Method for treating fluorine-containing initial rainwater through coagulating sedimentation-adsorption

A technology for initial rainwater and adsorption treatment, applied in sedimentation treatment, flocculation/sedimentation water/sewage treatment, filtration treatment, etc., can solve the problem of high power consumption, low exchange capacity of ion exchange resin method and low fluorine removal efficiency, and water production cost. higher question
CN107673518AInactive Publication Date: 2018-02-09KUNMING ENG & RES INST OF NONFERROUS METALLURGY +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING ENG & RES INST OF NONFERROUS METALLURGY
Publication Date
2018-02-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for treating fluorine-containing initial rainwater through coagulating sedimentation-adsorption. Lime milk is added to adjust the pH to be alkaline, calcium chloride and aluminum oxide powder are added and mixed, an aluminum salt coagulant and a coagulant aid are added, and reaction precipitates can be reused or discharged after being filtered by a multi-media filter and a secondary activated aluminum oxide filter. The invention provides the stable and efficient method for treating the fluorine-containing initial rainwater to eliminate the current situation that the content of a large quantity of initial rainwater fluorides produced in initial rainwater produced by fluorine salt using enterprises exceeds the standard and the environmental protection requirement cannot be met. The method is applied to occasions with the fluorine-containing initial rainwater fluoride concentration not exceeding 200 mg / L, and the effluent fluoride concentration can be controlled at 1 mg / L.
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Description

technical field

[0001] The invention relates to a method for treating initial fluorine-containing rainwater by coagulation, sedimentation and adsorption, and belongs to the technical field of sewage treatment. Background technique

[0002] Fluorine in nature is in a compound state, mainly including: fluorite, fluoroapatite, cryolite and so on. They are all important chemical raw materials, widely used in aluminum electrolysis, steel, cement, bricks, ceramics, phosphate fertilizers, glass, semiconductors, pharmaceuticals and other industrial production. The common feature of these industries is that fluorine-containing minerals are used as the main raw material or auxiliary raw materials. During the smelting and production process, fluorine decomposes from the minerals and enters the environment, causing fluorine pollution. The outstanding performance is that the fluorine content in the initial rainwater of these industries exceeds the standard. The fluorine ion is a first-c...

Claims

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