Environmentally-friendly chemical sewage treatment system

Abstract

The invention discloses an environmentally-friendly chemical sewage treatment system. Sewage is fed into an internal circulation reactor by a sewage treatment pipe, an ozone catalytic ozonation agent is added into the internal circulation reactor and is used for ozone catalytic ozonation, the reactor is divided into a lifting zone and a dropping zone, the liquid in the reactor can be recycled in the two zones by being pushed by gas, the mixed gas fully contacts with the reaction liquid and is dissolved in the reaction liquid in the lifting zone in a micropore aeration way, the gas and liquid drive a solid light catalyst to circulate between the two zones, after a circulation mixing reaction for 12h, the treated water is subjected to concussion treatment, and purified water is output. The environmentally-friendly chemical sewage treatment system greatly improves a replacement rate of gas and liquid on the catalyst surface. The reactor effectively improves an ozone utilization rate, improves time of contact between organic matters and ozone and improves deep treatment efficiency.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to an environment-friendly chemical sewage treatment system. Background technique [0002] Chemical wastewater belongs to high-concentration and refractory organic wastewater. At present, the A2 / O process is generally used for treatment, but the effluent has high chroma and COD cr , NH 3 -N often exceeds the standard, it is difficult to discharge up to the standard, and there are still many harmful organic substances that are difficult to degrade in the water. Therefore, in recent years, the research on the advanced treatment of this type of wastewater has become a hot spot. While meeting the discharge requirements of the effluent through advanced treatment, it can reduce harmful substances in the water and improve the water reuse rate, which has extensive ecological and economic significance. Contents of the invention [0003] According to the deficiencies in the above-mentioned pri...

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Problems solved by technology

[0002] Chemical wastewater belongs to high-concentration and refractory organic wastewater. At present, the A2 / O process is generally used for treatment, but the effluent has high chroma and COD cr , NH 3 -N often exceeds the standard, it is difficult to meet the discharge standard, and there are still many harmful organic substances that are difficult to degrade in the water