Electrolysis catalysis coupling high-grade oxidization treatment method and device for organic matters in high-salt waste water

Abstract

The invention discloses an electrolysis catalysis coupling high-grade oxidization treatment method and device for organic matters in high-salt waste water. The method comprises the following steps ofperforming oil removal and filtering on industrial waste water by a coarse filter; clearing suspended matters and colloid substances in the waste water; conveying the industrial waste water subjectedto the coarse filtering into a tubular reactor; under the condition of introducing hydrogen peroxide and ozone, exerting voltage being 5 to 24V between the tube body and a negative electrode for electrolysis catalysis oxidization; detecting the COD content of the waste water in the outlet end through a sampling opening; discharging the water when the preset index is reached; conveying the waste water subjected to the electrolysis catalysis oxidization into an crystallizing evaporator for evaporation concentration crystallization; performing centrifugation and drying recovery on the concentrated crystals to obtain industrial salt; conveying a gas phase of the crystallizing evaporator into a biochemical device for biochemical treatment after the condensing; performing discharging or recoveryutilization after the discharge standard is met. The organic matters in the waste water is effectively degraded in an electrolysis oxidization coupling high-grade catalysis oxidization mode; the industrial salt is recovered.

Description

technical field [0001] The invention belongs to the technical field of environmental protection chemical industry, and in particular relates to treatment equipment and a treatment method for waste water containing refractory phenolic sodium salt. Background technique [0002] With the rapid development of my country's industry, sewage discharge is increasing, and a large number of chemicals that are difficult to biodegrade are discharged into the environment in the form of wastewater, causing serious pollution of water resources, which has become a pain point and focus of social development. Especially the anhydrous discharged from coking, petrochemical, printing and dyeing, pharmaceutical, organic synthesis and other industrial production processes contains a large amount of toxic organic matter and high concentration of salt, such as sodium sulfate, sodium chloride, sodium nitrate, copper sulfate, etc., making it impossible to pass directly The biochemical treatment method...

AI Technical Summary

Problems solved by technology

Especially the anhydrous discharged from coking, petrochemical, printing and dyeing, pharmaceutical, organic synthesis and other industrial production processes contains a large amount of toxic organic matter and high concentration of salt, such as sodium sulfate, sodium chloride, sodium nitrate, copper sulfate, etc., making it impossible to pass directly The biochemical treatment method needs to crystallize and separate the industrial salt in the wastewater, and then perform biochemical treatment, resulting in toxic industrial waste salt, which cannot be used as a resource for industrial salt; at the same time, because the organic matter in the wastewater contains formaldehyde, alcohols, and Phenolic substances that are difficult to degrade and have a high boiling point cannot be treated by conventional catalytic oxidation, and for salty wastewater, the salt obtained by distillation and crystallization is waste salt, which cannot be recycled

As a newly developed oxidation method, advanced oxidation can obtain free radicals with extremely strong oxidizing ability by screening suitable catalysts, and oxidize macromolecular organic wastes with high bond energy in water into easily degradable and low-toxic small molecules, but its catalyst and core process technology All are imported from abroad, the cost is high, which is not conducive to the development of domestic sewage treatment technology

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