350 MW超临界CFB锅炉旋风分离器进口改造模拟研究
李宁¹，丁雪松¹，徐雨红¹，赵新建¹，王肖肖²，王毅斌²，杨祖旺³
（1. 华电国际电力股份有限公司朔州热电分公司，山西 朔州 036000；2. 西安交通大学能源与动力工程学院，陕西 西安 710049；
3. 西安格瑞电力科技有限公司，陕西 西安 710049）
摘要： 采用CFD 对一350 MW 超临界CFB 锅炉旋风分离器改造前后的进口结构进行了数值模拟，使用Realizable k-棕
湍流模型来封闭N-S 方程，研究了改造前后旋风分离器内速度场、静压场及颗粒质量浓度场的变化。模拟结果表明：
CFB 锅炉在TRL工况下运行时，改造后旋风分离器内部流场和静压场结构与改造前基本相同，但进口速度增大到27 m/s 左
右，达到了设计值；同时改造后旋风分离器中心区域颗粒质量浓度更低，减少了颗粒被重新卷吸的量，提高了旋风分离
器分离效率，为超临界CFB 锅炉低负荷运行提供了保证。
关键词： 旋风分离器；数值模拟；超临界CFB 锅炉
中图分类号： TK229.6⁺6     文献标识码： A     文章编号： 2095-0802-(2021)10-0124-04
Simulation on Inlet Modification of Cyclone of 350 MW Supercritical CFB Boiler
LI Ning1, DING Xuesong1, XU Yuhong1, ZHAO Xinjian1, WANG Xiaoxiao2, WANG Yibin2, YANG Zuwang3
(1. Shuozhou Thermal Power Branch Company, Huadian International Power Co., Ltd., Shuozhou 036000, Shanxi, China;
2. School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China; 3. Xi'an Green Power
Technology Co., Ltd., Xi'an 710049, Shaanxi, China)
Abstract: CFD was used to simulate the inlet structure of the cyclone of a 350 MW supercritical CFB boiler before and after the
modification. Realizable k-棕turbulence model was used to close the N-S equation. The influence of inlet structure of cyclone on
the field of velocity, static pressure and particle mass concentration was studied. The simulation results showed that when the CFB
boiler was operating under TRL conditions, the field of velocity and static pressure of the cyclone after the modification was
basically the same as before the modification, but the inlet velocity was increased to 27 m/s, which reached the design value; at
the same time, after the modification, the particle mass concentration in the center area of the cyclone became lower, which
reduced the amount of particles re-entrained and improved the separation efficiency of the cyclone separator, and provided a
guarantee for the CFB boiler to operate under low load.

Key words: cyclone; numerical simulation; supercritical CFB boiler