Recycling treatment system and method for municipal solid waste incineration fly ash

Abstract

The invention discloses a recycling treatment system and method for municipal solid waste incineration fly ash. The recycling treatment system comprises a desorption device, a two-stage heat exchanger, a plasma reactor, a discharge hopper, a slag cooler, a washing tank, a solid-liquid separator and an evaporator; a gas phase outlet of the desorption device is connected with a heat source inlet ofthe two-stage heat exchanger through a fan, and a heat source outlet of the two-stage heat exchanger is connected with the plasma reactor; a cold source inlet of the two-stage heat exchanger is connected with cooling media; a solid phase outlet of the desorption device is connected with the discharge hopper, and a discharging port of the discharge hopper is connected with a slag inlet of the slagcooler; a slag outlet of the slag cooler is connected with the washing tank through heat exchange, and a discharging port of the washing tank is connected with the solid-liquid separator; and a liquidphase outlet of the solid-liquid separator is connected with the evaporator. According to the recycling treatment system and method for the municipal solid waste incineration fly ash, the degradationof dioxins and recycling of mercury and inorganic salt in the municipal solid waste incineration fly ash can be achieved, and the system has no secondary pollution, and can be directly applied to treatment of working procedures after waste incineration; the restriction on implementation depending on a cement kiln is overcome, and the application range of the recycling treatment system is wider; and the recycling and harmlessness of the municipal solid waste incineration fly ash are achieved.

Description

technical field [0001] The invention relates to the direction of non-polluting discharge and treatment of solid residues in incineration garbage in the field of environmental protection, and in particular to a resource disposal system and method for domestic garbage incineration fly ash. Background technique [0002] With the rapid development of China's economy, a large amount of energy and resources are consumed, and the resulting environmental pollution is a major problem that needs to be solved urgently in modern production and life. Nowadays, the treatment of domestic waste is roughly divided into landfill and incineration. During the landfill process, pollutants are easily transferred into the ground and pollute the soil. With the vigorous promotion of waste incineration technology in China in recent years, the intensity and contribution rate of waste incineration are also increasing, and waste incineration produces a large amount of fly ash solid particles, and the tr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a resource disposal system and method for domestic waste incineration fly ash, which solves the problems of cumbersome system combination, difficult recovery of beneficial industrial raw materials and small application range in the existing system, and can achieve resource recovery of by-products high level requirements

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