多通道超声波技术在火电污染源排放监测中的应用

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中图分类号：TM611;TQ534 文献标志码：A

Application of multi-channel ultrasonic technology in emission monitoring of thermal power pollution sources

CHENG Qianxiang' ，YANG Jingqi1 ，SHI Xin' ，ZHANG Yuenian’，LI Hongyu' ，TIAN Wanqing² （1.National energy God Anhui Hefei power generation Co.，Ltd.，Hefei 23OO31，China; 2.BeijingNew Leaf Technology Co.，Ltd.，Beijing 1Ooo85，China）

Abstract：In the fieldof emisson monitoring of stationary pollution sources of thermal power，oneof the key problems facing the accuratecalculationof emisions from stationarypolution sources is theaccuracyand stability of flowrate measurement.Inorder tosolve thischallnge，theaccuracyand stabilityof thecalculationof polution source emisions are improved through the research andapplication of multi-channel ultrasonic flowvelocity measurement technology.The specific method is to installtwoor more pairs of ultrasonic transducers to measure the flow rate of diferent channels and perform data fusion processing to improve the measurement accuracy and reliability. This technology uses the time diference of sound wave propagation to calculate theflow rate，and has been applied in thedesulfurizationemission flueof coal-fired power plants.Thespecific embodimentis to installtwo pairs of ultrasonictransducers onthe desulfurization discharge main pipeline，and the signals are independently analyzed and calculated bythe integrated processing system.The technologyachieves continuousand stableoperation and is highlycorrelated with the measurement data of the matrix flow meter.

Key words：flow velocity measurement technology;average flow rate;multi-channel ultrasound;desulfurization flue gas pollution emissions

火电烟气固定污染源排放的监测中，计算主要涉及到浓度测量与烟气流量，而烟气流速是确定烟气流量的关键参数之—[2-3]。（剩余6001字）