Method for purifying harmful substances in wastewater and special device thereof

Abstract

The invention discloses a method for purifying harmful substances in wastewater and a special device thereof. The method is characterized in that the wastewater is compressed through a booster pump and then guided into an electrochemical reactor; after direct current or pulse current is applied to an electrode of the electrochemical reactor, electrochemical oxidation reduction reaction occurs in the electrochemical reactor, so that the harmful substances in the wastewater are degraded; the wastewater is decompressed through a water jet vacuum device and then mixed with a gas absorbed by the water jet vacuum device to form a gas-liquid mixture, and the gas-liquid mixture is guided into a gas-liquid separation tower; the gas and liquid phases simultaneously react in the gas-liquid separation tower, so that the harmful substances in the wastewater are further degraded; and the purified wastewater enters a wastewater circulating tank at the bottom of the gas-liquid separation tower, and the gas is discharged from a gas outlet on the lower part of the tower. The invention also discloses the special device, which has the advantages of reasonable and simple structure, high treatment efficiency and the like and is easy to operate and use.

Description

technical field [0001] The invention relates to a method for purifying harmful substances in waste water and a special device thereof, in particular to removing pollutants such as COD, organic matter, ammonia nitrogen and chroma from waste water, and belongs to the technical field of waste water treatment and environmental protection. Background technique [0002] With the rapid development of the chemical industry, various synthetic compounds are becoming more and more diverse, and are widely used in various production processes such as chemical, pharmaceutical, semiconductor and coating industries. After use, many of these compounds are discharged with wastewater or enter water bodies. . Many of these compounds are volatile organic compounds, most of which are poisonous, and often have the characteristics of "three causes" (carcinogenic, teratogenic, and sudden) and pose a serious threat to human health. my country's GB3838-2002 "Surface Water Environmental Quality Standa...

AI Technical Summary

Problems solved by technology

However, during this treatment process, the volatile harmful substances in the wastewater, especially the malodorous gases, such as organic substances such as toluene, formaldehyde, methanol, sulfide and amines, and inorganic substances such as hydrogen sulfide and ammonia, enter the atmosphere through volatilization, thereby Seriously affect the ecological and social environment and endanger human health

Because these volatile harmful substances have the characteristics of stable chemical structure and not easy to degrade, they bring great difficulties to environmental protection.

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