甲醇精馏塔毕业设计.docx
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甲醇精馏塔毕业设计
甲醇精馏塔毕业设计
【篇一:
甲醇水精馏塔毕业设计(最后定稿)】
1绪论...............................................................................................................................1
1.1设计意义...............................................................................................................................1
1.2塔设备类型简介...................................................................................................................1
1.3塔设备的发展状况及方向...................................................................................................2
1.4塔设备选型及要求...............................................................................................................2
1.6本章小结...............................................................................................................................3
2精馏塔工艺设计计算........................................................................................................4
2.1精馏塔全塔物料衡算...........................................................................................................4
2.1.1原料液及塔顶、塔底产品的摩尔分率.........................................................................4
2.1.2原料液及塔顶、塔底产品的平均摩尔质量.................................................................4
2.1.3物料衡算.........................................................................................................................4
2.2最小回流比的确定...............................................................................................................5
2.3塔板数的确定.......................................................................................................................6
2.3.1理论板数nt的求取.......................................................................................................6
2.3.2实际塔板数np的求取...................................................................................................7
2.4精馏塔有关物性数据的计算...............................................................................................7
2.4.1平均温度计算.................................................................................................................7
2.4.2平均密度计算.................................................................................................................8
2.4.3混合液体表面张力计算...............................................................................................10
2.4.4混合液体粘度计算......................................................................................................13
2.4.5混合液的相对挥发度计算...........................................................................................13
2.4.6气液相体积流量计算...................................................................................................13
2.5塔体工艺尺寸计算.............................................................................................................14
2.5.1塔径的计算...................................................................................................................14
2.5.2塔体有效高度的计算...................................................................................................16
2.6塔板工艺尺寸计算.............................................................................................................16
2.6.1溢流装置的设计计算...................................................................................................16
2.6.2塔板布置及筛孔数目与排列.......................................................................................18
2.7塔板流体力学验算.............................................................................................................20
2.7.1气相通过浮阀塔板的压降...........................................................................................20
2.7.2淹塔...............................................................................................................................21
2.7.3物沫夹带量...................................................................................................................22
2.8塔板性能负荷图.................................................................................................................23
2.8.1物沫夹带线...................................................................................................................23
2.8.2液泛线...........................................................................................................................24
2.8.3液相负荷上限线...........................................................................................................26
2.8.4漏液线...........................................................................................................................26
2.8.5液相负荷下限线...........................................................................................................26
2.9本章小结.............................................................................................................................29
3塔盘的结构设计..............................................................................................................30
3.1塔板结构.............................................................................................................................30
3.1.1矩形板...........................................................................................................................31
3.1.2通道板...........................................................................................................................31
3.1.3弧形板...........................................................................................................................31
3.2受液盘.................................................................................................................................32
3.2.1凹形受液盘...................................................................................................................32
3.2.2液封盘...........................................................................................................................32
3.3降液板.................................................................................................................................33
3.4支持板和支持圈.................................................................................................................33
3.5紧固件结构.........................................................................................................................33
3.6塔盘机械计算....................................................................................................................35
3.6.1塔盘的载荷...................................................................................................................35
3.6.2塔盘板的允许挠度.......................................................................................................35
3.6.3矩形板稳定性校核.......................................................................................................35
3.6.4通道板稳定性校核.......................................................................................................39
3.7本章小结.............................................................................................................................40
4辅助装置及附件设计......................................................................................................41
4.1接管设计.............................................................................................................................41
4.1.1进料管...........................................................................................................................41
4.1.2回流管...........................................................................................................................42
4.1.3塔釜出料管...................................................................................................................42
4.1.4塔顶蒸气出料管...........................................................................................................43
4.1.5塔釜进气管...................................................................................................................44
4.1.6法兰...............................................................................................................................44
4.2除沫器设计.........................................................................................................................44
4.2.1设计气速的选取...........................................................................................................45
4.2.2除沫器直径计算...........................................................................................................46
4.3吊柱.....................................................................................................................................46
4.3.1吊柱的选型...................................................................................................................46
4.3.2吊柱的结构...................................................................................................................46
4.4人孔.....................................................................................................................................47
4.5裙座.....................................................................................................................................48
4.5.1裙座选材.......................................................................................................................48
4.5.2裙座的结构...................................................................................................................48
4.6操作平台和扶梯.................................................................................................................50
4.7本章小结.............................................................................................................................50
5塔的强度设计和稳定性校核........................................................................