垃圾衍生燃料热重法的燃烧特性

采用热重技术对由垃圾可燃物制备的垃圾衍生燃料(RDF)的燃烧特性进行了实验研究,并由微分热重曲线计算了它们燃烧反应的动力学参数．研究结果表明,草木类RDF存在二次着火现象,织物、塑料及混合原料RDF只存在固碳着火点．草木类RDF最易着火燃烧并且燃烧最猛烈但持续时间很短,塑料类RDF最耐烧,混合原料RDF的燃烧反应较平稳并且持续时间较长,易于实现稳定的燃烧．RDF的燃烧过程可由几个一级反应来描述．混合原料RDF中的各组成原料的燃烧相互影响,其燃烧特性不能由各组成原料燃烧特性简单叠加而成,各种原料RDF燃烧的难易程度可用表观活化能来表征。

Analysis of Combustion Characteristics of RDF by Thermogravimetry

Combustion characteristics of refuse derived fuel (RDF) prepared from combustible components (plastics, plants, fabric and their mixtures) were analyzed by means of thermogravimetry. The combustion activation energy and frequency factor were obtained by Doyle method. The results showed: RDF of plants had two ignition points; RDF of fabric, plastics and their mixtures had only one ignition point of fixed carbon; RDF of fabric was the most prone to ignition and have the most dramatic combustion and the least duration period; RDF of plastics had the longest duration period; RDF of their mixture have stable combustion and long duration period. Thus stable incineration can be guaranteed. Combustion reaction of RDF can be described by several first level reaction: the degree of difficulty of combustion reaction can by describe by the apparent activation energy;combustion characteristics of mixture RDF can not be describe by simple accumulation of combustion characteristics of every components of the mixture.