Device for measuring oil, gas, water three phase flow containing rate

Abstract

The invention belongs to the multiphase flow measurement field, which mainly relates to the multiphase flow phase holdup measurement field and particularly discloses an oil-gas-water three-phase flow phase holdup measurement device which is based on an double helix capacitive sensor and can carry out precise measurement of the oil-gas-water three-phase flow holdup. The measurement device comprises at least one double helix capacitive sensor, a signal processing circuit, a weak capacitance measurement circuit and a moisture content measurement circuit which are respectively connected with the signal processing circuit, wherein, the double helix capacitive sensor is connected with the weak capacitance measurement circuit or the moisture content measurement circuit selectively; when a pipeline is filled with oil gas, the double helix capacitive sensor is connected with the weak capacitance measurement circuit, the signal processing circuit outputs the phase holdup of the oil; when the pipeline is filled with water, the double helix capacitive sensor is connected with the moisture content measurement circuit, and the signal processing circuit outputs the phase holdup of the water.

Description

technical field

[0001] The invention belongs to the field of measurement of multiphase flow, and mainly relates to the field of measurement of phase holdup of multiphase flow, in particular to a phase holdup measurement device of oil-gas-water three-phase flow, which is based on a double-helix capacitive sensor and can measure oil-gas-water three-phase flow Precise measurement of phase holdup. technical background

[0002] In petroleum, chemical, energy, power and other industrial processes, the multiphase flow state detection and the measurement of the flow of each phase are common problems faced in many technological processes, which directly affect or even determine the quality of the technological process and process equipment. safety and efficiency. For example, the online continuous metering technology of oil-water, oil-gas two-phase and oil-gas-water multiphase flow seriously restricts the development of economical and efficient development models of oil and gas fiel...

Examples

Embodiment Construction

[0021] refer to figure 1 , figure 2 , image 3 Make a double helix capacitive sensor. Two pieces of copper electrode plates 3 are screwed in the same direction outside a section of plexiglass circular tube 5 . Such as image 3 As shown, the expanded view of the copper electrode plate 3 is a parallelogram, and its height is πd (πd represents the circumference of the circle, and d represents the outer diameter of the plexiglass circular tube). The height of the copper electrode plate cannot be too short, otherwise it will cause the The electric field is not uniform enough, which affects the measurement accuracy; the short side of the parallelogram is 1 / 3πd long, the short side is parallel to the axis of the organic glass tube 5, and the long side is helically pasted. Copper electrode plate thickness 2cm. The axial distance between two copper electrode plates is 1 / 6πd. A total of two wires 1 and 2 with shielding mesh are drawn out from the geometric center of the two coppe...

technical field

[0001] The invention belongs to the field of measurement of multiphase flow, and mainly relates to the field of measurement of phase holdup of multiphase flow, in particular to a phase holdup measurement device of oil-gas-water three-phase flow, which is based on a double-helix capacitive sensor and can measure oil-gas-water three-phase flow Precise measurement of phase holdup. technical background

[0002] In petroleum, chemical, energy, power and other industrial processes, the multiphase flow state detection and the measurement of the flow of each phase are common problems faced in many technological processes, which directly affect or even determine the quality of the technological process and process equipment. safety and efficiency. For example, the online continuous metering technology of oil-water, oil-gas two-phase and oil-gas-water multiphase flow seriously restricts the development of economical and efficient development models of oil and gas fiel...

Examples

Embodiment Construction

[0021] refer to figure 1 , figure 2 , image 3 Make a double helix capacitive sensor. Two pieces of copper electrode plates 3 are screwed in the same direction outside a section of plexiglass circular tube 5 . Such as image 3 As shown, the expanded view of the copper electrode plate 3 is a parallelogram, and its height is πd (πd represents the circumference of the circle, and d represents the outer diameter of the plexiglass circular tube). The height of the copper electrode plate cannot be too short, otherwise it will cause the The electric field is not uniform enough, which affects the measurement accuracy; the short side of the parallelogram is 1 / 3πd long, the short side is parallel to the axis of the organic glass tube 5, and the long side is helically pasted. Copper electrode plate thickness 2cm. The axial distance between two copper electrode plates is 1 / 6πd. A total of two wires 1 and 2 with shielding mesh are drawn out from the geometric center of the two coppe...

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