CAJ | 학술논문

为了获得电站锅炉炉膛温度信息,开发了单路径炉膛烟气温度声学监测系统,引入伪随机序列作为声源信号.在国内某200MW和300MW锅炉上进行了热态试验研究,并利用自制的K型陶瓷热电偶对测量温度进行了标定.结果表明：伪随机序列信号可以作为声学测温的声源信号,但由于其频带过宽,必须进行处理,使其能量集中;测温系统测量的烟气温度与热电偶测量温度相比,误差在2%以内;基于伪随机序列声源的声学测温系统所测温度曲线与负荷曲线吻合,具有很好的稳定性.
위료획득전참과로로당온도신식,개발료단로경로당연기온도성학감측계통,인입위수궤서렬작위성원신호.재국내모200MW화300MW과로상진행료열태시험연구,병이용자제적K형도자열전우대측량온도진행료표정.결과표명：위수궤서렬신호가이작위성학측온적성원신호,단유우기빈대과관,필수진행처리,사기능량집중;측온계통측량적연기온도여열전우측량온도상비,오차재2%이내;기우위수궤서렬성원적성학측온계통소측온도곡선여부하곡선문합,구유흔호적은정성.
To obtain the temperature field in boiler furnace,a single-path monitoring system was developed for temperature measurement of flue gas in boiler furnace using pseudo-random sequence signal.Hot-state experiments were carried out for two boilers of respectively 200 MW and 300 MW,of which the measurements were verified by self-developed K ceramic thermocouples.Results show that the pseudo-random sequence signal can be taken as sound source signal in acoustic pyrometry after its too broad bandwidth is narrowed so as to concentrate the energy.The measurement error between acoustic pyrometry and thermocouple method is within 2%,and the curve of temperature measured by acoustic pyrometry using pseudo-random sequence signal agrees well with that of the unit load,proving the measurements to be reliable.