能源煤化工基地生态效率分析

Eco-Efficiency Analysis for the Ningdong Energy(Coal) Chemical Base in Ningxia, China

提高生态效率是大型能源煤化工基地进行生态转型的关键。在物质流分析框架基础上,构建生态效率分析指标体系,运用模糊综合判定法,对宁东能源煤化工基地生态效率水平进行了测算。结果表明:(1)"煤电化"生产模式对提升资源经济产出效果明显,但是高能耗、高污染产业聚集也造成生态效率整体水平"很低";(2)环境治理水平不高与资源利用水平低是造成生态效率低下的主要原因;(3)从资源输入角度,能源及水资源产出率均处于"高"水平,但是原材料产出率水平"很低";(4)从环境胁迫角度,主要污染物的环境效率除氨氮外,均为"很低"水平。以此为基础,从推广清洁生产、产业链延伸以及加大矿区生态保护等方面提出具体保护措施。

Eco-efficiency is the key to eco-transition of large scale energy （coal） chemical bases. Based on the methodology of MFA, the resource metabolism characters of Ningdong energy （coal） chemical base is analyzed. On this basis, an analysis indicator system is built, which involves two aspects： resource efficiency and environment efficiency. The fuzzy comprehensive evaluation method is adopted to evaluate the base eco-efficiency level, which is described by five grades, namely excellent, good, moderate, bad and very bad. The results show that the evaluation grade of resource metabolism of Ningdong energy （coal） chemical base is very bad and the level of environmental improvement and resource utilization were the major cause of inefficiency. From the point of resource consumption, the grades of the eco- efficiency of energy input and water input were ＂excellent＂, but the eco-efficiency of material input was bad. From the point of environment pollution, the grades of the major pollutants emission intensity were ＂very bad＂ except ammonia nitrogen, having a certain disparity in contrast to the national average level. And there are great potential in the promotion of working section recovery, raw coal selective ratio and associated mineral resources comprehensive utilization, and the improvement of atmospheric pollutants prevention.