Composite calcium-based solid desulfurizer and production method thereof

Abstract

The invention relates to a solid desulfurizer and a production method thereof, in particular to a composite calcium-based solid desulfurizer which is prepared from industrial waste residues and the production method thereof. The desulfurizer is prepared by the following steps of: directly mixing carbide slag slurry, dicyandiamide slag serving as a modifier, a chemical drying agent and magnesium slag powder which serves as another modifier; stirring and mixing; performing wet milling to prepare slurry; performing dry milling to prepare powder; and sieving. The prepared composite calcium-based solid desulfurizer is mainly compounded by calcium hydroxide or calcium hydroxide and calcium carbonate, wherein the desulfurizer contains an active magnesium oxide component, integrates the characteristics of a single calcium base or a magnesium-based desulfurizer and has composite effects. Moreover, the desulfurizer has the characteristics of saving a large amount of energy, protecting environment and reducing the cost of a flue gas desulfurizer, along with cheap and wide raw material resource, large amount of doped magnesium slag, carbide slag and dicyandiamide slag, no heat source, high dehydration speed, stable physical performance and the like; in addition, the desulfurizer has the advantages of small equipment investment, low operation cost, capability of eliminating the damage of limestone exploitation to the environment and the like.

Description

technical field [0001] The invention relates to a solid desulfurizer and a production method thereof, in particular to a composite calcium-based solid desulfurizer produced by utilizing industrial waste residues and a production method thereof. Background technique [0002] At present, the desulfurizers used in thermal power plants and coal-fired boilers all use calcium carbonate matrix or magnesium oxide matrix powder or slurry, such as limestone, lime, magnesite, magnesium oxide, etc. For this reason, my country needs to consume a large amount of limestone every year , magnesite and other resources. At the same time, due to the need to pulverize or calcine the above resources, on the one hand, it needs to consume electricity and coal, and on the other hand, the cost of the product is getting higher and higher. [0003] Reducing the discharge of pollutants in the field of coal-based chemical industry and promoting the recovery and reuse of energy or resources are major issue...

AI Technical Summary

Problems solved by technology

[0008] The second purpose of the present invention is to solve the problems of high production cost and high transportation cost of the current single use of calcium-rich industrial secondary calcium-based slag, and provide a method that saves energy, protects the environment, and reduces the production of solid calcium-based desulfurizers. cost, and can effectively utilize the method of the composite calcium-based solid desulfurizer produced by calcium-rich industrial secondary calcium-based slag