| 摘要: |
| 为定量评价秸秆热解多联产工程的环境影响，借鉴生命周期评价方法，将秸秆热解多联产系统工程建设单元的物质和能量投入及其环境排放纳入系统边界，对年秸秆处理能力1.0×104 t的秸秆热解多联产系统的环境影响进行分析评价。结果表明，不考虑产出品的替代减排，该系统生命周期的环境影响综合指数为175.53。其中，工程建设单元、运行单元和产物利用单元的环境影响潜值分别占18.10%、78.75%和3.15%。钢材和PVC管等物料的环境排放合计占建设单元环境排放综合潜值的93.49%，电力消耗排放占运行单元环境排放综合潜值的93.86%。从资源替代角度看，秸秆燃气替代煤炭、秸秆炭和木醋液分别减施化肥和农药情景下，该项目功能单位的环境影响综合指数为-496.86。秸秆热解多联产系统通过资源替代可有效减少环境排放，具有良好的环境减排效应。在未来秸秆热解多联产系统建设过程中，应选择低碳环保的建筑材料，降低运行电耗。 |
| 关键词: 秸秆 热解多联产 生命周期 环境影响 替代减排 |
| DOI：10.11841/j.issn.1007-4333.2019.10.16 |
| 分类号: |
| 基金项目:国家自然科学基金（41771569）；中央级公益性科研院所基本科研业务费专项（1610132017020；JBYW-AII-2019-20） |
|
| Environmental impact evaluation of straw pyrolytic poly-generation system |
|
WANG Hongyan1, WANG Yajing2, BI Yuyun2, MO Jixian2, GAO Chunyu2
|
|
1.Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
|
| Abstract: |
| In order to quantitatively evaluate the environmental impact of straw pyrolytic poly-generation project,life cycle assessment (LCA) is referenced to build an integrated LCA framework.The material and energy inputs of construction unit and their environmental emissions are included in the system boundary.The environment performance of straw pyrolytic poly-generation system with annual straw processing capacity of 1.0×104 tons is calculated in this study.The results show that the total global environmental impact load of processing 1.0×104 tons of crop straw by straw pyrolytic poly-generation system is 175.53 PE (person equivalent).The environmental impacts of construction unit,operation unit and product utilization unit account for 18.10%,78.75% and 3.15%,respectively.The environmental impact of steel and PVC pipe accounts for 93.49% of the construction unit.The environmental impact of electricity consumption accounts for 93.86% of the operation unit.From the perspective of resource substitution for coal,pesticide and fertilizer,the system environmental impact load is -496.86 PE.The straw pyrolytic poly-generation project decreases the environment emission and shows good environment impact.It is necessary to reduce electricity consumption and use low-carbon and environmentally-friendly building materials in straw pyrolytic poly-generation system in the future. |
| Key words: straw pyrolytic poly-generation life cycle environment impact emission reduction caused by resource substitution |
