基于主成分分析的垃圾焚烧炉运行和污染物排放分析

Principal component analysis on operation parameters and pollutant emission of municipal solid waste incinerator

在杭州某150 t/d的循环流化床垃圾焚烧炉上试验研究了焚烧炉运行参数与污染物排放之间的关系.采用主成分分析(PCA)方法研究了各运行参数对燃烧过程中污染物排放的贡献,实现了高维复杂数据的降维,并分析了多环芳烃和典型无机污染物之间的关联性.结果表明,用2个主成分就可以描述原有变量80%以上的信息,主成分1保留了与温度相关的大部分变量以及给水压力和汽包压力的信息,主成分2主要提供了给水温度、总风量和主蒸汽压力的信息.多环芳烃各同系物在尾部烟道的生成途径是相同的,CO和多环芳烃之间存在强烈的关联,而SO2和NOx与多环芳烃的关联不大.

Field experiments were conducted in a 150 t/d circulating fluidized bed municipal solid waste （MSW） incinerator in Hangzhou to study the correlation between operation parameters and pollutant emissions during MSW incineration. Principal component analysis （PCA） was employed to investigate the contribution of operation parameters to pollutant emissions and so the complexity of data was dramatically reduced. And the relationships between polycyclic aromatic hydrocarbons （PAHs） and typical inorganic pollutants were analyzed. The results revealed that two principal components could reflect more than 80% of the original information. Principal component 1 mainly reserved the information related to temperature, water pressure and water separator pressure, while principal component 2 provided the information related to feedwater temperature, total air volume and main steam pressure. The formation mechanisms of PAHs in the post combustion zone were identical. Carbon monoxide was highly related with PAHs, while nitrogen oxide and sulfur dioxide did not have positive relationshin with PAHs.