JP2005147472A - Combustion control method of combustion chamber of waste melting treatment facility - Google Patents
Combustion control method of combustion chamber of waste melting treatment facility Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 138
- 239000002699 waste material Substances 0.000 title claims abstract description 16
- 238000002844 melting Methods 0.000 title claims abstract description 15
- 230000008018 melting Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 51
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 7
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000010354 integration Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000002123 temporal effect Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
Description
本発明は、一般廃棄物、産業廃棄物等の廃棄物を廃棄物溶融炉で処理する際に発生する可燃性ガス及び可燃性ダスト（以下「チャー」という。）を燃焼させる廃棄物溶融処理設備の燃焼室の燃焼制御方法に関する。 The present invention relates to a waste melting treatment facility for combusting combustible gas and combustible dust (hereinafter referred to as “char”) generated when waste such as general waste and industrial waste is processed in a waste melting furnace. The present invention relates to a combustion control method for a combustion chamber.
従来、廃棄物溶融炉で発生するチャーを含有する可燃性ガスは、除塵器でチャーを捕集し、チャーを可燃性ガスと共に燃焼室へ供給し燃焼空気で燃焼させている。 Conventionally, combustible gas containing char generated in a waste melting furnace is collected by a dust remover, supplied to the combustion chamber together with combustible gas, and burned with combustion air.
図３は、従来の可燃性ガスの燃焼の制御系統図である。 FIG. 3 is a control system diagram of conventional combustion of combustible gas.
燃焼室１若しくは燃焼室以降に設けられたボイラ出口、若しくは誘引通風機出口の排ガス出口２に排ガス酸素センサ３が配置され、酸素センサ３の酸素濃度の検出信号は排ガス酸素濃度調節計４へ送られ、排ガス酸素濃度調節計４は２次空気流量調節計１７に信号を送り、２次空気流量調節計１７は２次空気流量計１８で流量を測定しながら排ガス出口２の酸素濃度が一定となるように２次空気流量調節弁１９の開度を調節する。
An exhaust gas oxygen sensor 3 is disposed at a combustion chamber 1 or a boiler outlet provided after the combustion chamber or an
通常、廃棄物溶融炉より排出される可燃性ガス成分及びチャーは、一定しておらず時々刻々と変化し、このため、２次燃焼空気を過剰に供給して未燃ＣＯの発生を抑制している。 Normally, combustible gas components and char discharged from a waste melting furnace are not constant and change from moment to moment. For this reason, an excessive supply of secondary combustion air is supplied to suppress the generation of unburned CO. ing.
また、排ガス中の酸素濃度を一定に保つ燃焼制御方法として、特許文献１には、図４に示す燃焼制御系統図のごとく、燃焼室１の出口以降に排ガス酸素濃度計３をもつ燃焼室内に明るさ検出センサ５を設け、明るさの変化により炉内の燃焼状態の相対的変化をとらえ、燃焼負荷が増大した場合には、燃焼制御のため、２次空気の空気流量調節弁１９の開度を一定時間増大させ、空気量を増加させることで燃焼制御を安定させる制御が記載されている。なお、６は明るさセンサ５からの信号の変化率を演算する演算器である。１２、１３は共に信号の加算器である。
しかし、前記従来の燃焼室の燃焼では、過剰空気が多いと燃焼排ガス温度の低下によるダイオキシン発生が懸念され過剰空気は少ないほうがよい。なお、ダイオキシン発生抑制ガイドラインでは、燃焼室内８５０℃、２秒以と規定されている。また、過剰空気による排ガス量の増大は、燃焼室後段の誘引通風機や排ガス集塵機などの設備の容量増大を招き不経済である。 However, in the conventional combustion in the combustion chamber, if there is a large amount of excess air, dioxins are likely to be generated due to a decrease in the temperature of the combustion exhaust gas. The dioxin generation suppression guideline stipulates that the combustion chamber is 850 ° C. and 2 seconds or longer. Further, the increase in the amount of exhaust gas due to excess air is uneconomical because it increases the capacity of facilities such as an induction fan and exhaust gas dust collector at the rear stage of the combustion chamber.
さらに、廃棄物溶融炉の炉況によりチャーの発生量が急増することがあり、燃焼室でのチャーの急激な燃焼により排ガス酸素濃度が規定値を守れず未燃ＣＯの発生が起こるが、排ガス酸素センサ及び排ガス酸素濃度調節計による補正は、測定の遅れや燃焼後の排ガス酸素濃度測定によるために間に合わない。 Furthermore, the amount of char generated may increase rapidly depending on the furnace conditions of the waste melting furnace, and the exhaust gas oxygen concentration does not meet the specified value due to the rapid combustion of char in the combustion chamber, but unburned CO is generated. The correction by the oxygen sensor and the exhaust gas oxygen concentration controller is not in time because of the measurement delay or the exhaust gas oxygen concentration measurement after combustion.
また、前記明るさ検出センサを用いた燃焼制御方法では、燃焼室内の負荷の増大に対し、相対的に増減を判断することは出来るが、負荷の変化量を絶対的な変化量として捕らえることが出来ない。このため、二次燃焼空気量の変化が実際の変化量に合わず、空気量の過不足により、未燃ＣＯを発生させたり、温度低下を引き起こす場合があった。 Further, in the combustion control method using the brightness detection sensor, it is possible to determine a relative increase / decrease with respect to an increase in the load in the combustion chamber, but it is possible to capture the change amount of the load as an absolute change amount. I can't. For this reason, the change in the amount of secondary combustion air does not match the actual amount of change, and there are cases where unburned CO is generated or the temperature is lowered due to excess or deficiency in the amount of air.
このときの一例を図５に示す。図５のＡは補正制御が適正に作用した場合を示す。図５のＢは燃焼負荷の持続時間が想定よりも短く、補止量が大きすぎたために空気量過多となり燃焼温度が低下した状態を示す。図５のＣは変化が燃焼負荷変化以外の要因により起こった一時的な温度指示値の低下であり、不必要に補正を掛けることでＢと同様に燃焼温度が低下した状態を示す。図５のＤは燃焼負荷の変化速度が小さく、補正制御が働かなかったために、排ガス中酸素濃度が低下した状態を示す。 An example at this time is shown in FIG. FIG. 5A shows a case where the correction control is properly applied. FIG. 5B shows a state in which the duration of the combustion load is shorter than expected and the amount of air is excessive because the amount of stoppage is too large, and the combustion temperature is lowered. C in FIG. 5 is a temporary decrease in the temperature instruction value caused by a factor other than the change in the combustion load, and shows a state in which the combustion temperature is lowered similarly to B by applying correction unnecessarily. FIG. 5D shows a state where the oxygen concentration in the exhaust gas is lowered because the change rate of the combustion load is small and the correction control does not work.
また、明るさの時間的変化に対して一定時間補正を掛けることで、燃焼負荷の時間的な積分量を算出し、変化の速度、変化の持続時間の両者を総合して補正することが出来なかった。 In addition, by applying a fixed time correction to the temporal change in brightness, the temporal integration amount of the combustion load can be calculated, and both the speed of change and the duration of change can be corrected comprehensively. There wasn't.
一方で、燃焼室内の酸素濃度を遅れ時間無しに測定する、レーザー式酸素濃度計が開発されているが、装置本体が高価であること、装置のダスト除去対策として、高価な窒素を必要とすることから、実施にあたっては不経済となる。 On the other hand, a laser oximeter that measures the oxygen concentration in the combustion chamber without delay has been developed. However, the device itself is expensive, and expensive nitrogen is required as a measure for removing dust from the device. Therefore, it is uneconomical for implementation.
本発明は、チャーの急激な燃焼に対し、遅れることなく適切な空気量を供給することができるとともに、燃焼室の燃焼状態の量を絶対量として捉え、チャーの急激な燃焼に対応できる、廃棄物溶融処理設備の燃焼室の燃焼制御方法を提供するものである。 The present invention is capable of supplying an appropriate amount of air without delay with respect to the rapid combustion of char, and considering the amount of combustion state in the combustion chamber as an absolute amount, which can cope with rapid combustion of char. A combustion control method for a combustion chamber of a material melting treatment facility is provided.
本発明は、燃焼室からの排ガス中の酸素濃度を検出し燃焼室に吹き込む空気を流量調整するための排ガス酸素濃度調節計、２次空気流量計及び空気流量調節弁を備えた燃焼室の燃焼制御方法において、廃棄物溶融炉で発生する可燃性ダストを含有する可燃性ガスを燃焼空気により燃焼させる燃焼室に、燃焼室内の温度を光によって検出する放射温度計を設け、温度検出センサの出力の変化率を変化率演算器で演算し、前記変化量の絶対値に相応して燃焼室に吹き込む空気流量を連続的に変化させることを特徴とする。 The present invention relates to combustion in a combustion chamber provided with an exhaust gas oxygen concentration controller, a secondary air flow meter and an air flow control valve for detecting the oxygen concentration in the exhaust gas from the combustion chamber and adjusting the flow rate of the air blown into the combustion chamber. In the control method, a radiation thermometer that detects the temperature in the combustion chamber with light is installed in the combustion chamber that burns the combustible gas containing the combustible dust generated in the waste melting furnace with the combustion air, and the output of the temperature detection sensor The change rate is calculated by a change rate calculator, and the flow rate of air blown into the combustion chamber is continuously changed in accordance with the absolute value of the change amount.
通常運転時には酸素濃度設定値を理論燃焼空気量に比較して高めに設定することで、常に過剰な空気が燃焼室内に投入されるように制御される。温度検出センサの出力の変化率が規定値を越えた時、初期の燃焼に必要な空気は２次燃焼空気の過剰空気分を充当させ、この空気が不足するまでに増加させた空気量が追いつくようにし、排ガス酸素濃度調節計による補正の遅れを補うため、排ガス酸素濃度調節計の遅れ時間に見合う時間、燃焼空気量の増加を保持する。 During normal operation, the oxygen concentration set value is set higher than the theoretical combustion air amount so that excessive air is always supplied into the combustion chamber. When the rate of change of the output of the temperature detection sensor exceeds the specified value, the air necessary for the initial combustion is allocated the excess air of the secondary combustion air, and the increased amount of air catches up until this air becomes insufficient. Thus, in order to compensate for the delay in correction by the exhaust gas oxygen concentration controller, an increase in the amount of combustion air is maintained for a time commensurate with the delay time of the exhaust gas oxygen concentration controller.
温度検出センサによる変化量を連続的に測定し、変化量を燃焼負荷量とみなし、吹き込む空気量の増加量を連続的に変化させ、変化の傾きの大小、変化の持続時間の長短に対して適切な空気量を連続的に補正できることを特微とする。これは、温度変化量の時間的積分値と吹き込み空気の補正量の積分値が相関性をもって制御できることを特徴とする（以下「連続補正制御」という。）。本制御は補正量の精度を重視する場合に用いる。本制御の具体例を図６に示す。図６のＡは補正制御が適正に作用した場合を示す。図６のＢは燃焼負荷の持続時間が想定よりも短いが、移動平均値との偏差によって持続時間を短くすることで適正な補正量が得られ、空気量過多となり燃焼温度が低下することなく適正な制御を継続することが出来る。図６のＣは変化が燃焼負荷変化以外の要因により起こった一時的な温度指示値の低下であり、補正制御を動作させないことで図５のＣで発生したような燃焼温度の低下を引き起こすことなく適切な状態で制御が継続できる。図６のＤは燃焼負荷の変化速度が小さいが、平均値との温度の偏差は大きくなり、補正制御が適切に働くため、図５のＤで起こったような排ガス中の酸素濃度の低下を防止することが出来る状態を示す。 The amount of change by the temperature sensor is continuously measured, the amount of change is regarded as the combustion load, the amount of increase in the amount of air blown is continuously changed, and the magnitude of the change and the change duration are short and long. It is characterized by the ability to continuously correct the appropriate amount of air. This is characterized in that the temporal integration value of the temperature change amount and the integration value of the correction amount of the blown air can be controlled with correlation (hereinafter referred to as “continuous correction control”). This control is used when importance is attached to the accuracy of the correction amount. A specific example of this control is shown in FIG. FIG. 6A shows a case where the correction control is properly applied. In FIG. 6B, although the duration of the combustion load is shorter than expected, an appropriate correction amount can be obtained by shortening the duration due to deviation from the moving average value, so that the air temperature is excessive and the combustion temperature does not decrease. Proper control can be continued. C in FIG. 6 is a temporary decrease in the temperature indication value caused by a factor other than the change in the combustion load, and causing the decrease in the combustion temperature as generated in C in FIG. 5 by not operating the correction control. Control can be continued in an appropriate state. In FIG. 6D, the change rate of the combustion load is small, but the deviation of the temperature from the average value becomes large, and the correction control works properly. Therefore, the decrease in the oxygen concentration in the exhaust gas as occurred in D of FIG. The state which can be prevented is shown.
温度検出センサによる変化量の瞬時値を用い、変化量から演算した補正量を用いて空気吹き込み制御弁の弁開度を一定時間開することで補正し、補正量は温度変化量を燃焼負荷変化量として演算し、補正量を温度変化量に対して一対一で決定できることを特徴とする（以下「ステップ補正制御」という。）。本制御は補正量の速度追従性を重視する場合に用いる。 Using the instantaneous value of the amount of change by the temperature detection sensor and using the correction amount calculated from the amount of change, the valve opening of the air blowing control valve is corrected by opening it for a certain period of time. It is calculated as an amount, and the correction amount can be determined one-to-one with respect to the temperature change amount (hereinafter referred to as “step correction control”). This control is used when importance is attached to the speed followability of the correction amount.
応答性の高い、光による温度センサを用いることで、燃焼状態の過渡的な状況を判断し、低負荷時からの復帰による制御上適切な温度上昇、炉内圧力変動による瞬時的な温度変化を燃焼負荷の増大とみなすことなく、誤検知による空気補正量の過剰状態を防止することが出来ることを特徴とする。 By using a light temperature sensor with high responsiveness, it is possible to determine the transient state of the combustion state, and to control the temperature rise appropriately by returning from a low load, and to instantaneously change the temperature due to fluctuations in the furnace pressure. It is characterized in that it is possible to prevent an excessive state of the air correction amount due to erroneous detection without considering that the combustion load increases.
通常、燃焼室に吹き込む空気は燃焼を主目的とした１次、２次空気とは別に燃焼室内の可燃性ガス、チャーと空気の混合性を向上させる目的で撹拌空気を利用することがあるが、上記制御方法において、増加させる空気は１次、２次空気とは別個に設置された撹拌に用いられる空気を使用しても良い。また、２次空気の流速を高く設定し、攪拌効果をもたせることで高い効果が得られる。 Usually, the air blown into the combustion chamber may use agitation air for the purpose of improving the mixing property of the combustible gas, char and air in the combustion chamber separately from the primary and secondary air for the main purpose of combustion. In the above control method, the air to be increased may be air used for agitation installed separately from primary and secondary air. Moreover, a high effect is acquired by setting the flow rate of secondary air high and giving a stirring effect.
本発明は、炉内温度変化を光として検出し、温度変化を２次空気流量のフィードフォワード要素として酸素濃度制御、２次空気流量を補正しているため、急激な燃焼に対する追従性がよい。また、温度変化量を燃焼負荷量として捉えることが出来、温度変化の絶対量に対し、空気補正量の絶対量を決めることが出来るため、精度の高い燃焼制御が可能となる。また、補正を連続的に作用させることにより、従来補正をさせることが難しかった、変化量の時間的な積分値に対しても適正な補正量を与えることができる。 In the present invention, the temperature change in the furnace is detected as light, and the oxygen concentration control and the secondary air flow rate are corrected using the temperature change as a feedforward element of the secondary air flow rate. Further, since the temperature change amount can be regarded as the combustion load amount, and the absolute amount of the air correction amount can be determined with respect to the absolute amount of the temperature change, combustion control with high accuracy is possible. In addition, by applying the correction continuously, it is possible to give an appropriate correction amount even to the temporal integration value of the change amount, which has been difficult to perform conventionally.
図１は、本発明による可燃性ガスの燃焼の制御系統図である。 FIG. 1 is a control system diagram of combustion of combustible gas according to the present invention.
燃焼室１の排ガス出口２に排ガス中の酸素濃度を検出する排ガス酸素センサ３が配置され、排ガス酸素センサ３の酸素濃度の検出信号は排ガス酸素濃度調節計４へ送られる。
An exhaust gas oxygen sensor 3 for detecting the oxygen concentration in the exhaust gas is disposed at the
燃焼室には炉内の状態を測定するフォトセンサからなる温度検出センサ５が設けられ、温度検出センサ５の信号は変化率演算器６、移動平均演算器７へ送られる。
The combustion chamber is provided with a
変化率演算器８は温度検出センサ５の出力と移動平均演算器７の出力から、燃焼負荷の定常状態からの変化量を演算し、燃焼負荷補正テーブル９に入力される。
The change rate calculator 8 calculates the amount of change from the steady state of the combustion load from the output of the
燃焼負荷補正テーブル９では燃焼負荷の変化量に対し、必要な空気量を演算し、補正空気量を出力する。 The combustion load correction table 9 calculates a necessary air amount for the change amount of the combustion load and outputs a corrected air amount.
１次、２次空気流量調節計１４、１７は１次、２次空気流量計１５、１８から流量の測定信号が入力され、酸素濃度調節計４からの空気量指令と燃焼負荷補正テーブル９の出力値が加算器１１に入力され、加算器１１の信号は１次、２次空気流量調節計１４、１７へ入力され、適切な空気量が炉内に吹き込まれるように１次、２次空気流量調節弁１６、１９が調整される。
The primary and secondary
燃焼空気に燃焼負荷変動分の空気を事前に吹き込むことにより、排ガス酸素濃度が変動することを防止できる（連続補正制御）。 It is possible to prevent the exhaust gas oxygen concentration from fluctuating by blowing in advance the air corresponding to the fluctuation of the combustion load into the combustion air (continuous correction control).
２次空気流量調節計１７は、２次空気流量計１８から流量の測定信号が入力される。変化率演算器６の信号は燃焼負荷補正テーブル１０へ入力される。
The secondary
燃焼負荷補正テーブル１０では入力された温度の変化率を元に、温度変化として検出される燃焼負荷の変化量を演算し、必要な空気量を弁開度として出力し、２次空気流量調整弁１７へ入力される。 The combustion load correction table 10 calculates a change amount of the combustion load detected as a temperature change based on the input temperature change rate, outputs a necessary air amount as a valve opening degree, and outputs a secondary air flow rate adjustment valve. 17 is input.
２次空気流量調節計１７の信号は、燃焼負荷補正テーブル１０の信号とともに加算器１３へ入力され、加算器１３の信号は２次空気流量調節弁１９に送られて、２次空気流量調節弁１９の開度を調節する。
The signal of the secondary air
次ぎに、本発明の制御方法について説明する。 Next, the control method of the present invention will be described.
図２は本発明による可燃性ガスの燃焼の制御フロー図である。 FIG. 2 is a control flow chart of combustion of combustible gas according to the present invention.
連続補正制御では、温度検出センサ５の出力、移動平均演算器７から変化率演算器８にて温度の変化量を演算し、演算結果を燃焼負荷補正テーブル９で燃焼負荷の変化量に相対するように空気量の補正値ΔＭＶとして出力する。補正値は酸素濃度制御系への補正量として加算される。補正量ΔＭＶは通常の酸素濃度における制御系の出力値ＭＶからＭＶ＋ΔＭＶとして燃焼空気量調節系に空気要求量として出力される。酸素濃度制御系はＭＶ＋ΔＭＶとして制御された空気量の結果として検出されるＰＶを用いて連続的に制御を続ける。
In the continuous correction control, the output of the
一方ステップ補正制御では、温度検出センサ５の出力から変化率演算器６で演算した結果、変化率が規定値を越えない場合は、通常の２次空気流量ＳＶとなるように２次空気流量調節弁を通常の開度ＭＶとする。温度変化率の規定値は、１０℃〜３０℃に設定する。
On the other hand, in the step correction control, if the change rate does not exceed the specified value as a result of calculation by the change rate calculator 6 from the output of the
変化率が規定値を越えた時、チャーの急激な燃焼と判断し、２次空気流量調節弁を通常の開度ＭＶからＭＶ＋ΔＭＶとなるようにして燃焼空気量を増加させる。 When the rate of change exceeds a specified value, it is determined that char is suddenly burned, and the amount of combustion air is increased by changing the secondary air flow rate control valve from the normal opening MV to MV + ΔMV.
燃焼室内の温度が変化した時は、既に燃焼室内の負荷が増大しているため、初期の燃焼に必要な空気は、２次燃焼空気の過剰空気分を充当させ、この空気が不足するまでに上記判断にて増加させた空気量が追いつくようにする。排ガス酸素濃度調節計による補正の遅れを補うため、排ガス酸素濃度調節計の遅れ時間に見合う時間、燃焼空気量の増加を保持する。一定時間経過後、例えば、２０秒程度経過すると、排ガス酸素濃度調節計による補正で２次空気流量が追随してくる。 When the temperature in the combustion chamber changes, the load in the combustion chamber has already increased, so that the air required for the initial combustion is used by applying the excess air content of the secondary combustion air until this air becomes insufficient. The amount of air increased by the above judgment is caught up. In order to compensate for the delay in correction by the exhaust gas oxygen concentration controller, the increase in the combustion air amount is maintained for a time corresponding to the delay time of the exhaust gas oxygen concentration controller. For example, when about 20 seconds elapse after a certain time has elapsed, the secondary air flow rate follows the correction by the exhaust gas oxygen concentration controller.
前記移動平均値が規定値より小さい場合には補正を掛けないことで、低負荷状態からの復帰過程等の正常な温度上昇を判断し、過剰空気による温度低下を防止する。 When the moving average value is smaller than a specified value, correction is not performed, so that a normal temperature increase such as a recovery process from a low load state is determined, and a temperature decrease due to excess air is prevented.
規定値は８００℃〜９００℃程度に設定する。また、移動平均値との差を温度変化として検出することで、炉内圧力の瞬間的な変動による、温度変化検出結果を燃焼負荷とは無関係な変化と認識し、補正を欠けないことで制御の不安定化を防止する。 The specified value is set to about 800 ° C to 900 ° C. In addition, by detecting the difference from the moving average value as a temperature change, the temperature change detection result due to instantaneous fluctuations in the furnace pressure is recognized as a change unrelated to the combustion load, and control is performed without any correction. To prevent instability.
チャーの急激な燃焼に対し、遅れることなく適切な空気量を供給することができるとともに、燃焼室の燃焼状態の量を絶対量として捉え、チャーの急激な燃焼に対応できる、廃棄物溶融処理設備の燃焼室の燃焼制御に利用する。 A waste melting treatment facility that can supply an appropriate amount of air without delay in response to the rapid combustion of char, and can treat the amount of combustion in the combustion chamber as an absolute amount, and can respond to sudden combustion of char. This is used to control the combustion of the combustion chamber.
１：燃焼室、２：排ガス出口、３：排ガス酸素センサ、４：排ガス酸素濃度調節計、５：温度検出センサ、６：変化率演算器、７：移動平均演算器、８：変化率演算器、９：燃焼負荷補正テーブル、１０：燃焼負荷補正テーブル、１１：加算器、１２：加算器、１３：加算器、１４：１次空気流量調節計、１５：１次空気流量計、１６：１次空気流量調節弁、１７：２次空気流量調節計、１８：２次空気流量計、１９：２次空気流量調節弁 1: Combustion chamber, 2: Exhaust gas outlet, 3: Exhaust gas oxygen sensor, 4: Exhaust gas oxygen concentration controller, 5: Temperature detection sensor, 6: Change rate calculator, 7: Moving average calculator, 8: Change rate calculator 9: Combustion load correction table, 10: Combustion load correction table, 11: Adder, 12: Adder, 13: Adder, 14: 1 primary air flow controller, 15: 1 primary air flow meter, 16: 1 Secondary air flow control valve, 17: Secondary air flow controller, 18: Secondary air flow meter, 19: Secondary air flow control valve
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