A glass-melting furnace defoaming agent automatic feeding system

Abstract

The utility model provides a kind of glass melting furnace defoaming agent automatic feeding system, it is related to glass melting equipment technical field, including pressure pipeline system, spray gun system and control system;The pressure pipeline system, including at least one for storing defoaming agent liquid storage tank, for pressurizing the compressed air source to the storage tank, and from the storage tank extends to the delivery pipeline of kiln;The spray gun system, including at least one installation in kiln wall defoaming agent spray gun, the spray gun system is connected with pressure pipeline system by the delivery pipeline;The control system is used to receive the commutation signal sent by glass melting furnace main DCS system, and control commutation valve switches the delivery direction of defoaming agent liquid, to defoaming agent liquid is delivered to defoaming agent spray gun in one side of melting furnace;The application provides a kind of glass melting furnace defoaming agent automatic feeding system with high degree of automation, control precision, safe and reliable and can significantly reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of glass melting equipment technology, specifically to an automatic defoaming agent dispensing system for glass melting furnaces. Background Technology

[0002] In the production of high-quality glass such as photovoltaic glass, glass melting is a crucial step that determines the quality of the final product. This process requires heating the batch material at high temperatures in a furnace to melt and clarify it into a homogeneous molten glass. During the clarification stage, eliminating air bubbles in the molten glass is essential. Traditionally, clarifying agents such as sodium pyroantimonate are added to the batch material; however, these materials are expensive and their supply is limited, significantly increasing production costs.

[0003] As an alternative, directly spraying liquid defoamers onto the surface of molten glass has become a newer and more cost-effective process. However, existing defoamer application methods mostly rely on manual or semi-automatic operation, which presents several problems: 1. Inaccurate dosing: It is difficult to accurately control the flow rate of defoamer, which can easily lead to waste or poor results.

[0004] 2. Poor synchronization: For reversing kilns, it is difficult to synchronize the direction of defoamer application with the direction of flame burning in real time, which affects the defoaming efficiency.

[0005] 3. Low level of automation: It cannot achieve remote centralized monitoring and management, and relies on manual on-site inspection and operation, resulting in high labor costs and slow response speed. Utility Model Content

[0006] To overcome the problems in the background art, this utility model provides an automatic defoamer dosing system for glass melting furnaces that is highly automated, precisely controlled, safe and reliable, and can significantly reduce production costs.

[0007] An automatic defoamer dispensing system for a glass melting furnace includes a pressure pipeline system, a spray gun system, and a control system. The pressure pipeline system includes at least one storage tank for storing liquid defoamer, a compressed air source for pressurizing the storage tank, and a delivery pipeline extending from the storage tank to the furnace. A flow meter, a flow regulating valve, and a reversing valve are sequentially installed on the delivery pipeline. The spray gun system includes at least one defoamer spray gun installed on the furnace wall, and the spray gun system is connected to the pressure pipeline system via the delivery pipeline. The defoamer spray gun has a defoamer inlet, a cooling water circulation loop, and a compressed air inlet for atomizing the defoamer. The control system is electrically connected to the flow meter, the flow regulating valve, and the reversing valve. The control system receives a reversing signal from the main DCS system of the glass melting furnace and automatically controls the reversing valve to switch directions based on the signal. Simultaneously, it adjusts the opening of the flow regulating valve based on feedback signals from the flow meter to precisely control the defoamer dispensing flow rate.

[0008] Furthermore, the spray gun system includes two defoamer spray guns located on both sides of the melting furnace, and the reversing valve is used to switch the delivery direction of the defoamer liquid so as to deliver the defoamer liquid to the defoamer spray gun on one side.

[0009] Furthermore, the structure of the defoamer spray gun includes a centrally located defoamer tube, a cooling water jacket that wraps around the defoamer tube and forms a sealed cavity, and an atomizing nozzle located at the outlet of the defoamer tube; the defoamer inlet is connected to the defoamer tube, the cooling water circulation loop includes an inlet and an outlet connected to the cooling water jacket, and the compressed air inlet is connected to the atomizing nozzle to guide the compressed air to the liquid sprayed from the defoamer tube to achieve atomization.

[0010] Furthermore, the compressed air source in the pressure pipeline system is connected to the top of the storage tank via an independent pressure regulating valve to pressurize the storage tank to a preset pressure value.

[0011] Furthermore, the control system is deeply integrated with the main DCS system of the glass melting furnace, enabling remote monitoring and setting of the flow rate of the flow meter, the valve position of the flow regulating valve, and the liquid level and pressure inside the storage tank on the interface in the central control room.

[0012] Furthermore, the storage tank is also equipped with a pneumatic inlet valve and a pneumatic pressure relief valve, both of which are connected to the control system to enable remote tank switching or emergency pressure relief operations.

[0013] Furthermore, the pressure piping system includes two switchable storage tanks, each equipped with an independent pressure and level monitoring device and connected to the control system.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. Through integration with the DCS system and closed-loop regulation, precise synchronization with the furnace operation status and precise control of the defoamer dosage are achieved, reducing waste.

[0015] 2. The unique compressed air atomizing spray gun design allows the defoamer to react evenly and fully with the molten glass, accelerating the clarification process and helping to reduce the amount of traditional clarifying agents such as sodium pyroantimonate, directly reducing production costs.

[0016] 3. The water-cooling design of the spray gun ensures its long-term stable operation at high temperatures. The remote monitoring and operation functions keep staff away from high-temperature danger areas and enable a rapid response to emergencies such as remote cut-off and pressure relief. Attached Figure Description

[0017] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0018] Figure 1 This is a schematic diagram of the overall system structure of this utility model; Figure 2 This is a schematic diagram of the defoamer spray gun structure of this utility model.

[0019] Figure label: 1-Storage tank, 2-Compressed air source, 3-Flow meter, 4-Flow regulating valve, 5-Reversing valve, 6-Defoamer spray gun, 8-Main DCS system of glass melting furnace, 9-Defoamer pipe, 10-Cooling water jacket, 11-Atomizing nozzle, 12-Defoamer inlet, 13-Cooling water inlet, 14-Cooling water outlet, 15-Compressed air inlet. Detailed Implementation

[0020] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0021] See Figure 1 and Figure 2 This embodiment discloses an automatic defoamer dosing system for glass melting furnaces. The system mainly consists of a pressure pipeline system, a spray gun system, and a control system, wherein: The pressure pipeline system includes one or more defoamer storage tanks 1. The defoamer is pumped into the storage tank 1 by a water pump. The compressed air source 2 is connected to the top of the storage tank 1 through a pipeline to pressurize the tank. The pressure can be precisely controlled at 0.4-0.5MPa by an independent regulating valve to ensure that the defoamer can be stably extruded. The defoamer flows out from the bottom of the storage tank 1 and enters the delivery pipeline. The pipeline is sequentially equipped with a flow meter 3 for monitoring real-time flow, a flow regulating valve 4 for precisely controlling the flow, and a reversing valve 5 for switching the delivery direction. For reversing kilns, the outlet of the reversing valve 5 is divided into left and right paths, which lead to the defoamer spray guns 6 installed on both sides of the kiln, respectively.

[0022] Spray gun system reference Figure 2 The defoamer spray gun 6 is a key component of this system. Its main body consists of a central defoamer tube 9 and a cooling water jacket 10 on the outside, forming a closed cooling jacket. The gun body has three functional interfaces: a defoamer inlet 12, a cooling water inlet 13 and an outlet 14, and a compressed air inlet 15 for atomization. During operation, cooling water flows in from the inlet 13 and circulates in the cooling water jacket 10. After absorbing the high-temperature heat radiated from the kiln, it flows out from the outlet 14, effectively protecting the spray gun from burn-out. The defoamer liquid enters the defoamer tube 9 through the inlet 12. At the same time, another stream of compressed air enters from the inlet 15 and is guided to the atomizing nozzle 11 located at the outlet of the defoamer tube 9. When the defoamer liquid is sprayed out from the defoamer tube 9, it is strongly impacted, sheared and dispersed into fine droplets by the high-speed airflow, and evenly sprayed on the surface of the molten glass.

[0023] The control system is connected to the main DCS system 8 of the glass melting furnace via a signal cable. It can receive the reversing signal of the furnace. When the DCS system 8 issues a reversing command, such as when the flame switches from the left to the right side, the control system immediately issues a command to the reversing valve 5 to automatically switch the flow of the defoamer to the right spray gun 6, thus ensuring the consistency between the defoaming action point and the heating core area. Meanwhile, the control system receives real-time flow data from the flow meter 3. The operator can set a desired flow value on the central control room interface of the DCS system 8. The control system 7 will continuously adjust the opening of the flow regulating valve 4 by comparing the set value and the actual value and using control algorithms such as PID, so that the actual flow rate is accurately and stably stabilized at the set value.

[0024] Furthermore, by installing level gauges and pressure sensors on storage tank 1 and connecting them to the control system, operators can remotely monitor the tank status from the central control room, enabling low-level alarms, automatic replenishment, or remote switching to a backup tank. All related valves, such as the tank's air inlet valve and pressure relief valve, can be replaced with pneumatic regulating valves and connected to the DCS system 8, achieving comprehensive remote control and emergency handling, greatly improving the system's safety and automation level.

[0025] Through the high integration and collaborative operation of the above-mentioned structures, this utility model realizes automated, precise and intelligent management of the entire process of defoamer dosing in glass melting furnaces, providing strong technical support for cost reduction and efficiency improvement in glass production.

[0026] Work process: First, the defoamer liquid is pumped into storage tank 1 by a water pump. The operator remotely sets the required defoamer dosing flow rate and other process parameters through the interface of the main DCS system 8 in the central control room. After the system starts, the compressed air source 2 pressurizes the storage tank 1 to the set stable pressure, such as 0.4-0.5 MPa, and the system enters standby mode. When the glass melting furnace performs a reversing operation, the main DCS system 8 will capture the reversing signal and immediately transmit this signal synchronously to the control system of this system. Upon receiving the reversing signal, the control system immediately and automatically controls the reversing valve 5 to switch the defoamer delivery pipeline to the side that is consistent with the current firing direction of the furnace. Driven by high pressure, the defoamer liquid flows out from the storage tank 1 and passes through the flow meter 3. Based on the real-time feedback from the flow meter 3, the control system adjusts the opening of the flow regulating valve 4 through a closed loop to ensure that the output flow is consistent with the set value. The liquid then passes through the reversing valve 5 and is transported through a metal hose to the defoamer spray gun 6 on the kiln side. At the nozzle of the spray gun 6, another stream of compressed air forcefully disperses the defoamer liquid, forming an atomized state that is sprayed into the kiln. Throughout the entire process, circulating water is continuously supplied to the defoamer spray gun 6 for cooling to prevent it from burning at temperatures of over 1,000 degrees Celsius inside the kiln. Meanwhile, operators can monitor all critical information such as flow rate, valve position, tank pressure, and liquid level in real time from the central control room without needing to operate on-site.

[0027] With each subsequent reversal of the melting furnace, the system will repeat steps two and five, automatically switching to the other side for dispensing. In case of tank switching or emergencies, operators can remotely control the relevant valves to switch or depressurize, improving the speed and safety of emergency response.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic defoamer dispensing system for glass melting furnaces, characterized in that, This includes the pressure piping system, spray gun system, and control system; The pressure pipeline system includes at least one storage tank (1) for storing defoamer liquid, a compressed air source (2) for pressurizing the storage tank (1), and a conveying pipeline extending from the storage tank (1) to the kiln. A flow meter (3), a flow regulating valve (4), and a reversing valve (5) are sequentially installed on the conveying pipeline. The spray gun system includes at least one defoamer spray gun (6) installed on the kiln wall. The spray gun system is connected to the pressure pipeline system through the delivery pipeline. The defoamer spray gun (6) has a defoamer inlet (12), a cooling water circulation loop, and a compressed air inlet (15) for atomizing the defoamer. The control system is electrically connected to the flow meter (3), the flow regulating valve (4) and the reversing valve (5) to control the reversing valve (5) to reverse and to adjust the opening of the flow regulating valve (4) according to the feedback signal of the flow meter (3).

2. The automatic defoamer dispensing system for glass melting furnaces according to claim 1, characterized in that, The spray gun system includes two defoamer spray guns (6) located on both sides of the melting furnace. The reversing valve (5) is used to switch the delivery direction of the defoamer liquid so as to deliver the defoamer liquid to one of the defoamer spray guns (6).

3. The automatic defoamer dispensing system for glass melting furnaces according to claim 1, characterized in that, The defoamer spray gun (6) includes a centrally located defoamer tube (9), a cooling water jacket (10) located outside the defoamer tube (9) and forming a sealed cavity, and an atomizing nozzle (11) located at the outlet of the defoamer tube (9); the defoamer inlet (12) is connected to the defoamer tube (9), the cooling water circulation loop is connected to the inlet (13) and outlet (14) of the cooling water jacket (10), and the compressed air inlet (15) is connected to the atomizing nozzle (11).

4. The automatic defoamer dispensing system for glass melting furnaces according to claim 1, characterized in that, The compressed air source (2) in the pressure pipeline system is connected to the top of the storage tank (1) through an independent pressure regulating valve.

5. The automatic defoamer dispensing system for glass melting furnaces according to claim 1, characterized in that, The control system is connected to the main DCS system (8) of the glass melting furnace.

6. The automatic defoamer dispensing system for glass melting furnaces according to claim 1, characterized in that, The storage tank (1) is also equipped with a pneumatic liquid inlet valve and a pneumatic pressure relief valve, both of which are connected to the control system.

7. The system according to claim 1, characterized in that: The pressure pipeline system includes two switchable storage tanks (1), each of which is equipped with an independent pressure and level monitoring device and is connected to the control system.

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