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CN-122016240-A - Experimental device for be used for oily wax granule dense two-phase flow research

CN122016240ACN 122016240 ACN122016240 ACN 122016240ACN-122016240-A

Abstract

The application provides an experimental device for researching dense two-phase flow of oil wax particles, and relates to the technical field of hydrodynamic research. The experimental device comprises a circulating pipeline, a liquid storage tank, a detachable flow observation system, a first temperature-control water bath, a second temperature-control water bath, a peristaltic pump and a data monitoring system, wherein the circulating pipeline is communicated with the liquid storage tank to form a closed loop, a heat exchange pipe is spirally wound on the outer wall of the circulating pipeline and is communicated with the first temperature-control water bath, a heat exchange interlayer is arranged on the outer wall of the liquid storage tank and is communicated with the second temperature-control water bath, the detachable flow observation system comprises at least one section of transparent observation pipe serving as a test section and a high-speed camera, and the data monitoring system comprises pressure gauges and thermometer arranged at two ends of the transparent observation pipe and a flowmeter arranged on the circulating pipeline. The experimental device can realize high-fidelity experimental characterization of the oil wax dense two-phase flow process, thereby providing a reliable verification basis for a simulation calculation model.

Inventors

  • WANG YIJIE
  • TIAN ZIXUAN
  • HUANG QIYU

Assignees

  • 中国石油大学(北京)

Dates

Publication Date
20260512
Application Date
20260414

Claims (10)

  1. 1. The experimental device for researching dense two-phase flow of the oil wax particles is characterized by comprising a circulating pipeline, a liquid storage tank, a detachable flow observation system, a first temperature-control water bath, a second temperature-control water bath, a peristaltic pump and a data monitoring system; The circulating pipeline is communicated with the liquid storage tank to form a closed loop for circulating flow of dense two-phase slurry formed by mixing oil wax particles and oil products; The outer wall of the circulating pipeline is spirally wound with a heat exchange pipe, and the heat exchange pipe is communicated with the first temperature control water bath and is used for adjusting the temperature of the circulating pipeline; the outer wall of the liquid storage tank is provided with a heat exchange interlayer which is communicated with the second temperature control water bath and used for adjusting the temperature in the liquid storage tank; The detachable flow observation system comprises at least one section of transparent observation tube serving as a test section and a camera, wherein the transparent observation tube is connected to the circulating pipeline through a detachable joint, the transparent observation tube is consistent with the inner diameter of the circulating pipeline, and the camera is aligned with the transparent observation tube and is used for capturing the flow state of particles in slurry; the peristaltic pump is connected with the circulating pipeline and is used for driving the slurry to circularly flow in a closed loop; the data monitoring system comprises pressure gauges and temperature gauges arranged at two ends of the transparent observation tube and flow meters arranged on the circulating pipeline and is used for synchronously monitoring the pressure drop, the temperature and the flow of the slurry in the transparent observation tube; the real-time monitoring of pressure drop, temperature and flow of the transparent observation tube is used for quantitatively representing the thickness and the spatial distribution state of the viscous sediment.
  2. 2. The apparatus of claim 1 wherein a stirring means is provided in the reservoir for thoroughly mixing the wax particles with the oil prior to initiation of the experiment to form a uniform dense two-phase slurry.
  3. 3. The experimental device according to claim 1 or 2, wherein the circulating pipeline is further connected with a pressure purging pipeline for purging and drying the compressed gas in the circulating pipeline after the experiment is finished.
  4. 4. The experimental device according to claim 1, wherein the transparent observation tube is made of glass fiber, quartz or polymer transparent composite material, and has oil resistance, temperature resistance and compression resistance.
  5. 5. The experimental apparatus of claim 1, wherein the frame rate of the camera is not less than 1000 frames per second for capturing transient motion trajectories, sedimentation processes, and agglomeration behavior of the oil wax particles in the slurry.
  6. 6. The experimental set-up of claim 1, wherein the flow meter is a mass flow meter adapted for flow measurement of a non-conductive oil-based slurry.
  7. 7. The experimental set-up of claim 1, wherein the first and second temperature-controlled water baths are each equipped with an independent temperature control system for setting and maintaining the temperature of the circulation line and the reservoir, respectively.
  8. 8. The experimental set-up of claim 1, wherein the detachable joint is a quick-mount clip-on joint or a flanged connection, facilitating quick assembly and disassembly and replacement of the transparent viewing tube.
  9. 9. The experimental apparatus of claim 1, wherein the data monitoring system further comprises a data acquisition module and a host computer for acquiring, storing and displaying the pressure drop, temperature, flow and high-speed camera image data in real time and for achieving time synchronization of multi-source data.
  10. 10. The experimental set-up of claim 1, wherein the transparent viewing tube is positioned on a horizontal straight tube section of the circulation tube, and an upstream inlet end of the transparent viewing tube is greater than a predetermined distance from an outlet of the peristaltic pump and a nearest upstream tube elbow.

Description

Experimental device for be used for oily wax granule dense two-phase flow research Technical Field The application relates to the technical field of hydrodynamic research, in particular to an experimental device for researching dense two-phase flow of oil wax particles. Background Along with the popularization of normal-temperature storage of crude oil storage tanks, the blending and conveying of high-concentration and large-particle-size wax particles in tank bottom sludge has become a key challenge for guaranteeing the safe operation of pipelines. In the prior art, two types of methods, namely a macroscopic experiment and a numerical simulation, are mainly adopted to study dense two-phase flow. In macroscopic experiments, water is usually used as a carrier, particles such as sand are used as a solid phase, a non-viscous solid-liquid two-phase flow loop is constructed, and particle movement is observed through a transparent pipeline. In numerical simulation, a computational fluid dynamics-discrete element Method (Computational Fluid Dynamics-DISCRETE ELEMENT Method, CFD-DEM) coupling model is adopted, and momentum transfer and particle distribution rules between solid and liquid phases are analyzed. The result of the macroscopic experiment provides good data support for verification and correction of the numerical simulation model, the development and development of the numerical model greatly cover the extreme dangerous working condition, and the safety and reliability of two-phase flow are further guaranteed. However, the existing method is difficult to truly reflect the dense flow characteristic of high-concentration wax particles in oil-based non-Newtonian fluid, qualitative analysis is mostly adopted in the deposition process, a quantitative characterization method is lacked, experimental data are disjointed from industrial actual working conditions, and the application value of the method in simulation model verification is limited. Disclosure of Invention The application provides an experimental device for researching dense two-phase flow of oil wax particles, which realizes high-fidelity experimental characterization of the dense two-phase flow process of oil wax by independent temperature control, visual observation and multi-parameter synchronous acquisition and provides a reliable verification basis for a simulation calculation model. In a first aspect, the application provides an experimental device for oil wax particle dense two-phase flow research, comprising a circulating pipeline, a liquid storage tank, a detachable flow observation system, a first temperature-control water bath, a second temperature-control water bath, a peristaltic pump and a data monitoring system; The circulating pipeline is communicated with the liquid storage tank to form a closed loop for circulating flow of dense two-phase slurry formed by mixing oil wax particles and oil products; the outer wall of the circulating pipeline is spirally wound with a heat exchange pipe, and the heat exchange pipe is communicated with the first temperature control water bath and is used for adjusting the temperature of the circulating pipeline; The outer wall of the liquid storage tank is provided with a heat exchange interlayer which is communicated with the second temperature control water bath and is used for adjusting the temperature in the liquid storage tank; The detachable flow observation system comprises at least one section of transparent observation tube serving as a test section and a camera, wherein the transparent observation tube is connected to the circulating pipeline through a detachable joint, the transparent observation tube is consistent with the inner diameter of the circulating pipeline, and the camera is aligned to the transparent observation tube and is used for capturing the flow state of particles in slurry; the peristaltic pump is connected with the circulating pipeline and used for driving slurry to circularly flow in the closed loop; The data monitoring system comprises pressure gauges and temperature gauges arranged at two ends of the transparent observation tube and flow meters arranged on the circulating pipeline and is used for synchronously monitoring pressure drop, temperature and flow of the slurry in the transparent observation tube; Real-time monitoring of pressure drop, temperature and flow of transparent viewing tubes is used for high-fidelity characterization of viscous sediment thickness and spatial distribution. In one possible design, a stirring element is provided in the reservoir for thoroughly mixing the wax particles with the oil prior to the start of the experiment to form a uniform dense two-phase slurry. In one possible design, a pressure purge line is also connected to the circulation line for compressed gas purge drying of the interior of the circulation line after the end of the experiment. In one possible design, the transparent viewing tube is made of fiberglass, quartz or a poly