流化床风室与炉内压力波动信号的对比研究与分析  

Wind Chamber and the Furnace Pressure Fluctuation Signal of Fluidized Bed Comparison and Analysis

作　　者：崔晓通[1] 李海广[1] 李笑然[2] 李义科[1] 武文斐[1] 

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010 [2]华能上安电厂,河北石家庄050000

出　　处：《锅炉技术》2015年第3期35-39,共5页Boiler Technology

基　　金：内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室项目(BO-13-006)

摘　　要：基于鼓泡流化床的冷态试验台,对流化床风室、炉内的压力信号进行采集,利用自相关函数的傅里叶变换和Welch功率谱估计法处理压力波动信号,得到了功率谱密度（power spectral density,PSD）随频率的分布情况。试验不同静床高下,研究不同压力测点的压力波动信号特性,并对风室与炉内的压力波动信号进行对比研究分析。结果表明：压力信号频谱的5~7 Hz频段表征了流化床内物料量特征信息,且风室和炉内测点压力波动信号都包含了流化床物料量的特征信息。对以后流化床压力测点位置的选择与炉内物料的实时检测与控制等提供了重要价值。Based on the cold fluidized bed test rig, collected the pressure fluctuation signals of the wind chamber and furnace. Calculation for pressure fluctuation signal of the autocorrelation function, and applies the Welch power spectrum estimation method, obtained the power spectral density （power spectral density, PSD） on frequency distribution. Experiment by changing the material of fluidized bed furnace, analyses the pressure fluctuation signal characteristic of the different pressure measuring point, to the wind chamber and furnace pressure fluctuation signal of comparative research and analysis. The results show that the pressure signal spectrum of 5 - 7 Hz frequency contains the amount of material information. And wind chamber and furnace inner point pressure fluctuation signal contains material of feature information. Pressure measuring point location choice and the measurement and control of the amount of material in the furnace and provides significant value in the future.

关 键 词：鼓泡流化床 Welch谱估计 压力波动信号 功率谱密度 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]