Online treatment system and process for synergy of garbage fly ash and garbage leachate

Abstract

The invention discloses an online treatment system and process for synergy of garbage fly ash and garbage leachate. The online treatment system comprises a fly ash conveying system, a plasma melting furnace system, a slag discharging and collecting system, a garbage leachate conveying system, a secondary combustion chamber and combustion system, a waste heat boiler system, a quench tower and a garbage incineration plant flue gas purification system. According to the online treatment system, the plasma melting furnace is used for completing melting vitreous transition of the garbage fly ash and decomposition of dioxin in the garbage fly ash, regeneration of the dioxin is avoided through quenching cooling of the quenching tower, even if a small amount of the dioxin is regenerated, the dioxin can be continuously removed in recycling of fly ash, and harmless treatment of the garbage fly ash is completely guaranteed. The garbage fly ash can be treated, meanwhile, the garbage leachate can be co-treated, the garbage leachate is conveyed into the secondary combustion chamber to be combusted, and the problem of garbage incineration power plant leachate is thoroughly solved; the dioxin and heavy metal generated by combustion of the garbage leachate can also be thoroughly solved through recycling of the garbage fly ash.

Description

technical field [0001] The invention relates to the disposal and comprehensive utilization of hazardous waste in the field of environmental protection, and in particular to an on-line disposal system of garbage fly ash and landfill leachate and its technology. Background technique [0002] Fly ash from waste-to-energy plants is a highly toxic pollutant due to its high concentration of dioxins and heavy metals. Waste incineration fly ash has been included in the national list of hazardous waste and requires special treatment before it can be discharged. Currently, waste Fly ash from incineration power plants is mainly disposed of in the form of landfill after reacting with chelating agents. However, as environmental protection measures become more stringent and landfill land approval becomes more and more difficult, ordinary waste fly ash disposal technology can no longer meet the requirements; The leachate problem of waste incineration plants is also one of the more difficul...

AI Technical Summary

Problems solved by technology

[0002] Fly ash from waste-to-energy plants is a highly toxic pollutant due to its high concentration of dioxins and heavy metals. Waste incineration fly ash has been included in the national list of hazardous waste and requires special treatment before it can be discharged. Currently, waste Fly ash from incineration power plants is mainly disposed of in the form of landfill after reacting with chelating agents. However, as environmental protection measures become more stringent and landfill land approval becomes more and more difficult, ordinary waste fly ash disposal technology can no longer meet the requirements; The leachate problem of waste incineration plants is also one of the more difficult problems in waste incineration plants. General physical, chemical or biological methods are costly and difficult to deal with

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