甲醇精馏英文文献及翻译

Methanol Distillation System: Process Analysis and Column Design Sun J insheng , Tian Yu f eng , Xu Shimin , Ding Hui , Wang Tao , Li Xingang , Zheng Yanmei

(1 Shool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072;

2 National Engineering Research Center for Distillation Technology, Tianjin 300072)

Abstract

Base on industrial research and experience, the process of methanol distillation is analyzed, and above all, a new concept of high pressure flowsheet and low pressure flowsheet is defined. The new configuration helps to handle problems encountered in many factories in China. The inter influence between process and column internal pattern is also pointed out. Recommendation of new column internal designs is given. Finally, industrial examples tell the how the new concept works and the possibility of combining process to give more opens to solve engineering problems.

Keywords methanol distillation, two - effect distillation, high pressure flowsheet and low pressure flowsheet, flowsheet analysis, simulation with hydraulic, column internal design

A very important material in organic chemical industry, methanol is widely involved in the manufacture of plastic material, synthetic fiber and

rubber, dyestuff, covering material, spice, medical field, pesticide and etc. Also, it is not only a fine solvent for many organic compounds but a sound substitute for gasoline in many countries as green energy. With the quick development of the national economy, the demand (actual or potential) of methanol has sharply increased, which accelerates the development of the methanol industry and increment of the methanol output. Presently, methanol distillation technology has been developed to be large - scale, low energy consuming and more environmental. The main patent dealers in this industry of the world have the equipments designed for 5 000 7 500 t/dEz~. But China (mainland) has hardly no running units with capability over 200kt/a of high quality (such as O - M - 232E US). Recently, National Engineering Research Center for Distillation Technology at Tianjin University

(NERCDT) has done much on technical and market research, including the simulation of all the familiar flowsheets on industrial and lab data, especially studying the 2 - effect heat exchange between the 2 methanol refining columns. As a summary of our work, the high pressure process and the low pressure process for 3 + 1 – column process was put forward.

1 PROCESS DESCRIPTION

Methanol can be synthesized from many materials, for instance, natural gas, gas oil, fuel oil, coal, etc. Except for the difference in catalysts, reaction mechanics and the concentration of methanol in raw