JP3254134B2 - Electric dust collector - Google Patents
Electric dust collectorInfo
- Publication number
- JP3254134B2 JP3254134B2 JP19034996A JP19034996A JP3254134B2 JP 3254134 B2 JP3254134 B2 JP 3254134B2 JP 19034996 A JP19034996 A JP 19034996A JP 19034996 A JP19034996 A JP 19034996A JP 3254134 B2 JP3254134 B2 JP 3254134B2
- Authority
- JP
- Japan
- Prior art keywords
- ionization
- electrode
- electric field
- discharge electrode
- dust collection
- 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 - Lifetime
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電気集塵装置に関す
る。特に微細な低濃度の粒子状物質を捕集する電気集塵
装置に関する。[0001] The present invention relates to an electric dust collector. In particular, the present invention relates to an electrostatic precipitator that collects fine low-concentration particulate matter.
【０００２】[0002]
【従来の技術】ガスまたは空気中に浮遊する微細な固体
又は液体の粒子状物質（煤塵等）を静電気力を利用して
除去する電気集塵装置（以下、ＥＰと言う）は、各種産
業排気ガスの浄化から家庭の室内空気浄化に至るまで、
従来より幅広く使用され、効果を上げている。2. Description of the Related Art An electrostatic precipitator (hereinafter referred to as EP) for removing fine solid or liquid particulate matter (dust and the like) floating in a gas or air by using electrostatic force is used in various industrial exhaust systems. From gas purification to household indoor air purification,
It is used more widely than before and has been effective.
【０００３】比較的低濃度、例えば数ｍｇ／ｍ3 以下の
濃度の粒子状物質を処理する電気集塵装置は、上流側に
設けられた粒子状物質への主として荷電のみを実施する
電離部と、その下流側に設けられた粒子状物質の捕集の
みを実施する電界部に分割された構成となっており、主
として室内、トンネル内等の空気浄化に使用されてい
る。[0003] relatively low concentrations, for example, an electric dust collector for processing particulate matter of a few mg / m 3 or less of the concentration of the ionizing unit mainly carried charged only to particulate matter disposed upstream It is divided into an electric field part provided only on the downstream side that only collects particulate matter, and is mainly used for air purification in a room, a tunnel or the like.
【０００４】従来のこの種の従来式電気集塵装置（以
下、従来式ＥＰと言う）の概要を図６に示す。図６
（ａ）（ｂ）（ｃ）は、その前面図、側面図、後面図で
ある。FIG. 6 shows an outline of a conventional electric precipitator of this type (hereinafter referred to as a conventional EP). FIG.
(A), (b), and (c) are a front view, a side view, and a rear view.
【０００５】同図に示すように、従来式ＥＰは、上流側
に設けられた電離部０１０と、下流側に設けられた電界
部０１１とから構成されている。電離部０１０において
は、ＥＰケーシング０１の上流部に接地された電離部集
塵電極０２と電離部放電電極としてのワイヤ放電電極０
３′とが交互に設置され、ワイヤ放電電極０３′は支持
碍子０４を介してＥＰケーシング０１に固定されてお
り、荷電用の高圧電源０７によって高電圧が印加されて
いる。As shown in FIG. 1, the conventional EP comprises an ionization section 010 provided on the upstream side and an electric field section 011 provided on the downstream side. In the ionization section 010, the ionization section dust collection electrode 02 and the wire discharge electrode 0 serving as the ionization section discharge electrode are grounded at the upstream portion of the EP casing 01.
3 ′ are alternately arranged, the wire discharge electrode 03 ′ is fixed to the EP casing 01 via the support insulator 04, and a high voltage is applied by a high voltage power supply 07 for charging.
【０００６】電界部０１１においては、ＥＰケーシング
０１内の下流部に接地された電界部集塵電極０８と電界
部放電電極０９とが平行に設置され、放電電極支持金具
０５及び支持碍子０４′を介してＥＰケーシング０１に
固定されている。電界部放電電極０９は、電離部０１０
の荷電用の高圧電源０７とは別の荷電用の高圧電源０
７′により印加されている。In the electric field part 011, an electric field part dust collecting electrode 08 and an electric field part discharge electrode 09, which are grounded at the downstream part in the EP casing 01, are installed in parallel, and a discharge electrode support bracket 05 and a support insulator 04 ′ are connected. It is fixed to the EP casing 01 through the intermediary. The electric field part discharge electrode 09 has an ionization part 010
High-voltage power supply 0 different from charging high-voltage power supply 07
7 '.
【０００７】[0007]
【発明が解決しようとする課題】比較的低濃度（数ｍｇ
／ｍ3 Ｎ以下）の粒子状物質を捕集、処理するのにあた
って、従来式ＥＰには次のような問題点が存在する。A relatively low concentration (several mg)
(/ M 3 N or less) in collecting and treating particulate matter, the conventional EP has the following problems.
【０００８】（１）粒子状物質への荷電を実施する電離
部には、通常、放電電極として細線ワイヤが用いられて
いるが、材質劣化、腐食あるいは火花の発生等によって
断線することが多い。特に均一な放電を行なうためには
ワイヤ径を細かくし、放電極の電界強度を上げる必要が
あるが、細線ほど断線しやすい。[0008] (1) In the ionization section for charging the particulate matter, a thin wire is usually used as a discharge electrode, but the wire is often broken due to deterioration of the material, corrosion or generation of sparks. In particular, in order to perform a uniform discharge, it is necessary to reduce the wire diameter and increase the electric field strength of the discharge electrode.
【０００９】（２）このため、電離部の放電電極ワイヤ
は消耗品として、断線の度に取替えを実施する必要があ
り、そのメンテナンス性より、電離部はＥＰの最上流側
１ケ所のみにしか設けられず、従って、通常、電離部と
電界部の組み合せは１組のみしか構成できず、１基のＥ
Ｐでの性能上の上限が存在する。(2) For this reason, it is necessary to replace the discharge electrode wire of the ionization part as a consumable at every disconnection. Due to its maintainability, the ionization part is provided only at one location on the most upstream side of the EP. Therefore, normally, only one combination of the ionizing part and the electric field part can be formed, and one E
There is an upper bound on performance at P.
【００１０】（３）電離部と電界部は夫々独立に荷電す
べく、２つの独立した高圧電源が必要とされる。(3) Two independent high-voltage power supplies are required to charge the ionization part and the electric field part independently.
【００１１】本発明は上記実情に鑑みなされたもので、
簡単な構造でメンテナンス性の優れた構成とすると共
に、装置のコンパクト化及び製作コストの低減化を図
り、且つ性能を大幅に向上することのできる電気集塵装
置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,
It is an object of the present invention to provide an electric precipitator that has a simple structure and excellent maintainability, and that can reduce the size and production cost of the device and greatly improve the performance.
【００１２】[0012]
【課題を解決するための手段】本発明は、以上のような
問題を解決し、メンテナンス性に優れ、且つ安定した高
性能が達成され、さらに主として低コストの低濃度粒子
状物質捕集用ＥＰを実現するため、以下の手段を講ず
る。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, achieves excellent maintainability, achieves stable high performance, and is mainly a low cost EP for collecting low concentration particulate matter. Take the following measures to achieve
【００１３】従来のワイヤ放電電極では、均一なコロ
ナ放電を得るためにワイヤ線径を細くする必要があった
が、本発明においては、電離部放電電極をその前端また
は前後端にガス流れ方向に向けて突出する多数の鋸刃状
突起を均一に設けた平板状として構成することによっ
て、電離部放電電極の前端または前後端の高さ方向に均
一なコロナ放電を供給することができる。In the conventional wire discharge electrode, it was necessary to reduce the wire diameter in order to obtain a uniform corona discharge. In the present invention, however, the ionization portion discharge electrode is provided at its front end or front and rear end in the gas flow direction. By forming a large number of saw-tooth-shaped protrusions projecting toward the flat plate-like shape, a uniform corona discharge can be supplied in the height direction of the front end or the front and rear ends of the ionization portion discharge electrode.
【００１４】さらに電離部で必要電流を得るための電
圧を電界部で必要な電圧とほぼ同じとなる様に、電離部
放電電極と電離部集塵電極の間隔及び電界部放電電極と
電界部集塵電極の間隔を選定する。ここで、粒子径が１
μｍ以下の微細粒子を対象とした場合、粒子の帯電機構
は、主として、拡散帯電となる。従って、比較的低濃度
の粒子を処理する場合には、空間電荷の影響も小さいこ
とから、電流を多く流すほど粒子の帯電量は増大し、Ｅ
Ｐの捕集効率を上げることが可能となる。Further, the distance between the ionization part discharge electrode and the ionization part dust collection electrode and the electric field part discharge electrode and the electric field part collection electrode are set so that the voltage required to obtain the required current in the ionization part is substantially the same as the voltage required in the electric field part. Select the distance between the dust electrodes. Here, the particle diameter is 1
In the case of targeting fine particles of μm or less, the charging mechanism of the particles is mainly diffusion charging. Therefore, when processing a relatively low concentration of particles, since smaller space charge effects, the charge amount of the more particles allows large current increases, E
It becomes possible to increase the collection efficiency of P.
【００１５】しかし、粒子の帯電量は、電流の対数でし
か増加しないため、必要以上の電流を流すことは、エネ
ルギーのロスとなる上、空気浄化用の集塵機の場合多量
のオゾン発生の要因ともなる。そこで、１台の電源装置
で電離部、電界部を共通荷電し、且つ、電界部での高電
界強度を維持しつつ電離部での電流を、エネルギー効率
の上から最適となる値に抑える方法として、電離部放電
極と電離部集塵極の間隔Ｄを、電界部放電極と電界部集
塵極の間隔ｄと同じにせず、変えることができるように
することが有効である。However, since the amount of charge of the particles increases only by the logarithm of the current, flowing more current than necessary results in loss of energy, and in the case of a dust collector for air purification, a large amount of ozone is generated. Become. Thus, a method of charging the ionization part and the electric field part with a single power supply device and suppressing the current in the ionization part to an optimum value from the viewpoint of energy efficiency while maintaining high electric field strength in the electric field part. It is effective that the distance D between the ionization part discharge electrode and the ionization part dust collection electrode can be changed without being equal to the distance d between the electric field part discharge electrode and the electric field part dust collection electrode.
【００１６】又、本発明はメンテナンス性に優れ、且
つ安定した高性能が達成され、さらに低コストのＥＰを
実現するため以下の手段を講ずる。すなわち、電離部放
電電極と電離部集塵電極の間隔Ｄが電界部放電電極と電
界部集塵電極の間隔ｄの（２ｎ＋１）倍となる様な電極
構成とし｛Ｄ＝（２ｎ＋１）ｄ，但し、ｎは１以上の整
数（１，２，３…）｝、且つ電離部放電電極は、前端に
ガス流れ上流方向に向けて突出する鋸刃状の多数の突起
を設けた平板状とし、電界部放電電極と一体となった１
枚の平板状とすると共に、電離部集塵電極が電界部集塵
電極と一体となった１枚の平板状となる電極構造とし、
単一の高圧電源により荷電する。Further, the present invention takes the following measures in order to achieve excellent maintainability, stable high performance, and low cost EP. That is, the electrode configuration is such that the distance D between the ionization part discharge electrode and the ionization part dust collection electrode is (2n + 1) times the distance d between the electric field part discharge electrode and the electric field part dust collection electrode, and ΔD = (2n + 1) d, where , N is an integer (1, 2, 3,...) Of 1 or more, and the ionization portion discharge electrode is a flat plate having a large number of saw blade-like protrusions protruding toward the gas flow upstream direction at the front end. 1 integrated with the partial discharge electrode
A flat plate-like electrode structure in which the ionization unit dust collection electrode is integrated with the electric field unit dust collection electrode,
Charged by a single high voltage power supply.
【００１７】さらに、本発明は、大幅な集塵性能向上
のために以下の手段を講ずる。上記，の電気集塵装
置をガス流れに沿って直列に複数組配列し、且つこれら
全てを単一の高圧電源により荷電する。Further, the present invention takes the following measures to greatly improve the dust collection performance. A plurality of the above-mentioned electrostatic precipitators are arranged in series along the gas flow, and all of them are charged by a single high-voltage power supply.
【００１８】上記〜の構成手段を講ずる電気集塵
装置において、電離部に取り付ける鋸刃状突起の間隔Ｐ
に対する電離部集塵電極の間隔Ｄの比が１以上１０以下
であり、且つ鋸刃状突起の高さｈが２ｍｍ以上である電
極形状とする。In the electrostatic precipitator which adopts the above constitutions (1) to (4), the interval P between the saw-toothed projections attached to the ionization portion is set.
The ratio of the distance D between the ionization part dust collecting electrode to the electrode is 1 or more and 10 or less, and the height h of the saw-toothed protrusion is 2 mm or more.
【００１９】〔作用〕以上のような手段により構成され
ることにより、以下の作用が得られる。[Operation] The following operations can be obtained by the above means.
【００２０】の手段による作用 (i)電離部放電電極は、その前端または前後端に多数の
鋸刃状突起を設けた平板状であるため、局所的な高電流
部を形成し、従来式ＥＰにおける電離部のワイヤ放電電
極が不要となり、断線のトラブルを廃し、メンテナンス
フリーとすることができる。(I) Since the ionizing portion discharge electrode is a flat plate having a large number of saw blade-shaped protrusions at its front end or front and rear ends, a local high current portion is formed and a conventional EP electrode is formed. In this case, the wire discharge electrode of the ionization part is unnecessary, and the trouble of disconnection can be eliminated, and the maintenance can be made free.
【００２１】(ii)電離部放電電極において、多数の鋸刃
状突起が局部的に高い電界を形成するため、安定したコ
ロナ放電を生じるスポットとなり、同放電電極がダスト
等により汚れた場合にも、従来式ＥＰのワイヤ放電電極
と比べて、均一な放電を維持することが出来る。(Ii) Since a large number of saw-tooth-shaped projections locally form a high electric field in the ionization portion discharge electrode, a stable corona discharge is generated. In addition, a uniform discharge can be maintained as compared with the conventional EP wire discharge electrode.
【００２２】の手段による作用 従来式ＥＰの場合、電離部と電界部に独立して夫々高圧
電源が必要であったが、本発明では、電離部の電極間隔
と電界部の電極間隔を変えることにより、単一の高圧電
源で有効に荷電できる。すなわち、高圧電源装置はＥＰ
１基当り最低１台にて運転が可能である。In the case of the conventional type EP, a high-voltage power source is required independently for the ionizing section and the electric field section. However, in the present invention, the electrode spacing of the ionizing section and the electrode spacing of the electric field section are changed. Thereby, charging can be effectively performed with a single high-voltage power supply. That is, the high-voltage power supply is EP
Operation is possible with at least one unit per unit.
【００２３】の手段による作用 (i)電離部放電電極が電界部放電電極と一体となり、電
離部集塵電極が電界部集塵電極と一体となること及び電
離部放電電極と電離部集塵電極の間隔Ｄを電界部放電電
極と電界部集塵電極の間隔ｄの（２ｎ＋１）倍にするこ
とにより、電流を低くすることで消費電力の低減が図
れ、メンテナンス性に優れ、且つ安定した高性能が達成
され、さらに製作コストの低減化が図れる。 (ii)電離部放電電極が電界部放電電極と一体となってい
るため、単一の高圧電源により荷電できる上、高電圧供
給ラインも１系列でよい。(I) The ionization part discharge electrode is integrated with the electric field part discharge electrode, the ionization part dust collection electrode is integrated with the electric field part collection electrode, and the ionization part discharge electrode and the ionization part dust collection electrode are integrated. Is set to (2n + 1) times the distance d between the electric field part discharge electrode and the electric field part dust collection electrode, the power consumption can be reduced by reducing the current, and the maintenance performance is excellent and the stable high performance is achieved. Is achieved, and the production cost can be further reduced. (ii) Since the ionization part discharge electrode is integrated with the electric field part discharge electrode, it can be charged by a single high voltage power supply, and the high voltage supply line may be one line.
【００２４】の手段による作用 (i)ガス流れに沿って直列に複数組の電離部と電界部を
組み合わせた構成のユニットを交互に配置することによ
り、１段当りに求められる負荷が低減されるので、従来
式ＥＰのように性能上の上限が存在せず、ガス流速が高
くなっても容易に対応できる。 (ii)複数組の電離部及び電界部全てを単一の高圧電源に
より荷電するため、大幅な電源コストの低減となる。(I) By arranging units having a combination of a plurality of sets of ionizing sections and electric field sections alternately in series along the gas flow, the load required per stage can be reduced. Therefore, unlike the conventional EP, there is no upper limit in performance, and it is possible to easily cope with a high gas flow rate. (ii) Since a plurality of sets of the ionization section and the electric field section are all charged by a single high-voltage power supply, the power supply cost is greatly reduced.
【００２５】の手段による作用 (i)図５（ａ）に電離部に取り付ける鋸刃状突起の間隔
と電流の関係を示す。鋸刃状突起の間隔Ｐに対する電離
部放電電極と電離部集塵電極の間隔Ｄの比Ｄ／Ｐが１よ
り小さくなるとコロナ放電の広がり以上に鋸刃状突起の
間隔Ｐが大きくなり、ガス流直角方向の断面で電離部で
も電圧の流れない、すなわち粒子状物質への十分な荷電
を行えないデッドゾーンが増大するため集塵性能が低下
する。(I) FIG. 5 (a) shows the relationship between the interval between the sawtooth-shaped projections attached to the ionization section and the current. When the ratio D / P of the interval D between the ionized portion discharge electrode and the ionized portion dust collecting electrode to the interval P between the saw-toothed protrusions is smaller than 1, the interval P between the saw-toothed protrusions becomes larger than the spread of the corona discharge, and the gas flow In the cross section in the perpendicular direction, no voltage flows even in the ionized portion, that is, the dead zone in which the particulate matter cannot be sufficiently charged is increased, so that the dust collecting performance is reduced.
【００２６】一方、Ｄ／Ｐが１０より大きくなると隣接
電極どおしによる放電のチョークにより、粒子状物質へ
の十分な荷電を行えないデッドゾーンが増大するため集
塵性能が低下する。したがって、Ｄ／Ｐを１以上１０以
下とすること、言い換えると、ＰをＤ／１０以上Ｄ以下
とすることにより、粒子状物質への十分な荷電を行なう
と共にデッドゾーンが少なくなる。On the other hand, if the D / P is larger than 10, the discharge choke caused by the adjacent electrodes increases the dead zone in which the particulate matter cannot be sufficiently charged, so that the dust collecting performance is reduced. Therefore, by setting D / P to 1 or more and 10 or less, in other words, by setting P to D / 10 or more and D or less, the particulate matter is sufficiently charged and the dead zone is reduced.
【００２７】(ii)図５（ｂ）に電離部に取り付ける鋸刃
状突起の突起高さｈと電流密度の関係を示す。鋸刃状突
起の突起高さｈが５ｍｍ以上の場合、均一なコロナ放電
が得られ、粒子状物質への十分な荷電を行なうと共にデ
ッドゾーンはほとんどなくなる。しかし、突起高さｈが
５ｍｍより短くなると、不均一なコロナ放電となり粒子
状物質への十分な荷電を行えないデッドゾーンが出来は
じめ、突起高さｈが２ｍｍより短くなるとデッドゾーン
が極めて大きくなるため集塵性能は大きく低下する。(Ii) FIG. 5B shows the relationship between the height h of the saw-toothed projection attached to the ionization part and the current density. When the projection height h of the saw-tooth-shaped projection is 5 mm or more, a uniform corona discharge is obtained, the particulate matter is sufficiently charged, and the dead zone is almost eliminated. However, when the projection height h is shorter than 5 mm, a non-uniform corona discharge occurs and a dead zone in which the particulate matter cannot be sufficiently charged starts to be formed. When the projection height h is shorter than 2 mm, the dead zone becomes extremely large. Therefore, dust collection performance is greatly reduced.
【００２８】以上から、電離部に取り付ける鋸刃状突起
の間隔ＰをＤ／１０以上Ｄ以下とし、且つ鋸刃状突起の
高さｈを２ｍｍ以上とすることにより、均一なコロナ放
電が得られ、粒子状物質への十分な荷電を行なうと共に
デッドゾーンがほとんどなくなる結果、高い集塵性能を
発揮できる。From the above, a uniform corona discharge can be obtained by setting the interval P between the saw-toothed projections attached to the ionizing portion to D / 10 to D and the height h of the sawtooth-shaped projections to 2 mm or more. As a result, the particulate matter is sufficiently charged and the dead zone is almost eliminated, so that high dust collection performance can be exhibited.
【００２９】[0029]
【実施例】以下、図面に示す実施例を参照して、本発明
を詳細に説明する。 〔実施例１〕本発明の第１の実施例の要部を図１に示
す。図１（ａ）（ｂ）（ｃ）は、本実施例に係る二段式
電気集塵装置の前面図、側面図、上面図である。同図に
示すように、この電気集塵装置は、上流側に設けられ主
として電荷を与える電離部１０と、その下流側に設けら
れ主として集塵を行なう電界部１１とにより構成されて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. [Embodiment 1] FIG. 1 shows a main part of a first embodiment of the present invention. 1A, 1B, and 1C are a front view, a side view, and a top view of the two-stage electric precipitator according to the present embodiment. As shown in FIG. 1, the electric dust collector includes an ionization unit 10 provided mainly on the upstream side and mainly providing electric charges, and an electric field unit 11 provided downstream thereof mainly on dust collection.
【００３０】電離部１０においては、ＥＰケーシング１
内の上流部に接地された電離部集塵電極２と、電離部放
電電極３とが平行に設置され（本実施例では３通路）、
放電電極支持金具５及び支持碍子４を介してＥＰケーシ
ング１に固定されている。In the ionization section 10, the EP casing 1
The ionization part dust collection electrode 2 and the ionization part discharge electrode 3 that are grounded at the upstream part of the inside are installed in parallel (three passages in this embodiment),
It is fixed to the EP casing 1 via a discharge electrode support 5 and a support insulator 4.
【００３１】放電電極支持金具５は、集塵電極貫通穴６
に於いて集塵電極とは電気的に絶縁された上で貫通して
おり、３枚の電離部放電電極３には単一の高圧電源７に
よって正または負の高電圧が印加されている。電界部１
１においては、ＥＰケーシング１内の下流部に接地され
た電界部集塵電極８と電界部放電電極９が平行に設置さ
れ（本実施例では６通路）、放電電極支持金具５及び支
持碍子４を介してＥＰケーシング１に固定されている。The discharge electrode support 5 is provided with a dust collecting electrode through hole 6.
In this case, the electrode is electrically insulated from the dust collecting electrode and penetrates therethrough, and a single high voltage power supply 7 applies a positive or negative high voltage to the three ionization portion discharge electrodes 3. Electric field part 1
1, an electric field part dust collecting electrode 8 and an electric field part discharge electrode 9, which are grounded at a downstream portion in the EP casing 1, are installed in parallel (six passages in this embodiment), and a discharge electrode support bracket 5 and a support insulator 4 are provided. And is fixed to the EP casing 1 through the.
【００３２】電界部放電電極９には単一の高圧電源７に
よって正または負の高電圧が印加されている。従って電
離部１０と電界部１１には同じ電圧が印加される。本実
施例では、電離部放電電極３は、その前端にガス流れ方
向に向けて突出する多数の鋸刃状突起１２を設けた平板
状となっている。A positive or negative high voltage is applied to the electric field portion discharge electrode 9 by a single high voltage power supply 7. Therefore, the same voltage is applied to the ionization part 10 and the electric field part 11. In the present embodiment, the ionization part discharge electrode 3 has a flat plate shape provided with a large number of saw blade-like projections 12 protruding in the gas flow direction at the front end thereof.
【００３３】即ち、電離部放電電極３には、その前端に
鋸刃状突起部１２が高さ方向に均一な分布で多数設けら
れており、この鋸刃状突起部１２の先端には電気力線が
集中して、局所的にコロナ放電が生じ易く、コロナ電流
の流れやすい局所の高電流部を形成する。That is, the ionizing portion discharge electrode 3 is provided with a large number of saw blade-like protrusions 12 at the front end thereof with a uniform distribution in the height direction. The lines are concentrated to form a local high current portion where corona discharge easily occurs and a corona current easily flows.
【００３４】ここで、「鋸刃状」とは、図示するものに
限らず、局所の突起部１ケ所当りの電流密度を調整すべ
く、より鋭利な突起形状にしたり、突起先端を丸くした
ものでも良い。更には、同等のコロナ放電が得られる針
状突起物やトゲ状突起物を設けたものも含まれる。ま
た、鋸刃状突起部１２の形状や高さ方向の間隔は、電離
部１０の電極間隔に応じて、変更することも可能であ
り、集塵すべき粒子状物質の特性等の条件に応じて最適
な形状，間隔を選定することができる。Here, the term “saw blade” is not limited to the one shown in the figure, but may be a sharper projection or a rounded tip in order to adjust the current density per local projection. But it is good. In addition, those provided with needle-like projections or barb-like projections that can provide equivalent corona discharge are also included. Further, the shape of the saw blade-shaped protrusion 12 and the interval in the height direction can be changed according to the electrode interval of the ionization unit 10, and can be changed according to conditions such as characteristics of the particulate matter to be collected. The optimum shape and interval can be selected.
【００３５】〔実施例２〕本発明の第２の実施例の要部
を図２に示す。図２（ａ）（ｂ）（ｃ）は、本実施例に
係る二段式電気集塵装置の前面図、側面図、上面図であ
る。本実施例では、電離部放電電極３は、その前端及び
後端にガス流れ方向に向けて突出する多数の鋸刃状突起
１２を設けた平板状となったものであり、その他の構成
は、前述した実施例と同様である。[Second Embodiment] FIG. 2 shows a main part of a second embodiment of the present invention. 2A, 2B, and 2C are a front view, a side view, and a top view of the two-stage electric precipitator according to the present embodiment. In this embodiment, the ionization part discharge electrode 3 is a flat plate having a large number of saw blade-like projections 12 protruding toward the gas flow direction at its front end and rear end. This is the same as the embodiment described above.
【００３６】従って、前述した実施例と同様に、鋸刃状
突起部１２の先端には電気力線が集中して、局所的にコ
ロナ放電が生じ易く、コロナ電流の流れやすい局所の高
電流部を形成するという効果を奏する。尚、この鋸歯状
突起部１２は、前述した実施例と同様に、図示する形状
に限るものではなく、また、他の条件に応じて、その間
隔、高さ等を適宜選定することができるものである。Therefore, similarly to the above-described embodiment, the lines of electric force are concentrated on the tip of the saw-tooth-shaped projection 12, and corona discharge is easily generated locally, so that the corona current easily flows in the local high current portion. Is formed. It should be noted that the saw-tooth projection 12 is not limited to the illustrated shape, as in the above-described embodiment, and the interval, height and the like can be appropriately selected according to other conditions. It is.
【００３７】〔実施例３〕本発明の第３の実施例の要部
を図３に示す。図３（ａ）（ｂ）（ｃ）は、本実施例に
係る二段式電気集塵装置の前面図、側面図、上面図であ
る。同図に示すように、電離部１０の電極間隔Ｄを電界
部１１の電極間隔ｄの（２ｎ＋１）倍（本実施例では３
倍）となる構成とし、電離部放電電極３と電界部放電電
極９とが一体となり、電離部集塵電極２と電界部集塵電
極８とが一体となったものである。Embodiment 3 FIG. 3 shows a main part of a third embodiment of the present invention. FIGS. 3A, 3 </ b> B, and 3 </ b> C are a front view, a side view, and a top view of the two-stage electric precipitator according to the present embodiment. As shown in the drawing, the electrode interval D of the ionization unit 10 is (2n + 1) times the electrode interval d of the electric field unit 11 (3 in this embodiment).
The ionization part discharge electrode 3 and the electric field part discharge electrode 9 are integrated, and the ionization part dust collection electrode 2 and the electric field part dust collection electrode 8 are integrated.
【００３８】尚、電界部１１だけの放電電極９及び集塵
電極８も設置されている。また、本実施例では、一部の
電界部放電電極９と一体となった電離部放電電極３側に
高電圧配線を接続しているが、電界部放電極側のみ、あ
るいはそれぞれに高電圧配線を接続しても差しつかえな
い。It should be noted that a discharge electrode 9 and a dust collecting electrode 8 only for the electric field portion 11 are provided. In this embodiment, the high voltage wiring is connected to the ionization part discharge electrode 3 integrated with a part of the electric field part discharge electrode 9. Can be connected.
【００３９】〔実施例４〕本発明の第４の実施例の要部
を図４に示す。本実施例は、図３に示す電気集塵装置を
ガス流れに沿って直列に２組配列し、これら全てを単一
の高圧電源７により荷電する構成としている。[Embodiment 4] FIG. 4 shows a main part of a fourth embodiment of the present invention. In this embodiment, two sets of the electrostatic precipitators shown in FIG. 3 are arranged in series along the gas flow, and all of them are charged by a single high-voltage power supply 7.
【００４０】また、第３、第４の実施例では、電離部放
電電極３の前端のみに鋸刃状突起１２を設けているが、
第２の実施例と同様に、電離部放電電極３と一体となっ
た電界部放電電極９の後端にも鋸刃状突起１２を設ける
ことも当然可能であることはいうまでもない。In the third and fourth embodiments, the saw blade-like projections 12 are provided only at the front end of the ionizing portion discharge electrode 3.
As in the second embodiment, it goes without saying that a saw-toothed projection 12 can also be provided at the rear end of the electric field part discharge electrode 9 integrated with the ionization part discharge electrode 3.
【００４１】[0041]
【発明の効果】以上、実施例に基づいて具体的に説明し
たように、本発明によれば、以下の特徴を持つ、ガスま
たは空気中に含まれる比較的低濃度の粒子状物質捕集用
電気集塵装置が実現できる。As described above in detail with reference to the embodiments, according to the present invention, a method for collecting relatively low-concentration particulate matter contained in gas or air having the following features. An electric dust collector can be realized.
【００４２】（１）電離部放電電極は、断線等のトラブ
ルの心配がなくメンテナンスフリーである。 （２）ダスト等の付着による汚れに強い電離部放電電極
である。 （３）ＥＰ１基当り最低１台の高圧電源装置にてＥＰ運
転が可能である。 （４）電離部放電電極及び集塵電極を電界部放電電極及
び集塵電極と一体化すること及び電離部放電電極と電離
部集塵電極の間隔Ｄを、電界部放電電極と電界部集塵電
極の間隔ｄの（２ｎ＋１）倍にすることにより、メンテ
ナンス性に優れ、安定した高性能が達成され、さらに製
作コストが低減する。 （５）ガス流れに沿って直列に複数組の上記電気集塵装
置を配列することにより、ガス流速が高くなっても容易
に対応できる。 （６）電離部に取り付ける鋸刃状突起の間隔ＰをＤ／１
０以上Ｄ以下とし、且つ鋸刃状突起の高さｈを２ｍｍ以
上とすることにより、均一なコロナ放電が得られ、高い
集塵性能を発揮できる。(1) The ionization part discharge electrode is maintenance-free without any fear of trouble such as disconnection. (2) It is an ionization part discharge electrode that is resistant to dirt due to adhesion of dust and the like. (3) EP operation is possible with at least one high-voltage power supply per EP. (4) integrating the ionization part discharge electrode and the dust collection electrode with the electric field part discharge electrode and the dust collection electrode, and setting the distance D between the ionization part discharge electrode and the ionization part dust collection electrode to the electric field part discharge electrode and the electric field part dust collection; By setting the distance d between the electrodes to be (2n + 1) times, excellent maintainability, stable high performance is achieved, and the manufacturing cost is further reduced. (5) By arranging a plurality of sets of the electrostatic precipitators in series along the gas flow, it is possible to easily cope with a high gas flow rate. (6) The interval P between the saw-toothed protrusions attached to the ionization part is D / 1.
By setting the height h of the saw-toothed protrusions to 0 mm or more and 2 mm or more, uniform corona discharge can be obtained, and high dust collection performance can be exhibited.
【図１】本発明の第１の実施例に係る電気集塵装置の構
成説明図である。FIG. 1 is an explanatory diagram of a configuration of an electric precipitator according to a first embodiment of the present invention.
【図２】本発明の第２の実施例に係る電気集塵装置の構
成説明図である。FIG. 2 is a configuration explanatory view of an electric dust collector according to a second embodiment of the present invention.
【図３】本発明の第３の実施例に係る電気集塵装置の構
成説明図である。FIG. 3 is an explanatory diagram illustrating a configuration of an electric precipitator according to a third embodiment of the present invention.
【図４】本発明の第４の実施例に係る電気集塵装置の構
成説明図である。FIG. 4 is a configuration explanatory view of an electric precipitator according to a fourth embodiment of the present invention.
【図５】Ｄ／Ｐと電流との関係及び鋸歯状突起部の高さ
ｈと電流密度の関係を示すグラフである。FIG. 5 is a graph showing the relationship between D / P and current, and the relationship between the height h of the sawtooth-shaped protrusion and the current density.
【図６】従来式ＥＰの概要を示す図である。FIG. 6 is a diagram showing an outline of a conventional EP.
１ ＥＰケーシング ２ 電離部集塵装置 ３ 電離部放電電極 ４ 支持碍子 ５ 放電電極支持金具 ６ 集塵電極貫通穴 ７ 高圧電源 ８ 電界部集塵電極 ９ 電界部放電電極 １０ 電離部 １１ 電界部 １２ 鋸刃状突起部 ０３′ ワイヤ放電電極 DESCRIPTION OF SYMBOLS 1 EP casing 2 Ionization part dust collection device 3 Ionization part discharge electrode 4 Support insulator 5 Discharge electrode support bracket 6 Dust collection electrode through hole 7 High voltage power supply 8 Electric field part dust collection electrode 9 Electric field part discharge electrode 10 Ionization part 11 Electric field part 12 Saw Edge projection 03 'Wire discharge electrode
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川西 好光 兵庫県神戸市兵庫区和田崎町一丁目１番 １号 三菱重工業株式会社 神戸造船所 内 (72)発明者 上田 泰稔 兵庫県神戸市兵庫区和田崎町一丁目１番 １号 三菱重工業株式会社 神戸造船所 内 (56)参考文献 特開 平６−165949（ＪＰ，Ａ) 特開 平６−142548（ＪＰ，Ａ) 特開 昭64−3398（ＪＰ，Ａ) 特開 昭62−136256（ＪＰ，Ａ) 実開 昭61−29855（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B03C 3/00 - 3/88 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshimitsu Kawanishi 1-1-1, Wadazakicho, Hyogo-ku, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Yasutoshi Ueda Hyogo, Kobe-shi, Hyogo 1-1-1, Wadasaki-cho, Ward Kobe Shipyard, Mitsubishi Heavy Industries, Ltd. (56) References JP-A-6-165949 (JP, A) JP-A-6-142548 (JP, A) JP-A 64-64 3398 (JP, A) JP-A-62-136256 (JP, A) JP-A-61-29855 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B03C 3/00-3 / 88
Claims (2)
て集塵を行なう電界部とにより構成される二段式電気集
塵装置において、流入するガス流れに沿って設置される
電離部集塵電極に対面して設けられる電離部放電電極
を、前端または前後端にガス流れ方向に向けて突出する
多数の鋸刃状突起を均一に設けた平板状とし、上記各突
起からコロナ放電を発生し、且つ電離部放電電極と電離
部集塵電極の間隔を、電界部放電電極と電界部集塵電極
の間隔より大きくした電気集塵装置において、前記電離
部に取り付ける鋸刃状突起の間隔に対する電離部集塵電
極の間隔の比が１以上１０以下であり、且つ鋸刃状突起
の高さｈが２ｍｍ以上であることを特徴とする電気集塵
装置。In a two-stage electrostatic precipitator comprising an ionizing section for mainly providing electric charges and an electric field for mainly collecting dust, an ionizing section dust collecting electrode provided along an inflowing gas flow. The ionization unit discharge electrode provided facing the front plate or a flat plate having a large number of saw blade-like protrusions uniformly projecting toward the gas flow direction at the front end or the front and rear ends, generating corona discharge from each of the protrusions, and the spacing of the ionizing unit discharge electrode and ionization unit dust collecting electrode, the electrostatic precipitator is made larger than the interval of the field unit discharge electrodes and the field unit dust collecting electrode, the ionization
Of the ionization part to the distance between the serrated protrusions attached to the part
The ratio of the pole spacing is 1 or more and 10 or less, and the saw-tooth protrusion
The height h of the electric dust collector is 2 mm or more .
流れ上流方向に向けて突出する多数の鋸刃状突起を均一
に設けた平板状とし、電離部放電電極と電離部集塵電極
の間隔を電界部放電電極と電界部集塵電極の間隔の３以
上の奇数倍とし、且つ電離部放電電極及び電離部集塵電
極は一部の電界部放電電極及び電界部集塵電極とそれぞ
れ一体となった平板として構成したことを特徴とする請
求項１記載の電気集塵装置。2. The ionization part discharge electrode is formed in a flat plate shape in which a large number of saw blade-like projections projecting toward a gas flow upstream direction are uniformly provided at a front end thereof, and the ionization part discharge electrode and the ionization part dust collection electrode are formed. The interval is an odd multiple of 3 or more of the interval between the electric field part discharge electrode and the electric field part dust collection electrode, and the ionization part discharge electrode and the ionization part dust collection electrode are respectively integrated with some electric field part discharge electrodes and electric field part dust collection electrodes. The electrostatic precipitator according to claim 1, wherein the electric precipitator is configured as a flat plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19034996A JP3254134B2 (en) | 1996-07-19 | 1996-07-19 | Electric dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19034996A JP3254134B2 (en) | 1996-07-19 | 1996-07-19 | Electric dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1028897A JPH1028897A (en) | 1998-02-03 |
| JP3254134B2 true JP3254134B2 (en) | 2002-02-04 |
Family
ID=16256725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19034996A Expired - Lifetime JP3254134B2 (en) | 1996-07-19 | 1996-07-19 | Electric dust collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3254134B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3661364B2 (en) * | 1997-08-21 | 2005-06-15 | 富士電機システムズ株式会社 | Electric dust collector |
| JP2000197833A (en) * | 1999-01-08 | 2000-07-18 | Sumitomo Heavy Ind Ltd | Electric dust collector for tunnel |
| EP1721678B1 (en) * | 2004-03-03 | 2013-05-01 | Zesu Giko Co., Ltd. | Electrostatic dust precipitator |
| JP2006150242A (en) * | 2004-11-30 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Air purification apparatus and air purifying method using it |
| JP4744520B2 (en) * | 2005-06-13 | 2011-08-10 | 株式会社是須技工 | Electric dust collector |
| JP2008119599A (en) * | 2006-11-13 | 2008-05-29 | Matsushita Electric Ind Co Ltd | Electric precipitator |
| JP2013124556A (en) * | 2011-12-13 | 2013-06-24 | Denso Corp | Exhaust gas treatment device for internal combustion engine |
| EP2908064B1 (en) * | 2014-02-18 | 2020-02-12 | Blueair AB | Air purifier device with ionizing means |
| CN104549744A (en) * | 2014-12-23 | 2015-04-29 | 大连兆和科技发展有限公司 | Electrostatic core and using method thereof |
| CN105195318A (en) * | 2015-11-12 | 2015-12-30 | 解标 | Two-dimensional anode dust collection electric precipitator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62136256A (en) * | 1985-12-09 | 1987-06-19 | Matsushita Seiko Co Ltd | Electrostatic precipitator |
| JPH0682000B2 (en) * | 1987-06-26 | 1994-10-19 | 株式会社日立製作所 | Oil leak prevention device for rotating electric machine |
| JPH06142548A (en) * | 1992-11-10 | 1994-05-24 | Matsushita Seiko Co Ltd | Wet-type electric dust collector |
| JPH06165949A (en) * | 1992-11-30 | 1994-06-14 | Matsushita Electric Ind Co Ltd | Electrostatic precipitator |
-
1996
- 1996-07-19 JP JP19034996A patent/JP3254134B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1028897A (en) | 1998-02-03 |
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