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href="/xingyedongtai/">行業(yè)動(dòng)態(tài)</a></li> </ul> </div> </div> </div> <div id="smuvymnrp" class="contentBox container newsView"> <div id="smuvymnrp" class="news_title"> 換熱器-行業(yè)知識 </div> <div id="smuvymnrp" class="news_tips"> <span >作者：admin</span> <span>發(fā)布時(shí)間：2023-05-16</span> </div> <div id="smuvymnrp" class="news_description"> <p style="line-height: 2em;">換熱器的種類(lèi)很多。按結構可分為：間壁式（包括板式和管殼式）、蓄液-浮筒型、混合式；按傳熱的原理分為對流換熱器和輻射散熱器等兩大類(lèi)。</p><p style="line-height: 2em;">（1）對流傳冷劑在兩種流體之間進(jìn)行熱量傳遞的器件稱(chēng)為換熱器。其作用是把一種工質(zhì)中的熱量轉移到另一種工質(zhì)的過(guò)程中來(lái)，以使工藝設備能在較低的操作溫度條件下正常工作。<br/></p><p style="line-height: 2em;">（2）傳熱過(guò)程是依靠物質(zhì)與物質(zhì)的接觸和導熱來(lái)實(shí)現的一種物理現象。由于物體表面間的溫差很大，因而有較大的吸濕性和放濕性。因此，當液體介質(zhì)流經(jīng)固體表面的時(shí)侯，就會(huì )吸收或放出大量的熱能而發(fā)生相變。這種由液態(tài)到氣態(tài)的過(guò)程叫做汽化（或稱(chēng)蒸發(fā)）；反之則叫冷凝（或凝華）。通過(guò)汽化的方式把能量從高溫處傳給低溫處的裝置稱(chēng)做蒸汽機。利用氣體在不同壓力下可以產(chǎn)生不同蒸發(fā)的特點(diǎn)制成的各種加熱元件及附件統稱(chēng)作散熱器。<br/></p><p style="line-height: 2em;">（3）在化工生產(chǎn)中常用的冷卻方法有兩種：一種是將物料直接放入水中或其他溶劑中進(jìn)行冷卻，這種方法通常用于水溶液系統上。另一種方法是采用循環(huán)流動(dòng)的冷卻回路來(lái)進(jìn)行冷卻，即所謂閉路系統的強制流動(dòng)冷卻法，該方法的優(yōu)點(diǎn)是：<br/></p><p>①能保持物料的清潔；②可避免雜質(zhì)混入；③可使某些易揮發(fā)成分不致因過(guò)熱分解；④適用于多組分混合物；⑤可用于高壓容器內；⑥便于實(shí)現自動(dòng)控制和調節；⑦易于回收余熱；⑧有利于節能等。但是它的缺點(diǎn)是①占地面積大；②需要消耗較多的動(dòng)力；③投資較高；④不易控制；⑤運行費用高；⑥維修管理復雜等等。<br/></p><p style="line-height: 2em;">（4）根據不同的用途和使用條件可將換熱器分成以下幾類(lèi)：<br/></p><p>板翅片式的換熱器：<br/></p><p style="line-height: 2em;">它是由許多具有一定波紋形狀的不銹鋼薄鋼，帶經(jīng)彎曲折疊焊接而成的平板狀金屬片，和一組平行排列的不銹鋼絲桿組成。具有體積小、重量輕的特點(diǎn)。<br/></p><p style="line-height: 2em;">①一般應用于小型設備和管道上的油溫、水溫的控制；②也可用作反應過(guò)程的夾套；③還可作分離空氣的洗滌塔。<br/></p><p><br/></p><p><br/></p> </div> <div id="smuvymnrp" class="paginationClick"> <div id="smuvymnrp" class="pre"> <a href="/xinwenzhongxin/240.html">上一篇 : 結晶器廠(chǎng)家：結晶器的分類(lèi)</a> </div> <div id="smuvymnrp" class="net"> <a href="/xinwenzhongxin/242.html">下一篇 : 不銹鋼儲罐要進(jìn)行清洗的原因</a> </div> </div> </div> <footer id="footer"> <div 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