A method and device for reusing activated carbon to treat multi-pollutant flue gas and waste water

Abstract

A method for treating multi-pollutant flue gas and waste water reuse with activated carbon, the method comprising the following steps: 1) adsorption of multi-pollutant flue gas: treating multi-pollutant flue gas with activated carbon to obtain adsorbed saturated activated carbon; 2) activated carbon Thermal regeneration: heating saturated activated carbon to high temperature for thermal regeneration; 3) SRG gas treatment: SRG gas generated by thermal regeneration of activated carbon is subjected to wet scrubbing to obtain high-sulfur gas and acidic scrubbing wastewater; 4) High-sulfur gas treatment: steps 3) The obtained high-sulfur gas recovers sulfur resources through the sulfur resource recovery process; 5) Acid washing wastewater treatment: Step 3) The acid washing wastewater obtained is filtered through acid to obtain clear liquid and carbon powder; 6) Subsequent treatment of clear liquid: the The clear liquid obtained in step 5) passes through an oxidation process, and then undergoes a flocculation and sedimentation process to obtain metal-containing sludge and salt-containing wastewater. The method of the invention can treat secondary pollutants well, turn waste into treasure, reuse, save cost, recycle resources, and protect the environment.

Description

technical field [0001] The invention relates to a method for treating multi-pollutant flue gas, in particular to a method and device for reusing activated carbon to treat multi-pollutant flue gas and waste water. It belongs to the field of resource and environment protection. Background technique [0002] In conventional iron and steel, electric power, non-ferrous metals, petrochemical, chemical or building materials industries, due to the variety of raw materials used, various pollutants are often produced, such as SO 2 , NOx, dust, VOCs, heavy metals, etc. With the increasingly stringent national environmental protection regulations and standards, in addition to the main pollutants, strict limits have been gradually imposed on the discharge of various secondary pollutants. For example, the "Steel Sintering and Pelletizing Industry Air Pollutant Emission Standards" (GB28662-2012) promulgated and implemented by the Ministry of Environmental Protection in 2012 added emissio...

AI Technical Summary

Problems solved by technology

[0005] Although the activated carbon flue gas control technology can realize the coordinated removal of multiple pollutants, in fact, the pollutants are only enriched through adsorption-desorption, and there is a problem of secondary pollution.

For example, the charcoal powder produced in the adsorption and desorption process has not been effectively used, the desorption gas washing wastewater has not been effectively treated, and the high concentration sulfur dioxide flue gas generated after desorption is not up to the standard after the sulfur resource recovery, which seriously limits the activated carbon smoke. Popularization and Application of Gas Control Technology

Due to the relatively short period of industrial use of activated carbon flue gas control technology in China, the above-mentioned problems are relatively new and difficult to deal with. There is no process technology that can be used for reference in the world, and completely independent innovation is urgently needed

Images