储煤筒仓内煤体温度场数值模拟及温度测点布置优化  

Numerical simulation of coal temperature field in coal silo and optimization of temperature sensor layout

作　　者：尹新伟 赵彦彬 刘哲[2] 闫海鹰 李亚超 李卫华[2] YIN Xinwei;ZHAO Yanbin;LIU Zhe;YAN Haiying;LI Yachao;LI Weihua(Datang Environmental Industry Group Co.,LTD.,Beijing 100089,China;School of Energy and Mechanical Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]大唐环境产业集团股份有限公司机械输送事业部,北京海淀100089 [2]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《电力科学与工程》2019年第5期68-72,共5页Electric Power Science and Engineering

摘　　要：为了优化储煤筒仓壁面安装的温度测点布置方案,针对某电厂储煤筒仓,采用数值模拟的方法,通过在筒仓内设置高温热源,模拟煤自燃时筒仓内部温度场,获得了在不同热源位置、不同热源温度条件下储煤筒仓内煤体温度分布,并得到了内部热源的温度影响范围以及距热源距离不同时煤体温度分布规律,最后优化电厂储煤筒仓壁面测点布置方案。结果表明:热源温度为80℃时,影响范围主要在2 m以内,当热源温度达到300℃时,热源影响范围远大于5 m,且距离热源2 m处温度已经超过60℃;热源距壁面距离不同时,温度分布规律也是不同的;优化后的测点布置方案可以实现监测区域无盲区,保证储煤筒仓安全运行。In order to optimize the temperature measuring point arrangement scheme for the wall surface of the coal storage silo, a numerical simulation method is adopted for the coal storage silo of a power plant, and a high temperature heat source is set in the silo to simulate the internal temperature field of the silo during spontaneous combustion of the coal. The temperature distribution of the coal body in the coal storage silo under different heat source locations and different heat source temperatures, and the temperature influence range of the internal heat source and the temperature distribution law of the coal body when the distance from the heat source is different are analyzed, and finally the coal mine silo wall surface measurement Point layout plan, the results show that when the heat source temperature is 80℃, the influence range is mainly within 2m. When the heat source temperature reaches 300℃, the heat source influence range is much larger than 5 m, and the temperature from the heat source 2 m has exceeded 60℃. When the heat source is different from the wall surface distance, the temperature distribution law is also different. The optimized measuring point arrangement scheme can realize no blind zone in the monitoring area and ensure the safe operation of the coal storage silo.

关 键 词：储煤筒仓 温度场 数值模拟 测点优化 

分 类 号：TM621[电气工程—电力系统及自动化]