Float glass production system

Abstract

The utility model relates to the technical field of float glass production, and provides a float glass production system which comprises air separation equipment, a liquefied gas storage container, a cooling tower and gas utilization equipment, a heat exchange pipeline used for cooling and circulating a cooling working medium is arranged in the cooling tower, the liquefied gas storage container is provided with a liquefied gas inlet used for being connected with an outlet of the air separation equipment and a liquefied gas outlet used for being connected with the first end of the heat exchange pipeline, and the second end of the heat exchange pipeline is connected with the gas utilization equipment and the atmosphere. In practical application, when the cooling capacity of the cooling tower is insufficient and the temperature of the circulating cooling working medium is higher than the required temperature, the liquefied gas is conveyed into the heat exchange pipeline of the cooling tower, and the liquefied gas exchanges heat with the circulating cooling working medium to quickly cool the circulating cooling working medium, so that the stability of the cooling effect of the cooling tower is improved; and the operation stability and safety of the to-be-cooled equipment are ensured.

Description

Technical Field

[0001] This utility model relates to the field of float glass production technology, and in particular to a float glass production system. Background Technology

[0002] In the float glass production process, the raw materials are melted at high temperature to form molten glass, which is then float-formed in a tin bath and cooled in an annealing furnace. During this process, the equipment generates a lot of heat, which needs to be continuously cooled through a circulating water circuit to ensure that the operating temperature of the equipment is controlled within a safe threshold.

[0003] Traditional circulating water circuits mainly use open cooling towers to cool the circulating water. This is achieved by increasing the heat exchange area between the circulating water and the air, and by using fans to accelerate airflow. However, when encountering hot and humid weather, the temperature difference between the circulating water and the ambient temperature is small, resulting in poor cooling effect. This requires increasing the number and power of the cooling tower fans, which increases power consumption and cannot guarantee that the circulating water can be cooled to the required temperature. This leads to poor stability and safety of the equipment to be cooled in the float glass production system. Utility Model Content

[0004] This utility model discloses a float glass production system that solves the technical problem of unstable cooling effect of cooling towers in existing float glass production systems.

[0005] This utility model provides a float glass production system, including: air separation equipment, liquefied gas storage container, cooling tower and gas-using equipment;

[0006] The cooling tower is used to provide circulating cooling medium for the equipment to be cooled in the system;

[0007] The cooling tower is equipped with heat exchange pipes for cooling the circulating cooling medium.

[0008] The liquefied gas storage container is provided with a liquefied gas inlet for connection to the outlet of the air separation equipment and a liquefied gas outlet for connection to the first end of the heat exchange pipeline.

[0009] The second end of the heat exchange pipeline is connected to the gas-using equipment and the atmosphere, respectively.

[0010] Optionally, the liquefied gas inlet and liquefied gas outlet of the liquefied gas storage container are both located at the bottom of the liquefied gas storage container.

[0011] Optionally, the top of the liquefied gas storage container is provided with a first gas outlet for connection to the gas-using equipment and a second gas outlet for connection to the atmosphere.

[0012] Optionally, the heat exchange pipeline is a heat exchange coil.

[0013] Optionally, the liquefied gas storage container specifically includes a liquid nitrogen storage container and a liquid oxygen storage container;

[0014] The liquefied gas inlet of the liquid nitrogen storage container is connected to the liquid nitrogen outlet of the air separation unit, and the liquefied gas outlet of the liquid nitrogen storage container is connected to the first end of the heat exchange pipeline. A valve is installed on the connected pipeline.

[0015] The liquefied gas inlet of the liquid oxygen storage container is connected to the liquid oxygen outlet of the air separation unit, and the liquefied gas inlet of the liquid oxygen storage container is connected to the first end of the heat exchange pipeline, with a valve installed on the connected pipeline.

[0016] Optionally, a flow regulating valve and a check valve are provided on the pipeline connecting the liquefied gas outlet of the liquid nitrogen storage container and the first end of the heat exchange pipeline.

[0017] Optionally, the cooling tower is equipped with a temperature detection device for detecting the temperature of the circulating cooling medium.

[0018] Optionally, the cooling tower is an open cooling tower.

[0019] Optionally, the heat exchange pipeline is made of copper.

[0020] Optionally, the pipe connecting the liquefied gas outlet of the liquid oxygen storage container to the first end of the heat exchange pipeline is provided with an insulation layer.

[0021] As can be seen from the above technical solutions, this utility model has the following advantages:

[0022] This invention provides a float glass production system, comprising: an air separation unit, a liquefied gas storage container, a cooling tower, and gas-using equipment. The cooling tower provides a circulating cooling medium for the equipment to be cooled within the system. The cooling tower contains heat exchange pipes for cooling the circulating cooling medium. The liquefied gas storage container has a liquefied gas inlet connected to the outlet of the air separation unit and a liquefied gas outlet connected to the first end of the heat exchange pipes. The second end of the heat exchange pipes is connected to the gas-using equipment and the atmosphere. In practical applications, when the cooling tower's cooling capacity is insufficient, causing the temperature of the circulating cooling medium to exceed the required temperature, liquefied gas is supplied to the cooling tower's heat exchange pipes. The liquefied gas exchanges heat with the circulating cooling medium within the cooling tower, rapidly cooling the medium and improving the stability of the cooling tower's cooling effect, thus ensuring the stability and safety of the equipment to be cooled within the system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a float glass production system provided in Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of a float glass production system provided in Embodiment 2 of this utility model.

[0026] Attached diagram labels: 1-Air separation unit, 2-Liquefied gas storage container, 21-Liquid nitrogen storage container, 22-Liquid oxygen storage container, 3-Cooling tower, 31-Heat exchange pipeline, 4-Gas-using equipment, 51-First liquid inlet valve, 52-Second liquid inlet valve, 61-First liquid outlet valve, 62-Second liquid outlet valve, 63-Third liquid outlet valve, 64-Fourth liquid outlet valve, 71-First flow regulating valve, 72-Second flow regulating valve, 81-First check valve, 82-Second check valve, 91-First gas outlet valve, 92-Second gas outlet valve, 93-Third gas outlet valve, 94-Fourth gas outlet valve, 95-Fifth gas outlet valve, 96-Sixth gas outlet valve. Detailed Implementation

[0027] This utility model discloses a float glass production system to solve the technical problem of unstable cooling effect of cooling towers in existing float glass production systems.

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to connections within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please see Figure 1 The float glass production system provided in Embodiment 1 of this utility model includes: an air separation unit 1, a liquefied gas storage container 2, a cooling tower 3, and a gas-using device 4;

[0032] Cooling tower 3 is used to provide circulating cooling medium for the equipment to be cooled in the float glass production system;

[0033] The cooling tower 3 is equipped with heat exchange pipes for cooling the circulating cooling medium;

[0034] The liquefied gas storage container 2 is provided with a liquefied gas inlet for connection to the outlet of the air separation unit 1 and a liquefied gas outlet for connection to the first end of the heat exchange pipeline.

[0035] The second end of the heat exchange pipeline is connected to the gas-using equipment 4 and the atmosphere, respectively.

[0036] It is understandable that a float glass production system refers to a system that produces flat glass through the float process. This system can complete processes such as raw material melting, float forming, and annealing cooling. Among them, the melting equipment used for raw material melting, the forming equipment used for float forming, the annealing equipment used for annealing cooling, and the cooling equipment all need to be cooled by circulating cooling medium.

[0037] The cooling tower 3 can be an open cooling tower, with heat exchange pipes inside serving as auxiliary cooling. The circulating cooling medium, after being cooled in the cooling tower 3, is pressurized by a pump and transported to the circulating medium pipeline inside or around the equipment to be cooled, thus cooling the equipment. The heated circulating cooling medium is then transported back to the cooling tower 3 for further cooling.

[0038] Air separation unit 1, also known as air separation equipment, is used to separate and purify gases such as oxygen and nitrogen in the air to provide the gas required by gas-using equipment 4. To ensure the stability of gas flow and pressure during the production process, liquefied gas storage containers 2 are provided to store the liquefied gas produced by air separation unit 1. The number of liquefied gas storage containers 2 can be selected according to the number of types of gases produced by air separation unit 1 and the amount of liquefied gas. Both the liquefied gas inlet and the liquefied gas outlet are located at the bottom of the liquefied gas storage containers 2. A first gas outlet can be provided at the top of the liquefied gas storage containers 2 for connection with gas-using equipment 4. When the cooling capacity of the cooling tower 3 is sufficient, the vaporized gas at the top of the liquefied gas storage containers 2 can be directly transported to gas-using equipment 4 through the first gas outlet. A second gas outlet can also be provided at the top of the liquefied gas storage containers 2 for connection with the atmosphere. When the liquefied gas produced by air separation unit 1 is excessive, it can be vented through the second gas outlet.

[0039] Gas-using equipment 4 refers to equipment in the float glass production system that requires gas-assisted operation, such as melting equipment (furnace), forming equipment (tin bath), or pneumatic equipment (pneumatic cutting machine, pneumatic transmission device), etc.; the nitrogen produced by the air separation unit 1 is introduced into the tin bath as a protective gas, which can create an inert environment inside the tin bath and prevent the molten tin from oxidizing and contaminating the glass surface at high temperatures; the oxygen produced by the air separation unit 1 is introduced into the combustion chamber of the furnace to assist combustion, which can improve combustion efficiency and reduce fuel consumption.

[0040] To ensure high heat exchange efficiency, copper pipes are preferred for the heat exchange pipelines; the shape of the heat exchange pipelines is preferably a heat exchange coil as shown in the attached diagram, consisting of multiple U-shaped bends connected continuously to form a serpentine bend; at least one heat exchange pipeline is installed inside the cooling tower 3; the liquefied gas outlet of the liquefied gas storage container 2 storing different types of gases can be connected to the first end of different heat exchange pipelines respectively, and the second end of each heat exchange pipeline is connected to different gas-using equipment respectively; the liquefied gas storage container 2 storing different types of gases can also be connected to the first end of the same heat exchange pipeline, and each pipeline connecting the liquefied gas storage container 2 and the heat exchange pipeline is equipped with a valve, which allows the operator to open and close the valves to ensure that only one type of gas flows through the heat exchange pipeline at the same time.

[0041] A flow regulating valve and a check valve can also be installed on the pipeline connecting the liquefied gas outlet of the liquid nitrogen storage container 2 and the first end of the heat exchange pipeline. Among them, compared with the liquid outlet valve and the flow regulating valve, the check valve is installed closer to the first end of the heat exchange pipeline. The check valve can prevent the liquefied gas from flowing back in the pipeline. A temperature detection device for detecting the temperature of the circulating cooling medium is installed in the cooling tower 3. The operator can control the temperature of the circulating cooling medium by adjusting the opening of the flow regulating valve according to the temperature difference between the required temperature and the actual temperature of the circulating cooling medium.

[0042] It should be noted that an insulation layer can be installed on the outside of the pipe connecting the liquefied gas outlet of the liquid oxygen storage container 2 and the first end of the heat exchange pipeline to reduce the amount of vaporization of the liquefied gas during transportation, ensuring that the liquefied gas can reach the heat exchange coil in a liquid or lower temperature gaseous state; the low temperature of the liquefied gas itself (e.g., the boiling point of liquid nitrogen is -196℃ and the boiling point of liquid oxygen is -183℃) and / or the heat absorption during vaporization in the heat exchange pipeline can rapidly cool the circulating cooling medium in the cooling tower; the temperature of the circulating cooling medium to be cooled in the cooling tower 3 is generally 40℃ to 50℃ and flows continuously, and the heat exchanged instantaneously by the heat exchange pipeline is insufficient to cause the water near the heat exchange pipeline to freeze.

[0043] In practical applications, when the cooling capacity of cooling tower 3 is insufficient, causing the temperature of the circulating cooling medium to exceed the required temperature, liquefied gas from liquefied gas storage container 2 is transported to the heat exchange pipeline of cooling tower 3. The liquefied gas exchanges heat with the circulating cooling medium in cooling tower 3, causing the circulating cooling medium to cool down rapidly, improving the stability of the cooling effect of the cooling tower, and ensuring the stability and safety of the equipment to be cooled in the system. The gas output from the second end of the heat exchange pipeline can be transported to the gas-using equipment or discharged into the atmosphere according to the actual production situation. Alternatively, when the air separation unit 1 produces excess gas, the excess liquefied gas is used to cool the circulating cooling medium, reducing the overall operating power of cooling tower 3 (the operating power of the cooling tower 3 fan is reduced), achieving the purpose of energy saving and consumption reduction. The gas output from the second end of the heat exchange pipeline can be discharged into the atmosphere.

[0044] Please see Figure 2 The second embodiment of this utility model provides a float glass production system, including an air separation unit 1, a liquid nitrogen storage container 21, a liquid oxygen storage container 22, a cooling tower 3, and a gas-using device 4.

[0045] Cooling tower 3 is used to provide circulating cooling medium for the equipment to be cooled in the float glass production system;

[0046] The cooling tower 3 is equipped with heat exchange pipes 31 for cooling the circulating cooling medium;

[0047] The liquefied gas inlet at the bottom of the liquid nitrogen storage container 21 is connected to the liquid nitrogen outlet of the air separation equipment 1, and a first liquid inlet valve 51 is provided on the connected pipeline; the liquefied gas outlet at the bottom of the liquid nitrogen storage container 21 is connected to the first end of the heat exchange pipeline 31, and a first liquid outlet valve 61, a first flow regulating valve 71, and a first check valve 81 are provided in sequence on the connected pipeline.

[0048] The liquefied gas inlet at the bottom of the liquid oxygen storage container 22 is connected to the liquid oxygen outlet of the air separation unit 1, and a second liquid inlet valve 52 is provided on the connecting pipeline; the liquefied gas inlet at the bottom of the liquid oxygen storage container 22 is connected to the first end of the heat exchange pipeline 31, and a second liquid outlet valve 62, a second flow regulating valve 72, and a second check valve 82 are provided in sequence on the connecting pipeline.

[0049] The second end of the heat exchange pipeline 31 is connected to the gas-using equipment 4, and a first gas outlet valve 91 is installed on the connected pipeline; the second end of the heat exchange pipeline 31 is connected to the atmosphere, and a second gas outlet valve 92 is installed on the connected pipeline.

[0050] Furthermore, the first gas outlet at the top of the liquid nitrogen storage container 21 is connected to the gas-using equipment 4, and a third gas outlet valve 93 is installed on the connected pipeline;

[0051] The first gas outlet at the top of the liquid oxygen storage container 22 is connected to the gas-using equipment 4, and a fourth gas outlet valve 94 is installed on the connected pipeline.

[0052] Furthermore, the second gas outlet at the top of the liquid nitrogen storage container 21 is connected to the atmosphere, and a fifth gas outlet valve 95 is installed on the connected pipeline;

[0053] The second gas outlet at the top of the liquid oxygen storage container 22 is connected to the atmosphere, and a sixth gas outlet valve 96 is installed on the connected pipeline.

[0054] Furthermore, the pipeline between the first liquid outlet valve 61 and the first flow regulating valve 71 is connected to the gas-using equipment 4, and a third liquid outlet valve 63 is installed on the connected pipeline;

[0055] The pipeline between the second liquid outlet valve 62 and the second flow regulating valve 72 is connected to the gas-using equipment 4, and a fourth liquid outlet valve 64 is installed on the connected pipeline.

[0056] The above provides a detailed description of a float glass production system provided by this utility model. For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A float glass production system, characterized in that, include: Air separation equipment, liquefied gas storage containers, cooling towers, and gas-using equipment; The cooling tower is used to provide circulating cooling medium for the equipment to be cooled in the system; The cooling tower is equipped with heat exchange pipes for cooling the circulating cooling medium. The liquefied gas storage container is provided with a liquefied gas inlet for connection to the outlet of the air separation equipment and a liquefied gas outlet for connection to the first end of the heat exchange pipeline. The second end of the heat exchange pipeline is connected to the gas-using equipment and the atmosphere, respectively.

2. The float glass production system according to claim 1, characterized in that, The liquefied gas inlet and liquefied gas outlet of the liquefied gas storage container are both located at the bottom of the liquefied gas storage container.

3. The float glass production system according to claim 1, characterized in that, The top of the liquefied gas storage container is provided with a first gas outlet for connection to the gas-using equipment and a second gas outlet for connection to the atmosphere.

4. The float glass production system according to claim 1, characterized in that, The heat exchange pipeline is a heat exchange coil.

5. The float glass production system according to claim 1, characterized in that, The liquefied gas storage container specifically includes a liquid nitrogen storage container and a liquid oxygen storage container; The liquefied gas inlet of the liquid nitrogen storage container is connected to the liquid nitrogen outlet of the air separation unit, and the liquefied gas outlet of the liquid nitrogen storage container is connected to the first end of the heat exchange pipeline. A valve is installed on the connected pipeline. The liquefied gas inlet of the liquid oxygen storage container is connected to the liquid oxygen outlet of the air separation unit, and the liquefied gas inlet of the liquid oxygen storage container is connected to the first end of the heat exchange pipeline, with a valve installed on the connected pipeline.

6. The float glass production system according to claim 5, characterized in that, A flow regulating valve and a check valve are installed on the pipeline connecting the liquefied gas outlet of the liquid nitrogen storage container to the first end of the heat exchange pipeline.

7. The float glass production system according to claim 6, characterized in that, The cooling tower is equipped with a temperature detection device for detecting the temperature of the circulating cooling medium.

8. The float glass production system according to claim 1, characterized in that, The cooling tower is an open cooling tower.

9. The float glass production system according to claim 1, characterized in that, The heat exchange pipeline is made of copper.

10. The float glass production system according to claim 5, characterized in that, The pipe connecting the liquefied gas outlet of the liquid oxygen storage container to the first end of the heat exchange pipeline is provided with an insulation layer.

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