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Inducement Mechanism of Turbulence at the Working Chamber in Float Glass Furnace and the Effect on the Energy Consumption

Author: XuShiQing
Tutor: LiuShiMin
School: Yanshan University
Course: Materials Science
Keywords: Float glass stream Heat unevenly ANSYS Numerical Simulation End face stripes
CLC: TQ171.6
Type: Master's thesis
Year: 2011
Downloads: 32
Quote: 0
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Abstract


Float glass quality of the product is stable, the first requirement of the process of the float glass furnace capable of continuously maintaining the stable, but the both sides in the width direction of the glass melting furnace, due to its external environment, caused by both sides of the furnace temperature on fluctuations; due to the influence of the structure of the furnace, and the external temperature fluctuations directly affect the equilibrium temperature of the bottom of the furnace section, causing the work of the Ministry of turbulence, bring a glass-liquid heat uneven. In this paper, the daily melting capacity of 500 t of molten glass float glass furnace as the the study simulation analysis using the ANSYS software FLOTRAN module. First establish a normal situation model, extracting the temperature at the bottom of the working portion, and then refine the model, and the model prototype simulation results contrast to confirm their viability, after which on the basis of the detailed model, the bottom of the working portion of the furnace The thermal asperity phenomenon numerical simulation, in order to analyze the changes on the molten glass in the liquid stream will bring uniformity compared to when leaving the furnace changes, and then under normal conditions with the collected end fringe image contrast verification. The simulation results show that the refined model can express the trend of the flow of the molten glass in the furnace unit under normal circumstances; furnace unit temperature difference will affect the allocation of melting kiln main liquid flow exists at the bottom of the furnace, bottom The higher temperature side of the glass from the lower reflux liquid will rise to the forward flow of the upper layer, and ultimately out of the melting furnace, resulting in a third circulation molten glass rise in the high temperature side; addition, due to the influence of temperature, the high temperature side the underlying reflux flow rate of the molten glass increases, will attract the surrounding glass solution as a flow compensation, including the bottom of the molten glass in the furnace width direction, i.e. the lower temperature side of the bottom of the molten glass will flow to the high temperature side. Affected by the bottom of the temperature difference, the trend of the flow of the molten glass existing in that the height direction of the furnace, there exists in the width direction of the furnace. The bottom of the work of the Ministry of uneven temperature also cause the glass fluid turbulence fluctuations, and when the temperature difference is greater than 42 ° C (measured 39 ° C), the uniformity of the molten glass serious deterioration. This simulation results with enterprise production logging, the corresponding glass stripes detection results phenomenon coincide; addition, due to the bottom transverse thermal bring this non-normal liquid flow driven circulation of traffic furnace, thereby an increase of the energy consumption of the furnace.

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CLC: > Industrial Technology > Chemical Industry > Silicate > Glass Industry > Production process and equipment
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