Device and method for co-production or single production of refined methanol with rough methanol

Abstract

The invention relates to a production device and method for co-production of crude methanol or single production of refined methanol and / or dimethyl ether. It includes a reactor and four towers. The present invention organically combines the methanol rectification device and the dimethyl ether device, and all the rectification towers of dimethyl ether are shared with the methanol rectification tower, which can realize the co-production of refined methanol and dimethyl ether or the single production of refined methanol or dimethyl ether The operation of the three technical processes of methyl ether saves investment and energy, reduces production costs, makes the best use of everything, and improves the utilization rate of the device. Moreover, when co-producing or producing dimethyl ether alone, the crude methanol raw material passes through the first tower to remove light components, which reduces the load on the reactor, the reaction product is easy to separate, and the quality of the dimethyl ether product is high; The methanol vapor returns directly to the three towers without condensation, and the separation capacity of the three towers is used to obtain refined methanol, which saves investment and reduces energy consumption.

Description

Technical field [0001] The invention relates to a device and method for producing refined methanol and dimethyl ether in the field of chemical industry, in particular, it is a production device and method for co-production of crude methanol or single production of refined methanol and / or dimethyl ether. Background technique [0002] Methanol and dimethyl ether are the two most common products of coal-to-oil at present, and their raw materials are crude methanol. The typical composition of crude methanol is as follows: [0003] components Contentwt% hydrogen 10±5ppm Nitrogen 70±30ppm carbon monoxide 100±50ppm carbon dioxide 0.9±0.3 methane 200±100ppm ethane 50±30ppm Dimethyl ether 0.15±0.1 Methyl formate 0.10±0.5 water 13±10 acetone 50±40ppm Methanol 85±10 ethanol 0.15±0.1 propanol 300±100ppm Butanol 100±50ppm ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a production device for co-production of crude methanol or single production of refined methanol and / or dimethyl ether against the inflexible production scheme of refined methanol and dimethyl ether in the prior art, so as to save the device Purpose of investment and flexible adjustment of production plan

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