Treatment process for desulfurized wastewater

Abstract

The invention discloses a desulfurized wastewater treatment process. Firstly, NaOH or lime milk is added into the acidic desulfurized wastewater so as to adjust the pH value to be 8 to 9; then, the desulfurized wastewater is pumped into an electric flocculation treatment device by a pumpp, effluent after electric flocculation treatment enters an inclined pipe settling tank so as to be further treated, and then the treated wastewater reaching the standard is discharged or reused. The scruff discharged by the electric flocculation treatment device and the settled sludge discharged by the inclined pipe settling tank enter a sludge thickening tank so as to be further concentrated; the concentrated sludge is pumped into a sludge dewatering machine so as to be dried; and the dried sludge is shipped out for disposal, and the supernatant in the thickening tank and the filter-press fluid in the dewatering machine flow back to a regulating reservoir. The treatment process is characterized by simple flow and good treatment effect.

Description

Technical field: [0001] The invention relates to a treatment process for desulfurization wastewater. Background technique: [0002] my country is the largest coal producer and consumer in the world, and the proportion of coal in China's energy structure is as high as 76.2%. 2 90% comes from burning coal. In recent years, although my country has adopted a sewage charging policy, the annual SO 2 Emissions still exceed 20 million tons, and the area polluted by acid rain is rapidly expanding, causing huge damage to crops, forests, and human health in my country, and has also become an important factor restricting the sustainable development of my country's economy and society. Therefore, the SO 2 Emission control is imperative. [0003] In January 1998, the National Environmental Protection Agency approved the "Acid Rain Control Area and Sulfur Dioxide Pollution Control Area Division Plan" approved by the State Council with Guohan [1998] No. 5, requiring thermal power plants...

AI Technical Summary

Problems solved by technology

Various heavy metal ions in desulfurization wastewater are highly polluting to the environment, the water quality is special, and the treatment is difficult

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