Waste incinerator fly ash heat treatment system

Abstract

The invention discloses a waste incinerator fly ash heat treatment system. A flue gas sintering and melting furnace is included, and communicates with a flue gas outlet pipeline of a grate furnace anda fuel gas pipeline; a melting chamber is arranged on the lower portion of the flue gas sintering and melting furnace, and the side wall of the melting chamber is provided with a flue gas inlet and asupplemented fuel gas inlet; a cyclone hearth is above the melting chamber which communicates with the cyclone hearth; the side wall of the cyclone hearth is provided with a secondary air inlet; thetop of the flue gas sintering and melting furnace is provided with a flue gas outlet which is connected with a flue gas discharging pipeline; a slag discharging port is formed in the bottom of the flue gas sintering and melting furnace; flue gas and supplemented fuel gas are combusted in the melting chamber, for particles in fly ash in the high temperature environment, being 1300 DEG C or above, of the sintering and melting furnace, the volume is reduced, and residues such as heavy metal are stabilized. The molten ash content becomes slag and can be recycled as a roadbed material, a building material and the like; and meanwhile, due to decomposing under high temperature, dioxin in the fly ash can be substantially lowered.

Description

technical field [0001] The invention belongs to the technical field of waste incineration flue gas treatment, and in particular relates to a heat treatment system for fly ash of a waste incinerator. Background technique [0002] With the rapid development of social economy, municipal solid waste has become a major social hazard, and the pollution it causes is one of the problems that need to be solved urgently in the environmental protection of countries all over the world. In recent years, the problem of domestic waste pollution in my country has become more and more serious, which has brought serious harm to the urban environment and sanitation conditions, and the amount of urban domestic waste is also increasing rapidly. If municipal solid waste is not properly collected, utilized and disposed of, it will pollute the air, water and soil, affect the appearance of the city, reduce the quality of people's living and living environment, and even endanger human health. [000...

AI Technical Summary

Problems solved by technology

The system needs to be equipped with a flame burner, the energy consumption is high and the residence time of the flue gas combustion is short, which is not conducive to the full sintering of the flue gas

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