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A method for optimizing dtb crystallizer guide tube based on fluent

A crystallizer and guide tube technology, applied in numerical simulation, based on Fluent to optimize the field of DTB crystallizer guide tube, can solve the problems of low operating efficiency, low product quality, etc., achieve high operating efficiency, low equipment operation energy consumption, Improve the efficiency of structural design and optimization

Inactive Publication Date: 2020-07-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This purely empirical design method often leads to low quality equipment and low operating efficiency

Method used

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  • A method for optimizing dtb crystallizer guide tube based on fluent
  • A method for optimizing dtb crystallizer guide tube based on fluent
  • A method for optimizing dtb crystallizer guide tube based on fluent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method based on Fluent to optimize the DTB crystallizer guide tube, providing a numerical calculation method for determining the reasonable size of the DTB crystallizer guide tube, which is realized by the following steps:

[0036] Step 1: Establishment of geometric model of DTB crystallizer

[0037] Use Gambit software to build 5 geometric models of DTB crystallizers, and take the z-axis as the axis of rotation. Except for the diameter of the guide tube and the diameter and height of the stirring blade, the other dimensions of the 5 DTB crystallizer geometric models are exactly the same. The geometry of each DTB crystallizer The height of the guide cylinder of the model is the same, the diameter is 530mm, 730mm, 930mm, 1030mm, 1130mm, 530mm, the diameter of the stirring impeller is 500mm, and the height is 120mm. 530mm ratio OK.

[0038] Step 2: Mesh division of the simulation model

[0039] The entire DTB crystallizer geometric model is divided into two parts, tha...

Embodiment 2

[0049] Step 1: Establishment of geometric model of DTB crystallizer

[0050] Use Gambit software to build 4 geometric models of DTB crystallizers, and take the z-axis as the axis of rotation. The dimensions of the 4 DTB crystallizer geometric models are exactly the same except for the guide tube and stirring paddle, and the height of the guide tube of each DTB crystallizer geometric model is the same , the diameters are 630mm, 730mm, 830mm, 930mm, and 630mm. The diameter of the impeller is 600mm and the height is 140mm. The diameter and height of the other model impellers are determined by multiplying the diameter of the respective guide tube by the ratio of 630mm to 600mm and 140mm respectively.

[0051] Step 2: Mesh division of the simulation model

[0052] The entire DTB crystallizer geometric model is divided into two parts, that is, the paddle area and other areas, which are divided into tetrahedral meshes. The paddle area uses the pro function to encrypt the mesh of the ...

Embodiment 3

[0062] Step 1: Establishment of the geometric model of the DTB crystallizer;

[0063] Using Gambit software to establish 8 geometric models of DTB crystallizers, taking the z-axis as the axis of rotation, the dimensions of the 8 DTB crystallizer geometric models are exactly the same except for the guide tube and the stirring paddle. The height of the guide tubes of each model is the same, and the diameters are 260mm, 360mm, 460mm, 560mm, 660mm, 710mm, 760mm, 860mm, 260mm impeller diameter is 250mm, height is 60mm, other model impeller diameter and height are determined by multiplying 250mm and 60mm by the ratio of the respective guide tube diameter and 260mm.

[0064] Step 2: Mesh division of the simulation model

[0065] The entire computational domain model grid is divided into two parts, namely the paddle area and other areas, which are divided into tetrahedral meshes. The paddle area uses the pro function to encrypt the mesh of the blade part, with a maximum size of 60. Th...

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Abstract

The invention discloses a method for optimizing DTB crystallizer guide cylinders based on Fluent. The method comprises the steps of firstly establishing a plurality of DTB crystallizer geometric models; secondly utilizing Gambit pretreatment software to conduct mesh generation on each DTB crystallizer geometric model; then conducting single-phase simulation by using the computational fluid dynamics software, namely Fluent, on DTB crystallizers with the same type of geometric structures so as to simulate a series of flow fields of the DTB crystallizers under different stirring speeds; finally acquiring circulation flow volumes and torque of guide cylinders of different DTB crystallizers under different stirring speeds by using a report function, calculating the power of stirring according to the torque, drawing curves of the circulation flow volumes versus the power of stirring for comparison, and selecting a model corresponding to the rightest curve as an optimization model of the guide cylinders. According to the method for optimizing the DTB crystallizer guide cylinders based on Fluent, a new optimization scheme of sizes of the guide cylinders is provided, the structure design and the optimization efficiency of the guide cylinders of the DTB crystallizers are improved, and the optimized crystallizer is high in operation efficiency, low in equipment energy consumption and energy-saving.

Description

technical field [0001] The invention relates to a DTB crystallizer, in particular to a numerical simulation method for optimizing a DTB crystallizer draft tube based on Fluent. Background technique [0002] DTB crystallizer is a crystallizer with high efficiency that appeared in the late 1950s. It is one of the main forms of continuous crystallizer and can be used in the crystallization process of vacuum cooling method, evaporation method, direct contact method and reaction method. The feed liquid in the crystallizer circulates along the guide tube to form a circulation channel. The circulation volume has an important influence on the mixing of materials, the contact of crystals with saturated solution and the growth of subsequent crystals, and is an important indicator in the design of DTB. [0003] DTB crystallizers usually achieve material circulation by stirring. In order to make the circulation volume large enough, the optimization method of increasing the diameter of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20B01D9/00G06F111/06
CPCB01D9/00G06F30/20G06F2111/06
Inventor 那平赵思源刘勇徐凤云李亚楠
Owner TIANJIN UNIV