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为研究稻壳热解过程的热化学转化的能和(火用)关系,设计并建立了下吸式固定床稻壳热解反应系统,介绍了实验系统的设计方案以及热解反应系统的工作原理.通过实验测得稻壳热解反应中各产物的产量,利用能和(火用)的分析方法对稻壳热解产物进行了分析,得到不同热解温度下各热解产物的能和(火用)关系.结果表明:各成分热解气在500-700℃能值和炯值的贡献为CH4＞CO＞H2＞ CO2.在700～800℃过程中各成分能值和(火用)值的贡献为CO＞CH4＞H2＞CO2;为研发经济高效的热解反应器提供参考.“,”In order to study rice husk pyrolysis process thermochemical conversion of energy and exergy relations.In this paper,a downdraft fixed bed rice husk pyrolysis system was designed and established.The design scheme of the experimental system and the working principle of pyrolysis reaction system was introduced.The yield of each rice husk pyrolysis reaction product was measured by experiment.The energy and exergy of rice husk pyrolysis products were analyzed.The relationships of energy and exergy for pyrolysis products at different pyrolysis temperatures were obtained.The results indicate energy value and exergy value contributions of the components in the pyrolysis gas from 500℃ to 700℃ are CH4 ＞ CO ＞ H2 ＞ CO2.At 700℃ and 800℃ the rank turns into CO ＞ CH4 ＞ H2 ＞ CO2;The work will provide reference for the development of economical and efficient pyrolysis reactor.