西安市主要农作物秸秆资源量估算及能源化潜力分析

摘要

[Objective]To correctly evaluate the amount and distribution characteristics of main crop straw resources in Xi'an,and to fully understand the development potential of straw resources in Xi'an.[Method] Based on the method of straw to valley ratio,the crop resources of main crops in Xi'an were estimated comprehensively and systematically,and the amount of straw resources in each county was analyzed.[Result] In 2015,theoretical resources of main crop stalks was 2119.3 thousand tons,the amount of resources to be collected was 1759.5 thousand tons,the amount of potential utilization was 1495.5 thousand tons,amount of energy to be converted was 823.5 thousand tons.Wheat straw accounted for 55.4％ of the total,com straw accounted for 43.6％ of the total,cotton,rape accounted for 1％ of the total.The distribution of straw in Lintong,Changan and Huxian was relatively large,accounting for 18.0％,19.0％ and 17.0％,respectively.Annual average straw fossil energy replacement capacity of 888.3 thousand tons,all translated into economic value,equivalent to saving 549 million yuan of coal consumption in Xi'an.[Conclusion] The study can provide reference for the comprehensive utilization of straw resources in Xi'an.%[目的]正确评价西安市主要农作物秸秆资源量及其分布特性,充分认识西安市秸秆资源的开发潜力.[方法]以草谷比法为基础方法,对西安市主要农作物秸秆资源进行全面系统的估算,并分析各区县秸秆资源量分布.[结果]2015年西安市主要农作物秸秆理论资源量211.93万t,可收集资源量为175.95万t,可能源化利用量为149.55万t,可转化能源量82.35万t标准煤;小麦秸秆量占总量的55.4％,玉米秸秆占总量的43.6％,棉花、油菜占总量的1.0％.临潼、长安、户县的秸秆资源量分布较大,分别占比为18.0％、19.0％、17.0％.西安市年平均秸秆的化石能源替代量88.83万t,全部转化为经济价值相当于节约5.49亿元的煤炭消耗.[结论]该研究可为西安市秸秆资源的综合利用提供借鉴.