Glass kiln natural gas spray gun fire leakage early warning system

Abstract

The utility model discloses a glass kiln natural gas spray gun fire leakage early warning system, and belongs to the field of glass production safety. The glass kiln comprises at least two small furnaces, each small furnace comprises an arch top, an inner side wall and an outer side wall, a nozzle brick is arranged on the outer side wall of each small furnace, a hole is formed in each nozzle brick, a nozzle of a natural gas spray gun can be inserted into each nozzle brick for gas supply, and the system comprises a thermosensitive galvanic couple, a thermosensitive galvanic couple cable, a controller and an audible and visual alarm. The thermosensitive galvanic couple is arranged in an area between the outer side walls of two adjacent small furnaces, and the thermosensitive galvanic couple is connected to the controller through the thermosensitive galvanic couple cable; and the controller is connected with the audible and visual alarm. According to the utility model, problems can be timely fed back to personnel in a central control room within the shortest time of fire leakage of the natural gas spray gun, so that the central control personnel can timely deal with the problems.

Description

Technical Field

[0001] The utility model belongs to the field of glass production safety. Specifically, the utility model relates to a natural gas gun leakage fire warning system for a glass furnace. Background Art

[0002] In recent years, due to the rapid development of photovoltaic glass enterprises and an increasing number of production enterprises of photovoltaic cell components, the supply-demand relationship in the glass market has become extremely complex. With the continuous rise of various raw material costs and fuel costs reaching new highs, in order to adapt to the high-speed development of enterprises and the increasingly severe external environmental changes, the production costs of enterprises have been rising continuously. To survive, enterprises must reduce production costs from multiple aspects, stabilize production processes, and ensure the safety of the furnace.

[0003] Regarding the current natural gas combustion system for furnace melting, if the natural gas gun leaks fire, it may cause damage to the natural gas gun and the steel structure of the furnace, which is not conducive to the stability of the melting process and the safe operation of the burner equipment. At the same time, long-term leakage of fire will also lead to a long-term shutdown of the natural gas gun after damage, reducing production efficiency. The existing methods for warning of leakage of fire mainly rely on manual on-site inspection for leakage of fire when the natural gas gun leaks fire. This method has uncertainty, cannot detect the leakage of fire in a timely and accurate manner, and is also prone to danger to personnel.

[0004] The comparative document (publication number: CN118125694A, publication date: June 4, 2024) discloses a display electronic glass furnace system, a control method, an electronic device, and a medium. The present invention includes a furnace body, a liquid level control system, a pressure control system, a combustion system, an electro-boosting melting system, a cooling air system, and a temperature control system. Through the coordinated action of the above systems, the stable operation of the display electronic glass furnace system is ensured. The present invention realizes the real-time monitoring and precise control of various parameters (such as temperature, pressure, liquid level, etc.) in the furnace through liquid level control, pressure control, combustion control, electro-boosting melting control, cooling air control, and temperature control; adjusts process parameters according to different production requirements to produce large-size display glass of various specifications and performances; meets the continuous and stable production of large-size display glass on the production line; and ensures that each piece of glass can meet high-standard quality requirements.

[0005] However, the above comparative document does not involve the detection of leakage of fire of the natural gas gun and its pipeline in the area outside the side wall of the adjacent small furnace, but sets thermocouples inside the furnace for temperature control, and cannot realize the early warning of leakage of fire of the natural gas gun, which is essentially different from the present application. Content of the Utility Model

[0006] The utility model aims to overcome the deficiencies of the prior art and proposes a natural gas gun leakage fire warning system for a glass furnace to achieve the following purposes: through the system of the present application, solve the problems of long leakage fire time of the current natural gas gun and uncertainty of personnel discovering the leakage fire, avoid the burning damage of the natural gas gun and the damage of the steel structure of the furnace, avoid the long-term shutdown of the furnace after the natural gas gun is damaged due to long-term leakage fire, thereby ensuring the stability of the melting process and the safe operation of the burner equipment, further improving the production efficiency, reducing the operation cost of the enterprise, and enhancing the industry competitiveness of the enterprise.

[0007] To achieve the above object, the technical solution adopted by the utility model is: a natural gas gun leakage fire warning system for a glass furnace, the glass furnace includes at least two small furnaces, the small furnace includes a vault, an inner wall and an outer wall, wherein, a nozzle brick is arranged on the outer wall of the small furnace, and an opening is formed on the nozzle brick for inserting the nozzle of the natural gas gun to supply gas. The system includes a thermocouple, a thermocouple cable, a controller and an audible and visual alarm. Among them, the thermocouple is arranged in the area between the outer walls of two adjacent small furnaces, and the thermocouple is connected to the controller through the thermocouple cable; the controller is connected to the audible and visual alarm.

[0008] Preferably, in the area between the outer walls of two adjacent small furnaces, the horizontal installation position of the thermocouple is: the midpoint position of the horizontal connection line of the nozzle bricks of the two outer walls, and the vertical installation position of the thermocouple is: on the vertical line drawn upward from the midpoint position.

[0009] Preferably, the vertical installation position of the thermocouple is: 50 cm from the vertical line drawn upward from the midpoint position.

[0010] Preferably, a high-temperature resistant outer sleeve is arranged on the thermocouple cable.

[0011] Preferably, a cable bridge is arranged on the vault of the small furnace, and the cable bridge is used to place the thermocouple cable.

[0012] Preferably, the controller is a DCS system, and the DCS system is used to analyze the temperature change of the electrical signal fed back by the thermocouple, and when the temperature change exceeds the preset limit value, send an instruction to the audible and visual alarm for early warning.

[0013] The technical effects of the present utility model are as follows: (1) This application can promptly feedback the problem to the central control room personnel within the shortest time when the natural gas spray gun leaks fire, so that the central control personnel can handle it in a timely manner, thereby avoiding the burning damage of the natural gas spray gun, avoiding the burning damage of the steel structure on the side wall of the small furnace, and avoiding process fluctuations caused by the fire extinguishing after the spray gun is burned. (2) This application detects fire leakage through a thermocouple. Among them, the thermocouple is arranged at a suitable position in the area between the outer side walls of two small furnaces, and can accurately detect the environmental temperature change caused by the fire leakage of the natural gas spray gun and its pipeline, ensuring the accuracy of temperature detection. (3) This application also protects the thermocouple cable, including the protection of the laying position and the high-temperature resistant outer sleeve, avoiding the burning damage of the cable by high temperature and ensuring the stable transmission of signals. (4) This application judges whether the temperature change of the thermocouple is within the normal limit through the DCS system, and borrows the real-time and efficient data processing ability of the DCS system to improve the judgment speed and accuracy. (5) This application is provided with an audible and visual alarm, so that when the natural gas spray gun leaks fire, the central control personnel can discover it in a timely manner. Description of the Drawings

[0014] Figure 1 It is a structural diagram of a natural gas spray gun fire leakage warning system for a glass furnace according to an embodiment of the present utility model. Detailed Embodiment

[0015] The following is a further detailed description of the specific embodiments of the present utility model by describing the embodiments with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present utility model, and contribute to its implementation. It should be noted that the terms "first", "second", etc. used in this application are only for the convenience of describing the technical solutions to distinguish different components, and do not limit this application. To make the technical solutions of the present utility model clearer, the present utility model is explained and illustrated through the following embodiments.

[0016] A natural gas spray gun fire leakage warning system for a glass furnace, the glass furnace includes at least two small furnaces, the small furnace includes a crown, an inner side wall and an outer side wall. Among them, a nozzle brick is arranged on the outer side wall of the small furnace, and a hole is opened on the nozzle brick for the nozzle of the natural gas spray gun to be inserted for gas supply. The system includes a thermocouple, a thermocouple cable, a controller, and an audible and visual alarm. Among them, the thermocouple is arranged in the area between the outer side walls of two adjacent small furnaces, and the thermocouple is connected to the controller through the thermocouple cable; the controller is connected to the audible and visual alarm. Referring to the above structure, the system structure of this embodiment is as Figure 1 shown.

[0017] Specifically, in this embodiment, two adjacent small furnaces are respectively the first small furnace and the second small furnace, and the first small furnace and the second small furnace are symmetrical to each other. In the area between the outer walls of the first small furnace and the outer walls of the second small furnace, natural gas spray guns and their pipelines are arranged. Among them, the nozzle bricks of the first small furnace are supplied with gas by inserting the first natural gas spray gun, and the nozzle bricks of the second small furnace are supplied with gas by inserting the second natural gas spray gun.

[0018] When a fire leak occurs in the first or second natural gas spray gun and its pipeline, the temperature in the area between the outer walls of the first small furnace and the outer walls of the second small furnace will change significantly. Therefore, based on this, in this embodiment, this temperature change is automatically detected by a thermocouple. The thermocouple can convert the ambient temperature change where it is located into an electrical signal, and in this embodiment, the electrical signal is then sent to the controller through a thermocouple cable.

[0019] To ensure that the thermocouple can accurately and timely identify the temperature change, the thermocouple needs to be installed in a suitable position. In this embodiment, in the area between the outer walls of two adjacent small furnaces, the horizontal installation position of the thermocouple is: the midpoint position of the horizontal connection line between the nozzle bricks of the outer wall of the first small furnace and the nozzle bricks of the outer wall of the first small furnace; the vertical installation position of the thermocouple is: on the vertical line drawn upward from the midpoint position. Specifically, in this embodiment, the vertical installation position of the thermocouple is: at 50 cm on the vertical line drawn upward from the midpoint position. This distance can not only ensure that the thermistor is not affected by an open flame and avoid damage, but also ensure the sensitivity and accuracy of the thermistor detection. In actual implementation, the vertical distance of the thermocouple on the vertical line can be flexibly set according to the actual situation.

[0020] The electrical signal of the thermocouple needs to be transmitted through a thermocouple cable. However, due to the production environment of the glass furnace and factors such as the sudden rise in ambient temperature caused by a fire leak in the natural gas spray gun, the traditional thermocouple cable directly exposed to the environment may cause damage to the cable due to high temperature. Therefore, in this embodiment, the thermocouple cable is also protected. Specifically, in this embodiment, a high-temperature resistant outer jacket is provided on the thermocouple cable. Through the wrapping of the high-temperature resistant outer jacket, the cable is prevented from being directly exposed to the high-temperature environment; at the same time, in this embodiment, a special cable bridge is provided on the top of the small furnace arch. The cable bridge is used to place the thermocouple cable, so that the thermocouple cable is isolated from the environment where an open flame may occur. Through the protection of this layout position and the high-temperature resistant outer jacket in this embodiment, the high temperature damage to the cable is avoided, and the stable transmission of the signal is ensured.

[0021] In this embodiment, the controller selects a DCS system (Distributed Control System), which is used to analyze the temperature change of the electrical signal fed back by the thermocouple, and when the temperature change exceeds the preset limit value, send an instruction to the audible and visual alarm for early warning. The DCS system is a control system widely used in production plants, with powerful data processing capabilities. At the same time, it also has the advantages of high reliability and high scalability. In actual implementation, the controller can be flexibly selected according to the actual situation. In this embodiment, the DCS system that was originally applied in the production plant is used, which avoids the increase in costs caused by factors such as re-laying of wire harnesses when using other controllers or systems. At the same time, borrowing the real-time and efficient data processing capabilities of the DCS system can also improve the speed and accuracy of fire leakage judgment.

[0022] After the thermocouple transmits the electrical signal to the DCS system, the DCS system determines whether the temperature change of the thermocouple is within the preset limit value. Among them, the DCS system needs to analyze the electrical signal fed back by the thermocouple. After multiple tests and debugging, a suitable temperature change value is determined as the preset limit value. (The ambient temperature of a normal thermocouple is about 150°C, and the ambient temperature is about 300°C when there is a fire leakage from the natural gas spray gun). Therefore, the preset limit value in this embodiment can be 20°C). When the DCS system detects that the temperature change value of the thermocouple is greater than or equal to the preset limit value, it will send a warning instruction to the audible and visual alarm. After receiving the instruction, the audible and visual alarm will issue an audible and visual alarm to remind the personnel in the central control room to handle the problem of fire leakage from the natural gas spray gun in time.

[0023] Due to the adoption of the above technical solution, compared with the prior art, the present application can timely feedback the problem to the personnel in the central control room within the shortest time when there is a fire leakage from the natural gas spray gun, so that the central control personnel can handle it in time, avoid the burning of the natural gas spray gun, avoid the burning of the steel structure on the side wall of the small furnace, and avoid the process fluctuation caused by the stop of the fire after the spray gun is burned, thereby ensuring the stability of the melting process and the safe operation of the burner equipment, and further improving the production efficiency, reducing the operation cost of the enterprise, and enhancing the industry competitiveness of the enterprise.

[0024] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. A glass furnace natural gas spray gun fire leakage warning system, the glass furnace comprises at least two small furnaces, the small furnace comprises a crown, an inner wall and an outer wall, wherein: A nozzle brick is arranged on the outer wall of the small furnace, and a hole is opened on the nozzle brick for inserting the nozzle of the natural gas spray gun for gas supply. It is characterized in that: the system includes a thermistor, a thermistor cable, a controller, and an audible and visual alarm, wherein the thermistor is arranged in the area between the outer walls of two adjacent small furnaces, and the thermistor is connected to the controller through the thermistor cable; the controller is connected to the audible and visual alarm.

2. A glass furnace natural gas spray gun fire leakage warning system according to claim 1, characterized in that: In the area between the outer walls of two adjacent small furnaces, the horizontal installation position of the thermocouple is: the midpoint of the horizontal line connecting the two outer wall nozzle bricks, and the vertical installation position of the thermocouple is: on the vertical line drawn upward from the midpoint.

3. A glass furnace natural gas spray gun fire leakage warning system according to claim 2, characterized in that: The vertical installation position of the thermocouple is 50 cm from the vertical line drawn upward from the midpoint.

4. A glass furnace natural gas spray gun fire leakage warning system according to claim 1, characterized in that: The thermistor cable is provided with a high temperature resistant jacket.

5. A glass furnace natural gas spray gun fire leakage warning system according to claim 1 or 4, characterized in that: A cable bridge is arranged on the top of the small furnace arch, and the cable bridge is used to place the thermocouple cable.

6. A glass furnace natural gas spray gun fire leakage warning system according to claim 1, characterized in that: The controller is a DCS system, which is used to analyze the temperature change of the electrical signal fed back by the thermocouple, and send instructions to the sound and light alarm for early warning when the temperature change exceeds a preset limit.

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