JPS5879561A - Electrostatic precipitator - Google Patents

Abstract

PURPOSE:To improve dust collecting performance and to reduce power consumption by performing charging and suspension of charging during charging cycle instantaneously within the limit of reverse ionization time constant and performing application and suspension of output voltage to the electrostatic precipitator at a short period. CONSTITUTION:In an electrostatic precipitator provided with a saturable reactor 4 as a charging electric power source, a phase controlling circuit 3 provided with a forcing circuit that performs charging cycle consisting of normal direction forcing charging of saturable reactor exciting circuit and reversing of charging polarity and suspension of charging is controlled by the signal of a current detecting device 2 as both side arms of a thyristor 1. By performing charging and suspension of charging during charging cycle instantaneously within the limit of reverse ioization time constant, application and suspension of output voltage to the electrostatic precipirator are made at a short period. Exciting current is decreased sharply before dust of high specific volume resistivity causes reverse ionization, and occurrence of reverse ionization phenomenon can be evaded.

Description

【発明の詳細な説明】 本発明はｆＩＬｇｌ、ＪＫＩＩＩｌ装置に係わｐ、更に
靜わしくは可飽和リアクトルＩＩＩ謔回路を有する１に
蒐集−装瀘における逆電離現象の発生を可及的に防止し
、巣膳性鱈の向上と消費電力の減少を可鱈にする電気集
塵装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to fILgl and JKIIIl devices, and more particularly, to prevent as much as possible the occurrence of reverse ionization phenomena in collection and storage in 1 having a saturable reactor III switching circuit. The present invention also relates to an electrostatic precipitator that can improve the ability of cod to nest and reduce power consumption.

コロナ放電を行なわせるための放電極と、汚染ガス中の
粉塵を付着、５Ａｌｌさせるための集塵極とを有する１
１に気Ｓ膳装置に３いては、従来、集塵電流を高く保持
するために果１ｉｌｌ電内で発生する火花放′＃１な検
出し、その検出した火花放磁の一敗を単位時間当ｐ所定
値内に維持するように集塵ｆｉＭ−の高圧１に源の電圧
を制−する火花放電の頻ぽによる電圧ｉ＃Ｉ制御方式が
あった。しかし、このような方式の電気集塵装置によシ
、例えば焼結ダストのような′Ｉ１ｇＬ的な体１１１固
有抵抗率の大きな粉塵（１０〜１０１ｊ−５１）を含ん
だ汚染ガスな処塙しようとする場合、、集−彎に付着し
た粉−は容易にその′＠荷ｅ失わず、従って１１５＋！
的鏡像力によシ強く巣膳板に付着し一通常の１４ｋＪｉ
ｌｌｉ板付層粉烏払落し方法では十分に払落しができな
かった。1, which has a discharge electrode for causing corona discharge and a dust collection electrode for attaching and collecting dust in the contaminated gas;
Conventionally, in order to maintain a high dust collection current, a spark discharge device is used to detect the spark discharge generated within the current, and the failure of the detected spark discharge is measured for a unit time. There is a voltage i#I control method based on the frequency of spark discharge, which controls the source voltage to the high voltage 1 of the dust collector fiM- so as to maintain the voltage i#I within a predetermined value. However, this type of electrostatic precipitator cannot handle contaminated gas containing dust (10 to 101j-51) with a high specific resistivity, such as sintering dust. In this case, the powder adhering to the curvature does not easily lose its charge, so 115+!
It strongly adheres to the nesting board due to the mirror image force, and the normal 14kJi
It was not possible to remove the powder sufficiently using the method of removing the powder from the layer with a lli plate.

すなわち、ｓｍ板に上記した憬な磁気的な体積ｔｇｉ抵
抗率の大きな粉−が堆積した状−で集塵を継続しようと
すると・堆積層内で１或的絶縁破壊を起こし、いわゆる
逆電−現象が艙電俵１．０〜２０謝の時定数をもって＊
角するため、使用電力に比較して集塵総力が着しく阻沓
されるという欠点があった。In other words, if you try to continue collecting dust with the above-mentioned powder having a large magnetic volume TGI resistivity deposited on the SM plate, a certain dielectric breakdown will occur in the deposited layer, and a so-called reverse charge will occur. The phenomenon has a time constant of 1.0 to 20 times *
Because of the angle, there was a drawback that the total dust collection power was severely hampered compared to the power used.

ところで電気集塵装置の０Ｍ電電源としてサイリスター
路を採用した場合には−その時′ＩＭＷｋがＩｓ寮上極
めて迩いためにＳ源制御回路によ）＃電を間欠的に行な
うことによｎａ電離現象を防止することができるが、そ
の反−電流波形が悪いために交流電流としての貢効値は
、平均値の１．５〜２倍にもなり、同一の直流出力電流
定格に対して高圧変圧−および整流−の６慮を大きく選
ぶ必要があった。また同じく荷電′４源として可飽和リ
アクトル回路を採用した場合には、その時定款が０．４
〜１゜０蹴柵度であるため上記したすイリスタ回路の場
合の砿に鴫源制御回路を用いて短時間に間欠的な＃域を
行なうことは不可能であ如、仮に可飽和リアタトル回路
を採用しても集塵性能の劣化を招くことは必定であった
。By the way, when a thyristor path is adopted as the 0M power source of an electrostatic precipitator, the ionization phenomenon occurs due to the intermittent application of power by the S source control circuit because the IMWk is extremely high above the Is dormitory. However, due to the poor reverse current waveform, the contribution value as AC current is 1.5 to 2 times the average value, and it is difficult to convert high voltage transformer for the same DC output current rating. - and rectification - six major considerations had to be made. Similarly, if a saturable reactor circuit is adopted as the charge source, the articles of incorporation will be 0.4.
Since the degree of kickback is ~1°0, it is impossible to perform intermittent # range in a short period of time by using a control circuit in the case of the above-mentioned Iristor circuit. Even if this was adopted, it was inevitable that the dust collection performance would deteriorate.

本発明は上記陶雇点に鑑みてなされたも−のであシー集
−性眺に大きな影響をおよぼす逆電ｍｍ象の発生な可及
的に防止し、電気的な体積固有抵抗率の大きな粉塵にお
いても効果的な集塵を行ない得る４ｆｉ集塵装置を提供
せんとするものである。The present invention has been made in view of the above-mentioned problems, and is intended to prevent as much as possible the occurrence of reverse electric phenomena that have a great influence on the physical appearance, and to reduce dust particles with a large specific electrical volume resistivity. It is an object of the present invention to provide a 4-fi dust collector that can perform effective dust collection even in the case of the present invention.

以下・本Ｓ１明の一犬施例な示す添付図面に基づいて説
明する。Hereinafter, an example of this book S1 will be explained based on the accompanying drawings.

蘂１図は、本発明に係る鴫ｆｉ集塵装置におけるｕＩＩ
ｌｉｉ和りアクシルの励磁電圧の＃電特性図、第２図は
第１図に対応する励磁電流特性図、嬉６図は同じく出力
１１ＥＥ特性図である。Figure 1 shows uII in the Shirofi dust collector according to the present invention.
Figure 2 is an exciting current characteristic diagram corresponding to Figure 1, and Figure 6 is an output 11EE characteristic diagram.

すなわち、本発明に係る４蒐集ｍ装置は、所定の荷電サ
イクル１．仁４１１共調ミニ、の範囲内において通常方
向の７オーシングＷｔ電を１１時間行い、しかる債逆′
１ｍ＃ｌｔ時定畝の範囲内で瞬間的に可飽和リアクトル
励磁回路の荷電極ｉ！１ｉな反転させてｔ−関のｍ５ｒ
ｔ行ない、次の通？！Ｉ荷１１サイクルまで１１時間の
荷電体止を行なうようにしたものである（第１図１１１
）、その結果、可飽和リアクトルの励磁電流は嬉２図に
示す即くなると共に出力１ｇ圧も第６図に示す即くなる
。つ！ｉｐ電気的な体積一層抵抗率の大きな粉膳が逆ｌ
Ｋ＃１１な生起する前に励磁電流が激減して逆電−現象
の発生を一路するものである。That is, the 4-collection device according to the present invention has a predetermined charging cycle 1. Jin 411 synchronized mini, perform 7 orsing Wt electricity in the normal direction for 11 hours within the range of
The charged electrode i of the saturable reactor excitation circuit momentarily within the range of 1m#lt time-determined ridge! 1i inversion and t-seki m5r
T go, next call? ! The charged body is stopped for 11 hours until the 11th cycle of the I charge (see Figure 1111).
), as a result, the excitation current of the saturable reactor becomes the same as shown in Figure 2, and the output 1g pressure also becomes the same as shown in Figure 6. One! ip electrical volume resistivity is higher than that of inverted l
The excitation current is drastically reduced before K#11 occurs, thereby preventing the occurrence of the reverse electric phenomenon.

なお、可飽和リアクトル励磁回路の荷電極性の反転な行
なわない場合には残響ヒステリシスによ、０１１３図破
線の如くになる。Note that if the charge polarity of the saturable reactor excitation circuit is not reversed, the result will be as shown by the broken line in Figure 0113 due to reverberation hysteresis.

４４図は本発明に係る電−集ｍ装置における荷電１ｇ回
路の一爽施例を示したもので、図中（１）はすイリスタ
、（２）は電流検出装置、（８）は７オ一シング回路付
位相１ＩｌＩｌ１１１回路、（４）は可飽和リアクトル
である、つまり、サイリスタ（１）は両側アームとして
電流構出−一（２）を設け、この電流検出装置（２）の
信号に基づいてフォーシング回絡付位相制御回路を制御
して、７オーシング電圧を可飽和リアクトル（４）に付
加し、かつ＃鬼の制御を行なうものである。すなわちフ
オーシンダＩｇＩｓ付位相制御１ｇｌ略（８）により町
ｌ１ａｉＫＪリアクトル（４）にかかる−次ｍ田を第１
図に示す４く制御することによ〕、荷電＠−として町＊
ｎリアクトルを有する＠蒐集膳装置においても逆燻−現
象の発生をＩｇｌ避することが可−となる。Figure 44 shows an example of a charged 1g circuit in a current concentrator according to the present invention. The phase 1IlIl111 circuit with one single circuit, (4) is a saturable reactor, that is, the thyristor (1) is provided with a current output (2) as both arms, and based on the signal of this current detection device (2). A phase control circuit with a forcing circuit is controlled to apply a 7-ohing voltage to the saturable reactor (4), and perform the control. In other words, by phase control 1gl with phasinda IgIs (8), the -order m field applied to the town l1aiKJ reactor (4) is the first
By controlling the four times shown in the figure], as a charge @-, the town *
It is possible to avoid the occurrence of the back-smoking phenomenon even in a @collecting and feeding device having an n reactor.

以上述べた如く、本発明によれば、可飽和リアクトル域
−一路を有する電気集塵装置において、鴫ｓ８リアク、
）ル励磁回路の通常荷電と荷電極性の反転および荷電休
止よりなる荷１ｉＥｖイクルを規則的に−返し行なわせ
る１ｉＩＩ御回路を具備し、ａ記荷電すイクル中の荷１
１ｃ極性の反転を逆電一時定款の範囲内で瞬間的に行な
わせることによｐ集塵装置にかかる出力屯田の印加と休
止を短いＷ４′＠で行なわしめるような構成としたため
、応答の遥い可飽和リアクトル電源回路を有する電気集
塵装置においても電気的な体積ｍ；ｉｉ抵抗率の大きな
粉塵（１・　　　　　１ｍ １０〜１０Ω・（１１１）を含んだｆ８染ガス婚の集塵
を効果的に、しかもすくない１Ｆ４費電力で行なうこと
が出来、省エネルギ政策上極めて大なる効果を有する発
明である。As described above, according to the present invention, in an electrostatic precipitator having a saturable reactor region,
) A 1iII control circuit that regularly returns the charge 1iEv cycles consisting of normal charging, reversal of charge polarity, and charging suspension of the excitation circuit, and
By reversing the 1c polarity instantaneously within the range of the reverse current provisional articles of incorporation, the configuration allows the application and suspension of the output voltage applied to the P dust collector to be performed in a short W4'@, which greatly reduces the response time. Even in an electrostatic precipitator with a saturable reactor power supply circuit, it is possible to effectively collect dust from f8 dye gas containing electrical volume m;ii dust with large resistivity (1.1 m, 10 to 10 Ω.(111)). In addition, this invention can be carried out using only a small amount of electricity per 1F4, and has an extremely large effect in terms of energy saving policy.

ちなみに、１０Ω・国の焼結ダストを含む１００″Ｏの
排ガスな、本発明１１ｖ１．損−装置と従来の電気集ｊ
Ｉ１１ｆＭ置によ如Ｓ塵した場合の比較は下記表のとｇ
シである。By the way, the present invention 11v1. loss device and conventional electrical collector j with 10Ω/100″O exhaust gas containing sintered dust of Japan.
A comparison of the I11fM position and the S dust is shown in the table below.
It is shi.

ダスト濃度（ｑ／ｗ／ｈ　）　　消費電力（ＩｍＷ）従
来　　６０５６０ 本発１１１　　　　　２５　　　　　　　　１５０なお
、この場合、Ｔｏ：１〜２減、Ｔｚ　：　０−２〜０−
４（８）、丁型：　０．１〜０．２ｓｅｃ、Ｔｓ：　Ｑ
−７〜１．４ｍｇとした。Dust concentration (q/w/h) Power consumption (ImW) Conventional 60560 Main power supply 111 25 150 In this case, To: 1 to 2 decrease, Tz: 0-2 to 0-
4(8), Ding type: 0.1~0.2sec, Ts: Q
-7 to 1.4 mg.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る電気集塵装置における可飽和リア
クトルの励磁１田の荷電特性図、第２図は第１図に対応
する励磁電圧の荷電特性図、第６図はＩＮじ（出力１１
ＥＥ特性図、第４図は本発明に係るＳ蒐集塵装置におけ
る荷電回路の一実施例を示す説明図である。 （３）は７オ一シンダ回路付位相制＃回路、（４）は可
ａ相リアクトル。 特許出願人　住友金属工業株式会社 第４図FIG. 1 is a charging characteristic diagram of the excitation voltage of the saturable reactor in the electrostatic precipitator according to the present invention, FIG. 2 is a charging characteristic diagram of the excitation voltage corresponding to FIG. 1, and FIG. 11
The EE characteristic diagram, FIG. 4, is an explanatory diagram showing one embodiment of the charging circuit in the S dust collector according to the present invention. (3) is a phase system # circuit with a 7-o-cinder circuit, and (4) is an a-phase reactor. Patent applicant: Sumitomo Metal Industries, Ltd. Figure 4

Claims (1)

【特許請求の範囲】[Claims] （１）　ｃｉＪ飽和リアクトル１を源回路を有する電気
集塵装置において、前記可飽和りアクトル励磁回路の遁
當方向７ｔ−シング荷菖と荷１ｌＣｆｉ性の反転および
荷電体止よｐ、なる＃電すイクルを規則的に繰返し行な
わせる制御回路を具備し、前記荷電サイクル中の荷電及
荷電休止を逆ＩＩＥ１１１時定歇の範囲内で１１１間的
に行なわせることによシ集ｍ装置にかかる出力′１１１
１１Ｅの印加と休止を短い周期で行わせしめるよう構成
したことを特徴とする電気集塵装置。(1) In an electrostatic precipitator having a source circuit of the ciJ saturation reactor 1, the reversal of the 7t-singing charge and the charge 1lCfi properties of the saturable actuator excitation circuit and the stoppage of the charged body result in #electrical The output applied to the collecting device is provided with a control circuit that repeats the cycle regularly, and performs charging and charging pauses intermittently within the range of the reverse IIE time interval during the charging cycle. '111
An electrostatic precipitator characterized in that it is configured to apply and stop the application of 11E in short cycles.