直吹式制粉系统煤粉相对浓度测量的研究  

Measurement of Relative Pulverized Coal Concentration in Direct-fired System

作　　者：浦兴国[1] 潘晓辉[1] 周洁[1] 袁镇福[1] 

机构地区：[1]浙江大学热能工程研究所,能源清洁利用与环境工程教育部重点实验室,浙江杭州310027

出　　处：《锅炉技术》2004年第6期52-54,61,共4页Boiler Technology

摘　　要：初步实验研究表明电容传感器输出电压随煤粉浓度呈单调上升趋势,且都有较好的线性度和较高的灵敏度,有望用于直吹式制粉系统煤粉相对浓度的在线检测。煤粉水分经常改变,使传感器的电容量随着变化,因此电容传感器不适宜水分经常变化的煤粉的浓度测量。但对煤粉相对浓度的测量没有影响,少量水分反而能提高相对煤粉浓度测量的灵敏度。The primary experiments indicate that the output voltages become high with increasing the concentrations of coal,which has a good linearity and a high sensitivity. So it can be used measure the coal relative concentration in the direct fired system. The capacity of the sensor changes greatly due to the varied moisture content,so this method is infeasible to measure the coal concentration.However the moisture content has no influence on the coal relative concentration,this method can get much accurate measurement results of the coal relative concentration when the coal contains a small amount of water.

关 键 词：电容传感器 煤粉浓度 直吹式制粉系统 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]