差压式密度计在选煤厂中的应用与改进

Application and improvement of differential pressure densimeter in coal preparation plant

针对差压式密度计易受安装位置及所测量流体周围波动的影响而产生零点漂移的问题,设计并改进了差压式密度计旁路安装管路,对于减少冲击所引起的误差、防治堵塞管道和提高膜片使用寿命,效果非常显著;提出利用数字平滑滤波算法对采集信号进行滤波处理,在不影响测量精度的前提下,提高了差压式密度计的稳定性。实际应用结果表明,改进后的差压式密度计的可靠性、稳定性和精确度均能满足实际应用要求。

For problem of zero drift of differential pressure densimeter which is susceptible to installation location and fluctuations of measured fluid, bypass installation pipes of differential pressure densimeter was designed and improved, and effect was significant for reducing error caused by shock, preventing clogging of pipelines and advancing service life of diaphragm; digital smoothing filtering algorithm for filtering processing of collected signals was proposed, which improved stability of differential pressure densimeter on the premise that it did not affect measurement accuracy. The practical application results show that the improved differential pressure densimeter can meet requirements of practical application on respects of reliability, stability and accuracy.