速度场系数在烟气流速测定中的应用与研究

Study on Velocity Field Coefficient and Its Application in Measurement of Flow Rate of Flue Gas

烟气流速测定是气态污染源排放总量监测的重要内容 ,关键问题是如何将连续监测系统的固定点烟气流速转化为监测断面的平均烟气流速。通过用参比方法对连续监测系统流速测定值进行校准 ,求出该监测断面的速度场系数。通过对两套连续监测系统的校准全过程的研究 ,证明速度场系数为一基本稳定值 ,经一段时间复验后其变化仍在容许范围之内 。

Measurement of flow rate of flue gas is an important part of pollutant source emission gross monitoring.The key point is how to convert flow rates of single points to the section average value in the continuous monitoring system.This can be resolved through calibrating the continuous monitoring system by reference method,and calculating the velocity field coefficient.The research of calibration of two sets of continuous monitoring systems shows that velocity field coefficient is basically constant.The values are within permissive range during re\|verification,and therefore it can be used to calibrate the continuous monitoring system.