气固流化床床高的测控研究

On-line measurement and control researchon the height of air-solid fluidized bed

在对目前常用气固流化床床高测量方法分析研究的基础上 ,开发应用性能优越、抗干扰能力强的雷达测距仪来进行选煤流化床床高的测量 ,提出采用逆系统控制方法解决气固流化床床高的控制问题 .床高采用闭环控制系统 ,雷达仪所测量的信号通过其内部的 Echofox软件分析处理后 ,经与设定值比较 ,根据偏差大小 ,控制循环介质给料机的转速 ,从而达到控制床高的目的 .图 5 ,表 1,参

On basis of analysis and research of the available measuring methods of air solid fluidized bed, radar range finder is developed for on line measurement and control height of fluidized bed in coal preparation. The radar instrument has a good performance and high anti jamming capability. A inverse system controlled method is put forward to use as the height control of fluidized bed, which has achieved a high control precision.5figs.,1tab.,4refs.