Waste incineration fly ash molten salt heat treatment system

Abstract

The invention relates to the field of waste incineration fly ash treatment, in particular to a waste incineration fly ash molten salt heat treatment system. The waste incineration fly ash molten saltheat treatment system comprises a raw material feeding system, a fly ash heat treatment system, a discharging control system, a waste heat recycling system and a smoke gas purification system. The rawmaterial feeding system comprises a molten salt storage bin, a fly ash storage bin and a supply device; the fly ash heat treatment system comprises a reaction furnace, an electric heating bar, a stirrer and a temperature controller; the discharging control system comprises a liquid level sensor, a density sensor, a constant temperature cinder ladle, a centrifugal granulator and a catcher; the waste heat recycling system comprises a heat conduction oil heat exchanger, a hot oil circulation pump and a matching pipeline; the smoke gas purification system comprises an induced draft fan and a purification device; fly ash resource recycling and detoxification treatment is achieved synchronous with fly ash molten salt heat treatment, and through tail gas purification, intelligent slag discharging and molten slag waste heat recycling, energy saving emission reduction and product deep resource utilization in the fly ash heat treatment process can be promoted.

Description

technical field [0001] The invention relates to the field of waste incineration fly ash treatment. More specifically, the invention relates to a molten salt heat treatment system for waste incineration fly ash. Background technique [0002] Waste incineration fly ash is a dangerous solid waste rich in pollutants such as dioxins and heavy metals. At present, the treatment method of waste incineration fly ash in my country is mainly solidified landfill. However, the solidified fly ash has obvious problems of volume increase and weight gain, which wastes a lot of valuable land resources, and at the same time, it is impossible to recycle the abundant metals and other resources in the fly ash. [0003] The molten salt heat treatment method of waste incineration fly ash is a new type of fly ash treatment technology. Compared with traditional heat treatment methods such as sintering and melting of fly ash, molten salt heat treatment can greatly reduce the temperature of fly ash he...

AI Technical Summary

Problems solved by technology

[0005] The difference in density between fly ash and molten salt during heat treatment causes some components of fly ash to float on the surface of molten salt, which is not conducive to the dissolution and recovery of fly ash components

[0006] The solidified molten salt products and slag products after heat treatment have a hard surface, and are very easy to absorb water and moisture and are corrosive, difficult to separate, and complicated processes

Images