Sulfur-containing waste gas desulfurization emulsion as well as preparation method and application thereof

Abstract

The invention discloses a sulfur-containing waste gas desulfurization emulsion as well as a preparation method and application thereof. The sulfur-containing waste gas desulfurization emulsion comprises secondary zinc oxide powder, water and oil, wherein the mass concentration of the secondary zinc oxide powder in the emulsion is 5-30 wt%, and the volume ratio of the water to the oil is (1-10): 1. The preparation method comprises the steps that the secondary zinc oxide powder, the water and the oil are mixed and emulsified. According to the application, sulfur-containing waste gas is introduced into a desulfurization emulsion for desulfurization. The zinc hypoxide powder is used as an emulsifier to form an emulsion with water and oil, and the emulsion system is stable; the preparation method of the desulfurization emulsion is simple and convenient, is high in operation feasibility, and can be well suitable for industrial production; and when sulfur-containing waste gas is treated, the emulsion serves as an absorbent, the absorption effect is good, the absorption rate of sulfur dioxide is greater than or equal to 99.3 wt%, sulfur dioxide can react with zinc hypoxide to generate a zinc sulfite by-product, the purpose of sulfur dioxide waste gas treatment is achieved, the economic value of the zinc sulfite by-product can be recycled, and the overall process is high in economic benefit.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a sulfur-containing waste gas desulfurization emulsion and a preparation method and application thereof. Background technique [0002] During the production process of the coal-fired thermal power industry and the non-ferrous metallurgy industry with sulfide ore as raw material, a large amount of low-concentration sulfur dioxide waste gas with no value for acid production will inevitably be produced. This kind of sulfur dioxide waste gas is currently the most serious cause of air pollution. One of the serious industrial waste gas, it is also difficult to effectively control the industrial waste gas. The technology and equipment to control low-concentration industrial sulfur dioxide flue gas pollution have become an important subject of industrial technologies such as the realization of clean production of many industrial products, environmental protection,...

AI Technical Summary

Problems solved by technology

Zinc oxide does not need to be purchased as an absorbent. It can use the smoke, waste residue and waste electrolyte produced during the lead-zinc smelting process. The zinc sulfate solution and solid residue produced can be returned to the relevant workshops in the factory for reuse, and no waste is discharged outside. Especially suitable for flue gas desulfurization in lead and zinc smelting enterprises, but the absorption equipment, filter equipment and pipelines are prone to blockage, which affects the production of the system

[0008] Therefore, from the perspective of cost and desulfurization by-products, the existing lime (stone) / gypsum desulfurization method, sodium-calcium double-alkali method, magnesium hydroxide hair, ammonia-ammonium sulfate method and zinc oxide absorption method and other traditional low-concentration The way to remove sulfur dioxide is not very ideal. It is necessary to develop a low-cost desulfurization product that can produce high value-added by-products

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