不同抽气率下细粉分离器流场数值模拟  

Numerical Simulation on Pulverized Coal Classifier Under Different Absorbing Air Ratio

作　　者：潘维[1] 池作和[1] 李戈[1] 徐璋[1] 周昊[1] 蒋啸[1] 岑可法[1] 

机构地区：[1]浙江大学

出　　处：《电站系统工程》2003年第6期10-12,共3页Power System Engineering

基　　金：国家重点基础研究发展规划项目(G1999022204-03) ;全国优秀博士论文专项基金资助

摘　　要：细粉分离器是中间储仓式电站锅炉制粉系统中的重要设备。传统细粉分离器效率低下,造成排粉风机磨损、汽温波动等问题。有关试验表明,在分离器底部抽取一定量的气体是提高其分离效率的有效途径。采用RNG k-ε模型,对下抽气细粉分离器进行了数值模拟,研究其内部气流流动特性,并与传统细粉分离器比较,分析抽气对分离器流场和分离效率的影响,模拟结果与试验结果吻合良好。Pulverized coal classifier (PCC) is one of the most important equipments in power plant. The efficiency of traditional PCC is low and causes severe problems such as steam temperature fluctuating. Related experiments have proved absorbing air out from the bottom of PCC is a good way to improve the efficiency of PCC. RNG k-ε model is adopted for numerical simulation, the calculation results compared well with experiments.

关 键 词：锅炉 制粉系统 细粉分离器 流场 数值模拟 中间储仓式热风送粉系统 

分 类 号：TK223.25[动力工程及工程热物理—动力机械及工程]