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Method for determining mixing time of multiphase flow by using RGB color model

A technology of mixing time and color models, applied in the field of chemical engineering, which can solve the problems of subjectivity of global measurement methods and unconvincing reliability of mixing time.

Inactive Publication Date: 2016-08-31
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It mainly includes colorimetric method and schlieren method. Both colorimetric method and schlieren method are based on naked-eye observation. Even in the same experimental environment and experimental conditions, different experimenters will produce many different results. There are subjectivity issues and the reliability of the resulting mixing times is often not convincing

Method used

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  • Method for determining mixing time of multiphase flow by using RGB color model
  • Method for determining mixing time of multiphase flow by using RGB color model
  • Method for determining mixing time of multiphase flow by using RGB color model

Examples

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Embodiment 1

[0044] Build an ISA furnace water model dynamics simulation experiment, use polystyrene particles to simulate the solid phase (matte), water is used to simulate the liquid phase (melt) in the chemical reactor, nitrogen is used to replace the top-blown gas phase (oxygen) . Nitrogen was sprayed down through a spray gun above the chemical reactor, and polystyrene pellets were spread flat on the bottom of the tank before the experiment, and agitation was achieved by nitrogen injection from the nozzle.

[0045] The specific operation steps of this embodiment are as follows:

[0046] (1) Use a high-speed digital camera (AVI format, 30 frames per second) to shoot and record the entire process of the ISA furnace water model experiment, and use the video processing software KMPlayer to capture and store 800 images reflecting the distribution of polystyrene particles. Flow pattern (pattern format is bmp), the experimental pattern obtained is as follows figure 1 shown;

[0047] (2) Ob...

Embodiment 2

[0065] (1) The ORC direct contact steam generator test platform was built. According to the orthogonal test table, this test uses an orthogonal test with 4 factors and 3 levels. See Table 4 for details. During the test, a high-speed digital camera (AVI format, 30 frames per second) was used to shoot and record the heat transfer process of the dispersed phase droplet group in the continuous phase heat transfer oil through the visible window. Save 500 patterns of the behavior change of the droplet group during the direct contact heat transfer process (the pattern format is bmp), and obtain the experimental pattern as follows Figure 7 As shown in A. The experiment was carried out at night, and the fluorescent lamp was turned off during the experiment shooting process, and a high-power light source was used to illuminate the visible window. After such treatment, it was found that the photographed pattern was less affected by the outside world, and it could accurately reflect the ...

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Abstract

The invention discloses a method for determining mixing time of multiphase flow by using a RGB color model, belonging to the technical field of metallurgical energy engineering. The method determines macroscopic mixing time of multiphase flow on the basis of statistical mean square deviation, average change rate and the RGB color model for image processing and is mainly applied to chemical engineering for determination of the mixing time of multiphase flow and evaluation of mixing effect. The method is simple and convenient, has high practical value and provides a reliable and practical method for evaluation of mixing time of chemical and metallurgical stirring equipment and theoretical guidance of designing of a stirring reactor.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method for determining the mixing time of all multiphase flows in the chemical industry. Background technique [0002] Mixing operation is an extremely common and important process in modern industry, so it is of great significance to research and develop efficient mixing technology and equipment. As the main characterization of mixing rate, mixing time is an important parameter often used to describe the mixing effect in a multiphase flow stirred tank. In the non-ferrous smelting process, common smelting methods mainly include flash smelting, Noranda smelting, Osmet smelting, silver smelting and ISA smelting. Among them, the metal or mineral in the metallurgical reactor of the ISA furnace is in a molten state, and the gas phase or liquid phase coexists with it as a continuous phase. Traditional laboratory research and on-site observation can no longer meet the ne...

Claims

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Application Information

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IPC IPC(8): G01N21/25
CPCG01N21/25
Inventor 徐建新武凯王仕博
Owner KUNMING UNIV OF SCI & TECH
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