KR20030022573A - Simulation apparatus for glass melting furnace - Google Patents

Abstract

PURPOSE: An apparatus for a model test of a glass melting furnace is provided to accurately realize flowing of fluid by accurately and simply controlling voltage applied to heaters heating the fluid, thereby improving the reliability and reproducibility of data obtained by the model test. CONSTITUTION: A glass melting furnace model(10) is formed of a melter model(12), a throat model(14) connected with the melter model, and a refiner model(16) connected with the throat model. A plurality of heaters(20) is installed to heat fluid flowing in the melter model by the area. A voltage controller(30) controls voltage applied to each heater. A computer(50) is connected with the voltage controller by a digital-to-analog converter(40) and controls the voltage controller to control driving of the heaters through the voltage controller.

Description

SIMULATION APPARATUS FOR GLASS MELTING FURNACE

The present invention relates to a simulation apparatus for the glass melting furnace, and more particularly, in the glass melting furnace model for the simulation of the glass melting furnace to accurately control the heaters for heating the fluid for the analysis of the thermal flow field to improve the reliability and reproducibility The present invention relates to a simulation apparatus for glass melting.

As is well known, simulations or model tests are used in various fields to identify and solve problems that may be caused by various factors in actual situations. Technology that combines software and hardware is being actively developed to more accurately reproduce closer situations.

On the other hand, panel and funnel for cathode ray tube manufacture molten glass lump called glass gob by press molding, and molten glass is made by glass melting furnace called glass raw material. It is manufactured by melting. Glass melting includes a melter that melts glass raw materials, a throat that discharges molten glass from the melter, a refiner that removes and homogenizes bubbles in the molten glass, and a forehearth. ) And a feeder for supplying molten glass are continuously connected.

Looking at the configuration of such a glass melting furnace, the melting tank of the glass melting furnace is divided into an upstream heating zone for melting the supplied glass raw material and a downstream cooling zone for controlling the temperature of the molten glass, There is a hot spot between the heating zone and the cooling zone. In the heating area around the hot spot of the molten bath, a rear roll in which the molten glass flows in a counterclockwise direction is generated, and in the cooling region, a front roll in which the molten glass flows in a clockwise direction is generated. And hot spots generate hot springs that float from the bottom of the molten bath to the surface.

Further, a clarification tank is connected downstream of the melting tank by a throat. The heating zone of the melting tank is provided with a gas and oxygen burner for melting the glass raw material and an electric booster device for raising the temperature of the molten glass, and cooling air for cooling the molten glass is supplied to the cooling zone. Melting baths, throats and clarification baths in such glass melting furnaces should be designed and constructed in such a way that the melting, flow or flow of molten glass can be stably maintained and can be homogenized thermally, chemically and physically.

However, in the melting furnace of the glass melting furnace maintained at a high temperature of more than 1,500 ℃ it was very difficult to directly obtain data on the melting, flow, etc. of the molten glass. Therefore, the data on the melting and flow of molten glass in the melting vessel into the glass melting furnace are obtained by numerical analysis through simulation, and the simulation data is reflected in the design and construction of the glass melting furnace or used in the process. This aims to improve quality and increase productivity.

As an example of the prior art, in the melting furnace model of the glass melting furnace model that models the melting furnace of the glass melting furnace, a plurality of heaters are installed in the melting bath model, and the voltage applied to each heater is individually controlled by the operator by manual operation. The thermal flow field of the fluid is analyzed in the molten bath model.

However, when the experimenter individually controls a plurality of heaters by manual operation, reliability and reproducibility are greatly degraded due to the mistakes of the experimenter and internal and external factors such as the experimental environment, and as a result, the reliability and reproducibility of the simulation data are also degraded. There is. In addition, since the heat of the heaters must be controlled for each area of the molten bath model for the simulation, the simulation involves a lot of time.

The present invention has been made to solve the various problems of the prior art as described above, the object of the present invention is to accurately and simply control the voltage applied to the heaters in the simulation of the glass melting furnace reliability and reproducibility of the simulation It is in the simulation apparatus of glass melting furnace which can greatly improve the

Another object of the present invention is to provide a fluid level control device of a simulation model that can automatically and quickly control the temperature of each region of the glass melting furnace by a simple configuration.

In order to achieve the above object, the present invention is characterized in that, in the melting furnace model of the glass melting furnace model, in which the melting tank model and the clarification tank model are connected by the throat model to enable the flow of the fluid, the flow in the melting bath model of the glass melting furnace model A plurality of heaters installed to heat the fluid to be provided in each region; A voltage controller for controlling a voltage applied to each of the heaters; It is connected to a voltage controller and a digital / analog converter, and simulates a glass melting furnace consisting of a computer that outputs a digital signal for controlling the voltage controller so as to control the driving of the heaters through the voltage controller.

1 is a view showing for explaining the simulation apparatus for glass melting furnace according to the present invention,

2 is a view showing the flow of the fluid by the heating of the heaters in the simulation apparatus to the glass melting furnace according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

1: Fluid 10: Glass Melting Furnace Model

12: molten bath model 14: throat model

16: Clarification Tank Model 20: Heater

30: voltage controller 40: digital / analog converter

50: computer

Hereinafter, a preferred embodiment of the simulation apparatus for the glass melting furnace according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to Figure 1, for the simulation of the present invention is provided with a glass melting furnace model (10) modeling the glass melting furnace for producing molten glass for producing glass products, such as panels for cathode ray tubes and chanel. .

The glass melting furnace model 10 is a molten bath model 12, a throat model 14 connected to the downstream of the molten bath model 12, and a clarification tank model connected to the downstream of the throat model 14. It consists of (14). The molten bath model 12 and the clarification tank model 16 are connected by the throat model 14 to allow flow or flow of the fluid 1. The glass melting furnace model 10 is produced by reducing the size of the actual glass melting furnace, for example, about 40: 1, and simplifying the construction that does not affect the simulation. The glass melting furnace model 10 has been described as being composed of the melting bath model 12, the throat model 14 and the clarification tank model 21 in the glass melting furnace, but this is illustrative, and various configurations that require the simulation of the fluid and It may also consist of a model of the form, for example a forward bath and a feed bath for glass melting furnaces.

On the other hand, the molten bath model 12 of the glass melting furnace model 10 has a certain level of fluid (1), such as glycerin, silicone oil (Silicon Oil) similar to the molten glass and dimensionless physical properties to have a certain level To supply. In addition, a plurality of heaters 20 are installed along the longitudinal direction of the molten bath model 12 so that the fluid 1 may be heated for each region above the molten bath model 12.

In addition, each of the heaters 20 is connected by a voltage controller 30 for controlling the voltage applied to each of the heaters 20 and wires 32a and 32b, and the voltage controller 30 is a digital / analog converter. It is connected to the computer 50 by (D / A Converter: 40). The digital / analog converter 40 converts the digital signal of the computer 50 into an analog signal and transmits it to the voltage controller 30.

Looking at the operation of the simulation apparatus to the glass melting furnace having such a configuration, first to supply the required fluid (1), for example, glycerin to the molten crude model 22 of the glass melting furnace model 20 for simulation Have a level flow. The fluid 1 supplied to the melting bath model 22 of the glass melting furnace model 20 flows through the throat model 24 to the clarification tank model 26 and is well known from the downstream of the clarification tank model 26. The fluid 1 may be pumped by the fluid pump and supplied again upstream of the molten bath model 22. Therefore, it is possible to continuously maintain the flow of the fluid 1 in the glass melting furnace model 20.

Next, when a digital signal for controlling the heaters 20 is output by a program of the computer 50, the digital signal of the computer 50 is converted into an analog signal by the digital / analog converter 40 and then the voltage controller ( 30). The voltage controller 30 controls the voltage applied to each of the heaters 20, and thus heat generated by driving of each of the heaters 20 is controlled.

As shown in FIG. 2, in the molten metal mold 22 of the glass melting furnace model 20, the fluid 1 heated by regions of the heaters 20 flows like the molten glass in the actual glass melting furnace. . That is, the rear fluid roll 1a in which the fluid 1 flows counterclockwise is generated upstream of the molten coarse mold 22, and in the downstream, the front fluid roll 1b in which the fluid 1 flows in the clockwise direction. Is generated. Then, as in the hot spot of the glass melting furnace, a hot spring fluid 1c is formed between the rear fluid roll 1a and the front fluid roll 1b, which floats from the bottom of the molten bath model 12 to the surface. Thus, by precisely reproducing the flow of the fluid 1 similar to that of the actual glass melting furnace model in the melting furnace model 22 of the glass melting furnace model 20, the reliability and reproducibility of the data obtained by the simulation are greatly improved. You can.

On the other hand, data of the fluid 1 flowing in the molten bath model 22 of the glass melting furnace model 20, for example, temperature, temperature distribution, heat transfer rate and flow are well known temperature sensor, infrared sensor, pressure sensor, speed It measures by measuring means, such as a sensor. The simulation data is numerically interpreted using a computer program, and the analyzed data is reflected in the design and construction of the glass melting furnace or used in the process.

The above embodiments are merely illustrative of preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and various modifications may be made by those skilled in the art within the spirit and scope of the present invention. Modifications, variations, or substitutions may be made, and such embodiments are to be understood as being within the scope of the present invention.

As described above, according to the simulation apparatus for the glass melting furnace according to the present invention, the fluid flow by accurately and simply controlling the voltage applied to the heaters for heating the fluid for the analysis of the thermal flow field in the simulation of the glass melting furnace By precisely reproducing the, the reliability and reproducibility of the data obtained by the simulation can be greatly improved.

Claims (1)

In the glass melting furnace model in which the molten bath model and the clarification tank model are connected by the throat model to allow the flow of the fluid, A plurality of heaters installed to heat the fluid flowing in the melting furnace model of the glass melting furnace model for each region; A voltage controller controlling a voltage applied to each of the heaters; And a computer connected to the voltage controller and a digital / analog converter, the computer outputting a digital signal for controlling the voltage controller so as to control the driving of the heaters through the voltage controller.