Sludge crystallization solidification treatment technology

Abstract

The invention relates to the field of sludge treatment, in particular to a sludge crystallization solidification treatment technology. The technology comprises the specific steps that dewatering treatment is conducted on sludge to lower the water content of the sludge to 56%-60%; the sludge is smashed; the smashed sludge is fed into a high-temperature incinerator, primary calcining is conducted at the temperature of 1,200 DEG C-1,400 DEG C, and organic contaminants in the sludge are thoroughly decomposed; the sludge obtained through primary calcining is ground to be in the size of 100 mesh; the ground sludge and Al2O3 powder are fully mixed according to the mass ratio of 1:0.36; secondary calcining is conducted on the mixed powder at the temperature of 2,000 DEG C-2,200 DEG C, and solidified matter in a crystal form is finally formed, wherein hazardous substances such as heavy metals and arsenic compounds are immobilized in the solidified matter; the solidified matter in the crystal form meets the environmental protection requirement and can be directly landfilled. The sludge crystallization solidification treatment technology is low in requirement for the source of the sludge and the components of the contained contaminants and suitable for all kinds of sludge; harmless, reduced and stabilized treatment on the sludge can be achieved.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge crystallization and solidification treatment process. Background technique [0002] In recent years, with the development of my country's coal chemical, petrochemical and other energy and chemical industries, as well as emerging technology industries such as electronic communications and medicine, a large amount of sludge generated in the process of production and pollutant treatment has become a major problem in environmental protection. Although methods such as biocomposting or chemical reduction can produce a certain treatment effect, based on the constraints of raw materials and production processes, harmful substances such as heavy metals and arsenic compounds contained in sludge cannot be filtered through mechanical pressure filtration, chemical absorption or biological treatment. The method of degradation is removed, so that the urgent situation of "siege of poison...

AI Technical Summary

Problems solved by technology

Although methods such as biocomposting or chemical reduction can produce a certain treatment effect, based on the constraints of raw materials and production processes, harmful substances such as heavy metals and arsenic compounds contained in sludge cannot be filtered through mechanical pressure filtration, chemical absorption or biological treatment. The way of degradation is to remove it, which has caused the urgent situation of "siege of poisonous mud" in many areas

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