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(其極限值是全回流所需要的最少理論板數)，此時設備費用的減少將不能補償能耗費用的增加。</p><p>回流比的選擇是一個經濟問題，是在操作費(主要取決于能耗)和設備費(塔板數以及再沸器和冷凝器的傳熱面積)之間作出權衡。實際使用的回流比通常為最小回流比的1.1～2.0倍。</p><p>操作中精餾塔的分離能力，主要取決于回流比的大小。增大回流比，就可提高產品純度，但也增加了能耗。改變回流比，是調節精餾塔操作的方便而有效的手段。</p><p><br/></p> </div> <div class="share" aos="fade-up"> <span>分享到：</span> <a href="javascript:qzone()"><img src="/skin/img/ns2.png" tppabs="http://www.tofms.net/img/ns2.png" alt=""></a> <a href="javascript:sqq()"><img src="/skin/img/ns3.png" tppabs="http://www.tofms.net/img/ns3.png" alt=""></a> <a href="javascript:tsina()"><img src="/skin/img/ns4.png" tppabs="http://www.tofms.net/img/ns4.png" alt=""></a> <a href="javascript:weixin()"><img src="/skin/img/ns5.png" tppabs="http://www.tofms.net/img/ns5.png" alt=""></a> </div> <div class="relative-btn" aos="fade-up"><p>上一篇：<a href='http://www.deca500.com/xinwendongtai/322.html'>為滿足生產的需要減壓精餾儀要考慮哪些標準?</a></p><p>下一篇：<a href='http://www.deca500.com/xinwendongtai/320.html'>實驗室精餾操作順序</a></p><a 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