中国农作物秸秆能源化潜力估算

农作物秸秆中含有丰富的有机质,是个巨大的能源库,对其的准确定量是秸秆综合利用的前提条件.文章以2005年中国农作物秸秆资源为例,结合农作物秸秆的能源转化方式,定量估算了中国农作物秸秆能源化的潜力,为秸秆综合利用提供参考资料.结果表明,中国每年约有3.995×108 t农作物秸秆可作为能源利用,这些秸秆若全部以直接燃烧、锅炉燃烧、压缩成型燃烧、沼气供热、沼气发电、气化供热以及气化发电等不同转化方式加以利用,则其能源化产品可分别替代化石燃料0.291×108,0.5×108,2.039×108,0.815×108,0.258×108,2.217×108和0.5987×108 t标煤.其中气化供热能源转化效率最高,可达60.37%,其次为压缩成型燃烧,能源转化效率达58.26%.秸秆资源用于气化供热和压缩成型燃烧潜力巨大.

Energy potentiality of crop straw resources in China

The crops straw is the latent and huge energy reservation because it contains abundant organic matter,measuring its quantity accurately is the precondition of crops straw comprehensive utilization.With the crops straw in 2005 as the example,the quantity of crops straw resource and its energy potentiality in 2005 in China was analyzed,which can provide the reference for crops straw comprehensive utilization.The results showed that approximate 399.5 million tons of crops straw are available to be used as energy every year.If all of these straw are used in different transformed way such as direct burning,boiler burning,pellet and briquette burning,methane heating,methane electricity generation,gasification heating,gasification for power and so on,the energy products may replace the fossil fuel of 29.1,50,203.9,81.5,25.8,221.7 and 59.8 million tons re- spectively.And among them,the highest efficiency is derived from gasification heating application, which energy transformation efficiency is 60.37%,and the next is pellet and briquette burning, which energy transformation efficiency is 50.28%.The crops straw resource has a huge potentiality with the applications of gasification heating and pellet and briquette burning.