Leakage detection of oil tank using terahertz spectroscopy

查看全文 作　　者：QIN [1,2]FanKai;CHEN [1,2]SiTong;CHEN [1,2]Ru;ZHAN [1,2,3]HongLei;MIAO [1,2,3]XinYang;XIANG [2,3]WenFeng;ZHAO [1,3,4]Kun

机构地区：[1]College of New Energy and Materials,China University of Petroleum,Beijing 102249,China;[2]Beijing Key Laboratory of Optical Detection Technology for Oil and Gas,China University of Petroleum,Beijing 102249,China;[3]Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection,Petroleum and Chemical Industry Federation,China University of Petroleum,Beijing 102249,China;[4]Detection and Beijing Key Laboratory of Failure,Corrosion,and Protection of Oil/Gas Facilities,China University of Petroleum,Beijing 102249,China

出　　处：《Science China(Technological Sciences)》索引2021年第64卷第9期,共6页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.11804392);the Science Foundation of China University of Petroleum,Beijing(Grant Nos.ZX20190163,2462020YXZZ019and 2462020YXZZ017)。 摘　　要：The necessity for safety in oil-gas storage and transportation has led to increasing technical requirements for on-line monitoring of damaged pores and oil leakage from tanks. In this study, the severity of damage of the oil tank at the micron level was detected by terahertz time-domain spectroscopy(THz-TDS), which is of great significance for the early detection and prevention of oil leakage. The THz amplitude(EP) was related to the severity of damaged according to the THz-TDS measurement of oil tanks with various degrees of damage, including intact, partially damaged, completely damaged, and seriously damaged points.Absorption and scattering effects co-occurred when the THz wave penetrated the tanks, with the collective tendencies being used to expressly monitor oil leakage from tanks. When the oil tank was damaged to form micron-level pores and the crude oil had not overflowed, the pore size was close to THz wavelength and the Mie scattering effect was obvious. After further destruction of the pores, the crude oil gradually spilled over and the scattering effect was gradually transformed from Mie scattering to Rayleigh scattering. In addition, the polar molecules in crude oil have strong resonance under the irradiation of THz wave, and the THz wave has strong attenuation. Eventually, surface tension of the oil flattens the surface of the tank, the scattering effect is gradually suppressed and replaced by the absorption effect. Absorption and scattering caused by THz waves passing through tanks coexist and have competing relationships. The change rule of EPcan successfully prove the phenomenon and can be considered as an important alternative for application to predict the degree of tank damage. Therefore, in this study, the detection of pores as small as micrometers on the oil tank was expected to greatly prevent oil leakage accidents and improve the safety of oil and gas storage and transportation. 关键词：ABSORPTION SCATTERING terahertz spectroscopy oil tank LEAKAGE

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Leakage detection of oil tank using terahertz spectroscopy

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