High-mineralization degree mine water treatment method and system

Abstract

The invention relates to the field of mine water treatment, in particular to a high-mineralization degree mine water treatment method and a high-mineralization degree mine water treatment system. Thehigh-mineralization degree mine water treatment method comprises a mine water membrane concentration process and an evaporation crystallization and salt separation process, wherein in the mine water membrane concentration process, after two-stage concentration, disc tube reverse osmosis is then carried out, so that the salt content of concentrated water reaches 5-8%, and the construction scale, the investment cost and the running cost for the subsequent evaporation crystallization of concentrated salt water are reduced; and in the evaporation crystallization and salt separation process, a cocurrent three-effect evaporation and freezing crystallization process is adopted. The operating flexibility is high; and not only can final production of industrial sodium sulfate and sodium chloride with relatively high quality and a small amount of impurity salt be guaranteed, but also the high-mineralization degree mine water treatment method and the high-mineralization degree mine water treatment system can be applied to treatment of water quality with a wider change range.

Description

technical field [0001] The invention relates to the field of mine water treatment, in particular to a method and system for treating mine water with high salinity. Background technique [0002] The existing mine water near "zero discharge" technology adopts advanced treatment system, concentrated brine treatment system and evaporation and crystallization salt separation system. The re-concentration system, and then the ultra-concentrated brine produced by the second concentration passes through the heat exchange system, oxygen removal system, and evaporation crystallization separation system to achieve near-zero discharge of water resources in the entire mine. [0003] The advanced treatment of existing mine water achieves zero discharge, and usually directly evaporates concentrated water, which is large in scale, high in investment and high in operating costs, and is very uneconomical. Moreover, when the influent water quality changes, the product quality of the evaporativ...

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Problems solved by technology

[0003] The advanced treatment of existing mine water achieves zero discharge. Usually, the concentrated water is directly evaporated, which is large in scale, high in investment and high in operating costs, and is very uneconomical.

Moreover, when the influent water quality changes, the product quality of the evaporation crystallization system is unstable, and a large amount of miscellaneous salt is produced.

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