Process and apparatus for treatment of incinerator bottom ash and fly ash

摘要

A method for treatment of ash from incineration plants includes: collecting ash from an incinerator; feeding the collected ash and additional feed material to a gasification/vitrification reactor; vitrifying the ash and additional feed material in the gasification/vitrification reactor, to form a slag of molten material; allowing the slag to flow from the gasification/vitrification reactor and solidify outside the gasification/vitrification reactor; gasifying volatile components in the ash and the additional feed material; and using syngas generated in the gasification/vitrification reactor to augment the thermal environments of the incinerator.

主权项

1. A method for treatment of ash from incineration plants, the method comprising:
collecting ash from an incinerator; feeding the collected ash through a charge door or feed chute into a lower part of a gasification/vitrification reactor above a carbonaceous bed in the gasification/vitrification reactor; heating the carbonaceous bed to form a slag of molten material, and to gasify volatile components in the ash to generate syngas that rises to a secondary combustion zone in an upper part of the gasification/vitrification reactor; allowing the slag to flow from the gasification/vitrification reactor and solidify outside the gasification/vitrification reactor; supplying air, oxygen, or both, to the secondary combustion zone; and supplying the syngas directly from the secondary combustion zone in the gasification/vitrification reactor to the incinerator to augment the thermal environments of the incinerator.