System and method for treating waste gas and wastewater

Abstract

The invention discloses a waste gas and waste water treating system comprising a circularly collected flue gas treatment system containing a magnesium oxide absorption liquid, an acid water neutralizing treatment system and an electrochemical treatment system, wherein an inlet of the circularly collected flue gas treatment system is connected with a fan for delivering smelting circularly collected flue gas, a waste liquor outlet of the circularly collected flue gas treatment system is communicated with an inlet of the acid water neutralizing treatment system through a pipeline provided with an absorption liquid delivery pump, a neutralization liquid discharge port of the acid water neutralizing treatment system is connected with an input end of a neutralization liquid delivery pump, an output end of the neutralization liquid delivery pump is connected with two pipelines, one pipeline is introduced into the circularly collected flue gas treatment system, and the other is introduced into the electrochemical treatment system. Acid waste water is neutralized by use of effective components in the absorption liquid and the magnesium oxide solution, one part of waste water enters the prepared magnesium oxide solution for smelting circularly collected flue gas, the water discharge of the system is reduced, the other part enters the electrochemical treatment system for deep treatment and is discharged after reaching the standard, and up-to-standard emission or recycling of the smelting circularly collected flue gas and the acid waste water is realized.

Description

technical field [0001] The invention belongs to the field of chemical production and relates to the treatment of waste gas and waste water, in particular to a treatment system and method for smelting ring collection flue gas and acid waste water. Background technique [0002] Sulphide ore smelting produces high-concentration sulfur dioxide flue gas and low-concentration ring-collecting flue gas, high-concentration sulfur dioxide flue gas, and acid wastewater produced in wet purification acid production. The treatment of waste gypsum slag and low-concentration sulfur dioxide ring collection flue gas is generally absorbed by liquid alkali, which consumes a lot of alkali and costs high. Contents of the invention [0003] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, to provide a system for treating smelting ring collection flue gas and acid wastewater by using magnesium oxide, and to realize a treatment method for smelti...

AI Technical Summary

Problems solved by technology

[0002] Sulphide ore smelting produces high-concentration sulfur dioxide flue gas and low-concentration ring-collecting flue gas, high-concentration sulfur dioxide flue gas, and acid wastewater produced in wet purification acid production. The treatment of waste gypsum slag and low-concentration sulfur dioxide ring collection flue gas is generally absorbed by liquid alkali, which consumes a lot of alkali and costs high

Images