Technology for treating inorganic fluorine-organic fluorine industrial waste water

Abstract

The invention relates to a technology for treating inorganic fluorine-organic fluorine industrial waste water. The technology comprises the following steps: introducing air into inorganic fluorine-organic fluorine industrial waste water with the inorganic fluorine content of more than 5000mg / L, so as to blow off volatile matters; if the waste water in which volatile matters are removed is low-turbidity waste water, directly carrying out UV-Fe<3+> / Fe<3+> hydrogen peroxide system oxidation defluorination; if the waste water in which volatile matters are removed is high-turbidity waste water, descending the turbid of the high-turbidity waste water to obtain low-turbidity waste water, and then carrying out UV-Fe<3+> / Fe<3+> hydrogen peroxide system oxidation defluorination; and carrying out Fe<3+>-lime-pulverized fuel ash defluorination on the waste water which is subjected to the UV-Fe<3+> / Fe<3+> hydrogen peroxide system oxidation defluorination. The technology is applicable to treatment of organic fluorine industrial waste water with high acidity and high inorganic fluorine content (F- is more than 5000mg / L); the purpose of simultaneously removing organic fluorine and inorganic fluorine pollutants is achieved by combining the organic fluorine degradation and inorganic fluorine removal.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a process for treating industrial wastewater containing inorganic fluorine-organic fluorine. Background technique [0002] Organic fluorine materials mainly include chlorofluorocarbons and their substitutes, fluorine-containing polymers and fluorine-containing fine chemicals. Organic fluorine materials have good chemical stability and thermal stability, and have excellent electrical properties. They are widely used in military industry, electronics, electrical appliances, and machinery. , chemicals and textiles and other fields, so the organic fluorine chemical industry has developed rapidly in recent years, and the global output of organic fluorine materials has increased by more than 10% annually. The Chinese government also supports the organic fluorine chemical industry as a key industry and encourages its priority development , and included it in the...

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Problems solved by technology

[0022] In order to overcome the problems in the prior art, the object of the present invention is to provide a process for treating industrial wastewater containing inorganic fluorine-organic fluorine, so that the fluorine content in the treated wastewater reaches the national standard, thereby solving the problem that the existing process cannot handle organic fluorine The problem of coexistence of waste water and high-concentration inorganic fluorine

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