摘要
在一个自制的能实时检测质量的流化床干燥试验装置上对一种速生林木材的热风干燥特性进行了深入系统的研究,分析了热风温度、热风速度以及料层高度等对生物质样品干燥热特性的影响。结果表明:干燥速率随温度和风速的增加而增大;随料层厚度的增加而下降;物料的含水率越高,干燥速率越快,随含水率的变化,各条件对干燥速率的影响程度发生改变。通过对干燥过程模拟分析发现,干燥曲线以及脱水速率分别符合薄层Page模型和线性方程模型,且干燥方程中的参数k主要受风温和料层厚度影响,参数n则主要受风速影响。
The hot-air drying characteristics of a fast-growing timber were studied in-depth in a self-made fluidized bed drying device with real-time detection of quality, and the effect of hot-air temperature, velocity and material thickness on the drying characteristics was analyzed. The results showed that the drying velocity increased as hot-air temperature and velocity increased. As material thickness increasing, the drying velocity decreased. And the moisture content of the materials was the higher, the drying velocity was the faster, the influence degree of various conditions on the drying velocity changed with the moisture content. Meanwhile, the drying process was simulated further. It was found that the drying and velocity curves under different conditions all accorded with the thin layer Page model and linear equation model, respectively, and the parameter k was mainly affected by air temperature and material thickness, while the parameter n was mainly affected by air velocity.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2011年第6期782-786,共5页
Acta Energiae Solaris Sinica
基金
国家重点基础研究发展(973)计划(2007CB210202)
国家自然科学基金(50806027
50721005)
关键词
流化床热风干燥
含水率
干燥速率
模型
fluidized bed hot-air drying
moisture content
drying velocity
model
