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Method for optimizing glass production link based on glass tin bath mathematical model

A mathematical model and production link technology, applied in the control/adjustment system, comprehensive factory control, instruments, etc., can solve problems such as large deformation, increased lateral temperature difference of glass plates, flatness, uniformity of thickness difference, etc.

Pending Publication Date: 2020-10-23
QINHUANGDAO GLASS IND RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the glass forming process, the molten glass has the characteristics of large deformation and difficulty in determining the boundary during the process of transforming into glass plates. With the continuous increase of the tonnage of the existing glass production line, the thickness of the glass plate is getting thinner and thinner, and the width of the original glass plate is increased. The increase of the drawing speed and the strengthening of the edge reflow will lead to the continuous increase of the lateral temperature difference of the glass plate in the tin bath, and there will be quality problems such as flatness, thickness difference and uniformity after the glass is pulled out of the tin bath.
In the past, craftsmen relied on experience to operate, and they needed to experience long-term practice on the production line to explore, which consumed a lot of capital, time and labor costs, especially some tasks were difficult to complete through experiments.

Method used

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  • Method for optimizing glass production link based on glass tin bath mathematical model
  • Method for optimizing glass production link based on glass tin bath mathematical model
  • Method for optimizing glass production link based on glass tin bath mathematical model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Example 1: Establishment of the mathematical model of the glass tin bath and the working simulation of the glass tin bath

[0089] Step 1, establishment of geometric model:

[0090] Taking a 150t / d glass tin bath for the production of medium-alumina glass as a prototype, use GstarCAD software to establish a geometric model including the glass ribbon space and the protective gas space.

[0091] The prototype parameters of the glass tin bath mainly include: the length of the glass tin bath is 37.8 meters, the width of the wide section is 5.2 meters, and the narrow section is 4.5 meters. At 18000mm (the twelfth pair of edge pulling machines), there are 14 air inlets on the top of the glass tin bath, which are symmetrical and arranged in an array with the tin bath axis as the center. Specifically, the wide section is 24m×5.2m (length×width), the length of the shrinking section is 3m, and the width changes linearly, and the narrow section is 10.8m×4.5m (length×width).

[0...

Embodiment 2

[0159] Example 2: Optimization of the Mathematical Model of the Glass Tin Bath

[0160] Since the actual working state of the glass tin bath is affected by many factors, for example, the speed and temperature of the glass ribbons in the glass tin bath are inconsistent, the number and arrangement of the air inlets. In order to simulate the actual working state of the glass tin bath as realistically as possible, the mathematical model of the glass tin bath can be optimized.

[0161] A. In view of the fact that the actual values ​​of the velocity and temperature on both sides of the glass ribbon in the glass tin bath may be inconsistent: since the boundary conditions set in the simulation of Embodiment 1 are generally set in a manner symmetrical to the center line of the tin bath, the simulation results The data and image display are symmetrical, but the actual situation is: the speed of the glass ribbon on the side with high temperature is relatively fast, and the speed of the g...

Embodiment 3

[0167] Example Three: Application of the Mathematical Model of the Glass Tin Bath

[0168] This embodiment utilizes the mathematical model of the glass tin bath that has been established and verified. When there is a quality problem in the glass plate produced by the existing glass tin bath or a problem occurs in the glass process, the calculation of the mathematical model can be used to quickly find the problem. Reduce the maintenance cost and difficulty of the glass tin bath.

[0169] Existing glass tin bath and production overview:

[0170] Glass type: medium aluminum glass (the mass content of alumina in glass is generally between 4% and 8%);

[0171] Production capacity: 150t / d;

[0172] Tin bath parameters: the wide section is 24m x 5.2m (length x width), the length of the shrinkage section is 3m, and the width changes linearly, and the narrow section is 10.8m x 4.5m;

[0173] Protective gas composition: Nitrogen: 92%, Hydrogen: 8%;

[0174] Taking the above-mentione...

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Abstract

The invention provides a method for optimizing a glass production link based on a glass tin bath mathematical model. The mathematical model can simulate the working principle of the glass tin bath atlow cost; the temperature and speed distribution of a glass tape and the temperature and speed distribution condition of protective gas in a glass tin bath forming process are simulated; by means of the model, the structure of an existing glass tin bath can be improved, glass production links such as the design and production process of a new glass tin bath are optimized, the design of the glass production links can be better saved, and the cost can be better optimized.

Description

technical field [0001] The invention relates to a modeling optimization technology for a glass tin bath forming process, in particular to a method for optimizing glass production links based on a glass tin bath mathematical model. Background technique [0002] In the glass production process, the tin bath is an important thermal equipment in the glass production process and is the forming area of ​​the glass. The biggest difference between a tin bath and thermal equipment such as kilns and annealing kilns is that the tin bath contains tin liquid that is easily oxidized at high temperatures, so the tin bath space is also filled with a protective gas that prevents the oxidation of tin liquid. [0003] After the glass raw material is heated by the kiln, it passes through the cooling part and launder of the glass kiln, and the molten glass with a temperature of about 1100 ℃ in the kiln is transported to the surface of the tin bath in a certain temperature system. , relying on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/4185G05B2219/31088Y02P90/02Y02P40/57
Inventor 陈福续芯如刘涌张向春冯建业
Owner QINHUANGDAO GLASS IND RES & DESIGN INST
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