Apparatus for combined processing of high-salinity high-COD sewage and processing method

Abstract

The invention relates to an apparatus for combined processing of high-salinity high-COD sewage and a processing method. The sewage is subjected to a pre-treatment stage; after the pH value of the pre-treated sewage is adjusted to form an alkaline environment, the pH-adjusted sewage directly enters an oxidation evaporation reactor, so that organics in the pH-adjusted sewage are oxidized into carbon dioxide and water; and during sewage evaporation, salts in the sewage are concentrated and precipitate out through crystallization, thus the sewage in a semi-solid state enters a subsequent sludge roasting device for roasting, a very small amount of roasted inorganic salt ash can be processed as an ordinary solid waste or can be utilized by secondary recovery through re-purification technology. Through the processes of advanced oxidation, evaporation condensation and sludge roasting, organics in the sewage are oxidized to reduce the COD index, the salts in the sewage are concentrated and precipitate out through crystallization so as to facilitate forming of the semi-solid sludge, the evaporation-precipitated semi-solid sludge is subjected to roasting for harmless processing, so that a state is truly achieved that the sludge precipitated from the sewage is harmlessly processed while the sewage is processed.

Description

technical field [0001] The invention relates to a treatment device for combining physical adsorption technology + advanced oxidation technology + evaporation technology to treat high-salt (salt content 1%-20%) and high-COD sewage (COD index between 10000mg / L and 200000mg / L) The invention relates to a treatment method and belongs to the technical field of sewage treatment. Background technique [0002] With the rapid development of industry, the types and quantities of sewage have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. The difficulty of sewage treatment is also getting higher and higher. Among them, many high-salt and high-COD sewage cannot be treated up to standard by a single chemical method, biochemical method, physical method and other methods. Under such a premise, the present invention proposes a combination of physical adsorption technology + advanced oxidation technolog...

AI Technical Summary

Problems solved by technology

The difficulty of sewage treatment is getting higher and higher. Among them, many high-salt and high-COD sewage cannot be treated up to standard by a single chemical method, biochemical method, physical method, etc.

Under such a premise, the present invention proposes a combination of physical adsorption technology + advanced oxidation technology + evaporation technology + roasting technology to treat high-salt, high-COD wastewater and a treatment process, which effectively solves the problem that a single treatment method cannot meet the discharge standards problem, while also solving:

[0003] 1. Physical adsorption technology is easy to be saturated and difficult to regenerate;

[0004] 2. Advanced oxidation technology cannot quickly deal with the COD problem;

[0005] 3. The problem that hazardous waste sludge cannot be treated after evaporation

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