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Acoustic emission detection of slag performance in coal gasifiers 被引量:2
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作者 Zhengliang Huang Peng Zhang +5 位作者 Yao Yang Jingyuan Sun JingdaiWang Yongrong Yang Chenghao Huang Zhixiong Huang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第8期2200-2207,共8页
This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in a... This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in an industrial scale coal gasifier.Results show that the energy and variance of acoustic signals can realize the accurate detection of large slag(criterion:E>1.5 E0,S>1.2 S0),and the average relative error is only 0.28%.The acoustic energy in the frequency range of 20–40 k Hz is defined as the characteristic energy,which can realize the accurate detection of slag accumulation height and slag pool liquid level,and the average relative error is only 3.94%.Furthermore,AE detection also realize accurate detection of large slag in an industrial scale gasifier and the acoustic signals at slag screen can be used to realize the early warning of the slag collapse(5 h earlier). 展开更多
关键词 Acoustic emission(ae)detection Slag pool liquid level Slag accumulation height Early warning
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