Radio frequency moisture content measuring instrument in rotational flow state and method for measuring moisture content by same

Abstract

The invention belongs to the technical field of crude oil moisture content measurement, and particularly relates to a frequency moisture content measuring instrument in a rotational flow state and a method for measuring the moisture content by the same. The frequency moisture content measuring instrument comprises a sleeve, one end of the sleeve is horizontally connected with a cyclone, and the other end of the sleeve is vertically connected with a guide pipe; a radio frequency signal processing module and a communication wire protection cover are arranged outside the sleeve, and the communication wire protection cover supplies power to the radio frequency signal processing module and transmits signals through an internal wire; a radio frequency antenna connected with the radio frequency signal processing module is arranged in the sleeve; and the radio frequency signal processing module comprises an embedded single-chip microcomputer, a signal source generator, a signal amplifier, a data detection module and a data acquisition card. The moisture content is measured by utilizing the rotational flow state, the influence of unstable oil-water distribution is smaller, and a measurementresult is more accurate. By design of detachable parts, wax deposition and scaling on the surface of the antenna can be removed in time, parts are convenient to replace, and the service life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of measuring the water content of crude oil, and in particular relates to a radio frequency water content measuring instrument and a method in a swirling state. Background technique [0002] Water cut measurement in crude oil has always been an important part of three-phase flow measurement technology. At present, crude oil water content measurement technology is mainly divided into two categories, one is manual measurement method, also known as off-line measurement method, mainly including distillation method, electric stripping method and Karl Fischer method; the other is electrical measurement method, also called on-line measurement method. Measurement methods mainly include conductometric method, ray method, capacitance method, electromagnetic method and radio frequency method. [0003] At this stage, due to various unstable factors and imperfections in the online measurement method, the production line...

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Problems solved by technology

Therefore, the current actual production is facing a dilemma. The manual method has accurate and high-precision measurement results, but it is not representative and labor-intensive; the online method is convenient and timely, but the error is large, which cannot meet the requirements of actual production. Popularization and application It will take some time. Therefore, the research on the measurement technology of water content of crude oil needs to be broken through and solved.

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