适合高碱煤的液态排渣卧式旋风燃烧器冷态实验研究  

Experimental Study at Cold State on Horizontal Cyclone Slag-Tapping Equipment for High-Alkali Coal

作　　者：丘加友[1] QIU Jiayou(Shanghai Boiler Works Co.,Ltd.,Shanghai 200245,Chin)

机构地区：[1]上海锅炉厂有限公司,上海200245

出　　处：《锅炉技术》2018年第4期1-5,共5页Boiler Technology

基　　金：国家重点专项课题资助项目(2018YFB0604104);上海市科委重点项目(15dz1206500)

摘　　要：卧式旋风燃烧液态排渣锅炉技术是使大部分灰在旋风燃烧器内形成液态渣膜并从锅炉底部排出的一种锅炉技术,在解决准东高碱煤强沾污结渣问题方面具有一定的优势。采用冷态实验与数值模拟计算相结合的研究方法,分析了旋风燃烧器内的流场结构特性,并对旋风燃烧器结构参数及运行工况进行了优化。研究结果表明:旋风燃烧器中心处速度较小,在距中心线1/3半径处速度达到最大,旋风燃烧器缩口处存在明显的回流现象;二次风喷口离旋风燃烧器出口较远时有利于流场的稳定,缩口尺寸增大时回流区域变大且旋风燃烧器内风速趋于均匀。The horizontal cyclone combustion technology discharges most ash of the coal in molten state from the furnace bottom and shows significant reference for Zhundong highalkali coal with strong fouling and slagging characteristics.In this paper,analysis was carried out on the flow field in the horizontal cyclone burner by cold test and numerical simulation,and the burner structural parameters and operating conditions are optimized.Results show that velocity at the center is smaller and reaches the maximum at the 1/3 radius.There is obvious reflux phenomenon at the throat of cyclone.Distance from the secondary air nozzle to the cyclone burner outlet benefits the stability of the flow field. When the throat size increases,the backflow zone increases and the flow field in cyclone burner becomes more uniform.

关 键 词：高碱煤 液态排渣 卧式旋风燃烧器 数值模拟 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]