Circulating cooling system for flange heaters in glass platinum channels

Abstract

This invention discloses a circulating cooling system for a flange heater in a glass platinum channel. Using a plate heat exchanger as its core, it constructs a dual-circulation heat exchange architecture for cooling water and process water. Through the coordinated action of the control unit, temperature monitoring gauge, and flow valve, the cooling water flow rate can be dynamically adjusted in real time according to the process water temperature before heat exchange, achieving precise control of the process water temperature after heat exchange. This system can adapt to cooling requirements under different operating conditions, realizing automation, intelligence, and high reliability of the cooling process. It effectively prevents flange overheating, ensuring stable operation of the glass platinum channel and the quality of the molten glass. Furthermore, both the cooling water and process water circulation units employ a dual-redundant configuration with one operating and one backup, equipped with pressure gauges, flow meters, and automatic reversing valves. The control unit can monitor the pipeline status in real time and automatically switch to the backup pipeline when abnormal pressure or flow is detected, ensuring uninterrupted cooling and greatly improving the system's operational reliability and safety.

Description

Technical Field

[0001] This invention belongs to the field of substrate glass manufacturing technology, and relates to the cooling of flange heaters in glass platinum channels during substrate glass production, specifically a circulating cooling system for flange heaters in glass platinum channels. Background Technology

[0002] In the production of LCD substrate glass, the glass raw material is melted in a pure oxygen combustion electric furnace and then enters a high-temperature platinum channel. This channel is equipped with heating, refining, stirring and homogenizing, and cooling sections. The molten glass must pass through these sections sequentially to complete processes such as internal structure stabilization, bubble removal, and composition homogenization. To ensure temperature stability of the molten glass during transport, each section is equipped with a flange-type direct heater and a water-cooled jacket structure. Softened water is continuously introduced to cool the flange area of ​​the heater, thereby ensuring long-term reliable operation of the heater.

[0003] In existing technologies, process water cooling systems often suffer from large temperature fluctuations, unstable flow rates, and insufficient system reliability, which can easily lead to overheating and damage to heater flanges, affecting the quality of molten glass and continuous production. Some improvements have been made, such as using pressure gauges, flow meters, and solenoid valves to switch between water-cooled and air-cooled pipelines. However, these solutions primarily focus on switching the type of cooling medium and still fall short in providing refined control and redundancy for a single water-cooled system. Furthermore, existing systems need improvement in areas such as heat exchange efficiency optimization, water quality assurance, and fault warning. Summary of the Invention

[0004] To address the technical problems existing in the background art, this invention proposes a circulating cooling system for a flange heater in a glass platinum channel. By constructing a closed-loop controlled dual-circulation heat exchange architecture for cooling water and process water, efficient and precise cooling of the heater flange is achieved, meeting the high-precision requirements for temperature and flow rate in substrate glass production, and ensuring the long-term reliable operation of the platinum channel flange heater.

[0005] The objective of this invention can be achieved through the following technical solutions: The circulating cooling system for the flange heater in the glass platinum channel includes: a cooling water circulation unit, a process water circulation unit, a plate heat exchanger, and a control unit. The cooling water circulation unit is connected to a cooling water source to provide circulating cooling water as the system's cold source. The process water circulation unit is connected to the heater and cools the heater flange area through circulating process water. The plate heat exchanger is connected to both the cooling water circulation unit and the process water circulation unit to exchange heat between the cooling water in the cooling water circulation unit and the process water in the process water circulation unit. The process water circulation unit is equipped with a temperature sensor, and the cooling water circulation unit is equipped with a flow valve. The control unit is electrically connected to the flow valve and the temperature sensor, respectively. Based on the temperature of the process water before heat exchange detected by the temperature sensor, the flow valve is controlled to dynamically adjust the flow rate of the cooling water in the cooling water circulation unit, thereby achieving precise control of the process water temperature after heat exchange.

[0006] Furthermore, the cooling water circulation unit includes: an inlet pipe and a drain pipe. One end of the inlet pipe is connected to the cooling water source, and the other end is connected to the cooling water inlet of the plate heat exchanger. One end of the drain pipe is connected to the cooling water outlet of the plate heat exchanger, and the other end has a drain outlet. A flow valve is installed on the inlet pipe.

[0007] Furthermore, the cooling water circulation unit also includes a Y-type filter, which is installed on the inlet pipe to intercept impurities in the cooling water.

[0008] Furthermore, the process water circulation unit includes: a water-cooled jacket structure, an outlet pipe, and a circulation pipe. The water-cooled jacket structure is installed at the heater flange. One end of the outlet pipe is connected to the process water outlet of the plate heat exchanger, and the other end is connected to the inlet of the water-cooled jacket structure. One end of the circulation pipe is connected to the outlet of the water-cooled jacket structure, and the other end is connected to the process water inlet of the plate heat exchanger. A temperature sensor is installed on the circulation pipe.

[0009] Furthermore, the control unit uses a preset control algorithm model to calculate the cooling water flow rate required to cool to the target temperature based on the process water temperature before heat exchange, and adjusts the cooling water flow rate by adjusting the opening of the flow valve.

[0010] Furthermore, a temperature comparison meter is installed on the outlet pipe of the process water circulation unit. The control unit is electrically connected to the temperature comparison meter so as to dynamically correct the calculation parameters of the preset control algorithm model based on the actual temperature of the process water after heat exchange detected by the temperature comparison meter.

[0011] Furthermore, the process water circulation unit also includes: a filter cartridge and a differential pressure gauge. The filter cartridge is installed on the circulation pipe, and the differential pressure gauge is connected in parallel at both ends of the filter cartridge to monitor the differential pressure value between the inlet and outlet of the filter cartridge. The differential pressure gauge is electrically connected to the control unit. The control unit can determine the degree of blockage of the filter cartridge based on the differential pressure value fed back by the differential pressure gauge, and issue a warning signal for filter cleaning or replacement when the differential pressure value exceeds a preset threshold.

[0012] Furthermore, both the cooling water circulation unit and the process water circulation unit adopt a multi-path redundancy configuration with one for use and multiple for backup. The inlet and outlet pipes of the cooling water circulation unit are set as multiple sets of parallel pipes with the same structure, and the outlet and circulation pipes of the process water circulation unit are set as multiple sets of parallel pipes with the same structure.

[0013] Furthermore, a reversing valve is installed between multiple sets of inlet pipes, multiple sets of drain pipes, multiple sets of outlet pipes, and multiple sets of circulation pipes to enable switching between the main pipeline and the backup pipeline.

[0014] Furthermore, flow meters and pressure gauges are installed on the inlet pipe, drain pipe, outlet pipe, and circulation pipe. The flow meters, pressure gauges, and reversing valves are all electrically connected to the control unit. The control unit determines whether each main pipeline is abnormal based on the pipeline pressure and flow values ​​fed back by the pressure gauge and flow meter, and controls the corresponding reversing valve to switch to the backup pipeline when any main pipeline experiences pressure or flow abnormality.

[0015] The beneficial effects of this invention are as follows: This invention provides a circulating cooling system for a flange heater in a glass platinum channel. Using a plate heat exchanger as the core, it constructs a dual-circulation heat exchange architecture for cooling water and process water. Through the coordinated action of the control unit, temperature monitoring gauge, and flow valve, the cooling water flow rate can be dynamically adjusted in real time according to the process water temperature before heat exchange, achieving precise control of the process water temperature after heat exchange. This system can adapt to cooling requirements under different operating conditions, realizing automation, intelligence, and high reliability of the cooling process. It effectively prevents flange overheating, ensuring the stable operation of the glass platinum channel and the quality of the molten glass. Furthermore, both the cooling water and process water circulation units employ a dual-circuit redundant configuration (one in use, one in standby), equipped with pressure gauges, flow meters, and automatic reversing valves. The control unit can monitor the pipeline status in real time and automatically switch to the standby pipeline when abnormal pressure or flow is detected, ensuring uninterrupted cooling. This greatly improves the system's operational reliability and safety, demonstrating significant practical value and promising prospects for wider application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the system of the present invention.

[0017] Figure 2 This is a front structural diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the rear structure of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-3As shown, this invention provides a circulating cooling system for a flange heater in a glass platinum channel, comprising: a cooling water circulation unit 1, a process water circulation unit 2, a plate heat exchanger 3, and a control unit 4. The cooling water circulation unit 1 is connected to a cooling water source to circulate cooling water as the system's cold source. The process water circulation unit 2 is connected to the heater and cools the heater flange area using circulating process water, wherein the process water is softened water.

[0021] The plate heat exchanger 3 is connected to the cooling water circulation unit 1 and the process water circulation unit 2 respectively, so that the cooling water provided by the cooling water circulation unit 1 and the process water circulating in the process water circulation unit 2 can exchange heat, reduce the temperature of the process water to the target temperature, and then send it into the glass platinum channel to cool the heater.

[0022] Specifically, the cooling water circulation unit 1 includes: an inlet pipe 11 and a drain pipe 12. One end of the inlet pipe 11 is connected to a cooling water source, and the other end is connected to the cooling water inlet of the plate heat exchanger 3 to introduce cold water at 0℃-10℃ into the plate heat exchanger 3. One end of the drain pipe 12 is connected to the cooling water outlet of the plate heat exchanger 3, and the other end has a drain outlet to discharge the warm water at 20℃-30℃ obtained after heat exchange and recycle it. Thus, while cooling the heater, the cold water can be heated simultaneously, saving energy.

[0023] The process water circulation unit 2 includes: a water-cooled jacket structure 21, an outlet pipe 22, and a circulation pipe 23. The water-cooled jacket structure 21 is installed at the heater flange. One end of the outlet pipe 22 is connected to the process water outlet of the plate heat exchanger 3, and the other end is connected to the inlet of the water-cooled jacket structure 21, so as to send the process cold water, which has been cooled to 20℃-30℃ after heat exchange, into the water-cooled jacket structure 21 to cool the heater flange. One end of the circulation pipe 23 is connected to the outlet of the water-cooled jacket structure 21, and the other end is connected to the process water inlet of the plate heat exchanger 3, so as to circulate the process hot water at 40℃-60℃ in the water-cooled jacket structure 21 back into the plate heat exchanger 3 for cooling.

[0024] Plate heat exchanger 3 is the core heat exchange component, employing a detachable structure. It mainly comprises end plates, clamping bolts, multiple corrugated plate assemblies, and sealing gaskets. Multiple corrugated plates are stacked and assembled using sealing gaskets, forming a complex flow channel network. After assembly, adjacent flow channels allow for the flow of heat media (process hot water) and cold media (cold water) at different temperatures, eliminating heat exchange dead zones. The unique corrugated structure of the plates not only enhances mechanical pressure resistance but also effectively agitates the fluid, disrupts the boundary layer, and achieves an extremely high heat transfer coefficient, thus achieving the process requirement of 20℃-30℃ cooling within a compact space.

[0025] Cooling water circulation unit 1 is equipped with a flow valve 13, which is installed on the inlet pipe 11. Process water circulation unit 2 is equipped with a temperature sensor 24, which is installed on the circulation pipe 23. Control unit 4 is electrically connected to the flow valve 13 and the temperature sensor 24 respectively. Based on the temperature of the process water before heat exchange detected by the temperature sensor 24, control flow valve 13 is used to dynamically adjust the cooling water flow rate in cooling water circulation unit 1, thereby achieving precise control of the process water temperature after heat exchange.

[0026] Specifically, control unit 4 employs a preset control algorithm model to calculate the required cooling water flow rate to cool to the target temperature based on the process water temperature before heat exchange, and adjusts the cooling water flow rate by regulating the opening of flow valve 13. The preset control algorithm model is as follows: ; in, The flow rate of process water in process water circulation unit 2 is a fixed value; The temperature of the cooling water supplied to the cooling water source is a fixed value; The preset target temperature; Temperature sensor 24 detected the temperature value of the process water before heat exchange; The required flow rate of cooling water to cool the process water to the target temperature; The error compensation coefficient can be obtained through multiple experiments; This is the ratio of the specific heat capacity of process water to that of cooling water. Specifically, , The specific heat capacity of the cooling water in cooling water circulation unit 1. The specific heat capacity of the process water in process water circulation unit 2.

[0027] Preferably, a temperature comparison table 25 is installed on the outlet pipe 22 of the process water circulation unit 2, and the control unit 4 is electrically connected to the temperature comparison table 27 to detect the actual temperature of the process water after heat exchange according to the temperature comparison table 25. Dynamically correct the calculation parameters of the preset control algorithm model .

[0028] Preferably, the cooling water circulation unit 1 further includes a Y-type filter 14, which is installed on the inlet pipe 11 to intercept impurities in the cooling water. The process water circulation unit 2 further includes a filter cartridge 26 and a differential pressure gauge 27. The filter cartridge 26 is installed on the circulation pipe 23, and the differential pressure gauge 27 is connected in parallel at both ends of the filter cartridge 26 to monitor the differential pressure value between the inlet and outlet of the filter cartridge 26. The differential pressure gauge 27 is electrically connected to the control unit 4. The control unit 4 can determine the degree of blockage of the filter cartridge 26 based on the differential pressure value fed back by the differential pressure gauge 27, and issue a warning signal for filter cleaning or replacement when the differential pressure value exceeds a preset threshold.

[0029] Both the cooling water circulation unit 1 and the process water circulation unit 2 adopt a dual-redundant configuration with one in use and one as a backup. The inlet pipe 11 and outlet pipe 12 of the cooling water circulation unit 1 are both set as two sets of parallel pipes with the same structure, one set as the main pipeline and the other set as the backup pipeline. Similarly, the outlet pipe 22 and circulation pipe 23 of the process water circulation unit 2 are both set as two sets of parallel pipes with the same structure, one set as the main pipeline and the other set as the backup pipeline.

[0030] A first reversing valve 51 is installed at the location where the two sets of inlet pipes 11 are connected in parallel to switch between the main inlet pipe 11 and the standby pipe. A second reversing valve 52 is installed at the location where the two sets of drain pipes 12 are connected in parallel to switch between the main drain pipe 12 and the standby pipe. A third reversing valve 53 is installed at the location where the two sets of outlet pipes 22 are connected in parallel to switch between the main outlet pipe 22 and the standby pipe. A fourth reversing valve 54 is installed at the location where the two sets of circulation pipes 23 are connected in parallel to switch between the main circulation pipe 23 and the standby pipe.

[0031] Flow meters and pressure gauges are installed on the inlet pipe 11, drain pipe 12, outlet pipe 22, and circulation pipe 23. The flow meters, pressure gauges, and each reversing valve are electrically connected to the control unit 4. The control unit 4 determines whether each main pipeline is abnormal based on the pipeline pressure and flow values ​​fed back by the pressure gauge and flow meter, and controls the corresponding reversing valve to switch to the backup pipeline when any main pipeline has an abnormal pressure or flow.

[0032] Specifically, when the pipeline pressure value detected by the pressure gauge is continuously lower than the first pressure threshold (e.g., 1.5 kgf / cm²) or higher than the second pressure threshold (e.g., 3.5 kgf / cm²), or the pipeline flow value detected by the flow meter is continuously lower than the first flow threshold (e.g., 20 m³ / h), the control unit 4 determines that the pipeline is abnormal, immediately enters the fault switching mode, controls the corresponding reversing valve to switch to the parallel backup pipeline, records the fault information, and issues an alarm signal.

[0033] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A circulating cooling system for a flange heater in a glass platinum channel, characterized in that, include: The cooling water circulation unit (1), the process water circulation unit (2), the plate heat exchanger (3), and the control unit (4) are connected to the cooling water source to provide cooling water as the system's cold source. The process water circulation unit (2) is connected to the heater and cools the heater flange by circulating process water. The plate heat exchanger (3) is connected to the cooling water circulation unit (1) and the process water circulation unit (2) respectively so that the cooling water of the cooling water circulation unit (1) and the process water circulation unit (2) can exchange heat. The process water circulation unit (2) is equipped with a temperature sensor (24), and the cooling water circulation unit (1) is equipped with a flow valve (13). The control unit (4) is electrically connected to the flow valve (13) and the temperature sensor (24) respectively. The temperature sensor (24) can detect the process water temperature before heat exchange, and control the flow valve (13) to dynamically adjust the cooling water flow in the cooling water circulation unit (1), thereby achieving precise control of the process water temperature after heat exchange.

2. The circulating cooling system according to claim 1, characterized in that, The cooling water circulation unit (1) includes: an inlet pipe (11) and a drain pipe (12). One end of the inlet pipe (11) is connected to the cooling water source, and the other end is connected to the cooling water inlet of the plate heat exchanger (3). One end of the drain pipe (12) is connected to the cooling water outlet of the plate heat exchanger (3), and the other end has a drain outlet. A flow valve (13) is installed on the inlet pipe (11).

3. The circulating cooling system according to claim 2, characterized in that, The cooling water circulation unit (1) also includes a Y-type filter (14), which is installed on the inlet pipe (11) to intercept impurities in the cooling water.

4. The circulating cooling system according to claim 3, characterized in that, The process water circulation unit (2) includes: a water-cooled jacket structure (21), an outlet pipe (22), and a circulation pipe (23). The water-cooled jacket structure (21) is installed at the heater flange. One end of the outlet pipe (22) is connected to the process water outlet of the plate heat exchanger (3), and the other end is connected to the inlet of the water-cooled jacket structure (21). One end of the circulation pipe (23) is connected to the outlet of the water-cooled jacket structure (21), and the other end is connected to the process water inlet of the plate heat exchanger (3). A temperature sensor (24) is installed on the circulation pipe (23).

5. The circulating cooling system according to claim 4, characterized in that, The control unit (4) adopts a preset control algorithm model, calculates the cooling water flow rate required to cool to the target temperature based on the process water temperature before heat exchange, and adjusts the cooling water flow rate by adjusting the opening of the flow valve (13).

6. The circulating cooling system according to claim 5, characterized in that, A temperature comparison table (25) is installed on the outlet pipe (22) of the process water circulation unit (2). The control unit (4) is electrically connected to the temperature comparison table (25) to detect the actual temperature of the process water after heat exchange based on the temperature comparison table (25) and dynamically correct the calculation parameters of the preset control algorithm model.

7. The circulating cooling system according to claim 6, characterized in that, The process water circulation unit (2) also includes: filter cartridge (26) and differential pressure gauge (27). The filter cartridge (26) is installed on the circulation pipe (23). The differential pressure gauge (27) is connected in parallel at both ends of the filter cartridge (25) to monitor the differential pressure value at the inlet and outlet of the filter cartridge (26). The differential pressure gauge (27) is electrically connected to the control unit (4). The control unit (4) can determine the degree of blockage of the filter cartridge (26) based on the differential pressure value fed back by the differential pressure gauge (27), and issue a warning signal for filter cleaning or replacement when the differential pressure value exceeds the preset threshold.

8. The circulating cooling system according to claim 7, characterized in that, Both the cooling water circulation unit (1) and the process water circulation unit (2) adopt a multi-path redundancy configuration with one for use and multiple backups. The inlet pipe (11) and outlet pipe (12) of the cooling water circulation unit (1) are set as multiple sets of parallel pipes with the same structure. The outlet pipe (22) and circulation pipe (23) of the process water circulation unit (2) are set as multiple sets of parallel pipes with the same structure.

9. The circulating cooling system according to claim 8, characterized in that, A reversing valve is installed between multiple sets of inlet pipes (11), multiple sets of drain pipes (12), multiple sets of outlet pipes (22), and multiple sets of circulation pipes (23) to realize the switching between the main pipeline and the backup pipeline.

10. The circulating cooling system according to claim 9, characterized in that, A flow meter and a pressure gauge are installed on the inlet pipe (11), the drain pipe (12), the outlet pipe (22), and the circulation pipe (23). The flow meter, the pressure gauge, and the reversing valve are all electrically connected to the control unit (4). The control unit (4) determines whether each main pipeline currently in operation is abnormal based on the pipeline pressure and flow values ​​fed back by the pressure gauge and the flow meter, and controls the corresponding reversing valve to switch to the standby pipeline when any main pipeline has an abnormal pressure or flow.

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