Cement kiln co-processing system for waste incineration fly ash

Abstract

The invention relates to a cement kiln co-processing system for waste incineration fly ash. Washing water generated by a waste incineration fly ash three-stage washing desalination system enters a coagulating sedimentation heavy-metal removal system through a pipeline; a solution with the salt content of 1-2 percent, obtained by the coagulating sedimentation heavy-metal removal system, enters a sodium filtration and reverse osmosis pre-concentration system; and the sodium filtration and reverse osmosis pre-concentration system removes calcium and magnesium ions in washing water and concentrates the solution with the salt content of 1-2 percent into a concentrated liquor with the salt content of 6-8 percent, which is conveyed into a slight trace carnallite removal system for carnallite removal, and finally, a nearly saturated liquid enters an MVR (Mechanical Vapor Recompression) evaporative crystallization system for evaporative crystallization. The cement kiln co-processing system for waste incineration fly ash is a device for cement kiln co-processing of waste incineration fly ash, can dispose a great amount of fly ash, is high in cement output, realizes innocent treatment, and obtains industrial salt through evaporative crystallization, which is used in paper making process, snow-melting agents and the chlor-alkali industry.

Description

Technical field: [0001] The invention relates to the field of garbage fly ash disposal, in particular to a garbage fly ash cement kiln cooperative disposal system. Background technique: [0002] With the development of social economy and the intensification of urbanization process, many large and medium-sized cities in my country are troubled by "garbage siege". There are three ways of waste disposal: landfill, incineration and composting. At present, landfill is the main method of waste disposal in my country, supplemented by composting and incineration, which will occupy a large amount of land resources. With the rise of land prices and the continuous improvement of urban environmental requirements, garbage landfill has become uneconomical and safe, and more and more cities have begun to consider garbage incineration. Incineration treatment can reduce the volume of urban garbage by 80-90%, and the waste residue produced can be used as resources. [0003] Fly ash is the r...

AI Technical Summary

Problems solved by technology

On the one hand, the cost of fly ash disposal is high

On the other hand, due to the unregulated market, inadequate supervision and vicious competition, the "fly ash" is in a state of "flying randomly".

If fly ash cannot be disposed of safely, it will be a great hidden danger to the environment

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