填埋场陈腐垃圾筛上物热值及掺烧对焚烧炉运行工况影响研究——以云南省某市陈腐垃圾掺烧为例
Influence of the Calorific Value of Screened Stale from Aged Waste in Landfill and Blending Combustion on the Operation Condition of Incinerator:A Case Study of Mixed Burning of Aged Waste in a City of Yunnan Province
王湘徽 1朱悦 2陈润生1
作者信息
- 1. 上海康恒环境修复有限公司,上海 201703
- 2. 同济大学,上海 200092;上海市环境科学研究院,上海 200233
- 折叠
摘要
依托新建成的生活垃圾焚烧厂开展了较长时间的陈腐垃圾筛分和掺烧可行性试验.通过对生活垃圾填埋场中的陈腐垃圾开挖、"滚筒筛+风选"预处理,对获得的筛上物进行组分特性分析,发现筛上物(干基)中塑料等轻物质类占比约 53%,且与筛上物含水率呈负线性关系.将筛上物运至焚烧厂按一定设计比例与原生垃圾掺烧,根据各组分入炉垃圾量、吨蒸发量等数据,利用能量守恒定律计算得出筛上物的热值约 6 258 kJ/kg.掺烧会导致烟气处理系统中消石灰日均单耗量显著增加,但不影响尿素的日均单耗量,也会显著增加炉渣和飞灰的日均产生量.基于自动化程度较高的烟气处理系统,掺烧不会显著增高烟气污染物小时平均浓度,也未显著增加尾气排放的不稳定性,所有浓度最高值均满足相关排放标准的要求.
Abstract
Relied on the newly built domestic waste incineration plant,a long-term feasibility test for screening stale waste in landfill and co-incineration with municipal solid waste was carried out.Through the composition characteristics analysis of the screened materials obtained by the excavation of stale waste in domestic waste landfills and the pre-processing with"drum screening + air sorting",it was found that the proportion of light substances such as plastics in the screened materials(dry basis)accounted for about 53%,and had a negative linear relationship with the moisture content of the screened materials.The screened material was transported to the incineration plant and mixed with raw waste at certain designed ratios.Based on data such as the amount of waste entering the furnace,tonnage of evaporation,etc,the calorific value of the screened material was about 6 258 kJ/kg by using the law of conservation of energy.Blended combustion could lead to a significant increase in the average daily unit consumption of slaked lime in the waste gas treatment system,but could not affect the average daily unit consumption of urea,and it could also significantly increase the average daily production of slag and fly ash.Based on the highly automated waste gas treatment system,blended combustion would neither significantly increase the hourly average concentration of flue gas pollutants,nor significantly increase the instability of tail gas emissions.And all maximum concentrations of pollutants met the relevant emission standards requirements.
关键词
陈腐垃圾/筛上物/掺烧/热值/尾气污染物浓度Key words
aged refuse/screened materials/blended combustion/calorific value/pollutant concentrations in waste gas引用本文复制引用
出版年
2024
NETL
NSTL
万方数据