{一}、提高微細顆粒的脫除效率

　　微(wei)細(xi)顆(ke)粒(li)(li)物質量輕、粒(li)(li)徑(jing)小、流動跟(gen)隨性好(hao)、吸附性強且較難脫(tuo)(tuo)除(chu)(chu)，是造成大(da)(da)氣(qi)能見度降低(di)、灰霾(mai)天氣(qi)、酸雨、氣(qi)候變化(hua)等重(zhong)大(da)(da)問(wen)題(ti)的(de)(de)(de)(de)(de)(de)重(zhong)要(yao)因素，由其引發(fa)的(de)(de)(de)(de)(de)(de)污(wu)染(ran)(ran)已成為我國突出的(de)(de)(de)(de)(de)(de)大(da)(da)氣(qi)環(huan)境問(wen)題(ti)，而燃煤(mei)電(dian)廠是引起我國大(da)(da)氣(qi)環(huan)境中微(wei)細(xi)顆(ke)粒(li)(li)物濃度增加(jia)(jia)(jia)的(de)(de)(de)(de)(de)(de)重(zhong)要(yao)污(wu)染(ran)(ran)源之一。干式靜電(dian)除(chu)(chu)塵器(DESP)具率(lv)高(gao)、能耗(hao)低(di)、煙(yan)氣(qi)處理(li)量大(da)(da)等優點，目(mu)前我國有90%~的(de)(de)(de)(de)(de)(de)燃煤(mei)電(dian)廠采(cai)用(yong)DESP對(dui)燃煤(mei)煙(yan)氣(qi)進(jin)行除(chu)(chu)塵處理(li)，但由于微(wei)細(xi)顆(ke)粒(li)(li)(粒(li)(li)徑(jing)小于10μm)荷電(dian)效(xiao)(xiao)果差，電(dian)遷移(yi)率(lv)低(di)，其脫(tuo)(tuo)除(chu)(chu)效(xiao)(xiao)率(lv)并不(bu)理(li)想，通常不(bu)超過90%；此外(wai)，DESP靠振(zhen)打清灰，易出現二次揚塵及反電(dian)暈現象，也降低(di)了對(dui)細(xi)顆(ke)粒(li)(li)物脫(tuo)(tuo)除(chu)(chu)效(xiao)(xiao)率(lv)。目(mu)前工業多(duo)采(cai)取增加(jia)(jia)(jia)電(dian)場數、增加(jia)(jia)(jia)除(chu)(chu)塵器的(de)(de)(de)(de)(de)(de)寬度和增加(jia)(jia)(jia)除(chu)(chu)塵器的(de)(de)(de)(de)(de)(de)高(gao)度等手段來(lai)增加(jia)(jia)(jia)收塵面積，從而提(ti)高(gao)靜電(dian)除(chu)(chu)塵器的(de)(de)(de)(de)(de)(de)脫(tuo)(tuo)除(chu)(chu)效(xiao)(xiao)率(lv)，但該改(gai)造方案需增加(jia)(jia)(jia)占地(di)面積、投資運行費用(yong)較高(gao)，適用(yong)的(de)(de)(de)(de)(de)(de)項目(mu)范(fan)圍較窄陣，且振(zhen)打導致(zhi)的(de)(de)(de)(de)(de)(de)顆(ke)粒(li)(li)物脫(tuo)(tuo)除(chu)(chu)效(xiao)(xiao)率(lv)降低(di)的(de)(de)(de)(de)(de)(de)關鍵性問(wen)題(ti)依(yi)舊沒有解決。

為適應(ying)新排放標準(zhun)，提(ti)高(gao)(gao)微細顆(ke)粒(li)的脫除(chu)(chu)效率(lv)，在(zai)傳統(tong)DESP除(chu)(chu)塵(chen)技(ji)(ji)術(shu)(shu)上(shang)發(fa)展(zhan)新型除(chu)(chu)塵(chen)技(ji)(ji)術(shu)(shu)成為研(yan)究趨勢，新型靜電除(chu)(chu)塵(chen)增(zeng)效技(ji)(ji)術(shu)(shu)主要包括移(yi)動(dong)極板(ban)技(ji)(ji)術(shu)(shu)、低(di)低(di)溫(wen)(wen)技(ji)(ji)術(shu)(shu)、電袋復合式(shi)除(chu)(chu)塵(chen)技(ji)(ji)術(shu)(shu)和濕式(shi)靜電除(chu)(chu)塵(chen)技(ji)(ji)術(shu)(shu)。但在(zai)實際工業應(ying)用中(zhong)，移(yi)動(dong)極板(ban)技(ji)(ji)術(shu)(shu)陽極板(ban)機械結構過于復雜，制(zhi)作(zuo)、運(yun)行成本高(gao)(gao)，設備(bei)維護困難；低(di)低(di)溫(wen)(wen)電除(chu)(chu)塵(chen)器技(ji)(ji)術(shu)(shu)加裝(zhuang)熱交換(huan)裝(zhuang)置會帶(dai)來(lai)系(xi)統(tong)流(liu)體阻力增(zeng)加及設備(bei)占地面(mian)積增(zeng)加等問(wen)題，同時由于煙氣溫(wen)(wen)度降低(di)到酸結露以下，換(huan)熱器及電除(chu)(chu)塵(chen)器均存在(zai)酸腐蝕風險。

電袋(dai)復合式除塵技術在實際運行中難(nan)以處理高溫煙氣(qi)，易出(chu)現“燒袋(dai)”現象，且對鍋(guo)爐運行煙氣(qi)濕度(du)及含(han)氧量要求高，輔(fu)助系統復雜，故障率(lv)較高。

而WESP與常規(gui)的(de)DESP除(chu)塵(chen)原(yuan)理及結構基本相同(tong)，使用(yong)(yong)噴淋系統(tong)在收塵(chen)極形成水(shui)膜代替傳統(tong)DESP的(de)振打清(qing)灰系統(tong)，兼(jian)具DESP的(de)優(you)點且克(ke)服了反電(dian)(dian)暈和二次揚塵(chen)問題，結構簡(jian)單(dan)同(tong)時又沒(mei)有以上增(zeng)效(xiao)技術存在的(de)問題，具有很高的(de)除(chu)塵(chen)效(xiao)率(lv)，隨(sui)著火(huo)電(dian)(dian)廠大氣污(wu)染物(wu)排(pai)放標準的(de)日趨嚴格，濕式(shi)電(dian)(dian)除(chu)塵(chen)器(qi)在燃(ran)煤電(dian)(dian)站的(de)應用(yong)(yong)越(yue)來(lai)越(yue)廣泛(fan)，針(zhen)對濕靜電(dian)(dian)除(chu)塵(chen)器(qi)脫除(chu)微細顆粒的(de)問題近年學者也開展了大量的(de)研究。

用ELPI測試(shi)不同電(dian)場(chang)強度、停留時(shi)問(wen)、顆(ke)(ke)粒(li)(li)粒(li)(li)徑下(xia)微細(xi)顆(ke)(ke)粒(li)(li)在(zai)濕式電(dian)除(chu)塵器內的脫(tuo)(tuo)除(chu)效(xiao)率(lv)，研究發現(xian)，隨(sui)著停留時(shi)問(wen)增長，脫(tuo)(tuo)除(chu)效(xiao)率(lv)從(cong)57%上升(sheng)至(zhi)，隨(sui)著電(dian)場(chang)強度增大(da)，脫(tuo)(tuo)除(chu)效(xiao)率(lv)提高(gao)。同初始微細(xi)顆(ke)(ke)粒(li)(li)濃(nong)度對(dui)脫(tuo)(tuo)除(chu)效(xiao)率(lv)的影(ying)響(xiang)，隨(sui)著顆(ke)(ke)粒(li)(li)物(wu)初始濃(nong)度降低，脫(tuo)(tuo)除(chu)效(xiao)率(lv)有所下(xia)降，分(fen)級脫(tuo)(tuo)除(chu)效(xiao)率(lv)整體成U型分(fen)布。

新型濕式靜電除塵器，除(chu)(chu)塵(chen)器(qi)荷電(dian)(dian)(dian)區(qu)(qu)(qu)與(yu)收塵(chen)區(qu)(qu)(qu)分開，發現荷電(dian)(dian)(dian)區(qu)(qu)(qu)對(dui)細(xi)(xi)顆(ke)(ke)粒(li)(li)(li)(li)(li)物脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)為(wei)10%，提高(gao)(gao)(gao)荷電(dian)(dian)(dian)區(qu)(qu)(qu)與(yu)收塵(chen)區(qu)(qu)(qu)電(dian)(dian)(dian)壓及(ji)減少收塵(chen)區(qu)(qu)(qu)極問(wen)距均對(dui)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)應具(ju)有作(zuo)用，可高(gao)(gao)(gao)達99.7%。水(shui)膜(mo)對(dui)微細(xi)(xi)顆(ke)(ke)粒(li)(li)(li)(li)(li)靜電(dian)(dian)(dian)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)的(de)影響規律(lv)，結果表明粒(li)(li)(li)(li)(li)徑為(wei)0.5μm時的(de)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)較低，隨著(zhu)(zhu)(zhu)顆(ke)(ke)粒(li)(li)(li)(li)(li)直徑的(de)增大或(huo)減小(xiao)(xiao)，顆(ke)(ke)粒(li)(li)(li)(li)(li)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)都將增大。水(shui)膜(mo)能(neng)夠(gou)顯著(zhu)(zhu)(zhu)提高(gao)(gao)(gao)小(xiao)(xiao)顆(ke)(ke)粒(li)(li)(li)(li)(li)的(de)靜電(dian)(dian)(dian)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)，當顆(ke)(ke)粒(li)(li)(li)(li)(li)直徑小(xiao)(xiao)于O.lμm顆(ke)(ke)粒(li)(li)(li)(li)(li)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)提高(gao)(gao)(gao)約50%，對(dui)大顆(ke)(ke)粒(li)(li)(li)(li)(li)的(de)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)也有較顯著(zhu)(zhu)(zhu)的(de)作(zuo)用高(gao)(gao)(gao)約8%。以上(shang)研(yan)究，多(duo)為(wei)濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)器(qi)污(wu)染物脫(tuo)除(chu)(chu)宏觀效(xiao)(xiao)(xiao)率(lv)試驗(yan)，缺乏對(dui)于濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)器(qi)內部顆(ke)(ke)粒(li)(li)(li)(li)(li)的(de)分布(bu)、受力與(yu)運動特性(xing)等方面的(de)研(yan)究，而這對(dui)于優化(hua)濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)過程進一(yi)步提高(gao)(gao)(gao)微細(xi)(xi)顆(ke)(ke)粒(li)(li)(li)(li)(li)脫(tuo)除(chu)(chu)效(xiao)(xiao)(xiao)率(lv)至關重要。

通過ELPI對電除(chu)(chu)(chu)(chu)塵器(qi)除(chu)(chu)(chu)(chu)塵過程中微(wei)細顆(ke)(ke)粒(li)的(de)濃度分布進行實時測量(liang)，基于顆(ke)(ke)粒(li)濃度變化研究(jiu)分析了水(shui)(shui)膜(mo)對微(wei)細顆(ke)(ke)粒(li)在靜電除(chu)(chu)(chu)(chu)塵器(qi)內的(de)分布狀況、運動軌跡、沉積情況、分級(ji)效率(lv)及力學行為(wei)等的(de)影(ying)響，揭示水(shui)(shui)膜(mo)影(ying)響微(wei)細顆(ke)(ke)粒(li)脫除(chu)(chu)(chu)(chu)效率(lv)的(de)機理(li)，為(wei)濕(shi)式電除(chu)(chu)(chu)(chu)塵器(qi)脫除(chu)(chu)(chu)(chu)微(wei)細顆(ke)(ke)粒(li)奠定(ding)理(li)論基礎(chu)。

改進電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)結構　　在(zai)(zai)單(dan)區(qu)(qu)(qu)(qu)(qu)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)器(qi)(qi)中(zhong)(zhong)，粒子(zi)(zi)的(de)(de)(de)(de)(de)(de)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)捕集(ji)(ji)都在(zai)(zai)一個區(qu)(qu)(qu)(qu)(qu)內(nei)完成，而雙區(qu)(qu)(qu)(qu)(qu)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)器(qi)(qi)的(de)(de)(de)(de)(de)(de)粒子(zi)(zi)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)部分(fen)(fen)(fen)(fen)(fen)和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)部分(fen)(fen)(fen)(fen)(fen)是(shi)分(fen)(fen)(fen)(fen)(fen)開(kai)的(de)(de)(de)(de)(de)(de)。前(qian)區(qu)(qu)(qu)(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)在(zai)(zai)此區(qu)(qu)(qu)(qu)(qu)內(nei)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，后區(qu)(qu)(qu)(qu)(qu)安裝收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)極，粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)在(zai)(zai)此區(qu)(qu)(qu)(qu)(qu)內(nei)被捕集(ji)(ji)。雙區(qu)(qu)(qu)(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)技術是(shi)在(zai)(zai)末電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)中(zhong)(zhong)，將單(dan)一的(de)(de)(de)(de)(de)(de)高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)(chen)(chen)(chen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)(qu)(qu)(qu)和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)(qu)(qu)(qu)，并(bing)(bing)用不(bu)同(tong)的(de)(de)(de)(de)(de)(de)高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。根據需要，有所(suo)區(qu)(qu)(qu)(qu)(qu)別(bie)地向(xiang)這兩(liang)個區(qu)(qu)(qu)(qu)(qu)供(gong)(gong)應適宜的(de)(de)(de)(de)(de)(de)運行(xing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)其荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)功能(neng)。荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)(qu)(qu)(qu)主要是(shi)對粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)進行(xing)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)同(tong)時又(you)在(zai)(zai)陽極板上(shang)收(shou)(shou)集(ji)(ji)帶(dai)負電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)的(de)(de)(de)(de)(de)(de)粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)。收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)(qu)(qu)(qu)則使(shi)(shi)(shi)顆(ke)粒從(cong)煙氣中(zhong)(zhong)分(fen)(fen)(fen)(fen)(fen)離，將絕大部分(fen)(fen)(fen)(fen)(fen)的(de)(de)(de)(de)(de)(de)顆(ke)粒吸附到收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)板上(shang)；同(tong)一些帶(dai)正(zheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)的(de)(de)(de)(de)(de)(de)顆(ke)粒吸附至其陰極(又(you)稱輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極)。雙區(qu)(qu)(qu)(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)由于(yu)(yu)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)(qu)(qu)(qu)分(fen)(fen)(fen)(fen)(fen)開(kai)后，在(zai)(zai)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)區(qu)(qu)(qu)(qu)(qu)可以(yi)比(bi)較(jiao)靈活(huo)地調整電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，通過(guo)減小極間距(ju)，可以(yi)在(zai)(zai)較(jiao)低的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下能(neng)使(shi)(shi)(shi)塵(chen)(chen)(chen)(chen)(chen)(chen)粒充分(fen)(fen)(fen)(fen)(fen)地荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，運行(xing)也很。在(zai)(zai)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)區(qu)(qu)(qu)(qu)(qu)，可地提(ti)(ti)高(gao)收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)(de)(de)(de)(de)均勻性，有利于(yu)(yu)提(ti)(ti)效率。對雙區(qu)(qu)(qu)(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)驅進速(su)度(du)的(de)(de)(de)(de)(de)(de)提(ti)(ti)高(gao)系數研究(jiu)表明，為防止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)器(qi)(qi)發生反(fan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈問題并(bing)(bing)提(ti)(ti)效率，在(zai)(zai)末電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)采用雙區(qu)(qu)(qu)(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)結構，將粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)、收(shou)(shou)塵(chen)(chen)(chen)(chen)(chen)(chen)的(de)(de)(de)(de)(de)(de)過(guo)程及其電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備分(fen)(fen)(fen)(fen)(fen)開(kai)，使(shi)(shi)(shi)兩(liang)個區(qu)(qu)(qu)(qu)(qu)域的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣運行(xing)參數分(fen)(fen)(fen)(fen)(fen)別(bie)達(da)到較(jiao)佳(jia)化。通過(guo)實(shi)驗研究(jiu)表明，與傳(chuan)統臥式電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)(chen)器(qi)(qi)相比(bi)，雙區(qu)(qu)(qu)(qu)(qu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)可使(shi)(shi)(shi)粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)平(ping)均驅進速(su)度(du)提(ti)(ti)高(gao)20%左右(you)；除塵(chen)(chen)(chen)(chen)(chen)(chen)效率則隨(sui)之上(shang)升(sheng)，并(bing)(bing)將粉(fen)(fen)(fen)(fen)塵(chen)(chen)(chen)(chen)(chen)(chen)排放濃度(du)降低到50mg/m3以(yi)下。

　　{二}、靜電除塵器在實際(ji)使用過程

　　轉爐煉鋼一(yi)次除(chu)塵(chen)目前采用(yong)的除(chu)塵(chen)工(gong)藝主(zhu)要(yao)是濕(shi)法(fa)塔文(wen)OG系統和(he)干(gan)法(fa)LT系統。濕(shi)法(fa)除(chu)塵(chen)系統由于耗水(shui)量(liang)大、系統阻力大、能耗高、除(chu)塵(chen)效(xiao)率低(di)已經處于逐步淘汰階段(duan)；干(gan)法(fa)除(chu)塵(chen)系統主(zhu)要(yao)靠靜(jing)電除(chu)塵(chen)器進行精除(chu)塵(chen)，系統阻力小(xiao)、能耗低(di)、耗水(shui)量(liang)小(xiao)、除(chu)塵(chen)效(xiao)率較高，被新建(jian)及改造工(gong)程(cheng)廣泛采用(yong)。但靜(jing)電除(chu)塵(chen)器在(zai)實際使用(yong)過程(cheng)中(zhong)也暴露出以下問(wen)題。

(1)靜電除塵(chen)(chen)器配件往往設(she)備龐大，耗鋼多，同時對制造(zao)、安裝和操作水平的(de)要求都較高，價格昂貴；(2)靜電除塵(chen)(chen)器往往受(shou)到煙塵(chen)(chen)性(xing)質、濕度(du)(du)、溫度(du)(du)、成(cheng)分、壓力，以及粉塵(chen)(chen)濃(nong)度(du)(du)、粒徑分布(bu)、比電阻等多種(zhong)因素的(de)影響，使(shi)其實際的(de)除塵(chen)(chen)效率(lv)往往達不(bu)到設(she)計效率(lv)，并(bing)且波動(dong)較大；

(3)靜電(dian)(dian)(dian)除(chu)塵(chen)(chen)器對顆粒(如PM2.5)的(de)控(kong)制(zhi)效果較差，這(zhe)主要是由于這(zhe)個粒徑范圍內的(de)粉塵(chen)(chen)處于電(dian)(dian)(dian)場荷電(dian)(dian)(dian)和擴散荷電(dian)(dian)(dian)兩種荷電(dian)(dian)(dian)機制(zhi)之間，荷電(dian)(dian)(dian)效果較差；同時在(zai)電(dian)(dian)(dian)極振(zhen)打(da)時容易產(chan)生(sheng)二次飛(fei)揚的(de)現象，使(shi)已捕集的(de)粉塵(chen)(chen)從電(dian)(dian)(dian)除(chu)塵(chen)(chen)器逃逸。

袋式除(chu)塵(chen)(chen)器(qi)能夠克(ke)服靜電除(chu)塵(chen)(chen)器(qi)的(de)大部(bu)分缺點，特別(bie)是對(dui)于(yu)亞微米級(ji)的(de)粉塵(chen)(chen)有很好的(de)收(shou)集(ji)效果(guo)，但(dan)是受制于(yu)系(xi)統阻(zu)力大、不適宜(yi)于(yu)高(gao)溫(wen)、高(gao)濕、腐蝕性煙氣(qi)、不適宜(yi)于(yu)粘(zhan)結性強和吸(xi)濕性強的(de)粉塵(chen)(chen)、很換頻繁(fan)等因(yin)素，單獨將(jiang)其應用(yong)于(yu)轉爐一次除(chu)塵(chen)(chen)尚存在問(wen)題。

靜(jing)電布(bu)袋(dai)(dai)(dai)復(fu)合除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器是(shi)基于(yu)靜(jing)電除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)和(he)布(bu)袋(dai)(dai)(dai)除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)兩種成(cheng)熟的除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)理(li)論而提出的一(yi)種新型的除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)技(ji)術(shu)。它結合了靜(jing)電除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器和(he)布(bu)袋(dai)(dai)(dai)除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器的優點，除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)，既能滿足日趨嚴格的環保標(biao)準，又能增加運行性，降(jiang)低(di)除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)成(cheng)本。因此，將靜(jing)電布(bu)袋(dai)(dai)(dai)復(fu)合除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器應用(yong)于(yu)轉爐一(yi)次除(chu)(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)系統具有較好(hao)的應用(yong)前景和(he)現實(shi)意義。