JPS6080020A - Burning control of refuse incinerator - Google Patents
Burning control of refuse incineratorInfo
- Publication number
- JPS6080020A JPS6080020A JP18774683A JP18774683A JPS6080020A JP S6080020 A JPS6080020 A JP S6080020A JP 18774683 A JP18774683 A JP 18774683A JP 18774683 A JP18774683 A JP 18774683A JP S6080020 A JPS6080020 A JP S6080020A
- Authority
- JP
- Japan
- Prior art keywords
- lhv
- value
- refuse
- air
- estimated
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
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)
- Incineration Of Waste (AREA)
Abstract
Description
【発明の詳細な説明】
となるよう、操作員が手動にて操作したり、最近では自
動的に空気量を調節する装置を付加して、へ一定運転す
るプラントが増えて来ている。ところがごみ質は時々刻
々変化し、水分の多い低質ごみの場合は炉内での乾燥が
不十分となり、燃焼が不安定となる事があり、このよう
な時には、空気量を若干条目にする運転方法を操作員の
判断で実施しているが、常時監視の必要があったり、ま
た経験も必要である等の不具合があり、従って自動化の
要望が出ていた。DETAILED DESCRIPTION OF THE INVENTION In order to achieve this, an increasing number of plants are operated manually by an operator or, recently, by adding a device that automatically adjusts the amount of air. However, the quality of waste changes from moment to moment, and low-quality waste with a high moisture content may not be sufficiently dried in the furnace, resulting in unstable combustion. The method is implemented at the discretion of the operator, but there are drawbacks such as the need for constant monitoring and the need for experience, so there have been requests for automation.
本発明は前記従来の要望にこたえて提案されたもので、
低質ごみにおいても安定した燃焼を自動的に維持するご
み焼却炉用燃焼制御方法を提供することを目的とするも
ので、ごみ焼却炉における燃焼空気量を調節する方法に
おいて、ごみの低位発熱量を推定し、その値に従って空
気量を変更するごみ焼却炉燃焼制御方法に係り、焼却炉
の運転データよりLHV (低位発熱量)を推定し、予
じめ設定した低位発熱量対O2目標設定値の関数に従っ
て、低LHV時は〇一定制御装置の目標設定値をカスケ
ード的に上昇することを特徴とするものである。The present invention has been proposed in response to the above-mentioned conventional demands.
The purpose of this project is to provide a combustion control method for waste incinerators that automatically maintains stable combustion even with low-quality waste. The method involves estimating the LHV (lower heating value) from the incinerator operating data and changing the air volume according to the estimated value. According to the function, when the LHV is low, the target setting value of the constant control device is increased in a cascade manner.
以下本発明の実施例を図面について説明すると、第1図
は本発明の実施例を示し、L)IV推定装置4は、排熱
回収用のボイラ蒸発量1、燃焼空気量2、燃焼空気温度
3等の実測値をもとに熱収支法等を用いてごみ11のL
HV (低位発熱量)を推定計算する。推定LHV5の
値は、関数に入力され、LHVに相当するOL目標設定
値7を算出する。An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows an embodiment of the present invention, and the L) IV estimating device 4 includes a boiler evaporation amount 1 for exhaust heat recovery, a combustion air amount 2, and a combustion air temperature. The L of garbage 11 is determined using the heat balance method etc. based on the actual measured values of 3 etc.
Estimate and calculate HV (lower heating value). The value of the estimated LHV5 is input to a function to calculate the OL target set value 7 corresponding to the LHV.
関数の形は、例えば第2図に示すように設定する。The form of the function is set, for example, as shown in FIG.
ここでごみLHVの推定方法を第3図についである。Here, the method for estimating the waste LHV is shown in Fig. 3.
また給水12、蒸気13についてはW6=W4と仮定し
、エンタルピーも等しく、一定とすると、(Q4−Q6
)は蒸気量から算出できる。一方排ガス温度は、ボイラ
14のバイパスガス量を調節する事により一定に制御さ
れ、エンタルピー一定となり、排ガス150量W5=W
l +W2より05がめられる。また灰16の量W3お
よび比熱を一定と仮定すると、Q3がめられる。更にご
み11の比熱を一定とすると、Qlがめられる。Assuming that W6=W4 for the water supply 12 and steam 13, and assuming that the enthalpies are also equal and constant, (Q4-Q6
) can be calculated from the amount of steam. On the other hand, the exhaust gas temperature is controlled to be constant by adjusting the amount of bypass gas in the boiler 14, and the enthalpy is constant, and the amount of exhaust gas 150 W5=W
05 is determined from l +W2. Further, assuming that the amount W3 of the ash 16 and the specific heat are constant, Q3 is obtained. Furthermore, assuming that the specific heat of the dust 11 is constant, Ql can be determined.
以上よりボイラ蒸発量、燃焼空気17量、燃焼空気温度
、ごみ量が実測できれば、LHVがめられる。なお、1
8は炉を示す。From the above, if the amount of boiler evaporation, amount of combustion air, temperature of combustion air, and amount of waste can be measured, LHV can be determined. In addition, 1
8 indicates a furnace.
一方通常の02一定制御装置8はOL測定値9と、カス
ケード的に入力されたO目標設定値7を比較し、偏差が
零となるよう燃焼空気量調節信号1゜を出力する。これ
によって時々刻々変化するLHVを推定し、低い場合は
OL目標設定値を高目に運転する事によって、負荷に見
合った空気量より多口の空気が注入され、拡散効果によ
るごみの乾燥が促進され、安定燃焼が維持される。なお
、ごみのLHVが低いという事と、ごみの水分が多いと
いう事は同じと考えてよい。On the other hand, the normal 02 constant control device 8 compares the OL measurement value 9 with the 0 target setting value 7 input in a cascade manner, and outputs a combustion air amount adjustment signal of 1° so that the deviation becomes zero. This estimates the LHV, which changes from moment to moment, and if it is low, the OL target set value is set higher, so more air is injected than the amount of air commensurate with the load, and the drying of the garbage is promoted due to the diffusion effect. and stable combustion is maintained. Note that it can be considered that the fact that the LHV of the garbage is low is the same as the fact that the garbage has a high moisture content.
第1図は本発明方法の1例を説明するブロック図、第2
図は本発明におけるLHVと0との関係を示す線図、第
3図はLHVの推定方法の説明図である。
図の主要部分の説明
1−・ボイラ蒸発量 2・−燃焼空気量3−燃焼空気温
度 4・−LHV推定装置5−推定L HV 7−OL
目標設定値8・−0L一定制御装置
9−0測定値 11−ごみFIG. 1 is a block diagram explaining one example of the method of the present invention, and FIG.
The figure is a diagram showing the relationship between LHV and 0 in the present invention, and FIG. 3 is an explanatory diagram of the LHV estimation method. Explanation of main parts of the diagram 1- Boiler evaporation amount 2- Combustion air amount 3- Combustion air temperature 4- LHV estimation device 5- Estimated L HV 7-OL
Target setting value 8 -0L constant control device 9-0 measurement value 11-garbage
Claims (1)
、ごみの低位発熱量を推定し、その値に従って空気量を
変更することを特徴とするごみ焼却炉燃焼制御方法。A method for controlling combustion in a waste incinerator, the method comprising estimating the lower calorific value of waste and changing the air amount in accordance with the estimated value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18774683A JPS6080020A (en) | 1983-10-07 | 1983-10-07 | Burning control of refuse incinerator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18774683A JPS6080020A (en) | 1983-10-07 | 1983-10-07 | Burning control of refuse incinerator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6080020A true JPS6080020A (en) | 1985-05-07 |
Family
ID=16211469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18774683A Pending JPS6080020A (en) | 1983-10-07 | 1983-10-07 | Burning control of refuse incinerator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6080020A (en) |
-
1983
- 1983-10-07 JP JP18774683A patent/JPS6080020A/en active Pending
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