Spherical particle surface liquid phase information identification method, system and medium

A spherical particle and information identification technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve problems such as lack of knowledge and ambiguity of the details of the gas-liquid phase behavior of the trickle bed, so as to increase the number of monitoring lines and reduce calculations Quantity and data post-processing time, and the effect of improving accuracy

Pending Publication Date: 2022-05-06
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many reports on the macroscopic, mesoscopic, and microscopic studies of the trickle bed by using simulation methods, and some characteristics of the trickle bed are analyzed from some angles, but there is often a lack of specific data such as liquid film thickness cloud images, etc. Numerical quantification and a description method that can intuitively reflect the behavior of the liquid phase, the cognition of the details of the behavior of the gas-liquid phase inside the trickle bed is still vague

Method used

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  • Spherical particle surface liquid phase information identification method, system and medium
  • Spherical particle surface liquid phase information identification method, system and medium
  • Spherical particle surface liquid phase information identification method, system and medium

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Embodiment 1

[0032] This embodiment discloses a method for identifying liquid phase information on the surface of spherical particles, such as figure 1 shown, including the following steps:

[0033] S1 builds a double-layer O-block structure grid for a single spherical particle, simulates the surface of the spherical particle based on the VOF model, and forms a file that needs to be analyzed. The files that need to be analyzed are divided into case files and data files.

[0034] It is assumed that the simulated object in this embodiment is a standard spherical particle, and the surface of the spherical particle has a certain roughness. Determine the center coordinates of the spherical particle, the upper limit of the liquid film thickness and the number of monitoring lines (that is, the value of N). The double-layer O-block structure grid is generated linearly along the radial direction of spherical particles. In this embodiment, the center coordinates of spherical particles are set as (...

Embodiment 2

[0074] Based on the same inventive concept, this embodiment discloses a system for identifying liquid phase information on the surface of spherical particles, including:

[0075] The grid generation module is used to construct a double-layer O-block structure grid for a single spherical particle, and simulate the surface of the spherical particle based on the VOF model;

[0076] The monitoring line generation module is used to set the monitoring line on the surface of the spherical particle along the radial direction, and calculate the liquid phase fraction information of the monitoring line;

[0077] The spatial position judgment module is used to judge the grid on the spherical particle surface in each monitoring line and the hemisphere to which each monitoring line belongs according to the spatial position of the monitoring line;

[0078] The output module is used to calculate the liquid phase wetting rate on the spherical particle surface, the average thickness of the liqu...

Embodiment 3

[0080] Based on the same inventive concept, this embodiment discloses a computer-readable storage medium that stores one or more programs, and the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform the above-mentioned spherical A method for identifying liquid phase information on particle surfaces.

[0081] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

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Abstract

The invention belongs to the technical field of petrochemical engineering, and relates to a spherical particle surface liquid phase information identification method and system and a medium, and the method comprises the steps: constructing a double-layer O-block structure grid for a single spherical particle, and simulating the surface of the spherical particle based on a VOF model; a monitoring line is arranged on the surface of the spherical particle in the radius direction, and liquid phase fraction information of the monitoring line is calculated; according to the spatial positions of the monitoring lines, grids on the surface of the spherical particles in each monitoring line and a hemisphere to which each monitoring line belongs are judged; and according to the liquid phase fraction information of the monitoring lines on the grids on the surfaces of the spherical particles, calculating the liquid phase wetting rate and liquid film average thickness of the surfaces of the spherical particles, the liquid phase volumes corresponding to the monitoring lines and the liquid holdup of the surfaces of the spherical particles, and drawing a mapping cloud picture in the vertical direction in an upper hemisphere and a lower hemisphere. The method can be used for carrying out auxiliary analysis and identification on liquid phase information on micro-scale single spherical particles in a trickle bed.

Description

technical field [0001] The invention relates to a method, system and medium for identifying liquid phase information on the surface of spherical particles, belonging to the technical field of petrochemical industry, in particular to the technical field of judging the microscopic liquid phase flow state in the bed of a trickle bed hydrogenation reactor. Background technique [0002] As a widely used reactor in diesel hydrodesulfurization process, the trickle bed hydrogenation reactor often has the problem of low reaction efficiency, so a large amount of excess circulating hydrogen is required in actual operation; the liquid phase hydrogenation reactor proposed and industrialized in recent years Hydrogenation technology dissolves hydrogen in the oil phase, and changes a large amount of circulating hydrogen into a large amount of circulating oil. Although there is some improvement in energy consumption and other aspects, it still does not change the problem of excessive material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/28G06F111/10G06F113/08
CPCG06F30/23G06F30/28G06F2113/08G06F2111/10
Inventor 蓝兴英魏斌石孝刚高金森郭润
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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