化工原理課件蒸餾(1)(已修改)
2025-05-14 01:11 本頁面
【正文】 精餾原理與流程 School of Chemistry and Chemical Engineering, SCUT , Yang dongjie One flashvaporization stage max11min yyxxx FBubble pointDew point line冷凝器分離器加熱器 11yxxF冷凝器分離器加熱器 11yxxF冷凝器分離器加熱器 11yxxF冷凝器加熱器S ep a r a t o ryxx F11C o n d e n s e ryxx F分離器加熱器11Heatermax11min yyxxx F max11min yyxxx F max11min yyxxx F max11min yyxxx F泡tttedew1泡露ttte1b u b b leettt1露y1x1 精餾原理 YDJ,School of Chemical and Chemistry Engineering ,SCUT 多次部分汽化和多次部分冷凝 xF y1 x1 y2 x2 y3 x3 y3 y2 2 1 3 x1’ y1 x2’ x3’ x3 YDJ,School of Chemical and Chemistry Engineering ,SCUT y1y2y3…..xD。 x’1x’2x’3…xW Pure A and Pure B The amount of A and B is few, yield is lower 缺點(diǎn)： ； (大量的中間產(chǎn)品 ) ，設(shè)備投資大； ，過程有相變。 多次部分汽化和多次部分冷凝 是精餾分離的必要條件 YDJ,School of Chemical and Chemistry Engineering ,SCUT 問題：工業(yè)上如何實(shí)現(xiàn)？ ?x3 y1 Mass transfer ? T3T1 heat tramsfer xF x1 y2 x2 y3 x3 y1 3 2 1 y2 2 1 3 x1 y1 xD x2 x3 y3 YDJ,School of Chemical and Chemistry Engineering ,SCUT 缺點(diǎn) :設(shè)備復(fù)雜 有回流 的多次部分汽化和多次部分冷凝 y39。3 x39。3 y39。4 y2 2 1 3 x39。2 x39。4 x1 y1 xD x2 x3 y3 引入回流 最上層冷凝器 －提供下降液流 最下層加熱器 －提供上升蒸汽 School of Chemistry and Chemical Engineering, SCUT , Yang dongjie ?In a distillation column the stages (referred to as sieve plates or trays) in a distillation tower are arranged vertically, )(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxx)(333222111DFxtyxtyxtyxxSchool of Chemistry and Chemical Engineering, SCUT , Yang dongjie V IYDJ,School of Chemical and Chemistry Engineering ,SCUT 塔板的作用 ?塔板提供了 汽液分離的場(chǎng)所； ?每一塊塔板是一個(gè) 混合分離器； ?足夠多的板數(shù) 可使各組分 較完全分離 。 School of Chemistry and Chemical Engineering, SCUT ,
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