Heat recycling system and method of acetic acid process production device

Abstract

The invention relates to a heat recycling system and method for an acetic acid process production device, the heat recycling system comprises an acetic acid production device and a heat circulating device, the acetic acid production device comprises a reaction kettle, a mother liquor flash evaporator and a rectification assembly, the heat circulating device comprises a first circulating heat exchanger, a steam flash evaporator, a steam heat exchanger, an external steam supply pipeline and a steam compressor, a synthetic mother liquor outlet of the reaction kettle is connected with a tube pass inlet of the first circulating heat exchanger through an external circulating pump, and a steam outlet of the external steam supply pipeline is communicated with a steam inlet of the reboiler group; and a steam outlet of the reboiler group is communicated with a steam inlet of the steam flash evaporator. According to the system and the method disclosed by the invention, the generated steam is pressurized by the first circulating heat exchanger and then meets the temperature requirement of the rectification assembly on the steam, so that the heat of the acetic acid synthesis reaction is recycled.

Description

technical field [0001] The invention relates to a heat recovery and utilization system and method of an acetic acid process production device, which belongs to chemical production equipment and production technology. Background technique [0002] Acetic acid, also called acetic acid, glacial acetic acid, chemical formula CH 3 COOH, an organic monobasic acid, is the main component of vinegar. Acetic acid is an important organic chemical product, mainly used in the production of vinyl acetate, acetate, acetic anhydride, terephthalic acid, chloroacetic acid and diketene, etc. important raw materials. In addition, it is also an excellent organic solvent, and has a very wide range of uses in chemical, textile, plastic, pharmaceutical, rubber and dye industries. [0003] At present, the foreign acetic acid industrial production technologies mainly include methanol low-pressure carbonylation method, acetaldehyde oxidation method, and n-butane / light oil oxidation method. Among th...

AI Technical Summary

Problems solved by technology

This method has the problems of large investment in recovering part of the CO process unit, high operating cost and the influence of adsorbent powder in the recovered carbon monoxide on the catalyst of the reaction system; in addition, some acetic acid production enterprises directly use the exhaust gas from the high-pressure absorption tower and the low-pressure absorption tower Directly go to the torch to burn through the venting pipeline, resulting in serious waste of heat

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