工作原理
(1)預分離:立窯排出的(de)含(han)塵(chen)(chen)(chen)(chen)氣(qi)體(ti)經煙(yan)道(dao)進入布袋除(chu)塵(chen)(chen)(chen)(chen)器中(zhong)心的(de)進氣(qi)總管,在除(chu)塵(chen)(chen)(chen)(chen)系(xi)統引風機產生(sheng)負壓(ya)作用下在灰斗中(zhong)心上方均勻進入除(chu)塵(chen)(chen)(chen)(chen)器的(de)各個袋子室,含(han)塵(chen)(chen)(chen)(chen)煙(yan)氣(qi)中(zhong)的(de)粗顆粒(li)粉塵(chen)(chen)(chen)(chen)由于導流板的(de)攔阻及自身重(zhong)力的(de)作用直接落入灰斗,完成粉塵(chen)(chen)(chen)(chen)的(de)預分離(li)。
(2)過濾:含(han)塵(chen)氣(qi)(qi)體(ti)經花板孔(kong)進(jin)(jin)入(ru)濾(lv)(lv)(lv)袋,粉塵(chen)被截留在濾(lv)(lv)(lv)袋內表面,含(han)塵(chen)氣(qi)(qi)體(ti)則經濾(lv)(lv)(lv)袋過(guo)濾(lv)(lv)(lv)得(de)到凈化(hua),凈化(hua)后(hou)的(de)(de)氣(qi)(qi)體(ti)進(jin)(jin)入(ru)袋室,然后(hou)經由提(ti)升(sheng)切換閥(fa)(fa)排氣(qi)(qi)通(tong)道(dao)、出(chu)氣(qi)(qi)管道(dao),由排風(feng)機排入(ru)大氣(qi)(qi)。該(gai)除塵(chen)器(qi)(qi)(qi)為(wei)頂(ding)部出(chu)風(feng),負壓(ya)(ya)操作(zuo)(zuo)內濾(lv)(lv)(lv)式(shi)除塵(chen)器(qi)(qi)(qi)。清(qing)(qing)灰(hui)(hui)(hui)方(fang)式(shi)可分(fen)為(wei)定(ding)時(shi)間、定(ding)阻(zu)力兩種方(fang)法。定(ding)時(shi)清(qing)(qing)灰(hui)(hui)(hui)是(shi)按時(shi)間程序,各室根據(ju)可調(diao)時(shi)間參數自(zi)動進(jin)(jin)行輪流清(qing)(qing)灰(hui)(hui)(hui),除塵(chen)器(qi)(qi)(qi)清(qing)(qing)灰(hui)(hui)(hui)周(zhou)期為(wei)0~2.5小時(shi)內分(fen)六(liu)檔(dang)可調(diao),每室清(qing)(qing)灰(hui)(hui)(hui)時(shi)間為(wei)10秒(miao)~3秒(miao)分(fen)鐘六(liu)檔(dang)選(xuan)擇。定(ding)時(shi)清(qing)(qing)灰(hui)(hui)(hui)控(kong)(kong)(kong)制(zhi)(zhi)則是(shi)對除塵(chen)器(qi)(qi)(qi)的(de)(de)進(jin)(jin)、出(chu)壓(ya)(ya)差(cha)取樣,通(tong)過(guo)差(cha)壓(ya)(ya)變送(song)器(qi)(qi)(qi)轉換成電訊號來實行清(qing)(qing)灰(hui)(hui)(hui)的(de)(de),工(gong)作(zuo)(zuo)過(guo)程如(ru)(ru)下:進(jin)(jin)、出(chu)風(feng)口(kou)取壓(ya)(ya)裝置差(cha)壓(ya)(ya)變送(song)器(qi)(qi)(qi)清(qing)(qing)灰(hui)(hui)(hui)控(kong)(kong)(kong)制(zhi)(zhi)器(qi)(qi)(qi)繼電器(qi)(qi)(qi)電磁閥(fa)(fa)氣(qi)(qi)缸提(ti)升(sheng)切換閥(fa)(fa)除上述兩種控(kong)(kong)(kong)制(zhi)(zhi)方(fang)法外,還設置有手動控(kong)(kong)(kong)制(zhi)(zhi)機構,可人(ren)工(gong)進(jin)(jin)行正常清(qing)(qing)灰(hui)(hui)(hui)控(kong)(kong)(kong)制(zhi)(zhi)。為(wei)操作(zuo)(zuo)管理方(fang)便,建議采用定(ding)時(shi)清(qing)(qing)灰(hui)(hui)(hui)方(fang)法。四(si)、溫度控(kong)(kong)(kong)制(zhi)(zhi)立窯煙氣(qi)(qi)溫度一般在60-300°范圍內波動,煙氣(qi)(qi)含(han)濕(shi)量在4-12%范圍內波動,為(wei)了防止除塵(chen)器(qi)(qi)(qi)的(de)(de)結露糊袋及(ji)由于溫度過(guo)高發生燒(shao)袋等惡性(xing)事故的(de)(de)發生,在該(gai)除塵(chen)器(qi)(qi)(qi)系統中采取如(ru)(ru)下措(cuo)施:
(一)在除(chu)塵器>的進氣管道、本體及(ji)灰斗(dou)等(deng)處必須要采取(qu)保溫措施,以防(fang)止除(chu)塵器的結露。
(二)在(zai)除(chu)塵器的(de)進氣(qi)口(kou)(kou),排氣(qi)口(kou)(kou)等(deng)處(chu)安裝(zhuang)有溫(wen)度檢測與自動報警裝(zhuang)置(zhi),并(bing)(bing)在(zai)進氣(qi)口(kou)(kou)安裝(zhuang)冷風進入裝(zhuang)置(zhi)。煙氣(qi)一(yi)旦超過(guo)袋(dai)除(chu)塵的(de)使用溫(wen)度范圍,則發生警報并(bing)(bing)自動采取溫(wen)控措施,以確(que)保除(chu)塵器安全運行。
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