JPH10132466A - Fluidized bed type furnace operation control device - Google Patents

Fluidized bed type furnace operation control device

Info

Publication number
JPH10132466A
JPH10132466A JP28345096A JP28345096A JPH10132466A JP H10132466 A JPH10132466 A JP H10132466A JP 28345096 A JP28345096 A JP 28345096A JP 28345096 A JP28345096 A JP 28345096A JP H10132466 A JPH10132466 A JP H10132466A
Authority
JP
Japan
Prior art keywords
value
control device
control
fluidized bed
bed furnace
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
JP28345096A
Other languages
Japanese (ja)
Inventor
Mitsuo Tazaki
光雄 田崎
Tomonori Nonogami
智規 野々上
Kazuo Nagahama
和男 長▲濱▼
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.)
Kubota Corp
Original Assignee
Kubota 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 Kubota Corp filed Critical Kubota Corp
Priority to JP28345096A priority Critical patent/JPH10132466A/en
Publication of JPH10132466A publication Critical patent/JPH10132466A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To perform operation in response to a control target reflecting an intention of an operator at each of the times by a method wherein a plurality of control targets and a procedure for calculating a set value SV required for accomplishing each of the control targets by using a process value PV are registered in advance. SOLUTION: An automatic combustion control device 2 is operated such that a plurality of control targets are set in such a way that they may be selected and a procedure for calculating a set value SV required for accomplishing each of the control targets upon receiving an input of the process value PV from each of the sensor means in a fluidized bed furnace plant is registered in advance. Then, the process value PV obtained from each of the sensor means in the fluidized bed furnace plant 1 and the set value SV obtained from the automatic combustion control device 2 are received by an indicating regulator 3 to calculate an operation value MV, the calculated operation value MV is inputted to each of the operating means in the fluidized bed furnace plant 1. With such an arrangement as above, it is possible to perform an operation corresponding to a control target reflecting an intention of an operator 5 at each of the times.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、流動床式の焼却炉
における運転を制御する流動床炉運転制御装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluidized bed furnace operation control device for controlling the operation of a fluidized bed incinerator.

【0002】[0002]

【従来の技術】従来、例えば、流動床式の焼却炉におい
ては、炉底に砂を溜めて砂層を形成し、砂層の上方空間
をフリーボードに形成しており、砂層とフリーボードと
により炉内の燃焼帯を構成している。砂層は、下方から
供給する高温の高圧空気により流動して流動層となり、
炉内に投入された廃棄物を砂中において瞬時的に乾燥・
焼却する。このとき、砂は熱容量が非常に大きく、熱伝
達率が速いので、廃棄物に対して高速に、乾燥・着火の
ための熱量を供給する。一方、廃棄物の燃焼により生成
した燃焼熱が砂を高温に維持し、連続瞬時燃焼を可能に
する。廃棄物は、瞬時的に燃焼した後に、灰分が飛灰と
なってガス中へ飛散し、集塵装置で回収される一方で、
飛散できない大きな灰や異物などの焼却残渣が砂と共に
炉の下部から取り出される。焼却残渣は、スクリーンで
砂と分離されて取り出され、分離した砂は炉の上部から
炉内に循環投入される。
2. Description of the Related Art Conventionally, for example, in a fluidized bed incinerator, sand is formed at a furnace bottom to form a sand layer, and a space above the sand layer is formed on a free board. Constitutes the combustion zone. The sand layer flows by the high-temperature high-pressure air supplied from below and becomes a fluidized bed.
Instantly dry waste in the furnace in sand
Incinerate. At this time, since the sand has a very large heat capacity and a high heat transfer coefficient, it supplies heat to the waste at high speed for drying and ignition. On the other hand, the combustion heat generated by the combustion of the waste keeps the sand at a high temperature and enables continuous instantaneous combustion. After the waste is burned instantaneously, the ash becomes fly ash and scatters into the gas, and is collected by the dust collector,
Incineration residues such as large ash and foreign matter that cannot be scattered are taken out from the lower part of the furnace together with sand. The incineration residue is separated from the sand by a screen and taken out, and the separated sand is circulated into the furnace from the top of the furnace.

【0003】このような、流動床式の焼却炉において
は、定格(一定値)の処理量を確保することを最優先の
目標として、焼却炉の安定燃焼を維持するように、その
運転を制御している。運転の制御に際しては、焼却炉に
設けた温度計や濃度計等のセンサー手段により、焼却炉
の現在の運転状況を示すプロセス値PVを検出し、検出
したプロセス値PVを指示調節計において設定値SVと
比較して操作値MVを算出し、操作値MVに基づいて焼
却炉の各操作手段を制御していた。
In such a fluidized bed incinerator, the operation of the incinerator is controlled so as to maintain stable combustion in the incinerator with the highest priority being to secure a rated (constant value) throughput. doing. In controlling the operation, a sensor value such as a thermometer or a densitometer provided in the incinerator detects a process value PV indicating the current operation state of the incinerator, and the detected process value PV is set to a set value in the indicating controller. The operating value MV was calculated in comparison with the SV, and each operating means of the incinerator was controlled based on the operating value MV.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記した従来
の構成においては、定格以外の処理量で焼却炉の運転を
行いたい場合に、たとえば排ガスの性状の向上を第一義
的な目標として運転したいときや、燃料の消費量の抑制
を第一義的な目標として運転したいときにあっても、制
御プログラムが基本的に定格の処理量を確保することを
第一義的な目標とするように構成されているために、そ
のときの状況に応じて優先目標を変更することができな
かった。
However, in the conventional configuration described above, when it is desired to operate the incinerator with a treatment amount other than the rated amount, the operation is performed with the primary goal of improving the properties of the exhaust gas, for example. The primary goal is to ensure that the control program basically secures the rated throughput, even if you want to do so or when you want to operate with the primary goal of suppressing fuel consumption. Therefore, the priority target could not be changed according to the situation at that time.

【0005】本発明は上記した課題を解決するものであ
り、その時々における運転員の意思によって制御におけ
る優先目標を変更して運転を行うことができる流動床炉
運転制御装置を提供することを目的とする。
An object of the present invention is to solve the above-mentioned problems and to provide a fluidized-bed furnace operation control apparatus capable of changing a priority target in control according to the intention of an operator at each time and performing operation. And

【0006】[0006]

【課題を解決するための手段】上記した課題を解決する
ために、本発明の流動床炉運転制御装置は、流動床炉の
運転制御に係る各種の制御要素の各々を制御するための
複数の操作手段と、流動床炉の運転状態を示す指標とし
ての各種のプロセス値PVを検出する複数のセンサ手段
と、各センサ手段からのプロセス値PVの入力を受けて
設定値SVを算出する自動燃焼制御装置と、各センサ手
段からのプロセス値PVと自動燃焼制御装置からの設定
値SVの入力を受けて操作値MVを算出し、算出した操
作値MVを各操作手段に入力する指示調節計と、自動燃
焼制御装置に制御目標を指示する制御目標切換手段とを
備え、自動燃焼制御装置は、複数の制御目標と、各制御
目標を達成するために必要な設定値SVをプロセス値P
Vから算出する手順とが予め登録してなるものである。
In order to solve the above-mentioned problems, a fluidized-bed furnace operation control apparatus according to the present invention comprises a plurality of control units for controlling various control elements related to the operation control of a fluidized-bed furnace. Operating means, a plurality of sensor means for detecting various process values PV as an index indicating the operating state of the fluidized bed furnace, and automatic combustion for calculating a set value SV in response to input of the process value PV from each sensor means A control device, an instruction controller for calculating an operation value MV by receiving the process value PV from each sensor means and the set value SV from the automatic combustion control apparatus, and inputting the calculated operation value MV to each operation means; A control target switching means for instructing the automatic combustion control device with a control target. The automatic combustion control device converts a plurality of control targets and a set value SV required to achieve each control target into a process value P.
The procedure for calculating from V is registered in advance.

【0007】[0007]

【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて説明する。図1において、流動床炉プラント1
は、例えば、流動床式の焼却炉であり、炉底に砂を溜め
て砂層を形成し、砂層の上方空間をフリーボードに形成
し、砂層とフリーボードとにより炉内の燃焼帯を構成し
ている。砂層は、下方から供給する高温の高圧空気によ
り流動して流動層となり、炉内に投入された廃棄物を砂
中において瞬時的に乾燥・焼却する。
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a fluidized-bed furnace plant 1
Is, for example, a fluidized bed incinerator, in which sand is accumulated at the bottom of the furnace to form a sand layer, the space above the sand layer is formed on a free board, and the sand layer and the free board constitute a combustion zone in the furnace. ing. The sand layer flows by high-temperature high-pressure air supplied from below to become a fluidized bed, and instantaneously dries and incinerates waste put in the furnace in the sand.

【0008】このような流動床炉においては、運転制御
に係る各種の制御要素の各々を制御するために複数の操
作手段を有しており、制御要素としては、廃棄物の投入
量、燃焼空気量、燃料消費量などがあり、操作手段とし
ては、送風機、ダンパ装置、バルブなどがある。流動床
炉プラント1には、流動床炉の運転状態を示す指標とし
ての各種のプロセス値PV、例えばフリーボード温度、
砂層温度、送風量などを検出する複数のセンサ手段(温
度計、風量計、流量計など)が設けてある。
[0008] Such a fluidized bed furnace has a plurality of operating means for controlling each of various control elements related to the operation control. The operation means includes a blower, a damper device, a valve, and the like. The fluidized-bed furnace plant 1 has various process values PV as an index indicating the operating state of the fluidized-bed furnace, for example, a freeboard temperature,
A plurality of sensor means (thermometer, air flow meter, flow meter, etc.) for detecting the sand layer temperature, the amount of air blow, etc. are provided.

【0009】自動燃焼制御装置2は、複数の制御目標が
選択可能に設定してあり、各制御目標を達成するために
必要な設定値SVを、流動床炉プラント1の各センサ手
段からのプロセス値PVの入力を受けて算出する手順が
予め登録してある。この制御目標には、通常運転、処理
量減、排ガス性状の向上などがあり、設定値SVの算出
手順を規定する制御ルールの例としては下記のものがあ
る。 1.IF 制御目標=通常運転 AND 廃棄物投入量
(プロセス値)=1.0 AND 排ガスCO濃度(プロセス値)=並 THEN 現状維持(前回のSV値を今回も出力) 2.IF 制御目標=処理量減 AND 廃棄物投入量
(プロセス値)=1.0 AND 排ガスCO濃度(プロセス値)=並 THEN 廃棄物投入量=減 AND 燃焼空気量=減 3.IF 制御目標=排ガス性状向上 AND 廃棄物
投入量(プロセス値)=1.0 AND 排ガスCO濃
度(プロセス値)=並 THEN 燃焼空気量=増 AND フリーボード温度
=高 指示調節計3は、流動床炉プラント1の各センサ手段か
らのプロセス値PVと自動燃焼制御装置2からの設定値
SVの入力を受けて操作値MVを算出するものであり、
算出した操作値MVを流動床炉プラント1の各操作手段
に入力する。
The automatic combustion control device 2 has a plurality of control targets set so as to be selectable, and sets a set value SV necessary for achieving each control target in a process from each sensor means of the fluidized-bed furnace plant 1. A procedure for receiving and calculating the value PV is registered in advance. The control target includes normal operation, reduction of the processing amount, improvement of the exhaust gas property, and the like. Examples of the control rules that define the calculation procedure of the set value SV include the following. 1. 1. IF control target = normal operation AND waste input amount (process value) = 1.0 AND exhaust gas CO concentration (process value) = average THEN Maintain current status (previous SV value is also output this time) 2. IF control target = processing amount reduction AND waste input amount (process value) = 1.0 AND exhaust gas CO concentration (process value) = normal THEN waste input amount = reduction AND combustion air amount = reduction IF control target = improve exhaust gas properties AND Waste waste input (process value) = 1.0 AND exhaust gas CO concentration (process value) = normal THEN combustion air volume = increase AND freeboard temperature = high The operation value MV is calculated by receiving the process value PV from each sensor means of the furnace plant 1 and the set value SV from the automatic combustion control device 2,
The calculated operation value MV is input to each operation means of the fluidized bed furnace plant 1.

【0010】制御目標切換手段4は、自動燃焼制御装置
2に制御目標を指示するものであり、運転員5の選択し
た指示にしたがって選択指示信号を自動燃焼制御装置2
に入力する。
The control target switching means 4 is for instructing the automatic combustion control device 2 on the control target, and outputs a selection instruction signal in accordance with the instruction selected by the operator 5.
To enter.

【0011】上記した構成により、運転員5が通常運転
を意図する場合にあっては、制御目標切換手段4から自
動燃焼制御装置2へ「通常運転」を制御目標に設定する
選択指示信号を入力する。この状態において、自動燃焼
制御装置2は、「通常運転」を維持するように制御ルー
ルを実行し、流動床炉プラント1の各センサ手段から入
力する各種のプロセス値PVを受けて各々の設定値SV
値を算出する。各指示調節計3は、流動床プラント1の
各センサ手段からのプロセス値PVを受けて自動燃焼制
御装置2からの設定値SVに見合う操作値MVを算出
し、算出した操作値MVを各操作手段に指示する。
With the above configuration, when the operator 5 intends to perform normal operation, a selection instruction signal for setting “normal operation” as a control target is input from the control target switching means 4 to the automatic combustion control device 2. I do. In this state, the automatic combustion control device 2 executes a control rule so as to maintain “normal operation”, receives various process values PV input from each sensor means of the fluidized-bed furnace plant 1, and sets each set value. SV
Calculate the value. Each of the indicating controllers 3 receives the process value PV from each sensor means of the fluidized bed plant 1, calculates an operation value MV corresponding to the set value SV from the automatic combustion control device 2, and converts the calculated operation value MV into each operation value. Instruct the means.

【0012】運転員5が状況に応じて制御目標の変更を
意図する場合には、制御目標切換手段4を操作し、目的
とする制御目標を選択指示するための信号を自動燃焼制
御装置2へ入力し、例えば「排ガス性状向上」を選択す
る。この状態において、自動燃焼制御装置2は、「排ガ
ス性状向上」を維持するように制御ルールを実行する。
つまり、「通常運転」モードでは処理量を定格に維持す
ることを優先していたが、「排ガス性状向上」モードで
は排ガスの性状を向上させることを優先事項とするため
に、燃焼空気量の増加やフリーボード温度を高くするこ
とを指向する制御する。
When the operator 5 intends to change the control target according to the situation, the operator operates the control target switching means 4 to send a signal for selecting and instructing the target control target to the automatic combustion control device 2. Input, and select, for example, “exhaust gas property improvement”. In this state, the automatic combustion control device 2 executes the control rule so as to maintain “exhaust gas property improvement”.
In other words, in the "normal operation" mode, priority was given to maintaining the processing amount at the rated value, but in the "exhaust gas property improvement" mode, an increase in the amount of combustion air was required to improve the exhaust gas properties. Or control to increase the freeboard temperature.

【0013】[0013]

【発明の効果】以上述べたように本発明によれば、運転
員がその場の状況に応じて制御目標の変更を意図する場
合には、制御目標切換手段により自動燃焼制御装置へ制
御目標の変更を指示することにより、その時々における
運転員の意思を反映した制御目標に応じた運転を行うこ
とができる。
As described above, according to the present invention, when the operator intends to change the control target according to the situation at the site, the control target switching means sends the control target to the automatic combustion control device. By instructing the change, it is possible to perform the operation according to the control target reflecting the intention of the operator at each time.

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

【図1】本発明の実施形態を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 流動床炉プラント 2 自動燃焼制御装置 3 指示調節計 4 制御目標切換手段 5 運転員 DESCRIPTION OF SYMBOLS 1 Fluid bed furnace plant 2 Automatic combustion control device 3 Indicating controller 4 Control target switching means 5 Operator

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 流動床炉の運転制御に係る各種の制御要
素の各々を制御するための複数の操作手段と、流動床炉
の運転状態を示す指標としての各種のプロセス値PVを
検出する複数のセンサ手段と、各センサ手段からのプロ
セス値PVの入力を受けて設定値SVを算出する自動燃
焼制御装置と、各センサ手段からのプロセス値PVと自
動燃焼制御装置からの設定値SVの入力を受けて操作値
MVを算出し、算出した操作値MVを各操作手段に入力
する指示調節計と、自動燃焼制御装置に制御目標を指示
する制御目標切換手段とを備え、自動燃焼制御装置は、
複数の制御目標と、各制御目標を達成するために必要な
設定値SVをプロセス値PVから算出する手順とが予め
登録してなることを特徴とする流動床炉運転制御装置。
1. A plurality of operation means for controlling each of various control elements related to the operation control of a fluidized bed furnace, and a plurality of operation means for detecting various process values PV as an index indicating an operation state of the fluidized bed furnace. , An automatic combustion control device that receives a process value PV from each sensor device to calculate a set value SV, and inputs a process value PV from each sensor device and the set value SV from the automatic combustion control device The automatic combustion control device includes an instruction controller for calculating an operation value MV in response to the instruction and inputting the calculated operation value MV to each operation means, and a control target switching means for instructing the automatic combustion control device with a control target. ,
A fluidized-bed furnace operation control device, wherein a plurality of control targets and a procedure for calculating a set value SV necessary for achieving each control target from a process value PV are registered in advance.
JP28345096A 1996-10-25 1996-10-25 Fluidized bed type furnace operation control device Pending JPH10132466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28345096A JPH10132466A (en) 1996-10-25 1996-10-25 Fluidized bed type furnace operation control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28345096A JPH10132466A (en) 1996-10-25 1996-10-25 Fluidized bed type furnace operation control device

Publications (1)

Publication Number Publication Date
JPH10132466A true JPH10132466A (en) 1998-05-22

Family

ID=17665708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28345096A Pending JPH10132466A (en) 1996-10-25 1996-10-25 Fluidized bed type furnace operation control device

Country Status (1)

Country Link
JP (1) JPH10132466A (en)

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