槽式聚光器镜面高压气流除尘实验研究  

Experimental Study on Dust Removal by High Pressure Air Flow in Mirror of Trough Condenser

作　　者：柳超 苏日力格 王亚辉[1] 张建广[2] 史伟 LIU Chao;SU Rilige;WANG Yahui;ZHANG Jianguang;SHI Wei(School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,Inner Mongolia Autonomous Region,China;Tianjin Blue Nest Electric Power Maintenance Co.,Ltd.,Hedong District,Tianjin 300171,China;Dalate Power Plant,North United Power Co.,Ltd.,Ordos 014300,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古自治区呼和浩特市010051 [2]天津蓝巢电力检修有限公司,天津市河东区300171 [3]北方联合电力有限公司达拉特发电厂,内蒙古自治区鄂尔多斯市014300

出　　处：《分布式能源》2024年第5期59-67,共9页Distributed Energy

基　　金：内蒙古自然科学基金联合面上项目(2023LHMS05047);内蒙古自治区直属高校基本科研业务费项目(JY20240049)。

摘　　要：太阳能聚光系统的镜面积尘不仅降低了光电转换效率,还缩短了系统的使用寿命。为此,搭建了槽式聚光镜面压缩空气除尘系统。运用扫描电子显微镜、激光粒度分析仪、X射线衍射仪和X射线荧光光谱仪等仪器,对积尘颗粒的晶体结构、尺寸分布、元素种类及其占比进行了分析。通过压缩空气除尘系统研究了风刀喷头的入口压力,镜面倾角,除尘高度对除尘效率的影响。结果表明,直径小于10μm的颗粒在积尘中所占比例超过50%,其中石英和白云母是积尘颗粒中主要的物质成分。积尘颗粒中的元素含量差异显著,氧元素含量最高,其次是硅元素,而氢元素的含量最低。除尘效率随着除尘压力的增加、镜面布置的倾角增大以及风刀喷头的除尘角度和高度减小而提高,最高除尘效率可达98.94%,此时镜面的积尘密度为0.03 g/m^(2),反射率为98.94%。The mirror area dust of solar concentrating system not only reduces the photoelectric conversion efficiency,but also shortens the service life of the system.Therefore,a trough type condenser mirror compressed air dust removal system is built.The crystal structure,size distribution,element types and proportion of the dust particles were analyzed by scanning electron microscope,laser particle size analyzer,X-ray difftometer and X-ray fluorescence spectrometer.Through the compressed air dust removal system,the influence of inlet pressure,mirror inclination and dust removal height on dust removal efficiency is studied.The results show that the particles smaller than 10μm in diameter account for more than half of the dust particles,and quartz and muscotite are the main material components in the dust particles.The content of elements in the dust particles was significantly different,with the highest content of oxygen,followed by silicon,and the lowest content of hydrogen.The dust removal efficiency increases with the increase of dust removal pressure,the increase of the inclination angle of the mirror arrangement,and the decrease of the dust removal angle and height of the air knife nozzle,and the highest dust removal efficiency can reach 98.94%.At this time,the dust accumulation density of the mirror is 0.03g/m^(2),and the reflectance is 98.94%.

关 键 词：槽式聚光吸热系统 积尘颗粒 物质组成 压缩空气除尘 除尘效率 

分 类 号：TK51[动力工程及工程热物理—热能工程]