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消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)機(ji)(ji)一(yi)(yi)般是(shi)采(cai)用(yong)(yong)離(li)心式風(feng)(feng)(feng)(feng)機(ji)(ji)和(he)軸流(liu)(liu)(liu)式風(feng)(feng)(feng)(feng)機(ji)(ji)兩(liang)(liang)種(zhong)(zhong)(zhong)重要的(de)型(xing)(xing)式。從消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)風(feng)(feng)(feng)(feng)量(liang)、風(feng)(feng)(feng)(feng)壓(ya)(ya)考慮來(lai)(lai)看,消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)是(shi)高(gao)比轉高(gao)效率的(de)風(feng)(feng)(feng)(feng)機(ji)(ji),更加的(de)適合選用(yong)(yong)軸流(liu)(liu)(liu)風(feng)(feng)(feng)(feng)機(ji)(ji)。軸流(liu)(liu)(liu)式消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)有兩(liang)(liang)種(zhong)(zhong)(zhong)設計型(xing)(xing)式,一(yi)(yi)種(zhong)(zhong)(zhong)為(wei)(wei)電機(ji)(ji)與(yu)主氣流(liu)(liu)(liu)分離(li)型(xing)(xing)式,另(ling)一(yi)(yi)種(zhong)(zhong)(zhong)為(wei)(wei)電機(ji)(ji)置于(yu)主氣流(liu)(liu)(liu)之(zhi)中。根據煙(yan)(yan)氣溫度(du)的(de)不同,采(cai)用(yong)(yong)不同型(xing)(xing)式的(de)消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji),溫度(du)大于(yu)400℃時(shi),采(cai)用(yong)(yong)電機(ji)(ji)與(yu)主氣流(liu)(liu)(liu)分離(li)型(xing)(xing)式,溫度(du)小于(yu)400℃大于(yu)150℃,兩(liang)(liang)種(zhong)(zhong)(zhong)型(xing)(xing)式的(de)電機(ji)(ji)都可(ke)以(yi)(yi)選擇,在溫度(du)小于(yu)150℃的(de)時(shi)候,采(cai)用(yong)(yong)電機(ji)(ji)置于(yu)主氣流(liu)(liu)(liu)之(zhi)中。 軸流(liu)(liu)(liu)消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)的(de)流(liu)(liu)(liu)量(liang)范圍從7200m?/h至110000m?/h,有不同型(xing)(xing)號的(de)編制,用(yong)(yong)來(lai)(lai)滿(man)足不同通風(feng)(feng)(feng)(feng)排(pai)煙(yan)(yan)流(liu)(liu)(liu)量(liang)的(de)需求(qiu)。消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)可(ke)以(yi)(yi)根據壓(ya)(ya)力(li)情況的(de)不同分為(wei)(wei)兩(liang)(liang)種(zhong)(zhong)(zhong)類型(xing)(xing),一(yi)(yi)類為(wei)(wei)軸流(liu)(liu)(liu)式消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)機(ji)(ji),其各(ge)機(ji)(ji)號的(de)壓(ya)(ya)力(li)在600Pa左右(you)(you),另(ling)一(yi)(yi)類為(wei)(wei)斜(xie)流(liu)(liu)(liu)消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji),各(ge)機(ji)(ji)號的(de)壓(ya)(ya)力(li)在1000Pa左右(you)(you)。為(wei)(wei)了(le)滿(man)足排(pai)煙(yan)(yan)量(liang)和(he)通風(feng)(feng)(feng)(feng)換氣的(de)要求(qiu),消(xiao)(xiao)防(fang)排(pai)煙(yan)(yan)風(feng)(feng)(feng)(feng)機(ji)(ji)一(yi)(yi)般都設計了(le)雙速型(xing)(xing)的(de)結構(gou)模式。低速可(ke)以(yi)(yi)通風(feng)(feng)(feng)(feng)使(shi)用(yong)(yong),高(gao)速可(ke)以(yi)(yi)排(pai)放煙(yan)(yan)霧,這(zhe)樣不但可(ke)以(yi)(yi)節約(yue)能源(yuan)同時(shi)又(you)降低了(le)噪聲污(wu)染。
鑒于軸(zhou)流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)有紊流(liu)(liu)(liu)區(qu)的(de)性(xing)能(neng)特點,在(zai)(zai)(zai)選型和(he)使(shi)(shi)用(yong)時(shi),需要(yao)注(zhu)意以下(xia)兩點:建議使(shi)(shi)用(yong)在(zai)(zai)(zai)空曠(kuang)環(huan)境中(zhong),軸(zhou)流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)的(de)輸入(ru)(ru)功率隨系(xi)(xi)統(tong)靜(jing)壓(ya)(ya)的(de)增大(da)而增大(da),而在(zai)(zai)(zai)紊流(liu)(liu)(liu)區(qu),輸入(ru)(ru)功率的(de)增大(da)幅度會更大(da)。因此,軸(zhou)流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)一般多應用(yong)在(zai)(zai)(zai)有較大(da)空曠(kuang)環(huan)境的(de)場合(he)下(xia),可(ke)以使(shi)(shi)其工(gong)(gong)作在(zai)(zai)(zai)靜(jing)壓(ya)(ya)較低(di)的(de)環(huan)境下(xia),降低(di)功耗(hao),保證(zheng)穩定(ding)(ding)性(xing)和(he)壽命。定(ding)(ding)期(qi)清理風(feng)(feng)(feng)道(dao)(dao)(dao),當(dang)軸(zhou)流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)應用(yong)在(zai)(zai)(zai)較為(wei)封閉的(de)風(feng)(feng)(feng)道(dao)(dao)(dao)系(xi)(xi)統(tong)中(zhong)時(shi),長期(qi)運(yun)行后風(feng)(feng)(feng)道(dao)(dao)(dao)中(zhong)的(de)積灰、垃圾逐(zhu)漸變多,會使(shi)(shi)風(feng)(feng)(feng)道(dao)(dao)(dao)內的(de)靜(jing)壓(ya)(ya)逐(zhu)漸增加,使(shi)(shi)得(de)風(feng)(feng)(feng)機(ji)的(de)運(yun)行工(gong)(gong)況點逐(zhu)漸左移(yi)。這不僅會降低(di)風(feng)(feng)(feng)機(ji)性(xing)能(neng),更重要(yao)的(de)是(shi)會增加軸(zhou)流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)進(jin)入(ru)(ru)紊流(liu)(liu)(liu)區(qu)的(de)風(feng)(feng)(feng)險。因此必(bi)須要(yao)定(ding)(ding)期(qi)清理風(feng)(feng)(feng)道(dao)(dao)(dao),保證(zheng)風(feng)(feng)(feng)機(ji)工(gong)(gong)況點不產生(sheng)較大(da)偏移(yi)。
消防排(pai)煙(yan)(yan)風(feng)(feng)機(ji)首先應(ying)該滿足溫(wen)(wen)度和(he)時間(jian)的特性(xing)(xing),即國(guo)家規定280℃/0.5h;其(qi)(qi)次,在一般環境溫(wen)(wen)度下,可(ke)(ke)以保證(zheng)有效(xiao)的排(pai)煙(yan)(yan)控(kong)制量(liang)。此外還要(yao)求消防排(pai)煙(yan)(yan)風(feng)(feng)機(ji)能夠(gou)(gou)進行(xing)周期性(xing)(xing)的實驗,能夠(gou)(gou)發現其(qi)(qi)中的不足,并加以改(gai)進;可(ke)(ke)以適(shi)用(yong)(yong)(yong)各種通風(feng)(feng)要(yao)求的管道(dao),便于(yu)安裝與使用(yong)(yong)(yong)。消防排(pai)煙(yan)(yan)風(feng)(feng)機(ji)的性(xing)(xing)能優良(liang)(liang)、耐高溫(wen)(wen)性(xing)(xing)能良(liang)(liang)好、效(xiao)率高、占(zhan)地比離心風(feng)(feng)機(ji)少、高溫(wen)(wen)性(xing)(xing)能優良(liang)(liang)。消防排(pai)煙(yan)(yan)風(feng)(feng)機(ji)能在300℃高溫(wen)(wen)條件下連續(xu)(xu)運(yun)行(xing)60分鐘以上,100℃溫(wen)(wen)度條件下連續(xu)(xu)20小時不損壞,應(ying)用(yong)(yong)(yong)范(fan)圍廣(guang),可(ke)(ke)根(gen)據高級(ji)民用(yong)(yong)(yong)建(jian)(jian)筑的不同要(yao)求,采(cai)用(yong)(yong)(yong)變(bian)速或(huo)多速的驅動型式,消防排(pai)煙(yan)(yan)風(feng)(feng)機(ji)廣(guang)泛應(ying)用(yong)(yong)(yong)于(yu)高級(ji)民用(yong)(yong)(yong)建(jian)(jian)筑、烤箱、地下車庫、隧道(dao)等場合。安裝方便,可(ke)(ke)直接和(he)墻壁(bi)安裝,安裝可(ke)(ke)采(cai)用(yong)(yong)(yong)垂直式、水(shui)平式或(huo)吊裝式,很大(da)程度上節(jie)省了(le)占(zhan)地面積(ji)。
通風、空調設備防火防爆措施1、空氣中含有容易起火或爆炸物質的房間,其送、排風系統應采用防爆型的通風設備和不會產生火花的材料(如可采用有色金屬制造的風機葉片和防爆電動機)。當送風機布置在單獨分隔的通風機房內,且送風干管上設置防止回流設施時,中央空調價格可采用普通型通風設備。2、含有易燃、易爆粉塵(碎屑)的空氣,在進入排風機前應采用不產生火花的除塵器進行處理,貴州中央空調以防止(zhi)除(chu)塵(chen)器(qi)工作過程中產(chan)生火花引起(qi)粉(fen)塵(chen)、碎屑(xie)燃(ran)燒或爆炸。對于(yu)遇濕(shi)可(ke)能爆炸的(de)(de)(de)粉(fen)塵(chen)(如(ru)電(dian)石、鋅(xin)粉(fen)、鋁鎂合金(jin)粉(fen)等),嚴禁(jin)采用濕(shi)式除(chu)塵(chen)器(qi)。3、排(pai)除(chu)、輸送(song)有(you)燃(ran)燒、爆炸危險的(de)(de)(de)氣(qi)(qi)(qi)體(ti)(ti)、蒸氣(qi)(qi)(qi)和(he)粉(fen)塵(chen)的(de)(de)(de)排(pai)風系統,應(ying)采用不(bu)(bu)燃(ran)材料并設有(you)導除(chu)靜電(dian)的(de)(de)(de)接地裝置(zhi)(zhi)。其排(pai)風設備不(bu)(bu)應(ying)布(bu)置(zhi)(zhi)在(zai)地下、半地下建(jian)筑(室)內,以防止(zhi)有(you)爆炸危險的(de)(de)(de)蒸氣(qi)(qi)(qi)和(he)粉(fen)塵(chen)等物(wu)質的(de)(de)(de)積聚。4、排(pai)除(chu)、輸送(song)溫度超過80℃的(de)(de)(de)空氣(qi)(qi)(qi)或其他氣(qi)(qi)(qi)體(ti)(ti)以及容(rong)易起(qi)火的(de)(de)(de)碎屑(xie)的(de)(de)(de)管道(dao),與(yu)(yu)可(ke)燃(ran)或難(nan)燃(ran)物(wu)體(ti)(ti)之間應(ying)保(bao)持不(bu)(bu)小于(yu)150mm的(de)(de)(de)間隙,或采用厚度不(bu)(bu)小于(yu)50mm的(de)(de)(de)不(bu)(bu)燃(ran)材料隔熱,以防止(zhi)填塞物(wu)與(yu)(yu)構(gou)件(jian)因受這(zhe)些高(gao)(gao)溫管道(dao)的(de)(de)(de)影響而導致火災(zai)。當(dang)管道(dao)互為上(shang)下布(bu)置(zhi)(zhi)時(shi),表(biao)面溫度較(jiao)高(gao)(gao)者應(ying)布(bu)置(zhi)(zhi)在(zai)上(shang)面。