摘要
在固定床反应器模拟的再燃区内,采用棉秆、稻秆和污泥3种生物燃料及其焦进行还原NO的实验,考察生物燃料种类及再燃工况条件(再燃区O2浓度和温度)对NO还原率的影响,并对3种生物燃料还原NO过程中焦异相还原NO特性进行分析。结果表明:再燃条件下3种生物燃料均能有效对NO进行还原,实验条件下,棉秆、稻秆和污泥获得的最大NO还原率分别为86%、84%和56%,减小再燃区O2浓度、提高再燃区温度,生物燃料获得的NO还原率提高;生物燃料焦还原NO过程中,存在最佳再燃区O2浓度,使NO还原率达到最高;棉秆和稻秆还原NO过程中,焦对NO的异相还原反应起次要作用,而污泥还原NO过程中,焦对NO的异相还原反应起主要作用。
Experimental study on NO reduction process by three kinds of biofuels cotton straw, rice straw and bio- sludge as well as their chars were carried out in the reburning zone simulated by a fixed bed reactor. The influences of biofuel type and reburning parameters （ O2 concentration and temperature in the reburning zone） on NO reduction efficiency were investigated. The characters of heterogeneous NO reduction by biochars during the process of NO re- duction by biofuels were also analyzed. The results showed that the biofuels could reduce NO emissions efficiently under reburning conditions, maximum NO reduction efficiencies of 86% , 84% and 56% were achieved by cotton straw, rice straw and biosludge under the experimental conditions. Decreasing O2 conentration and increasing tem- perature in the reburning zone, NO reduction efficiencies of the biofuels increased. There were optimal O2 concen- tration in the reburning zone for NO reduction by biochars. Heterogeneous NO reduction by biochars played a minor role in NO redution by cotton straw and rice straw, while it played a major role in NO reduction by biosludge.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第3期388-394,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51076052
21176098)
中央高校基本科研业务(HUST:2012QN178)
关键词
生物燃料
再燃
NO还原率
biofuel
reburning
NO reduction efficiency
