Waste incineration fly ash resourceful treatment process and system

Abstract

The invention relates to a waste incineration fly ash resourceful treatment process and system, and belongs to the field of environmental protection and solid waste treatment. The waste incineration fly ash resourceful treatment system comprises a primary hydrothermal reaction system, a secondary washing system and a salt separation system; the primary hydrothermal reaction system comprises a reaction kettle, a waste incineration power plant waste hot water pipeline, a fly ash and slag pipeline and an oxygen pipeline, and the waste incineration power plant waste hot water pipeline, the fly ash and slag pipeline and the oxygen pipeline are correspondingly communicate with the reaction kettle; the secondary washing system comprises a primary dehydration system, a secondary washing system and a secondary dehydration system, the primary dehydration system correspondingly communicates with the reaction kettle and the salt separation system, and the secondary dehydration system correspondingly communicates with the reaction kettle and a waste incineration power plant membrane treatment system through two pipelines. In-situ heat extraction (waste heat of the waste incineration power plant), local material utilization (incineration fly ash and slag) and in-situ treatment (treatment of secondary washing water by using the waste incineration power plant membrane system) are achieved, the treatment cost is reduced, and the treatment efficiency is improved. Heavy metal, dioxin and chloride ions are comprehensively treated, and resource utilization is achieved.

Description

technical field [0001] The invention belongs to the field of environmental protection and solid waste treatment, and relates to a waste incineration fly ash recycling process and system. Background technique [0002] The rapid economic development and the acceleration of urbanization have resulted in the continuous growth of the number and scale of cities, and the consequent increase of municipal solid waste has also increased year by year. Waste incineration power generation technology can maximize the reduction, harmlessness and recycling of domestic waste, and also has the advantage of occupying less land resources. It has become the main treatment method for urban domestic waste in the world. [0003] In the process of disposing of garbage, domestic waste incineration plants will produce incineration fly ash, which accounts for about 3-5% of the garbage disposal volume. Incineration fly ash refers to the residue collected in the waste incineration flue gas purification ...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a waste incineration fly ash recycling process and system to solve the problems of long reaction time, low reaction efficiency, high energy consumption in the heating and heat preservation process, high price of conditioner and other problems in the prior art. Difficulty in removing soluble salts from incineration fly ash

Images