摘要
基于2017—2021年苏州市某生活垃圾焚烧厂的进厂垃圾调查采样资料,对垃圾物理组成、含水率等指标进行了分析,并探讨了理化特性变化对焚烧过程碳排放的影响。结果表明:进厂垃圾以厨余类、橡塑类、纸类为主。垃圾分类政策实施后,厨余类含量均值(39.2%)相较分类前(54.8%)显著下降,橡塑类含量(37.4%)相对提高11.6个百分点。垃圾含水率随组分变化逐年下降,而低位发热量则相反。采用清洁发展机制方法学结合改进的上游-操作-下游表格法进行碳排放核算分析,发现由于橡塑类含量提高及含水率下降等因素,垃圾焚烧过程产生的直接排放量逐年提高,而碳减排潜力有所下降。建议苏州市今后在做好垃圾分类管理的基础上,对垃圾中较高利用价值的橡塑类进行有效分选和利用,同时采取一定的技术手段控制垃圾焚烧过程中产生的碳排放,以进一步提升垃圾焚烧发电项目碳减排潜力。
Based on the investigation and sampling data of the incoming waste of a domestic waste incineration plant in Suzhou from 2017 to 2021,various indicators such as the physical composition and moisture content of the waste were analyzed.And the impact of changes in physical and chemical characteristics on the carbon emissions of the incineration process was discussed.The results showed that the incoming waste in Suzhou was mainly composed of kitchen waste,rubber and plastic,and paper.After the implementation of the waste classification policy,the average content of kitchen waste(39.2%)decreased significantly compared with that before classification(54.8%).While the content of rubber and plastic(37.4%)increased by 11.6 percents.The moisture content of waste have decreased year by year with the change of components,while the low calorific value was the opposite.Carbon emission accounting analysis was carried out using the clean development mechanism methodology combined with the improved upstream operation downstream table method.With the increase in rubber and plastic content and the decline in moisture content and other factors,the direct emissions generated by the waste incineration process increased year by year,while the carbon emission reduction potential declined.It was suggested that Suzhou should effectively sort and utilize rubber and plastic products with high utilization value in waste in the future on the basis of waste classification management.At the same time,some technical measures should be taken to control the carbon emissions generated in the process of waste incineration,so as to further enhance the carbon emission reduction potential of waste to energy projects.
作者
孙雨清
钱寅飞
储思琴
SUN Yuqing;QIAN Yinfei;CHU Siqin(Suzhou Environmental Sanitation Administration Agency,Suzhou Jiangsu 215007;Shanghai Environmental Sanitation Engineering Design Institute Co.Ltd.,Shanghai 200232)
出处
《环境卫生工程》
2023年第1期104-111,118,共9页
Environmental Sanitation Engineering
关键词
垃圾分类
进厂垃圾
理化特性
焚烧
碳排放
garbage classification
incoming waste
physical and chemical properties
incineration
carbon emission
