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細水(shui)霧滅(mie)火系統是利用(yong)壓力水(shui)流過細水(shui)霧噴頭(tou)后形成的(de)細小霧滴進行滅(mie)火或防護冷(leng)卻的(de)一(yi)種(zhong)固定式滅(mie)火系統,細水(shui)霧霧滴平均直徑小于200μm,比表(biao)面積和(he)密(mi)度較高(gao)(gao),遇火焰(yan)高(gao)(gao)溫(wen)(wen)后迅速汽(qi)化(hua),體積可膨脹1700倍以上(shang),使保護區的(de)氧(yang)濃度大為降低(di),具有很強的(de)汽(qi)化(hua)降溫(wen)(wen)作(zuo)(zuo)用(yong)和(he)隔氧(yang)窒息作(zuo)(zuo)用(yong),同時吸收大量熱量,起到隔絕氧(yang)氣和(he)降溫(wen)(wen)的(de)雙生作(zuo)(zuo)用(yong),達到迅速滅(mie)火的(de)目的(de)。
水霧降溫工程設計
依據所噴出之水珠大小,風機水霧法又分為水霧(mist)與細霧(micromist);其顆粒大小分別為1 mm 與0.1 mm。由于水霧之顆粒較大,噴出之后很快就落至植株體上或著地,是以蒸發效果不好,后者大約只有50%的水份能有效蒸發帶走蒸發潛熱,前者能帶走的熱更少。更有甚者,前者可能造成過濕而導致植株的腐敗,使用上不可不慎。
水霧降溫工程設計
風(feng)機(ji)(ji)濕(shi)簾法(fa)與(yu)風(feng)機(ji)(ji)水(shui)(shui)霧(wu)法(fa)之(zhi)(zhi)水(shui)(shui)墻(qiang)與(yu)水(shui)(shui)霧(wu)產(chan)生(sheng)設(she)(she)備通常(chang)只(zhi)安裝在(zai)溫(wen)(wen)室(shi)之(zhi)(zhi)一(yi)側(ce)(ce),是以無(wu)可避免的溫(wen)(wen)室(shi)內(nei)(nei)會(hui)有(you)溫(wen)(wen)度(du)梯度(du)的現象。風(feng)機(ji)(ji)微(wei)霧(wu)法(fa)通常(chang)有(you)多重『水(shui)(shui)線』,若在(zai)吸氣(qi)口(kou)側(ce)(ce)廣設(she)(she)預(yu)冷水(shui)(shui)線,在(zai)室(shi)內(nei)(nei)氣(qi)流之(zhi)(zhi)中(zhong)途設(she)(she)再冷水(shui)(shui)線,一(yi)般降(jiang)溫(wen)(wen)效果較佳且(qie)均(jun)勻。設(she)(she)計良(liang)好之(zhi)(zhi)風(feng)機(ji)(ji)微(wei)霧(wu)型(xing)降(jiang)溫(wen)(wen)設(she)(she)備可將溫(wen)(wen)室(shi)溫(wen)(wen)度(du)降(jiang)至同于外界大氣(qi)之(zhi)(zhi)濕(shi)球溫(wen)(wen)度(du)。噴霧(wu)系(xi)統的降(jiang)溫(wen)(wen)能力除了與(yu)噴嘴的效率相關之(zhi)(zhi)外,其噴水(shui)(shui)量(liang)是否適(shi)量(liang)亦(yi)是一(yi)重要(yao)關鍵。
特點:
(1)對環境、保護對象、燃料均無任何污染和損害,是理想的環保型產品。
(2)電絕緣性能(neng)好(hao),撲(pu)救帶(dai)電設備(bei)火(huo)災安(an)全可靠。
(3)滅火用水量小,水漬殘留少。
(4)細水霧噴射時可大大降低火災中的煙氣含量及毒性,有利于安全疏散。
(5)滅火性能好、應用廣泛,對火勢猛烈、蔓延速度快的火災,滅火性能更佳。
(6)水(shui)作(zuo)為滅火(huo)劑來源廣泛,價格低(di)廉。
(7)水罐在備(bei)用狀態下為常壓,無泄(xie)露問題,安全可靠。
霧(wu)(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)(pen)槍由兩層套管(guan)(guan)組(zu)成,外(wai)(wai)(wai)(wai)(wai)管(guan)(guan)為(wei)(wei)不(bu)(bu)銹鋼水(shui)(shui)(shui)管(guan)(guan),外(wai)(wai)(wai)(wai)(wai)管(guan)(guan)頭(tou)(tou)部(bu)(bu)(bu)裝(zhuang)有(you)(you)(you)霧(wu)(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)(pen)頭(tou)(tou),噴(pen)(pen)(pen)(pen)(pen)頭(tou)(tou)頂(ding)部(bu)(bu)(bu)為(wei)(wei)半球形(xing),頂(ding)部(bu)(bu)(bu)中心開(kai)有(you)(you)(you)孔(kong)(kong)(kong)(kong),該孔(kong)(kong)(kong)(kong)為(wei)(wei)霧(wu)(wu)化(hua)(hua)水(shui)(shui)(shui)噴(pen)(pen)(pen)(pen)(pen)出(chu)通(tong)道(dao)(dao)。內(nei)管(guan)(guan)為(wei)(wei)不(bu)(bu)銹鋼氣(qi)管(guan)(guan),不(bu)(bu)銹鋼氣(qi)管(guan)(guan)頭(tou)(tou)部(bu)(bu)(bu)裝(zhuang)有(you)(you)(you)氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui),氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)外(wai)(wai)(wai)(wai)(wai)徑和水(shui)(shui)(shui)路(lu)管(guan)(guan)道(dao)(dao)內(nei)徑相同,氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)中心開(kai)孔(kong)(kong)(kong)(kong),開(kai)孔(kong)(kong)(kong)(kong)尺寸根據噴(pen)(pen)(pen)(pen)(pen)水(shui)(shui)(shui)量來(lai)定,在(zai)氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)外(wai)(wai)(wai)(wai)(wai)部(bu)(bu)(bu)開(kai)有(you)(you)(you)四(si)條凹槽(cao),四(si)條凹槽(cao)提供高壓(ya)水(shui)(shui)(shui)通(tong)道(dao)(dao),在(zai)氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)頂(ding)部(bu)(bu)(bu)平面(mian)開(kai)有(you)(you)(you)十字(zi)交叉凹槽(cao)與(yu)氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)外(wai)(wai)(wai)(wai)(wai)部(bu)(bu)(bu)四(si)條凹槽(cao)相對應(ying)連(lian)(lian)同,頂(ding)部(bu)(bu)(bu)中心為(wei)(wei)氣(qi)路(lu)開(kai)孔(kong)(kong)(kong)(kong),這樣高壓(ya)水(shui)(shui)(shui)可以由氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)外(wai)(wai)(wai)(wai)(wai)部(bu)(bu)(bu)凹槽(cao)到達(da)頂(ding)部(bu)(bu)(bu)凹槽(cao),氣(qi)路(lu)噴(pen)(pen)(pen)(pen)(pen)嘴(zui)(zui)中心孔(kong)(kong)(kong)(kong)噴(pen)(pen)(pen)(pen)(pen)出(chu)的高壓(ya)空(kong)氣(qi)將高壓(ya)水(shui)(shui)(shui)噴(pen)(pen)(pen)(pen)(pen)到霧(wu)(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)(pen)頭(tou)(tou)中心孔(kong)(kong)(kong)(kong)中,高壓(ya)氣(qi)水(shui)(shui)(shui)混合后噴(pen)(pen)(pen)(pen)(pen)出(chu)霧(wu)(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)(pen)頭(tou)(tou)并迅速(su)擴張形(xing)成霧(wu)(wu)化(hua)(hua)水(shui)(shui)(shui)。霧(wu)(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)(pen)槍尾(wei)部(bu)(bu)(bu)的氣(qi)路(lu)管(guan)(guan)道(dao)(dao)連(lian)(lian)接外(wai)(wai)(wai)(wai)(wai)部(bu)(bu)(bu)高壓(ya)空(kong)氣(qi),水(shui)(shui)(shui)路(lu)管(guan)(guan)道(dao)(dao)連(lian)(lian)接外(wai)(wai)(wai)(wai)(wai)部(bu)(bu)(bu)高壓(ya)水(shui)(shui)(shui),氣(qi)路(lu)管(guan)(guan)道(dao)(dao)和水(shui)(shui)(shui)路(lu)管(guan)(guan)道(dao)(dao)由固定螺絲在(zai)尾(wei)部(bu)(bu)(bu)固定。
噴(pen)霧(wu)(wu)法,此類(lei)系(xi)統(tong)的(de)(de)使(shi)用早已存在(zai)(zai),卻是直到(dao)zui近才廣泛(fan)被應用在(zai)(zai)溫室中(zhong)(zhong)。噴(pen)霧(wu)(wu)系(xi)統(tong)所(suo)(suo)噴(pen)出之霧(wu)(wu)氣(qi)(qi)(fog )是由水(shui)蒸氣(qi)(qi)和極細小的(de)(de)水(shui)滴(di)所(suo)(suo)組成的(de)(de)。傳統(tong)的(de)(de)霧(wu)(wu)氣(qi)(qi)產(chan)生方式是水(shui)經由高壓(ya)過程(cheng)通過極小的(de)(de)洞(dong)(噴(pen)嘴)所(suo)(suo)產(chan)生的(de)(de)「云( cloud )」。就(jiu)理(li)想狀況而(er)言,「云」應該能(neng)懸浮在(zai)(zai)空(kong)中(zhong)(zhong),且維持(chi)一段(duan)時間,是以能(neng)*蒸發(fa)。另外,霧(wu)(wu)氣(qi)(qi)的(de)(de)產(chan)生亦可透(tou)過超音(yin)波振盪方式或旋轉離(li)心(xin)方式產(chan)生。
普通降溫法:
1、使用風扇降溫:
使用風扇降溫是利用人體表皮水分揮發的原理來降溫的。前提條件空氣的溫度低于人體溫度,人才會感覺涼爽。但對于夏季的工廠,風扇所吹的風均為熱風,人體無法降溫,因此并不能很好的降溫。
2、使用冰塊降溫:
使用冰塊降溫,原理是通過冰塊融化吸熱,是空氣的溫度降下來,但是因為空氣導熱性差的原因,這種方式只適合范圍小,密封的空間內。
3、使用空調降溫:
使用(yong)(yong)(yong)(yong)(yong)空調降溫(wen)(wen)(wen),是一種效果明顯(xian)的(de)降溫(wen)(wen)(wen)方(fang)式,使用(yong)(yong)(yong)(yong)(yong)與車間(jian)等密封環境,但使用(yong)(yong)(yong)(yong)(yong)空調降溫(wen)(wen)(wen)的(de)安(an)裝成本(ben)和(he)使用(yong)(yong)(yong)(yong)(yong)成本(ben)都較高(gao),所以(yi)只適合(he)高(gao)附加(jia)值(zhi)的(de)車間(jian)使用(yong)(yong)(yong)(yong)(yong)。