもので、押込送風機（ｃ）からの空気を、
途中にガスエアーヒーター（ｄ）を備えた主送風管（ｅ
ｉ及び分岐管（１）　（ｇ）を介して前記流動床ボイラ
の各セル（α）（ｂ）に供給するようにしており、また
流動床ボイラから出た排ガスを排ガス管ｆｈ）を介して
前記ガスエアーヒーター（ｄ）に導き、前記供，給空気
の予熱を行うようにしている。Figure 1 shows an example of a fluidized bed boiler equipped with two cells (α) and (b), in which air from a forced air blower (c) is
Main air pipe (e) with gas air heater (d) in the middle
i and branch pipes (1) (g) to each cell (α) (b) of the fluidized bed boiler, and the exhaust gas discharged from the fluidized bed boiler is supplied through the exhaust gas pipe (fh). The supplied air is guided to the gas air heater (d) to preheat the supplied air.

このような流動床ボイラにおける従来の空気圧力の制御
は、押込送風機（ｃｌの駆動モータ（ｉ）を一定速度で
作動させ、且つ前記押込送風３８（ｃ）の下流側に主タ
ンパ（ｊｌ及び圧力検出器（ｋｌを設け、前記セル（α
）（ｂ）に供給される全体空気圧が常に一定に保たれる
よう前記圧力検出器（＆）からの検出値に基づき圧力調
節器（１）を介．して前記主タンパ（ｊｌの開度調整を
行うようにしており、捷た、前記分岐管（ｆ）（ｇ）の
夫々には人口ダンパ（７＋１１　（ｎｌを設け、該人口
ダンパ（慴）（？Ｌ）をマスク指令（ｏ）により別個に
開ｊＷ調整するようにしている。Conventional air pressure control in such a fluidized bed boiler involves operating the drive motor (i) of the forced air blower (cl) at a constant speed, and installing a main tamper (jl and pressure) downstream of the forced air blower (c). A detector (kl is provided and the cell (α
) (b) via the pressure regulator (1) based on the detected value from the pressure detector (&) so that the overall air pressure supplied to the air pressure sensor (&) is always kept constant. The opening degree of the main tamper (jl) is adjusted by adjusting the opening of the main tamper (jl), and an artificial damper (7+11 (nl) is provided for each of the branch pipes (f) and (g), and the artificial damper (jl) is ?L) is separately opened and adjusted by a mask command (o).

しかし」二記従来方式においては、主タンパ（ｊ）と人
口ダンパ（ｍｌ　（ｔｔ）が別個に制御されており・且
つ主タンパ（フ）を経た空気は常に一定の高い圧力（高
負荷状態）にセソトされているため、人口ダンパ（−１
７１３　（ｎ）を絞って低負荷運転しようとした場合、
或いは人口ダンパ（−）ｆ＝＝）の一方を遮断して片セ
ル運転のようなセル運転方式を採った場合は、」＝　；
）：風管（ｅ）内圧力が」二昇するために主タンパ（ｊ
）が絞られ、よって押込送風機（ｃ）の、駆動モータ（
リに無駄に大きな負荷が掛ることになり、低負荷運転が
不可能になったり、所内動力の増大をまねくといった問
題がある。また、特に低負荷運転時において各セル（ａ
、）（ｂ）の入口圧力の調整を行う際には、人口ダンパ
＆、）　（、）を僅かに変化させただけで圧力が大幅に
変化するため、微調整が離しく制御性が悪いという問題
を有していた。However, in the conventional method described in Section 2, the main tamper (j) and the artificial damper (ml (tt)) are controlled separately, and the air that passes through the main tamper (f) is always at a constant high pressure (high load state). population damper (-1
713 (n) and try to operate at low load,
Or, if one side of the artificial damper (-)f==) is shut off and a cell operation method such as single-cell operation is adopted, ``=;
): Main tamper (j
) is throttled, so that the drive motor (
This results in problems such as an unnecessarily large load being placed on the plant, making low-load operation impossible, and causing an increase in internal power. In addition, especially during low load operation, each cell (a
When adjusting the inlet pressure of ,)(b), the pressure changes significantly with a slight change in the artificial damper &,) (,), so fine adjustment is difficult and controllability is poor. I had a problem.

本発明は、こ・うした従来方式のもつ問題点を解決すべ
くなしたもので、押込送風機の駆動モータをマスク指令
により回転数制御して、ボイラの入口空気圧力をボイラ
の運転条件に応じて変化さぜることにより、所内動力の
低減、及び入口ダンパの開側１性の向上を図るようにし
たものである。The present invention was made in order to solve the problems of the conventional method.The rotation speed of the drive motor of the forced blower is controlled by a mask command, and the air pressure at the inlet of the boiler is adjusted according to the operating conditions of the boiler. By varying this, it is possible to reduce the internal power and improve the opening property of the inlet damper.

以下本発明の実施例を図面を参照して説明する０ 第２図は前記第１図の流動床ボイラに適用した本発明の
一例を示すもので、図中（１１（２＋はセル、（３）は
押込送風機、（４）は駆動モータ、（５）は主送風管、
（６）はガスエアーヒーター、（７）（８）は分岐管、
（９）αｑは入口ダンパを示す〇 上記構成において、前記駆動モータ（４）に速度制御装
置（１１）を設け、且つマスク指令０才により出力する
片セル運転用ボイラ人口空気圧力設定器（１３及び両セ
ル運転用ボイラ入ロ空気圧力設定器０４）からの（Ｓ→
−じを切換制御器Ｑつを介して切換選択し、その選択さ
れた信号を圧力調節器αＧを介して前記速度側１ｆｌｌ
ｌ装置（旬に入力し、且つ主送風管（５）内圧力が所定
値にあるかどうかを検出するため主送風管（５）　ＶＣ
圧力検出器（１７）を設け、該圧力検出器α力の検出信
号を前記圧力調節器００に入力してボイラ入口圧力が當
に目的値にあるように駆動モータ（４）の回転速度を制
御１１１するようＩ”１゛６成する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an example of the present invention applied to the fluidized bed boiler shown in FIG. ) is the forced air blower, (4) is the drive motor, (5) is the main air pipe,
(6) is a gas air heater, (7) and (8) are branch pipes,
(9) αq indicates an inlet damper In the above configuration, the drive motor (4) is provided with a speed control device (11), and a boiler artificial air pressure setting device (13) for single-cell operation that is output by the mask command and (S→
- the same is switched and selected via the switching controller Q, and the selected signal is sent to the speed side 1fll via the pressure regulator αG.
l device (main air pipe (5) VC to detect whether the internal pressure of the main air pipe (5) is at a predetermined value.
A pressure detector (17) is provided, and a detection signal of the α force of the pressure detector is input to the pressure regulator 00 to control the rotational speed of the drive motor (4) so that the boiler inlet pressure is at the target value. 111, I"1"6 is created.

また、前記マスク指令＠により、各セル（１１（２１に
おける入口空気流量を別個に設定出力するボイラ入口空
気流量設定器ａ８）（鴎からの信号を各々空気＃ｒ、量
調節器（イ）Ｑυに導入し、該至急流量調節器は）ＣＤ
からの信号により各人口ダンパ（９）叫の開閉駆動装置
ｋ（イ）（ホ）を制御し、１つ各分岐管（７）　（８１
内の空気流量が所定値になっているかどうかを検出する
ために流量計（至）（ハ）を各分岐管（７）（８）に設
け、各流量計（ハ）（ハ）の検出信号を前記空気流量調
節器（ホ）＠１）Ｋ入力して各セル（１１（２１への供
給空気流量が目的値になるよう制御する如く構成する。In addition, according to the mask command @, each cell (11 (boiler inlet air flow rate setting device a8 that separately sets and outputs the inlet air flow rate in 21) (signal from the seagull) is transmitted to the air #r, the amount regulator (a) Qυ and the urgent flow regulator is) CD
The opening/closing drive devices k (a) and (e) of each artificial damper (9) are controlled by the signal from each branch pipe (7) (81).
Flowmeters (to) (c) are installed in each branch pipe (7) and (8) to detect whether the air flow rate within the pipe is at a predetermined value. is input to the air flow rate regulator (e)@1)K to control the air flow rate supplied to each cell (11 (21) to a target value.

上記構成によれば、マスク指令（２）により出力するボ
イラ入口空気圧力設定器（＋３　（１４）からの信号が
、片セル運転成いは両セル運転の運転状態に応じて切換
制御器αのにより選択され、更にその信号が圧力調節器
００を介し速度制御器（【υに入力されて駆動モータ（
４）の回転速度制御を行うようにしているので、マスク
指令αつによるボイラの負荷状態及びセルの運転状態に
応じた圧力となるようにボイラ人口空気圧力を制御する
ことができる。またこのとき、圧力検出器０７）のフィ
ードバック制御により確実な圧力調整が行われる。According to the above configuration, the signal from the boiler inlet air pressure setting device (+3 (14)) output by the mask command (2) is applied to the switching controller α according to the operating state of one cell operation or both cell operation. The signal is then input to the speed controller ([υ) via the pressure regulator 00 to drive the drive motor (
Since the rotational speed control described in 4) is performed, the boiler artificial air pressure can be controlled to a pressure that corresponds to the boiler load state and cell operating state based on the mask command α. Also, at this time, reliable pressure adjustment is performed by feedback control of the pressure detector 07).

捷た、マスク指令０功により出力する各セル（１）（２
）に対応したボイラ入口空気流量設定器（至）０１勤か
らの信号を、各空気流量調節器翰Ｑ］）を介して開閉駆
動装置機（イ）に尋人し、人口ダンパ（９）　Ｑ（Ｉｔ
の開閉を行わせる。こめとき′、片セル運転の場合には
入口ダンパ（９１（１０の一方が閉じられ、他方は流量
計（財）又は（ハ）のフィードバック信号によりマスク
指令０オの負荷に応じた空気流量となるよう開度制御が
行わＡする。また両セル運転時における負、ｉｊｉ変動
時は、ボイラ入口空気圧力がそれに応じＣ変化するので
入口ダンパ（９１ＱＧは殆んど動か′Ｊ”　＋１４安が
ない。更に、ボイラ入口空気圧力は各セル（１）　（２
１人「１の空気流量と関連づけられて制御されているの
で、入口ダンパ（９）αＯを大きく回動させて制（ａｌ
ｊする必要はなく、シかもその回動により極めて高精度
の制御を行うことができ、制御性の向上が図れ、しかも
駆動モータ（４）　Ｋ無駄な負荷が則ることもないので
、効率良く低い所内動力で運転することができる。Each cell (1) (2) output by mask command 0 effect
) The signal from the boiler inlet air flow rate setting device (to) 01 shift corresponding to the boiler inlet air flow rate setting device (to) is sent to the opening/closing drive device (a) via each air flow rate regulator (Q)), and the artificial damper (9) Q (It
to open and close. In the case of single-cell operation, one of the inlet dampers (91 (10) is closed, and the other is controlled to adjust the air flow rate according to the load of the mask command 0 by the feedback signal of the flowmeter (goods) or (c). Opening control is performed to ensure that A.Also, when negative and ij fluctuations occur during both cell operation, the boiler inlet air pressure changes accordingly, so the inlet damper (91QG) hardly moves. .Furthermore, the boiler inlet air pressure is
Since it is controlled in relation to the air flow rate of 1 person, the inlet damper (9) αO is largely rotated to control (al
There is no need to rotate the drive motor (4), and extremely high precision control can be achieved through its rotation, improving controllability.Moreover, there is no unnecessary load on the drive motor (4). Can be operated with low internal power.

同、本発明は」二記実施例にのみ限定されるものではな
く、本発明の要旨を逸脱しない範囲内において種々の変
更を加え得るものである。Similarly, the present invention is not limited only to the above-described two embodiments, and various changes may be made without departing from the gist of the present invention.

上述した本発明の流動床ボイラの入ロ空気圧力制１ｊｌ
ｌ装置によれば、下記の如き晴れた効果を奏し、得る。Inlet air pressure control of the fluidized bed boiler of the present invention described above 1jl
According to this device, the following advantages can be obtained.

（１）低負荷運転が安定して可能となる。(1) Stable low-load operation is possible.

（ｔｉ）　ボイラの負荷条件等に応じてボイラ入口空気
圧力が制御されるので、押込送風機の駆動モータに無駄
な負荷が作用するこ七がなく、低い所内動力で運転でき
る。(ti) Since the boiler inlet air pressure is controlled according to the boiler load conditions, etc., there is no unnecessary load acting on the drive motor of the forced blower, and it can be operated with low internal power.

（ｉｉｉ）人ロダンバの大きな回動調整の必要がなくな
り、しかも回動による制御精度が向上されるので、制御
性の向上が図れる。(iii) It is not necessary to make a large rotational adjustment of the human rodan bar, and control accuracy by rotation is improved, so that controllability can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来方式の一例を示す説明図、第２図は本発明
の一実施例を示す説明図である１゜（Ｌｌ　（２１はセ
ル、（３）は押込送風機、（４）は駆動モータ、（５）
は主送風管、（７１（＆ｌは分岐管、（９）　ＱＯ＋は
人１」ダンパ、０υは速度制御装置、ａ々はマスク指令
、（Ｉ６１は圧力調節器、＋２０１　Ｃ２υは空気流量
調節器を示す。Fig. 1 is an explanatory diagram showing an example of a conventional method, and Fig. 2 is an explanatory diagram showing an embodiment of the present invention. Motor, (5)
is the main air pipe, (71 (&l) is the branch pipe, (9) QO+ is the person 1 damper, 0υ is the speed control device, a are the mask commands, (I61 is the pressure regulator, +201 C2υ is the air flow regulator) show.

Claims (1)

【特許請求の範囲】[Claims] １）押込送風機の駆動モータに速度制御装置を設け、且
つマスク指令を圧力調節器を介して前記速度制御装置に
導入するよう構成したことを特徴とする流動床ボイラの
入口空気圧力制御装置０1) An inlet air pressure control device 0 for a fluidized bed boiler, characterized in that a speed control device is provided in the drive motor of the forced air blower, and a mask command is introduced into the speed control device via a pressure regulator.
JP57198373A 1982-11-12 1982-11-12 Inlet air pressure control device of fluidized bed boiler Pending JPS5989924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57198373A JPS5989924A (en) 1982-11-12 1982-11-12 Inlet air pressure control device of fluidized bed boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57198373A JPS5989924A (en) 1982-11-12 1982-11-12 Inlet air pressure control device of fluidized bed boiler

Publications (1)

Publication Number Publication Date
JPS5989924A true JPS5989924A (en) 1984-05-24

Family

ID=16390029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57198373A Pending JPS5989924A (en) 1982-11-12 1982-11-12 Inlet air pressure control device of fluidized bed boiler

Country Status (1)

Country Link
JP (1) JPS5989924A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030703A1 (en) * 1995-03-28 1996-10-03 British Steel Plc Process control, method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030703A1 (en) * 1995-03-28 1996-10-03 British Steel Plc Process control, method and apparatus

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