JPH0631204A - Electric precipitator - Google Patents
Electric precipitatorInfo
- Publication number
- JPH0631204A JPH0631204A JP19248292A JP19248292A JPH0631204A JP H0631204 A JPH0631204 A JP H0631204A JP 19248292 A JP19248292 A JP 19248292A JP 19248292 A JP19248292 A JP 19248292A JP H0631204 A JPH0631204 A JP H0631204A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- dust collecting
- electrostatic precipitator
- flue gas
- stage
- 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
Landscapes
- Electrostatic Separation (AREA)
Abstract
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 carrying out a reaction process.
【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 and "SOx (SOx (SO
2 and SO 3 ) are generated, of which SO 2 gas is liquefied during the gas cooling process in the flue gas desulfurization device and becomes extremely fine SO 3 mist (sulfuric acid mist). At that time, it is hardly removed, and when it is directly discharged from the chimney of the absorption tower to the outside air, it flutters 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。With the recent spread of flue gas desulfurization equipment, SO
x Although the regulation value of the total amount is often satisfied, it is well known that the purple smoke caused by SO3 mist is a “visual pollution” and is attracting new public attention.
【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
には、電気集じん装置を設ける。具体的には、従来、図
５に示されるように排煙脱硫装置の吸収塔１につながる
煙道ガスダクト２の上流側に、吸収塔１と隣接して、湿
式電気集じん装置（以下、ＥＰ）３を垂設することが行
われている。このＥＰ３には、図５および図６に示され
るような構造が採用されている。In order to eliminate this purple smoke to a state where it cannot be visually observed, the dust concentration at the entrance of the chimney is adjusted to a fine SO.
3 It is necessary to control to a very low level of “10 mg / m 3 N” or less including mist, and for that purpose, an electrostatic precipitator will be installed. Specifically, as shown in FIG. 5, conventionally, a wet electrostatic precipitator (hereinafter, referred to as EP) is provided on the upstream side of a flue gas duct 2 connected to an absorption tower 1 of a flue gas desulfurization device, adjacent to the absorption tower 1. ) 3 is installed vertically. The EP3 has a structure as shown in FIGS. 5 and 6.
【０００５】すなわち、煙道ガスダクト２の垂直下降部
分２ａには、本体１０が設けられている。本体１０は、
垂直下降部分２ａの途中に、一対のテ−パダクト４，４
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５を設けて構成されている。そして、本
体１０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。なお、６は煙道ガスダクト２のコ−ナ部に設
けたガイドべ−ン、７は入口側のテ−パダクト４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。That is, the main body 10 is provided in the vertically descending portion 2a of the flue gas duct 2. The main body 10 is
In the middle of the vertically descending portion 2a, a pair of taper ducts 4, 4
Through the flue gas duct 2 to a larger external shape,
It is configured by providing a cylindrical duct 5. Then, in the main body 10, "10 to 15 m flowing through the flue gas duct 2"
The gas flow velocity of the flue gas A (process gas) such as "/ s"
A predetermined gas flow velocity, for example, "about 2 m / s" is set. In addition, 6 is a guide vane provided at a corner portion of the flue gas duct 2, 7 is a taper duct 4 on the inlet side,
It is a plurality of, for example, three straightening vanes (comprising a perforated plate) arranged side by side in a direction transverse to the gas flow.
【０００６】ダクト５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９で構成される集じん部１０ａが設けられてい
る。これら放電極９は、集じん極の上方および下方に配
置した支持梁１１，１１に取付金具１２を介して固定さ
れている。また支持梁１１、１１は、支持碍子１３を介
して、ダクト５の外側に設けた碍子室１４から荷電管１
５により吊り下げられている。これにて、支持梁１１を
ダクト５や集じん極と電気的に絶縁してある。なお、碍
子室１４は接続ダクト１６によってダクト５に固定して
あり、この接続ダクト１６の内部に上記支持梁１１を挿
通させて、接続ダクト１６と支持梁１１との間に絶縁空
間１７を形成している。Inside the duct 5, there are provided a plurality of small ducts each having an inner surface as a dust collecting pole, and a dust collecting portion 10a composed of a rod-shaped discharge electrode 9 provided at each center of the small ducts. These discharge electrodes 9 are fixed to the support beams 11 and 11 arranged above and below the dust collecting electrode via mounting fittings 12. In addition, the support beams 11 and 11 are connected via the support insulator 13 from the insulator chamber 14 provided outside the duct 5 to the charging tube 1.
It is suspended by 5. Thus, the support beam 11 is electrically insulated from the duct 5 and the dust collecting electrode. The insulator chamber 14 is fixed to the duct 5 by a connecting duct 16, and the supporting beam 11 is inserted into the connecting duct 16 to form an insulating space 17 between the connecting duct 16 and the supporting beam 11. is doing.
【０００７】荷電管１５には、貫通碍子１８を介して、
碍子室１４の外部に設置した高圧電源供給装置１９が接
続されていて、高圧電源供給装置１９から貫通碍子１８
を経て荷電管１５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
５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。The charging tube 15 is provided with a penetrating insulator 18
A high-voltage power supply device 19 installed outside the insulator chamber 14 is connected, and the high-voltage power supply device 19 is connected to the penetrating insulator 18.
By applying a high voltage to the charging tube 15 via the electric field, the electrode space consisting of the dust collecting electrode and the discharge electrode is made to have a high electric field, and a large corona current is supplied to the electrode space, so that the smoke flowing in the duct 5 Dust and mist contained in the road gas are collected.
【０００８】また集じん極の上方には、下向きに噴射方
向を定めた噴霧ノズル１３ａが付いた洗浄液ライン１４
ａ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。また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、洗い流したダス
ト、ミストを洗浄液を排液として、系外に排出された
後、排水処理設備に導かれるようにしてある。Further, above the dust collecting electrode, a cleaning liquid line 14 having a spray nozzle 13a having a downward spraying direction.
a is provided so that the cleaning liquid can be constantly or intermittently supplied to the dust collecting electrode. As a result, the dust and mist collected at the top of the dust collection are washed down. A hopper (not shown) is provided below the dust collecting electrode so that the washed dust and mist are discharged to the outside of the system by using the cleaning liquid as drainage and then guided to the wastewater treatment facility. .
【０００９】[0009]
【発明が解決しようとする課題】ところが、このような
煙道ガスダクト２の外形より大きな外形を採用した湿式
電気集じん装置は、ダクト内での圧力上昇損失が発生す
る。このため、処理ガスを送る送気ファンを、この損失
分、大型のものに使用しなければならないものであっ
た。However, in a wet electrostatic precipitator having an outer shape larger than that of the flue gas duct 2, a pressure rise loss occurs in the duct. For this reason, it was necessary to use an air-blowing fan for feeding the processing gas to a large-sized one due to this loss.
【００１０】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、ダクト内の圧
力上昇損失を発生させずにすむことが可能な電気集じん
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 thereof is to provide an electrostatic precipitator capable of avoiding a pressure increase loss in a duct. Especially.
【００１１】[0011]
【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に記載の電気集じん装置は、反応塔から湿式
集じん装置までを連通するダクトの有効断面積と、湿式
電気集じん装置の有効断面積とを同一にしたことにあ
る。In order to achieve the above object, an electrostatic precipitator according to claim 1 has an effective cross-sectional area of a duct communicating from a reaction tower to a wet precipitator and a wet electrostatic precipitator. The effective area of the device is the same.
【００１２】請求項２に記載の湿式電気集じん装置によ
ると、設置面積を増加させずに、高効率の集じん性能を
維持するために、請求項１の電気集じん装置を、ダクト
の上流部に２段の集じん部を有し、１段目の集じん部は
ダクトの垂直上昇部分内に有し、２段目の集じん部はダ
クトの垂直下降部分内に有したものとした。According to the wet electrostatic precipitator of claim 2, the electrostatic precipitator of claim 1 is provided upstream of the duct in order to maintain the highly efficient dust collecting performance without increasing the installation area. The second part has a dust collecting part, the first part has a dust collecting part in the vertically rising part of the duct, and the second part has a dust collecting part in the vertically descending part of the duct. .
【００１３】[0013]
【作用】請求項１に記載の電気集じん装置によると、反
応塔と湿式電気集じん装置との有効断面積は同じなの
で、圧力上昇損失の発生する原因となる部分がなくなる
こととなる。According to the electrostatic precipitator according to the first aspect of the present invention, since the reaction tower and the wet electrostatic precipitator have the same effective cross-sectional area, there is no portion that causes a pressure rise loss.
【００１４】請求項２に記載の電気集じん装置による
と、２段の集じん部により、高い集じん性能が得られ
る。しかも、１段目は垂直上昇部分にあり、２段目は垂
直下降部分にあるので、大きな据付面積を必要とせず
に、２段の集じん部をもつ湿式電気集じん装置を設置さ
れることになる。According to the electrostatic precipitator of the second aspect, high dust collecting performance can be obtained by the two-stage dust collecting section. Moreover, since the first stage is in the vertically rising part and the second stage is in the vertically descending part, a wet electrostatic precipitator with two stages of dust collecting part can be installed without requiring a large installation area. become.
【００１５】[0015]
【実施例】以下、この発明を図１ないし図３に示す第１
の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 A first embodiment of the present invention shown in FIGS.
A description will be given based on the embodiment. In the drawings,
The same parts as those of the electrostatic precipitator described in the section "Prior Art" above are denoted by the same reference numerals, and the description thereof will be omitted. In this section, different parts (main parts of the invention) will be described. .
【００１６】すなわち、本実施例によると、煙道ガスダ
クト１は、同ダクトを吸収塔１の入口の冷却塔２０の煙
道ガスＡのガス流速（例えば１０〜１５ｍ／ｓ）の２倍
以上となるような大型の断面四角形のダクトを用いてい
る。ここでは、吸収塔１につながる立上りダクト１ａ、
このダクト１ａにつながる水平ダクト１ｂ、このダクト
１ｂにつながり、上記立上りダクト１ａとは「１８０
℃」反転して隣接配置される垂直ダクト１ｃを組み合わ
せた煙道ガスダクト１が用いられる（例えば流速が８ｍ
／ｓとなるにしてある）。また図１の（ａ）に示される
ようにこのダクト１ａ〜１ｃは、平面から見たとき、側
方へ延びるダクト幅が、吸収塔１の外形に対して、収ま
るような断面四角形にしてある。That is, according to the present embodiment, the flue gas duct 1 has a duct having a flow rate of the flue gas A of the cooling tower 20 at the inlet of the absorption tower 1 which is at least twice as high as the gas flow rate (for example, 10 to 15 m / s). A large duct with a rectangular cross section is used. Here, the rising duct 1a connected to the absorption tower 1,
The horizontal duct 1b connected to this duct 1a, and the rising duct 1a connected to this duct 1b are "180
A flue gas duct 1 is used in which vertical ducts 1c that are inverted and adjacent to each other are combined (for example, a flow velocity is 8 m).
/ S). Further, as shown in FIG. 1A, the ducts 1a to 1c have a quadrangular cross section such that the duct width extending laterally when viewed from above fits the outer shape of the absorption tower 1. .
【００１７】この煙道ガスダクト１の上流部には、ダク
ト型の湿式電気集じん装置（以下、ＥＰと称す）２１が
設けられている。ＥＰ２１は、２段の集じん部２１ａ，
２１ｂを有して構成される。そして、煙道ガスダクト１
の垂直上昇部となる立上りダクト１ａの一部、詳しくは
吸収塔１の直上部分に、このうちの１段目の集じん部２
１ａが設けられ、煙道ガスダクト１の垂直下降部となる
垂直ダクト１ｃの一部に、２段目の集じん部２１ｂが設
けられている。集じん部２１ａおよび集じん部２１ｂに
は、いずれも独立した複数の集じん要素２４を組み合わ
せてなる構造が用いられている。A duct type wet electrostatic precipitator (hereinafter referred to as EP) 21 is provided at an upstream portion of the flue gas duct 1. EP21 is a two-stage dust collecting part 21a,
21b. And the flue gas duct 1
A part of the rising duct 1a that serves as a vertical rising part of the above, more specifically, a part immediately above the absorption tower 1, and the dust collecting part 2 of the first stage
1a is provided, and a part of the vertical duct 1c which is a vertically descending part of the flue gas duct 1 is provided with a second-stage dust collecting section 21b. The dust collecting section 21a and the dust collecting section 21b each have a structure in which a plurality of independent dust collecting elements 24 are combined.
【００１８】具体的には、図３にも示されるように集じ
ん要素２４は、矩形（あるいは正四角形）のダクト２５
を有している。このダクト２５には、同ダクト２５の横
断面を仕切ってなる複数の小ダクト８が形成されてい
て、小ダクト８の各々の内面を集じん極８ａとしてい
る。またこれら小ダクト８の各中心には、棒状の放電極
９が挿通されている。これら放電極９が、従来の電気集
じん装置と同様、支持梁１１、取付金具１２、支持碍子
１３、碍子室１４、荷電管１５などを用いて、吊り下げ
られている。Specifically, as shown in FIG. 3, the dust collecting element 24 has a rectangular (or square) duct 25.
have. The duct 25 has a plurality of small ducts 8 formed by partitioning the cross section of the duct 25, and the inner surface of each of the small ducts 8 serves as a dust collecting electrode 8a. A rod-shaped discharge electrode 9 is inserted through each center of these small ducts 8. Similar to the conventional electrostatic precipitator, these discharge electrodes 9 are suspended by using a support beam 11, a mounting member 12, a support insulator 13, an insulator chamber 14, a charging tube 15, and the like.
【００１９】そして、各集じん装置２１ａ，２１ｂの全
体は、この集じん要素２４を複数、例えば３台、ガス流
とは直角方向に並設して構成される。むろん、集じん部
２１ａおよび集じん部２１ｂの各小ダクト８の配列は同
一となる。The entire dust collecting devices 21a and 21b are constructed by arranging a plurality of dust collecting elements 24, for example, three, in parallel with each other in a direction perpendicular to the gas flow. Of course, the arrangement of the small ducts 8 of the dust collecting portion 21a and the dust collecting portion 21b is the same.
【００２０】これら３台の集じん要素２４で構成された
各集じん部２１ａ、集じん部２１ｂの外形は、これらに
連通する煙道ガスダクト１の外形と同じに設定されてい
て、図１中、Ｘ1 （ダクト幅）とＸ2 （ダクト厚）との
積で表される煙道ガスダクト１の有効断面積Ｘと、同じ
くＹ1 （集じん部２１ａ，２１ｂの全体のダクト幅）と
Ｙ2 （ダクト厚）との積で表される湿式電気集じん装置
２１の有効断面積Ｙとを同一の寸法にしてある。つま
り、Ｘ1 とＹ1 、Ｘ2 とＹ2 とは同一寸法であり、各集
じん要素２４内にはそのまま高速流（８ｍ／ｓ）で煙道
ガスＡが流れる。ここで、有効断面積とはダクトおよび
集じん装置内を流れるガス流路の断面積といってもよ
い。The outer shape of each of the dust collecting portions 21a and 21b composed of these three dust collecting elements 24 is set to be the same as the outer shape of the flue gas duct 1 communicating therewith, and in FIG. , X 1 (duct width) and X 2 (duct thickness), the effective sectional area X of the flue gas duct 1, and Y 1 (total duct width of the dust collecting portions 21a and 21b) and Y 2 The effective cross-sectional area Y of the wet electrostatic precipitator 21 represented by the product of (duct thickness) has the same size. That is, X 1 and Y 1 and X 2 and Y 2 have the same dimensions, and the flue gas A flows through each dust collecting element 24 as it is at a high speed flow (8 m / s). Here, the effective cross-sectional area may be referred to as the cross-sectional area of the gas passage that flows in the duct and the dust collector.
【００２１】なお、１段目の集じん部２１ａの集じん面
積は２段目の集じん面積の２／３以下、例えば１／２に
設定、具体的にはその集じん面積比を得るべく、小ダク
ト長を１／２としてある。The dust collecting area of the first-stage dust collecting portion 21a is set to be ⅔ or less, for example, 1/2 of the dust collecting area of the second stage, specifically, to obtain the dust collecting area ratio. , The small duct length is halved.
【００２２】但し、立上りダクト１ａおよび同部分に設
けた集じん部２１ａの重量は、支持脚２６を介して、吸
収塔１に支えられ、垂直ダクト１ｃおよび同部分に設け
た集じん部２１ｂの重量は垂直ダクト１ｃの下部に設け
た支持脚２７を介して支えられる。However, the weight of the rising duct 1a and the dust collecting portion 21a provided in the same portion is supported by the absorption tower 1 through the support legs 26, and the weight of the vertical duct 1c and the dust collecting portion 21b provided in the same portion. The weight is supported by the support legs 27 provided at the bottom of the vertical duct 1c.
【００２３】そして、集じん部２１ａ，２１ｂの集じん
要素２４には、高圧電源供給装置１９ａ〜１９ｆ（高圧
変圧整流装置）がそれぞれ設けられ、集じんに必要な電
源を供給できるようにしてある。また１段目の集じん部
２１ａに流れる電流は、安定した荷電状態の２段目の集
じん部２１ｂに流れる電流に比べて小さい（半分以
下）、例えば約１／３に設定されていて、１段目の集じ
ん部２１ａにおいて荷電の悪い状態を集中させ、２段目
において安定した荷電状態を得るようにしてある（１段
目では空間電荷効果が大きく、コロナ電流がクエンチ
（抑制）されることも考慮してあるから）。The dust collecting elements 24 of the dust collecting portions 21a and 21b are respectively provided with high-voltage power supply devices 19a to 19f (high-voltage transformer / rectifier device) so that the power required for dust collection can be supplied. . The current flowing through the first-stage dust collecting section 21a is set to be smaller (half or less) than the current flowing through the second-stage dust collecting section 21b in a stable charged state, for example, about 1/3. A badly charged state is concentrated in the dust collecting portion 21a of the first stage to obtain a stable charged state in the second stage (the space charge effect is large in the first stage and the corona current is quenched (suppressed)). I have also taken into consideration that).
【００２４】但し、各集じん部２１ａ，２１ｂは各小ダ
クト８における集じん空間が小空間化（ナオウスペイシ
ング）されるため、空間電荷の高い状態にあっても、通
常の湿式電気集じん装置に比べ、１０倍以上のコロナ電
流を電極空間に供給可能なため、高速流下でも十分な性
能を発揮できるものである。However, since the dust collecting space in each small duct 8 of each dust collecting portion 21a, 21b is made small (Naouse Pacing), even if the space charge is high, the normal wet electrostatic dust collecting is performed. Since a corona current that is 10 times or more that of the device can be supplied to the electrode space, sufficient performance can be exhibited even under high-speed flow.
【００２５】なお、図１中、２８は吸収塔１の出口に設
けられたミストエリミネ−タ、２９はデミスタ、３０は
シ−ルポット（集じん部２１ｂからの排水を吸収塔１に
流入させるもの）、３１はバッフルプレ−トである。で
ある。つぎに、このように構成されたダクト型の湿式電
気集じん装置２１の作用について説明する。In FIG. 1, 28 is a mist eliminator provided at the outlet of the absorption tower 1, 29 is a demister, and 30 is a seal pot (which allows waste water from the dust collecting part 21b to flow into the absorption tower 1). , 31 are baffle plates. Is. Next, the operation of the duct-type wet electrostatic precipitator 21 configured as described above will be described.
【００２６】ここで、この作用には、例えばボイラより
排出されたＳＯ2 ガス、ＳＯ3 ガス、ダスト等を含む煙
道ガスＡを処理するときを例に挙げて説明することにす
る。Here, this action will be explained by taking as an example the case of treating the flue gas A containing SO 2 gas, SO 3 gas, dust and the like discharged from the boiler.
【００２７】煙道ガスＡは、排煙脱硫装置の冷却塔２０
に流入されると、同冷却塔２０を通過するときに急冷さ
れる。その際、ＳＯ3 ガスの大部分が液化して、非常に
微細なＳＯ3 ミスト（硫酸ミスト）となる。The flue gas A is the cooling tower 20 of the flue gas desulfurizer.
Is rapidly cooled when passing through the cooling tower 20. At that time, most of the SO 3 gas is liquefied and becomes very fine SO 3 mist (sulfuric acid mist).
【００２８】ガスは、排煙脱硫装置の吸収塔１に導か
れ、ここでＳＯ2 ガスは吸収液（図示しない）に吸収さ
れた後、吸収塔１の最上部のミストエリミネ−タ２８に
至る（吸収液の多量のキャリオ−バを防ぐ）。ＳＯ3 お
よびダスト等を含むガスは、垂直上昇流を伴って、吸収
塔１の直上の１段目の集じん部２１ａへ流入する。The gas is guided to the absorption tower 1 of the flue gas desulfurization apparatus, where the SO 2 gas is absorbed by an absorption liquid (not shown) and then reaches the mist eliminator 28 at the top of the absorption tower 1 ( Prevents large amount of absorption liquid cariover). The gas containing SO 3 and dust and the like flows into the first-stage dust collecting section 21a immediately above the absorption tower 1 with a vertical upward flow.
【００２９】１段目の集じん部２１ａでは荷電状態が悪
いなりに、微細なＳＯ3 ミストの一部が集じんされる。
つまり、煙道ガスＡからＳＯ3 ミストの一部が取り除か
れる。１段目の集じん部２１ａを通過した煙道ガスＡの
流速は、吸収塔１からの流速と同じである。この１段目
の集じん部２１ａを経た煙道ガスＡは、水平ダクト１
ｂ、垂直ダクト１ｃを通じて、２段目の集じん部２１ｂ
に垂直下降流として流入していく。In the dust collecting portion 21a of the first stage, a part of fine SO 3 mist is collected even if the charged state is not good.
That is, part of the SO 3 mist is removed from the flue gas A. The flow velocity of the flue gas A passing through the first-stage dust collecting section 21a is the same as the flow velocity from the absorption tower 1. The flue gas A that has passed through the dust collecting portion 21a of the first stage is the horizontal duct 1
b, through the vertical duct 1c, the second-stage dust collecting portion 21b
Into the vertical downward flow.
【００３０】ここで、１段目の集じん部２１ａの出口に
おいて空間電荷は十分に低下しているので、２段目の集
じん部２１ｂにおいては十分な荷電状態が得られ、同集
じん部２１ｂにて高効率でＳＯ3 ミストならびにダスト
等が煙道ガスＡから取除かれる。これによって清浄とな
ったガスＢが煙突（図示しない）に導かれ、大気へ排出
される。Here, since the space charge is sufficiently reduced at the outlet of the first dust collecting section 21a, a sufficient charge state is obtained in the second dust collecting section 21b, and the same dust collecting section is obtained. At 21b, SO 3 mist and dust are removed from the flue gas A with high efficiency. The gas B thus cleaned is guided to a chimney (not shown) and discharged to the atmosphere.
【００３１】一方、こうした集じん中、各集じん部２１
ａ，２１ｂの上方にある洗浄ライン１４ａの各噴霧ノズ
ル１３ａからは洗浄液は供給され、集じん極８ａ上に集
められたダクトやミストを下方へ洗い流す。このうち１
段目の集じん部２１ａを洗浄した廃液は、排煙脱硫装置
へ流下する際、吸収塔１の出口のミストエリミネ−タ２
８を洗浄した後、吸収塔１の廃液と一括して廃液処理が
なされる。On the other hand, during such dust collection, each dust collecting part 21
The cleaning liquid is supplied from the spray nozzles 13a of the cleaning line 14a above the a and 21b, and the ducts and mists collected on the dust collecting electrode 8a are washed down. 1 of these
The waste liquid that has washed the dust collecting portion 21a of the stage is, when flowing down to the flue gas desulfurization device, a mist eliminator 2 at the outlet of the absorption tower 1.
After washing 8, the waste liquid is treated together with the waste liquid in the absorption tower 1.
【００３２】こうした集じんは、吸収塔１と湿式電気集
じん装置２１との有効断面積は同じなので、従来の径が
大きなダクトを用いる電気集じん装置とは異なり、圧力
上昇損失の発生する原因となる部分はない。それ故、煙
道ガスＡを送る送気ファンの小型化を図ることができ
る。しかも、従来の電気集じん装置で用いられていた整
流板を設ける必要がない。In such a dust collector, since the absorption tower 1 and the wet electrostatic precipitator 21 have the same effective sectional area, unlike the conventional electrostatic precipitator using a duct having a large diameter, the cause of the pressure rise loss is caused. There is no part that becomes. Therefore, it is possible to reduce the size of the air supply fan that sends the flue gas A. Moreover, it is not necessary to provide the current plate used in the conventional electrostatic precipitator.
【００３３】また２段の集じん部２１ａ，２１ｂの採用
により、高い集じん性能を得ることができる。しかも、
１段目は煙道ガスダクト２の垂直上昇部分にあり、２段
目は垂直下降部分にあるので、大きな据付スペ−スを必
要とせずに、２段の集じん部２１ａ，２１ｂをもつ湿式
電気集じん装置２１を据付けることができる。Further, by adopting the two-stage dust collecting portions 21a and 21b, high dust collecting performance can be obtained. Moreover,
Since the first stage is in the vertically rising part of the flue gas duct 2 and the second stage is in the vertically descending part, there is no need for a large installation space, and there is no need for a large installation space. The dust collector 21 can be installed.
【００３４】なお、上述した第１の実施例では２段の集
じん部をもつダクト型の湿式電気集じん装置を据付ける
例を挙げたが、これに限らず、図４に示すような１段式
のダクト型の湿式電気集じん装置３５にこの発明を適用
してもよい。但し、図３において、第１の実施例と同じ
部分には同一符号を付してその説明を省略した。In the first embodiment described above, an example of installing a duct type wet electrostatic precipitator having a two-stage dust collecting section has been described, but the present invention is not limited to this, and one such as shown in FIG. The present invention may be applied to the step-type duct-type wet electrostatic precipitator 35. However, in FIG. 3, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.
【００３５】[0035]
【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、従来の径が大きなダクトを
用いる電気集じん装置とは異なり、圧力上昇損失の発生
する原因となる部分はないので、ダクト内の圧力上昇損
失を発生させずにすむ。したがって、処理ガスを送る送
気ファンの小型化を図ることができる。また請求項２に
記載の発明によれば、請求項１の効果に加え、２段の集
じん部の採用により、高い集じん性能を得ることができ
る。As described above, according to the inventions of claims 1 and 2, unlike the conventional electrostatic precipitator using a duct having a large diameter, it causes a pressure rise loss. Since there are no parts, it is possible to avoid the pressure rise loss in the duct. Therefore, it is possible to reduce the size of the air supply fan that sends the processing gas. Further, according to the invention described in claim 2, in addition to the effect of claim 1, high dust collecting performance can be obtained by adopting the two-stage dust collecting portion.
【００３６】しかも、１段目はダクトの垂直上昇部分に
あり、２段目は垂直下降部分にあるので、大きな据付ス
ペ−スを必要とせずに２段の集じん部をもつ湿式電気集
じん装置を据付けることができるものである。Moreover, since the first stage is in the vertically rising portion of the duct and the second stage is in the vertically descending portion, there is no need for a large installation space and the wet electrostatic precipitator having the two-stage dust collecting portion. The equipment can be installed.
【図１】（ａ）は、この発明の第１の実施例の電気集じ
ん装置を、同装置を装備した排煙脱硫系と共に示す平面
図。（ｂ）は、同正面図。FIG. 1A is a plan view showing an electrostatic precipitator according to a first embodiment of the present invention together with a flue gas desulfurization system equipped with the same. (B) is the same front view.
【図２】同実施例の斜視図。FIG. 2 is a perspective view of the same embodiment.
【図３】同実施例の電気集じん装置の断面図。FIG. 3 is a sectional view of the electrostatic precipitator of the same embodiment.
【図４】この発明の第２の実施例を示す斜視図。FIG. 4 is a perspective view showing a second embodiment of the present invention.
【図５】従来の電気集じん装置を、同装置を装備した排
煙脱硫系と共に示す斜視図。FIG. 5 is a perspective view showing a conventional electrostatic precipitator together with a flue gas desulfurization system equipped with the same.
【図６】同湿式電気集じん装置を示す断面図。FIG. 6 is a cross-sectional view showing the wet electrostatic precipitator.
１…吸収塔、２…煙道ガスダクト、２１，３５…ダクト
型の湿式電気集じん装置、２１ａ…集じん部、２１ｂ…
集じん部。DESCRIPTION OF SYMBOLS 1 ... Absorption tower, 2 ... Flue gas duct, 21, 35 ... Duct type wet electrostatic precipitator, 21a ... Dust collector, 21b ...
Dust collector.
Claims (2)
に、ダクトを介し、前記反応塔と隣接して、湿式電気集
じん装置を垂設してなる電気集じん装置において、 前記反応塔から前記湿式集じん装置までを連通するダク
トの有効断面積と、前記湿式電気集じん装置の有効断面
積とを同一にしたことを特徴とする電気集じん装置。1. An electrostatic precipitator in which a wet electrostatic precipitator is vertically installed via a duct at the flue gas outlet of a reaction tower for carrying out a reaction treatment and adjacent to the reaction tower. An electrostatic precipitator which is characterized in that an effective cross-sectional area of a duct communicating from the wet precipitator to the wet precipitator is the same as that of the wet electrostatic precipitator.
流部に集じん部を２段に設けてなり、１段目の集じん部
はダクトの垂直上昇部分内に設けられ、２段目の集じん
部はダクトの垂直下降部分内に設けられていることを特
徴とする請求項１に記載の電気集じん装置。2. The wet electrostatic precipitator is provided with a dust collecting section in two stages upstream of the duct, and the dust collecting section of the first stage is provided in a vertically rising portion of the duct. The electrostatic precipitator according to claim 1, wherein the dust collector is provided in a vertically descending portion of the duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19248292A JP3202339B2 (en) | 1992-07-20 | 1992-07-20 | Electric dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19248292A JP3202339B2 (en) | 1992-07-20 | 1992-07-20 | Electric dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0631204A true JPH0631204A (en) | 1994-02-08 |
| JP3202339B2 JP3202339B2 (en) | 2001-08-27 |
Family
ID=16292031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19248292A Expired - Fee Related JP3202339B2 (en) | 1992-07-20 | 1992-07-20 | Electric dust collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3202339B2 (en) |
-
1992
- 1992-07-20 JP JP19248292A patent/JP3202339B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3202339B2 (en) | 2001-08-27 |
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