JPH0250791B2 - - Google Patents
Info
- Publication number
- JPH0250791B2 JPH0250791B2 JP18525585A JP18525585A JPH0250791B2 JP H0250791 B2 JPH0250791 B2 JP H0250791B2 JP 18525585 A JP18525585 A JP 18525585A JP 18525585 A JP18525585 A JP 18525585A JP H0250791 B2 JPH0250791 B2 JP H0250791B2
- Authority
- JP
- Japan
- Prior art keywords
- charging
- intermittent
- dust
- dust collection
- voltage
- 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
Links
- 239000000428 dust Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 10
- 239000012717 electrostatic precipitator Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Electrostatic Separation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は集塵部に直流高電圧を供給する高圧
荷電時間と、その荷電を一時的に休止する荷電休
止時間とを交互に繰り返して運転する間欠荷電方
式電気集塵装置の運転方法の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention operates by alternately repeating a high-voltage charging time in which a high DC voltage is supplied to a dust collecting section and a charging pause time in which the charging is temporarily stopped. This invention relates to an improvement in the operating method of an intermittent charging electrostatic precipitator.
一般に比抵抗が1010〜1011Ω・cmを越える様な
高抵抗のダストを集塵する場合、集塵装置内にて
逆電離現象が生じて、集塵効率を低下されること
が良く知られている。斯る逆電離現象の発生防止
対策の一つとして、商用電源の１サイクル乃至10
サイクル程度の範囲内で集塵部へ直流電圧を供給
する荷電時間とその荷電を一時的に休止する荷電
休止時間とを交互に繰り返すことにより、逆電離
の発生を防止すると共に省電力効果もある間欠荷
電方式が提案されている。
Generally, when collecting high-resistance dust with a resistivity exceeding 10 10 to 10 11 Ω・cm, it is well known that a reverse ionization phenomenon occurs within the dust collector, reducing the dust collection efficiency. It is being As one of the measures to prevent the occurrence of such reverse ionization phenomenon, one cycle of commercial power supply
By alternately repeating the charging time in which DC voltage is supplied to the dust collection part and the charging pause time in which the charging is temporarily stopped within a range of about a cycle, it is possible to prevent the occurrence of reverse ionization and also to save power. An intermittent charging method has been proposed.
第２図はダストの電気抵抗と荷電電圧、放電電
流、集塵率との関係を示すが、高抵抗ダスト領域
における完全な逆電離現象の発生する一歩手前の
領域では火花発生頻度が増大し、比較的高電圧は
得られるものの、放電電流は激減し、火花発生、
火花からアーキングへの移行防止の為の強制荷電
停止（半サイクル〜１サイクル）、再荷電のモー
ドを繰り返し、非荷電時間の増大に伴い集塵作用
に必要なコロナパワーも減少し、集塵効率ηも低
下する事になる。この領域で、間欠荷電方式で運
転すると、前述の火花発生による強制荷電停止
と、間欠荷電による荷電休止期間が作用し、集塵
効率ηを更に低下させることになる。 Figure 2 shows the relationship between electrical resistance of dust, charging voltage, discharge current, and dust collection rate. In the high-resistance dust region, just before complete reverse ionization occurs, the frequency of spark generation increases. Although a relatively high voltage can be obtained, the discharge current is drastically reduced and sparks are generated.
Forced charging stop (half cycle to 1 cycle) and recharging mode are repeated to prevent the transition from spark to arcing, and as the non-charging time increases, the corona power required for dust collection decreases, improving dust collection efficiency. η will also decrease. If the intermittent charging method is operated in this region, the forcible charging stop due to spark generation and the charging suspension period due to intermittent charging will occur, further reducing the dust collection efficiency η.
この発明の目的は斯る間欠荷電方法の欠点を解
消し、火花頻発高抵抗ダスト領域での集塵装置の
集塵効果の低下を少くし、安定運転可能な電気集
塵装置の運転方法を提供するにある。
The purpose of the present invention is to provide a method of operating an electrostatic precipitator that eliminates the drawbacks of such an intermittent charging method, reduces the deterioration of the dust collection effect of the dust collector in a high-resistance dust region where sparks occur frequently, and enables stable operation. There is something to do.
この発明は火花頻発高抵抗ダスト領域での電気
集じん装置の運転において、間欠荷電実施後の連
続荷電時の集塵性能が向上し、更に経時的に低下
してゆくことを実験的に確認し、火花頻発高抵抗
ダスト領域での集塵性能低下防止手段として「間
欠荷電方式」→「連続荷電方式」→「間欠荷電方
式」と荷電モードを自動的に切り替えるように構
成したものである。
This invention has experimentally confirmed that when operating an electrostatic precipitator in a high-resistance dust region where sparks occur frequently, the dust collection performance improves during continuous charging after intermittent charging, and further deteriorates over time. The charging mode is configured to automatically switch from "intermittent charging method" to "continuous charging method" to "intermittent charging method" as a means to prevent deterioration in dust collection performance in a high-resistance dust region where sparks occur frequently.
第１図はこの発明に係る電気集塵装置の運転方
法の１実施例のフローダイヤグラムを示す。
FIG. 1 shows a flow diagram of one embodiment of a method of operating an electrostatic precipitator according to the present invention.
電源装置において、荷電電流の増加等より成る
火花検出部と同火花発生回数を積分的に発生頻度
に置き換え、更に記憶可能な火花検知装置により
「間欠荷電モード」選択された状態にて火花検知
頻度が設定頻度Ns以上の状態がタイマー１で設
定された時間以上継続した場合、荷電制御モード
切替スイツチにより自動的に「連続荷電モード」
に切替えられる。「連続荷電モード」では「間欠
荷電モード」での槌打時のダスト剥離効果上昇等
の効果により、無火花又は少頻度火花の比較的安
定荷電状態が得られ、集塵性能は一時的に向上す
るが経時的に荷電電圧は上昇し、電流は減少し再
び火花発生頻度が増大する傾向が生じてくる。火
花頻度が設定頻度Ns′以上の状態がタイマー２で
設定された時間以上継続した場合、荷電モードを
「間欠荷電モード」に荷電制御モード切替スイツ
チにより自動的に切替えられるように構成した。 In the power supply device, the number of sparks generated by the spark detection unit, which consists of an increase in charging current, etc. is integrally replaced with the frequency of occurrence, and the spark detection frequency is determined by the memorizable spark detection device in the state where "intermittent charging mode" is selected. If the condition where the frequency exceeds the set frequency Ns continues for more than the time set in timer 1, the charge control mode changeover switch automatically switches to "continuous charge mode".
can be switched to In the "continuous charging mode", a relatively stable charging state with no sparks or infrequent sparks can be obtained due to the effect of increasing the dust removal effect during hammering in the "intermittent charging mode", and the dust collection performance is temporarily improved. However, over time, the charging voltage increases, the current decreases, and the frequency of spark generation tends to increase again. If the spark frequency continues to be equal to or higher than the set frequency Ns' for a period of time set by the timer 2, the charging mode is automatically switched to the "intermittent charging mode" by the charging control mode changeover switch.
「連続荷電」以後の「間欠荷電モード」では、
当初集塵極板堆積ダスト厚みの影響で、間欠荷電
による集塵性能向上効果が得られる。この様に、
「間欠荷電」「連続荷電」の利点を組み合せ、集塵
装置のトータル集塵効率を上げるように構成した
ものである。 In "intermittent charging mode" after "continuous charging",
Depending on the initial thickness of the dust deposited on the dust collection electrode plate, intermittent charging can improve dust collection performance. Like this,
It is designed to combine the advantages of "intermittent charging" and "continuous charging" to increase the total dust collection efficiency of the dust collector.
この発明は、集塵部に直流高電圧を供給する高
圧荷電とその荷電を一時的に休止する荷電休止を
交互に繰り返して運転する間欠荷電方式電気集塵
装置において、火花発生頻発状態を検出すること
により「間欠荷電」→「連続荷電」→「間欠荷
電」に自動的に切り替え運転継続をする運転方法
を採用したから、火花頻発高抵抗ダスト領域での
集塵性能の低下を防止することができる。
This invention detects frequent occurrence of sparks in an intermittent charging type electrostatic precipitator that operates by alternately repeating high-voltage charging that supplies high DC voltage to a dust collecting section and charging pause that temporarily stops charging. As a result, we have adopted an operating method that automatically switches from "intermittent charging" to "continuous charging" to "intermittent charging" and continues operation, which prevents deterioration in dust collection performance in high-resistance dust areas where sparks occur frequently. can.
第１図はこの発明に係る電気集塵装置の運転方
法の１実施例のフローダイヤグラム、第２図はダ
ストの電気抵抗と荷電電圧、放電電流、集塵率と
の関係図である。
FIG. 1 is a flow diagram of one embodiment of the method of operating an electrostatic precipitator according to the present invention, and FIG. 2 is a diagram showing the relationship between the electric resistance of dust, charging voltage, discharge current, and dust collection rate.
Claims (1)
の荷電を一時的に休止する荷電休止を交互に繰り
返して運転する間欠荷電方式電気集塵装置におい
て、火花発生頻発状態を検出することにより「間
欠荷電」→「連続荷電」→「間欠荷電」に自動的
に切り替え、運転継続をすることを特徴とする電
気集塵装置の運転方法。1. In an intermittent charging electrostatic precipitator that operates by alternately repeating high-voltage charging that supplies high DC voltage to the dust collection section and charging pause that temporarily halts the charging, by detecting the frequent occurrence of sparks, A method of operating an electrostatic precipitator characterized by automatically switching from "intermittent charging" to "continuous charging" to "intermittent charging" and continuing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18525585A JPS6245361A (en) | 1985-08-23 | 1985-08-23 | Method of operating electric dust precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18525585A JPS6245361A (en) | 1985-08-23 | 1985-08-23 | Method of operating electric dust precipitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6245361A JPS6245361A (en) | 1987-02-27 |
| JPH0250791B2 true JPH0250791B2 (en) | 1990-11-05 |
Family
ID=16167614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18525585A Granted JPS6245361A (en) | 1985-08-23 | 1985-08-23 | Method of operating electric dust precipitator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6245361A (en) |
-
1985
- 1985-08-23 JP JP18525585A patent/JPS6245361A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6245361A (en) | 1987-02-27 |
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