Treatment system and treatment method for activated carbon desulfurization and denitrification acid-making wastewater

Abstract

The invention provides a treatment system and method of activated carbon desulfurization and denitrification acid-making wastewater. The treatment system comprises a sludge concentration device, a chemical precipitation hardness removal device, an electronic flocculation device, a clarification precipitation device, a membrane treatment device and an evaporation device, the treatment method comprises the following steps: introducing the acid-making wastewater into a sludge concentration device, stirring and concentrating, introducing the acid-making wastewater into a chemical precipitation hardness removal device, adding alkali liquor and a hardness removal agent, carrying out stirring and reaction precipitation, then sequentially introducing the acid-making wastewater into an electronic flocculation device and a clarification and precipitation device for precipitation, introducing the acid-making wastewater into a membrane treatment device to further remove suspended matters, finally,adding alkali liquor into the acid-making wastewater and evaporating to obtain crystalline salt and ammonia-containing gas. According to the treatment system and the treatment method, the activated carbon desulfurization and denitrification acid-making wastewater can be effectively treated, and various harmful substances in the acid-making wastewater are removed step by step.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment system and method for activated carbon desulfurization and denitrification acid production wastewater. Background technique [0002] Activated carbon desulfurization and denitrification flue gas purification technology has become one of the most widely used ultra-low emission flue gas purification technologies for iron and steel smelting due to its advantages of simultaneous desulfurization, denitrification, dust removal, heavy metal removal, and dioxin removal. Widely recognized in the industry. [0003] The activated carbon desulfurization and denitrification purification process uses the principle of activated carbon adsorption to recover SO in the flue gas. 2 And for the production of sulfuric acid. using SO 2 During the preparation of industrial sulfuric acid, acidic waste water is produced. The source of acid wastewater is the purific...

AI Technical Summary

Problems solved by technology

[0005] The acid-making wastewater must meet the direct discharge standard in the Discharge Standards of Water Pollutants for the Iron and Steel Industry (GB13456-2012), but the pollution factors of this type of wastewater are complex and the concentration is high. Currently, there is no good treatment system for this type of acid-making wastewater. operation, it is more difficult to meet this standard

Wastewater is rich in complex factors such as fluoride ions, chloride ions, ammonia nitrogen, sulfate ions and COD, which are highly corrosive and difficult to recycle.

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