精馏塔设计说明书1(2)

目 录

目录--------------------------------------------------------------------------------------------------------------2 一．前言---------------------------------------------------------------------------------------------------------3 1．1概述----------------------------------------------------------------------------------------------------4 1．2设计任务及要求---------------------------------------------------------------------------------- 4 二．塔的工艺计算------------------------------------------------------------------------------------------4 1．物料衡算----------------------------------------------------------------------------------------------------5 1．1物料衡算-------------------------------------------------------------------------------------------5 1．2物料衡算结果------------------------------------------------------------------------------------5

1．3各部分参数计算-------------------------------------------------------------------------------------6 1．4平均相对挥发度------------------------------------------------------------------------------------6 1．5回流比的确定--------------------------------------------------------------------------------------6 2．理论板数确定-----------------------------------------------------------------------------------------7 2.1精馏段操作线方程------------------------------------------------------------------------------7 2．2提馏段操作线方程-----------------------------------------------------------------------------7 2．3用图解法计算理论塔板数------------------------------------------------------------------------8 3．实际板数确定---------------------------------------------------------------------------------------------9 4．塔径设计计算--------------------------------------------------------------------------------------------9 4．1精馏塔设计的主要依据和条件------------------------------------------------------------9 4．1．1塔顶条件下的流量及物性参数-----------------------------------------------------9

4．1．2塔釜条件下的流量及物性参数-----------------------------------------------------10 4．1．3进料条件下的流量及物性参数-----------------------------------------------------10 4．1．4精馏段的流量及物性参数-----------------------------------------------------------11 4．1．5提馏段的流量及物性参数-----------------------------------------------------------12

4．2塔径的计算---------------------------------------------------------------------------------------12 4．3塔高的计算---------------------------------------------------------------------------------------13 5．塔板结构尺寸的确定------------------------------------------------------------------------------13 5．1塔板尺寸------------------------------------------------------------------------------------------14 5．2弓形降液管---------------------------------------------------------------------------------------14 5．2．1堰高------------------------------------------------------------------------------------------14 5．2．2降液管底隙高度--------------------------------------------------------------------------14 5．2．3进口堰高和受液盘---------------------------------------------------------------------14 5．3浮阀数目及排列--------------------------------------------------------------------------------14 6．流体力学验算----------------------------------------------------------------------------------------15 6．1干板阻力------------------------------------------------------------------------------------------15 6．2漏液验算------------------------------------------------------------------------------------------15 6．3液泛验算------------------------------------------------------------------------------------------16 6．4雾沫夹带验算------------------------------------------------------------------------------------16 7．操作性能负荷图-------------------------------------------------------------------------------------16 7．1雾沫夹带上限线--------------------------------------------------------------------------------16 7．2液泛线----------------------------------------------------------------------------------------------16 7．3液体负荷上限线--------------------------------------------------------------------------------16 7．4漏液线----------------------------------------------------------------------------------------------17