JP3484687B2 - Control method of moving electrode type electrostatic precipitator - Google Patents
Control method of moving electrode type electrostatic precipitatorInfo
- Publication number
- JP3484687B2 JP3484687B2 JP31789398A JP31789398A JP3484687B2 JP 3484687 B2 JP3484687 B2 JP 3484687B2 JP 31789398 A JP31789398 A JP 31789398A JP 31789398 A JP31789398 A JP 31789398A JP 3484687 B2 JP3484687 B2 JP 3484687B2
- Authority
- JP
- Japan
- Prior art keywords
- dust collecting
- collecting electrode
- electrode plate
- dust
- electrostatic precipitator
- 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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は移動電極形電気集塵
装置の制御方法に係り、特に集塵極板を移動速度を適正
値に制御する移動形電気集塵装置の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a moving electrode type electrostatic precipitator, and more particularly to a method for controlling a moving electric precipitator for controlling a moving speed of a dust collecting electrode plate to an appropriate value.
【０００２】[0002]
【従来の技術】電気集塵装置は、処理ガス中に浮遊して
いる固体または液体の微粒子をその処理ガスから分離す
る装置であり、通常、平板状の集塵極と、これに対向す
る細線の放電極とを備えている。電気集塵装置は、これ
ら両電極間に直流高電圧を印加してコロナ放電を伴った
電界を形成するとともに両電極間に処理ガスを送気する
ことにより、処理ガス中の微粒子（以下ダストと称す）
を放電極側で発生したイオンによって荷電し、電界の偏
向作用によって集塵極に引き付けて集塵極表面に捕集す
る。2. Description of the Related Art An electrostatic precipitator is a device for separating solid or liquid fine particles suspended in a processing gas from the processing gas. Usually, a flat plate-shaped dust collecting electrode and a thin wire facing it are used. And a discharge electrode. The electrostatic precipitator applies a direct current high voltage between these electrodes to form an electric field accompanied by corona discharge, and at the same time sends the processing gas between both electrodes, so that the particles in the processing gas (hereinafter referred to as dust and Name)
Are charged by the ions generated on the discharge electrode side, and are attracted to the dust collecting electrode by the deflection action of the electric field to be collected on the dust collecting electrode surface.
【０００３】ところで、このような電気集塵装置では、
運転時間の経過に伴ってダストが集塵極板に層状に堆積
して荷電条件が変化すると、集塵性能が低下することが
知られている。特に、ダストの電気抵抗率が高い高抵抗
ダストの場合には、逆電離などの異常現象が発生して集
塵性能が著しく低下してしまう。そこで、一般には集塵
極を頻繁に槌打して、ダスト層を除去している。しか
し、この方法では、槌打して落下したダストが再び処理
ガスに混入し、集塵性能を低下させる原因になる。ま
た、ダストの付着力が強い場合、前述した方法では、槌
打してもダストが落下せず、ダストを除去できないとい
う欠点がある。By the way, in such an electrostatic precipitator,
It is known that if the dust accumulates in layers on the dust collecting electrode plate as the operating time elapses and the charging conditions change, the dust collecting performance deteriorates. In particular, in the case of high-resistance dust having a high electric resistivity, the abnormal performance phenomenon such as reverse ionization occurs and the dust collection performance is significantly reduced. Therefore, generally, the dust collecting electrode is frequently hammered to remove the dust layer. However, in this method, the dust that has been hammered and dropped mixes with the processing gas again, which causes the dust collection performance to deteriorate. In addition, when the dust has a strong adhesive force, the above-mentioned method has a drawback that the dust cannot be removed even if it is hammered, and the dust cannot be removed.
【０００４】そこで、付着力が強く電気抵抗率の高い高
抵抗ダストを完全に除去することができるものとして、
移動電極形電気集塵装置が知られている。この電気集塵
装置は、複数の集塵極板を周回移動させて、該集塵極に
堆積したダストをブラシで順次払い落して除去する装置
である。移動電極形電気集塵装置の主な構成は、図５に
示すように、集塵室１内の上部に設けられた一対の駆動
用スプロケット２、２にそれぞれ無端チェーン３、３を
係合し、該無端チェーン３、３で集塵室１下部空中のロ
ーラ４を吊設するとともに、前記一対の無端チェーン
３、３に短冊型の複数の集塵極板５、５、…を架設して
構成される。これにより、前記駆動用スプロケット２、
２を回転すると、前記無端チェーン３、３を介して集塵
極板５が周回移動する。Therefore, as a material capable of completely removing high-resistance dust having a strong adhesive force and a high electric resistivity,
A moving electrode type electrostatic precipitator is known. This electrostatic precipitator is an apparatus in which a plurality of dust-collecting electrode plates are moved around, and the dust accumulated on the dust-collecting electrodes is sequentially brushed off and removed. As shown in FIG. 5, the main construction of the moving electrode type electrostatic precipitator is that the endless chains 3 and 3 are engaged with a pair of driving sprockets 2 and 2 provided in the upper part of the dust collecting chamber 1, respectively. , A roller 4 in the air below the dust collecting chamber 1 is suspended by the endless chains 3 and 3, and a plurality of strip-shaped dust collecting electrode plates 5, 5 are installed on the pair of endless chains 3 and 3. Composed. Thereby, the drive sprocket 2,
When 2 is rotated, the dust collecting electrode plate 5 is revolved through the endless chains 3 and 3.
【０００５】また、前記集塵室１には、図示しない回転
ブラシが集塵極板５に当接するように取り付けられてい
て、放電極６と集塵極５、５、…との間で放電して集塵
極板５に堆積したダストを順次払い落としている。した
がって、集塵極板５に堆積したダストは、回転ブラシの
位置を通過する度に払い落とされるので、集塵極板５の
移動速度が大きいほど、ダストの堆積を抑制することが
できる。このことから、従来は、集塵極板５を比較的速
い速度で周回移動させて、集塵極板５へのダストの堆積
を抑制していた。Further, a rotating brush (not shown) is attached to the dust collecting chamber 1 so as to abut the dust collecting electrode plate 5, and discharge is performed between the discharge electrode 6 and the dust collecting electrodes 5, 5, .... Then, the dust accumulated on the dust collecting electrode plate 5 is sequentially removed. Therefore, the dust accumulated on the dust collecting electrode plate 5 is wiped off every time the dust collecting electrode plate 5 passes through the position of the rotating brush. Therefore, the higher the moving speed of the dust collecting electrode plate 5, the more the dust accumulation can be suppressed. For this reason, conventionally, the dust collecting electrode plate 5 is orbitally moved at a relatively high speed to suppress the accumulation of dust on the dust collecting electrode plate 5.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、集塵極
板の移動速度が大きいと、無端チェーンや回転ブラシ等
の構成部品が著しく磨耗し、その寿命が短くなるという
欠点があった。そこで、集塵極板の移動速度をできるだ
け抑えることが望まれていたが、移動速度が小さ過ぎる
と集塵性能が低下してしまうため、集塵極板の移動速度
を人間の判断で制御するのは困難であった。However, when the moving speed of the dust collecting electrode plate is high, there is a drawback that components such as an endless chain and a rotating brush are significantly worn and the life thereof is shortened. Therefore, it has been desired to suppress the moving speed of the dust collecting electrode plate as much as possible. However, if the moving speed is too low, the dust collecting performance deteriorates. Therefore, the moving speed of the dust collecting electrode plate is controlled by human judgment. It was difficult.
【０００７】本発明はこのような事情に鑑みてなされた
もので、集塵極板の移動速度を制御することのできる移
動電極形電気集塵装置の制御方法を提供することを目的
とする。The present invention has been made in view of the above circumstances, and an object thereof is to provide a control method for a moving electrode type electrostatic precipitator capable of controlling the moving speed of a dust collecting electrode plate.
【０００８】[0008]
【課題を解決する為の手段】本発明は前記目的を達成す
るために、集塵領域と非集塵領域とを周回移動する複数
の集塵極板と該集塵極板に対向して配置された放電極と
の間に荷電電圧を印加してダストを前記集塵極板に捕集
するとともに、前記集塵極板に当接して設けたブラシに
よって前記集塵極板に捕集したダストを払い落とす移動
電極形電気集塵装置の制御方法において、前記周回移動
する集塵極板の移動速度を検出し、該検出値から集塵極
板の周期を演算し、該演算した集塵極板の周期ごとに、
前記放電極と前記集塵極板における荷電状況を確認し、
該確認した荷電状況に基づいて、前記周回移動する集塵
極板の移動速度を調整することを特徴とする。In order to achieve the above-mentioned object, the present invention arranges a plurality of dust collecting electrode plates which move in a circulating manner in a dust collecting region and a non-dust collecting region, and to face the dust collecting electrode plates. The dust is collected on the dust collecting electrode plate by applying a charging voltage between the dust collecting electrode plate and the dust collecting electrode, and the dust is collected on the dust collecting electrode plate by a brush provided in contact with the dust collecting electrode plate. In the control method of the moving electrode type electrostatic precipitator for removing the dust collector, the moving speed of the orbiting dust collecting electrode plate is detected, the cycle of the dust collecting electrode plate is calculated from the detected value, and the calculated dust collecting electrode is calculated. For each plate cycle,
Check the charging status of the discharge electrode and the dust collecting plate,
The moving speed of the orbiting dust collecting electrode plate is adjusted based on the confirmed charging state.
【０００９】本発明によれば、周回移動する集塵極板の
周期を演算し、該演算した周期ごとに荷電状況を判断
し、該荷電状況に応じて集塵極板の移動速度を調整す
る。このように、荷電状況に応じて集塵極板の移動速度
を調整するので、電気集塵装置の構成部品が著しく磨耗
したり、集塵性能が大きく低下したりするのを防止する
ことができる。According to the present invention, the period of the orbiting dust collecting electrode plate is calculated, the charging condition is judged for each calculated period, and the moving speed of the dust collecting electrode plate is adjusted according to the charging condition. . In this way, the moving speed of the dust collecting electrode plate is adjusted according to the charging state, so that it is possible to prevent the components of the electrostatic precipitator from being significantly worn or the dust collecting performance being significantly reduced. .
【００１０】[0010]
【発明の実施の形態】以下添付図面に従って、本発明に
係る移動電極形電気集塵装置の制御方法の好ましい実施
の形態について詳説する。図１は、移動電極形電気集塵
装置１０の構成を示す構成図である。同図に示すよう
に、移動電極形電気集塵装置１０は主として、集塵室１
８、放電極４２及び集塵極板３４、３４、…から構成さ
れる。集塵室１８には、ガスの取入口１４と排気口１６
とが設けられ、矢印１２方向に処理ガスが送気される。
また、集塵室１８内の上部には、駆動軸２０が回転自在
に支持され、その一端がモータ２４に連結されるととも
に、一対のスプロケット２２、２２が所定の間隔をもっ
て嵌装されている。一対のスプロケット２２、２２に
は、それぞれ無端チェーン２８、２８が係合され、この
無端チェーン２８、２８にローラシャフト３０に嵌装さ
れた一対のローラ３２、３２が吊設されている。BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a control method for a moving electrode type electrostatic precipitator according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing a configuration of a moving electrode type electrostatic precipitator 10. As shown in the figure, the moving electrode type electrostatic precipitator 10 mainly includes a dust collecting chamber 1
8, the discharge electrode 42 and the dust collecting electrode plates 34, 34 ,. The dust collection chamber 18 includes a gas intake 14 and an exhaust port 16
Are provided, and the processing gas is sent in the direction of arrow 12.
A drive shaft 20 is rotatably supported in the upper part of the dust collection chamber 18, one end of which is connected to a motor 24, and a pair of sprockets 22 and 22 are fitted at a predetermined interval. Endless chains 28, 28 are engaged with the pair of sprockets 22, 22, respectively, and a pair of rollers 32, 32 fitted to a roller shaft 30 are suspended from the endless chains 28, 28.
【００１１】また、前記一対の無端チェーン２８、２８
には、短冊型の集塵極板３４、３４…が架設されてい
る。これにより、前記モータ２４を駆動すると、駆動軸
２０が回転して無端チェーン２８、２８が周回し、各集
塵極板３４が周回移動する。また、集塵室１８内の下部
には、円筒形の回転ブラシ３６が前記集塵極板３４に当
接して設けられる。回転ブラシ３６が嵌装された駆動軸
３７は、集塵室１８に回転自在に支持されるとともに、
一端が駆動モータ３８に連結されている。これにより、
駆動モータ３８を駆動すると、回転ブラシ３６が回転
し、集塵極板３４に堆積したダストを回転ブラシ３６で
払い落とすことができる。Further, the pair of endless chains 28, 28
Strip-shaped dust collecting electrode plates 34, 34 ... As a result, when the motor 24 is driven, the drive shaft 20 rotates, the endless chains 28, 28 orbit, and the dust collecting electrode plates 34 orbit. A cylindrical rotating brush 36 is provided in the lower part of the dust collecting chamber 18 in contact with the dust collecting electrode plate 34. The drive shaft 37 in which the rotating brush 36 is fitted is rotatably supported in the dust collection chamber 18, and
One end is connected to the drive motor 38. This allows
When the drive motor 38 is driven, the rotating brush 36 rotates, and the dust accumulated on the dust collecting electrode plate 34 can be removed by the rotating brush 36.
【００１２】また、前記集塵極板３４が周回移動する軌
跡内には、前記放電極４２が前記集塵極板３４と所定の
間隔で配置されている。放電極４２及び集塵極板３４
は、後述する整流器付変圧器５０に接続され、両電極間
に直流高電圧を印加するとコロナ放電を発生するように
構成される。なお、前記回転ブラシ３６は、放電極４２
と集塵極板３４との間で発生するコロナ放電に影響しな
いように非集塵領域に配置されている。Further, the discharge electrode 42 is arranged at a predetermined distance from the dust collecting electrode plate 34 within the path along which the dust collecting electrode plate 34 orbits. Discharge electrode 42 and dust collecting electrode plate 34
Is connected to a transformer 50 with a rectifier, which will be described later, and is configured to generate a corona discharge when a high DC voltage is applied between both electrodes. It should be noted that the rotating brush 36 has a discharge electrode 42.
It is arranged in the non-dust collecting area so as not to affect the corona discharge generated between the dust collecting electrode plate 34 and the dust collecting electrode plate 34.
【００１３】図２は、移動電極形電気集塵装置１０とそ
の電源回路との回路構成図である。同図に示すように、
移動電極形電気集塵装置１０の電源回路は主として、イ
ンバータ４６、荷電制御装置４８及び整流器付変圧器５
０で構成される。インバータ４６は、制御によって任意
に周波数を調節できるように構成され、モータ２４や駆
動モータ３８の回転速度、即ち、集塵極板３４の移動速
度や回転ブラシ３６の回転速度を調節することができ
る。FIG. 2 is a circuit diagram of the moving electrode type electrostatic precipitator 10 and its power supply circuit. As shown in the figure,
The power supply circuit of the moving electrode type electrostatic precipitator 10 mainly includes an inverter 46, a charge control device 48, and a transformer 5 with a rectifier.
It consists of 0. The inverter 46 is configured to be able to arbitrarily adjust the frequency by control, and can adjust the rotation speed of the motor 24 and the drive motor 38, that is, the moving speed of the dust collecting electrode plate 34 and the rotation speed of the rotating brush 36. .
【００１４】整流器付変圧器５０は、変圧器５４と整流
器５６で構成され、また、荷電制御装置４８は、電力制
御素子５８、電力制御回路６０及びマイクロコンピュー
タ６２で構成されている。前記電子制御素子５８は、２
つのサイリスタ６４、６４を逆並列接続して構成され、
交流電源６６に接続されている。これにより、交流電源
６６から出力された交流電圧は、電力制御素子５８によ
って位相制御され、変圧器５４によって昇圧され、さら
に整流器５６によって直流に整流されて、荷電電圧とし
て前記放電極４２に印加される。この荷電電圧によって
放電極４２と集塵極板３４との間にはコロナ放電が発生
し、両電極間の処理ガス中のダストが帯電して集塵極板
３４に捕集される。The transformer with rectifier 50 comprises a transformer 54 and a rectifier 56, and the charge controller 48 comprises a power control element 58, a power control circuit 60 and a microcomputer 62. The electronic control element 58 has two
Composed of two thyristors 64, 64 connected in anti-parallel,
It is connected to an AC power supply 66. As a result, the AC voltage output from the AC power supply 66 is phase-controlled by the power control element 58, boosted by the transformer 54, further rectified by the rectifier 56 into DC, and applied to the discharge electrode 42 as a charging voltage. It Due to this charging voltage, corona discharge occurs between the discharge electrode 42 and the dust collecting electrode plate 34, and the dust in the processing gas between both electrodes is charged and collected by the dust collecting electrode plate 34.
【００１５】また、前記整流器付変圧器５０には、荷電
電圧検出装置７０と放電電流検出装置７２が設けられ
る。荷電電圧検出装置７０は、抵抗分圧器を使用して荷
電電圧を検出し、放電電流検出装置７２は、分流抵抗器
を使用して放電電流を検出する。検出された荷電電圧と
放電電流は、信号ケーブルを介して随時マイクロコンピ
ュータ６２に入力される。Further, the transformer with rectifier 50 is provided with a charging voltage detecting device 70 and a discharge current detecting device 72. The charging voltage detection device 70 detects a charging voltage using a resistance voltage divider, and the discharge current detection device 72 detects a discharge current using a shunt resistor. The detected charging voltage and discharge current are input to the microcomputer 62 via the signal cable at any time.
【００１６】マイクロコンピュータ６２は、電力制御回
路６０に接続されており、電力制御回路６０を介してサ
イリスタ６４、６４の点弧角を制御し、放電極４２に印
加する放電電流値を可変することができる。また、マイ
クロコンピュータ６２は、放電電流値を可変した際に荷
電電圧検出装置７０で検出した荷電電圧と放電電流検出
装置７２で検出した放電電流との関係、即ち荷電特性を
記録し、記録した荷電特性に基づいて荷電状況を判断す
る。そして、マイクロコンピュータ６２は、荷電状況を
判断すると、インバータ４６に運転周波数を変換する信
号、即ち集塵極板３４の移動速度を調節する信号を出力
する。なお、前記荷電状況の判断方法については後に詳
説する。The microcomputer 62 is connected to the power control circuit 60, controls the firing angle of the thyristors 64, 64 via the power control circuit 60, and changes the discharge current value applied to the discharge electrode 42. You can Further, the microcomputer 62 records the relationship between the charging voltage detected by the charging voltage detecting device 70 and the discharging current detected by the discharging current detecting device 72 when changing the discharging current value, that is, the charging characteristic, and records the recorded charging. The charging status is determined based on the characteristics. When the microcomputer 62 determines the charging status, it outputs a signal for converting the operating frequency, that is, a signal for adjusting the moving speed of the dust collecting electrode plate 34 to the inverter 46. The method of determining the charging status will be described in detail later.
【００１７】また、マイクロコンピュータ６２は、前記
インバータ４６から運転周波数の信号が出力されると、
予め入力しておいた周波数と集塵極板３４の速度の特性
から集塵極板３４の速度を演算する。そして、集塵極板
３４の速度を演算した後、無端チェーン２８の長さから
集塵極板３４の周期を演算する。次に、マイクロコンピ
ュータ６２での荷電状況の判断方法について説明する。
図３は、判断方法の一例を説明する説明図である。Further, the microcomputer 62, when the signal of the operating frequency is output from the inverter 46,
The speed of the dust collecting electrode plate 34 is calculated from the characteristics of the frequency and the speed of the dust collecting electrode plate 34 which are input in advance. Then, after calculating the speed of the dust collecting electrode plate 34, the period of the dust collecting electrode plate 34 is calculated from the length of the endless chain 28. Next, a method of determining the charging status by the microcomputer 62 will be described.
FIG. 3 is an explanatory diagram illustrating an example of the determination method.
【００１８】マイクロコンピュータ６２は、同図に示す
ように、放電電流を可変した際に放電電流と荷電電圧と
の関係、即ち、荷電特性を記録する。そして、判断基準
として比電流（単位集塵面積当たりの放電電流）を監視
し、幾つかのパターンに分けて判断する。例えば比電流
を０．３ｍＡ／ｍ2 とし、以下に示す特性（Ａ）、特性
（Ｂ）、特性（Ｃ）に分類して判断する。As shown in the figure, the microcomputer 62 records the relationship between the discharge current and the charging voltage, that is, the charging characteristic when the discharge current is varied. Then, the specific current (the discharge current per unit dust collection area) is monitored as a judgment criterion, and judgment is made by dividing into several patterns. For example, the specific current is set to 0.3 mA / m 2, and the judgment is made by classifying into the following characteristics (A), characteristics (B) and characteristics (C).
【００１９】特性（Ａ）は、比電流まで放電電流ととも
に荷電電圧が増加し、且つ、放電電流値０．４ｍＡ／ｍ
2 までの荷電電圧の増加が３％以下の場合である。この
場合、荷電状況は正常領域にあるので、マイクロコンピ
ュータ６２は、インバータ４６の運転周波数、即ち集塵
極板３４の移動速度を現状のまま維持する。特性（Ｂ）
は、放電電流を増加させると比電流までに荷電電圧が却
って減少し、且つ、放電電流値０．４ｍＡ／ｍ2 まで荷
電電圧が減少した場合である。特性（Ｂ）は、集塵極板
３４に堆積したダストが厚くなり、逆電離を発生する恐
れのある状況である。したがって、この場合には、イン
バータ４６の運転周波数を例えば５％上昇させて、集塵
極板３４の移動速度を上昇させ、集塵極板３４に堆積し
ているダストをより少なくする。The characteristic (A) is that the charging voltage increases with the discharge current up to the specific current, and the discharge current value is 0.4 mA / m.
This is the case when the increase in the charging voltage up to 2 is 3% or less. In this case, since the charging condition is in the normal region, the microcomputer 62 maintains the operating frequency of the inverter 46, that is, the moving speed of the dust collecting electrode plate 34 as it is. Characteristic (B)
When the discharge current is increased, the charging voltage rather decreases to the specific current, and the charging voltage decreases to the discharge current value of 0.4 mA / m 2 . The characteristic (B) is a situation in which the dust accumulated on the dust collecting electrode plate 34 becomes thick and there is a possibility that reverse ionization occurs. Therefore, in this case, the operating frequency of the inverter 46 is increased by, for example, 5% to increase the moving speed of the dust collecting electrode plate 34 and reduce the amount of dust accumulated on the dust collecting electrode plate 34.
【００２０】特性（Ｃ）は、比電流まで放電電流ととも
に荷電電圧が増加し、且つ、放電電流値０．４ｍＡ／ｍ
2 までの荷電電圧の増加が３％以上の場合である。この
場合、特性（Ａ）と同様に荷電状況は正常領域にある
が、集塵極板３４の移動速度が大き過ぎて構成部品が著
しく磨耗する恐れがある状況である。したがって、イン
バータ４６の運転周波数を集塵効率の低下しない範囲で
例えば５％減少させ、集塵極板３４の速度を低下させ
る。The characteristic (C) is that the charging voltage increases with the discharge current up to the specific current, and the discharge current value is 0.4 mA / m.
This is the case when the increase in the charging voltage up to 2 is 3% or more. In this case, as in the case of the characteristic (A), the charging condition is in the normal region, but the moving speed of the dust collecting electrode plate 34 is too high, and the components may be significantly worn. Therefore, the operating frequency of the inverter 46 is reduced by, for example, 5% within the range where the dust collection efficiency is not reduced, and the speed of the dust collection electrode plate 34 is reduced.
【００２１】このように、マイクロコンピュータ６２
は、荷電状況を正常な状態に保ちながら集塵極板３４の
移動速度をできるだけ抑えるように、インバータ４６の
運転周波数を調節する。なお、上述した判別方法は、放
電電流を増加させた際に、正常領域では荷電電圧が増加
し、異常領域では荷電電圧が却って減少するという、荷
電特性を利用したものであるが、これに限定するもので
はない。例えば、火花発生頻度を検出し、該検出値によ
って荷電状況を判断して集塵極板３４の移動速度を調整
してもよい。また、前記荷電特性と火花検出頻度の双方
を利用して荷電状況を判断してもよい。Thus, the microcomputer 62
Adjusts the operating frequency of the inverter 46 so as to suppress the moving speed of the dust collecting electrode plate 34 as much as possible while keeping the charging state normal. It should be noted that the above-described determination method uses the charging characteristic that the charging voltage increases in the normal region and decreases in the abnormal region when the discharge current is increased, but is not limited to this. Not something to do. For example, the spark generation frequency may be detected, the charging status may be determined based on the detected value, and the moving speed of the dust collecting electrode plate 34 may be adjusted. Further, the charging status may be determined by using both the charging characteristic and the spark detection frequency.
【００２２】次に、本発明に係る移動電極形電気集塵装
置の制御方法の実施の形態について説明する。上記の如
く構成した移動電極形電気集塵装置１０では、モータ２
４を駆動して集塵極板３４を周回移動するとともに、放
電極４２に放電電流を与えて両電極間にコロナ放電を発
生させ、さらに、両電極間に処理ガスを送気して処理ガ
ス中のダストを集塵極板３４に捕集する。集塵極板３４
に捕集されたダストは、集塵極板３４とともに集塵室１
８下部まで周回移動し、駆動モータ３８によって回転し
た回転ブラシ３６によって払い落とされる。Next, an embodiment of the control method of the moving electrode type electrostatic precipitator according to the present invention will be described. In the moving electrode type electrostatic precipitator 10 configured as described above, the motor 2
4 is driven to move around the dust collecting electrode plate 34, and a discharge current is applied to the discharge electrode 42 to generate corona discharge between both electrodes. The dust inside is collected by the dust collecting electrode plate 34. Dust collecting electrode plate 34
The dust collected in the dust collecting chamber 1 together with the dust collecting electrode plate 34.
It is circulated to the lower part of 8 and is wiped off by the rotating brush 36 rotated by the drive motor 38.
【００２３】図４は、移動電極形電気集塵装置の制御方
法を示すフローチャートである。同図に示すように、マ
イクロコンピュータ６２は、電気集塵機の運転開始とと
もに、インバータ４６から運転周波数の信号を受信する
（ステップ６）。そして、マイクロコンピュータ６２
は、このインバータ４６の運転周波数から集塵極板３４
の移動速度を演算し、該演算値から集塵極板３４の周期
を演算する（ステップ１）。FIG. 4 is a flow chart showing a control method of the moving electrode type electrostatic precipitator. As shown in the figure, the microcomputer 62 receives the operation frequency signal from the inverter 46 when the operation of the electrostatic precipitator is started (step 6). And the microcomputer 62
From the operating frequency of the inverter 46, the dust collecting electrode plate 34
Is calculated, and the cycle of the dust collecting electrode plate 34 is calculated from the calculated value (step 1).
【００２４】そして、演算された周期後（ステップ
２）、マイクロコンピュータ６２は、電力制御回路６０
を制御して一定時間単位で放電電流を可変し、そのとき
の放電電流と荷電電圧の測定値を記録する（ステップ
３）。マイクロコンピュータ６２は、記憶された荷電特
性から荷電状況を判断し（ステップ４）、判断した荷電
状況に応じてインバータ４６の運転周波数を維持または
変換する信号をインバータ４６に出力する（ステップ
５）。例えば、記憶された荷電特性が特性（Ａ）の場合
はインバータ４６の運転周波数を維持し、特性（Ｂ）の
場合は運転周波数を上昇させ、特性（Ｃ）の場合は運転
周波数を低下させる。これにより、インバータ４６は、
運転周波数が変換し（ステップ７）、集塵極板３４は、
適切な速度で周回移動する。Then, after the calculated period (step 2), the microcomputer 62 causes the power control circuit 60 to
Is controlled to change the discharge current in a constant time unit, and the measured values of the discharge current and the charging voltage at that time are recorded (step 3). The microcomputer 62 determines the charging status from the stored charging characteristics (step 4) and outputs a signal for maintaining or converting the operating frequency of the inverter 46 to the inverter 46 according to the determined charging status (step 5). For example, when the stored charging characteristic is the characteristic (A), the operating frequency of the inverter 46 is maintained, in the case of the characteristic (B), the operating frequency is increased, and in the case of the characteristic (C), the operating frequency is decreased. As a result, the inverter 46 is
The operating frequency is converted (step 7), and the dust collecting electrode plate 34 is
Move around at an appropriate speed.
【００２５】前記マイクロコンピュータ６２は、インバ
ータ４６に周波数変換の信号を出力すると同時に、イン
バータ４６の運転周波数の信号を受信する（ステップ
６）。そして、マイクロコンピュータ６２は、再び集塵
極板３４の周期を演算し（ステップ１）、演算した周期
後（ステップ２）に荷電状況を確認し（ステップ３）、
該確認した荷電状況に基づいて集塵極板３４の移動速度
を調整する（ステップ４、ステップ５）。マイクロコン
ピュータ６２は、この一連の操作を繰り返して、集塵極
板３４のの周期ごとに集塵極板３４の移動速度を調整す
る。The microcomputer 62 outputs a frequency conversion signal to the inverter 46 and, at the same time, receives an operating frequency signal of the inverter 46 (step 6). Then, the microcomputer 62 again calculates the cycle of the dust collecting electrode plate 34 (step 1), and after the calculated cycle (step 2), confirms the charging status (step 3),
The moving speed of the dust collecting electrode plate 34 is adjusted based on the confirmed charging state (steps 4 and 5). The microcomputer 62 repeats this series of operations to adjust the moving speed of the dust collection electrode plate 34 for each cycle of the dust collection electrode plate 34.
【００２６】このように、本実施の形態では、集塵極板
３４の移動周期ごとに荷電状況を確認し、該荷電状況に
応じて集塵極板３４の移動速度を適正な値に調整するの
で、構成部品の著しい磨耗や集塵性能の低下を防止する
ことができる。また、本実施の形態では、集塵極板３４
の周期を演算し、該周期ごとに荷電状況を確認するの
で、常に同じ集塵極板３４（即ち同じ条件）で荷電状況
を確認することになり、荷電状況の変化を正確に検知す
ることができる。As described above, in the present embodiment, the charging condition is confirmed every movement cycle of the dust collecting electrode plate 34, and the moving speed of the dust collecting electrode plate 34 is adjusted to an appropriate value according to the charging condition. Therefore, it is possible to prevent the components from being significantly worn and the dust collecting performance from being deteriorated. Further, in the present embodiment, the dust collecting electrode plate 34
Is calculated and the charging status is checked for each cycle, the charging status is always checked under the same dust collecting electrode plate 34 (that is, the same condition), and a change in the charging status can be accurately detected. it can.
【００２７】なお、上述した実施の形態では、モータ２
４とモータ３８を同期回転させたが、これに限定するも
のではない。また、集塵極板３４の移動速度の検出は、
上述した実施の形態に限定するものではない。In the above-described embodiment, the motor 2
4 and the motor 38 are synchronously rotated, but the invention is not limited to this. Further, the detection of the moving speed of the dust collecting electrode plate 34 is performed by
The present invention is not limited to the above embodiment.
【００２８】[0028]
【発明の効果】以上説明したように、本発明に係る移動
電極形電気集塵装置の制御方法では、集塵極板の移動周
期ごとに集塵極板の移動速度を最適化するので、構成部
品の著しい磨耗や集塵性能の低下を防止することができ
る。As described above, in the control method of the moving electrode type electrostatic precipitator according to the present invention, the moving speed of the dust collecting electrode plate is optimized for each moving period of the dust collecting electrode plate. It is possible to prevent significant wear of parts and deterioration of dust collection performance.
【図１】移動電極形電気集塵装置の全体構成図1] Overall configuration diagram of a moving electrode type electrostatic precipitator
【図２】移動電極形電気集塵装置１０とその電源回路と
の回路構成図FIG. 2 is a circuit configuration diagram of a moving electrode type electrostatic precipitator 10 and its power supply circuit.
【図３】荷電状況の判断方法を説明する説明図FIG. 3 is an explanatory diagram illustrating a method of determining a charging status.
【図４】本発明に係る移動電極形電気集塵装置の制御方
法を示すフローチャートFIG. 4 is a flowchart showing a control method of the moving electrode type electrostatic precipitator according to the present invention.
【図５】従来の移動電極形電気集塵装置の全体構成図FIG. 5 is an overall configuration diagram of a conventional moving electrode type electrostatic precipitator.
１０…移動電極形電気集塵装置 １８…集塵室 ２０…駆動軸 ２４…モータ ２８…無端チェーン ３４…集塵極板 ３６…回転ブラシ ３８…駆動モータ ４２…放電極 ４６…インバータ ４８…荷電制御装置 ５０…整流器付変圧器 ５８…電力制御素子 ６０…電力制御回路 ６２…マイクロコンピュータ ７０…荷電電圧検出装置 ７２…放電電流検出装置 10 ... Moving electrode type electrostatic precipitator 18 ... Dust collection chamber 20 ... Drive shaft 24 ... Motor 28 ... Endless chain 34 ... Dust collecting electrode plate 36 ... Rotating brush 38 ... Drive motor 42 ... Discharge electrode 46 ... Inverter 48 ... Charge control device 50 ... Transformer with rectifier 58 ... Power control element 60 ... Power control circuit 62 ... Microcomputer 70 ... Charge voltage detection device 72 ... Discharge current detection device
Claims (2)
数の集塵極板と該集塵極板に対向して配置された放電極
との間に荷電電圧を印加してダストを前記集塵極板に捕
集するとともに、前記集塵極板に当接して設けたブラシ
によって前記集塵極板に捕集したダストを払い落とす移
動電極形電気集塵装置の制御方法において、 前記周回移動する集塵極板の移動速度を検出し、該検出
値から集塵極板の周期を演算し、 該演算した集塵極板の周期ごとに、前記放電極と前記集
塵極板における荷電状況を確認し、 該確認した荷電状況に基づいて、前記周回移動する集塵
極板の移動速度を調整することを特徴とする移動電極形
電気集塵装置の制御方法。1. A dust is formed by applying a charging voltage between a plurality of dust collecting electrode plates that move around in a dust collecting region and a non-dust collecting region, and a discharge electrode that is arranged so as to face the dust collecting electrode plates. In the method of controlling a moving electrode type electrostatic precipitator that collects the dust on the dust collecting electrode plate, and brushes off the dust collected on the dust collecting electrode plate by a brush provided in contact with the dust collecting electrode plate, The moving speed of the circulating dust collecting electrode plate is detected, the cycle of the dust collecting electrode plate is calculated from the detected value, and the discharge electrode and the dust collecting electrode plate are calculated for each calculated cycle of the dust collecting electrode plate. The method of controlling a moving electrode type electrostatic precipitator is characterized in that the moving speed of the orbiting dust collecting electrode plate is adjusted based on the confirmed charging state.
された放電電流と前記荷電電圧の関係である荷電特性を
計測することにより行われることを特徴とする請求項１
の移動電極形電気集塵装置の制御方法。2. The confirmation of the charging state is performed by measuring a charging characteristic which is a relationship between a discharge current applied to the discharge electrode and the charging voltage.
Method for controlling moving electrode type electrostatic precipitator of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31789398A JP3484687B2 (en) | 1998-11-09 | 1998-11-09 | Control method of moving electrode type electrostatic precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31789398A JP3484687B2 (en) | 1998-11-09 | 1998-11-09 | Control method of moving electrode type electrostatic precipitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000140689A JP2000140689A (en) | 2000-05-23 |
| JP3484687B2 true JP3484687B2 (en) | 2004-01-06 |
Family
ID=18093238
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31789398A Expired - Fee Related JP3484687B2 (en) | 1998-11-09 | 1998-11-09 | Control method of moving electrode type electrostatic precipitator |
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| Country | Link |
|---|---|
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009072743A (en) * | 2007-09-25 | 2009-04-09 | Hitachi Plant Technologies Ltd | Mobile electrode type electrostatic precipitator |
| JP5018709B2 (en) * | 2008-09-11 | 2012-09-05 | 株式会社日立プラントテクノロジー | Moving electrode type electrostatic precipitator and method for carrying in member of moving electrode type electrostatic precipitator |
| JP5513939B2 (en) * | 2010-03-11 | 2014-06-04 | 株式会社日立製作所 | Electric dust collector |
| JP7011486B2 (en) | 2018-02-16 | 2022-01-26 | 三菱重工パワー環境ソリューション株式会社 | Plant equipment monitoring and control system and plant equipment monitoring and control method |
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