燃煤锅炉中煤粉流量的超声波在线检测  

On-line Ultrasonic Measurement of Pulverized Coal Flux in Coal-powder Boilers

作　　者：侯怀书 陈朝雷 朱兵兵 严祯荣[2] 

机构地区：[1]上海应用技术大学机械工程学院,上海201418 [2]上海锅炉厂有限公司,上海200245

出　　处：《理化检验（物理分册）》2017年第2期110-113,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：上海市质量技术监督局科研计划资助项目(2013-51)

摘　　要：以ECAH理论模型为基础,分析了煤粉气固两相流中煤粉体积分数与超声波衰减系数之间的关系,通过两支同轴且轴线与煤粉管道轴线成45°夹角的超声波探头测试煤粉的流速与煤粉颗粒的体积分数,实现了煤粉气固两相流中煤粉流量的在线检测。结果表明:采用超声波方法在线检测气固两相流中的煤粉流量与实际试验测试平台所设定的给煤量吻合较好,表明了该方法在线检测煤粉流量的可行性与可靠性。Based on ECAH theoretical model, the relationship between the pulverized coal volume fraction and the ultrasonic attenuation coefficient in pulverized coal solid-gas two-phase flow was analyzed. The pulverized coal flow velocity and volume fraction were measured with two ultrasonic probes whose axes were concentric with a 45° angle to the pulverized coal pipeline axis, and the on-line measurement of pulverized coal flux of pulverized coal solid-gas two-phase flow was realized. The results show that the test results obtained by ultrasonic method agreed well with the actual supply quantity of pulverized coal pre-set on the test platform, which indicated that measuring the pulverized coal flux with this method was feasible and reliable.

关 键 词：气固两相流 煤粉流量 超声波 在线检测 ECAH理论模型 

分 类 号：TG115.28[金属学及工艺—物理冶金]