A heat exchange furnace for ink glass production, a heat exchange process and a production line

Abstract

The application provides a heat exchange furnace for ink glass production, a heat exchange process and a production line. The heat exchange furnace comprises a furnace body and a glass conveying device arranged in the furnace body. One or more heat exchange pipes are arranged in the furnace body. The heat exchange pipes extend along the glass conveying direction and are parallel to the glass conveying plane. The air inlet end of the heat exchange pipe is connected with the outside through an air inlet pipe. The air outlet end of the heat exchange pipe is connected with the air inlet of an air extractor outside the furnace body. An adjusting valve is arranged on the air inlet side or the air outlet side of the heat exchange pipe or inside the heat exchange pipe. A heating device is arranged in the furnace body. The heat exchange process and the production line both adopt the heat exchange furnace. The heat exchange rate and uniformity of the glass can be accurately controlled. The produced ink glass has high ink sintering degree, low residual stress and high flatness.

Description

Technical Field

[0001] This invention belongs to the field of glass deep processing technology, specifically relating to a heat exchange furnace, heat exchange process and production line for ink glass production. Background Technology

[0002] After glass and ink are sintered at high temperatures, they are usually cooled to form ink-coated glass with a high degree of sintering. There are generally two existing cooling methods. One is to directly blow cooling air onto the glass surface. This method allows adjustment of the cooling rate by regulating the fan power or air pressure. However, regardless of the cooling rate, the cooled glass rarely achieves a low stress value and high flatness, making further processing impossible. For example, after the ink in automotive glass is sintered and cooled, the residual stress value can still reach as low as 15 MPa, and the flatness is poor. During subsequent coating and removal processes, the poor flatness leads to poor coating and removal effects, or even prevents these processes from being performed. In the next hot bending process, because one piece of ink-coated glass and another piece of non-ink-coated glass are bent simultaneously, the higher residual stress value of the ink-coated glass causes inconsistent deformation between the two pieces during hot bending, resulting in the inability to produce qualified double-layered laminated hot-bent glass.

[0003] Another cooling method is to allow the glass to cool naturally through direct contact with the air. However, the cooling rate of this method cannot be adjusted, and the glass has high residual stress and poor flatness, making it impossible to proceed to the next step of processing.

[0004] Therefore, there is an urgent need to provide a glass deep processing production equipment with high ink sintering degree, low glass residual stress, and high glass flatness. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a heat exchange furnace, heat exchange process, and production line for producing ink-coated glass, which produces glass products with high ink sintering degree, low residual stress, and high flatness.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention proposes a heat exchange furnace for producing ink-coated glass, comprising a furnace body and a glass conveying device disposed within the furnace body. The furnace body contains one or more heat exchange tubes extending along the glass conveying direction and parallel to the glass conveying plane. The air inlet of the heat exchange tube is connected to the outside via an air inlet pipe, and the air outlet of the heat exchange tube is connected to the air inlet of an exhaust fan outside the furnace body. A regulating valve is provided on the air inlet side, air outlet side, or inside the heat exchange tube. A heating device is disposed within the furnace body.

[0008] Its beneficial effects are as follows: The exhaust fan of this heat exchange furnace draws air from outside the furnace body. The air flows through the heat exchange pipes and is then exhausted by the exhaust fan. The airflow within the heat exchange pipes facilitates heat exchange between the pipes and the hot glass, thus removing heat from the glass. The air does not directly contact the glass, allowing for slow cooling and reducing residual stress. The suction method used to introduce air creates a negative pressure within the heat exchange pipes, preventing air leakage into the furnace and direct contact with the glass. The airflow is controlled by adjusting the opening of the regulating valve, thereby controlling the heat exchange rate and ensuring that residual stress reaches the target value. A heating device is installed inside the furnace to preheat it, preventing excessive temperature differences when the glass enters the furnace, which could lead to an excessively rapid heat exchange rate.

[0009] Specifically, the heat exchange tube is an upper heat exchange tube, which is located above the glass conveying device. There are multiple upper heat exchange tubes, which are located in a horizontal plane and spaced apart along the width of the furnace body.

[0010] Its beneficial effects: The heat exchange tube extends along the glass conveying direction and is parallel to the glass conveying plane. In the width direction of the furnace body, the distance between the heat exchange tube and the glass remains consistent, which can ensure the uniformity of heat exchange in all areas of the glass.

[0011] In one embodiment, the air inlet of the heat exchange tube is located on the inlet side of the furnace body, and the air outlet of the heat exchange tube is located on the outlet side of the furnace body.

[0012] Its beneficial effects are: the airflow direction is consistent with the glass conveying direction, resulting in a larger temperature difference between the glass and air when the glass enters the furnace, which improves the heat exchange efficiency in this section. Conversely, the smaller temperature difference between the glass and air when the glass exits the furnace reduces the heat exchange efficiency in this section.

[0013] In another embodiment, the air inlet of the heat exchange tube is located on the outlet side of the furnace body, and the air outlet of the heat exchange tube is located on the inlet side of the furnace body.

[0014] Its beneficial effects are: the airflow direction is opposite to the glass conveying direction, so when the glass enters the furnace, the temperature difference between the glass and the air is small, which can reduce the heat exchange efficiency of this section. When the glass exits the furnace, the temperature difference between the glass and the air is large, which can improve the heat exchange efficiency of this section.

[0015] Furthermore, the multiple upper heat exchange tubes are divided into multiple groups, and the air outlets of the multiple upper heat exchange tubes in each group are connected to the exhaust fan through the air outlet pipe set at the top.

[0016] Its beneficial effects are: by controlling the upper heat exchange tubes in groups, the air flow of each group can be adjusted individually, thereby ensuring that the heat exchange rate of each area of ​​the glass is consistent and further improving the flatness of the glass.

[0017] Furthermore, a regulating valve is installed inside the air outlet duct.

[0018] The upper heat exchange tube is a round tube with a diameter of 40-200mm. The gap between two adjacent upper heat exchange tubes is less than or equal to 200mm. The distance between the upper heat exchange tube and the glass conveying device is 200-600mm.

[0019] Its beneficial effects include: round tubes result in less air pressure loss and smoother airflow. A diameter that is too small or too large for the upper heat exchange tube will affect the heat exchange rate; if the gap between two adjacent upper heat exchange tubes is too large, effective heat exchange cannot be achieved in the gap area, leading to inconsistent heat exchange rates in different areas of the glass and resulting in uneven glass; if the upper heat exchange tube is too close to the glass conveying device, the heat exchange rate is too fast, making precise control difficult and easily leading to high residual stress in the glass; if the upper heat exchange tube is too far from the glass conveying device, the heat exchange rate is too slow, increasing equipment energy consumption and production costs.

[0020] Furthermore, the heat exchange tube also includes multiple lower heat exchange tubes, which are disposed below the glass conveying device.

[0021] Its beneficial effects include: it can facilitate heat exchange on the lower surface of the glass, ensuring that the heat exchange rate on the upper and lower sides of the glass remains consistent.

[0022] Furthermore, the multiple lower heat exchange tubes are divided into multiple groups, and the air outlet of each group of lower heat exchange tubes is connected to the exhaust fan through an air outlet pipe located at the bottom.

[0023] Its beneficial effects include: by controlling the lower heat exchange tubes in groups, the air flow of each group can be adjusted individually, thereby ensuring that the heat exchange rate of each area of ​​the glass remains consistent and further improving the flatness of the glass.

[0024] Furthermore, the lower heat exchange tube is a square tube.

[0025] Its beneficial effects include: easier positioning and installation of square tubes, and easier cleaning of glass shards; it also makes the heat exchange rates of the upper and lower surfaces of the glass more similar, and the stress on the upper and lower surfaces of the glass more uniform.

[0026] Furthermore, the heating device is arranged parallel to the glass conveying direction and is located on both sides of the furnace body in the width direction, which can supplement the heating of both sides of the glass.

[0027] Its beneficial effects are: the glass edges dissipate heat faster than the glass center, and the heating devices are set on both sides in the width direction of the furnace body to supplement the heat of the glass edges, preventing the glass edges and the glass center from having different heat exchange rates, which would result in poor glass flatness.

[0028] Furthermore, the heating device is disposed between the heat exchange tube and the glass conveying device.

[0029] Its beneficial effects include: the heating device is closer to the glass, enabling more precise heating of the glass and reducing energy consumption.

[0030] Furthermore, the heat exchange tube inside the furnace is a square tube, the width of which is greater than the width of the glass plate inside the furnace.

[0031] Its beneficial effects include increasing the heat exchange area and improving heat exchange efficiency.

[0032] Furthermore, the air inlet end of the heat exchange tube is provided with a heater for heating the air.

[0033] Its beneficial effects: The heater can heat the air, control the temperature of the air inside the heat exchange tube, control the temperature difference between the air and the glass, and thus control the heat exchange rate.

[0034] This invention also proposes a heat exchange process for producing ink glass, using the heat exchange furnace described above; comprising the following steps:

[0035] 1) Turn on the heating device to preheat the heat exchange furnace;

[0036] 2) Turn on the exhaust fan to allow outside air to flow from the air inlet to the air outlet of the heat exchange tube and be discharged from the exhaust port of the exhaust fan. The air flow inside the heat exchange tube carries away the heat of the hot glass itself.

[0037] 3) Adjust the opening of the regulating valve to regulate the air flow rate in the heat exchange tube, and adjust the heat exchange efficiency by adjusting the air flow rate.

[0038] The present invention also proposes an ink glass production line, comprising a plurality of heating furnaces, a plurality of heat exchange furnaces and a plurality of air cooling devices arranged sequentially along the glass conveying direction; the heating furnaces are equipped with heating mechanisms, and the heat exchange furnaces are the heat exchange furnaces described above.

[0039] Furthermore, there are multiple heating furnaces, and the heating temperature of the multiple heating furnaces gradually increases along the glass conveying direction.

[0040] Furthermore, there are multiple heat exchange furnaces.

[0041] Furthermore, there are multiple air-cooling devices, and the cooling air pressure of the multiple air-cooling devices gradually increases along the glass conveying direction.

[0042] The beneficial effects of this invention are: This invention does not use direct air cooling to cool the glass, but instead uses the flow of air inside the heat exchange tube to form a heat exchange between the heat exchange tube and the hot glass, thereby removing the heat from the glass. The heat exchange rate can be precisely controlled, and the heat exchange rate in each area of ​​the glass is uniform. This ensures a high degree of sintering of the glass ink, while also giving the glass low residual stress and high flatness. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the heat exchange furnace structure in Embodiment 1 of the present invention;

[0044] Figure 2 This is a schematic diagram of the arrangement of the upper heat exchange tubes in the heat exchange furnace of Embodiment 1 of the present invention;

[0045] Figure 3 This is a cross-sectional view of the heat exchange furnace in Embodiment 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of the heat exchange furnace structure in Embodiment 2 of the present invention;

[0047] Figure 5 This is a schematic diagram of the arrangement of the lower heat exchange tubes in the heat exchange furnace of Embodiment 3 of the present invention;

[0048] Figure 6 This is a cross-sectional view of the heat exchange furnace in Embodiment 3 of the present invention;

[0049] Figure 7 This is a schematic diagram of the arrangement of the upper heat exchange tubes in the heat exchange furnace of Embodiment 5 of the present invention;

[0050] Figure 8 This is a cross-sectional view of the heat exchange furnace in Embodiment 5 of the present invention;

[0051] Figure 9 This is a schematic diagram of the arrangement of the upper heat exchange tubes in the heat exchange furnace of Embodiment 6 of the present invention;

[0052] The markings in the diagram are: 1. Furnace body, 2. Upper heat exchange tube, 3. Glass conveying device, 4. Heating device, 5. Exhaust fan, 6. Regulating valve, 7. Air inlet pipe, 8. Air outlet pipe, 9. Lower heat exchange tube, 10. Electric heater. Detailed Implementation

[0053] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0054] In the description of this invention, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this invention and simplifying the description, and are not intended to 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 invention.

[0055] Example 1: As Figure 1-3 As shown, this embodiment provides a heat exchange furnace for ink glass production, including a furnace body 1, 12 upper heat exchange pipes 2, an exhaust fan 5, 4 regulating valves, a heating device 4, and a glass conveying device 3. The furnace body 1 is divided into an upper furnace body and a lower furnace body, both of which are composed of a furnace shell and insulation material disposed within the furnace shell. The upper furnace body is also connected to a lifting mechanism, which allows the upper furnace body to be raised and lowered relative to the lower furnace body. The glass conveying device 3 is disposed between the upper and lower furnace bodies and is used to convey glass. The glass conveying device 3 is a roller conveyor device, and the rollers can be steel rollers or ceramic rollers.

[0056] The upper heat exchange tube 2 is located inside the upper furnace body. The upper heat exchange tube 2 is a circular tube, meaning its cross-section is circular, resulting in less pressure loss and smoother airflow. The diameter of the upper heat exchange tube 2 is 80mm. Each upper heat exchange tube 2 is parallel to the glass movement direction and is spaced apart along the width of the furnace body. The gap between the outer walls of two adjacent upper heat exchange tubes 2 is 70mm. The centerlines of the 12 upper heat exchange tubes 2 are in a horizontal plane, parallel to the glass conveying plane. The distance from the centerline of the roller conveyor to the horizontal plane containing the centerlines of the 12 upper heat exchange tubes is 400mm. One end of the upper heat exchange tube 2 on the furnace inlet side is the air inlet end, and the other end on the furnace outlet side is the air outlet end. The air inlet ends of all 12 upper heat exchange tubes are connected to a horizontally arranged air inlet pipe 7, with both ends of the air inlet pipe 7 passing through the side walls of the upper furnace body and connecting to the outside. The air outlet ends of the 12 upper heat exchange tubes pass through the top of the upper furnace body and connect to the air inlet of the same exhaust fan 5. After the exhaust fan 5 is started, outside air enters each upper heat exchange tube 2 through the air inlet pipe 7, exchanges heat with the glass on the lower roller conveyor, takes away the heat from the glass, and finally discharges from the exhaust port of the exhaust fan 5.

[0057] Furthermore, among the 12 upper heat exchange tubes, three adjacent upper heat exchange tubes form a group. The air outlet of each group of upper heat exchange tubes is connected to a common air outlet pipe. Each air outlet pipe is equipped with a regulating valve 6. By adjusting the opening of each regulating valve 6, the airflow in each group of upper heat exchange tubes can be regulated. By controlling the upper heat exchange tubes in groups, the airflow of each group can be adjusted individually, thereby ensuring that the heat exchange rate in different areas of the glass remains consistent and further improving the flatness of the glass.

[0058] A regulating valve can also be installed on the air inlet duct to regulate the airflow within the upper heat exchange tube. Alternatively, a regulating valve can be installed inside each upper heat exchange tube to regulate the flow rate within each tube.

[0059] The heating device 4 is located between the upper heat exchange tube 2 and the glass conveying device 3, and is arranged parallel to the glass conveying direction. The heating device 4 can be a ceramic tube with resistance wire wound around it.

[0060] Furthermore, the glass edges dissipate heat faster than the center. Heating devices 4, positioned on both sides of the furnace width, can supplement the heating of the glass edges, preventing inconsistent heat exchange rates between the edges and center, which could lead to poor glass flatness. Simultaneously, the heating devices are arranged parallel to the glass conveying direction, resulting in more precise heating of the glass edges. For the same length of annealing furnace, fewer electric heating tube assemblies are required, reducing energy consumption. The heating devices are positioned between the upper heat exchange tube and the glass conveying device, bringing them closer to the glass for more precise supplemental heating. It is understood that the heating devices could also be flush with the upper heat exchange tube or positioned between the upper heat exchange tube and the inner wall of the furnace top.

[0061] In this embodiment, when cooling the glass, the exhaust fan 5 introduces air from outside the furnace into the upper heat exchange tube 2 and extracts air from the upper heat exchange tube 2. The airflow within the heat exchange tube creates heat exchange between the tube and the hot glass, carrying away heat from the glass. The air does not directly contact the glass, allowing for slow cooling and reducing residual stress. The suction method introduces air, creating a negative pressure inside the upper heat exchange tube 2, preventing air leakage into the annealing furnace and direct contact with the glass, further reducing residual stress. A regulating valve 6 is positioned between the upper heat exchange tube 2 and the exhaust fan 5. Controlling the opening of the regulating valve 6 controls the airflow, thereby controlling the heat exchange rate and ensuring that the residual stress reaches the target value. The upper heat exchange tube 2 extends along the glass conveying direction and is parallel to the glass conveying plane. The distance between the upper heat exchange tube 2 and the glass remains consistent along the furnace width, ensuring uniform heat exchange in all areas of the glass. The heating device 4 is located between the upper heat exchange tube 2 and the glass conveying device 3 to preheat the heat exchange furnace and prevent excessive temperature difference when the glass enters the furnace, which would lead to an excessively fast heat exchange rate. Compared with the upper heat exchange tube, the heating device 4 is closer to the glass surface, thus improving the glass heating efficiency.

[0062] In this embodiment, the airflow direction is consistent with the glass conveying direction. When the glass enters the furnace, the temperature difference between the glass and the air is large, which can improve the heat exchange efficiency of this section. When the glass exits the furnace, the temperature difference between the glass and the air is small, which can reduce the heat exchange efficiency of this section.

[0063] Experiments have shown that when the glass thickness is 2.1 mm, the residual stress of the ink-coated glass produced using this type of heat exchange furnace is approximately 3 MPa. In contrast, the residual stress of glass cooled by air or direct natural cooling can reach as low as approximately 15 MPa.

[0064] In the specific implementation of this embodiment, the following parameters can also be adjusted:

[0065] (1) If the diameter of the upper heat exchange tube is too small, the heat exchange efficiency will be reduced, and a good heat exchange effect will not be achieved. In addition, the number of upper heat exchange tubes required will increase, thereby increasing the production cost and assembly complexity of the equipment. If the diameter of the upper heat exchange tube is too large, the heat exchange efficiency will be reduced, and a good heat exchange effect will not be achieved. Therefore, according to the experiment, a good heat exchange effect and a reduction in residual stress in the glass can be achieved when the diameter of the upper heat exchange tube is 40mm-200mm.

[0066] (2) If the gap between the outer walls of two adjacent upper heat exchange tubes is too large, effective heat exchange will not be possible in the gap area, resulting in inconsistent heat exchange rates in different areas of the glass and causing unevenness in the glass. Therefore, the gap between the outer walls of two adjacent upper heat exchange tubes shall not exceed 200 mm.

[0067] (3) If the distance between the horizontal plane where the center line of the upper heat exchange tube is located and the center line of the roller conveyor is too small, the heat exchange rate will be too fast, making it difficult to control precisely and easily leading to high residual stress in the glass; if the distance between the horizontal plane where the center line of the upper heat exchange tube is located and the center line of the roller conveyor is too large, the heat exchange rate will be too slow, and the required length of the equipment will increase accordingly to achieve the same heat exchange effect, thereby increasing the energy consumption and production cost of the equipment. Therefore, a more reasonable distance is 200-600mm.

[0068] In another embodiment, there are three upper heat exchange tubes, which are square tubes. The thickness of each heat exchange tube is any value between 40-200mm, the gap between adjacent upper heat exchange tubes is less than 200mm, and the plane containing the center line of the upper heat exchange tube is parallel to the glass conveying plane and is 200-600mm away from the center line of the roller conveyor. Each upper heat exchange tube has an air inlet pipe on its air inlet side and an air outlet pipe on its air outlet side. A regulating valve can be installed in the corresponding air inlet pipe, air outlet pipe, or inside each upper heat exchange tube.

[0069] Example 2

[0070] like Figure 4As shown, the difference between the heat exchange furnace in this embodiment and that in embodiment 1 is that the air inlet of the upper heat exchange tube 2 is located on the outlet side of the furnace body 1, and the air outlet of the upper heat exchange tube 2 is located on the inlet side of the furnace body 1. This makes the air flow direction in the upper heat exchange tube 2 opposite to the glass conveying direction. When the glass enters the furnace, the air in the upper heat exchange tube 2 has been preheated, so the temperature difference between the glass and the air is small, which can reduce the heat exchange rate of this section. When the glass exits the furnace, the air at this position has just entered the upper hot air tube 2 and the temperature is low. The temperature difference between the glass and the air is large, which can increase the heat exchange rate of this section.

[0071] Example 3

[0072] like Figure 5-6 As shown, the heat exchange furnace in this embodiment, based on embodiment 1, further includes 12 lower heat exchange tubes 9. The air inlet end of the lower heat exchange tube 9 is connected to an air inlet pipe 7, and both ends of the air inlet pipe 7 are connected to the outside. The lower heat exchange tube 9 and the upper heat exchange tube 2 share one exhaust fan 5. When the exhaust fan is started, outside air enters the upper heat exchange tube 2 and the lower heat exchange tube 9, and the heat of the glass is carried away through heat exchange between the heat exchange tubes and the glass, and finally discharged from the exhaust port of the exhaust fan 5.

[0073] Furthermore, every six adjacent lower heat exchange tubes form a group, and the air outlet of each group of lower heat exchange tubes 9 is connected to an air outlet pipe 8. A regulating valve 6 is installed on the air outlet pipe 8. By adjusting the opening of each regulating valve, the airflow within each group of lower heat exchange tubes is regulated. Regulating valves can also be installed on the air inlet pipe to regulate the airflow within the lower heat exchange tubes. Alternatively, regulating valves can be installed inside each lower heat exchange tube to regulate the flow rate of each tube.

[0074] Specifically, the lower heat exchange tube 9 is a square tube, meaning its cross-section is square. Square tubes are easier to position and install, and glass fragments are easier to clean up. Although the air pressure loss of a square tube is relatively greater than that of a round tube, the lower surface of the glass is in contact with the glass conveying device, and the temperature of the lower surface of the glass dissipates faster than that of the upper surface. The increased air pressure loss of the square tube actually makes the heat exchange rates of the upper and lower surfaces of the glass more similar, resulting in more uniform stress on the upper and lower surfaces of the glass.

[0075] Heating devices can also be installed below the glass conveying device, located on both sides of the furnace body in the width direction, parallel to the glass conveying direction.

[0076] With the above settings, based on Example 1, heat exchange can be performed on the lower surface of the glass, and the air flow rate of the lower heat exchange tube can be adjusted to adjust the heat exchange rate of the lower part of the glass, so that the heat exchange rate of the upper and lower sides of the glass remains consistent.

[0077] Example 4

[0078] The difference between the heat exchange furnace in this embodiment and that in Embodiment 3 is that a separate fan is installed at the outlet end of the lower heat exchange tube. The heat exchange furnace contains a total of two fans. The two fans control the airflow in the upper heat exchange tube and the airflow in the lower heat exchange tube, respectively.

[0079] Example 5

[0080] like Figure 7-8 As shown, the difference between the heat exchange furnace in this embodiment and that in embodiment 1 is that this embodiment uses a hollow rectangular tube as the upper heat exchange tube 2, the width of which is greater than the width of the glass plate inside the furnace, thus covering the lower glass plate. In this case, the regulating valve can be located inside the upper heat exchange tube.

[0081] Example 6

[0082] like Figure 9 As shown, in this embodiment, the heat exchange furnace, based on embodiment 1, is further equipped with an electric heater 10 at the air inlet of the upper heat exchange tube 2, specifically at the inlet of the air inlet pipe 7. The electric heater 10 can heat the air entering the upper heat exchange tube, control the temperature of the air inside the upper heat exchange tube, control the temperature difference between the air and the glass, and thus control the heat exchange rate.

[0083] Example 7

[0084] A heat exchange process for producing ink-coated glass, using the heat exchange furnace described in Example 1, includes the following steps:

[0085] 1) Turn on heating device 4 to preheat the heat exchange furnace;

[0086] 2) Turn on the exhaust fan 5 to allow outside air to flow from the air inlet of the upper heat exchange tube 2 to the air outlet of the upper heat exchange tube 2, and to be discharged from the exhaust port of the exhaust fan 5. The air flow in the heat exchange tube carries away the heat of the hot glass itself.

[0087] 3) Adjust the opening of the four regulating valves 6 respectively, thereby adjusting the air flow rate in the four sets of heat exchange tubes, and adjusting the heat exchange efficiency by adjusting the air flow rate.

[0088] Example 8

[0089] This embodiment provides an ink-coated glass production line, which includes four heating furnaces, two heat exchange furnaces, and three air-cooling devices. Glass passes sequentially through the four heating furnaces, two heat exchange furnaces, and three air-cooling devices along the conveying direction. Each heating furnace is equipped with a heating mechanism, which can be any type of heating mechanism commonly used in the art. The heat exchange furnaces are any type of heat exchange furnace described in the above embodiment. The air-cooling devices are any type of air-cooling devices commonly used in the art.

[0090] The heating temperatures of the four heating furnaces increase sequentially along the glass conveying direction, and the cooling air pressures of the three air-cooling devices increase sequentially along the glass conveying direction.

[0091] After printing with glass ink, the glass is heated in a furnace to fully sinter and fuse the ink with the glass, resulting in a high degree of sintering. Then, it is directly conveyed into a heat exchange furnace for heat exchange, and then cooled by an air-cooling device, which gives the glass low residual stress and high flatness.

[0092] This embodiment uses four heating furnaces, two heat exchange furnaces, and two air-cooling devices. Those skilled in the art should be able to set up any number of heating furnaces, any number of heat exchange furnaces, or any number of air-cooling devices according to different glass types, different glass thicknesses, and different production processes.

[0093] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application.

[0094] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A heat exchange furnace for ink glass production, comprising a furnace body and a glass conveying device arranged in the furnace body, characterized in that: The furnace body is provided with a plurality of heat exchange pipes, which extend along the glass conveying direction and are parallel to the glass conveying plane; the air inlet end of the heat exchange pipe is connected with the outside through an air inlet pipe, and the air outlet end of the heat exchange pipe is connected with the air inlet of an air extractor outside the furnace body; an adjusting valve is arranged on the air inlet side or air outlet side of the heat exchange pipe or inside the heat exchange pipe; the furnace body is provided with a heating device, which is arranged parallel to the glass conveying direction and on both sides of the furnace body in the width direction, and can supplement heat to both sides of the glass; The heat exchange pipe comprises an upper heat exchange pipe arranged above the glass conveying device, and a plurality of upper heat exchange pipes are arranged in one horizontal plane and are arranged at intervals in the width direction of the furnace body, and the upper heat exchange pipe is a circular pipe. The heat exchange pipe further comprises a plurality of lower heat exchange pipes arranged below the glass conveying device in the width direction of the furnace body, and the lower heat exchange pipe is a square pipe.

2. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The air inlet end of the heat exchange pipe is located on the inlet side of the furnace body, and the air outlet end of the heat exchange pipe is located on the outlet side of the furnace body.

3. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The air inlet end of the heat exchange pipe is located on the outlet side of the furnace body, and the air outlet end of the heat exchange pipe is located on the inlet side of the furnace body.

4. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The plurality of upper heat exchange pipes are divided into a plurality of groups, and the air outlet ends of the plurality of upper heat exchange pipes in each group are connected with the air extractor through an air outlet pipe arranged on the upper part.

5. The heat exchange furnace for ink glass production according to claim 4, characterized in that: An adjusting valve is arranged in the air outlet pipe.

6. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The diameter of the upper heat exchange pipe is 40-200 mm, the gap between the two adjacent upper heat exchange pipes is less than or equal to 200 mm, and the distance between the upper heat exchange pipe and the glass conveying device is 200-600 mm.

7. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The plurality of lower heat exchange pipes are divided into a plurality of groups, and the air outlet ends of the lower heat exchange pipes in each group are connected with the air extractor through an air outlet pipe arranged on the lower part.

8. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The heating device is arranged between the heat exchange pipe and the glass conveying device.

9. The heat exchange furnace for ink glass production according to claim 1, characterized in that: The air inlet end of the heat exchange pipe is provided with a heater for heating air.

10. An ink glass production heat exchange process characterized by, The heat exchange furnace of any one of claims 1-9 is adopted; The method comprises the following steps: 1) Start the heating device and preheat the heat exchange furnace; 2) Start the air extractor, so that the outside air flows from the air inlet end of the heat exchange pipe to the air outlet end, and is discharged from the air outlet of the air extractor, and the heat of the hot glass is taken away through the flow of air in the heat exchange pipe; 3) Adjust the opening degree of the adjusting valve to adjust the air flow in the heat exchange pipe, and adjust the heat exchange efficiency through the adjustment of the air flow.

11. An ink glass production line, characterized by, The method comprises the following steps:

12. The ink glass production line according to claim 11, characterized in that, The heating furnace is a plurality of heating furnaces, and the heating temperature of the plurality of heating furnaces gradually increases along the glass conveying direction.

13. The ink glass production line according to claim 11, characterized in that, The heat exchange furnace is a plurality of heat exchange furnaces.

14. The ink glass production line according to claim 11, characterized in that, The air cooling device is a plurality of air cooling devices, and the cooling air pressure of the plurality of air cooling devices gradually increases along the glass conveying direction.

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