毕业设计说明书设计题目:年产学院:专业:化学工程与工艺6万吨甲醇合成工艺设计化学工程学院1目录第1章概述.........................................................................................31.1甲醇性质.............................................................................31.2甲醇用途............................................................................31.4甲醇生产原料....................................................................4第2章工艺流程设计..........................................................................52.1合成甲醇工艺的选择..........................................................52.1.1甲醇合成塔的选择........................................................62.1.2催化剂的选用................................................................62.1.3合成工序工艺操作条件的确定与论证.......................62.2粗甲醇的精馏........................................................................72.2.1精馏原理.........................................................................72.2.2精馏工艺和精馏塔的选择.............................................72.2.3精馏塔的选择..................................................................82.2.4生产工艺参数..................................................................8第3章6万吨甲醇工艺的计算.............................................................93.1工艺计算..................................................................................93.2计算基准..................................................................................93.3计算过程.................................................................................9第4章6万吨甲醇合成工艺的分析...................................................104.1甲醇合成热力学分析............................................................104.2平衡常数.................................................................................114.3副反应.....................................................................................124.4甲醇合成催化剂及反应条件..............................................124.1.1催化剂---------------------------------------------------------------124.1.2反应条件--------------------------------------------12第5章6万吨甲醇合成装置物料和能量衡算...................................145.1甲醇合成回路设计...............................................................145.2合成系统物料衡算...............................................................145.3合成反应器热量衡算条件-------------------------------165.4中间换热器热量衡算-------------------------------------18第6章结论..........................................................................................20参考文献...............................................................................................222第1章概述1.1甲醇性质甲醇俗称木醇、木精,英文名为methanol,分子式CH3OH。是一种无色、透明、易燃、有毒、易挥发的液体,略带酒精味;分子量32.04,相对密度0.7914(d420),蒸气相对密度1.11(空气=1),熔点-97.8℃,沸点64.7℃,闪点(开杯)16℃,自燃点473℃,折射率(20℃)1.3287,表面张力(25℃)45.05mN/m,蒸气压(20℃)12.265kPa,粘度(20℃)0.5945mPas。能与水、乙醇、乙醚、苯、酮类和大多数其他有机溶剂混溶。蒸气与空气形成爆炸性混合物,爆炸极限6.0%~36.5﹪(体积比)。化学性质较活泼,能发生氧化、酯化、羰基化等化学反应。1.2甲醇用途甲醇是重要有机化工原料和优质燃料,广泛应用于精细化工,...