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通(tong)風(feng)(feng)(feng)(feng)、空調設(she)(she)備(bei)(bei)(bei)防(fang)(fang)火(huo)防(fang)(fang)爆(bao)措施1、空氣中(zhong)(zhong)含有(you)容(rong)易(yi)起(qi)火(huo)或(huo)爆(bao)炸物質(zhi)的(de)(de)房間(jian),其送、排(pai)(pai)風(feng)(feng)(feng)(feng)系統(tong)應(ying)(ying)采(cai)(cai)用(yong)防(fang)(fang)爆(bao)型(xing)的(de)(de)通(tong)風(feng)(feng)(feng)(feng)設(she)(she)備(bei)(bei)(bei)和(he)不會產生火(huo)花(hua)(hua)的(de)(de)材(cai)料(liao)(如可采(cai)(cai)用(yong)有(you)色(se)金(jin)屬制造的(de)(de)風(feng)(feng)(feng)(feng)機(ji)葉片和(he)防(fang)(fang)爆(bao)電動機(ji))。當送風(feng)(feng)(feng)(feng)機(ji)布(bu)(bu)置(zhi)(zhi)在(zai)單獨分隔(ge)的(de)(de)通(tong)風(feng)(feng)(feng)(feng)機(ji)房內(nei),且(qie)送風(feng)(feng)(feng)(feng)干(gan)管(guan)(guan)上設(she)(she)置(zhi)(zhi)防(fang)(fang)止回流設(she)(she)施時(shi),可采(cai)(cai)用(yong)普通(tong)型(xing)通(tong)風(feng)(feng)(feng)(feng)設(she)(she)備(bei)(bei)(bei)。2、含有(you)易(yi)燃(ran)(ran)、易(yi)爆(bao)粉(fen)塵(chen)(chen)(碎屑)的(de)(de)空氣,在(zai)進入(ru)排(pai)(pai)風(feng)(feng)(feng)(feng)機(ji)前應(ying)(ying)采(cai)(cai)用(yong)不產生火(huo)花(hua)(hua)的(de)(de)除(chu)塵(chen)(chen)器(qi)進行處理,以(yi)(yi)防(fang)(fang)止除(chu)塵(chen)(chen)器(qi)工作過程中(zhong)(zhong)產生火(huo)花(hua)(hua)引起(qi)粉(fen)塵(chen)(chen)、碎屑燃(ran)(ran)燒(shao)或(huo)爆(bao)炸。對于遇濕(shi)可能(neng)爆(bao)炸的(de)(de)粉(fen)塵(chen)(chen)(如電石、鋅粉(fen)、鋁(lv)鎂合(he)金(jin)粉(fen)等(deng)),嚴(yan)禁采(cai)(cai)用(yong)濕(shi)式(shi)除(chu)塵(chen)(chen)器(qi)。3、排(pai)(pai)除(chu)、輸(shu)送有(you)燃(ran)(ran)燒(shao)、爆(bao)炸危險的(de)(de)氣體(ti)、蒸氣和(he)粉(fen)塵(chen)(chen)的(de)(de)排(pai)(pai)風(feng)(feng)(feng)(feng)系統(tong),應(ying)(ying)采(cai)(cai)用(yong)不燃(ran)(ran)材(cai)料(liao)并設(she)(she)有(you)導(dao)除(chu)靜(jing)電的(de)(de)接地(di)裝置(zhi)(zhi)。其排(pai)(pai)風(feng)(feng)(feng)(feng)設(she)(she)備(bei)(bei)(bei)不應(ying)(ying)布(bu)(bu)置(zhi)(zhi)在(zai)地(di)下(xia)(xia)、半地(di)下(xia)(xia)建(jian)筑(室)內(nei),以(yi)(yi)防(fang)(fang)止有(you)爆(bao)炸危險的(de)(de)蒸氣和(he)粉(fen)塵(chen)(chen)等(deng)物質(zhi)的(de)(de)積聚。4、排(pai)(pai)除(chu)、輸(shu)送溫(wen)(wen)度(du)超(chao)過80℃的(de)(de)空氣或(huo)其他(ta)氣體(ti)以(yi)(yi)及容(rong)易(yi)起(qi)火(huo)的(de)(de)碎屑的(de)(de)管(guan)(guan)道,與可燃(ran)(ran)或(huo)難燃(ran)(ran)物體(ti)之間(jian)應(ying)(ying)保持不小于150mm的(de)(de)間(jian)隙,或(huo)采(cai)(cai)用(yong)厚度(du)不小于50mm的(de)(de)不燃(ran)(ran)材(cai)料(liao)隔(ge)熱,以(yi)(yi)防(fang)(fang)止填塞物與構件因(yin)受這些(xie)高溫(wen)(wen)管(guan)(guan)道的(de)(de)影響而導(dao)致火(huo)災。當管(guan)(guan)道互為上下(xia)(xia)布(bu)(bu)置(zhi)(zhi)時(shi),表面(mian)溫(wen)(wen)度(du)較高者應(ying)(ying)布(bu)(bu)置(zhi)(zhi)在(zai)上面(mian)。
1、70℃防火(huo)(huo)(huo)閥(fa)用在空調送風(feng)、通風(feng)系統(tong)管道上;平(ping)時常(chang)(chang)開(kai),發生火(huo)(huo)(huo)災時關(guan)(guan)閉(bi),聯鎖(suo)風(feng)機,使風(feng)機關(guan)(guan)閉(bi);2、280℃防火(huo)(huo)(huo)閥(fa)用在排(pai)煙(yan)(yan)系統(tong)管道上,平(ping)時常(chang)(chang)開(kai),發生火(huo)(huo)(huo)災時排(pai)煙(yan)(yan),當(dang)(dang)煙(yan)(yan)氣溫度(du)(du)(du)達到(dao)280度(du)(du)(du)時,防火(huo)(huo)(huo)閥(fa)關(guan)(guan)閉(bi),聯鎖(suo)風(feng)機關(guan)(guan)閉(bi);3、280℃防火(huo)(huo)(huo)閥(fa)應(ying)為(wei)常(chang)(chang)開(kai),又叫高(gao)溫防火(huo)(huo)(huo)閥(fa),一般安(an)裝(zhuang)在有高(gao)溫環境的通風(feng)管道中(zhong),當(dang)(dang)溫度(du)(du)(du)到(dao)達280℃后(hou)易熔合(he)金熔化,閥(fa)門(men)(men)關(guan)(guan)閉(bi),同時可以用24V電信號(hao)控(kong)制。如(ru)果說是280排(pai)煙(yan)(yan)防火(huo)(huo)(huo)閥(fa)應(ying)為(wei)常(chang)(chang)閉(bi),安(an)裝(zhuang)在排(pai)煙(yan)(yan)管道中(zhong)發生火(huo)(huo)(huo)災時控(kong)制中(zhong)心給(gei)出(chu)電信號(hao)使其打開(kai)排(pai)煙(yan)(yan),當(dang)(dang)溫度(du)(du)(du)到(dao)達280時易熔合(he)金熔化閥(fa)門(men)(men)關(guan)(guan)閉(bi),是一種二(er)次動作的閥(fa)門(men)(men)。
風(feng)(feng)(feng)管(guan)(guan)主(zhu)要指中(zhong)央空調系(xi)統的通(tong)風(feng)(feng)(feng)管(guan)(guan)道,它(ta)常常被忽視(shi),但(dan)卻是空調系(xi)統的重要組成(cheng)部分,目前常見的風(feng)(feng)(feng)管(guan)(guan)主(zhu)要有四種:1)鍍鋅(xin)薄鋼(gang)(gang)板風(feng)(feng)(feng)管(guan)(guan);2)無(wu)機(ji)玻(bo)(bo)璃鋼(gang)(gang)風(feng)(feng)(feng)管(guan)(guan);3)復合玻(bo)(bo)纖板風(feng)(feng)(feng)管(guan)(guan);4)纖維(wei)織物風(feng)(feng)(feng)管(guan)(guan)。鍍鋅(xin)薄鋼(gang)(gang)板風(feng)(feng)(feng)管(guan)(guan):早使用的風(feng)(feng)(feng)管(guan)(guan),采用鍍鋅(xin)薄鋼(gang)(gang)板制(zhi)作,適(shi)合含(han)濕量小的一般(ban)性(xing)氣體的輸送(song),有易生銹,無(wu)保(bao)溫和消聲(sheng)功(gong)能(neng)(neng),制(zhi)作安(an)裝(zhuang)周期長的特點。無(wu)機(ji)玻(bo)(bo)璃鋼(gang)(gang)風(feng)(feng)(feng)管(guan)(guan):較(jiao)新(xin)的風(feng)(feng)(feng)管(guan)(guan)類型(xing),采用玻(bo)(bo)璃纖維(wei)增強無(wu)機(ji)材料制(zhi)作,遇火不燃、耐腐(fu)蝕、份量重,硬度大但(dan)較(jiao)脆,受自重影響易變形酥裂,無(wu)保(bao)溫和消聲(sheng)性(xing)能(neng)(neng),制(zhi)作安(an)裝(zhuang)周期長。
在空調送風系統中,空調送風機送出的風必須通過主干管分配到支管中;在排煙系統中,煙氣由支管到主干管后,進入排煙風機排出。當建筑物內發生火災時,在通風、空調系統中,大渡口風機通風管為了防止火勢通過送風系統蔓延,當送風系統中氣體溫度達到70℃時,防火閥機構上熔斷器動作,閥門亦迅速關閥,切斷煙氣與火勢沿風管蔓延的通路。同樣,在排煙系統中,發生火災時,排煙閥開啟,進行排煙,風機通風管廠家為了截斷高溫(wen)煙(yan)(yan)(yan)(yan)氣在排(pai)煙(yan)(yan)(yan)(yan)管路中流動,防止(zhi)火勢蔓(man)延到(dao)另一防火分區,當排(pai)出的煙(yan)(yan)(yan)(yan)氣溫(wen)度達到(dao)280℃時,排(pai)煙(yan)(yan)(yan)(yan)防火閥(fa)、排(pai)煙(yan)(yan)(yan)(yan)口(kou)上(shang)熔斷器(qi)動作,閥(fa)門必須自動關閉,阻(zu)止(zhi)排(pai)煙(yan)(yan)(yan)(yan)。由此可見,防火閥(fa)、排(pai)煙(yan)(yan)(yan)(yan)閥(fa)做到(dao)了該通(tong)則(ze)通(tong),該斷則(ze)斷的隔煙(yan)(yan)(yan)(yan)阻(zu)火作用。