Gelatinization and solidification stabilization treatment system for waste incineration fly ash

Abstract

The invention discloses a gelatinization and solidification stabilization treatment system for waste incineration fly ash and belongs to environmental engineering. The treatment system consists of a fly ash storage and metering device, a curing agent storage and metering device, a stabilizing agent storage and metering device, and a uniformly mixing and stirring and extrusion and granulating treatment device. By combining power pre-mixing and strong stirring, a stabilizing agent, a curing agent, and fly ash are promoted to be fully contacted, and the gelatinization and solidification effect of the fly ash is enhanced; based on the prestressing force enhancement principle and the chemical reaction balance principle, the treatment system realizes the accurate control over the using amount of materials by an intermittent metering mode; by introducing a roll shaft grinding granulating technology, and enhancing chemical reactions through pressure application, particles are extruded, the heavy metal in the fly ash is stabilized for a long term, the activity of the heavy metal in the incineration fly ash is greatly reduced, and the stabilized product has long-term stability in a sanitary landfill, and meets the landfill pollution control standard of domestic garbage and can enter a common sanitary landfill and is buried.

Description

technical field [0001] The invention discloses a gelling, solidifying and stabilizing treatment system for waste incineration fly ash, which belongs to the category of environmental engineering. Background technique [0002] With the rapid development of my country's economy, the composition of garbage is becoming more and more complex, the land resources are unprecedentedly tight, and the urgency of garbage reduction and disposal is very strong. The rise of a large number of waste incineration power plants has played a huge role in waste disposal and resource utilization, but at the same time, waste incineration produces a large amount of fly ash, especially the heavy metals and their compounds rich in fly ash, which are harmful to the health of urban residents. and ecological environment security pose a serious threat. Waste incineration fly ash is rich in heavy metals with high concentration and is easy to leach. It is regarded as hazardous waste and should be disposed o...

AI Technical Summary

Problems solved by technology

Moreover, the fly ash disposal process used by most waste incineration power plants is very rough and simple, mainly with problems such as large measurement differences, poor mixing uniformity, poor adjustment of the ratio of fly ash, curing agent, stabilizer and water, etc. There are defects such as excess water overflow and dust overflow, which cause serious secondary pollution

As a result, the heavy metal stabilization effect and weather resistance of the treated fly ash are poor

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