Method for concentrating high-concentration brine

Abstract

The invention discloses a method for concentrating high-concentration brine. The brine is treated in a circulating efficient sedimentation zone, a circulating ultra-filtration zone, a nano-filtration zone and a high-salt reverse osmosis zone; the method is suitable for treating thick brine of which the salt content is 1-5%; to-be-treated water enters the circulating efficient sedimentation zone firstly and is stirred uniformly by a stirrer in the circulating efficient sedimentation zone, and temporarily hard ions are removed by adding lime, wherein the lime adding quantity is determined according to the temporarily hard level of the to-be-treated inlet water; then the water enters the circulating ultra-filtration zone, water is produced by membrane hole filtration during circulating ultra-filtration, and suspended solid granules are reserved in backflow liquid; a double-circulation operating manner is adopted in the nano-filtration zone, and a part of concentrated water flows back to the circulating efficient sedimentation zone and is further settled; and the other part of concentrated water flows back to the nano-filtration zone as inlet water, and the water produced in the nano-filtration zone enters the high-salt reverse osmosis zone and is concentrated by a reverse osmosis membrane and further desalted by high-salt reverse osmosis.

Description

technical field [0001] The invention relates to an industrial concentrated brine reuse treatment device, in particular to a method for concentrating high-concentration brine. Background technique [0002] my country is a country with a shortage of water resources. The per capita water resources are only 1 / 4 of the world's per capita. The shortage of water resources has become an important factor restricting the sustainable development of cities in our country. On the other hand, with the development of my country's industry, the discharge of industrial wastewater is increasing, which poses 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] At present, the reverse osmosis method has become a standard meth...

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

Images