Clean and energy-saving type production and salt preparation process

Abstract

The invention belongs to the field of clean production, and particularly relates to a clean and energy-saving type production and salt preparation process. Firstly, lime cream is fed into raw materialbrine; then, the brine is processed by a lime flue gas method; the reacted brine is filtered by a coarse filter, and is then pumped into a ceramic filtering membrane filtering device to remove calcium and magnesium; the obtained clear liquid is used for preparing liquid salt or is fed into machinery for preparing solid salt through a hot compression MVR evaporative crystallization technology.

Description

technical field [0001] The invention belongs to the field of clean production, and in particular relates to a clean and energy-saving salt production process. Background technique [0002] Salt is the mother of industry and plays a very important role in the national economy. However, the traditional salt production consumes a lot of energy, produces a large amount of salt mud, and has serious environmental problems. It is urgent to develop new salt production processes. As a raw material for two alkalis, from mining salt to soda ash production, on the one hand, it has to go through five "from solid to liquid" conversions. In my country, only two alkalis consume 80 million tons of salt per year, which consumes a lot of energy; on the other hand The salt refining process produces a large amount of salt mud, and solid waste of about 2 million tons per year has become a bottleneck restricting the development of the salt industry and the chlor-alkali industry. Therefore, it is ur...

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Problems solved by technology

[0004] The technical problems to be solved by the present invention are: the existing salt making process has high energy consumption, great environmental pollution, low resource utilization rate,

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