JP3202338B2 - Duct type electrostatic precipitator - Google Patents
Duct type electrostatic precipitatorInfo
- Publication number
- JP3202338B2 JP3202338B2 JP19235692A JP19235692A JP3202338B2 JP 3202338 B2 JP3202338 B2 JP 3202338B2 JP 19235692 A JP19235692 A JP 19235692A JP 19235692 A JP19235692 A JP 19235692A JP 3202338 B2 JP3202338 B2 JP 3202338B2
- Authority
- JP
- Japan
- Prior art keywords
- duct
- dust collecting
- electrostatic precipitator
- type electrostatic
- electrode
- 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]
【産業上の利用分野】この発明は、反応処理を行う反応
塔に設けられる電気集じん装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator provided in a reaction tower for performing a reaction treatment.
【０００２】[0002]
【従来の技術】ボイラにおいて重油や石炭等の燃料を燃
焼させると、燃料中の硫黄分が酸化して「ＳＯx （ＳＯ
2 およびＳＯ3 ）が発生し、そのうちのＳＯ2 ガスにつ
いては、排煙脱硫装置におけるガスの冷却過程に於いて
液化し、極めて微細なＳＯ3 ミスト（硫酸ミスト）にな
るため、排煙脱硫装置においてはほとんど除去されない
ので、そのまま吸収塔の煙突から外気に排出されると紫
煙となってたなびく。2. Description of the Related Art When a fuel such as heavy oil or coal is burned in a boiler, the sulfur content in the fuel is oxidized to "SOx (SOx)
2 and SO 3 ), of which SO 2 gas is liquefied in the process of cooling the gas in the flue gas desulfurization device and becomes an extremely fine SO 3 mist (sulfuric acid mist). Is almost not removed, and when it is discharged into the open air from the chimney of the absorption tower, it turns into purple smoke.
【０００３】近年、排煙脱硫装置の普及に伴って、ＳＯ
x 総量の規制値は満足される場合は多いが、ＳＯ3 ミス
トによる紫煙が「目視公害」として、新たに世人の関心
を高めていることは周知の通りである。[0003] In recent years, with the spread of flue gas desulfurization equipment, SO
x Although the regulation value of the total amount is often satisfied, it is well known that purple smoke caused by SO3 mist is newly increasing public interest as "visual pollution".
【０００４】この紫煙を目視不可の状態にまで消去する
には、煙突の入口におけるばいじん濃度を、微細なＳＯ
3 ミストを含めて「１０mg/m3 Ｎ」もしくはそれ以下の
非常に低いレベルに抑える必要があり、その目的のため
に、煙道の上流側に円筒状の湿式電気集じん装置を設け
ることが行われている。従来、こうした湿式電気集じん
装置には、図３に示されるような構造が採用されてい
る。[0004] In order to eliminate this purple smoke so that it is not visible, the concentration of the dust at the entrance of the chimney is reduced by a fine SO
3 It is necessary to keep the level to a very low level of 10 mg / m 3 N or less, including mist. For that purpose, it is necessary to install a cylindrical wet-type dust collector upstream of the flue. Is being done. Conventionally, a structure as shown in FIG. 3 has been adopted for such a wet type electrostatic precipitator.
【０００５】この湿式電気集じん装置１について説明す
れば、１は煙道ガスダクト２の垂直部分に設けた円筒型
の本体である。本体１は、一対のテ−パダクト３，３を
介して、煙道ガスダクト２より大ききな外形となる、円
筒形のダクト４を設けて構成される。そして、本体１に
て、煙道ガスダクト２を流れる「１０〜１５ｍ／ｓ」と
いった煙道ガスＡ（処理ガス）のガス流速を、所定のガ
ス流速、例えば「２ｍ／ｓ程度」になるようにしてい
る。本体１は、上側が入口で、下側が出口となってい
て、上下方向に沿って煙道ガスＡが流通するようになっ
ている。このダクト２内には、各々の内面を集じん極と
した複数の小ダクト、小ダクトの各中心に設けた棒状の
放電極５で構成される集じん部６が設けられている。こ
れら放電極５は、集じん極の上方および下方に配置した
支持梁７，７に取付金具８を介して固定されている。[0005] The wet type electrostatic precipitator 1 will be described. Reference numeral 1 denotes a cylindrical main body provided at a vertical portion of a flue gas duct 2. The main body 1 is provided with a cylindrical duct 4 having a larger outer shape than the flue gas duct 2 via a pair of tape ducts 3 and 3. In the main body 1, the gas flow rate of the flue gas A (processing gas) such as "10 to 15 m / s" flowing through the flue gas duct 2 is set to a predetermined gas flow rate, for example, "about 2 m / s". ing. The main body 1 has an inlet on the upper side and an outlet on the lower side, and the flue gas A flows along the vertical direction. Inside the duct 2, there are provided a plurality of small ducts each having an inner surface as a dust collecting pole, and a dust collecting portion 6 composed of a rod-shaped discharge electrode 5 provided at the center of each of the small ducts. These discharge electrodes 5 are fixed to support beams 7, 7 disposed above and below the dust collecting electrode via mounting brackets 8.
【０００６】この支持梁７、７が、支持碍子９を介し
て、ダクト４の外側に設けた碍子室１０から荷電管１１
により吊り下げられ、支持梁７をダクト４や集じん極と
電気的に絶縁してある。[0006] The support beams 7, 7 are transferred via a support insulator 9 from an insulator chamber 10 provided outside the duct 4 to a charge tube 11.
The support beam 7 is electrically insulated from the duct 4 and the dust collecting electrode.
【０００７】こうした絶縁支持構造には、上下の各支持
梁７，７の位置と対応するダクト４の周壁部に接続ダク
ト１２（口体に相当）を連通接続し、この接続ダクト１
２の先端部に上記碍子室１０を設け、この接続ダクト１
２内に上記支持梁７の端部を挿入し、上記碍子室１０か
ら接続ダクト１０に向って延びる荷電管１１で、接続ダ
クト１２の内面から離間するよう、支持梁７の端部を吊
持して、接続ダクト１２と支持梁７との間に絶縁空間１
３を形成している（絶縁支持する手段）。なお、１４は
入口側のテ−パダクト３内に、ガス流に対して横断する
方向に並設された複数、例えば３枚の整流板（多孔板よ
りなる）である。In such an insulating support structure, a connection duct 12 (corresponding to a mouth) is connected to the peripheral wall of the duct 4 corresponding to the position of each of the upper and lower support beams 7, 7.
2 is provided at the front end thereof, and the connecting duct 1 is provided.
The end of the support beam 7 is inserted into the inside 2, and the end of the support beam 7 is suspended by a charging tube 11 extending from the insulator chamber 10 toward the connection duct 10 so as to be separated from the inner surface of the connection duct 12. Then, the insulating space 1 is provided between the connection duct 12 and the support beam 7.
3 (means for insulating and supporting). Reference numeral 14 denotes a plurality of, for example, three rectifying plates (made of perforated plates) arranged in the taper duct 3 on the inlet side in a direction transverse to the gas flow.
【０００８】そして、荷電管１１には、貫通碍子１５を
介して、碍子室１０の外部に設置した高圧電源供給装置
１６が接続されていて、高圧電源供給装置１６から貫通
碍子１５を経て荷電管１１に高電圧を印加することによ
り、集じん極と放電極とからなる電極空間を高電界にす
るとともに、同電極空間に大きなコロナ電流を供給し
て、ダクト４内を流れる煙道ガス中に含まれるダストや
ミストを集じんするようしている。A high-voltage power supply 16 installed outside the insulator chamber 10 is connected to the charge tube 11 via a penetrating insulator 15. The high-voltage power supply 16 passes through the penetrating insulator 15 to charge the tube. By applying a high voltage to the electrode 11, the electrode space consisting of the dust collecting electrode and the discharge electrode is made to have a high electric field, and at the same time, a large corona current is supplied to the electrode space so that the flue gas flowing in the duct 4 Dust and mist contained are collected.
【０００９】また集じん部６の上方には、下向きに噴射
方向を定めた噴霧ノズル１７ａが付いた洗浄液ライン１
７が設けられていて、集じん極へ常時又は間欠的に洗浄
液を供給することができるようにしている。これによ
り、集じん極上に集められたダストやミストを下方へ洗
い流すようにしてある。Above the dust collecting section 6, a washing liquid line 1 having a spray nozzle 17a having a downwardly directed spraying direction is provided.
7 is provided so that the cleaning liquid can be supplied to the dust collecting electrode constantly or intermittently. As a result, dust and mist collected on the very top of the dust collection are washed down.
【００１０】集じん極の下方には、ホッパ（図示しな
い）が設けられていて、洗い流したダクト、ミストを洗
浄液を排液として、系外に排出した後、排水処理設備へ
導かれるようにしてある。[0010] A hopper (not shown) is provided below the dust collecting electrode, and the duct and the mist that have been washed out are discharged out of the system with the cleaning liquid as a drain, and then guided to a waste water treatment facility. is there.
【００１１】こうした湿式電気集じん装置において、洗
浄液の噴霧により集じん極を洗浄したとき、煙道ガスＡ
中に含まれるキャリオ−バミストや噴霧洗浄水の一部
は、集じん部６の上方のダクト部分の内面に付着し、壁
に沿って流下する。In such a wet type electrostatic precipitator, when the dust collecting electrode is cleaned by spraying a cleaning liquid, the flue gas A
A portion of the carrier mist and spray cleaning water contained therein adheres to the inner surface of the duct portion above the dust collecting portion 6 and flows down along the wall.
【００１２】ところで、接続ダクト１２が取付けられて
いる箇所では、壁に開口部が生じているため、この開口
部の上方より流下してきた液滴ないし液膜は、同開口部
分において一度、壁より剥がれ、液滴となって開口空間
を自由落下しようとする。By the way, since an opening is formed in the wall at the place where the connection duct 12 is attached, the droplet or liquid film flowing down from above the opening is once discharged from the wall at the opening. It peels off and tries to fall freely in the open space as droplets.
【００１３】ところが、この接続ダクト１２の開口部に
は放電極５の支持梁７が通っているために、落下した液
滴の一部は支持梁７上で結合成長して、再び飛散する。
すると、その際、成長して粒径が大きくなった液滴のさ
らに一部は、接続ダクト１２のダクト接続部近傍に落下
し、さらに接続ダクト１２の下側の内面部分に落下した
大粒径の液滴が、再び飛散して大粒径のままで、外側に
至る、すなわちダクト４の周壁近傍の小ダクトに導かれ
てしまうことがある。However, since the support beam 7 of the discharge electrode 5 passes through the opening of the connection duct 12, a part of the dropped liquid drops grows on the support beam 7 and scatters again.
Then, at this time, a part of the droplets having grown and increased in particle diameter fell near the duct connection portion of the connection duct 12, and further dropped on the inner surface portion below the connection duct 12. Droplets may be scattered again and reach the outside with a large particle diameter, that is, guided to a small duct near the peripheral wall of the duct 4.
【００１４】このようなことが生じると、この部分の小
ダクトにおいて火花頻発現象を起こして、所定の電流お
よび電圧を保持できなくなり、湿式電気集じん装置にお
いて性能劣化が生じてしまう。If this occurs, a spark frequently occurs in the small duct in this portion, so that a predetermined current and voltage cannot be maintained, and the performance of the wet electrostatic precipitator deteriorates.
【００１５】この火花頻発現象によるダクト型の湿式電
気集じん装置の性能劣化を防ぐためには、接続ダクト１
２の下側の内面部分から小ダクトへ向う、大粒径の液滴
の直接な再飛散を無くすことが必要となる。In order to prevent the performance of the duct-type wet electrostatic precipitator from deteriorating due to the frequent occurrence of sparks, the connection duct 1
It is necessary to eliminate the direct re-dispersion of large-sized droplets from the lower inner surface part 2 to the small duct.
【００１６】その対策として、従来では、図３に示され
るようにダクト側の取付部となる接続ダクト４の基部を
拡大管部分とし、この拡大管部分の下側の内面部分に傾
斜部１８を形成して、小ダクト側へ導かれることなく、
再びダクト４の内面に沿って液が流れるようにしてい
た。Conventionally, as a countermeasure, as shown in FIG. 3, the base of the connection duct 4 serving as a mounting portion on the duct side is an enlarged pipe portion, and an inclined portion 18 is provided on the lower inner surface portion of the enlarged pipe portion. Forming, without being guided to the small duct side,
The liquid was allowed to flow along the inner surface of the duct 4 again.
【００１７】[0017]
【発明が解決しようとする課題】ところが、こうした傾
斜部１８を設ける構造は、接続ダクト１２を拡大する分
だけ、接続ダクト１２のダクト４に対する取付スペ−ス
が大きくなり、接続ダクト１２内を通る支持梁７の位置
が集じん部６に対して離れる傾向にある。このため、放
電極５の長さが、その分、長くなり、放電極９の両端の
固定位置が離れてしまうこととなる。However, in such a structure in which the inclined portion 18 is provided, the mounting space of the connection duct 12 with respect to the duct 4 is increased by an amount corresponding to the enlargement of the connection duct 12, and the connection duct 12 passes through the inside of the connection duct 12. The position of the support beam 7 tends to be away from the dust collecting portion 6. For this reason, the length of the discharge electrode 5 becomes longer by that amount, and the fixed positions at both ends of the discharge electrode 9 are separated.
【００１８】小空間化（ナロウスペイシング）および電
極の取付精度が要求されるダクト型の湿式電気集じん装
置において、こうした放電極９のスパンＳが広がること
は、製作の困難性が増すので、結果的に集じん部６の短
縮、すなわち集じん電極の限界長さの短縮を余儀なくさ
れたり、性能劣化を招く原因となっている。In a duct-type wet electrostatic precipitator which requires a small space (narrow spacing) and an electrode mounting accuracy, the widening of the span S of the discharge electrode 9 increases the difficulty of manufacturing. As a result, the dust collecting portion 6 must be shortened, that is, the limit length of the dust collecting electrode must be shortened, and the performance is deteriorated.
【００１９】この発明は、このような事情に着目してな
されたもので、その目的とするところは、放電極の両端
の固定位置を最短にしつつ、口体の内面部分から集じん
部へ向う液滴の飛散を防ぐことができるダクト型電気集
じん装置を提供することにある。The present invention has been made in view of such circumstances, and an object of the present invention is to move from the inner surface of the mouth to the dust collecting portion while minimizing the fixed positions of both ends of the discharge electrode. An object of the present invention is to provide a duct-type electrostatic precipitator capable of preventing droplets from scattering.
【００２０】[0020]
【課題を解決するための手段】上記目的を達成するため
に請求項１に記載のダクト型電気集じん装置は、放電極
を支持する支持梁が通る口体のうち、少なくとも集じん
部の上方の支持梁が挿入される口体の内面に、同口体の
内面へ落下する液滴の飛散を防ぐ多孔質の液滴飛散防止
体を設けた。According to a first aspect of the present invention, there is provided a duct-type electrostatic precipitator, wherein at least a portion above a dust collecting portion of a mouth through which a supporting beam supporting a discharge electrode passes. Is provided on the inner surface of the body into which the supporting beam is inserted, to prevent the droplets falling onto the inner surface of the body from scattering.
【００２１】請求項２に記載のダクト型電気集じん装置
によると、十分な液滴の飛散防止効果を得るために、多
孔質の液滴飛散防止体は、複数枚の金網を重ねて構成さ
れるものとした。According to the second aspect of the present invention, in order to obtain a sufficient effect of preventing the droplets from scattering, the porous droplet scattering prevention member is formed by stacking a plurality of wire nets. It was assumed.
【００２２】[0022]
【作用】請求項１に記載のダクト型電気集じん装置によ
ると、口体の開口空間を落下する大粒径の液滴は、口体
の下側の内面部分に至る際、多孔質の液滴飛散防止体に
衝突して、同多孔質中に液分が吸収される。すると、同
部分から、さらに大粒径の液滴として集じん部へには再
飛散しなくなり、吸収された液が液滴飛散防止体からダ
クトの内面を流下することになる。これにより、口体の
基部を極力、集じん部に近付けて取付けつつ、集じん部
における火花頻発現象が抑制されることになる。請求項
２に記載のダクト型電気集じん装置によると、実験の結
果、請求項１で述べた作用が十分に確認された。According to the duct type electrostatic precipitator according to the first aspect, when the large-diameter droplets falling in the opening space of the mouth body reach the lower inner surface portion of the mouth body, the liquid is a porous liquid. The liquid collides with the droplet scattering prevention body and the liquid is absorbed in the porous material. As a result, the droplet is not scattered again from the same portion to the dust collecting portion as a droplet having a larger particle size, and the absorbed liquid flows down the inner surface of the duct from the droplet scattering prevention member. Thereby, while the base of the mouth body is attached as close as possible to the dust collecting portion, the spark frequent phenomenon in the dust collecting portion is suppressed. According to the duct type electrostatic precipitator according to the second aspect, as a result of the experiment, the operation described in the first aspect was sufficiently confirmed.
【００２３】[0023]
【実施例】以下、この発明を図１および図２に示す一実
施例にもとづいて説明する。なお、図面において、先の
「従来の技術」の項で述べた電気集じん装置と同じ部分
には同一符号を付してその説明を省略し、この項では異
なる部位（発明の要部）について説明することにする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIGS. In the drawings, the same parts as those of the electrostatic precipitator described in the section of "Prior Art" are denoted by the same reference numerals, and description thereof will be omitted. In this section, different parts (main parts of the invention) will be described. I will explain.
【００２４】すなわち、本実施例によると、煙道ガスダ
クト２は、高速のガス流速（例えば４〜１０ｍ／ｓ、本
実施例では８ｍ／ｓで流れるようにしてある）で、煙道
ガスＡが流れるような大型の断面四角形（矩形又は正四
角形）のダクトを用いている。That is, according to the present embodiment, the flue gas duct 2 flows through the flue gas A at a high gas flow rate (for example, at a flow rate of 4 to 10 m / s, in this embodiment, 8 m / s). A large, flowing duct with a rectangular cross section (rectangular or square) is used.
【００２５】この煙道ガスダクト１に取付けたダクト型
の湿式電気集じん装置（以下、ＥＰと称す）２０の本体
となるダクト２１には、煙道ガスダクト２の外形と同
じ、大型の断面四角形（矩形又は正四角形）のダクトが
用いられている。またダクト２１内に設けた集じん部６
には、つぎのような構造が用いられている。A duct 21 serving as a main body of a duct-type wet electrostatic precipitator (hereinafter referred to as EP) 20 attached to the flue gas duct 1 has a large rectangular section (the same as the outer shape of the flue gas duct 2). (Rectangular or square) ducts are used. The dust collecting portion 6 provided in the duct 21
Has the following structure.
【００２６】すなわち、ダクト２１の内部には、同ダク
ト２１の横断面を仕切ってなる複数の小ダクト２２が形
成されていて、小ダクト２２の各々の内面を集じん極２
２ａとしている。またこれら小ダクト２２の各中心に
は、棒状の放電極５が挿通されている。これら放電極５
が、従来の電気集じん装置と同様、支持梁７、取付金具
８、支持碍子９、碍子室１０、荷電管１１、接続ダクト
１２などを用いて、吊り下げられている。そして、集じ
ん部６内を、煙道ガスダクト２を流れるガス流速と同様
の高速流で、煙道ガスＡを流せるようにしてある。That is, a plurality of small ducts 22 are formed inside the duct 21 so as to partition the cross section of the duct 21, and the inner surface of each small duct 22 is collected by the dust collecting electrode 2.
2a. A rod-shaped discharge electrode 5 is inserted through each center of the small ducts 22. These discharge electrodes 5
However, like the conventional electric precipitator, it is suspended using a support beam 7, a mounting bracket 8, a support insulator 9, an insulator chamber 10, a charging tube 11, a connection duct 12, and the like. The flue gas A is allowed to flow in the dust collecting section 6 at a high flow rate similar to the gas flow rate flowing through the flue gas duct 2.
【００２７】また集じん部６の上側および下側にある各
接続ダクト１２は、いずれも拡大部のない円筒形をなし
ている。そして、これら各接続ダクト１２の基端（ダク
ト２１に取付けられる端部分）の下側内面部分には、い
ずれも液滴飛散防止体２３が設けられている。詳しく
は、接続ダクト１２の開口上縁から落下する液滴を受け
る位置となる内面部分に多孔質の液滴飛散防止体２３が
設けられている。Each of the connection ducts 12 above and below the dust collecting portion 6 has a cylindrical shape without an enlarged portion. In addition, a droplet scattering prevention member 23 is provided on the lower inner surface portion of the base end (the end portion attached to the duct 21) of each of the connection ducts 12. More specifically, a porous droplet scattering prevention body 23 is provided on an inner surface portion where a droplet falling from the upper edge of the opening of the connection duct 12 is received.
【００２８】この多孔質の液滴飛散防止体２３には、煙
道ガスＡの腐食性に応じた材質からなるものとして、例
えば複数枚の金網を重ねて構成された偏平物、具体的に
は線径が「０．１２mm」の平織１００メッシュのステン
レス製金網を複数枚、例えば２枚、重ねたものが用いら
れている。むろん、液滴飛散防止体２３は、その表面
と、高電圧が印加される支持梁７との間に絶縁空間１３
が確保されてさえいれば、材質的には導電性、非導電性
を問わない。The porous droplet scattering preventive body 23 is made of a material corresponding to the corrosiveness of the flue gas A, for example, a flat object formed by stacking a plurality of wire nets, specifically, A stack of a plurality of, for example, two, stainless steel meshes of 100 mesh plain weave with a wire diameter of “0.12 mm” is used. Needless to say, the droplet scattering prevention body 23 is provided between the surface thereof and the support beam 7 to which the high voltage is applied.
The material may be conductive or non-conductive as long as it is ensured.
【００２９】このように構成されたダクト型電気集じん
装置によると、接続ダクト１２の開口空間を落下する大
粒径の液滴は、接続ダクト１２の下側の内面部分に至る
際、多孔質の液滴飛散防止体２３と衝突して、同多孔質
中に液分が吸収される。According to the duct type electrostatic precipitator configured as described above, the droplets having a large particle diameter falling in the opening space of the connection duct 12 become porous when reaching the lower inner surface portion of the connection duct 12. Collides with the droplet scattering prevention body 23, and the liquid is absorbed in the porous material.
【００３０】これにより、同部分から、さらに大粒径の
液滴として集じん部６、すなわちダクト２１の近傍の小
ダクト２２へには再飛散しなくなる。そして、吸収され
た液が液滴飛散防止体２３からダクト２１の内面を流下
することとなる。As a result, the droplet is not scattered again from the same portion to the dust collecting portion 6, that is, the small duct 22 near the duct 21, as a droplet having a larger particle diameter. Then, the absorbed liquid flows down the inner surface of the duct 21 from the droplet scattering prevention body 23.
【００３１】それ故、小ダクト２２における火花頻発現
象を抑制することができ、同火花頻発現象を原因とした
ダクト型の湿式電気集じん装置２０の性能劣化を防止す
ることができる。Therefore, the spark frequent phenomenon in the small duct 22 can be suppressed, and the performance deterioration of the duct type wet electrostatic precipitator 20 due to the spark frequent phenomenon can be prevented.
【００３２】実験によれば、集じん部６の上方の接続ダ
クト１２のみに上記構造の液滴飛散防止体２３を設けた
ダクト型の湿式電気集じん装置と、液滴飛散防止体２３
が無いダクト型の湿式電気集じん装置との電流電圧特性
を調べた結果、図２中の符号Ｘで示される液滴飛散防止
体が無いときの特性曲線と、同符号Ｙで示される液滴飛
散防止体が有るときの特性曲線とからわかるように、
「Ｘ」は火花が頻発して十分な電流が流れていないのに
対して、「Ｙ」は「Ｘ」に比べて多大なコロナ電流が確
保されており、液滴飛散防止体２３の効果が顕著、かつ
十分にあることが確認された。According to the experiment, a wet electric dust collecting apparatus of the duct type in which the droplet scattering preventive body 23 having the above-described structure is provided only in the connection duct 12 above the dust collecting section 6;
As a result of examining current-voltage characteristics with a duct-type wet electrostatic precipitator having no liquid droplets, a characteristic curve when there is no droplet scattering prevention member shown by reference symbol X in FIG. As can be seen from the characteristic curve when there is a shatterproof body,
“X” has a large amount of corona current as compared with “X”, whereas “X” has a large amount of corona current as compared with “X”, whereas sparks occur frequently. It was confirmed that it was remarkable and sufficient.
【００３３】しかも、こうしたことに加え、従来の接続
ダクトの基端の取付部のような拡大した部分（傾斜部を
含む）がないので、接続ダクト１２の基部を極力、集じ
ん部６に近付けて取付けることができ、放電極５の両端
の固定位置、すなわち放電極５のスパンＳを最短とする
ことができ、スパンＳが広がることによる障害を是正す
ることができる。In addition to the above, since there is no enlarged portion (including the inclined portion) such as a mounting portion at the base end of the conventional connection duct, the base of the connection duct 12 is brought as close as possible to the dust collecting portion 6. The fixed position at both ends of the discharge electrode 5, that is, the span S of the discharge electrode 5 can be minimized, and an obstacle due to the spread of the span S can be corrected.
【００３４】なお、上述した一実施例では、複数枚の金
網を重ねた液滴飛散防止体を用いたが、例えば多孔質の
セラミックス、樹脂，ステンレスウ−ルを重ねたものな
どでもよく、液滴飛散防止体の構造には限定されるもの
ではない。In the above-described embodiment, the droplet scattering preventive body in which a plurality of wire meshes are stacked is used. However, for example, a porous ceramic, resin, stainless steel wool or the like may be used. The structure of the droplet scattering prevention member is not limited.
【００３５】また上述した一実施例では、液滴飛散防止
体を集じん部の上方および下方の両方の接続ダクトに取
付けた例を挙げたが、これに限らず、集じん部の上方の
接続ダクトのみに液滴飛散防止体を設けてもよい。すな
わち、これは落下する液滴の小ダクトヘの再飛散を防止
するには、上方の接続ダクトへの液滴飛散防止体の設置
が重要であるからであり、上方の接続ダクトのみ液滴飛
散防止体を設置して、下方の接続ダクトへの設置を省略
しても、同様の効果を奏する。Further, in the above-described embodiment, an example has been described in which the droplet scattering preventing members are attached to both the connection ducts above and below the dust collecting portion. However, the present invention is not limited to this. The droplet scattering prevention member may be provided only in the duct. That is, in order to prevent the falling droplets from re-scattering into the small duct, it is important to install a droplet scattering prevention body in the upper connection duct, and only the upper connection duct prevents droplet scattering. The same effect can be obtained even when the body is installed and installation in the lower connection duct is omitted.
【００３６】[0036]
【発明の効果】以上説明したように請求項１および請求
項２に記載の発明によれば、放電極の両端の固定位置、
すなわち放電極のスパンを最短にしつつ、口体から集じ
ん部への液滴再飛散を防止することができる。それ故、
火花頻発現象による性能劣化がもたされることのないダ
クト型電気集じん装置を実現することができる。As described above, according to the first and second aspects of the present invention, the fixed positions of both ends of the discharge electrode,
That is, it is possible to prevent the droplets from re-scattering from the mouth to the dust collecting portion while minimizing the span of the discharge electrode. Therefore,
A duct-type electrostatic precipitator that does not suffer from performance deterioration due to spark frequent occurrence can be realized.
【図１】この発明の一実施例のダクト型の湿式電気集じ
ん装置を示す断面図。FIG. 1 is a sectional view showing a duct-type wet-type electrostatic precipitator according to an embodiment of the present invention.
【図２】接続ダクトに液滴飛散防止体が有るときと、無
いときにおけるダクト型の湿式電気集じん装置の電流電
圧特性を対比して示す線図。FIG. 2 is a diagram comparing current-voltage characteristics of a duct-type wet electrostatic precipitator with and without a droplet scattering preventive body in a connection duct.
【図３】従来の湿式電気集じん装置を示す断面図。FIG. 3 is a cross-sectional view showing a conventional wet-type electrostatic precipitator.
４…ダクト、５…放電極、６…集じん部、７…支持梁、
８…取付金具、９…支持碍子、１０…碍子室、１１…荷
電管、１２…接続ダクト（口体）、１７ａ…噴霧ノズ
ル、１７…洗浄液ライン、２２…小ダクト、２２ａ…集
じん極、２３…液滴飛散防止体。4 duct, 5 discharge electrode, 6 dust collecting part, 7 support beam,
8 mounting bracket, 9 support insulator, 10 insulator chamber, 11 charging tube, 12 connection duct (mouth), 17a spray nozzle, 17 cleaning liquid line, 22 small duct, 22a dust collecting electrode, 23: Droplet scattering prevention body.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 片山 博幸 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 丸本 明比古 兵庫県高砂市荒井町新浜２丁目８番25号 高菱エンジニアリング株式会社内 (58)調査した分野(Int.Cl.7，ＤＢ名) B03C 3/00 - 3/88 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Katayama 2-1-1, Shinhama, Arai-machi, Takasago-shi, Hyogo Pref. Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. No. 25 Takaishi Engineering Co., Ltd. (58) Field surveyed (Int.Cl. 7 , DB name) B03C 3/00-3/88
Claims (2)
ダクトと、 このダクト内にガス流通方向に沿って内面を集じん極と
した複数の小ダクトを形成するとともにこれら小ダクト
の各中心に棒状の放電極を挿通して構成される集じん部
と、 この集じん部の上方および下方に前記ダクトを横断する
方向に沿って設けられた、前記放電極を支持する支持梁
と、 この支持梁の位置に対応して前記ダクトの周壁部に設け
られた、前記支持梁の端部が挿入された口体と、 前記支持梁の端部を前記口体の内面から離した状態で前
記ダクトに絶縁支持する手段と、 前記集じん部の上方に設けられ、前記集じん部に対する
洗浄液の噴霧によって前記集じん極を洗浄する噴霧手段
と、 前記口体のうち、少なくとも前記集じん部の上方の支持
梁が挿入する口体の内面に設けられた、同口体の内面へ
落下する液滴の飛散を防ぐ多孔質の液滴飛散防止体とを
具備したことを特徴とするダクト型電気集じん装置。1. A duct having a gas flow direction defined in a vertical direction, and a dust collecting electrode having an inner surface in the duct along the gas flow direction.
A plurality of small ducts
A dust collecting portion formed by inserting a rod-shaped discharge electrode at the center of each; and a support beam provided above and below the dust collection portion along a direction crossing the duct, and supporting the discharge electrode. If, provided in a peripheral wall portion of the duct corresponding to the position of the support beam, said an end portion inserted mouth of support beams, releases the ends of the support beams from the inner surface of the inlet body A means for insulatingly supporting the duct in a state, a spraying means provided above the dust collecting part, and washing the dust collecting electrode by spraying a cleaning liquid on the dust collecting part; And a porous droplet scattering prevention member provided on the inner surface of the mouth body into which the supporting beam above the dust portion is inserted, which prevents the droplets falling onto the inner surface of the mouth body from scattering. Duct type electrostatic precipitator.
の金網を重ねて構成されることを特徴とする請求項１に
記載のダクト型電気集じん装置。2. The duct type electrostatic precipitator according to claim 1, wherein the porous droplet scatter prevention body is configured by stacking a plurality of wire nets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19235692A JP3202338B2 (en) | 1992-07-20 | 1992-07-20 | Duct type electrostatic precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19235692A JP3202338B2 (en) | 1992-07-20 | 1992-07-20 | Duct type electrostatic precipitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0631203A JPH0631203A (en) | 1994-02-08 |
| JP3202338B2 true JP3202338B2 (en) | 2001-08-27 |
Family
ID=16289921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19235692A Expired - Fee Related JP3202338B2 (en) | 1992-07-20 | 1992-07-20 | Duct type electrostatic precipitator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3202338B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5056499B2 (en) * | 2008-03-11 | 2012-10-24 | ダイキン工業株式会社 | Air treatment equipment |
| KR102254739B1 (en) * | 2019-08-06 | 2021-05-24 | 주식회사 엔아이티코리아 | Dust collector including plate type collecting electrode |
-
1992
- 1992-07-20 JP JP19235692A patent/JP3202338B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631203A (en) | 1994-02-08 |
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