38 continued analysis addition continued when an

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Unformatted text preview: ween the reboiler and the feed stage and an intercondenser is added between the feed stage and the overhead condenser, the column is made up of 4 sections instead of 2. Each section has its own operating line as shown in the McCabeThiele diagram below. In order to maintain the same reflux ratio and boilup ratio, the intercondenser is designed to condense a molar flow rate equal to that produced by the interreboiler. Thus, in Section 2 between the intercondenser and the feed stage, the L/V ratio is higher than the value in Section 1 between the overhead condenser and the intercondenser. Thus, the two operating lines above the feed stage have different slopes, but by material balance both lines pass through the distillate composition on the 45o line. Correspondingly, in Section 3 between the interreboiler and the feed stage, the L/V ratio is lower than the value in Section 4 between the reboiler and the interreboiler. Thus, the two operating lines below the feed stage have different slopes, but b...
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This note was uploaded on 09/08/2008 for the course CHE 244 taught by Professor Selebi during the Spring '06 term at Lehigh University .

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