化学工程2011，Vol.39Issue(9)：93-97,102,6.
分布板对液固流化床换热器颗粒分布的影响
Effect of distributor on particles distribution of liquid-solid fluidized bed heat exchanger
摘要
Abstract
Based on the three-dimensional Navier-Stokes equations for control and k-e two-equation turbulence models, with particles(1 mm in diameter) as solid phase and water as flow phase, the two-phase flow in liquid-solid fluidized bed heat exchanger was numerically simulated by implicit finite volume method. The effects of distributor's existence and structure on particles distribution were studied. The simulation results were verified by pressure distribution experiment of the lower channel. It shows that the existence of distributor improves the uniformity of the particles distribution in the heat exchange tube bundle, and the improving effect of curved distributor is better than that of the plane one. When the installation height ratio is 0. 250-0. 500, the particles distribution in tube bundle is better. A better distribution is achieved with the increase of initial solids volume fraction and liquid inlet velocity. The results error of pressure experiment and simulation is within 20% , which verifies the accuracy of mathematical model selected.关键词
液固流化床换热器/分布板/颗粒分布/不均匀度/数值模拟Key words
liquid-solid fluidized bed heat exchanger/ distributor/ particle distribution/ unevenness/ numerical simulation分类
化学化工引用本文复制引用
林广周,王德武,张继军,刘燕,张少峰..分布板对液固流化床换热器颗粒分布的影响[J].化学工程,2011,39(9):93-97,102,6.基金项目
河北省自然科学基金资助项目(2008000008) （2008000008）
