锅炉送粉管道气固两相流的数值模拟  

The Numerical Simulation of Gas-solid Two-phase Flow in the Boiler Coal Pipe

作　　者：杨姣[1] 孙保民[1] 郭永红[1] 王晓天[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室

出　　处：《电站系统工程》2013年第6期24-26,共3页Power System Engineering

摘　　要：锅炉送粉管道内风粉气流流动是典型的气固两相流动,对锅炉运行的安全性和经济性有着重要影响。现以软件FLUENT为工具,采用湍流黏性离散相射流模型和SIMPLE算法,对研究对象建立模型,并对提高管道内风粉均匀性的方案进行数值模拟研究。通过计算不同开度的缩孔及5台磨在不同负荷下对应的压损,绘制出不同负荷下压损随缩孔开度的变化曲线,并提出用固定缩孔代替可调缩孔的思想。The air-coal flow in the boiler coal pipe is a typical gas-solid two-phase flow, which has important influence on the safety and economy of boiler operation. A discrete phase jet, viscous turbulence model and SIMPLE algorithm with the numerical simulation software FLUENT is used in the program of improving the air powder uniformity in the pipe. By calculating the different opening of shrinkage cavity and five mills under different load corresponding to the loss of pressure, paint a pressure loss curve changing with the shrinkage cavity opening under different load, and put forward the idea of using fixed shrinkage cavity instead of adjustable shrinkage cavity.

关 键 词：送粉管道 气固两相流 数值模拟 风粉配平 

分 类 号：TK223.25[动力工程及工程热物理—动力机械及工程]