{一}、改造方案的對比分析

為了選擇合適的濕式靜(jing)電除塵器(qi)改造(zao)(zao)(zao)(zao)方(fang)案、降低改造(zao)(zao)(zao)(zao)的成(cheng)本、減少投(tou)資和運行維護費用，對(dui)(dui)改造(zao)(zao)(zao)(zao)方(fang)案進行技術(shu)經(jing)濟(ji)(ji)。下面從技術(shu)性能(neng)特點和經(jing)濟(ji)(ji)性兩方(fang)面對(dui)(dui)三種靜(jing)電除塵器(qi)的改造(zao)(zao)(zao)(zao)方(fang)案進行對(dui)(dui)比(bi)分析。

對于比較(jiao)(jiao)(jiao)適合靜(jing)電(dian)(dian)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)收塵(chen)(chen)(chen)(chen)的(de)粉(fen)塵(chen)(chen)(chen)(chen)，靜(jing)電(dian)(dian)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)具有除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)效率(lv)較(jiao)(jiao)(jiao)高(gao)、阻力小、運行成本低(di)、維(wei)護方(fang)便等優點。當場(chang)地條件(jian)和(he)粉(fen)塵(chen)(chen)(chen)(chen)特(te)性(xing)允許時(shi)，增(zeng)加(jia)(jia)電(dian)(dian)場(chang)是較(jiao)(jiao)(jiao)容(rong)易實現的(de)改(gai)(gai)造(zao)(zao)方(fang)案(an)。但對于較(jiao)(jiao)(jiao)難收集的(de)低(di)硫煤(mei)、高(gao)鋁、高(gao)硅、低(di)鈉這種粉(fen)塵(chen)(chen)(chen)(chen)時(shi)，即(ji)使靜(jing)電(dian)(dian)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)增(zeng)加(jia)(jia)至5一6個電(dian)(dian)場(chang)，也(ye)很難達到新的(de)排放(fang)標準的(de)要(yao)求。因此，增(zeng)加(jia)(jia)電(dian)(dian)場(chang)的(de)改(gai)(gai)造(zao)(zao)方(fang)案(an)有較(jiao)(jiao)(jiao)大的(de)局限性(xing)。與(yu)靜(jing)電(dian)(dian)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)相比，袋式(shi)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)不受(shou)粉(fen)塵(chen)(chen)(chen)(chen)特(te)性(xing)的(de)影響(xiang)。它具有除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)、對亞微米粒(li)徑的(de)細微顆粒(li)有較(jiao)(jiao)(jiao)高(gao)的(de)分級除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)效率(lv)、結構簡單、維(wei)護方(fang)便等優點；但也(ye)存在(zai)運行阻力大、濾袋容(rong)易腐(fu)蝕(shi)、受(shou)煙氣溫度條件(jian)限制大等局限性(xing)。在(zai)改(gai)(gai)造(zao)(zao)為袋式(shi)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)時(shi)，可以充分利用(yong)原有靜(jing)電(dian)(dian)除(chu)(chu)(chu)(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器(qi)(qi)(qi)的(de)殼體等材料。

靜(jing)電(dian)袋(dai)(dai)式復合(he)除(chu)塵器(qi)是(shi)靜(jing)電(dian)除(chu)塵器(qi)和(he)袋(dai)(dai)式除(chu)塵器(qi)的(de)(de)結(jie)合(he)，前(qian)電(dian)后袋(dai)(dai)，既具(ju)有(you)靜(jing)電(dian)除(chu)塵器(qi)壓力降小、運行成本低的(de)(de)優點，又(you)具(ju)有(you)袋(dai)(dai)式除(chu)塵器(qi)對煤種不敏(min)感(gan)、徽細粉塵收集的(de)(de)優點。它占(zhan)地(di)面積小、除(chu)塵。在(zai)應用于(yu)靜(jing)電(dian)除(chu)塵器(qi)改造(zao)時，可以充分(fen)利用原有(you)的(de)(de)材料(liao)，而且不受場(chang)地(di)條(tiao)件(jian)的(de)(de)制約。

靜(jing)(jing)電除(chu)(chu)(chu)塵器(qi)(qi)改造(zao)方(fang)(fang)案(an)(an)的(de)(de)經(jing)濟性(xing)主要(yao)體現在設(she)備(bei)投資(zi)費用(yong)、運行維(wei)護費用(yong)以及(ji)排污(煙(yan)塵)收費等方(fang)(fang)面(mian)。增加電場的(de)(de)方(fang)(fang)案(an)(an)和改造(zao)為袋(dai)(dai)(dai)(dai)式(shi)(shi)除(chu)(chu)(chu)塵器(qi)(qi)的(de)(de)方(fang)(fang)案(an)(an)都能(neng)利用(yong)原有(you)的(de)(de)一些(xie)材料，在設(she)備(bei)投資(zi)方(fang)(fang)面(mian)二者相(xiang)差不大(da)(da)，改造(zao)為靜(jing)(jing)電袋(dai)(dai)(dai)(dai)式(shi)(shi)復合(he)除(chu)(chu)(chu)塵器(qi)(qi)的(de)(de)方(fang)(fang)案(an)(an)由于(yu)使用(yong)的(de)(de)濾袋(dai)(dai)(dai)(dai)數(shu)量(liang)(liang)少(shao)設(she)備(bei)投資(zi)降(jiang)低。靜(jing)(jing)電除(chu)(chu)(chu)塵器(qi)(qi)雖(sui)然風機能(neng)耗較(jiao)小(xiao)，但電場能(neng)耗大(da)(da)；袋(dai)(dai)(dai)(dai)式(shi)(shi)除(chu)(chu)(chu)塵器(qi)(qi)運行阻力大(da)(da)，濾袋(dai)(dai)(dai)(dai)壽命相(xiang)對(dui)較(jiao)短、風機能(neng)耗也(ye)大(da)(da)；靜(jing)(jing)電袋(dai)(dai)(dai)(dai)式(shi)(shi)復合(he)除(chu)(chu)(chu)塵與袋(dai)(dai)(dai)(dai)式(shi)(shi)除(chu)(chu)(chu)塵器(qi)(qi)相(xiang)比，可以減(jian)少(shao)濾袋(dai)(dai)(dai)(dai)、袋(dai)(dai)(dai)(dai)籠、脈沖閥(fa)的(de)(de)數(shu)量(liang)(liang)，其運行阻力、清灰壓縮空(kong)氣(qi)(qi)(qi)耗量(liang)(liang)、濾袋(dai)(dai)(dai)(dai)壽命等均低于(yu)袋(dai)(dai)(dai)(dai)式(shi)(shi)除(chu)(chu)(chu)塵器(qi)(qi)，所以運行維(wei)護費用(yong)較(jiao)低。靜(jing)(jing)電除(chu)(chu)(chu)塵器(qi)(qi)的(de)(de)煙(yan)氣(qi)(qi)(qi)出口(kou)含(han)(han)(han)塵濃度(du)通常(chang)高于(yu)100mg/m3，袋(dai)(dai)(dai)(dai)式(shi)(shi)除(chu)(chu)(chu)塵器(qi)(qi)的(de)(de)煙(yan)氣(qi)(qi)(qi)出口(kou)含(han)(han)(han)塵濃度(du)一般在50mg/m3，靜(jing)(jing)電袋(dai)(dai)(dai)(dai)式(shi)(shi)復合(he)除(chu)(chu)(chu)塵器(qi)(qi)的(de)(de)煙(yan)氣(qi)(qi)(qi)出口(kou)含(han)(han)(han)塵濃度(du)很低，能(neng)達(da)到30mg/m3，因(yin)此(ci)它在排污收費方(fang)(fang)面(mian)也(ye)有(you)較(jiao)大(da)(da)的(de)(de)優點。

隨著我國環保標準的日(ri)益嚴格，越來(lai)越多的燃(ran)煤電(dian)廠(chang)靜(jing)電(dian)除(chu)(chu)塵(chen)(chen)(chen)器(qi)需要進行(xing)改(gai)(gai)(gai)造(zao)；增加電(dian)場的改(gai)(gai)(gai)造(zao)方案(an)既受(shou)(shou)到場地條(tiao)件的限制(zhi)，又受(shou)(shou)到粉塵(chen)(chen)(chen)特(te)性(xing)的制(zhi)約(yue)，而且除(chu)(chu)塵(chen)(chen)(chen)效(xiao)果不及(ji)其(qi)它兩個(ge)方案(an)；隨著濾袋濾料(liao)技(ji)(ji)術的成熟，袋式除(chu)(chu)塵(chen)(chen)(chen)器(qi)將在我國燃(ran)煤電(dian)廠(chang)中廣(guang)泛的應用，改(gai)(gai)(gai)造(zao)為袋式除(chu)(chu)塵(chen)(chen)(chen)器(qi)的方案(an)將很多地采用；對于現(xian)役機組配套靜(jing)電(dian)除(chu)(chu)塵(chen)(chen)(chen)器(qi)來(lai)說，靜(jing)電(dian)袋式復合除(chu)(chu)塵(chen)(chen)(chen)器(qi)是(shi)(shi)較經濟(ji)、也是(shi)(shi)效(xiao)果較佳的方案(an)，靜(jing)電(dian)袋式復合除(chu)(chu)塵(chen)(chen)(chen)技(ji)(ji)術是(shi)(shi)未(wei)來(lai)我國除(chu)(chu)塵(chen)(chen)(chen)技(ji)(ji)術的發展(zhan)方向之一。

{二}、提(ti)高微細顆粒(li)的脫除效率

微(wei)(wei)細顆粒(li)(li)物質量輕、粒(li)(li)徑小、流動跟隨性(xing)好、吸附性(xing)強且(qie)較難脫(tuo)除(chu)，是(shi)造(zao)成大(da)氣(qi)(qi)(qi)能見(jian)度降低、灰(hui)霾(mai)天氣(qi)(qi)(qi)、酸雨、氣(qi)(qi)(qi)候變化等重大(da)問題的(de)重要(yao)因素，由其引發的(de)污染已成為(wei)我(wo)國突出的(de)大(da)氣(qi)(qi)(qi)環(huan)境問題，而燃(ran)煤(mei)電(dian)(dian)(dian)廠是(shi)引起我(wo)國大(da)氣(qi)(qi)(qi)環(huan)境中微(wei)(wei)細顆粒(li)(li)物濃度增加(jia)的(de)重要(yao)污染源之(zhi)一。干式靜(jing)電(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)(qi)(qi)(DESP)具率高(gao)、能耗(hao)低、煙氣(qi)(qi)(qi)處(chu)理量大(da)等優點，目前我(wo)國有90%~的(de)燃(ran)煤(mei)電(dian)(dian)(dian)廠采(cai)用(yong)DESP對燃(ran)煤(mei)煙氣(qi)(qi)(qi)進行除(chu)塵(chen)(chen)處(chu)理，但由于微(wei)(wei)細顆粒(li)(li)(粒(li)(li)徑小于10μm)荷電(dian)(dian)(dian)效果(guo)差，電(dian)(dian)(dian)遷移率低，其脫(tuo)除(chu)效率并不(bu)(bu)理想(xiang)，通常(chang)不(bu)(bu)超過90%；此外，DESP靠(kao)振(zhen)打清(qing)灰(hui)，易(yi)出現(xian)二次揚塵(chen)(chen)及(ji)反電(dian)(dian)(dian)暈現(xian)象，也(ye)降低了(le)對細顆粒(li)(li)物脫(tuo)除(chu)效率。目前工業多采(cai)取增加(jia)電(dian)(dian)(dian)場數、增加(jia)除(chu)塵(chen)(chen)器(qi)(qi)(qi)的(de)寬度和增加(jia)除(chu)塵(chen)(chen)器(qi)(qi)(qi)的(de)高(gao)度等手段來增加(jia)收塵(chen)(chen)面積(ji)，從而提(ti)高(gao)靜(jing)電(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)(qi)(qi)配件的(de)脫(tuo)除(chu)效率，但該改造(zao)方案需增加(jia)占地面積(ji)、投資運行費用(yong)較高(gao)，適用(yong)的(de)項目范圍較窄陣，且(qie)振(zhen)打導致的(de)顆粒(li)(li)物脫(tuo)除(chu)效率降低的(de)關鍵(jian)性(xing)問題依舊沒(mei)有解決(jue)。

為適應新排放(fang)標準，提(ti)高(gao)微細顆粒的脫除(chu)效率(lv)，在傳(chuan)統(tong)DESP除(chu)塵(chen)(chen)技(ji)術(shu)上發展新型除(chu)塵(chen)(chen)技(ji)術(shu)成為研究趨勢，新型靜(jing)電(dian)(dian)除(chu)塵(chen)(chen)增效技(ji)術(shu)主要包括移動極板(ban)(ban)技(ji)術(shu)、低(di)低(di)溫(wen)(wen)技(ji)術(shu)、電(dian)(dian)袋(dai)復(fu)合式除(chu)塵(chen)(chen)技(ji)術(shu)和濕式靜(jing)電(dian)(dian)除(chu)塵(chen)(chen)技(ji)術(shu)。但在實際工業應用(yong)中，移動極板(ban)(ban)技(ji)術(shu)陽極板(ban)(ban)機(ji)械結(jie)構(gou)過于復(fu)雜，制作、運行成本高(gao)，設(she)備維護困難；低(di)低(di)溫(wen)(wen)電(dian)(dian)除(chu)塵(chen)(chen)器(qi)(qi)技(ji)術(shu)加裝熱交換(huan)裝置會帶來系統(tong)流體阻力增加及設(she)備占(zhan)地面積增加等問題，同(tong)時由于煙氣溫(wen)(wen)度(du)降低(di)到酸結(jie)露(lu)以下(xia)，換(huan)熱器(qi)(qi)及電(dian)(dian)除(chu)塵(chen)(chen)器(qi)(qi)均存在酸腐蝕風險。

電袋(dai)復合式除塵技術在實際運(yun)行中難以處理高溫煙氣，易出現“燒袋(dai)”現象，且對鍋(guo)爐(lu)運(yun)行煙氣濕度及含氧量要求高，輔助系統復雜(za)，故障率較高。

而WESP與常規的(de)(de)DESP除塵(chen)原理及結(jie)構基本相(xiang)同，使用(yong)噴淋系統(tong)在收(shou)塵(chen)極形(xing)成水膜代(dai)替(ti)傳統(tong)DESP的(de)(de)振打清灰系統(tong)，兼具DESP的(de)(de)優(you)點且(qie)克服了反(fan)電暈和二次揚塵(chen)問(wen)題(ti)，結(jie)構簡單同時又沒有以上增效(xiao)技術存(cun)在的(de)(de)問(wen)題(ti)，具有很(hen)高的(de)(de)除塵(chen)效(xiao)率，隨著火電廠大(da)氣污染(ran)物排放標準(zhun)的(de)(de)日趨嚴格，濕式電除塵(chen)器在燃煤電站的(de)(de)應用(yong)越來越廣泛，針對濕靜電除塵(chen)器脫除微細顆(ke)粒的(de)(de)問(wen)題(ti)近年學者也開展了大(da)量(liang)的(de)(de)研究(jiu)。

用ELPI測試不同電場強度、停(ting)留時(shi)問(wen)(wen)、顆(ke)粒粒徑下微(wei)細(xi)顆(ke)粒在濕式電除(chu)(chu)塵器內的(de)脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)，研究發(fa)現，隨著停(ting)留時(shi)問(wen)(wen)增長(chang)，脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)從(cong)57%上升至(zhi)，隨著電場強度增大(da)，脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)提高。同初(chu)始微(wei)細(xi)顆(ke)粒濃度對脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)的(de)影響，隨著顆(ke)粒物初(chu)始濃度降低，脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)有所下降，分(fen)級脫(tuo)除(chu)(chu)效(xiao)率(lv)(lv)(lv)整體成U型(xing)分(fen)布。

新型濕(shi)(shi)式電(dian)除(chu)(chu)(chu)塵器(qi)(qi)，除(chu)(chu)(chu)塵器(qi)(qi)荷電(dian)區與收(shou)塵區分開，發現荷電(dian)區對細(xi)顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)物脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)為10%，提(ti)高(gao)荷電(dian)區與收(shou)塵區電(dian)壓及減(jian)少收(shou)塵區極(ji)問距均對脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)應具有作(zuo)用，可高(gao)達99.7%。水膜(mo)對微細(xi)顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)靜(jing)電(dian)脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)的影響規律，結果表明粒(li)(li)(li)(li)徑(jing)為0.5μm時的脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)較低，隨著(zhu)顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)直徑(jing)的增大或(huo)減(jian)小，顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)都(dou)將增大。水膜(mo)能夠顯著(zhu)提(ti)高(gao)小顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)的靜(jing)電(dian)脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)，當顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)直徑(jing)小于(yu)0.1μm顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)提(ti)高(gao)約50%，對大顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)的脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)也有較顯著(zhu)的作(zuo)用高(gao)約8%。以(yi)上(shang)研(yan)究(jiu)，多(duo)為濕(shi)(shi)式電(dian)除(chu)(chu)(chu)塵器(qi)(qi)污染(ran)物脫(tuo)(tuo)除(chu)(chu)(chu)宏觀(guan)效(xiao)(xiao)(xiao)率(lv)(lv)試驗(yan)，缺乏對于(yu)濕(shi)(shi)式電(dian)除(chu)(chu)(chu)塵器(qi)(qi)內(nei)部(bu)顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)的分布(bu)、受力與運動特(te)性等方面(mian)的研(yan)究(jiu)，而這對于(yu)優化濕(shi)(shi)式電(dian)除(chu)(chu)(chu)塵過程進一步提(ti)高(gao)微細(xi)顆(ke)(ke)(ke)(ke)粒(li)(li)(li)(li)脫(tuo)(tuo)除(chu)(chu)(chu)效(xiao)(xiao)(xiao)率(lv)(lv)至(zhi)關重(zhong)要。

通過(guo)ELPI對電除(chu)(chu)塵(chen)(chen)器除(chu)(chu)塵(chen)(chen)過(guo)程中微細顆粒(li)(li)(li)的(de)濃(nong)度分布進行(xing)實時(shi)測量，基(ji)于顆粒(li)(li)(li)濃(nong)度變化研究(jiu)分析了水膜(mo)對微細顆粒(li)(li)(li)在靜(jing)電除(chu)(chu)塵(chen)(chen)器內的(de)分布狀況(kuang)、運動軌跡、沉積情(qing)況(kuang)、分級效率及力學行(xing)為等的(de)影響，揭(jie)示水膜(mo)影響微細顆粒(li)(li)(li)脫(tuo)除(chu)(chu)效率的(de)機(ji)理(li)(li)，為濕式電除(chu)(chu)塵(chen)(chen)器脫(tuo)除(chu)(chu)微細顆粒(li)(li)(li)奠定(ding)理(li)(li)論基(ji)礎。

改(gai)進電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)結構在(zai)(zai)(zai)單區(qu)(qu)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)器(qi)中(zhong)，粒子的(de)(de)(de)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)捕集(ji)都在(zai)(zai)(zai)一個(ge)區(qu)(qu)內(nei)完成，而雙(shuang)(shuang)區(qu)(qu)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)器(qi)的(de)(de)(de)粒子荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)部分和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)部分是(shi)分開的(de)(de)(de)。前區(qu)(qu)安裝電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈極，粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)在(zai)(zai)(zai)此(ci)區(qu)(qu)內(nei)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，后區(qu)(qu)安裝收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)極，粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)在(zai)(zai)(zai)此(ci)區(qu)(qu)內(nei)被捕集(ji)。雙(shuang)(shuang)區(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)技術是(shi)在(zai)(zai)(zai)末(mo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)中(zhong)，將(jiang)單一的(de)(de)(de)高壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)，并(bing)用不同(tong)(tong)的(de)(de)(de)高壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。根(gen)據需(xu)要(yao)，有(you)所區(qu)(qu)別(bie)地(di)(di)向(xiang)這兩(liang)個(ge)區(qu)(qu)供(gong)(gong)應適宜(yi)的(de)(de)(de)運(yun)行(xing)(xing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)其(qi)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)功能。荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)主要(yao)是(shi)對粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)進行(xing)(xing)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)同(tong)(tong)時(shi)又(you)在(zai)(zai)(zai)陽極板上收(shou)(shou)集(ji)帶(dai)負電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)(he)(he)(he)的(de)(de)(de)粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)。收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)則(ze)使顆(ke)粒從煙氣(qi)中(zhong)分離，將(jiang)絕大部分的(de)(de)(de)顆(ke)粒吸附(fu)到(dao)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)板上；同(tong)(tong)一些(xie)帶(dai)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)(he)(he)(he)的(de)(de)(de)顆(ke)粒吸附(fu)至其(qi)陰極(又(you)稱輔助電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極)。雙(shuang)(shuang)區(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)由于(yu)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)分開后，在(zai)(zai)(zai)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)可(ke)以比(bi)較靈(ling)活地(di)(di)調整(zheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，通(tong)過(guo)(guo)減(jian)小極間(jian)距，可(ke)以在(zai)(zai)(zai)較低的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下(xia)能使塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒充(chong)分地(di)(di)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，運(yun)行(xing)(xing)也很。在(zai)(zai)(zai)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)，可(ke)地(di)(di)提(ti)高收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)(de)均勻(yun)性(xing)，有(you)利于(yu)提(ti)效率。對雙(shuang)(shuang)區(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)對粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)驅進速(su)度的(de)(de)(de)提(ti)高系數研究(jiu)(jiu)表(biao)(biao)明，為(wei)防止(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)器(qi)發生反電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈問題(ti)并(bing)提(ti)效率，在(zai)(zai)(zai)末(mo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)采用雙(shuang)(shuang)區(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)結構，將(jiang)粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)荷(he)(he)(he)(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)、收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)的(de)(de)(de)過(guo)(guo)程及其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備分開，使兩(liang)個(ge)區(qu)(qu)域的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣(qi)運(yun)行(xing)(xing)參數分別(bie)達(da)到(dao)較佳化。通(tong)過(guo)(guo)實驗研究(jiu)(jiu)表(biao)(biao)明，與傳統臥(wo)式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)器(qi)相比(bi)，雙(shuang)(shuang)區(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)可(ke)使粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)平均驅進速(su)度提(ti)高20%左右(you)；除塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)效率則(ze)隨之(zhi)上升，并(bing)將(jiang)粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)排(pai)放濃度降低到(dao)50mg/m3以下(xia)。