年产15万吨甲醇合成二甲醚的工艺设计
毕业论文关键词：二甲醚；甲醇；工艺设计；精馏
Abstract: As LPG and oil alternative fuel, DME has drawn attentions at present. Physicalproperties of DME is similar for LPG, and don’t produce combustion gas to damage theenvironment, so, It can be produced large. Like methane, DME is expected to become 21stcentury energy resources. DME is prepared by methanol dehydration, namely, syntheticmethanol first and then methanol dehydration to dimethyl ether by methanol dehydration.Methanol dehydration to DME is pided into two kinds of liquid phase and gas-phase process.This design uses a process gas of dimethyl ether prepared by dimethyl. Heating methanol toevaporation, methanol vapor through the γ-A12O3catalyst bed, vapor methanol dehydration todimethyl ether by. Dimethyl ether is obtained by design calculation of rectification towerpacking layer is 7.8 meters high,always rectifying packing layer height is 3.8 meters,thestripping section of packing layer height is 4.0 meters.The packed tower diameter is 1.0m. Thepacked tower height is 10.895 meters. Finally by the distillation of dimethyl ether contentreached 99.9%,achieved the desired goal.
Key words: dimethyl ether; methanol; process design; rectification
目录
引 言...6
第一章 文献综述...8
1.1 二甲醚概况.8
1.1.1 二甲醚的发展状况 8
1.1.2 二甲醚的传统领域的应用及其拓展.. 8
1.2 国内二甲醚市场简况.... 9
1.2.1 现状9
1.2.2 国内市场预测..11
1.3 国外二甲醚市场简况...11
1.3.1 现状...11
1.3.2 国外市场预测..13
1.4 原料说明...14
1.4.1 物理性质14
1.4.2 化学性质14
1.5 二甲醚的性质15
1.5.1 化学性质15
1.5.2 物理性质15
1.5.3 DME 的毒性16
第二章 工艺流程介绍.. 17
2.1生产方法简述.17
2.1.1 甲醇脱水制二甲醚... 17
2.1.2 合成气直接合成二甲醚 18
2.2 工艺流程说明19
2.2.1 原料甲醇20
2.2.2 反应...20
2.2.3 合成气冷却.20
2.2.4 二甲醚精馏.20
2.2.5 甲醇塔和二甲醚精馏塔 21
2.3生产工艺特点.21
2.4主要工艺指标.22
2.4.1 二甲醚产品指标.. 22
2.4.2 催化剂的使用..22
第三章 塔设备计算及选型.. 23
3.1 汽化塔及其附属设备的计算选型.. 23
3.1.1 物料衡算23
3.1.2 热量衡算25
3.1.3 理论板数、塔径、填料选择及填料层高度的计算.28
3.1.4 汽化塔附属设备的选型计算.. 33
3.2 合成塔物料衡算.34
3.3 精馏塔及其附属设备的计算选型.. 34
3.3.1 物料衡算35
3.3.2 热量衡算36
3.3.3 附属设备的选型计算.... 38
3.3.4 理论塔板数的计算... 38
3.3.5 精馏塔主要尺寸的设计计算.. 39
3.3.6 塔径设计计算..41