摘要
针对熔融结晶洗涤塔的过滤操作模式,根据表面过滤原理分析了洗涤塔内过滤段的物理模型和数学模型,建立了过滤微分方程和相关边界条件;通过过滤方程的求解,建立了过滤段滤饼过滤的压力分布公式以及滤液体积流率与滤饼变化厚度的关系式,并对相关主要影响因素进行了分析。结果表明,洗涤塔过滤段滤液体积流率与压力降、比滤阻、过滤介质阻力、滤饼厚度等有关,这个结果在一定程度上揭示了洗涤塔的部分结构和操作原理。又对结晶在向上输送过程中的机械压榨行为和母液进一步脱除的工作原理进行了分析计算,并推导出了过滤和压榨联合作用下的滤液体积流率的计算公式。
As for the filtration operation mode of molten crystallization washing tower,according to the surface filtration principle,the physical and mathematical models of the filtration were analyzed for the tower,and the differential equation and relevant boundary conditions were also established.Based on the solution of the differential equation,the expressions of pressure distribution and relationship between filtrate flow rate and cake thickness were deduced.This thesis show that filtrate volume flow rate in the washing tower had relation with pressure-drop,specific drainage pressure,filter medium resistance,cake thickness.According to those expressions,some factors affecting the filtration performance were also analyzed.These results revealed some structure features and operation principle of the washing tower to a certain extent.Furthermore,the mechanical squeezing behavior against the crystal bed,during being delivered upward by the screw peeler,and its effect on filtration and further liquid-removal were analyzed,and the calculation formula of filtrate volume flow rate under the combined action of the filtration and the mechanical squeezing were also deduced.
出处
《过滤与分离》
CAS
2011年第3期9-11,28,共4页
Journal of Filtration & Separation
关键词
熔融结晶洗涤塔
表面过滤
压榨
物理和数学模型
molten crystallization washing tower
filtration
squeezing
physical and mathematical model
