Melting solidification integrated method and system for incineration of hazardous wastes and incinerated fly ash

Abstract

The invention discloses a melting solidification integrated method and a melting solidification integrated system for the incineration of hazardous wastes and incinerated fly ash. The method comprises the following steps of: incinerating and melting the hazardous wastes by using a multi-section incinerator which consists of a slag rotary kiln and a secondary combustion chamber; recovering the heat of smoke generated during incineration by using an afterheat boiler; conveying fly ash collected by a bag-type dust collector to the slag rotary kiln by using a silo pump and a fly ash return pipeline; performing compatibility on the fly ash and medical wastes, so that the fly ash is melted at a high temperature in the slag rotary kiln; and performing water quenching to form vitreous slag, and wrapping heavy metal by using the slag to realize the stable solidification of the metal. In the method, heat energy generated by combusting the hazardous wastes is utilized fully to provide energy for the melting solidification of the fly ash, the problem of high cost of stabilization treatment of the fly ash is solved while the innocent treatment of the hazardous wastes is realized, running cost is reduced, and the important effects of energy conservation, emission reduction and waste control by the wastes are achieved; and due to the adoption of an integrated design, the integrated system is reasonably and compactly connected and has a mature equipment structure and higher economy.

Description

technical field [0001] The invention relates to hazardous waste harmless treatment technology, and more specifically relates to an integrated method and system for hazardous waste incineration and incineration fly ash melting and solidification. Background technique [0002] Hazardous wastes refer to wastes that are included in the national list of hazardous wastes or that are identified as having hazardous characteristics according to the national hazardous waste identification standards and identification methods. Hazardous waste incineration disposal technology is an effective treatment method for hazardous waste reduction, harmlessness and resource utilization because it can effectively destroy toxic and hazardous waste in hazardous waste and at the same time effectively recover the released waste heat. Usually, hazardous waste incineration systems need to be equipped with corresponding tail gas treatment equipment to control secondary pollutants. In addition to acid gas...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an integrated method and system for hazardous waste incineration and incineration fly ash melting and solidification, which solves the problem of high cost of fly ash stabilization and disposal, reduces operating costs, saves energy and reduces emissions, and treats waste with waste important role

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