Water-washing pretreatment and cement kiln cooperated recycling disposal system for garbage fly ash

Abstract

The invention belongs to the technical field of treatment and disposal of solid wastes and particularly relates to a water-washing pretreatment and cement kiln cooperated recycling disposal system for garbage fly ash. The system comprises a fly ash conveying unit, a fly ash treatment system, a wastewater treatment system and a cement kiln treatment unit which communicate with one another sequentially; the fly ash conveying unit is used for conveying the fly ash to the fly ash treatment system; the fly ash treatment system is used for removing chloride ions and heavy metals from the fly ash; the wastewater treatment system is used for treating fly ash washing wastewater so as to enable the treated fly ash washing wastewater to reach the standards and recycle the wastewater, and meanwhile, extracting industrial salts with application value from the wastewater; and the cement kiln treatment unit is used for carrying out high-temperature calcination on the treated fly ash so as to decompose harmful ingredients such as dioxin and stable heavy metals in the fly ash, and meanwhile, generating clinker for manufacturing cement. The technical problem in the prior art that the chloride ions and the heavy metals in the fly ash will cause damage to a cement kiln when the fly ash serves as a production raw material for the cement is solved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and disposal, and in particular relates to a waste fly ash water washing pretreatment and cement kiln collaborative resource disposal system. Background technique [0002] With the rapid development of China's social economy, the acceleration of urbanization and the improvement of people's living standards, the discharge of urban domestic waste in my country has also continued to increase, basically at an average annual rate of 8% to 10%. The rapid generation of waste has seriously affected the living environment of human beings and the sustainable development of cities, and incineration technology has become the most effective means of domestic waste disposal, so the waste fly ash produced by waste incineration has also increased. Since waste incineration fly ash contains a variety of harmful heavy metals and soluble salts such as Cd, Pb, Zn, and Cr that can be easily leached by wate...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a waste fly ash washing pretreatment and cement kiln collaborative resource disposal system, which alleviates the generation of chloride ions and heavy metals in the fly ash to the cement kiln when fly ash is used as a raw material for cement production in the prior art. disruptive technical issues

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