Method and device for realizing zero emission of strong brine

A technology of concentrated brine and zero discharge, applied in water softening, chemical instruments and methods, water pollutants, etc., can solve the problems of high cost and great harm of crystalline miscellaneous salts, and achieve convenient source of medicament, high concentration multiple, The effect of mild reaction conditions
CN105541017AActive Publication Date: 2016-05-04GO HIGHER ENVIRONMENT GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GO HIGHER ENVIRONMENT GRP CO LTD
Publication Date
2016-05-04

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Abstract

The invention provides a method and a device for realizing zero emission of strong brine, overcoming the defects that the existing strong brine treatment technology is high in crystallized impurity salt treatment cost and severe in harm. The impurity removal, softening, pre-oxidation, biochemical and strong oxidation techniques are used for purifying the strong brine, the strong brine after being treated is pre-concentrated by adopting a reverse osmosis way, the reverse osmosis concentrated water is further purified by adopting an adsorption method, and finally the evaporation and quality-divided crystallization technology is used for separating the water to obtain industrial salt. By adopting the method and device, the zero emission of the strong brine is realized, the emission of dangerous waste is reduced, and the recycling is realized. Meanwhile, the general process is mature, the design is reasonable, the impact load resistance is relatively high, the chemical source is convenient, and the cost is low.
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Description

technical field

[0001] The invention relates to the field of wastewater treatment, in particular to a method and device for zero discharge of concentrated brine. Background technique

[0002] Coal chemical, petrochemical and other chemical concentrated brine mainly comes from circulating sewage, chemical water station drainage, and two-stage reverse osmosis concentrated water from reclaimed water reuse devices. Its composition is complex, including inorganic salts, organic matter, and a small amount of chemicals used in pretreatment, desalination, etc., such as scale inhibitors, acids, and other reaction products. The TDS content of concentrated brine is generally 10,000-50,000mg / L, mainly containing inorganic cations such as sodium, potassium, calcium, magnesium, aluminum, and inorganic anions such as chloride, sulfate, and nitrate ions. In addition, heavy metals mainly include arsenic, barium, Cadmium, lead, copper, zinc, etc. Another feature of concentrated brine is that...

Claims

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