Zinc oxide slurry for flue gas desulfurization

Abstract

The invention relates to zinc oxide slurry for flue gas desulfurization. The zinc oxide slurry contains an additive composed of alkanolamine, inorganic salt and a surfactant, wherein the weight of the additive in the zinc oxide slurry accounts for 0.05%-0.5% of the total weight of the zinc oxide slurry; the weight ratio of the alkanolamine to the inorganic salt to the surfactant in the additive is (1-2) to (0.2-0.5) to (0.5-1.5); the alkanolamine is one or the combination of two of triethanolamine and 2-amino-2-methyl-1-propanol; the inorganic salt is one or the combination of two of calcium chloride or sodium chloride; the surfactant is one or the combination of more of sodium dodecylbenzenesulphonate, Tween 80 and polyethylene glycol 20000. According to the slurry, the absorption effect on sulfur dioxide can be obviously improved and the viscosity of the zinc oxide slurry is reduced; the blocking in a production process is avoided and the pollution is further alleviated; resources are saved and the economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a zinc oxide slurry for flue gas desulfurization containing additives mixed with alkanolamines, inorganic salts and surfactants. Background technique [0002] As one of the main gases of air pollution, sulfur dioxide has attracted widespread attention. Flue gas desulfurization is an effective method to reduce sulfur emissions. Countries around the world began to study desulfurization technology in the 1950s. So far, there are more than 200 desulfurization technologies. The main methods are wet desulfurization, semi-dry desulfurization, dry desulfurization, rotary Various desulfurization processes such as spray drying desulfurization and electron beam desulfurization. At present, limestone / lime method, sodium-alkali method, renewable solvent circulation absorption method and ammonia method are commonly used at home and abroad. [0003] However, for l...

AI Technical Summary

Problems solved by technology

It can be seen that this technology closely combines the desulfurization process with the original zinc smelting process. The absorbent uses dust, waste residue and waste electrolyte containing zinc oxide in the factory, and the zinc sulfate solution and solid slag produced can be returned to the factory. The re-use of related workshops solves the problem of the source of the absorbent and the treatment of the product, maximizes the utilization of resources, reduces the working capital, and reduces the operating cost. However, it is found that the method has absorption Poor effect, high viscosity of zinc oxide slurry, easy to block and other problems, not only incomplete absorption will continue to cause environmental pollution, but also affect normal production