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2018-09-03View Original

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最近在复*化工原理,在看到精馏计算时,发现q线方程的推导遇到了问题,精馏段:y=(L/L+D)x+(D/L+D)xD 提馏段:y=(Lˊ/L'-W')x-(W/L'-Wˊ)xW 进料板:L'=L+qF 请问这个q线方程y=q/(q-1)x-1/(q-1)xF是如何推导出来的呢。 百思不得姐,求助大家
Reply #22018-09-03
本帖最后由 大梦想的小菜鸟 于 2018-9-3 14:53 编辑 已完成,推到如下: 精馏段Vy=Lx+DxD 提馏段V'y=L'x-WxW 两式相减(V'-V)y=(L'-L)x-(WxW+DxD) 即(V'-V)y=(L'-L)x-FxF 在推导q线时,L'=L+qF、 V'=V+(q-1)F.带入可得 (q-1)Fy=qFx-FxF。则y=qx/(q-1)-xF/(q-1)即线方程

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