陈腐垃圾成分特性及其与原生垃圾掺烧研究

Study on the Composition Characteristics of Aged Refuse and Co-incineration with Municipal Solid Waste

随着垃圾填埋场库容告罄,城市土地资源匮乏使得陈腐垃圾的治理迫在眉睫。为探索陈腐垃圾无害化处理的问题,在填埋厂开挖不同填埋期的陈腐垃圾,对其进行物理组成和热值分析,并将其可燃组分在广东省某垃圾焚烧厂掺烧,分析掺烧后气体污染物排放规律。结果表明:陈腐垃圾中橡塑类较多(>50%),其中填埋期较长的陈腐垃圾陶瓷砖瓦类组分较高,不同填埋期的陈腐垃圾热值均可达到4000 kJ/kg以上。分选后将陈腐垃圾的可燃组分与原生垃圾掺混焚烧,烟气污染物亦满足我国垃圾焚烧排放标准(GB 18485-014)。此外,长期的陈腐垃圾掺烧不会导致垃圾焚烧厂出现亏损,因此陈腐垃圾掺烧不失为一种环保、经济的处理方案,这将为大规模陈腐垃圾资源化工业化利用提供指导。

As the storage capacity of the landfill was exhausted, the shortage of urban land resources made the treatment of aged refuse urgent. In order to explore the harmless treatment of aged refuse, aged refuse was excavated with different landfill periods at landfill. Then, its combustible components were co-combusted in waste incineration plant in Guangdong Province and the law of gaseous pollutants emission during co-combustion was analyzed. The results showed that there were plenty of rubber and plastics in aged refuse(>50 %), and aged refuse with a longer landfill age had a higher content of ceramic and tiles. The calorific value of aged refuse of different landfill ages could reach 4000 kJ/kg. After sorting, the combustible components of aged refuse were mixed with the municipal solid waste for co-incineration. The pollutants of flue gas also meet the standard for pollution control on the municipal solid waste incineration(GB18485-014). Furthermore, the long-term co-incineration would not cause losses to the waste incineration plant. Therefore, the co-incineration was an environmentally friendly and economical treatment plan, which would provide guidance for the large-scale industrial utilization of aged refuse as a resource.