A cold and hot air system applied to a glazing line

Abstract

The utility model relates to the technical field of ceramic tile processing, especially a cold and hot air system applied to glazing line, including roller way type kiln, air input module, air heat pump system and glazing line, the slow cooling area of roller way type kiln is equipped with heat exchange pipeline, one end of heat exchange pipeline is linked with air input module, and the other end is linked with air heat pump system, air input module is used for inputting external gas to heat exchange pipeline or air heat pump system, glazing line is equipped with air distribution pipeline, and the output end of air heat pump system is connected with cold and hot air output pipe, cold and hot air output pipe communicates with air distribution pipeline, air heat pump system still communicates with air input module, and the air outlet of air distribution pipeline is towards the brick body of glazing line, solves the problem of energy waste of the waste heat loss of the slow cooling area of roller way type kiln and maintains glazing line product seasonal environmental energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of ceramic tile processing technology, and in particular to a hot and cold air system applied to a glazing line. Background Technology

[0002] The roller kilns currently used in the ceramics industry lose approximately 30% of their heat due to waste heat, with about 20% of this loss occurring directly in the slow cooling section. Furthermore, the large temperature difference between winter and summer during the glazing process significantly impacts the drying process. To mitigate this influence, glaze drying kilns need to be installed to heat the products for the cold winter months, consuming fuel gas; alternatively, main fans are needed for cooling during the hot summer months, consuming electricity.

[0003] Therefore, in order to ensure that the products can adapt to the temperature of different seasons and meet the high-temperature firing requirements of the kiln, a large amount of energy is required, and the waste heat loss of the roller kiln is relatively large, resulting in energy waste. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this invention is to propose a hot and cold air system for glazing lines, which solves the problems of waste heat loss and energy waste in the slow cooling zone of roller kilns and high energy consumption in maintaining the adaptability of glazing line products to seasonal environments.

[0005] To achieve this objective, the present invention adopts the following technical solution: A hot and cold air system for a glazing line includes a roller kiln, an air input module, an air heat pump system, and a glazing line. The slow cooling zone of the roller kiln is equipped with a heat exchange pipe, which is used to exchange heat with the slow cooling zone of the roller kiln. One end of the heat exchange pipe is connected to the air input module, and the other end is connected to the air heat pump system. The air input module is used to input external gas into the heat exchange pipe or the air heat pump system; The glazing line is equipped with a distribution duct. The output end of the air heat pump system is connected to a hot and cold air output pipe. The hot and cold air output pipe is connected to the distribution duct. The air heat pump system is also connected to the air input module. The air heat pump system is used to heat the gas input through the heat exchange duct or cool the gas input through the air input module, and output the heated or cooled gas to the hot and cold air output pipe. The air outlet of the distribution duct faces the brick of the glazing line.

[0006] Preferably, the heat exchange pipe is made of silicon carbide.

[0007] Furthermore, the heat exchange pipe is a serpentine flow channel.

[0008] Preferably, the heat exchange pipe is located in the upper part of the slow cooling zone box of the roller kiln, and the distance between the heat exchange pipe and the upper surface of the brick passing through the slow cooling zone is 10cm.

[0009] Preferably, the distance between the air distribution duct and the upper surface of the brick of the glazed line is 10cm, and the gas in the air distribution duct is blown towards the brick of the glazed line through the air outlet of the air distribution duct.

[0010] Furthermore, the air distribution duct is provided with a plurality of air outlets, and an air direction adjustment component is provided at each air outlet. The air direction adjustment component includes an air guide groove, a plurality of air guide plates, and an adjustment handwheel. The air guide groove is located outside the air outlets, and a plurality of air guide plates are rotatably arranged inside the air guide grooves. The air guide plates are arranged to extend laterally along the air distribution duct. The adjustment handwheel is rotatably located outside the air guide grooves, and the rotating shaft of the adjustment handwheel is threadedly connected to the plurality of air guide plates. The rotation of the adjustment handwheel adjusts the angle of the air guide plates. The air direction adjustment component allows the gas in the air distribution duct to be blown towards the glazed bricks in the desired direction through the air outlets.

[0011] Preferably, the air heat pump system includes a four-way reversing valve, which is used to adjust the cooling or heating function of the air heat pump system.

[0012] Preferably, the diameter of the hot and cold air output pipe is larger than the diameter of the heat exchange pipe.

[0013] The technical solution provided by this utility model can include the following beneficial effects: This solution provides a hot and cold air system for glazing lines. A heat exchange pipe is installed in the slow cooling zone of the roller kiln to absorb the waste heat energy from the slow cooling zone. This waste heat is then reheated by an air heat pump system and delivered to the glazing line, thus heating the products. This effectively utilizes the waste heat from the slow cooling zone, reducing energy waste and lowering energy consumption. Furthermore, the air heat pump system can also be used to cool the input gas before delivering it to the glazing line, cooling the products and allowing them to adapt to seasonal changes. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of a distribution duct according to an embodiment of the present invention.

[0016] The components include: roller kiln 1, slow cooling zone 11, heat exchange pipe 12, air input module 2, air heat pump system 3, hot and cold air output pipe 31, four-way reversing valve 32, compressor station 33, glazing line 4, air distribution pipe 41, air guide trough 411, air guide plate 412, adjusting handwheel 413, rotating shaft 414, and lead screw 415. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "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. They 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 on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0020] like Figure 1 As shown, a hot and cold air system for a glazing line includes a roller kiln 1, an air input module 2, an air heat pump system 3, and a glazing line 4. The slow cooling zone 11 of the roller kiln 1 is provided with a heat exchange pipe 12. The heat exchange pipe 12 is used to exchange heat with the slow cooling zone 11 of the roller kiln 1. One end of the heat exchange pipe 12 is connected to the air input module 2, and the other end is connected to the air heat pump system 3. The air input module 2 is used to input external gas into the heat exchange pipe 12 or the air heat pump system 3; The glazing line 4 is provided with a distribution duct 41. The output end of the air heat pump system 3 is connected to a hot and cold air output pipe 31. The hot and cold air output pipe 31 is connected to the distribution duct 41. The air heat pump system 3 is also connected to the air input module 2. The air heat pump system 3 is used to heat the gas input through the heat exchange pipe 12 or cool the gas input through the air input module 2, and output the heated or cooled gas to the hot and cold air output pipe 31. The air outlet of the distribution duct 41 faces the brick body of the glazing line 4.

[0021] To ensure that the glazed products meet the requirements of subsequent inkjet printing and other processes, it is necessary to ensure that the glazed tiles are well-dryed and that the glaze layer adheres evenly to the body. However, low temperatures and relatively high humidity in winter slow down the drying process of the glazed tiles, while high temperatures and relatively low humidity in summer cause the glazed tiles to dry too quickly. Therefore, in winter, it is necessary to heat the tiles to accelerate drying, and in summer, it is necessary to cool the tiles to slow down the drying process. To solve the problems existing in the prior art, this utility model proposes a hot and cold air system for the glazing line, which uses an air heat pump system 3. The cooling or heating principle of the air heat pump system 3 is to utilize a small amount of... The electric power drives the compressor station 33 to perform work, establishing a system pressure difference. This enables the refrigerant in the air heat pump system 3 to undergo a cycle of evaporation and heat absorption, followed by compression, temperature increase, and condensation and heat release. Utilizing the heat transfer mechanism of the vapor compression cycle replaces direct energy conversion, effectively reducing energy consumption. Furthermore, a heat exchange pipe 12 is provided in the slow cooling zone 11 of the roller kiln 1. When it is necessary to heat the bricks on the glazing line in winter, gas enters the heat exchange pipe 12 through the air input module 2, exchanging heat with the slow cooling zone 11 of the roller kiln 1. This raises the temperature of the gas in the heat exchange pipe 12, and the gas after heat exchange enters the air heat pump system 3. The air heat pump system 3 further heats the gas, and the resulting hot air enters the air distribution pipe 41 through the hot and cold air output pipe 31, thereby blowing onto the bricks of the glazing line 4. This achieves the heating of the glazed products, ensuring that the temperature of the glazed products is increased in the cold winter environment, accelerating drying, and ensuring that the glaze layer of the bricks dries evenly, avoiding uneven moisture evaporation due to slow drying speed, which would affect product quality. In summer, when it is necessary to cool the glazed products, gas enters through the air input module 2, is cooled by the air heat pump system 3 to obtain cold air, and the cold air enters the air distribution pipe 41 through the hot and cold air output pipe 31, blowing onto the bricks of the glazing line 4. The glazing line 4 cools the bricks, slowing down the drying process and preventing cracking of the glaze layer due to excessive moisture evaporation, thus improving product quality. It also allows for heating and cooling according to different seasons, meeting the requirements of subsequent inkjet printing processes. The waste heat from the slow cooling zone 11 of the roller kiln 1 is collected through the heat exchange pipe 12 and converted into hot air to heat the glazing line products, achieving energy reuse of the waste heat from the slow cooling zone 11 of the roller kiln 1. Furthermore, it eliminates the need for a dedicated glaze drying kiln to heat the products. In summer, the air heat pump system 3 can output cool air, eliminating the need for additional fans or other equipment. This invention utilizes the heat from the slow cooling zone 11 of the roller kiln 1 at the glazing line 4, solving the problems of waste heat loss and energy waste in the slow cooling zone 11 of the roller kiln 1, and the high energy consumption required to maintain the glazing line products to adapt to seasonal environments.

[0022] Specifically, in winter, after heat exchange in the slow cooling zone 11 of the roller kiln 1, the gas temperature in the heat exchange pipe 12 can reach about 200°C. After secondary heating by the air heat pump system 3, hot air at 300°C is obtained to heat the bricks on the glazing line. Before entering the glazing line, the temperature of the bricks is 80-100°C. In summer, the overall indoor temperature is relatively high, which makes it difficult for the temperature of the bricks to drop significantly during the transportation of the glazing line. It is difficult to reduce the temperature of the bricks to the temperature that meets the production process standards before entering the subsequent inkjet printing stage without external cooling. Therefore, this utility model uses the air heat pump system 3 to cool the air at 25°C to obtain cold air at 10°C, thereby cooling the bricks on the glazing line, ensuring that the products on the glazing line can adapt to the seasonal environment, meet the drying requirements, and are beneficial to the subsequent inkjet printing process.

[0023] Specifically, the air input module 2 includes an air inlet and a fan. The fan draws in outside air from the air inlet. The air input module 2 is connected to the air heat pump system 3 and the heat exchange pipe 12, so as to input outside air into the heat exchange pipe 12 or the air heat pump system 3.

[0024] The air heat pump system 3 is a conventional air source heat pump unit in the temperature control system of the prior art. Its internal structure and connection method are common knowledge to those skilled in the art and will not be described in detail here.

[0025] Preferably, the heat exchange pipe 12 is made of silicon carbide.

[0026] Specifically, the heat exchange pipe 12 is made of silicon carbide, which has a thermal conductivity more than 5 times that of conventional stainless steel. This improves the heat exchange efficiency and allows the residual heat of the bricks in the slow cooling zone 11 of the roller kiln 1 to be transferred to the gas in the heat exchange pipe 12 through heat exchange, thereby significantly reducing the energy loss of the slow cooling zone 11 of the roller kiln 1.

[0027] Furthermore, the heat exchange pipe 12 is a serpentine flow channel.

[0028] Specifically, the heat exchange pipe 12 is a serpentine flow channel, which can significantly increase the total length of the heat exchange pipe 12 in the same space, thereby increasing the contact area between the gas in the heat exchange pipe 12 and the hot gas in the slow cooling zone 11 of the roller kiln 1. Furthermore, the gas flows through the heat exchange pipe 12 for a longer path, resulting in more sufficient heat exchange time and effectively improving heat exchange efficiency.

[0029] Preferably, the heat exchange pipe 12 is located in the upper part of the slow cooling zone 11 box of the roller kiln 1, and the distance between the heat exchange pipe 12 and the upper surface of the brick passing through the slow cooling zone 11 is 10cm.

[0030] Specifically, the heat exchange pipe 12 is made of silicon carbide, which gives it high temperature resistance and strong corrosion resistance. It can adapt to the working environment inside the slow cooling zone 11 of the roller kiln 1 and operate stably for a long time, ensuring the reliability of heat exchange. The heat exchange pipe 12 is located at the upper part of the slow cooling zone 11 of the roller kiln 1, 10cm away from the upper surface of the brick. This allows it to effectively collect the residual heat of the brick in the slow cooling zone 11 of the roller kiln 1, ensuring the high efficiency of heat exchange.

[0031] Preferably, the distance between the air distribution pipe 41 and the upper surface of the brick of the glazing line 4 is 10cm, and the gas of the air distribution pipe 41 is blown towards the brick of the glazing line 4 through the air outlet of the air distribution pipe 41.

[0032] Specifically, the gas obtained by cooling or heating through the air heat pump system 3 is blown onto the brick body of the glazing line 4 through the air outlet of the air distribution pipe 41, thereby regulating the temperature of the brick body and adapting to environmental changes.

[0033] The distance between the air distribution pipe 41 and the brick body of the glazing line 4 is limited to 10cm to ensure that the gas in the air distribution pipe 41 is more evenly distributed before reaching the surface of the brick body, thereby improving the heat exchange efficiency.

[0034] The air distribution duct 41 is provided with a plurality of air outlets, and an air direction adjustment component is provided at each air outlet. The air direction adjustment component includes an air guide trough 411, a plurality of air guide plates 412, and an adjustment handwheel 413. The air guide trough 411 is located outside the air outlets, and the inner wall of the air guide trough 411 is provided with a plurality of air guide plates 412. The air guide plates 412 are arranged to extend laterally along the air distribution duct 41. The adjustment handwheel 413 is rotatably located outside the air guide trough 411, and the rotating shaft of the adjustment handwheel 413 is threadedly connected to the plurality of air guide plates 412. The rotation of the adjustment handwheel 413 adjusts the angle of the air guide plates 412. The air direction adjustment component allows the gas from the air distribution duct 41 to be blown towards the glazed bricks in the desired direction through the air outlets.

[0035] Specifically, by adjusting the adjusting handwheel 413, the angles of several of the air guide plates 412 can be changed, so that the gas from the air distribution pipe 4141 is blown towards the brick body of the glazing line 4 at the required angle through the air outlet. The angle of the air guide plate 412 can be adjusted according to the direction of movement of the brick body, so that the gas is blown towards the brick body in the opposite direction, increasing the contact area between the gas and the brick body, improving the heat exchange efficiency, realizing temperature regulation of the glazing line products, and adapting to seasonal changes.

[0036] The adjusting handwheel 413 is threadedly connected to several of the air guide plates 412. Specifically, a rotating shaft 414 is fixed at the middle of both ends of the air guide plate 412. The rotating shaft 414 passes through the wall of the air guide groove 411. The rotating shaft of the adjusting handwheel 413 is a lead screw 415. The lead screw 415 is located outside the air guide groove 411, perpendicular to the air guide plate 412, and is threadedly connected to several of the rotating shafts 414. When the adjusting handwheel 413 is rotated, the lead screw 415 also rotates. Through the threaded engagement, the rotating shaft 414 rotates, thereby changing the angle of the air guide plate 412.

[0037] Preferably, the width of the air outlet is 5mm, which helps to increase the flow rate of the gas blown toward the brick and improve the heat exchange efficiency.

[0038] Preferably, the air heat pump system 3 includes a four-way reversing valve 32, which is used to adjust the cooling or heating function of the air heat pump system 3.

[0039] Specifically, to ensure that the air heat pump system 3 can achieve both cooling and heating functions, the air heat pump system 3 includes a four-way reversing valve 32. The four-way reversing valve 32 can adjust the operating direction of the air heat pump system 3. When it is necessary to switch from heating to cooling, the four-way reversing valve 32 is activated, changing the operating direction of the refrigerant in the air heat pump system 3, thereby switching the air heat pump system 3 to the cooling function and cooling the gas input from the air input module 2.

[0040] Specifically, the control of the four-way reversing valve 32 is based on PLC-led automatic collaborative control, with manual operation as an auxiliary method. The control of the four-way reversing valve 32 is the conventional control connection and control logic in existing air source heat pump units. The relevant electrical connections and control methods will not be described in detail here.

[0041] In addition, the air heat pump system 3 also includes a compressor station 33, which is connected to the heat exchange pipe 12. The compressor station 33 is used to heat the gas in the heat exchange pipe 12. The compressor station 33 is connected to the hot and cold air output pipe 31 to realize the heating and output of the gas.

[0042] Preferably, the diameter of the hot and cold air output pipe 31 is larger than the diameter of the heat exchange pipe 12.

[0043] Specifically, the smaller diameter of the heat exchange pipe 12 helps to increase the flow rate of the gas flowing inside it and reduce the resistance to heat transfer. The larger diameter of the hot and cold air output pipe 31 reduces the gas flow rate, allowing the fully heat-exchanged gas to be smoothly delivered to various positions of the air distribution pipe 41, improving the temperature consistency at various positions of the air distribution pipe 41, and enabling better regulation of the temperature of the glazing line products.

[0044] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A hot and cold air system for use in a glazing line, characterized in that: This includes roller kilns, air input modules, air heat pump systems, and glazing lines; The slow cooling zone of the roller kiln is equipped with a heat exchange pipe. The heat exchange pipe is used to exchange heat with the slow cooling zone of the roller kiln. One end of the heat exchange pipe is connected to the air input module, and the other end is connected to the air heat pump system. The air input module is used to input external gas into the heat exchange pipe or the air heat pump system; The glazing line is equipped with a distribution duct. The output end of the air heat pump system is connected to a hot and cold air output pipe. The hot and cold air output pipe is connected to the distribution duct. The air heat pump system is also connected to the air input module. The air heat pump system is used to heat the gas input through the heat exchange duct or cool the gas input through the air input module, and output the heated or cooled gas to the hot and cold air output pipe. The air outlet of the distribution duct faces the brick of the glazing line.

2. The hot and cold air system for a glazing line according to claim 1, characterized in that: The heat exchange pipe is made of silicon carbide.

3. A hot and cold air system for a glazing line according to claim 2, characterized in that: The heat exchange pipe is a serpentine flow channel.

4. A hot and cold air system for a glazing line according to claim 2, characterized in that: The heat exchange pipe is located in the upper part of the slow cooling zone box of the roller kiln, and the distance between the heat exchange pipe and the upper surface of the bricks passing through the slow cooling zone is 10cm.

5. A hot and cold air system for a glazing line according to claim 1, characterized in that: The distance between the air distribution duct and the upper surface of the brick on the glazing line is 10cm, and the gas in the air distribution duct is blown towards the brick on the glazing line through the air outlet of the air distribution duct.

6. A hot and cold air system for a glazing line according to claim 5, characterized in that: The air distribution duct is provided with a plurality of air outlets, and an air direction adjustment component is provided at each air outlet. The air direction adjustment component includes an air guide groove, a plurality of air guide plates, and an adjustment handwheel. The air guide groove is located outside the air outlets, and the plurality of air guide plates are rotatably arranged inside the air guide grooves. The air guide plates are arranged to extend laterally along the air distribution duct. The adjustment handwheel is rotatably located outside the air guide grooves, and the rotating shaft of the adjustment handwheel is threadedly connected to the plurality of air guide plates. The rotation of the adjustment handwheel adjusts the angle of the air guide plates. The air direction adjustment component allows the gas in the air distribution duct to be blown towards the glazed bricks in the desired direction through the air outlets.

7. A hot and cold air system for a glazing line according to claim 1, characterized in that: The air heat pump system includes a four-way reversing valve, which is used to adjust the cooling or heating function of the air heat pump system.

8. A hot and cold air system for a glazing line according to claim 1, characterized in that: The diameter of the hot and cold air output pipe is larger than the diameter of the heat exchange pipe.

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