JPS6025560A - Control apparatus of electric dust collecting apparatus - Google Patents
Control apparatus of electric dust collecting apparatusInfo
- Publication number
- JPS6025560A JPS6025560A JP13409483A JP13409483A JPS6025560A JP S6025560 A JPS6025560 A JP S6025560A JP 13409483 A JP13409483 A JP 13409483A JP 13409483 A JP13409483 A JP 13409483A JP S6025560 A JPS6025560 A JP S6025560A
- Authority
- JP
- Japan
- Prior art keywords
- discharge electrode
- voltage
- current
- hammering
- dust
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 239000012717 electrostatic precipitator Substances 0.000 claims description 11
- 239000012716 precipitator Substances 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
- B03C3/763—Electricity supply or control systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Electrostatic Separation (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電気集塵装置に係り、特に複数の集塵極と各集
塵極間に対向して配置された放電極とを備え、高抵抗ダ
ストを捕集する電気集塵装置の制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic precipitator, and more particularly, the present invention relates to an electrostatic precipitator that is equipped with a plurality of dust collecting electrodes and a discharge electrode disposed facing each other between the dust collecting electrodes, and that collects high-resistance dust. The present invention relates to a control device for a dust collector.
一般に電気集塵装置内の集塵極、放電極に高抵抗ダスト
がある量付着した場合、逆電Ｆ４現象が発生し、各電極
へ印加される直流高電圧の電圧−電流特性は第１図、第
２図の如き様相を呈し、集塵機能が大幅に低下する欠点
がある。即ち第１図では集塵極に高抵抗ダストが１１着
した場合の電圧−電流特性を示し、実線が正常電離状態
を示し、破線が逆電離状態を示している。また第２図で
は放電極に高抵抗ダストが（＝Ｊ着した場合の電圧−電
流特性を示し、実線が正常電離状態を示し破線が逆電離
状態を示している。Generally, when a certain amount of high-resistance dust adheres to the dust collection electrode and discharge electrode in an electrostatic precipitator, a reverse electric current F4 phenomenon occurs, and the voltage-current characteristics of the DC high voltage applied to each electrode are shown in Figure 1. , as shown in FIG. 2, and has the disadvantage that the dust collection function is significantly reduced. That is, FIG. 1 shows the voltage-current characteristics when 11 pieces of high-resistance dust are deposited on the dust collection electrode, where the solid line shows the normal ionization state and the broken line shows the reverse ionization state. Further, FIG. 2 shows the voltage-current characteristics when high-resistance dust (=J) is deposited on the discharge electrode, where the solid line shows the normal ionization state and the broken line shows the reverse ionization state.
従来、電気集塵装置においてはこのような逆電離現象の
発生に対して主として集塵極側のダスト堆積対策として
、
（１）特殊荷電方式等の荷電技術による方法（２）加熱
集塵電極や槌打装置の替わりに極板表面ダストを掻落す
方式等集塵極構造による方法（３）電気集塵装置の入口
ガスを調湿する方法等が提案されており、放電極側に対
しζは何の配慮も為されていなかった。即ら集塵極と同
様に放電極へのジスト堆積防止も安定荷電や集塵機能の
維持の面で重要性があるにも拘わらず何の対策も施され
ていなかった。Conventionally, in electrostatic precipitators, the main countermeasures against the occurrence of such reverse ionization phenomena are: (1) methods using charging technology such as special charging methods; (2) heating dust collecting electrodes and Instead of a hammering device, a method using a dust collection electrode structure such as a method of scraping off the dust on the electrode plate surface (3) A method of controlling the humidity of the inlet gas of an electrostatic precipitator has been proposed. No consideration was given. That is, like the dust collecting electrode, no measures have been taken to prevent mist from accumulating on the discharge electrode, even though this is important in terms of stable charging and maintaining the dust collecting function.
本発明は逆電離時における電圧−電流特性のヒステリシ
ス現象が放電極に堆積したダストによって主に発生ずる
ことを突き止め、このことに基づき逆電離が集塵極に堆
積したダストに起因するか放電極に堆積したダストに起
因するかを判別し、その結果により放電極に対する槌打
機構駆動用モータを制御し、逆電１４１ｉ現象に対する
対策を放電極側に施し、集塵機能を低下させないことを
目的としている。The present invention has found that the hysteresis phenomenon in voltage-current characteristics during reverse ionization is mainly caused by dust deposited on the discharge electrode, and based on this, it is possible to determine whether reverse ionization is caused by dust deposited on the collecting electrode. The purpose is to determine whether the problem is caused by dust accumulated on the discharge electrode, and to control the motor for driving the hammering mechanism for the discharge electrode based on the result, and to take measures against the reverse electric charge 141i phenomenon on the discharge electrode side, so as not to deteriorate the dust collection function. There is.
本発明は前記目的を達成する為に放電極の電流ヒステリ
シス値を検出する検出器を設け、該検出器からの検出値
に応じて放電極の槌打機構駆動用モータを制御し、槌打
インターバルの調節又は槌打力を調整する制御装置を設
けたごとを特徴とする。In order to achieve the above object, the present invention provides a detector for detecting the current hysteresis value of the discharge electrode, controls the motor for driving the hammering mechanism of the discharge electrode according to the detected value from the detector, and controls the hammering interval. The invention is characterized by the provision of a control device for adjusting the force of the hammer or the hammering force.
以下添イ１図面に従って本発明に係る電気集塵装置の制
御装置の好ましい実施例を詳説する。A preferred embodiment of the control device for an electrostatic precipitator according to the present invention will be described in detail below with reference to the accompanying drawings.
第３図において電気集塵装置の制御装置の概略構造が示
され、ｌＯは電気集塵装置、この電気’ＡＭ装置１０内
には所定間隔で図示しない集塵電極が配設され、この集
塵電極の間には放電極１２が配設されている。この放電
極１２には直流発生装置１４から直流高電圧力１印加さ
れる。また１６ば放電極槌ＩＪ装置、１８は槌打装置１
６の駆動モータ、２０は駆動モータ１８の制御部である
。In FIG. 3, a schematic structure of a control device for an electrostatic precipitator is shown, where lO is an electrostatic precipitator, and dust collecting electrodes (not shown) are arranged at predetermined intervals in this electric AM device 10. A discharge electrode 12 is arranged between the electrodes. A DC high voltage force 1 is applied to this discharge electrode 12 from a DC generator 14 . 16 is a discharge electrode hammer IJ device, and 18 is a hammer device 1.
6 is a drive motor, and 20 is a control unit for the drive motor 18.
一方直流発生装置１４に交流高電圧を出力する変圧器２
２、変圧器２２の出力を整流する整流器２４が設けられ
、整流器２４と直列に電流検出器２６が設けられ、また
整流器２４と並列に電圧検出器２８が設げられている。On the other hand, a transformer 2 outputs an AC high voltage to a DC generator 14.
2. A rectifier 24 for rectifying the output of the transformer 22 is provided, a current detector 26 is provided in series with the rectifier 24, and a voltage detector 28 is provided in parallel with the rectifier 24.
電流検出器２６並びに電圧検出器２８の検出信号は制御
部３０に入力される。この制御部３０は雨検出器２６．
２８の検出に基づいてモータ駆動用制御部２０並びに直
流発生装置１４の出力を制御する。Detection signals from the current detector 26 and voltage detector 28 are input to the control section 30. This control section 30 is connected to the rain detector 26.
Based on the detection of 28, the output of the motor drive control section 20 and the DC generator 14 is controlled.
前記の如く構成された本発明に係る実施例の作用は次の
通りである。まず実施例に於いては一ロー回程度直流発
生装置１４の出力電流を増減し、第２図に示すような電
圧−電流特性をサンプリングする。即ち電流検出器２６
、電圧検出器２８からの値に基づき１、放電極の電圧−
電流特性をとり、ある印加電圧ａ点における電流ヒステ
リシス値（Ｃ−ｂ）を得、この値の大小から駆動モータ
１８を制御する。即ちこの上ステリシス値が大きい時に
は逆電離現象発生の原因は主として放電極１２側にある
ので、放電極１２にダストが付着していると考えられ、
従って制御部２０に制御部３０から指令信号が入力され
、モータ１８を制御することにより槌打のインターバル
を早めたり、槌打力を強くしたりする。槌打回数、又は
槌打力の強弱しまヒステリシス値の大小によって決定さ
れる。尚出力電流を変化させる際には、通常運転時より
は印加電圧奪一旦下げ、コロナ開始電圧（コロナ電流を
発生し始める電圧）からスタートしヒステリシス特性を
検出することが好ましい。通常運転時からスタートして
ヒステリシス特性を検出すると明確なヒステリシス特性
は得にくい。The operation of the embodiment according to the present invention constructed as described above is as follows. First, in the embodiment, the output current of the DC generator 14 is increased or decreased about one row, and the voltage-current characteristics as shown in FIG. 2 are sampled. That is, the current detector 26
, 1 based on the value from the voltage detector 28, the voltage of the discharge electrode -
The current characteristics are taken, a current hysteresis value (Cb) at a certain applied voltage point a is obtained, and the drive motor 18 is controlled based on the magnitude of this value. In other words, when the steresis value is large, the cause of the reverse ionization phenomenon is mainly on the discharge electrode 12 side, so it is considered that dust is attached to the discharge electrode 12.
Therefore, a command signal is input from the control section 30 to the control section 20, and by controlling the motor 18, the hammering interval is shortened and the hammering force is increased. It is determined by the number of hammer strikes or the strength of the hammer strike force and the magnitude of the hysteresis value. When changing the output current, it is preferable to once lower the applied voltage than during normal operation, start from the corona start voltage (voltage at which corona current begins to be generated), and detect the hysteresis characteristic. If the hysteresis characteristic is detected starting from normal operation, it is difficult to obtain a clear hysteresis characteristic.
尚ヒステリシス値の値が小さい場合には、逆電離現象の
発生は集塵極側に原因があると考えられるので、集塵極
側のダスト脱離手段（槌打機構、ブラシ等）の駆動面構
を調節する。If the hysteresis value is small, the occurrence of the reverse ionization phenomenon is thought to be caused by the dust collecting electrode, so the driving surface of the dust removal means (hammering mechanism, brush, etc.) on the collecting electrode side Adjust the structure.
前記実施例に於いて放電極槌打機構は種々のものが考え
られ、機械式の回転ハンマ方式、電磁槌打方式等の機構
が考えられる。In the embodiments described above, various types of discharge electrode hammering mechanism can be considered, including a mechanical rotary hammer type, an electromagnetic hammer type, and the like.
以上説明したように本発明に係る電気集塵装置の制御装
置によれば逆電離現象発生時に放電極側の電圧−電流特
性を検出し、この電圧−電流特性にヒステリシスが発生
した場合に放電極側の槌打機構の駆動モータを制御し、
放電極側のダストを除去し逆電離現象の発生を防止する
ことができるAs explained above, according to the control device for an electrostatic precipitator according to the present invention, the voltage-current characteristic on the discharge electrode side is detected when a reverse ionization phenomenon occurs, and when hysteresis occurs in this voltage-current characteristic, the discharge electrode Controls the drive motor of the side hammering mechanism,
Dust can be removed from the discharge electrode side and the occurrence of reverse ionization phenomenon can be prevented.
第１図は集塵極の電圧−電流特性を示す説明図、第２図
は放電極の電圧−電流特性を示す説明図、第３図は本実
施例の概略構造を示すプロ・ツク図ある。
１０・・・電気集塵装置、 １２・・・放電極、 １４
・・・直流発生装置、 １６・・・槌打機構、 １８・
・・槌打機構駆動用モータ、 ２０・・・モータ制御部
、 ２６・・・電流検出器、 ２日・・・電圧検出器、
３０・・・制御部。
出願人 日立プラント建設株式会社
第１図
Ｅｅ、ユＶ−
第２図
電圧■□
第３図Fig. 1 is an explanatory diagram showing the voltage-current characteristics of the dust collection electrode, Fig. 2 is an explanatory diagram showing the voltage-current characteristics of the discharge electrode, and Fig. 3 is a program diagram showing the schematic structure of this embodiment. . 10... Electrostatic precipitator, 12... Discharge electrode, 14
...DC generator, 16. Hammering mechanism, 18.
... Hammer driving mechanism drive motor, 20... Motor control unit, 26... Current detector, 2nd... Voltage detector,
30...control unit. Applicant Hitachi Plant Construction Co., Ltd. Figure 1 Ee, U V- Figure 2 Voltage ■□ Figure 3
Claims (1)
Ｉ′／えた電気集塵装置において、放電極を槌打する機
構を駆動する駆動用モータと、所定印加電圧における放
電極の電流ヒステリシス値を検出する検出部と、電流ヒ
ステリシス値の大きさに応じて放電極槌打インターバル
又は槌打力を調節する前記モータを制御する制御部とか
ら成ることを特徴とする電気集塵装置の制御装置。The dust collection electrode and the discharge electrode placed opposite to the dust collection electrode are
I'/Eta electric precipitator includes a drive motor that drives the mechanism for hammering the discharge electrode, a detection unit that detects the current hysteresis value of the discharge electrode at a predetermined applied voltage, and 1. A control device for an electrostatic precipitator, comprising: a controller that controls the motor that adjusts the discharge electrode hammering interval or the hammering force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13409483A JPS6025560A (en) | 1983-07-22 | 1983-07-22 | Control apparatus of electric dust collecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13409483A JPS6025560A (en) | 1983-07-22 | 1983-07-22 | Control apparatus of electric dust collecting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6025560A true JPS6025560A (en) | 1985-02-08 |
| JPS6141252B2 JPS6141252B2 (en) | 1986-09-13 |
Family
ID=15120288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13409483A Granted JPS6025560A (en) | 1983-07-22 | 1983-07-22 | Control apparatus of electric dust collecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05182682A (en) * | 1991-12-27 | 1993-07-23 | Honda Motor Co Ltd | Humidified gas preheater for fuel cell system and its preheating method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0192650U (en) * | 1987-12-14 | 1989-06-16 |
-
1983
- 1983-07-22 JP JP13409483A patent/JPS6025560A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05182682A (en) * | 1991-12-27 | 1993-07-23 | Honda Motor Co Ltd | Humidified gas preheater for fuel cell system and its preheating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6141252B2 (en) | 1986-09-13 |
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