A substrate glass production management control system

Abstract

The application provides a substrate glass production management control system, which comprises an electric melting furnace, a wind speed monitor and a controller. The electric melting furnace comprises a furnace body provided with an inlet, an outlet and an exhaust port, a heating device arranged in the furnace body and a gas injection lance connected with an air inlet pipeline. The wind speed monitor is arranged at the exhaust port and used for monitoring the wind speed at the exhaust port. The controller is used for acquiring the monitoring data of the wind speed monitor and controlling the air inlet amount of the gas injection lance to decrease and the output power of the heating device to increase when the wind speed is greater than a preset upper threshold. The output power of the heating device is increased to compensate for the decrease of the heat caused by the decrease of the air inlet amount of the gas injection lance, so that the stability of the furnace temperature is ensured, the stability of the furnace pressure is ensured by decreasing the input amount of the gas in the furnace, and the glass powder can be smelted in a relatively stable and controllable environment, so that the quality of the finished product meets the requirements.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal glass manufacturing technology, and more specifically to a substrate glass production management and control system. Background Technology

[0002] Melting is a crucial step in the production of substrate glass, directly affecting the quality and performance of the final product. Substrate glass, especially that used in TFT-LCDs (Thin Film Transistor Liquid Crystal Displays), needs to possess excellent properties such as high light transmittance, high flatness, and low impurity content.

[0003] Currently, the melting of substrate glass raw materials (glass powder) is generally carried out using electric furnaces with an electric-electric hybrid heating strategy. These electric furnaces use full oxygen combustion heating technology at the top and heating devices (multiple pairs of electrodes) at the bottom to ensure that the glass powder is fully and completely melted.

[0004] In the initial stage when glass powder enters the furnace, it primarily relies on the thermal radiation from the flame ejected by the lance for preliminary melting. However, the temperature at this stage is often insufficient to completely melt the glass powder, resulting in a semi-molten state between solid and liquid, forming clumps of varying sizes. With continuous heating from the heating device (electrodes) and the lance, these clumps gradually melt, forming molten glass that continues to flow. During this process, strict control of the melting temperature and time is crucial; excessively high temperatures or prolonged melting times can alter the glass composition, affecting the performance of the final product. Therefore, advanced melting technologies and equipment are required in the manufacture of substrate glass to ensure the stability and controllability of the furnace environment. Summary of the Invention

[0005] In order to solve the technical problems existing in the background art, the present invention proposes a substrate glass production management and control system.

[0006] The present invention proposes a substrate glass production management and control system, comprising: an electric melting furnace, a wind speed monitor, and a controller;

[0007] The electric melting furnace includes a furnace body with a feed inlet, a discharge outlet and an exhaust outlet, a heating device installed inside the furnace body to heat the material pile inside the furnace, and a gas torch connected to the gas inlet pipe and injecting flames into the furnace.

[0008] A wind speed monitor is installed at the exhaust outlet to monitor the wind speed at the exhaust outlet.

[0009] The controller is used to acquire monitoring data from the wind speed monitor, and when the wind speed is greater than the preset upper limit threshold, it controls the intake air volume of the gas spray gun to decrease, while simultaneously controlling the output power of the heating device to increase.

[0010] Preferably, when the wind speed is less than a preset lower threshold, the controller increases the intake air volume of the gas spray gun and decreases the output power of the heating device.

[0011] Preferably, the system also includes a furnace pressure monitor, which monitors the furnace pressure of the electric melting furnace. When the exhaust velocity is greater than the upper limit threshold or less than the lower limit threshold, the controller acquires the monitoring data from the furnace pressure monitor. When the furnace pressure exceeds a preset range, the controller controls the air intake of the gas injector and the output power of the heating device based on the acquired air velocity monitor data. When the furnace pressure is within the preset range, the controller ignores the current air velocity monitor data and does not adjust the air intake of the gas injector or the output power of the heating device.

[0012] Preferably, the interior of the furnace body is divided into multiple monitoring zones, and each monitoring zone is equipped with at least one corresponding furnace pressure monitor. When the wind speed at the exhaust port is greater than the upper limit threshold or less than the lower limit threshold, the controller acquires the monitoring data of each furnace pressure monitor and calculates the average value of the furnace pressure to determine whether the furnace pressure value is within the preset range based on the calculated average value.

[0013] Preferably, it also includes a first early warning device, which is activated and issues an early warning when the furnace pressure detected by the furnace pressure monitor is greater than the preset furnace pressure warning value.

[0014] Preferably, it also includes a second warning device, which is activated and issues a warning when the wind speed detected by the wind speed monitor is greater than the preset wind speed warning value.

[0015] In this invention, a wind speed monitor is installed at the exhaust port to monitor the wind speed at the exhaust port. The controller controls the air intake of the gas torch and the output power of the heating device based on the wind speed at the exhaust port. When the wind speed exceeds a preset upper limit threshold, the air intake of the gas torch is reduced, while the output power of the heating device is increased. This compensates for the reduced heat output caused by the reduced air intake of the gas torch, thereby ensuring a relatively stable furnace temperature and stable furnace pressure by reducing the gas input. This allows the glass powder to be melted in a relatively stable and controllable environment, ensuring that the finished product meets the required quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electric melting furnace in a substrate glass production management and control system proposed in this invention;

[0017] Figure 2 This is a schematic diagram of the structure of a substrate glass production management and control system proposed in this invention. Detailed Implementation

[0018] Reference Figure 1-2 The present invention proposes a substrate glass production management and control system, comprising: an electric melting furnace 1, a wind speed monitor 2, and a controller 3;

[0019] The electric melting furnace 1 includes a furnace body with a feed inlet, a discharge outlet and an exhaust outlet, a heating device installed inside the furnace body to heat the material pile inside the furnace, and a gas torch connected to the gas inlet pipe and spraying flames into the furnace. During operation, combustion-supporting gas is supplied to the gas torch through the gas inlet pipe.

[0020] An air velocity monitor 2 is installed at the exhaust port to monitor the air velocity at the exhaust port. A controller 3 acquires the monitoring data from the air velocity monitor 2 and, when the air velocity exceeds a preset upper limit threshold, controls the intake air volume of the gas torch to decrease. Simultaneously, it controls the output power of the heating device to increase. By increasing the output power of the heating device, it compensates for the reduced heat output of the gas torch due to the decreased air intake, thereby minimizing temperature fluctuations within the furnace. This ensures relatively stable furnace temperature while maintaining stable furnace pressure by reducing the gas input, allowing the glass powder to be melted in a relatively stable and controllable environment, ensuring the finished product meets quality requirements.

[0021] Conversely, when the wind speed is less than the preset lower threshold, the controller 3 controls the gas injection gun to increase the air intake and controls the heating device to decrease the output power. By reducing the output power of the heating device, the furnace temperature is prevented from rising rapidly due to the increased air intake of the gas injection gun. This ensures that the furnace temperature remains relatively stable while maintaining the furnace pressure by increasing the gas input.

[0022] Furthermore, the substrate glass production management and control system proposed in this invention also includes a furnace pressure monitor 4. The furnace pressure monitor 4 is used to monitor the furnace pressure of the electric melting furnace 1. When the wind speed at the exhaust port is greater than the upper limit threshold or less than the lower limit threshold, the controller 3 acquires the monitoring data of the furnace pressure monitor 4. When the furnace pressure exceeds the preset range, the controller controls the air intake of the gas lance and the output power of the heating device according to the acquired monitoring data of the wind speed monitor 2. When the furnace pressure is within the preset range, the current monitoring data of the wind speed monitor 2 is ignored, and the air intake of the gas lance and the output power of the heating device are not adjusted.

[0023] Furthermore, the furnace body is divided into multiple monitoring zones, and each monitoring zone is equipped with at least one corresponding furnace pressure monitor 4. When the exhaust velocity is greater than the upper limit threshold or less than the lower limit threshold, the controller 3 acquires the monitoring data of each furnace pressure monitor 4, calculates the average value of the furnace pressure based on the acquired monitoring data, and judges whether the furnace pressure value is within the preset range based on the calculated average value. This makes the judgment more realistic in reflecting the actual furnace pressure.

[0024] Furthermore, the substrate glass production management and control system proposed in this invention also includes a first early warning device and a second early warning device. When the wind speed detected by the wind speed monitor 2 exceeds a preset wind speed warning value, the first early warning device is activated and issues an early warning; when the furnace pressure detected by the furnace pressure monitor 4 exceeds a preset furnace pressure warning value, the second early warning device is activated and issues an early warning. This is to remind operators to pay attention and check, analyze relevant problems in a timely manner, take corresponding measures, further improve work efficiency, and reduce losses.

[0025] In this embodiment, the air inlet and air outlet are located at the ends of both ends of the furnace body, and the heating device includes several heating electrodes arranged with the air inlet facing the air outlet.

[0026] As can be seen from the above, this invention, by installing a wind speed monitor 2 at the exhaust port, monitors the wind speed at the exhaust port. The controller 3 controls the air intake of the gas torch and the output power of the heating device based on the wind speed at the exhaust port. When the wind speed exceeds a preset upper threshold, the air intake of the gas torch is reduced, while the output power of the heating device is increased. This compensates for the reduced heat output caused by the reduced air intake, thus maintaining the furnace temperature while reducing the gas input and ensuring stable furnace pressure. This allows the glass powder to be melted in a relatively stable and controllable environment, ensuring the finished product meets quality requirements. Conversely, when the wind speed is below a preset lower threshold, the controller 3 increases the air intake of the gas torch and decreases the output power of the heating device. By reducing the output power, the rapid temperature rise in the furnace due to the increased air intake prevents the furnace temperature from rising rapidly. This ensures relatively stable furnace temperature while maintaining stable furnace pressure by increasing the gas input. It can also issue an early warning when the pressure inside the furnace or the wind speed at the exhaust vent exceeds the warning value, so as to remind operators to pay attention and check, analyze relevant problems in a timely manner, take corresponding measures, further improve work efficiency, and reduce losses.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A substrate glass production management and control system, characterized in that, The application relates to an electric smelting furnace, a wind speed monitor and a controller. The electric smelting furnace (1) comprises a furnace body with a feeding port, a discharging port and an exhaust port, a heating device arranged in the furnace body to heat a material pile in the furnace, and a gas injection lance connected with an air inlet pipeline and injecting a flame into the furnace. The wind speed monitor (2) is arranged at the exhaust port to monitor the wind speed at the exhaust port. The controller (3) is used for acquiring the monitoring data of the wind speed monitor (2) and controlling the air inlet amount of the gas injection lance to decrease and the output power of the heating device to increase when the wind speed is greater than a preset upper limit threshold value. The controller (3) is used for controlling the air inlet amount of the gas injection lance to increase and the output power of the heating device to decrease when the wind speed is less than a preset lower limit threshold value.

2. The system for managing and controlling production of a substrate glass according to claim 1, wherein The application further comprises a furnace pressure monitor (4) used for monitoring the furnace pressure of the electric smelting furnace (1), and when the wind speed at the exhaust port is greater than the upper limit threshold value or less than the lower limit threshold value, the controller (3) acquires the monitoring data of the furnace pressure monitor (4) and controls the air inlet amount of the gas injection lance and the output power of the heating device according to the acquired monitoring data of the wind speed monitor (2) when the furnace pressure exceeds a preset range value; when the furnace pressure is within the preset range value, the monitoring data of the current wind speed monitor (2) is ignored, and the air inlet amount of the gas injection lance and the output power of the heating device are not adjusted.

3. The system for managing and controlling production of a substrate glass according to claim 1, wherein The inside of the furnace body is divided into multiple monitoring areas, and at least one furnace pressure monitor (4) corresponding to each monitoring area is arranged in each monitoring area; when the wind speed at the exhaust port is greater than the upper limit threshold value or less than the lower limit threshold value, the controller (3) respectively acquires the monitoring data of the furnace pressure monitors (4) and calculates the average value of the furnace pressure to determine whether the furnace pressure value is within the preset range value according to the calculated average value.

4. The system for managing and controlling production of a substrate glass according to claim 3, wherein The application further comprises a first early warning device which is started to give a warning when the furnace pressure monitored by the furnace pressure monitor (4) is greater than a preset furnace pressure warning value.

5. The system for managing and controlling production of a substrate glass according to claim 3, wherein The application further comprises a second early warning device which is started to give a warning when the wind speed monitored by the wind speed monitor (2) is greater than a preset wind speed warning value.

6. The system for managing and controlling production of a substrate glass according to any one of claims 1 to 5, characterized in that, ​

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