在线亚洲日产一区二区-完整视频播放

空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)器(qi)(qi)(qi)（簡(jian)稱空(kong)(kong)冷(leng)(leng)(leng)(leng)(leng)(leng)器(qi)(qi)(qi)）是(shi)以環境(jing)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)作(zuo)為冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)介(jie)質，冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)高溫工藝流體的換(huan)(huan)熱(re)(re)(re)器(qi)(qi)(qi)，也稱空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)式換(huan)(huan)熱(re)(re)(re)器(qi)(qi)(qi)。管內的熱(re)(re)(re)流體通過管壁和翅片(pian)與管外空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)進行換(huan)(huan)熱(re)(re)(re)，所用(yong)的空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)通常由(you)通風機供給(gei)。空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)器(qi)(qi)(qi)可(ke)(ke)用(yong)于(yu)冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)或(huo)冷(leng)(leng)(leng)(leng)(leng)(leng)凝，廣泛應(ying)(ying)用(yong)于(yu)：煉(lian)油(you)、石(shi)油(you)化(hua)工塔頂蒸氣(qi)(qi)(qi)(qi)(qi)(qi)的冷(leng)(leng)(leng)(leng)(leng)(leng)凝；回流油(you)、塔底油(you)的冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)；各種反應(ying)(ying)生成物的冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)；循環氣(qi)(qi)(qi)(qi)(qi)(qi)體的冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)和電站(zhan)汽輪(lun)機排氣(qi)(qi)(qi)(qi)(qi)(qi)的冷(leng)(leng)(leng)(leng)(leng)(leng)凝。工作(zuo)壓力可(ke)(ke)達69MPa。但(dan)耗電量、噪(zao)聲和占地(di)面積均大，冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)效果受氣(qi)(qi)(qi)(qi)(qi)(qi)候變化(hua)影響較大。空(kong)(kong)冷(leng)(leng)(leng)(leng)(leng)(leng)器(qi)(qi)(qi)標(biao)準主要有(you)API 661《煉(lian)油(you)廠用(yong)通用(yong)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)(leng)(leng)卻(que)(que)換(huan)(huan)熱(re)(re)(re)器(qi)(qi)(qi)》、ISO 13706《石(shi)油(you)、石(shi)化(hua)和天然(ran)氣(qi)(qi)(qi)(qi)(qi)(qi)工業風冷(leng)(leng)(leng)(leng)(leng)(leng)式換(huan)(huan)熱(re)(re)(re)器(qi)(qi)(qi)》、GB／T 15386《空(kong)(kong)冷(leng)(leng)(leng)(leng)(leng)(leng)式換(huan)(huan)熱(re)(re)(re)器(qi)(qi)(qi)》等。

1. 空氣冷卻器的結構

空氣冷卻器(qi)主要由管束、通風機(ji)、構架及百葉窗等組(zu)成，如(ru)圖7.12所示(shi)。

12.1.jpg

空(kong)氣(qi)冷卻器管(guan)束(shu)包(bao)括(kuo)傳熱管(guan)、管(guan)箱、側(ce)梁和(he)橫梁等。它可按臥(wo)式(shi)(shi)、立式(shi)(shi)和(he)斜(xie)頂式(shi)(shi)（人(ren)字(zi)式(shi)(shi)）3種基本形(xing)式(shi)(shi)布(bu)置，見(jian)圖7.13。其中，臥(wo)式(shi)(shi)布(bu)置傳熱面(mian)積大，空(kong)氣(qi)分布(bu)均勻，傳熱效果好；斜(xie)頂式(shi)(shi)布(bu)置時(shi)，通風機安裝在人(ren)字(zi)中央空(kong)間，占地(di)面(mian)積小，結構緊湊。為抵消空(kong)氣(qi)側(ce)的(de)給熱系數較(jiao)低的(de)影響，通常采用光管(guan)外壁裝翅片(pian)的(de)管(guan)子(zi)。