600MW四角切圆燃烧锅炉炉内过程的数值模拟  

Numerical Simulation of Flow and Combustion Process in a 600 MW Tangentially Fired Boiler

作　　者：赵立业[1] 辛国华[1] 

机构地区：[1]东北电力大学能源与机械工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2008年第6期48-52,共5页Journal of Northeast Electric Power University

摘　　要：采用计算流体力学软件Fluent,选择合理的数学模型,对600 MW切圆燃烧锅炉炉内的流动、传热及燃烧进行了数值模拟。在炉内数值模拟过程中,气相湍流流动采用可实现的k-ε双方程模型,对控制方程的求解采用SIMPLEC算法。计算结果表明:炉内最高温度出现在燃烧器区域;整个炉膛空间存在旋转流场,炉膛出口仍有残余旋转存在;烟温偏差成因于炉膛出口的残余旋转;二次风反切在一定程度上能有效地削弱炉膛出口的残余旋转,从而降低水平烟道的烟温偏差。The computational Fluid Dynamics （CFD） Fluent software and reasonable mathematical model are employed to investigate numerically the flow field, heat transfer and combustion process in a 600MW tangentially fired boiler. In the numerical simulation process, Realizable k-ε two equations turbulent model are employed to simulate the turbulence, and the equations are solved by SIMPLEC algorithm. The results show that the highest temperature appears in the area of the burners ; the rotation exists in the whole furnace, but residual rotation still exists at the exit of furnace; the flue gas imbalance results from the residual rotation, and the reverse rotation of the secondary air can effectively weaken residual rotation at furnace and then decrease flue gas imbalance in horizontal gas-pass to a certain extent.

关 键 词：切圆燃烧锅炉 数值模拟 残余旋转 温度偏差 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]