Fly ash harmless treatment resource recycling device and treatment method

Abstract

The invention relates to a fly ash harmless treatment resource recycling device and treatment method, which includes a solid-phase catalytic dechlorination and detoxification and dioxin removal system connected in sequence, a three-stage water elution and desalination system for waste incineration fly ash, and a heavy metal removal system , membrane distillation concentration system and salt crystallization system; solid-phase catalytic dechlorination and detoxification removal system to remove dioxins from fly ash; waste incineration fly ash three-stage water elution salt system will remove dioxins from fly ash A large amount of salt is removed, and there are still some heavy metal residues in the three-stage water washing filtrate after washing; the heavy metal removal system removes a large amount of calcium and magnesium ions and a small amount of heavy metal ions contained in the three-stage water washing filtrate, and obtains the supernatant after removing heavy metals; The membrane distillation concentration system distills the supernatant to produce water for reuse, and generates a concentrate; the salt crystallization system evaporates and crystallizes the concentrate to obtain 7% crystalline salt and condensed water. The invention can harmlessly treat the fly ash and realize resource utilization.

Description

Technical field: [0001] The invention relates to the field of garbage fly ash treatment, and more specifically relates to a fly ash harmless treatment resource recycling device and a treatment method. Background technique: [0002] Fly ash is the residue of waste incineration, and 90% of the carcinogen "dioxin" produced by waste incineration is in the fly ash. Improper handling of fly ash that has not been solidified, and a large amount of heavy metals and dioxins in it will cause serious pollution accidents and endanger the health of residents. At present, only a few cities across the country are dealing with waste incineration fly ash. On the one hand, the cost of fly ash disposal is very high. On the other hand, due to the unregulated market, insufficient supervision and vicious competition, the "fly ash" is in a state of "flying randomly". If fly ash cannot be safely disposed of, it will be a great hidden danger to the environment. Invention content: [0003] The o...

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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