年产20万吨煤制甲醇生产工艺毕业设计 毕业设计.doc

摘 要 甲醇是一种极重要的有机化工原料，也是一种燃料，是碳化学的基础产品，在国民经济中占有十分重要的地位。近年来，随着甲醇下属产品的开发，特别是甲醇燃料的推广应用，甲醇的需求大幅度上升。为了满足经济发展对甲醇的需求，开展了此20万t/a的甲醇项目。设计的主要内容是进行工艺论证，物料衡算和热量衡算等。本设计本着符合国情、技术先进和易得、经济、环保的原则，采用煤炭为原料；利用GSP气化工艺造气；NHD净化工艺净化合成气体；低压下利用列管均温合成塔合成甲醇；三塔精馏工艺精制甲醇；此外严格控制三废的排放，充分利用废热，降低能耗，保证人员安全与卫生。 关键词：甲醇合成；气体精馏；工艺流程 ABSTRACT Methanol is a kind of very important organic chemical raw materials, is also a kind of fuel, is a chemical carbon based products, in the national economy occupies very important position. In recent years, with the development of methanol subordinate products, especially the popularization and application of the methanol fuel, methanol demand increases. In order to meet the needs of economic development, methanol, carried out the 200000 t/a of methanol project. The design of the main content is process demonstration, and the material balance calculations and heat balance calculations, etc. This design with the situation of China, with advanced technology and are easy, economy, environment protection principle, the coal for raw materials; Use of GSP gasification process the gasification; NHD purification process synthesis gas purification; Low voltage of mean temperature tube synthesis tower methanol synthesis; Three tower distillation process refined methanol; In addition to strictly control the three wastes emissions, make full use of waste heat, reduce the energy consumption and ensure safety and health personnel. Keywords：methanol synthesis；gas distillation；process flow 目 录 1概论 ……………………………………………………………………………6 1.1概述 ………………………………………………………………………6 1.2设计的目的和意义 ………………………………………………………7 1.3设计依据 …………………………………………………………………7 1.4设计的指导思想 …………………………………………………………8 1.5原料煤的规格 ……………………………………………………………8 2工艺论证 ………………………………………………………………………9 2.1 煤气化路线的选择 ………………………………………………………9 2.2净化工艺方案的选择 ………………………………………………… 11 2.3合成甲醇工艺选择 ………………………………………………………12 2.4甲醇精馏 …………………………………………………………………14 3工艺流程 ………………………………………………………………………18 3.1 GSP气化工艺流程 ………………………………………………………18 3.2净化装置工艺流程 ………