Save Energy in Binary Distillation

Consider three alternatives for columns requiring low temperatures

Save Energy in Binary Distillation mn

Conventional designs for binary distillation generally work well but consume a lot of energy. Usually site-generated steam boils up the liquid bottoms of the column and site-generated refrigerated liquids condense the vapor that comes off the top of the column. The key to efficient operation is finding the optimum saturation pressure temperature offset for separating the two components. However, an optimum point that requires very low temperatures can pose significant cost issues. As temperatures get lower, the energy cost for producing them escalates. A high reflux ratio, if necessary, cascades over to a greater cost for the steam or other boil-up fluid. In such cases,…

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    By Earl Clark, Energy Columnist

    Conventional designs for binary distillation generally work well but consume a lot of energy. Usually site-generated steam boils up the liquid bottoms of the column and site-generated refrigerated liquids condense the vapor that comes off the top of the column. The key to efficient operation is…

    Full Story
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