垃圾焚烧过程中重金属分布特性的研究

STUDY ON DISTRIBUTION CHARACTERISTICS OF HEAVY METALS FROM MUNICIPAL SOLID WASTE INCINERATION

本文对垃圾焚烧过程中,不同粒径的灰颗粒中Hg、Pb、Cd、Cu、Zn、Ni六种重金属元素含量进行了测定,同时比较了燃烧飞灰、煤与垃圾混烧的飞灰以及垃圾飞灰三种灰样中相应的重金属含量。结果表明:焚烧飞灰中重金属浓度含量随着颗粒尺寸的增大而减少;三种不同灰样的重金属含量大小依次为:垃圾飞灰>煤与垃圾混烧飞灰>燃煤飞灰。

Distribution of heavy metal and its concentration in different size ash particles during MSW incineration were analyzed. Heavy metal concentrations on ash from combustion of coal, msw and co-firing of msw and coal were compared. It was proved that concentrations of heavy metals decrease with the particle size increasing and among the three kinds of ash, the concentrations are ranked decreasingly as: ash from combustion of msw, ash from co-firing of msw and coal, ash from combustion of coal.