摘 要：中国对二甲苯需求量迅速增长，但产品市场缺口巨大，对二甲苯仍处于供不应求的状态。为此，本设计总结了对二甲苯生产工艺的现状及其优缺点，采用甲苯甲醇烷基化工艺生产对二甲苯。此工艺具有流程简单、设备费用低、清洁环保与高效节能等优点。项目的技术经济分析表明，项目总投资约14.9亿元，投资回收期为3.8年，净现值为17520万元，内部收益率为25.8%，投资利润率为52.59%，所以项目盈利空间大且适应市场变化能力强。此外，对甲苯甲醇烷基化工艺中所产生的三废进行环境评价研究，提出的方案具有较好的环境效益。60901

毕业论文关键词：甲苯甲醇烷基化工艺，技术经济分析，三废，环境

Abstract: The demand of p-xylene grows rapidly in China, but the gap in product market is huge, p-xylene is still in short supply. Therefore, the present situation, advantages and disadvantages of the production process for p-xylene was summarized in the design, and technology of toluene alkylated with methanol was used to product p-xylene. This technology had the characteristics of  simple process, low cost, friendly environment and energy efficiency, etc. Technical and economic analysis of the project shows that the total investment is about 1.49 billion, the payback period is 3.8 years, the net present value is 175.2 million, the internal rate of return is 25.8% and the investment profit rate is 52.59%, so the project is of great profit space and has strong flexibility to market changes. In addition, environmental assessment for three wastes in this technology was studied in this design, and the proposed program had better environmental benefits.

Keywords: technology of toluene alkylated with methanol, technical and economic analysis, three wastes, environment 

1  前言 3

2  对二甲苯生产工艺 3

2.1  石油路线 4

2.2  煤化工路线 4

2.3  甲苯甲醇烷基化工艺 5

2.3.1  已有工艺分析 5

2.3.2  生产工艺设计 6

2.3.3  反应机理 9

2.3.4  反应器 9

2.3.5  催化剂 10

3  技术经济分析 10

3.1  编制依据及说明 10

3.2  生产总成本估算及成本构成明细 11

3.2.1  成本估算依据 11

3.2.2  投资估算 11

3.2.3  总成本构成与明细 15

3.2.4  总成本估算 17

3.3  销售收入及税金计算 18

3.3.1  销售收入估算 18

3.3.2  税金估算 19

3.4  财务分析 20

3.4.1  损益及利润分配估算表 20

3.4.2  现金流量表 20

3.5  经济评价 21

3.5.1  经济技术指标 21

3.5.2  静态分析 22

3.5.3  动态分析 22