1756-DHRIO
系統(tǒng)的組成
系統(tǒng)運(yùn)行的示意圖如圖1所示。
由圖1可知，燃料和空氣按一定比例進(jìn)入燃燒室燃燒，產(chǎn)生的熱量傳遞給蒸汽發(fā)生系統(tǒng)，產(chǎn)生飽和蒸汽，經(jīng)負(fù)荷設(shè)備調(diào)節(jié)閥供給負(fù)荷設(shè)備使用。與此同時(shí)，燃燒過程中產(chǎn)生的煙氣，除將飽和蒸汽變成過熱蒸汽外，還經(jīng)省煤器預(yù)熱鍋爐給水和空氣預(yù)熱器預(yù)熱空氣，最后經(jīng)引風(fēng)機(jī)送往煙囪排入大氣。
鍋爐是個(gè)較復(fù)雜的調(diào)節(jié)對象，為保證提供合格的蒸汽以適應(yīng)負(fù)荷的需要，生產(chǎn)過程各主要工藝參數(shù)必須加以嚴(yán)格控制。主要調(diào)節(jié)項(xiàng)目有;負(fù)荷、鍋爐給水、燃燒量、減溫水、送風(fēng)等。主要輸出量是：汽包水位、蒸汽壓力、過熱蒸汽溫度、爐膛負(fù)壓、過?？諝獾?。這些輸入量與輸出量之間是互相制約的，例如，蒸汽負(fù)荷變化時(shí)，必然會(huì)引起汽包水位、蒸汽壓力和過熱蒸汽溫度的變化;燃料量的變化不僅影響蒸汽壓力，同時(shí)還會(huì)影響汽包水位、過熱蒸汽溫度、空氣量和爐膛負(fù)壓等。對于這樣復(fù)雜的對象，工程處理上作了一些簡化，將鍋爐控制系統(tǒng)劃分為若干個(gè)調(diào)節(jié)系統(tǒng)。
廈門卡庫電氣有限公司
【聯(lián)系人】： 嚴(yán)工
【業(yè)務(wù)QQ】： 1093230189
【電 話】： 0592-5709823
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【手 機(jī)】： 18030229052
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