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蒸汽疏水閥的三個節(jié)能作用

　　目前的蒸汽疏水閥型號很多，但其工作原理都是利用蒸汽和凝結(jié)水的高度、溫度、流速的差異，通過各種機構(gòu)來實現(xiàn)蒸汽疏水閥的啟閉，達到阻汽排水的目的。它主要有三個節(jié)能作用。　　
　　第一，迅速排出蒸汽采用設備內(nèi)產(chǎn)生的凝結(jié)水，使蒸汽采用設備的加熱效率保持在*佳狀態(tài)，使設備內(nèi)的凝結(jié)水不形成滯留，*大限度地確保設備內(nèi)的蒸汽空間，這樣可經(jīng)常保持*高的加熱效率。一旦蒸汽疏水閥不能充分的發(fā)揮作用，因為凝結(jié)水的滯留，不僅蒸汽采用設備的性能受到很大的影響，有時甚至使生產(chǎn)設備完全陷于癱瘓。　　
　　第二，迅速排出開始啟動時設備內(nèi)的空氣和低溫凝結(jié)水，從而縮短預熱運轉(zhuǎn)時間。開始通汽時，蒸汽輸送管路和蒸汽采用設備內(nèi)部都充滿了空氣，如不將它們排除，就無法送入蒸汽。此外，在蒸汽輸送管路和蒸汽采用設備升溫達到蒸汽溫度的過程中，所產(chǎn)生的初期低溫凝結(jié)水也要迅速排出，使設備在短時間內(nèi)實現(xiàn)正常運轉(zhuǎn)，這是提高生產(chǎn)效率的重要條件，特別是間歇生產(chǎn)的場合，因為縮短了預熱時間，也就縮短了每次的作業(yè)時間，因為增加了處理次數(shù)，*終可增加產(chǎn)量。以前，在預熱運轉(zhuǎn)時，先開啟旁通閥來排放初期空氣和低溫凝結(jié)水，現(xiàn)在因為選用了恰當?shù)恼羝杷y，既可自動排出初期空氣和初期低溫凝結(jié)水，又可節(jié)省人力。　　
　　第三，降低蒸汽疏水閥自身的蒸汽消耗量。所謂蒸汽疏水閥自身的蒸汽消耗量，一般是指蒸汽泄漏而言，是蒸汽疏水閥動作需要的蒸汽量和散熱損失量之和。

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