Reuse treating method of flying ash of incinerators

Abstract

The invention discloses a reuse treating method of flying ash of incinerators, which at least comprises the steps of primary stable resin encapsulating processing, granulation processing, secondary resin packaging processing of mixing material, molding processing and the like for stored flying ash in a factory, and then, a non-dangerous engineering aggregate finished product is completed. In the whole treatment process of the reuse of the flying ash, water-base resin with low price is firstly used for curing and encapsulating the flying ash, therefore, the treatment method reduces the use quantity of oleoresin with high price and obviously reduces the treatment cost of the reuse of the flying ash. The reused finished product has double layers of resin encapsulating and packaging flying ash and exerts better stable property of low water permeability and low heavy metal dissolution.

Description

technical field [0001] The invention relates to an incinerator fly ash reuse treatment method which can significantly reduce the cost of fly ash reuse treatment, and the reused finished product can exert better performance in low water permeability and low heavy metal dissolution performance. Background technique [0002] At present, the sources of fly ash in waste incinerators are boiler soot blowing, first-stage dust collectors (such as cyclone dust collectors), semi-dry smoke scrubbers and second-stage dust collectors (such as bag filter dust collectors) ) are collected and divided into two categories: "paper combustion fly ash" and "dust collection reaction fly ash". The output ratio is 1:10, and most of them are mixed and stored. Fly ash is characterized by powder, high hydrophilicity, and large surface area. Its pollutants are mainly organic compounds such as heavy metals (thousands of mg / kg) and dioxin (more than zero to several ng-TEQ / kg) condensed on the surface. ,...

AI Technical Summary

Problems solved by technology

The harmless reuse of fly ash is mainly based on the cost of disposal and the degree of harmlessness to select the appropriate method for disposal; the existing method of cement mixing at room temperature, although compared with the high-temperature melting method of adding flux, can save energy However, there is a high risk of heavy metal leaching; and another existing method of room temperature resin packaging, even though the risk of heavy metal leaching is low, although a large amount of oily resin is used for curing during the treatment process. Or the practice of recycling products, but there are concerns that the processing cost is higher than the cement mixing method, and because the recycled products are often added with some qualitative materials (such as sand and gravel) to meet the rigid conditions of engineering purposes, there will be a risk of heavy metal dissolution Therefore, how to pack fly ash with lower-cost resin and stably form recycled products with low water permeability, low heavy metal leaching and high compressive strength, it is indeed necessary to improve the method and technology make another breakthrough

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