摘要
由于１０００℃以上的高温和含有飞灰等恶劣环境，使得锅炉炉膛内烟气流速的测量极其困难。采用能适应恶劣环境，且具有强抗干扰能力的互相关测量技术，研制了一套高温烟气流速测量装置。在高温烟气流动试验台架上进行流速测量试验。试验结果表明装置能较精确地测量烟气流速，一次相关测量时间小于３秒，有可能开发成为用于炉内高温烟气流速测量的实用仪器。装置采用微差压传感器提取上下游烟气压力脉动信号，经数据采集卡将信号输入ＰＣ机，由ＰＣ机对采集的随机压力脉动信号进行互相关计算，求得高温烟气流经上下游传感器的渡越时间，从而计算出烟气流速。
Due to the high temperature over 1000℃ and the flying-ash,it is very difficult for the velocity measurement of flue gas in the boiler. To adapt adverse circumstance and have advantage of strong ability to resist interference, a set of measurement device is developed for conducting on-line velocity measurement in the high temperature flue gas device. Experiment results show that the device can measure the velocity accurately with the total time less than 3 seconds and could be developed into a practical device for high temperature velocity measurement in the boiler. In the device, two identical micro-pressure transducers are used to capture the pressure signals from the upstream and downstream of flue gas. By PCL-818 Data Acquisition Card, a personal computer gets randomized pulsating pressure signals from the transducers to make cross-correlation calculation. Consequently, the transit time of signals passing through upstream and downstream transducers can be obtained to calculate the flue gas velocity.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
1999年第6期615-618,共4页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金
关键词
高温烟气
互相关法
流速测量
电站锅炉
Velocity High temperature flue gas Transit time Cross-correlation
