JP3523442B2 - Furnace pressure control device - Google Patents
Furnace pressure control deviceInfo
- Publication number
- JP3523442B2 JP3523442B2 JP05876997A JP5876997A JP3523442B2 JP 3523442 B2 JP3523442 B2 JP 3523442B2 JP 05876997 A JP05876997 A JP 05876997A JP 5876997 A JP5876997 A JP 5876997A JP 3523442 B2 JP3523442 B2 JP 3523442B2
- Authority
- JP
- Japan
- Prior art keywords
- opening
- exhaust gas
- furnace
- damper
- rotation speed
- 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.)
- Expired - Fee Related
Links
Landscapes
- Control Of Fluid Pressure (AREA)
- Control Of Ac Motors In General (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Air Supply (AREA)
- Incineration Of Waste (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炉内圧制御装置に
関し、詳しくは、廃棄物焼却炉からの排ガスを煙突に案
内する排ガス路に排ガス用ダンパと、誘引送風機とを順
に設け、前記廃棄物処理炉の炉内圧を検出する炉内圧検
出手段を設けるとともに、前記炉内圧検出手段からの検
出炉内圧が目標炉内圧となるように前記排ガス用ダンパ
の開度を許容範囲で調節するダンパ開度調節手段と、前
記誘引送風機の回転数を制御する回転数調節手段とを設
けてある炉内圧制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace pressure control device, and more specifically, to a waste gas incinerator, an exhaust gas damper and an induced air blower are sequentially provided in an exhaust gas passage for guiding the exhaust gas from a waste incinerator to a chimney. A damper opening for adjusting the opening of the exhaust gas damper within an allowable range so that the furnace internal pressure detecting means for detecting the furnace internal pressure of the processing furnace is provided and the detected furnace internal pressure from the furnace internal pressure detecting means becomes the target furnace internal pressure. The present invention relates to a furnace pressure control device provided with adjusting means and rotation speed adjusting means for controlling the rotation speed of the induction blower.
【０００２】[0002]
【従来の技術】従来の廃棄物処理設備においては、廃棄
物処理炉の炉内圧を制御するのに、広範囲の誘引風量で
対応する必要があり、排ガス路に排ガス用ダンパを設け
て、その開度の調節及び誘引送風機の回転数の変更調節
によって風量の調節を計っており、前記排ガス用ダンパ
の開度が設定された許容範囲を外れる程に炉内圧が変化
した場合には、前記許容範囲外の領域の炉内圧の制御の
補完として誘引送風機の回転数を変更調節して、誘引風
量をさらに変化させる処置がとられている。前記排ガス
用ダンパは、その開度を炉内圧をフィードバック信号と
して調節しており、このための前記誘引送風機に対する
制御信号は、前記回転数を段階的に変更調節するもので
あった。つまり、図４に示すように、廃棄物処理炉１か
らの排ガスを煙突５に導く排ガス路２に、排ガス用ダン
パ３と誘引送風機４が順に設けられており、前記排ガス
用ダンパ３は、炉内圧検出手段１１が廃棄物処理炉１に
設けられた炉内圧センサ１１ａによって検出する炉内圧
（Ｐ）に基づき、その開度をＰＩＤ制御する開度設定部
１２ａを備えたダンパ開度調節手段１２により開度調節
されている。その排ガス用ダンパ３の開度（Ｚ）を前記
ダンパ開度調節手段１２の開度検出部１２ｂで検出し、
開度判定部１２ｃで許容範囲内にあるか否かを判定し、
その許容範囲を逸脱したことを判別部１３ａで検出する
と、前記誘引送風機４を駆動する誘導電動機を制御する
回転数調節手段１３の回転数設定部１３ｂに備えるイン
バータ制御機構１４からの出力周波数（Ｆ）を段階的に
変化して、前記開度（Ｚ）を前記許容範囲内に維持する
ようにしてある。この炉内圧制御は、例えば図５に示し
たような手順で行われている。つまり、炉内圧検出手段
１１で炉内圧（Ｐ）を検出し〈ステップ２−※１〉、開
度設定部１２ａで目標炉内圧（ＰS ）と比較する〈ステ
ップ２−※２〉。前記開度設定部１２ａでは、〈ステッ
プ２−※２〉での比較結果に基づき、炉内圧（Ｐ）が目
標炉内圧（ＰS ）よりも低い場合には、排ガス用ダンパ
３の開度を減少側に調節し〈ステップ２−※３．１〉、
前記炉内圧（Ｐ）が前記目標炉内圧（ＰS ）よりも高い
場合には、前記排ガス用ダンパ３の開度を増大側に調節
する〈ステップ２−※３．２〉。以上は、自動的に前記
開度設定部１２ａで前記炉内圧（Ｐ）の検出結果に基づ
き実行される。さらに、開度検出部１２ｂで前記排ガス
用ダンパ３の開度（Ｚ）を検出して〈ステップ２−※
４〉、開度判定部１２ｃで前記開度（Ｚ）を設定された
開度の許容範囲と対比して〈ステップ２−※５〉、前記
〈ステップ２−※５〉の結果を判別部１３ａで判別し
て、前記開度（Ｚ）が前記許容範囲の下限開度（Ｚl）
未満であれば、回転数設定部１３ｂで誘引送風機４の回
転数（Ｎ）を所定の変化量（ΔＮ）だけ減少し〈ステッ
プ２−※６．１〉、前記開度（Ｚ）が前記許容範囲の上
限開度（Ｚu ）を超えていれば、前記誘引送風機４の回
転数（Ｎ）を所定の変化量（ΔＮ）だけ増加する〈ステ
ップ２−※６．２〉。以上のサイクルを所定時間間隔で
繰り返すのである。例をあげれば、前記排ガス用ダンパ
の開度の許容範囲が３５〜６５％に設定され、前記誘引
送風機をインバータ制御して、１０〜６０Ｈｚの周波数
範囲で駆動している場合に、前記排ガス用ダンパの開度
が６５％を超えれば、前記インバータ制御機構１４の出
力周波数を例えば５Ｈｚ増加するというような段階的制
御が行われている。前記開度が３５％未満になると、前
記インバータ制御機構１４の出力周波数を例えば５Ｈｚ
減少する。その結果、前記誘引送風機４の回転数（Ｎ）
は約１０秒の間に段階的に変更調節する。上記排ガス用
ダンパの開度の検出は、例えば１０秒間隔で繰り返され
る。2. Description of the Related Art In a conventional waste treatment facility, it is necessary to control the internal pressure of the waste treatment furnace with a wide range of induced air flow. The amount of air is adjusted by adjusting the degree of rotation and changing the number of revolutions of the induction blower, and when the furnace pressure changes to such an extent that the opening degree of the exhaust gas damper deviates from the set allowable range, the allowable range is set. As a supplement to the control of the furnace pressure in the outside area, the rotation speed of the induction blower is changed and adjusted to further change the amount of induction air. The exhaust gas damper adjusts the opening of the exhaust gas damper as a feedback signal, and the control signal for the induction blower for this purpose is to adjust the rotation speed stepwise. That is, as shown in FIG. 4, an exhaust gas damper 3 and an induction blower 4 are sequentially provided in an exhaust gas passage 2 that guides the exhaust gas from the waste treatment furnace 1 to the chimney 5, and the exhaust gas damper 3 is a furnace. The damper opening degree adjusting means 12 including an opening degree setting section 12a for PID controlling the opening degree based on the furnace pressure (P) detected by the furnace pressure sensor 11a provided in the waste treatment furnace 1 by the inner pressure detecting means 11 The opening is adjusted by. The opening degree (Z) of the exhaust gas damper 3 is detected by the opening degree detection section 12b of the damper opening degree adjusting means 12,
The opening determination unit 12c determines whether or not it is within the allowable range,
When the discriminating unit 13a detects that the allowable range is exceeded, the output frequency (F) from the inverter control mechanism 14 provided in the rotational speed setting unit 13b of the rotational speed adjusting unit 13 that controls the induction motor that drives the induction blower 4 is detected. ) Is gradually changed to maintain the opening (Z) within the allowable range. This furnace pressure control is performed in the procedure as shown in FIG. 5, for example. In other words, detecting the furnace inner pressure (P) in a furnace pressure detection means 11 <Step 2-※ 1>, is compared with the target furnace pressure (P S) at the degree of opening setting unit 12a <Step 2-※ 2>. In the degree of opening setting unit 12a, based on a comparison result in <Step 2-※ 2>, furnace pressure (P) is lower than the target furnace pressure (P S) is the opening of the exhaust gas damper 3 Adjust to the decreasing side <Step 2- * 3.1>,
When the furnace pressure (P) is higher than the target furnace pressure (P S) adjusts the opening degree of the exhaust gas damper 3 to the side of increase <Step 2-※ 3.2>. The above is automatically executed by the opening degree setting unit 12a based on the detection result of the furnace pressure (P). Further, the opening degree detection unit 12b detects the opening degree (Z) of the exhaust gas damper 3 and <Step 2- *
4>, the opening degree determination unit 12c compares the opening degree (Z) with an allowable range of the set opening degree <Step 2- * 5>, and the result of <Step 2- * 5> is determined by the determination section 13a. And the opening (Z) is the lower limit opening (Z l ) of the allowable range.
If it is less than the above, the rotation speed setting unit 13b decreases the rotation speed (N) of the induction blower 4 by a predetermined change amount (ΔN) <step 2- * 6.1>, and the opening degree (Z) is the allowable value. If it exceeds the upper limit opening (Z u ) of the range, the number of revolutions (N) of the induction blower 4 is increased by a predetermined change amount (ΔN) <step 2- * 6.2>. The above cycle is repeated at predetermined time intervals. For example, when the allowable range of the opening degree of the exhaust gas damper is set to 35 to 65%, and the induction blower is inverter-controlled to drive in the frequency range of 10 to 60 Hz, When the opening degree of the damper exceeds 65%, stepwise control is performed such that the output frequency of the inverter control mechanism 14 is increased by, for example, 5 Hz. When the opening degree is less than 35%, the output frequency of the inverter control mechanism 14 is, for example, 5 Hz.
Decrease. As a result, the number of revolutions (N) of the induction blower 4
Changes gradually in about 10 seconds. The detection of the opening degree of the exhaust gas damper is repeated, for example, at intervals of 10 seconds.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の炉内圧の制
御においては、炉内圧（Ｐ）、排ガス用ダンパ３の開度
（Ｚ）、誘引送風機制御用に設けられた回転数調節手段
１３に備えるインバータ制御機構１４の出力周波数
（Ｆ）及び前記誘引送風機４の回転数（Ｎ）は、例えば
炉内圧が変化を示した場合に、図６に示すような挙動を
示す。つまり、排ガス用ダンパ３の開度（Ｚ）は、炉内
圧（Ｐ）の変化に応答して変化するが、例えば図示した
ように、炉内のゴミ質の変動等の原因によって炉内圧が
一時的な変化を示して、所定時間間隔で検出される前記
開度（Ｚ）が許容範囲の上限を一旦超えると、前記誘引
送風機４の回転数（Ｎ）は、前記開度（Ｚ）が許容範囲
の下限未満になるまで前記回転数（Ｎ）は変更調節され
ない。その結果、前記回転数（Ｎ）が過剰であれば、前
記開度（Ｚ）が許容範囲の下限未満になるまで炉内圧
（Ｐ）は低下を続けるようになる。このように、排ガス
用ダンパの開度を許容範囲内に維持するだけのために誘
引送風機の回転数を変更調節しているが、その結果、排
ガス用ダンパの開度の一回の変化幅を、その許容範囲全
体に広げている。従って、炉内圧の変動も範囲が広くな
っており、炉内圧の安定制御には好ましくない結果をも
たらしている。また、前記出力周波数（Ｆ）の変化幅が
大きいと、前記排ガス用ダンパ３の開度（Ｚ）が許容範
囲の一方の限界を超えると、前記出力周波数（Ｆ）の変
化に伴って、前記誘引送風機の回転数が過剰になり、過
剰な吸引を続けるために、短時間で反対方向の前記許容
範囲の限界に近づくことになる。従って、この場合に
は、炉内圧が元に戻っても、前記許容範囲内では再び前
記回転数を逆方向に変化させる制御が機能しないため
に、反対側の限界に達するまで前記誘引送風機の回転数
の変更調節が行われず、ハンチングを招くこともある。
また、前記回転数の変化の度合いが低すぎた場合には、
図７に示すように、前記排ガス用ダンパの開度が、前記
許容範囲を逸脱した側の限界に近く静定されるようにな
る結果、その後、炉内圧が前記逸脱した側に僅かな変化
を示しても再び前記回転数を同じ方向に変化させなけれ
ばならない。これは、炉内圧が広い範囲にわたって変化
する場合も同様である。しかも、前記回転数を戻す方向
に変化するのは、前記許容範囲を逸脱した側の反対側に
前記ダンパ開度が逸脱したときであり、結果として炉内
圧を大きく変化させることになるという、炉内圧制御の
安定性に関する問題を有している。さらに、前記回転数
の変化の際には、誘引送風機の発生する騒音が大きくな
り、これは変化幅が大きくなるに伴って大きくなる。ま
た、前記回転数の変更調節の段階幅を大きくすれば、前
記のようにハンチング現象の原因となりやすく、その際
に発生する騒音も大きくなる。つまり、前記回転数が段
階的に変化すると、炉内圧力の過渡的な変化を伴い、燃
焼の安定性に悪影響を及ぼすという問題があり、さら
に、前記回転数を変更調節する際には、騒音が大きくな
るという問題がある。例えば、ゴミ質の変動により、ダ
ンパ開度上限側或いは下限側で、ダンパが急激に上方或
いは下方に変動した場合には、ダンパと誘引送風機を駆
動する電動機との制御特性の差により、遅れの大きいダ
ンパの追従が不十分で、電動機の回転数の変更が繰り返
し行われることになり、繰り返し高い騒音を発生するこ
とになる。また、ダンパ開度上限側或いは下限側で、ダ
ンパが急激に下方或いは上方に変動した場合には、ダン
パがダンパ開度上限側或いは下限側から下限側或いは上
限側の限界に変動するまで電動機回転数の変更調節が行
われず、ダンパ開度の変化幅が大きいことから応答遅れ
が大きくなり、炉内圧の不安定やダンパ及び誘引送風機
の制御のハンチング現象をもたらすことになりやすい。
そこで、本発明の炉内圧制御装置は、上記の問題点を解
決し、騒音の防止を図りながら、簡単な構成で炉内圧を
安定して制御することを可能にする制御手段を提供する
ことを目的とする。In the conventional control of the furnace pressure, the furnace pressure (P), the opening degree (Z) of the exhaust gas damper 3, and the rotation speed adjusting means 13 provided for controlling the induction blower are used. The output frequency (F) of the provided inverter control mechanism 14 and the rotation speed (N) of the induction blower 4 exhibit the behavior as shown in FIG. 6 when the furnace pressure changes, for example. That is, the opening degree (Z) of the exhaust gas damper 3 changes in response to the change in the furnace pressure (P). Once the opening (Z) detected at a predetermined time interval exceeds the upper limit of the allowable range, the rotation speed (N) of the induction blower 4 is allowed to be the opening (Z). The rotational speed (N) is not adjusted until it is below the lower limit of the range. As a result, if the rotational speed (N) is excessive, the furnace pressure (P) will continue to decrease until the opening (Z) falls below the lower limit of the allowable range. In this way, the rotation speed of the induction blower is changed and adjusted only to maintain the opening degree of the exhaust gas damper within the allowable range. , Has widened its entire tolerance range. Therefore, the range of fluctuations in the furnace pressure is also wide, which is not desirable for stable control of the furnace pressure. Further, when the change width of the output frequency (F) is large, and the opening degree (Z) of the exhaust gas damper 3 exceeds one limit of the allowable range, the output frequency (F) changes in accordance with the change of the output frequency (F). Since the rotation speed of the induction blower becomes excessive and excessive suction is continued, the limit of the allowable range in the opposite direction is approached in a short time. Therefore, in this case, even if the furnace pressure returns to the original value, the control for changing the rotation speed in the opposite direction does not function again within the allowable range, and therefore the rotation of the induction blower reaches the limit on the opposite side. The number may not be adjusted and adjustment may result in hunting.
If the degree of change in the rotational speed is too low,
As shown in FIG. 7, as a result that the opening degree of the exhaust gas damper is settled close to the limit on the side deviating from the permissible range, as a result, the furnace pressure slightly changes to the deviating side. Even if it is shown, it is necessary to change the rotation speed again in the same direction. This is also the case when the furnace pressure changes over a wide range. Moreover, it is when the damper opening deviates to the side opposite to the side deviating from the allowable range that the rotational speed is changed in the direction of returning, and as a result, the furnace internal pressure is largely changed. There is a problem regarding the stability of internal pressure control. Furthermore, when the rotational speed changes, the noise generated by the induction blower increases, and the noise increases as the change width increases. Further, if the step width for changing and adjusting the rotational speed is increased, the hunting phenomenon is likely to occur as described above, and the noise generated at that time also increases. That is, when the rotational speed is changed in a stepwise manner, there is a problem that the internal pressure of the furnace is transiently changed, and the stability of combustion is adversely affected. There is a problem that becomes large. For example, when the damper suddenly moves upward or downward on the upper limit side or the lower limit side of the damper opening due to fluctuations in dust quality, a delay may occur due to a difference in control characteristics between the damper and the electric motor that drives the induction blower. The follow-up of the large damper is insufficient, and the rotation speed of the electric motor is repeatedly changed, which repeatedly causes high noise. In addition, when the damper suddenly moves downward or upward on the upper limit side or lower limit side of the damper opening, the motor rotation is continued until the damper changes from the upper limit side or lower limit side of the damper opening to the lower limit side or upper limit side. Since the number of adjustments is not changed and the range of change in the damper opening is large, the response delay becomes large, and the instability of the furnace pressure and the hunting phenomenon of the control of the damper and the induction blower are likely to occur.
Therefore, the reactor internal pressure control device of the present invention is to solve the above problems, to provide a control means that enables stable control of the reactor internal pressure with a simple configuration while preventing noise. To aim.
【０００４】[0004]
上記第１特徴構成によれば、誘引送風機の回転数の変更
調節の時間間隔を拡大しながら、排ガス用ダンパの開度
を安定して制御できるようになる。つまり、前記排ガス
用ダンパの開度が許容範囲を逸脱した場合に、前記排ガ
ス用ダンパの開度が前記許容範囲内に設定された基準開
度に調節されるように、前記誘引送風機の回転数を調節
するので、前記誘引送風機の回転数の変更調節後は、前
記排ガス用ダンパの開度は、開閉両方向に余裕を有する
位置に静定されることになる。従って、次に前記開度が
前記許容範囲を逸脱するまでの余裕を両側に有するの
で、炉内圧の変化によって直ちに回転数の変化を要求す
ることを防止でき、誘引送風機回転数の変更調節の頻度
を減少できる。当然ながらハンチング現象は確実に防止
できる。その結果、誘引送風機回転数の変更調節の頻度
を減少して騒音の防止を図りながら、簡単な構成で炉内
圧を安定して制御することが可能になった。According to the first characteristic configuration, it is possible to stably control the opening degree of the exhaust gas damper while expanding the time interval for changing and adjusting the rotation speed of the induction blower. That is, when the opening degree of the exhaust gas damper deviates from the allowable range, the rotation speed of the induction blower is adjusted so that the opening degree of the exhaust gas damper is adjusted to the reference opening degree set within the allowable range. Therefore, after changing and adjusting the rotation speed of the induction blower, the opening degree of the exhaust gas damper is settled to a position having a margin in both opening and closing directions. Therefore, next, since there is a margin until the opening deviates from the permissible range on both sides, it is possible to prevent the immediate change of the rotational speed due to the change of the furnace pressure, and the frequency of the change adjustment of the induced blower rotational speed. Can be reduced. As a matter of course, the hunting phenomenon can be surely prevented. As a result, it has become possible to stably control the furnace pressure with a simple structure while reducing the frequency of change and adjustment of the induction blower rotation speed to prevent noise.
【０００５】〔第２特徴構成及び作用効果〕尚、本発明
の炉内圧制御装置の第２特徴構成は、請求項２に記載の
如く、前記第１特徴構成における許容範囲を、排ガス用
ダンパの線形動作領域に対応する開度の範囲とする点に
あり、このようにすれば、前記排ガス用ダンパは、開閉
制御が容易になる。その結果、簡単な構成で炉内圧を一
層安定して制御することが可能になる。[Second Characteristic Configuration and Operation and Effect] The second characteristic configuration of the reactor internal pressure control device according to the present invention is, as described in claim 2, the allowable range of the first characteristic configuration, the exhaust gas damper of the This is in the range of the opening degree corresponding to the linear operation region. By doing so, the opening / closing control of the exhaust gas damper becomes easy. As a result, the furnace pressure can be controlled more stably with a simple structure.
【０００６】〔第３特徴構成及び作用効果〕また、本発
明の炉内圧制御装置の第３特徴構成は、請求項３に記載
の如く、前記第１特徴構成又は前記第２特徴構成におけ
る基準開度を、排ガス用ダンパの開度の許容範囲の中央
又はその近傍に設定された開度とする点にあり、これに
よって、誘引送風機の回転数の変更調節の要求頻度を減
少でき、ハンチング現象も確実に防止できるようにな
る。つまり、誘引送風機の回転数を変更調節した後に静
定する前記排ガス用ダンパの開度は、開閉両側にほぼ同
じ幅の余裕度を有しており、前記静定後の炉内圧が上昇
降下何れの方向に変化しても、次に前記開度が許容範囲
を逸脱するまでの余裕を有している。その結果、騒音の
防止を図りながら、簡単な構成で炉内圧を安定して制御
することが容易になる。[Third Characteristic Configuration and Working Effect] Further, a third characteristic configuration of the reactor internal pressure control device of the present invention is, as described in claim 3, a reference opening in the first characteristic configuration or the second characteristic configuration. Is the opening set at or near the center of the allowable range of the opening of the exhaust gas damper, which can reduce the frequency of requests to change and adjust the rotational speed of the induction fan, and also prevent hunting. It will be possible to surely prevent it. That is, the opening degree of the exhaust gas damper, which is settled after the rotational speed of the induction blower is changed and adjusted, has a margin of substantially the same width on both sides of opening and closing, and the furnace pressure after the settling rises or falls. Even if it changes in the direction of, there is a margin until the opening degree next deviates from the allowable range. As a result, it becomes easy to stably control the furnace pressure with a simple structure while preventing noise.
【０００７】〔第４特徴構成及び作用効果〕さらに、本
発明の炉内圧制御装置の第４特徴構成は、請求項４に記
載の如く、前記第１〜３特徴構成の何れかにおける回転
数調節手段にインバータ制御機構を設けて、前記インバ
ータ制御機構からの出力周波数を、排ガス用ダンパの、
ダンパ開度調節手段からの制御信号への追従特性から定
められる変化率の範囲内で変化させるように構成してあ
る点にあり、騒音の低下を果たしながら、排ガス用ダン
パの静定以前の次の回転数の変化を防止できるので、制
御が安定するようになる。これは排ガス用ダンパの開度
変化動作と協調して誘引送風機の回転数を変更調節でき
るかである。つまり、ダンパ機構の制御応答遅れは一般
に大きく、炉内圧を検出して前記排ガス用ダンパをＰＩ
Ｄ制御している場合においても、誘引送風機の回転数の
変化速度が早ければ、応答遅れに伴いアンダーシュート
を起こしやすくなり、これを防止するために制御応答速
度を高めればオーバーシュートを起こしやすくなり、結
果として、前記排ガス用ダンパの開度が静定前に前記許
容範囲から逸脱する場合がある。そこで前記回転数の変
化速度を排ガス用ダンパの応答速度に整合させるように
するのである。このようにすれば、前記誘引送風機の回
転数を緩やかに変化させながら、その回転数の変更調節
要求の回数を減少することができるようになる。しか
も、前記回転数の変化速度を緩やかにすることによって
騒音のレベルを引き下げることが可能となる。その結
果、騒音の防止を一層確実にしながら、簡単な構成で炉
内圧を一層安定して制御することが可能になる。[Fourth Characteristic Configuration and Operation and Effect] Furthermore, the fourth characteristic configuration of the reactor internal pressure control device of the present invention is, as described in claim 4, the rotation speed adjustment in any one of the first to third characteristic configurations. By providing an inverter control mechanism in the means, the output frequency from the inverter control mechanism, the exhaust gas damper,
It is configured to change within the range of the rate of change determined by the follow-up characteristic to the control signal from the damper opening adjusting means, and while reducing the noise, the next Since it is possible to prevent the change in the number of revolutions, the control becomes stable. This is whether or not the rotational speed of the induction blower can be changed and adjusted in cooperation with the operation of changing the opening of the exhaust gas damper. That is, the control response delay of the damper mechanism is generally large, and the exhaust gas damper is detected as PI by detecting the reactor internal pressure.
Even in the case of D control, if the speed of change of the number of revolutions of the induction blower is fast, an undershoot is likely to occur due to a response delay, and if a control response speed is increased to prevent this, an overshoot is likely to occur. As a result, the opening degree of the exhaust gas damper may deviate from the permissible range before settling. Therefore, the changing speed of the rotational speed is matched with the response speed of the exhaust gas damper. With this configuration, it is possible to gradually change the number of revolutions of the induction blower and reduce the number of requests for changing and adjusting the number of revolutions. Moreover, the level of noise can be lowered by slowing down the changing speed of the rotational speed. As a result, it is possible to more stably control the internal pressure of the furnace with a simple structure while further preventing noise.
【０００８】[0008]
【発明の実施の形態】上記本発明の炉内圧制御装置の実
施の形態の一例について、以下に、図面を参照しながら
説明する。尚、前記従来の技術において説明した要素と
同じ要素及び現象の値並びに同等の機能を有する要素に
関しては、先の図４〜図７に付したと同一の符号を付
し、詳細の説明の一部は省略する。BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the furnace pressure control device of the present invention will be described below with reference to the drawings. Incidentally, the same elements as those explained in the above-mentioned conventional technique, the values of the phenomena and the elements having the same functions are designated by the same reference numerals as those shown in FIGS. Parts are omitted.
【０００９】本発明の炉内圧制御装置を廃棄物焼却設備
に適用した例を図１に示す。廃棄物処理炉１の一例であ
る廃棄物焼却炉から煙突５に至る構成は、図４に示した
と同様である。炉内圧制御装置１０は、前記廃棄物焼却
炉１の炉内圧（Ｐ）を検出する炉内圧検出手段１１と、
排ガス用ダンパ３の開度を調節するダンパ開度調節手段
１２と、誘引送風機４の回転数を調節する回転数調節手
段１３とからなっている。FIG. 1 shows an example in which the furnace pressure control device of the present invention is applied to a waste incineration facility. The structure from the waste incinerator, which is an example of the waste treatment furnace 1, to the chimney 5 is the same as that shown in FIG. The furnace pressure control device 10 includes a furnace pressure detection unit 11 that detects a furnace pressure (P) of the waste incinerator 1.
It is composed of a damper opening adjustment means 12 for adjusting the opening of the exhaust gas damper 3 and a rotation speed adjustment means 13 for adjusting the rotation speed of the induction blower 4.
【００１０】前記回転数調節手段１３は、前記ダンパ開
度調節手段１２の開度判定部１２ｃで判定した前記排ガ
ス用ダンパ３の開度（Ｚ）が許容範囲内か否かに関する
情報を受けて、誘引送風機４の回転数を変更調節するべ
きか否かを判定し、その変更方向を判別する判別部１３
ａと、前記誘引送風機４を駆動する誘導電動機の回転数
（Ｎ）を制御するインバータ制御機構として静止レオナ
ード方式の周波数制御機構１４を備えた回転数設定部１
３ｂとで構成してある。The rotation speed adjusting means 13 receives information on whether or not the opening degree (Z) of the exhaust gas damper 3 judged by the opening judging section 12c of the damper opening adjusting means 12 is within an allowable range. The determination unit 13 that determines whether or not the rotational speed of the induction blower 4 should be changed and adjusted, and determines the change direction.
a and a rotation speed setting unit 1 including a stationary Leonard type frequency control mechanism 14 as an inverter control mechanism for controlling the rotation speed (N) of the induction motor that drives the induction blower 4.
3b and.
【００１１】前記判別部１３ａで前記開度（Ｚ）が前記
許容範囲外であると判定した場合には、その許容範囲を
逸脱した方向に応じて、前記電源周波数（Ｆ）の変化方
向を決定し、前記判別部１３ａの前記回転数（Ｎ）増減
の方向を前記回転数設定部１３ｂの周波数制御機構１４
に指示する。前記周波数制御機構１４は、前記判別部１
３ａから指示される前記回転数（Ｎ）の増減方向に応じ
て、前記電源周波数（Ｆ）を例えば１０秒間当たり１Ｈ
ｚ変化させる。この電源周波数（Ｆ）の変化は、前記ダ
ンパ開度調節手段１２の開度検出部１２ｂで検出した前
記排ガス用ダンパ３の開度（Ｚ）が、基準開度（ＺS ）
に達するまで持続される。When the discriminating unit 13a determines that the opening (Z) is outside the allowable range, the changing direction of the power frequency (F) is determined according to the direction deviating from the allowable range. Then, the direction of increasing / decreasing the rotation speed (N) of the discriminating unit 13a is set to the frequency control mechanism 14 of the rotation speed setting unit 13b.
Instruct. The frequency control mechanism 14 includes the determination unit 1
According to the increasing / decreasing direction of the rotation speed (N) instructed from 3a, the power supply frequency (F) is set to, for example, 1H per 10 seconds.
Change z. This change in the power supply frequency (F) is based on the reference opening (Z S ) when the opening (Z) of the exhaust gas damper 3 detected by the opening detection unit 12b of the damper opening adjusting means 12 is detected.
Will be maintained until.
【００１２】本発明の炉内圧制御装置に於ける炉内圧制
御は、例えば図２に示したような手順で行われる。つま
り、炉内圧検出手段１１で炉内圧（Ｐ）を検出し〈ステ
ップ１−※１〉、開度設定部１２ａで目標炉内圧
（ＰS ）と比較する〈ステップ１−※２〉。前記開度設
定部１２ａでは、〈ステップ１−※２〉での比較結果に
基づき、炉内圧（Ｐ）が目標炉内圧（ＰS ）よりも低い
場合には、排ガス用ダンパ３の開度（Ｚ）を減少側に調
節し〈ステップ１−※３．１〉、前記炉内圧（Ｐ）が前
記目標炉内圧（ＰS ）よりも高い場合には、前記排ガス
用ダンパ３の開度（Ｚ）を増大側に調節する〈ステップ
１−※３．２〉。以上は、自動的に前記開度設定部１２
ａで前記炉内圧（Ｐ）の検出結果に基づき実行される。
さらに、開度検出部１２ｂで前記排ガス用ダンパ３の開
度（Ｚ）を検出し〈ステップ１−※４〉、回転数設定部
１３ｂでは、〈ステップ１−※４〉で検出した開度
（Ｚ）が基準開度（ＺS ）に達したか否かを判定する
〈ステップ１−※５〉。ここで、前記開度（Ｚ）が基準
開度（ＺS ）に達すると、前記回転数設定部１３ｂへの
後記回転数変更指示をキャンセルして〈ステップ１−※
６〉、〈ステップ１−※１〉に戻る。さらに、前記〈ス
テップ１−※５〉で前記開度検出部１２ｂの検出した開
度（Ｚ）を、開度判定部１２ｃで前記開度（Ｚ）を設定
された開度の許容範囲と対比して〈ステップ１−※
７〉、前記〈ステップ１−※７〉の結果、前記開度
（Ｚ）が前記許容範囲の下限開度（Ｚl ）未満であれ
ば、前記回転数設定部１３ｂに対して誘引送風機４の回
転数（Ｎ）を減少する指示を発し〈ステップ１−※８．
１〉、前記〈ステップ１−※８．１〉で判別部１３ａか
ら受けた指示の基づき、前記回転数設定部１３ｂでは所
定時間に１Ｈｚ電源周波数（Ｆ）を減少する〈ステップ
１−※９．１〉。一方、前記〈ステップ１−※７〉の結
果、前記開度（Ｚ）が前記許容範囲の上限開度（Ｚu ）
を超えていれば、前記誘引送風機４の回転数（Ｎ）を増
加する指示を発し〈ステップ１−※８．２〉、前記〈ス
テップ１−※８．２〉で判別部１３ａから受けた指示の
基づき、前記回転数設定部１３ｂでは所定時間に１Ｈｚ
電源周波数（Ｆ）を増加する〈ステップ１−※９．
２〉。炉内圧制御のために以上のサイクルを繰り返すの
である。The furnace pressure control in the furnace pressure control apparatus of the present invention is performed, for example, by the procedure shown in FIG. In other words, detecting the furnace inner pressure (P) in a furnace pressure detection means 11 <Step 1-※ 1>, is compared with the target furnace pressure (P S) at the degree of opening setting unit 12a <Step 1-※ 2>. In the degree of opening setting unit 12a, based on a comparison result in <Step 1-※ 2>, when the furnace pressure (P) is lower than the target furnace pressure (P S) is the exhaust gas damper 3 opening ( Z) is adjusted to the decreasing side <Step 1- * 3.1>, and when the furnace internal pressure (P) is higher than the target furnace internal pressure (P S ), the opening degree (Z) of the exhaust gas damper 3 (Z ) To the increasing side <Step 1- * 3.2>. The above is automatically the opening degree setting unit 12
In a, it is executed based on the detection result of the furnace pressure (P).
Further, the opening degree detection unit 12b detects the opening degree (Z) of the exhaust gas damper 3 <step 1- * 4>, and the rotation speed setting portion 13b detects the opening degree (step 1- * 4) ( It is determined whether Z) has reached the reference opening (Z S ) <step 1- * 5>. Here, when the opening degree (Z) reaches the reference opening degree (Z S ), the rotation speed changing instruction to the rotation speed setting unit 13b described later is canceled and <step 1- *
6>, return to <Step 1- * 1>. Furthermore, the opening degree (Z) detected by the opening degree detection unit 12b in <Step 1- * 5> is compared with the allowable range of the opening degree in which the opening degree determination unit 12c sets the opening degree (Z). Then <Step 1- *
7>, as a result of <Step 1- * 7>, if the opening degree (Z) is less than the lower limit opening degree (Z l ) of the allowable range, the induction blower 4 of the rotation speed setting unit 13b is set. An instruction is issued to reduce the rotation speed (N) <Step 1- * 8.
1>, based on the instruction received from the determination unit 13a in <Step 1- * 8.1>, the rotation speed setting unit 13b decreases the 1 Hz power supply frequency (F) in a predetermined time <Step 1- * 9. 1>. On the other hand, as a result of <Step 1- * 7>, the opening (Z) is the upper limit opening (Z u ) of the allowable range.
If it exceeds, the instruction to increase the rotation speed (N) of the induction blower 4 is issued <Step 1- * 8.2>, and the instruction received from the determination unit 13a in <Step 1- * 8.2>. On the basis of the
Increase power supply frequency (F) <Step 1- * 9.
2>. The above cycle is repeated to control the furnace pressure.
【００１３】例をあげれば、図３に示したように、下限
開度（Ｚl ）を３５％とし、上限開度（Ｚu ）を６５％
として、前記排ガス用ダンパ３の開度（Ｚ）の許容範囲
を３０％幅の３５〜６５％に設定し、前記基準開度（Ｚ
S ）を５０％に設定し、前記誘引送風機４の回転数調節
手段１３における回転数設定部１３ｂにインバータ制御
機構１４として静止レオナード方式の周波数制御機構を
用いて、出力周波数（Ｆ）をインバータ制御して、１０
〜６０Ｈｚの周波数範囲で駆動し、前記排ガス用ダンパ
の開度（Ｚ）が前記上限開度（Ｚu ）から逸脱して、６
５％を超えれば、前記周波数制御機構１４の出力周波数
を例えば１０秒間に１Ｈｚ増加するというような回転数
制御が行われる。そして、前記開度（Ｚ）が前記下限開
度（Ｚl）から逸脱して、３５％未満になると、前記周
波数制御機構１４の出力周波数（Ｆ）を例えば１０秒間
に１Ｈｚ減少する。そして、前記出力周波数（Ｆ）の変
化を、前記排ガス用ダンパ３の開度（Ｚ）が前記基準開
度（ＺS ）に達するまで持続する。その結果、前記誘引
送風機４の回転数（Ｎ）は、上記排ガス用ダンパ３の開
度（Ｚ）追従の遅れを許容する速度で変化するようにな
っており、しかも、前期開度（Ｚ）が前記基準開度（Ｚ
S ）に達するまで前記誘引送風機４の回転数（Ｎ）を変
更調節する。従って、たとえ前記排ガス用ダンパ３の開
度（Ｚ）追従の遅れが大きくなっても、その遅れに伴う
制御のオーバーシュトを回避できるようになっている。As an example, as shown in FIG. 3, the lower limit opening (Z l ) is 35% and the upper limit opening (Z u ) is 65%.
As the allowable range of the opening degree (Z) of the exhaust gas damper 3 is set to 35% to 35% of the 30% width, the reference opening degree (Z
S ) is set to 50%, and the output frequency (F) is inverter controlled by using a static Leonard type frequency control mechanism as the inverter control mechanism 14 in the rotation speed setting unit 13b in the rotation speed adjusting means 13 of the induction blower 4. Then 10
Driving in the frequency range of -60 Hz, the opening (Z) of the exhaust gas damper deviates from the upper limit opening (Z u ) and
If it exceeds 5%, rotation speed control is performed such that the output frequency of the frequency control mechanism 14 is increased by 1 Hz for 10 seconds, for example. Then, when the opening degree (Z) deviates from the lower limit opening degree (Z l ) and becomes less than 35%, the output frequency (F) of the frequency control mechanism 14 is reduced by, for example, 1 Hz for 10 seconds. Then, the change of the output frequency (F) is continued until the opening degree (Z) of the exhaust gas damper 3 reaches the reference opening degree (Z S ). As a result, the rotation speed (N) of the induction blower 4 changes at a speed that allows a delay in following the opening degree (Z) of the exhaust gas damper 3 and, in addition, the opening degree (Z) in the previous period. Is the reference opening (Z
The rotation speed (N) of the induction blower 4 is changed and adjusted until it reaches S ). Therefore, even if the delay in following the opening degree (Z) of the exhaust gas damper 3 becomes large, it is possible to avoid the overshoot of control due to the delay.
【００１４】次に、本発明の他の実施の形態について説
明する。
〈１〉上記実施の形態に於いては、本発明の炉内圧制御
装置を、廃棄物焼却炉１を備えた廃棄物焼却設備に適用
した例を示したが、適用設備は炉内の燃焼空間内圧を制
御するものであれば、どのような廃棄物処理設備にも適
用可能である。例えば、廃棄物熱分解炉、廃棄物溶融炉
等に好適に使用できる。また、炉の形式に拘泥するもの
ではなく、廃棄物焼却炉の場合には、ストーカ式、回転
胴式（例えばロータリキルン炉）、流動層式その他の燃
焼炉に適用可能である。
〈２〉上記実施の形態に於いては、排ガス用ダンパ３の
開度（Ｚ）の下限開度（Ｚl ）を３５％に、上限開度
（Ｚu ）を６５％に、基準開度（ＺS ）を５０％に、夫
々設定して、許容範囲を、３５〜６５％開度とした例を
示したが、前記下限開度（Ｚl ）及び前記上限開度（Ｚ
u ）は、ダンパ機構の特性に応じて設定されるもので、
制御特性が線形である領域を利用した例を示したもので
あって、ダンパ機構の特性によっては非線形領域までを
含めて許容範囲を設定することも可能である。また、前
記基準開度（ＺS ）も前記線形領域の中央値を用いたも
ので、基準開度（ＺS ）の両側の制御性に差を招かない
ように設定したものであって、誘引送風機４の制御特性
によっては、前記基準開度（ＺS ）を上下一方に偏らせ
て設定した方が好都合であればそのように設定するもの
である。また、制御幅を３０％としてあるが、これもダ
ンパ機構の特性に応じて、さらに、誘引送風機４及びそ
の駆動電動機の特性に応じて設定するもので、前記制御
幅が４０％であってもよく、また２０％であってもよ
い。
〈３〉上記実施の形態に於いては、ダンパ開度調節手段
１２を、開度検出部１２ｂと、開度判定部１２ｃと、ダ
ンパ開度設定部１２ａとで構成した例を示したが、この
構成は一例であって、ダンパ開度を炉内圧と誘引送風機
の誘引能力とに合わせて調節するものであれば良い。
〈４〉上記実施の形態に於いては、回転数調節手段１３
を、判別部１３ａと回転数設定部１３ｂとで構成した例
を示したが、この構成は一例であって、誘引送風機４の
駆動を制御して、排ガス用ダンパ３の開度（Ｚ）と齟齬
無く連動するように構成されてあれば構成を問うもので
はない。例えば、上記例では、誘引送風機４の駆動電動
機を誘導電動機として、回転数設定部１３ｂにインバー
タ制御機構１４として静止レオナード方式の周波数制御
機構を備えるようにした例を示したが、ワードレオナー
ド方式のものであってもよく、前記回転数設定部１３ｂ
は他の方式の駆動回転数制御機構であってもよい。さら
に、前記駆動電動機が直流電動機であってもよく、電源
電圧によって制御するものであってもよい。Next, another embodiment of the present invention will be described. <1> In the above embodiment, an example in which the furnace pressure control device of the present invention is applied to a waste incinerator equipped with the waste incinerator 1 is shown. The applicable equipment is a combustion space in the furnace. It can be applied to any waste treatment facility as long as it controls the internal pressure. For example, it can be preferably used in a waste thermal decomposition furnace, a waste melting furnace, and the like. Further, the present invention is not limited to the type of furnace, and in the case of a waste incinerator, it can be applied to a stoker type, a rotary cylinder type (for example, a rotary kiln furnace), a fluidized bed type and other combustion furnaces. <2> In the above embodiment, the lower limit opening (Z l ) of the opening (Z) of the exhaust gas damper 3 is set to 35%, the upper limit opening (Z u ) is set to 65%, and the reference opening is set. Although (Z S ) is set to 50% and the allowable range is set to 35 to 65% opening, the lower limit opening (Z l ) and the upper limit opening (Z 1 ) are set.
u ) is set according to the characteristics of the damper mechanism.
This is an example using a region where the control characteristic is linear, and depending on the characteristic of the damper mechanism, it is possible to set the allowable range including the non-linear region. Further, the reference opening (Z S ) also uses the median value of the linear region and is set so as not to cause a difference in controllability on both sides of the reference opening (Z S ). Depending on the control characteristics of the blower 4, if it is convenient to set the reference opening (Z S ) to one of the upper and lower sides, it is set as such. Further, although the control width is set to 30%, this is also set according to the characteristics of the damper mechanism and further according to the characteristics of the induction blower 4 and its drive motor, and even if the control width is 40%. Well, it may be 20%. <3> In the above embodiment, an example in which the damper opening adjusting means 12 is composed of the opening detecting unit 12b, the opening determining unit 12c, and the damper opening setting unit 12a has been described. This configuration is an example, and any configuration may be used as long as the damper opening is adjusted according to the furnace internal pressure and the induction capacity of the induction blower. <4> In the above embodiment, the rotation speed adjusting means 13
Is shown to be configured by the determination unit 13a and the rotation speed setting unit 13b. However, this configuration is an example, and the drive of the induction blower 4 is controlled to set the opening degree (Z) of the exhaust gas damper 3 and The configuration does not matter if it is configured to work together without any discrepancies. For example, in the above example, an example in which the drive motor of the induction blower 4 is an induction motor and the rotation speed setting unit 13b is provided with a static Leonard type frequency control mechanism as the inverter control mechanism 14 is shown. The rotation speed setting unit 13b may be a rotating speed setting unit 13b.
May be a drive rotation speed control mechanism of another system. Further, the drive motor may be a DC motor or may be controlled by a power supply voltage.
【００１５】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】本発明の炉内圧制御装置の一適用例を示す説明
図FIG. 1 is an explanatory view showing an application example of a furnace pressure control device of the present invention.
【図２】図１に示した炉内圧制御装置の制御手順の一例
を示す流れ図FIG. 2 is a flow chart showing an example of a control procedure of the reactor internal pressure control device shown in FIG.
【図３】図２に示した制御手順に対する制御応答線図の
一例を示す説明図FIG. 3 is an explanatory diagram showing an example of a control response diagram for the control procedure shown in FIG.
【図４】従来の炉内圧制御装置の一例を示す説明図FIG. 4 is an explanatory view showing an example of a conventional furnace pressure control device.
【図５】従来の制御手順の一例を示す流れ図FIG. 5 is a flowchart showing an example of a conventional control procedure.
【図６】図５に示した制御手順に対する制御応答線図の
一例を示す説明図6 is an explanatory diagram showing an example of a control response diagram for the control procedure shown in FIG.
【図７】図５に示した制御手順に対する制御応答線図の
他の例を示す説明図7 is an explanatory diagram showing another example of a control response diagram for the control procedure shown in FIG.
１ 廃棄物処理炉 ２ 排ガス路 ３ 排ガス用ダンパ ４ 誘引送風機 ５ 煙突 １１ 炉内圧検出手段 １２ ダンパ開度調節手段 １３ 回転数調節手段 １４ インバータ制御機構 1 Waste treatment furnace 2 exhaust gas passage 3 Exhaust gas damper 4 induction blower 5 chimney 11 Reactor pressure detection means 12 Damper opening adjustment means 13 Rotation speed adjustment means 14 Inverter control mechanism
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２３Ｌ 17/16 Ｆ２３Ｌ 17/16 ６０９Ｍ Ｇ０５Ｄ 16/20 Ｇ０５Ｄ 16/20 Ａ Ｈ０２Ｐ 7/63 ３０２ Ｈ０２Ｐ 7/63 ３０２Ｄ // Ｆ１６Ｋ 31/04 Ｆ１６Ｋ 31/04 Ｋ (56)参考文献 特開 平７−286723（ＪＰ，Ａ) 特開 平６−11126（ＪＰ，Ａ) 特開 平５−324095（ＪＰ，Ａ) 特開 昭60−232413（ＪＰ，Ａ) 特開 昭56−162320（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23G 5/50 ZAB F23L 17/16 607 F23L 17/16 609 F23N 5/00 ─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. 7 Identification Code FI F23L 17/16 F23L 17/16 609M G05D 16/20 G05D 16/20 A H02P 7/63 302 H02P 7/63 302D // F16K 31 / 04 F16K 31/04 K (56) Reference JP-A-7-286723 (JP, A) JP-A-6-11126 (JP, A) JP-A-5-324095 (JP, A) JP-A-60- 232413 (JP, A) JP 56-162320 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F23G 5/50 ZAB F23L 17/16 607 F23L 17/16 609 F23N 5 / 00
Claims (4)
（５）に案内する排ガス路（２）に排ガス用ダンパ
（３）と、誘引送風機（４）とを順に設け、前記廃棄物
処理炉（１）の炉内圧を検出する炉内圧検出手段（１
１）を設けるとともに、 前記炉内圧検出手段（１１）からの検出炉内圧が目標炉
内圧となるように前記排ガス用ダンパ（３）の開度を許
容範囲で調節するダンパ開度調節手段（１２）と、 前記誘引送風機（４）の回転数を制御する回転数調節手
段（１３）とを設けてある炉内圧制御装置であって、 前記回転数調節手段（１３）を、 前記排ガス用ダンパ（３）の開度が許容範囲を逸脱した
場合に、 前記排ガス用ダンパ（３）の開度が前記許容範囲内に設
定された基準開度に向けて調節され、前記排ガス用ダン
パ（３）の開度が前記基準開度に達すると、前記誘引送
風機（４）の回転数の変更を停止するように構成してあ
る炉内圧制御装置。1. A waste gas damper (3) and an induction blower (4) are provided in this order in an exhaust gas passage (2) for guiding exhaust gas from a waste treatment furnace (1) to a chimney (5), and the waste is disposed in order. Furnace pressure detection means (1) for detecting the furnace pressure of the processing furnace (1)
1) is provided and a damper opening degree adjusting means (12) for adjusting the opening degree of the exhaust gas damper (3) within an allowable range so that the detected furnace pressure from the furnace pressure detection means (11) becomes a target furnace pressure. ) And a rotation speed adjusting means (13) for controlling the rotation speed of the induction blower (4), wherein the rotation speed adjusting means (13) is used for the exhaust gas damper ( when the opening degree of 3) deviates from the allowable range, the opening degree of the exhaust gas damper (3) is adjusted toward a reference opening set within the allowable range, Dan for the flue gas
A furnace internal pressure control device configured to stop changing the rotational speed of the induced draft fan (4) when the opening of the valve (3) reaches the reference opening .
（３）の線形動作領域に対応する開度の範囲とする請求
項１記載の炉内圧制御装置。2. The in-reactor pressure control device according to claim 1, wherein the allowable range is a range of opening degrees corresponding to a linear operation region of the exhaust gas damper (3).
はその近傍に設定された開度とする請求項１又は２に記
載の炉内圧制御装置。3. The reactor internal pressure control device according to claim 1, wherein the reference opening is an opening set at or near the center of the allowable range.
タ制御機構（１４）を設けて、 前記インバータ制御機構（１４）からの出力周波数を、
前記排ガス用ダンパ（３）の、前記ダンパ開度調節手段
（１２）からの制御信号への追従特性から定められる変
化率の範囲内で変化させるように構成してある請求項１
〜３の何れか１項に記載の炉内圧制御装置。4. An inverter control mechanism (14) is provided in the rotation speed adjusting means (13), and an output frequency from the inverter control mechanism (14) is
The exhaust gas damper (3) is configured to be changed within a range of a change rate determined from a follow-up characteristic to a control signal from the damper opening adjusting means (12).
The reactor internal pressure control device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05876997A JP3523442B2 (en) | 1997-03-13 | 1997-03-13 | Furnace pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05876997A JP3523442B2 (en) | 1997-03-13 | 1997-03-13 | Furnace pressure control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10253030A JPH10253030A (en) | 1998-09-25 |
| JP3523442B2 true JP3523442B2 (en) | 2004-04-26 |
Family
ID=13093766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05876997A Expired - Fee Related JP3523442B2 (en) | 1997-03-13 | 1997-03-13 | Furnace pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3523442B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015210035A (en) * | 2014-04-28 | 2015-11-24 | 荏原環境プラント株式会社 | Device for adjusting pressure in furnace and method for adjusting pressure in furnace |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007127355A (en) * | 2005-11-04 | 2007-05-24 | Takuma Co Ltd | Rubbish incinerating/melting method and device therefor |
| KR100758455B1 (en) | 2006-10-25 | 2007-09-14 | 주식회사 포스코 | Inner pressure control method in reheating furnace of hot rolling mill |
| JP2010091236A (en) * | 2008-10-10 | 2010-04-22 | Osaka Gas Co Ltd | Furnace pressure control apparatus |
| JP6664238B2 (en) * | 2016-03-04 | 2020-03-13 | 日鉄エンジニアリング株式会社 | Furnace pressure control method, furnace pressure adjustment device, and waste treatment device |
| JP7058559B2 (en) * | 2018-06-01 | 2022-04-22 | 株式会社タクマ | Waste incinerator and incinerator pressure control method |
| JP7308063B2 (en) * | 2019-03-29 | 2023-07-13 | 三菱重工業株式会社 | Computing device, system, computing method and program |
-
1997
- 1997-03-13 JP JP05876997A patent/JP3523442B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015210035A (en) * | 2014-04-28 | 2015-11-24 | 荏原環境プラント株式会社 | Device for adjusting pressure in furnace and method for adjusting pressure in furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10253030A (en) | 1998-09-25 |
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