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袋式除塵器維護檢修問題及氣箱脈沖噴吹系統

2020-05-10 19:43:18

[一]、大(da)氣環境污(wu)染源治理產業(ye)化管理
  大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)產(chan)(chan)業(ye)化(hua)管(guan)(guan)(guan)理(li)(li),需要(yao)(yao)采用(yong)(yong)相關企業(ye)聯合的(de)(de)(de)(de)方式,這樣(yang)可以對污(wu)氣(qi)(qi)中(zhong)揮(hui)發(fa)性及(ji)致臭(chou)污(wu)染物(wu)(wu)進(jin)(jin)(jin)行(xing)(xing)處(chu)理(li)(li),可以利用(yong)(yong)脫除技術與裝置,對物(wu)(wu)和致臭(chou)污(wu)染物(wu)(wu)進(jin)(jin)(jin)行(xing)(xing)研(yan)究(jiu)與設計,并將其(qi)處(chu)理(li)(li)實(shi)施產(chan)(chan)業(ye)化(hua)的(de)(de)(de)(de)生產(chan)(chan),在(zai)(zai)合作(zuo)(zuo)(zuo)過(guo)程(cheng)中(zhong)雙方共(gong)同(tong)商定(ding)大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)產(chan)(chan)業(ye)化(hua)的(de)(de)(de)(de)進(jin)(jin)(jin)度安排,要(yao)(yao)明確管(guan)(guan)(guan)理(li)(li)工(gong)(gong)作(zuo)(zuo)(zuo)的(de)(de)(de)(de)細節及(ji)完(wan)成(cheng)水平;對于大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)產(chan)(chan)業(ye)化(hua)的(de)(de)(de)(de)負責人(ren),要(yao)(yao)負責協調(diao)整(zheng)個(ge)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)進(jin)(jin)(jin)展(zhan)情(qing)況(kuang);在(zai)(zai)大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)產(chan)(chan)業(ye)化(hua)的(de)(de)(de)(de)過(guo)程(cheng)中(zhong),雙方要(yao)(yao)共(gong)同(tong)組(zu)(zu)建專(zhuan)家組(zu)(zu),共(gong)同(tong)進(jin)(jin)(jin)行(xing)(xing)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)進(jin)(jin)(jin)度的(de)(de)(de)(de)考核(he);對于項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)考核(he)工(gong)(gong)作(zuo)(zuo)(zuo),要(yao)(yao)定(ding)期(qi)總結(jie),這樣(yang)可以按(an)期(qi)完(wan)成(cheng)工(gong)(gong)作(zuo)(zuo)(zuo)目(mu)(mu)(mu)(mu)(mu)標(biao)(biao);在(zai)(zai)大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)產(chan)(chan)業(ye)化(hua)的(de)(de)(de)(de)過(guo)程(cheng)中(zhong),要(yao)(yao)根據實(shi)際情(qing)況(kuang)需要(yao)(yao)以及(ji)雙方研(yan)究(jiu)工(gong)(gong)作(zuo)(zuo)(zuo)基礎,按(an)課題(ti)(ti)主要(yao)(yao)研(yan)究(jiu)內容(rong)進(jin)(jin)(jin)行(xing)(xing)分工(gong)(gong),按(an)計劃(hua)完(wan)成(cheng)。為了避免出現(xian)脫期(qi)情(qing)況(kuang),使(shi)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)按(an)照計劃(hua)實(shi)施,提高工(gong)(gong)作(zuo)(zuo)(zuo)效率,專(zhuan)門成(cheng)立“大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)的(de)(de)(de)(de)技術與應用(yong)(yong)”工(gong)(gong)作(zuo)(zuo)(zuo)小(xiao)組(zu)(zu),具(ju)體的(de)(de)(de)(de)指導(dao)原則是:要(yao)(yao)將工(gong)(gong)作(zuo)(zuo)(zuo)目(mu)(mu)(mu)(mu)(mu)標(biao)(biao)逐項(xiang)(xiang)細化(hua),分解落實(shi)到(dao)各(ge)個(ge)崗位(wei),將項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)目(mu)(mu)(mu)(mu)(mu)標(biao)(biao)變為崗位(wei)目(mu)(mu)(mu)(mu)(mu)標(biao)(biao)和崗位(wei)年度工(gong)(gong)作(zuo)(zuo)(zuo)內容(rong);對于大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)管(guan)(guan)(guan)理(li)(li),要(yao)(yao)緊跟管(guan)(guan)(guan)理(li)(li)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)經費使(shi)用(yong)(yong)情(qing)況(kuang),在(zai)(zai)管(guan)(guan)(guan)理(li)(li)過(guo)程(cheng)中(zhong)要(yao)(yao)及(ji)時發(fa)現(xian)和改正存在(zai)(zai)問題(ti)(ti),要(yao)(yao)及(ji)時發(fa)現(xian)問題(ti)(ti),及(ji)時解決問題(ti)(ti);對于大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu),要(yao)(yao)認真組(zu)(zu)織項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)人(ren)員,使(shi)他們及(ji)時清理(li)(li)完(wan)成(cheng)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu),要(yao)(yao)將大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)工(gong)(gong)作(zuo)(zuo)(zuo)建立質量監控(kong)項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu),隨時跟蹤項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)發(fa)展(zhan),并且要(yao)(yao)求規劃(hua)部署項(xiang)(xiang)目(mu)(mu)(mu)(mu)(mu)的(de)(de)(de)(de)結(jie)題(ti)(ti)收尾工(gong)(gong)作(zuo)(zuo)(zuo),使(shi)大(da)(da)(da)(da)(da)氣(qi)(qi)環境(jing)(jing)(jing)污(wu)染源(yuan)(yuan)(yuan)治(zhi)理(li)(li)管(guan)(guan)(guan)理(li)(li)做到(dao)滿(man)意、企業(ye)滿(man)意、普通職(zhi)工(gong)(gong)滿(man)意的(de)(de)(de)(de)狀態。
  [二]、鍋爐布袋除塵器維(wei)護和檢修應注意的問題
  鍋爐布袋除塵器和有(you)關設備(bei)作為一個除塵系統,在(zai)維護方面有(you)一些特別需(xu)要注(zhu)意的地方。
  布(bu)袋除(chu)塵器如果長期(qi)停用,采取保養措施,以防(fang)布(bu)袋受潮、板結和腐蝕,同時關(guan)閉除(chu)塵器所有進(jin)出口閥門。在停機期(qi)間(jian)按規(gui)定(ding)的(de)時間(jian)間(jian)隔(ge)打(da)開(kai)進(jin)出口閥門,利用煙囪自然通(tong)風4h,或打(da)開(kai)電加(jia)熱器加(jia)熱8h,以驅(qu)除(chu)除(chu)塵器內潮氣,保持干燥(zao)。
  鍋爐布袋收塵器停機時,如果停機時間短(duan),不應(ying)為濾袋清灰(hui),應(ying)注意除塵器的(de)(de)保溫,如果停機時間長,則(ze)應(ying)為所有濾袋清灰(hui),并利(li)用引(yin)風機把(ba)袋式除塵器內的(de)(de)殘(can)留(liu)酸性氣(qi)體干凈。
  (1)除塵(chen)器要(yao)設專人操作和(he)(he)檢修(xiu)。轉動部(bu)位定期注油(you)。掌握除塵(chen)器的性能和(he)(he)構造,發現(xian)問題及(ji)時處理,除塵(chen)系(xi)統正常運(yun)轉。值班人員(yuan)要(yao)記錄當班運(yun)行情況及(ji)有關(guan)數據。如果發現(xian)排氣口冒煙冒灰(hui)(hui),表明(ming)已有濾(lv)袋(dai)破漏,檢修(xiu)時,逐(zhu)室停風(feng)打開(kai)上(shang)蓋,如發現(xian)袋(dai)口處有積灰(hui)(hui),則說明(ming)該濾(lv)袋(dai)已破損,須更換或修(xiu)補(bu)。
  (2)除塵器阻(zu)力一般在1200~1500Pa,清灰(hui)周期根據阻(zu)力情況用(yong)控制柜(ju)內的設定開關進行(xing)調整(zheng)。
  (3)壓縮空氣(qi)系(xi)統(tong)的空氣(qi)過濾器(qi)要定時排(pai)污,氣(qi)包排(pai)水(shui)閥要定期排(pai)水(shui)。有貯(zhu)氣(qi)罐的也要定時排(pai)水(shui)。
  (4)控制(zhi)閥(fa)要由人員(yuan)檢修,定期對電磁閥(fa)和脈沖閥(fa)進行(xing)檢查。
  (5)鍋爐啟動時主(zhu)要依靠(kao)燃油(you),因爐內溫(wen)度低(di),煙氣、除塵(chen)器(qi)和(he)管(guan)道(dao)溫(wen)度也低(di),而(er)油(you)霧含量較高,容易產生(sheng)結露。其防范措施(shi)有兩(liang)種:
  一種(zhong)是采用旁路(lu)煙(yan)道,煙(yan)氣(qi)不經(jing)鍋爐(lu)除塵器直接進入(ru)引(yin)風機前(qian)聯箱,待鍋爐(lu)斷油(you)或燃煤(mei)粉(fen)+燃油(you)達到較高負荷、煙(yan)氣(qi)達到溫度(du)時逐步關閉旁路(lu)風門,經(jing)布袋除塵器進入(ru)正常運行。
  另一種是不設(she)旁路煙道,鍋爐(lu)啟(qi)動(dong)前先向(xiang)布袋除塵器噴入粉(fen)煤灰,不進行(xing)反吹清(qing)塵,使(shi)濾料表面附著一層粉(fen)塵。這樣,防止煙氣中的(de)油霧直接(jie)同濾袋接(jie)觸,避免對濾袋造成(cheng)損害。
  [三]、氣(qi)箱脈沖除(chu)塵器(qi)的噴吹系統(tong)
  氣箱(xiang)脈沖布袋除塵器的(de)(de)噴(pen)(pen)吹(chui)(chui)系統主要(yao)是(shi)電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa)、脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)控制儀、噴(pen)(pen)吹(chui)(chui)管(guan)氣(qi)(qi)包等(deng)方面構成。氣(qi)(qi)包金屬管(guan)聯(lian)接于(yu)電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa)的(de)(de)輸(shu)(shu)入端(duan),而(er)電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa)的(de)(de)輸(shu)(shu)出(chu)(chu)端(duan)又連接于(yu)噴(pen)(pen)吹(chui)(chui)管(guan)。等(deng)到(dao)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)控制儀出(chu)(chu)現了(le)信號(hao)指令,電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa)便(bian)會(hui)銜鐵吸合,將氣(qi)(qi)塞頂開(kai)。A氣(qi)(qi)室(shi)(shi)內(nei)的(de)(de)空氣(qi)(qi)壓力將膜(mo)片(pian)頂開(kai),B氣(qi)(qi)室(shi)(shi)之內(nei)的(de)(de)儲氣(qi)(qi)也在此刻放出(chu)(chu)。開(kai)啟了(le)電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa),輸(shu)(shu)出(chu)(chu)口的(de)(de)壓縮空氣(qi)(qi)就會(hui)進去噴(pen)(pen)氣(qi)(qi)管(guan)內(nei)。消失了(le)指令信號(hao),電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)波便(bian)將銜鐵返回,放松撞桿(gan),復位(wei)氣(qi)(qi)塞。而(er)就在這時(shi),B氣(qi)(qi)室(shi)(shi)出(chu)(chu)現的(de)(de)壓力又緊壓住膜(mo)片(pian),壓在了(le)輸(shu)(shu)出(chu)(chu)口之上。關閉了(le)電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa),電(dian)磁(ci)(ci)(ci)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)閥(fa)從開(kai)啟到(dao)了(le)閉合,形成了(le)一(yi)次的(de)(de)氣(qi)(qi)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)。布袋除塵器濾袋便(bian)會(hui)產生下壓脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong),實現了(le)清(qing)灰的(de)(de)目的(de)(de)。
  其中(zhong),脈沖(chong)的(de)(de)寬度為濾袋噴(pen)吹(chui)時間(jian)(jian)(jian)。脈沖(chong)間(jian)(jian)(jian)隔(ge)是相(xiang)鄰的(de)(de)兩排濾袋在間(jian)(jian)(jian)隔(ge)時間(jian)(jian)(jian)內的(de)(de)噴(pen)吹(chui)。脈沖(chong)周期則(ze)是指(zhi)對一排濾袋所噴(pen)吹(chui)時間(jian)(jian)(jian),也稱(cheng)之(zhi)為噴(pen)吹(chui)的(de)(de)周期。無論是脈沖(chong)的(de)(de)寬度、脈沖(chong)間(jian)(jian)(jian)隔(ge)還是噴(pen)吹(chui)周期,都(dou)需要脈沖(chong)控制(zhi)儀自(zi)動進行(xing)控制(zhi)廠(chang)。

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