脈沖式布袋除塵器原理是什么?為什么要用到空壓(ya)機?配(pei)額空壓(ya)機如何(he)選擇?配(pei)套(tao)空壓(ya)機氣(qi)量怎(zen)么計(ji)算?
脈(mo)沖(chong)式(shi)布(bu)(bu)袋(dai)除塵(chen)(chen)器(qi)是(shi)利用(yong)高壓電(dian)產生靜電(dian)吸力和布(bu)(bu)袋(dai)本身的(de)阻力,將(jiang)煙氣(qi)當中的(de)灰(hui)塵(chen)(chen)粒(li)子吸附到布(bu)(bu)袋(dai),再通過(guo)布(bu)(bu)袋(dai)的(de)褶皺展開時產生的(de)震動力,將(jiang)收集到的(de)顆粒(li)粉(fen)塵(chen)(chen)通過(guo)重力作(zuo)用(yong)掉(diao)落(luo)到料斗中,這樣就將(jiang)灰(hui)塵(chen)(chen)掉(diao)了。就是(shi)人們(men)常說的(de)螺桿空壓機對布(bu)(bu)袋(dai)除塵(chen)(chen)器(qi)提供反吹用(yong)空氣(qi)源,實現(xian)設備的(de)脈(mo)沖(chong)反吹功(gong)能(neng),設備正常運行(xing)。
布袋除(chu)塵(chen)(chen)(chen)器(qi)壓(ya)(ya)縮空氣(qi)(qi)(qi)消(xiao)耗量(liang)計(ji)(ji)(ji)算(suan)(suan)(suan)(suan)方法,脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)消(xiao)耗量(liang)+閥(fa)(fa)(fa)(fa)(fa)消(xiao)耗量(liang)(按(an)照工(gong)作(zuo)機制,取(qu)用(yong)氣(qi)(qi)(qi)值),壓(ya)(ya)縮空氣(qi)(qi)(qi)消(xiao)耗量(liang)用(yong)于提交給業主對(dui)空壓(ya)(ya)機系(xi)(xi)統進(jin)行選型。閥(fa)(fa)(fa)(fa)(fa)消(xiao)耗量(liang)在“在線清灰”下(xia)很(hen)小,本帖不(bu)進(jin)行計(ji)(ji)(ji)算(suan)(suan)(suan)(suan)討論;主要壓(ya)(ya)縮空氣(qi)(qi)(qi)消(xiao)耗量(liang)是(shi)(shi)(shi)(shi)電磁脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)清灰用(yong)氣(qi)(qi)(qi),見(jian)到(dao)(dao)計(ji)(ji)(ji)算(suan)(suan)(suan)(suan)公式(shi):耗氣(qi)(qi)(qi)量(liang)L=1.5*n*Q/T (其(qi)中1.5是(shi)(shi)(shi)(shi)裕量(liang)、n是(shi)(shi)(shi)(shi)單臺除(chu)塵(chen)(chen)(chen)器(qi)脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)設計(ji)(ji)(ji)總(zong)數(shu)量(liang)、Q是(shi)(shi)(shi)(shi)單只閥(fa)(fa)(fa)(fa)(fa)單次噴(pen)(pen)(pen)(pen)吹(chui)(chui)氣(qi)(qi)(qi)量(liang)、T是(shi)(shi)(shi)(shi)噴(pen)(pen)(pen)(pen)吹(chui)(chui)周期(qi)(qi)(qi)(qi))Q 每(mei)個(ge)(ge)脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)制造(zao)廠(chang)家的(de)(de)數(shu)據(ju)一(yi)樣(yang),論壇(tan)有(you)(you)(you)見(jian)過(guo)(guo)說3寸淹沒(mei)式(shi)單閥(fa)(fa)(fa)(fa)(fa)單次噴(pen)(pen)(pen)(pen)吹(chui)(chui)氣(qi)(qi)(qi)量(liang)250-300升(sheng)(沒(mei)注明噴(pen)(pen)(pen)(pen)吹(chui)(chui)壓(ya)(ya)力(li)(li)、膜片開啟時間(jian)),廠(chang)家樣(yang)品冊標注:3寸淹沒(mei)式(shi)閥(fa)(fa)(fa)(fa)(fa)0.3-0.35MPa噴(pen)(pen)(pen)(pen)吹(chui)(chui)壓(ya)(ya)力(li)(li)下(xia),噴(pen)(pen)(pen)(pen)吹(chui)(chui)時間(jian)0.1ms,單閥(fa)(fa)(fa)(fa)(fa)單次噴(pen)(pen)(pen)(pen)吹(chui)(chui)氣(qi)(qi)(qi)量(liang)450升(sheng),同(tong)等(deng)條件下(xia)達到(dao)(dao)480升(sheng)的(de)(de)(氣(qi)(qi)(qi)包設計(ji)(ji)(ji)的(de)(de)的(de)(de)情況);其(qi)次T-噴(pen)(pen)(pen)(pen)吹(chui)(chui)周期(qi)(qi)(qi)(qi)有(you)(you)(you)的(de)(de)資(zi)料是(shi)(shi)(shi)(shi)直接寫了(le)除(chu)塵(chen)(chen)(chen)器(qi)入(ru)口(kou)粉(fen)(fen)塵(chen)(chen)(chen)濃度(du)達到(dao)(dao)多少(shao)就(jiu)按(an)照多少(shao)min來估算(suan)(suan)(suan)(suan),有(you)(you)(you)的(de)(de)書本則寫的(de)(de)是(shi)(shi)(shi)(shi)依(yi)據(ju)除(chu)塵(chen)(chen)(chen)器(qi)阻(zu)(zu)(zu)(zu)力(li)(li)值反(fan)算(suan)(suan)(suan)(suan)噴(pen)(pen)(pen)(pen)吹(chui)(chui)周期(qi)(qi)(qi)(qi)T,反(fan)算(suan)(suan)(suan)(suan)的(de)(de)情況下(xia),阻(zu)(zu)(zu)(zu)力(li)(li)分為(wei)干(gan)凈濾(lv)袋和(he)除(chu)塵(chen)(chen)(chen)器(qi)結(jie)構(gou)阻(zu)(zu)(zu)(zu)力(li)(li),基(ji)本算(suan)(suan)(suan)(suan)是(shi)(shi)(shi)(shi)個(ge)(ge)定值(有(you)(you)(you)的(de)(de)建議(yi)取(qu)125Pa左右,有(you)(you)(you)的(de)(de)是(shi)(shi)(shi)(shi)300多Pa);另一(yi)部分阻(zu)(zu)(zu)(zu)力(li)(li)就(jiu)是(shi)(shi)(shi)(shi)吸附在濾(lv)袋表面的(de)(de)粉(fen)(fen)塵(chen)(chen)(chen)阻(zu)(zu)(zu)(zu)力(li)(li),計(ji)(ji)(ji)算(suan)(suan)(suan)(suan)公式(shi)比(bi)較單一(yi),但是(shi)(shi)(shi)(shi)參數(shu)取(qu)值沒(mei)有(you)(you)(you)出處,P阻(zu)(zu)(zu)(zu)力(li)(li)值=粉(fen)(fen)塵(chen)(chen)(chen)比(bi)阻(zu)(zu)(zu)(zu)力(li)(li)系(xi)(xi)數(shu)*過(guo)(guo)濾(lv)速(su)(su)度(du)*過(guo)(guo)濾(lv)速(su)(su)度(du)*煙氣(qi)(qi)(qi)粉(fen)(fen)塵(chen)(chen)(chen)濃度(du)*周期(qi)(qi)(qi)(qi),此(ci)周期(qi)(qi)(qi)(qi)我認為(wei)則可作(zuo)為(wei)脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)噴(pen)(pen)(pen)(pen)吹(chui)(chui)周期(qi)(qi)(qi)(qi)T,系(xi)(xi)統壓(ya)(ya)差達到(dao)(dao)1200Pa進(jin)行噴(pen)(pen)(pen)(pen)吹(chui)(chui)清灰,反(fan)算(suan)(suan)(suan)(suan)的(de)(de)周期(qi)(qi)(qi)(qi)T即(ji)作(zuo)為(wei)脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)噴(pen)(pen)(pen)(pen)吹(chui)(chui)周期(qi)(qi)(qi)(qi)來計(ji)(ji)(ji)算(suan)(suan)(suan)(suan)電磁脈(mo)沖(chong)閥(fa)(fa)(fa)(fa)(fa)耗氣(qi)(qi)(qi)量(liang)L。此(ci)處對(dui)于粉(fen)(fen)塵(chen)(chen)(chen)比(bi)阻(zu)(zu)(zu)(zu)力(li)(li)系(xi)(xi)數(shu)取(qu)值就(jiu)很(hen)難取(qu)了(le),不(bu)同(tong)工(gong)況下(xia)取(qu)值都是(shi)(shi)(shi)(shi)不(bu)一(yi)樣(yang)的(de)(de),而且這個(ge)(ge)值沒(mei)有(you)(you)(you)依(yi)據(ju)可查。
應根據含(han)(han)塵(chen)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)的溫(wen)(wen)度(du)(du)、含(han)(han)水(shui)(shui)份(fen)量(liang)、酸(suan)、堿性(xing)質(zhi)(zhi)、粉塵(chen)的粘度(du)(du)、濃(nong)度(du)(du)和磨啄(zhuo)性(xing)等高(gao)低、大小(xiao)(xiao)來考慮。 脈沖式布(bu)袋除(chu)塵(chen)器一般在含(han)(han)水(shui)(shui)量(liang)較小(xiao)(xiao),無(wu)酸(suan)性(xing)時(shi)(shi)根據含(han)(han)塵(chen)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)溫(wen)(wen)度(du)(du)來選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong),常溫(wen)(wen)或(huo)≤130°C時(shi)(shi),常用(yong)(yong)(yong)(yong)500~550g/m2的滌綸針(zhen)(zhen)刺(ci)氈(zhan)。<250°C時(shi)(shi),選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)芳綸諾梅克斯針(zhen)(zhen)刺(ci)氈(zhan)或(huo)800g/m2玻(bo)(bo)纖(xian)針(zhen)(zhen)刺(ci)氈(zhan)或(huo)800g/m2緯雙重(zhong)玻(bo)(bo)纖(xian)織(zhi)物或(huo)氟美斯[FMS]高(gao)溫(wen)(wen)濾料(含(han)(han)氟氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)不能用(yong)(yong)(yong)(yong)玻(bo)(bo)纖(xian)材質(zhi)(zhi))。 當(dang)(dang)含(han)(han)水(shui)(shui)份(fen)量(liang)較大,粉塵(chen)濃(nong)度(du)(du)又(you)較大時(shi)(shi),宜(yi)選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)防水(shui)(shui)、防油濾料(或(huo)稱(cheng)抗結露濾料)或(huo)覆膜濾料(基布(bu)應是經過(guo)防水(shui)(shui)處理(li)的針(zhen)(zhen)刺(ci)氈(zhan))。當(dang)(dang)含(han)(han)塵(chen)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)含(han)(han)酸(suan)、堿性(xing)且氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)溫(wen)(wen)度(du)(du)≤190°C,常選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)萊通(Ryton聚苯硫醚(mi))針(zhen)(zhen)刺(ci)氈(zhan)。氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)溫(wen)(wen)度(du)(du)≤240°C,耐(nai)酸(suan)堿性(xing)要求(qiu)不太高(gao)時(shi)(shi),選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)P84(聚酰亞(ya)胺)針(zhen)(zhen)刺(ci)氈(zhan)。 當(dang)(dang)含(han)(han)塵(chen)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)為易(yi)燃易(yi)爆(bao)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)時(shi)(shi),選(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)絳綸針(zhen)(zhen)刺(ci)氈(zhan),當(dang)(dang)含(han)(han)塵(chen)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)既有的水(shui)(shui)份(fen)又(you)為易(yi)燃易(yi)爆(bao)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)(ti)時(shi)(shi),