Rubbish flying ash cement kiln co-treatment and water resource utilization system

Abstract

The invention relates to a rubbish flying ash cement kiln co-treatment and water resource utilization system. Washing water generated by a rubbish incineration flying ash three-level washing desalination system enters a coagulating sedimentation heavy metal removal system; a solution obtained by the coagulating sedimentation heavy metal removal system enters a sodium filtering and reverse osmosis pre-concentration system, wherein the salt content of the solution ranges from 1% to 2%; calcium and magnesium ions in the washing water are removed through the sodium filtering and reverse osmosis pre-concentration system, the solution with the salt content ranging from 1% to 2% is concentrated into a solution with the salt content ranging from 6% to 8%, and the solution with the salt content ranging from 6% to 8% is conveyed to a membrane distillation concentration system to circulate and generate distilled water for membrane component backwashing and rubbish incineration flying ash washing water replenishing; a nearly-saturated solution, with the salt content ranging from 20% to 30%, generated by the membrane distillation concentration system enters an infinitesimal abraum salt removal system for abraum salt removal and finally enters an MVR evaporative crystallization system for evaporative crystallization. The system is a device for carrying out cement kiln co-treatment on rubbish incineration flying ash, and therefore resource utilization can be achieved.

Description

Technical field: [0001] The invention relates to the field of garbage fly ash disposal, and more specifically relates to a waste fly ash cement kiln co-processing and water resource utilization 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...

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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