基于光学遥测的储罐VOCs泄漏及排放监测评估技术研究

Research on Monitoring and Evaluation Technology of VOCs Leakage and Emission from Storage Tank based on Optical Telemetry

依托光学遥感监测技术,结合气象监测数据,形成了以质量通量为核心的储罐VOCs泄漏及排放监测评估方法。为了探索评估方法的边界适用条件和检验评估方法的准确性,在我国北方某实验基地进行了丁烷气体释放实验。以排放量预测值与真实排放量的比值R为评价指标,研究表明,在近距离监测实验中,风速、风向角度、模拟源高度(监测截面高度)等均是影响评估方法准确度的重要因素,其中风速宜大于1 m/s,风向角度宜处于0~22.5°范围内,截面高度以1~1.5倍的模拟源高度为最优,此时R的平均值接近于理想值1。

Relying on the optical remote sensing monitoring technology,the VOCs concentration in the monitoring section was reconstructed by taking three optical path cycle monitoring in the monitoring section as the monitoring means.Combined with the meteorological monitoring data,a monitoring and evaluation method of VOCs emission from storage tanks with mass flux as the core was formed.In order to explore the applicable boundary of the evaluation method and test the accuracy of the evaluation method,a propane gas release experiment was conducted at an experimental base in northern China.The ratio R of the predicted emission value to the actual emission amount was used as the evaluation index.In simulation experiments,wind speed,wind direction angle,and simulated source height(monitoring section height)were all important factors affecting the accuracy of the assessment method.The wind speed should be greater than 1 m/s,and the wind direction angle should be in the range of 0~22.5°,and the cross-section height should be 1~1.5 times of the simulated source height.At this time,the average value of R was close to the ideal value 1.