摘要
旋风分离器是循环流化床(CFB)锅炉的核心部件,其分离效率影响锅炉燃烧特性和环保特性,其运行阻力影响风机选型和厂用电耗,分离器的提效减阻对CFB锅炉至关重要。通过对某300 t/h锅炉旋风分离器开展模拟,得出喉口流速、筒体直径、锥体长度、中心筒直径及插入深度等关键参数对分离器效率和阻力的影响规律。基于模拟结果,对3 MW循环流化床中试实验台的分离器进行了结构改造及实验验证,实验结果与模拟一致。结果表明,增加筒体直径、锥体长度、中心筒插深,均会提升分离效率,同时不会增加阻力;增加喉口流速能够提升分离器效率,但阻力增加明显。并将该结论运用于新一代锅炉设计中,使得锅炉的床料品质、燃烧特性、环保特性得到大幅改善。
The cyclone separator is the core component of the circulating fluidized bed(CFB)boiler.Its separation efficiency affects the combustion characteristics and environmental protection characteristics of the boiler,and its operating resistance affects the fan selection and plant power consumption.The efficiency improvement and resistance reduction of the separator are crucial to the CFB boiler.In this paper,a 300 t/h boiler cyclone separator is simulated,and the influence rules of key parameters such as throat flow rate,cylinder diameter,cone length,central cylinder diameter and insertion depth on separator efficiency and resistance are obtained.Based on the simulation results,the structural modification and experimental verification of the separator of the 3 MW CFB pilot test rig were carried out,and the experimental results were consistent with the simulation.The results show that increasing the diameter of the cylinder,the length of the cone,and the insertion depth of the central cylinder can increase the separation efficiency and reduce the resistance.Increasing the flow velocity at the throat can improve the efficiency of the separator,but the resistance increases significantly.And this conclusion is applied to the design of a new generation of boilers,which greatly improves the bed material quality,combustion characteristics and environmental protection characteristics of the boilers.
作者
王晓炜
韩诚良
WANG Xiaowei;HAN Chengliang(Taiyuan Boiler Group Co.,Ltd.,Taiyuan 030021,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期721-726,共6页
Clean Coal Technology
关键词
CFB锅炉
旋风分离器
效率
阻力
数值模拟
实验验证
工程应用
CFB boiler
cyclone separator
separation efficiency
resistance
CFD simulation
experimental verification
engineering application
作者简介
王晓炜(1984—),男,汉族,山西运城人,硕士。E-mail:17703512264@163.com
