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设计总说明：本设计的题目是甲醇生产过程中CO变换工段工艺初步设计，我选用的生产甲醇的方法是煤制甲醇。煤制甲醇在世界经过很长时间的发展，已经成为一种成熟的生产工艺。它通过调整合适的氢碳比来使得甲醇的生产率变高。在一般情况下，CO变换反应后生成甲醇，使它成为甲醇合成的H2的需要，并且可以移除二氧化碳。在这次的设计中，我选用了中温耐硫部分变换工艺，它的好处是降低脱硫过程工程的数量，降低单位能耗，而且还节省了资金和成本。本设计还采用了全低变工艺，由于一氧化碳变换反应是放热反应，在低温的情况下有利于一氧化碳的变换。并且，低温变换工艺简单，实用。23455
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本设计首先分析了该方案的可行性，并对热平衡和物料平衡转化过程相关单位进行了详细的计算。
关键词：中温耐硫变换；工艺尺寸计算；一氧化碳的变换反应；氢碳比
ABSTRACT
The general description of the design:The topic of this design is the preliminary design of the CO transformation process in the process of methanol production, Method for producing methanol I use is the coal to methanol. Coal to methanol after the development for a long time in the world,It has become a mature production technology. It by adjusting the hydrogen carbon ratio suitable makes the methanol productivity high. Under normal circumstances, The production of methanol after the transformation reaction of CO, The synthesis of methanol into H2, And it also can remove CO2. In this design, I chose the sulfur resistant part of the transformation process, Its advantage is to reduce the number of desulfurization process, Apparatus for reducing consumption, And it saves money and cost. The design also uses a full low temperature shift process, Because the carbon monoxide conversion reaction is exothermic reaction, For carbon monoxide transformation in the condition of low temperature.Also, low temperature shift process simple, practical.
This design first analyses the feasibility of the scheme, Secondly, related units to transform the process of hot material balance and material balance. Finally completed the design and calculation of process dimension and the main tower equipment.
Key words: Sulfur resistant transformation; Parameters calculation; The shift reaction of carbon monoxide; Hydrogen carbon ratio
目 录
1 前言 1
1.1 课题的背景和意义 1
1.2 甲醇产品概述 1
1.2.1 甲醇产品的用途 1
1.2.2 甲醇产品生产状况 2
1.3 CO变换技术研究概括 3
1.3.1 CO变换反应原理 3
1.3.2 CO变换工艺的选择 3
1.3.3 CO变换工艺条件的选择 3
1.4 设计内容、目的及思路 5
2 1万t/a甲醇可行性分析报告 6
2.1 生产规模及产品方案 6
2.2 产品概述 6
2.3 工艺技术选择 6
2.4环境保护 11
3 CO变换工段设计及计算 11
3.1 设计依据、规范和要求 11
3.1.1设计规范和要求 11
3.2 工艺流程的设计 11
3.3 设计参数的确定 13
3.3.1确定转化气的组成 13
3.3.2汽气比的确定 14
3.4 中温变换炉物料和热量的衡算 15
3.4.1中变炉催化床层的物料衡算 15
3.4.2中变炉催化床层的热量衡算 17