煤稻秸粒在旋转导向管喷动床中的共喷性能

Co-spouting capabilities of mixture of coal with straw in rotating draft tube spouted bed

为得到在直径和高度方向上可放大的煤和生物质共喷动气化设备,设计了旋转导向管喷动床气化设备,在气化前必须揭示煤与生物质(如稻秸)在此设备中的共喷性能。得到了床层压降与表观风速关系曲线,同时研究了煤稻秸粒混合比例、喷口直径和导向管喷口间距3个因素对床层压降与表观风速关系曲线和物料循环速率与风速关系曲线的影响。进行了3因素12水平的均匀设计试验,经回归分析,均以稻秸煤混合比例、导向管喷口间距及喷口直径为自变量,得到了3个方程,分别是循环速率方程、单位床高压降方程及单位有效功率的物料循环速率方程。旋转导向管喷动床可用于煤和生物质稻秸的冷态共喷动,共喷动性能可预测,为后继气化试验提供了依据。

For finding a novel spouted bed scaled up for biomass gasificating with coal,a rotating draft tube spouted bed（RDTSB） was designed.Before gasificating,co-spouting capabilities of mixture of coal with biomass such as straw in the RDTSB needed to be investigated first.The curve of pressure drop of the bed with superficial air velocity is obtained,as well as the effects of parameters such as proportion of mixture,jet diameter,and draft tube jet distance（DTJD） on this curve and the curve of the circulating rate of the mixture with superficial air velocity.Three regression equations are gained by U12（123） uniform design experiments and multiple variable linear regression using SPSS,in which the dependent is circulating rate of the mixture,pressure drop of unit material height and circulating rate of the mixture of unit effective power respectively and the independents are all of proportion of mixture,spout diameter and DTJD.Three equations can be used to forecast co-spouting capabilities of the mixture in RDTSB.