一． 電袋復合除塵器概述
1.A summary of electricity composite filter bag
電袋復合式除塵器是有機結合了靜電除塵和布袋除塵的特點，通過前級電場的預收塵、荷電作用和后級濾袋區過濾除塵的一種高效除塵器，它充分發揮電除塵器和布袋除塵器各自的除塵優勢，以及兩者相結合產生新的性能優點，彌補了電除塵器和布袋除塵器的除塵缺點。該復合型除塵器具有效率高，穩定，濾袋阻力低，壽命長，占地面積小等優點，是未來控制細微顆粒粉塵、PM2.5以及重金屬汞等多污染物協同處理的主要技術手段。
Electricity compound bag precipitator is organic combination of the characteristics of the electrostatic dust collection and bag dust removal, dust deposit by level before the electric field, the function and level after charged area filter bag filter dust removal of a highly efficient dust catcher, it give full play to the electric dust collector and dust advantages of bag dust collector, as well as the combination of both to create new performance advantages, make up for the shortcomings of electrostatic precipitator and cloth dust collector. The composite filter with high efficiency, stable, filter bag low resistance, long service life, cover an area of an area small, etc, will be the future control of tiny particles of dust, PM2.5 and more pollutants such as heavy metal mercury together to deal with the main technical means.
二． 結構形式
2. Structure form
前級電除塵區秉承了電除塵器電場的除塵優勢，其除塵效率與極板有效面積呈指數曲線變化，能收集煙塵中大部分粉塵，收塵效率達70-80%，并使流經電除塵區未被收集下的微細粉塵電離荷電。一方面大大降低進入布袋除塵器區含塵濃度，另一方面荷電后的粉塵在濾袋沉積的粉餅呈低阻特性，從而既達到排放濃度小于30mg/Nm3的環保要求，又提高了除塵器整體性能的功效。
Level before the electric area receives the first electric field of electrostatic precipitators, its dust removal efficiency and the effective area of exponential curve plate, can collect most of the smoke dust, dust collecting efficiency of 70-80%, and flows through the electric area has not been collected under the fine dust of ionization charged. On the one hand, greatly reduce the dust concentration of entering bag dust collector area, on the other hａnd charged dust in the filter bag after the deposition of powdery cake is of low resistance, thus achieves emission concentration is less than 30 mg/Nm3 requirements of environmental protection, and increase the effectiveness of the overall performance of the filter.
三.技術特點
3. Technical characteristics
（1）除塵機理：由于在電袋復合式除塵器中，煙氣先通過電除塵區后再緩慢進入后級布袋除塵區，布袋除塵區捕集的粉塵量僅有入口的1/4。這樣濾袋的粉塵負荷量大大降低，清灰周期得以大幅度延長；粉塵經過電除塵區電離荷電，粉塵的荷電提高了粉塵在濾袋上的過濾特性，即濾袋的透氣性能、清灰性能方面得到大大的改善。合理運用電除塵器和布袋除塵器各自的除塵優點，以及兩者相結合產生新的功能，能充分克服電除塵和布袋除塵的除塵缺點。根據目前的試驗研究和在電力鍋爐煙塵的工業應用，證明該技術是一種科學、可靠、*的技術。綜合了二種除塵方式的優點。
(1) the dust removal mechanism in electricity compound bag dust collector, the flue gas through electric precipitation area and then slowly into the first grade bag dust removal after area, cloth bag dust control area, the amount of dust catcher is only a quarter of entry. The filter bag dust load is reduced greatly, soot cleaning cycle can be greatly extended; Ionization charged dust after the electric area, dust charged improve the dust on the filter bag filter characteristics, namely, the permeability of filter bag, ash removal performance have been improved greatly. Their reasonable using electrostatic precipitators and bag filter dust removal, and the combination creates new functions, can overcome the disadvantages of the electric and bag dust removal. According to the present experimental study and industrial application in power boiler soot, proved that the technology is a scientific, reliable and advanced technology. Taking advantages of the two kinds of schemes.
（2）保證長期高效穩定運行：電袋復合式除塵器的除塵效率不受煤種、煙氣特性、飛灰比電阻影響，可以長期保持高效、穩定、可靠地運行，保證排放濃度低于30mg/Nm3。
