在"双碳"政策背景下,燃煤掺烧污泥发电作为一种污泥资源化利用方式,不仅要考虑其对发电设备及发电成本的影响,更要重视其环境影响.对此,采用生命周期评价方法,对掺烧污泥发电的环境影响进行了综合评价分析.结果表明,燃煤掺烧污泥发电1000 kW·h的碳排放达到了950 kg CO2 eq,相当于约53棵树一年的固碳量.此外对结果进行了标准化、敏感性和不确定分析,以确定掺烧污泥发电的优劣性.结果表明,全球变暖(GWP)环境影响占比最高,达到63％,其次是高营养化(EP)和酸化(AP),敏感性分析发现GWP对生产阶段的敏感性较高,其他环境影响受燃煤、运输、电力的敏感性较高,污泥成分的不确定导致EP、AP结果的不确定性较大.
Environmental impact analysis of coal-fired co firing of sludge for power generation
In the context of the dual carbon policy,coal-fired co firing of sludge for power generation,as a way of sludge resource utilization,not only consider its impact on power generation equipment and cost,but also needs to pay attention to its environmental impact.In this study,a life cycle assessment method was used to comprehensively evaluate and analyze the environmental impact of co firing sludge for power generation.The results showed that the carbon emissions of 1000 kW·h of coal-fired mixed sludge power generation reach 950 kg CO2 eq,which is equivalent to the carbon sequestration of about 53 trees per year.In addition,standardization,sensitivity,and uncertainty analysis were conducted on the results to determine the superiority and inferiority of co-fired sludge power generation.The results showed that GWP has the highest proportion of environmental impact,reaching 63％,followed by EP and AP.Sensitivity analysis showed that GWP is more sensitive to the production stage,while other environmental impacts are more sensitive to coal,transportation,and electricity.The uncertainty of sludge composition leads to greater uncertainty in EP and AP results.
sludge co firingLife cycle assessmentcharacteristic analysissensitivity analysis
万方数据
维普
