Method for accurately metering oil-water mass flow rate
A technology of mass flow and mass flowmeter, which is applied in the direction of mass flow measurement devices, etc., can solve the problems of different real speeds, non-corresponding speeds, complex flow mechanisms, etc., and achieve the effects of avoiding errors, accurate measurement, and simple and fast methods
Inactive Publication Date: 2010-07-21
SHANGHAI YINUO INSTR
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Problems solved by technology
However, when two immiscible fluids, oil and water, flow in the pipeline, the flow mechanism is quite complicated. Generally speaking, the real velocity of each phase is not the same, and usually does not correspond to the velocity at the inlet.
Since the water holdup is not equal to the water content, and there is a non-linear relationship between the water holdup and the water content, the calculation of the phase-separated flow rate directly by the water holdup instead of the water content will cause a large error
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[0007] The invention adopts a Coriolis mass flowmeter and a double-rotor flowmeter, the Coriolis mass flowmeter measures the total mass flow of the oil-water two-phase flow mixture, and the double-rotor flowmeter measures the total volume flow of the oil-water two-phase flow mixture , the volume flow measured by the dual-rotor flowmeter is transmitted to the Coriolis mass flowmeter by pulse or 4-20mA current or digital communication, and the Coriolis mass flowmeter uses the total mass flow M 混 and total volume flow V 混 , to get the average density of the oil-water two-phase flow mixture Then according to the average density ρ of the oil-water two-phase flow mixture 混 Obtain the volumetric water content of the mixed liquid of oil-water two-phase flow according to Get pure oil mass flow rate M 油 exact value of .
[0008] The present invention utilizes two data of mass flow rate and volume flow rate to obtain water content, and can also transmit both data of mass flow r...
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The invention provides a method for accurately metering oil-water mass flow rate, and relates to measurement of oil-water mass flow rate. The method for accurately metering the oil-water mass flow rate is provided, and a Coriolis mass flowmeter and a cubing meter are provided in the method, wherein the Coriolis mass flowmeter measures total mass flow rate of oil-water two-phase flow mixed solution; and the cubing meter meters the total volume flow rate of the oil-water two-phase flow mixed solution. The method is characterized in that: the metered volume flow rate is transmitted to the Coriolis mass flowmeter; the Coriolis mass flowmeter obtains the average density of the oil-water two-phase flow mixed solution by utilizing the total mass flow rate M mixture and the total volume flow rate V mixture; the volatile water content of the oil-water two-phase flow mixed solution is obtained according to the average density rho mixture of the oil-water two-phase flow mixed solution; and the accurate numerical value of pure oil mass flow rate can be obtained.
Description
technical field [0001] The invention relates to oil-water mass flow measurement. Background technique [0002] With the progress of society and the expansion of industrial production scale, the requirements for accurate measurement are also further increasing. Since the gradual development of Coriolis mass flowmeter in the late 1970s, as one of the most advanced and accurate flow measuring instruments in the world, it is widely used in petroleum, petrochemical, chemical, pharmaceutical, paper, food and energy industries. , It is widely used in process detection and custody transfer measurement, and has been highly valued by domestic and foreign flow measurement circles and welcomed by users. Compared with other flow meters, Coriolis mass flowmeter has many advantages. It can directly measure mass flow, density and temperature. It has high precision, good repeatability and wide range ratio; Measure liquids containing solid particles that are difficult to measure with other ...
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IPC IPC(8): G01F1/76
Inventor 康剑郭井和
Owner SHANGHAI YINUO INSTR