Method of analyzing oil and water fractions in a flow stream
    1.
    发明授权
    Method of analyzing oil and water fractions in a flow stream 失效
    分析流量中的油和水分数的方法

    公开(公告)号:US5331156A

    公开(公告)日:1994-07-19

    申请号:US15708

    申请日:1993-02-09

    摘要: Methods for quantifying the oil and water fractions of a fluid stream. A first method broadly includes making optical density (OD) measurements of the fluid stream by detecting photons of a first predetermined energy where the oil and water absorption characteristics are substantially identical (e.g., 1710 nm wavelength), and determining the oil and water fractions f.sub.o and f.sub.w according to OD.perspectiveto.f.sub.w .alpha..sub.w l+f.sub.o .alpha..sub.o l where .alpha..sub.w and .alpha..sub.o are related to the absorption coefficients of the oil and water at the predetermined energy, l is the path width of the fluid stream, and f.sub.w +f.sub.o =1. A second method which eliminates scattering effects utilizes the photons at the first predetermined energy and further utilizes photons of a second predetermined energy which is sufficiently close to the first predetermined energy such that the oil fraction is a linear function of the OD over the energy range. The oil and water fractions are then determined from the difference in optical density values (.DELTA.OD) according to .DELTA.OD=f.sub.o [(OD.sub.o,a -OD.sub.o,b)- (OD.sub.w,a -OD.sub.w,b)]+(OD.sub.w,a -OD.sub.w,b), where OD.sub.o,a, OD.sub.o,b, OD.sub.w,a, and OD.sub.w,b are the optical densities per unit length of pure oil (o) and pure water (w) at the first (a) and second (b) wavelengths.

    摘要翻译: 用于量化流体流的油和水分数的方法。 第一种方法广泛地包括通过检测第一预定能量的光子来测量流体流的光密度(OD),其中油和水吸收特性基本相同(例如,1710nm波长),并且确定油和水分数fo 和fw根据OD&persp&fw alpha wl + fo alpha ol,其中αw和αo与预定能量下的油和水的吸收系数相关,l是流体流的路径宽度,fw + fo = 1。 消除散射效应的第二种方法利用第一预定能量的光子,并进一步利用足够接近于第一预定能量的第二预定能量的光子,使得油分数在能量范围内是OD的线性函数。 然后根据DELTA OD = fo [(ODo,a-ODo,b) - (ODw,a-ODw,b)] +(ODw,a-ODw,b) - 的光密度值(DELTA OD) a-ODw,b),其中ODo,a,ODo,b,ODw,a和ODw,b是在第一(a)处纯油(o)和纯水(w)的每单位长度的光密度, 第二(b)波长。