A method for concentrating high-concentration brine

Abstract

A method for concentrating high-concentration brine, comprising the following steps: using a circulating high-efficiency precipitation zone, a circulating ultrafiltration zone, a nanofiltration zone, and a high-salt reverse osmosis zone for treatment; it is suitable for the treatment of concentrated brine with a salt content of 1% to 5%; The treated water enters the circulating high-efficiency sedimentation zone, and is stirred and mixed evenly by the agitator in the circulating high-efficiency sedimentation zone. The temporary hardness ions are removed by adding lime. The dosage of lime is added according to the temporary hardness of the influent water to be treated; When entering the circulating ultrafiltration, the product water is filtered through the membrane pores, and the suspended solid particles remain in the reflux liquid; the nanofiltration area adopts a double-circulation operation mode, and part of the concentrated water is returned to the circulating high-efficiency precipitation area for further precipitation; part of the concentrated water is returned to the nanofiltration area. The water enters the filter area, and the water produced in the nanofiltration area enters the high-salt reverse osmosis area to be concentrated by the reverse osmosis membrane, and further desalted through the high-salt reverse osmosis.

Description

technical field [0001] The invention relates to an industrial concentrated brine reuse treatment device, in particular to a high-concentration brine concentration method. Background technique [0002] my country is a country with a shortage of water resources. The per capita water resources occupancy is only 1 / 4 of the world's per capita occupancy. The shortage of water resources has become an important factor restricting the sustainable development of cities in my country. On the other hand, with the development of my country's industry, the discharge of industrial wastewater continues to increase, posing a serious threat to the ecological environment. Therefore, there is an urgent need to recycle industrial wastewater and urban drainage to turn waste into treasure, which will bring triple benefits to my country in alleviating water shortages, saving water production costs, and protecting the ecological environment. [0003] The reverse osmosis method has now become a stan...

AI Technical Summary

Problems solved by technology

[0004] Due to the high salt content of concentrated brine, traditional water supply and drainage treatment cannot effectively solve this problem

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