JP2695654B2 - Control device for ammonia gas injection volume - Google Patents
Control device for ammonia gas injection volumeInfo
- Publication number
- JP2695654B2 JP2695654B2 JP1035023A JP3502389A JP2695654B2 JP 2695654 B2 JP2695654 B2 JP 2695654B2 JP 1035023 A JP1035023 A JP 1035023A JP 3502389 A JP3502389 A JP 3502389A JP 2695654 B2 JP2695654 B2 JP 2695654B2
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- Japan
- Prior art keywords
- signal
- ammonia gas
- amount
- set value
- ammonia
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ボイラに用いる電気集塵器(以下EPとい
う)等の脱硫に用いるアンモニガス注入量の制御装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a control device for an injection amount of ammonia gas used for desulfurization of an electric dust collector (hereinafter referred to as EP) used for a boiler.
EPの入口側煙道にアンモニアガスを注入して脱硫を行
う装置においては、第2図に示すようにEP108の入口側
煙道107に注入管を介してアンモニアガスを注入して脱
硫処理を行い浄化ガスをEP出口側煙道109を経て排出さ
せている。In a device for performing desulfurization by injecting ammonia gas into the EP-side flue of an EP, as shown in FIG. 2, the ammonia gas is injected into the inlet-side flue 107 of the EP 108 through an injection pipe to perform desulfurization treatment. Purified gas is discharged through the flue 109 on the EP exit side.
上記アンモニアガスの注入量制御のための従来の制御
装置には、昭和62年出願公開第171733号(昭和61年特許
願第12118号)により提案された第2図及び第3図に示
すものがある。A conventional control device for controlling the injection amount of ammonia gas is shown in FIGS. 2 and 3 proposed by Japanese Patent Application Publication No. 171733/1987 (Japanese Patent Application No. 12118/1986). is there.
即ち、EP108の入口煙道107に注入されるアンモニアガ
ス量は、燃料流量信号101、燃料中の硫黄分設定値信号1
20、EP出口アンモニア濃度設定器113の出力信号及びEP1
08の出口煙道109の排ガス中のアンモニアガス濃度を検
出するアンモニアガス濃度計111の出力信号を入力した
演算回路102の出力信号とアンモニアガス注入管106に設
定されたアンモニアガス注入量検出器103の出力信号と
を調節器104で比較し、その偏差信号によりアンモニア
ガス注入管106に設置された調節弁105を開閉して、増減
されるものである。That is, the amount of ammonia gas injected into the inlet flue 107 of the EP 108 is determined by the fuel flow rate signal 101 and the sulfur content set value signal 1 of the fuel.
20, EP output ammonia concentration setting device 113 output signal and EP1
The output signal of the arithmetic circuit 102 to which the output signal of the ammonia gas concentration meter 111 for detecting the ammonia gas concentration in the exhaust gas of the outlet flue 109 of 08 is input and the ammonia gas injection amount detector 103 set in the ammonia gas injection pipe 106 The output signal is compared with the controller 104, and the control valve 105 provided on the ammonia gas injection pipe 106 is opened and closed by the deviation signal to increase or decrease the output signal.
上記演算回路102においては、燃料流量信号101を入力
した反応用アンモニアガス量演算回路112にて反応用ア
ンモニアガス量が求められ、同反応用アンモニアガス量
は補正回路に入力され燃料中の硫黄分によつて補正され
た反応用アンモニアガス量が求められる。また上記燃料
流量信号101は余剰用アンモニアガス量演算回路114に入
力されて余剰用アンモニアガス量が求められ、同余剰用
アンモニアガス量はEP108出口に残存する余剰用アンモ
ニアガス濃度の設定値を出力する余剰アンモニアガス濃
度設定器113からの信号を入力する補正回路により補正
され、補正された余剰用アンモニアガス量が求められ
る。上記補正された反応用アンモニアガス量には、上記
補正された余剰用アンモニアガス量が余剰用アンモニア
ガス加算器117にて加算され、更に、余剰用アンモニア
ガス濃度設定器113が出力した設定値とアンモニアガス
濃度計111が出力した実測値より比較器115が出力した余
剰用アンモニアガス量補正信号によつてサンプル制御回
路116にて補正が行われ、アンモニアガス注入量110が出
力される。In the arithmetic circuit 102, a reaction ammonia gas amount is calculated by a reaction ammonia gas amount calculation circuit 112 to which the fuel flow rate signal 101 has been input, and the reaction ammonia gas amount is input to a correction circuit and the sulfur content in the fuel is calculated. The amount of ammonia gas for reaction corrected by the above is obtained. Further, the fuel flow rate signal 101 is input to a surplus ammonia gas amount calculation circuit 114 to determine the surplus ammonia gas amount, and the surplus ammonia gas amount outputs the set value of the surplus ammonia gas concentration remaining at the EP108 outlet. Is corrected by a correction circuit that inputs a signal from the excess ammonia gas concentration setter 113 to obtain the corrected amount of excess ammonia gas. The corrected excess ammonia gas amount is added to the corrected excess ammonia gas amount in the excess ammonia gas adder 117, and the set value output from the excess ammonia gas concentration setter 113 is further added to the corrected ammonia gas amount for reaction. The sample control circuit 116 corrects the surplus ammonia gas amount correction signal output from the comparator 115 based on the actual measurement value output from the ammonia gas concentration meter 111, and the ammonia gas injection amount 110 is output.
上記反応用アンモニアガスは、燃料中に含まれる硫黄
分と次の反応式で示す反応を行い、硫酸アンモニウム
(NH4)2SO4を生成し、同硫酸アンモニウム(NH4)2SO4
はEP108によつて除去される。The reaction for ammonia gas, the reaction was carried out as indicated by sulfur and the following reaction scheme contained in the fuel, ammonium sulfate (NH 4) generates 2 SO 4, the ammonium sulfate (NH 4) 2 SO 4
Is removed by EP108.
S+O2→SO2 2SO2+O2→2SO3 SO3+H2O→H2SO4 NH3+H2SO4→NH4HSO4 NH4HSO4+NH3→(NH4)2SO4 上記反応用アンモニアガス量は、上記反応式をもとに
演算回路102内にて演算される。S + O 2 → SO 2 2SO 2 + O 2 → 2SO 3 SO 3 + H 2 O → H 2 SO 4 NH 3 + H 2 SO 4 → NH 4 HSO 4 NH 4 HSO 4 + NH 3 → (NH 4 ) 2 SO 4 For the above reaction The amount of ammonia gas is calculated in the arithmetic circuit 102 based on the above reaction formula.
上記反応用アンモニアガスに余剰用アンモニアガスを
付加して、アンモニアガス注入量を決定する理由は、ア
ンモニアガスが不足した場合には次式の反応が右に進み (NH4)2SO4NH3+NH4HSO4 酸性硫安NH4HSO4を生成してEPに悪影響を及ぼすため
である。The reason for determining the injection amount of ammonia gas by adding excess ammonia gas to the above-mentioned reaction ammonia gas is that when ammonia gas is insufficient, the reaction of the following equation proceeds to the right (NH 4 ) 2 SO 4 NH 3 This is because + NH 4 HSO 4 generates acidic ammonium sulfate NH 4 HSO 4 and adversely affects EP.
従来の装置においては、アンモニアガス濃度計の反応
速度が遅い(約10〜40分)ため、通常の比例積分微分制
御では適量のアンモニアガスを注入することができなか
つた。In the conventional apparatus, the reaction rate of the ammonia gas concentration meter is slow (about 10 to 40 minutes), so that it is impossible to inject an appropriate amount of ammonia gas by ordinary proportional-integral-derivative control.
また、硫黄分の燃焼によつて発生するボイラ排ガス中
に含まれるSO3の濃度変化には、経時的にゆるやかに増
大する部分(年間100%程度増加)とボイラの運転状態
や空気過剰率や温度等によつて急激に変化する部分があ
るが、従来の装置ではこれらに十分対応することができ
なかつた。Further, the change in concentration of SO 3 contained in the boiler exhaust gas by connexion generated in the combustion of sulfur over time gently portion (annual about 100% increase) to increase the Ya operating state or the excess air ratio of the boiler Although there are portions that change rapidly depending on the temperature and the like, the conventional apparatus cannot sufficiently cope with these.
上記SO3濃度のゆるやかな増大は、ボイラの使用時間
に伴つてボイラ内に蓄積される重金属が増加し、これが
SO2をSO3に転化させる触媒として作用するためである。The gradual increase in the above SO 3 concentration increases the amount of heavy metals accumulated in the boiler with the operating time of the boiler,
This is because it acts as a catalyst for converting SO 2 to SO 3 .
本発明は、上記の課題を解決し、常時適量のアンモニ
アガスを注入し、余剰アンモニアガス量を最小限に抑
え、ランニングコストが低減できる装置を提供しようと
するものである。An object of the present invention is to solve the above-described problems and to provide an apparatus capable of constantly injecting an appropriate amount of ammonia gas, minimizing the amount of excess ammonia gas, and reducing running costs.
本発明の制御装置は、反応用アンモニアガス量信号を
燃料中の硫黄分設定値信号によつて補正する演算器を備
えアンモニア注入量信号を出力する制御装置において、
アンモニアガス濃度設定器が出力する余剰アンモニアガ
ス濃度設定値信号とアンモニアガス濃度計が出力するア
ンモニアガス濃度信号を入力する比較器、同比較器が出
力する偏差信号を入力し上限及び下限設定値を越えた偏
差信号を選択する高低信号選択器、同高低信号選択器が
出力した信号を入力し上記偏差信号が上限及び下限設定
値を越えた時間に比例した転化率補正信号を出力し同信
号を上記演算器に入力させる積分調節器を備えたことを
特徴としている。The control device of the present invention is a control device that includes an arithmetic unit that corrects a reaction ammonia gas amount signal using a sulfur content set value signal in fuel and outputs an ammonia injection amount signal.
A comparator that inputs a surplus ammonia gas concentration set value signal output by the ammonia gas concentration setter and an ammonia gas concentration signal output by the ammonia gas concentration meter, and inputs a deviation signal output by the comparator to set upper and lower limit values. A high / low signal selector for selecting a deviation signal that has exceeded the signal output by the high / low signal selector, and outputs a conversion rate correction signal proportional to the time when the deviation signal exceeds the upper and lower limit set values, and outputs the same signal. The present invention is characterized in that an integration adjuster for inputting to the arithmetic unit is provided.
上記において、アンモニアガス濃度設定器より余剰ア
ンモニアガス濃度設定値信号を入力し、アンモニアガス
濃度計よりアンモニアガス濃度信号を入力した比較器
は、偏差信号を出力する。同偏差信号を入力した高低信
号選択器は上限又は下限設定値を越えた偏差信号を選択
し、積分調節器へ信号を出力する。同積分調節器は上記
信号を入力し、上記偏差信号が上限又は下限設定値を越
えた時間に比例した転化率補正信号を出力し、同転化率
補正信号は演算器に入力される。同演算器は入力された
反応用アンモニアガス量信号を燃料中の硫黄分設定値信
号により補正すると共に、上記転化率補正信号によつて
補正し、制御装置が適正なアンモニアガス注入量信号を
出力する。上記により、比較的変化の早い通常のSO3濃
度変化に対応した制御とは別に、転化率補正信号を演算
器に入力することによつて経時的なSO2よりSO3への転化
率のゆるやかな増大に対する制御が行えるようになつた
ため、余剰アンモニアガス量を最小限に抑えてアンモニ
アガス注入が行える制御装置が実現できた。In the above description, the comparator that receives the surplus ammonia gas concentration set value signal from the ammonia gas concentration setter and the ammonia gas concentration signal from the ammonia gas concentration meter outputs the deviation signal. The high / low signal selector which has input the same deviation signal selects a deviation signal exceeding the upper limit or lower limit set value, and outputs a signal to the integration controller. The integrator receives the above signal, and outputs a conversion rate correction signal proportional to the time when the deviation signal exceeds the upper limit or lower limit set value. The conversion rate correction signal is input to the calculator. The arithmetic unit corrects the input ammonia gas amount signal for the reaction with the sulfur content set value signal and the conversion rate correction signal, and the control device outputs an appropriate ammonia gas injection amount signal. I do. By the above, apart from the control corresponding to the normal change of the SO 3 concentration which changes relatively quickly, the conversion rate of the conversion from SO 2 to SO 3 with time can be gradually reduced by inputting the conversion rate correction signal to the calculator. As a result, a control device capable of minimizing the amount of excess ammonia gas and injecting ammonia gas was realized.
本発明の一実施例を第1図に示す。 One embodiment of the present invention is shown in FIG.
本実施例においては、比較器から信号がフイードバツ
クされる部分以外は、従来の装置と同様のため説明を省
略する。The present embodiment is the same as the conventional device except for the part where the signal is fed back from the comparator, and therefore the description is omitted.
第1図に示す本実施例は、アンモニアガス濃度設定器
113が出力した余剰アンモニアガス濃度設定値信号3と
アンモニアガス濃度計111が出力したアンモニアガス濃
度信号2を入力し偏差信号4を出力する比較器115、上
記偏差信号4を高低信号選択器5を介して入力し転化率
補正信号8を出力する積分調節器7、反応用アンモニア
ガス量演算回路112より出力された反応用アンモニアガ
ス量信号1を入力し更に燃料中の硫黄分設定値信号120
と上記転化率補正信号8を入力して補正された反応用ア
ンモニアガス量信号9を出力する演算器6、余剰用アン
モニアガス量演算回路114より出力された余剰用アンモ
ニアガス量信号10を入力し上記余剰アンモニアガス濃度
設定値信号3により補正された余剰用アンモニアガス量
信号15を出力する演算器11、上記補正された反応用アン
モニアガス量信号9と上記余剰用アンモニアガス量信号
15を入力して加算しアンモニア量信号13を出力する加減
算器12、上記偏差信号4を入力した比例積分調節器16が
出力した補正用アンモニアガス量信号17を入力し補正用
余剰アンモニアガス量信号19を出力する高低設定器18、
および上記アンモニア量信号13と補正用余剰アンモニア
量信号19を入力してアンモニア注入量信号を出力する加
減算器14を備えている。This embodiment shown in FIG. 1 is an ammonia gas concentration setting device.
The comparator 115 receives the surplus ammonia gas concentration set value signal 3 output by 113 and the ammonia gas concentration signal 2 output by the ammonia gas concentration meter 111 and outputs a deviation signal 4. The comparator 115 outputs the deviation signal 4 to the high / low signal selector 5. An integration controller 7 for inputting a conversion rate correction signal 8 and a reaction ammonia gas amount signal 1 output from a reaction ammonia gas amount calculation circuit 112, and further receives a sulfur set value signal 120 for fuel.
And a conversion unit 6 for inputting the conversion rate correction signal 8 and outputting a corrected ammonia gas amount signal 9, and a surplus ammonia gas amount signal 10 output from a surplus ammonia gas amount calculation circuit 114. A computing unit 11 for outputting a surplus ammonia gas amount signal 15 corrected by the surplus ammonia gas concentration set value signal 3, the corrected ammonia gas amount signal 9 and the surplus ammonia gas amount signal
An adder / subtractor 12 for inputting and adding 15 to output an ammonia amount signal 13, a correction ammonia gas amount signal 17 output from a proportional-integral controller 16 to which the deviation signal 4 is input, and a correction excess ammonia gas amount signal for inputting High / low setting device 18, which outputs 19,
Further, there is provided an adder / subtractor 14 which receives the ammonia amount signal 13 and the correction excess ammonia amount signal 19 and outputs an ammonia injection amount signal.
上記において、比較器115から出力された余剰アンモ
ニアガス設定値信号3とアンモニアガス濃度信号2の偏
差信号4は高低信号選択器5に入力される。同高低信号
選択器5は、上記偏差信号4が同選択器5に設定された
上限値又は加減値を越えた場合に信号を積分調節器7へ
出力し、同調節器7は上記上限値又は下限値を越えた時
間に比例した転化率補正信号8を出力する。同転化率補
正信号8は、反応用アンモニアガス量信号1と硫黄分設
定値信号120を入力した演算器6に入力され、同演算器
6は補正された反応用アンモニアガス量信号9を出力す
る。In the above, the excess ammonia gas set value signal 3 output from the comparator 115 and the deviation signal 4 of the ammonia gas concentration signal 2 are input to the high / low signal selector 5. The height signal selector 5 outputs a signal to the integration controller 7 when the deviation signal 4 exceeds an upper limit or an adjustment value set in the selector 5, and the controller 7 outputs the signal to the integration controller 7. The conversion rate correction signal 8 proportional to the time exceeding the lower limit is output. The conversion rate correction signal 8 is input to an arithmetic unit 6 to which the reaction ammonia gas amount signal 1 and the sulfur set value signal 120 have been input, and the arithmetic unit 6 outputs a corrected reaction ammonia gas amount signal 9. .
上記高低信号選択器5においては、偏差信号が上限値
又は下限値を越えた場合に信号を積分調節器7へ送り、
同調節器7は上記偏差信号が上限値又は下限値を越えた
時間に比例した転化率補正信号8を出力しているため、
通常の排ガス中のアンモニアガス濃度の変化には応答せ
ず、経時的なゆるやかな変化が一定の値を越えた段階で
はじめて補正が行われる。In the high / low signal selector 5, when the deviation signal exceeds the upper limit value or the lower limit value, the signal is sent to the integration controller 7,
Since the controller 7 outputs the conversion rate correction signal 8 proportional to the time when the deviation signal exceeds the upper limit value or the lower limit value,
It does not respond to a change in the concentration of ammonia gas in normal exhaust gas, and correction is performed only when a gradual change with time exceeds a certain value.
上記演算器6より出力された補正された反応用アンモ
ニアガス量信号9は、余剰用アンモニアガス量演算回路
114が出力し演算器11によつて補正された余剰用アンモ
ニアガス量信号15が加減算器12によつて加算され、同加
減算器12はアンモニア量信号13を出力し加減算器14に入
力する。The corrected ammonia gas amount signal for reaction 9 output from the arithmetic unit 6 is used as a surplus ammonia gas amount operation circuit.
The surplus ammonia gas amount signal 15 output by 114 and corrected by the arithmetic unit 11 is added by the adder / subtractor 12, and the adder / subtractor 12 outputs the ammonia amount signal 13 and inputs it to the adder / subtractor 14.
また、上記比較器115が出力した偏差信号4は比例積
分調節器16に入力され、同調節器16は通常比較的変化の
早いSO3の濃度変化に対応した補正用アンモニアガス量
信号17を出力する。同補正用アンモニアガス量信号17は
高低設定器18に入力される。同高低設定器18は、上記ア
ンモニア濃度計111の応答遅れによる極端なアンモニア
注入量の過多不足を生じないように、上記補正用アンモ
ニアガス量信号17に制限を加えた補正用余剰アンモニア
ガス量信号19を出力する。The deviation signal 4 output from the comparator 115 is input to a proportional-integral controller 16, and the controller 16 outputs a correction ammonia gas amount signal 17 corresponding to a change in the concentration of SO 3 which usually changes relatively quickly. I do. The correction ammonia gas amount signal 17 is input to the height setting device 18. The height setting device 18 is a correction excess ammonia gas amount signal obtained by adding a limit to the correction ammonia gas amount signal 17 so as not to cause an excessive excessive or insufficient ammonia injection amount due to a response delay of the ammonia concentration meter 111. Outputs 19.
上記補正用余剰アンモニアガス量信号19は上記加減算
器14に入力され、同加減算器14は上記補正用余剰アンモ
ニアガス量信号19により上記アンモニア量信号13を補正
し、アンモニア注入量信号20を出力する。The correction excess ammonia gas amount signal 19 is input to the adder / subtractor 14, which corrects the ammonia amount signal 13 with the correction excess ammonia gas amount signal 19 and outputs an ammonia injection amount signal 20. .
上記により、経時的なSO2よりSO3への転化率のゆるや
かな増大に対する制御と比較的変化の早い通常のSO3の
濃度変化に対応した制御とがそれぞれ行えるようになつ
たため、余剰アンモニアガス量を最小限に抑えてアンモ
ニアガス注入が行える制御装置が実現できた。The above, since the control and has come to allow each corresponding to temporal changes in the concentration of early normal SO 3 relatively change control for gradual increase in the conversion of from SO 2 to SO 3, excess ammonia gas A control device capable of injecting ammonia gas with a minimum amount was realized.
本発明は、反応用アンモニアガス量信号が硫黄分設定
値信号によつて補正される演算器を備えアンモニア注入
量信号を出力する制御装置において、余剰アンモニアガ
ス濃度設定値信号とアンモニア濃度信号を入力する比較
器より偏差信号を高低信号選択器を介して入力し上記演
算器に入力される転化率補正信号を出力する積分調節器
を備えたことによつて、比較的変化の早い通常のSO3濃
度変化に対応した制御とは別に転化率補正信号を演算器
に入力することによつて経時的なSO2よりSO3への転化率
のゆるやかな増大に対する制御が行えるようになつたた
め、余剰アンモニアガス量を最小限に抑えてアンモニア
ガス注入が行える制御装置が実現できた。The present invention relates to a control device for outputting an ammonia injection amount signal, comprising a computing unit in which a reaction ammonia gas amount signal is corrected by a sulfur content set value signal, and receiving an excess ammonia gas concentration set value signal and an ammonia concentration signal. Yotsute that with a deviation signal from the comparator input via a high and low signal selector integral controller for outputting a conversion factor correction signal input to the calculator for, early normal SO 3 relatively-changing since the control corresponding to the change in concentration has decreased to allow control over the separate conversion of the correction signal a gradual increase in the conversion to sO 3 than by connexion temporal sO 2 to be entered into the calculator, the excess ammonia A control device capable of injecting ammonia gas with a minimum amount of gas has been realized.
第1図は本発明の一実施例の説明図、第2図はアンモニ
アガス注入脱硫装置の説明図、第3図は従来の装置の説
明図である。 1……反応用アンモニアガス量信号、2……アンモニア
ガス濃度信号、3……余剰アンモニアガス濃度設定値信
号、4……偏差信号、5……高低信号選択器、6……演
算器、7……積分調節器、8……転化率補正信号、9…
…反応用アンモニアガス量信号、10……余剰用アンモニ
アガス量信号、11……演算器、12……加減算器、13……
アンモニア量信号、14……加減算器、15……余剰用アン
モニアガス量信号、16……比例積分調節器、17……補正
用アンモニアガス量信号、18……高低設定器、19……補
正用余剰アンモニアガス量信号、20……アンモニアガス
注入量信号、101……燃料流量信号、111……アンモニア
ガス濃度計、112……反応用アンモニアガス量信号、113
……アンモニアガス濃度設定器、114……余剰用アンモ
ニアガス量演算回路、115……比較器。FIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2 is an explanatory view of an ammonia gas injection desulfurization apparatus, and FIG. 3 is an explanatory view of a conventional apparatus. 1 ... Ammonia gas amount signal for reaction, 2 ... Ammonia gas concentration signal, 3 ... Surplus ammonia gas concentration set value signal, 4 ... Deviation signal, 5 ... High / low signal selector, 6 ... Computing unit, 7 ... Integral controller, 8 ... Conversion rate correction signal, 9 ...
... Ammonia gas amount signal for reaction, 10 ... Ammonia gas amount signal for surplus, 11 ... Calculator, 12 ... Adder / subtractor, 13 ...
Ammonia amount signal, 14 ... Adder / subtracter, 15 ... Surplus ammonia gas amount signal, 16 ... Proportional integration controller, 17 ... Correction ammonia gas amount signal, 18 ... High / low setting device, 19 ... Correction Excess ammonia gas amount signal, 20 ... ammonia gas injection amount signal, 101 ... fuel flow rate signal, 111 ... ammonia gas concentration meter, 112 ... reaction ammonia gas amount signal, 113
... Ammonia gas concentration setting device, 114... Surplus ammonia gas amount calculation circuit, 115.
Claims (1)
黄分設定値信号によつて補正する演算器を備えアンモニ
ア注入量信号を出力する制御装置において、アンモニア
ガス濃度設定器が出力する余剰アンモニアガス濃度設定
値信号とアンモニアガス濃度計が出力するアンモニアガ
ス濃度信号を入力する比較器、同比較器が出力する偏差
信号を入力し上限又は下限設定値を越えた偏差信号を選
択する高低信号選択器、同高低信号選択器が出力した信
号を入力し上記偏差信号が上限又は下限設定値を越えた
時間に比例した転化率補正信号を出力し同信号を上記演
算器に入力させる積分調節器を備えたことを特徴とする
アンモニアガス注入量の制御装置。A control device for correcting an ammonia gas amount signal for reaction by a sulfur content set value signal in a fuel and outputting an ammonia injection amount signal; A comparator that inputs a gas concentration set value signal and an ammonia gas concentration signal output by an ammonia gas concentration meter, and a deviation signal that is input by the comparator and selects a deviation signal that exceeds the upper or lower limit set value. And an integration controller for inputting a signal output by the height signal selector, outputting a conversion rate correction signal proportional to the time when the deviation signal exceeds the upper limit or lower limit set value, and inputting the signal to the arithmetic unit. A control device for an ammonia gas injection amount, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1035023A JP2695654B2 (en) | 1989-02-16 | 1989-02-16 | Control device for ammonia gas injection volume |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1035023A JP2695654B2 (en) | 1989-02-16 | 1989-02-16 | Control device for ammonia gas injection volume |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02214521A JPH02214521A (en) | 1990-08-27 |
JP2695654B2 true JP2695654B2 (en) | 1998-01-14 |
Family
ID=12430460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1035023A Expired - Lifetime JP2695654B2 (en) | 1989-02-16 | 1989-02-16 | Control device for ammonia gas injection volume |
Country Status (1)
Country | Link |
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JP (1) | JP2695654B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5789321B2 (en) * | 2014-03-14 | 2015-10-07 | 川崎重工業株式会社 | Scrubber and engine system |
-
1989
- 1989-02-16 JP JP1035023A patent/JP2695654B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JPH02214521A (en) | 1990-08-27 |
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