Novel tile sintering tunnel kiln
By installing an adjustment mechanism and a humidity sensor inside the exhaust pipe, the problem of overheating of high-temperature flue gas inside the exhaust pipe is solved, achieving efficient and energy-saving flue gas heating control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LESHAN KENANTAI NEW MATERIALS CO LTD
- Filing Date
- 2025-01-15
- Publication Date
- 2026-05-15
AI Technical Summary
In existing technologies, the high-temperature flue gas in the roasting kiln continues to be heated even after the humidity in the exhaust pipe reaches a preset value, resulting in energy waste.
The flow rate of high-temperature flue gas is regulated by an adjustment mechanism. The humidity of the flue gas in the exhaust pipe is detected by a humidity sensor. The flow rate of the flue gas is controlled by the baffle and gear transmission system of the adjustment mechanism to avoid overheating and save energy.
It enables automatic adjustment of flue gas flow rate based on the humidity of the flue gas in the exhaust pipe, avoiding energy waste and improving energy utilization efficiency.
Smart Images
Figure CN224246693U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building materials production technology, specifically to a novel tunnel kiln for tile sintering. Background Technology
[0002] Tiles are a common roofing material used in construction. They need to be fired at high temperatures to improve their strength and durability. In the production process of tiles, a tunnel kiln is a type of kiln used to fire building materials such as bricks and tiles. It consists of a drying kiln and a firing kiln. The drying kiln is used to dry the tile blanks, and the dried tile blanks are sent to the firing kiln for firing. The tunnel kiln is an indispensable piece of equipment in tile production.
[0003] Chinese utility model patent CN218994086 U discloses a tunnel kiln for sintering bricks, comprising a firing kiln (1) and a drying kiln (2) separated by a kiln wall (3). The drying kiln (2) is equipped with an exhaust fan (6), which is connected to an exhaust pipe (7) and a flue gas treatment facility (8). The firing kiln (1) is equipped with a heating fan (4), which is connected to a heat exhaust pipe (5). The heat exhaust pipe (5) passes through the kiln wall (3) and is connected to a heat exhaust branch pipe (9). The heat exhaust branch pipe (9) is connected to circulating flues (10) located on both sides of the drying kiln (2). A heating branch pipe (11) is also connected to the heat exhaust pipe (5), and the heating branch pipe (11) is connected to a heating and insulation device located on the exhaust pipe (7). The high-temperature flue gas in the roasting kiln is heated by a heating and insulation device to heat the flue gas in the exhaust pipe. This multi-purpose use of heat makes great use of the heat in the roasting kiln and saves production costs to a certain extent.
[0004] The above technical solution has the following drawbacks: When using the high-temperature flue gas in the roasting kiln to heat the flue gas in the exhaust pipe, when the humidity in the exhaust pipe reaches the preset value, the heating and insulation device will continue to heat the flue gas in the exhaust pipe, which causes a certain degree of energy waste. Summary of the Invention
[0005] This invention provides a novel tunnel kiln for tile sintering, which can solve the above-mentioned technical problems.
[0006] This utility model is achieved through the following technical solution:
[0007] A novel tunnel kiln for tile sintering includes a heating fan, heating pipes, a dehumidification fan, a dehumidification pipe, heating pipes, and a regulating mechanism for adjusting the flow rate of high-temperature flue gas entering the heating pipes.
[0008] One end of the exhaust pipe is connected to the exhaust fan, and the other end of the exhaust pipe is connected to the flue gas treatment mechanism. The outer surface of the exhaust pipe is covered with a heat insulation layer. A humidity sensor is installed inside the exhaust pipe to detect the humidity of the flue gas inside. A heating pipe is coaxially installed inside the exhaust pipe. Several heat-conducting fins are evenly distributed along the circumference of the outer wall of the heating pipe. The heating fan is connected to the heating pipe. The heating pipe is equipped with heating branch pipes, which are connected to the heating pipes.
[0009] The adjusting mechanism includes a rotating shaft, a motor, a connecting rod, a first bevel gear, a second bevel gear, a first baffle, and a second baffle. The first baffle is located inside the heating tube and is coaxially arranged with it. The rotating shaft is coaxially arranged inside the heating tube and is rotatably connected to both the heating tube and the first baffle. The second baffle is mounted on the rotating shaft and is located to one side of the first baffle. Both the first and second baffles are provided with several through holes that allow high-temperature flue gas to pass through. One end of the connecting rod is connected to the drive end of the motor, and the other end of the connecting rod extends into the heating tube and is connected to the first bevel gear. The second bevel gear is connected to one end of the rotating shaft, and the first bevel gear meshes with the second bevel gear.
[0010] Furthermore, there are multiple first baffles arranged at intervals along the axial direction of the heating tube inside it, and the number of second baffles is the same as the number of first baffles.
[0011] Furthermore, it also includes a spiral connecting pipe, the first end of which is connected to the heating branch pipe, and the other end of which is connected to the vent pipe and connected along its tangent.
[0012] Furthermore, several heat-conducting fins are spirally distributed on the outer wall of the heating tube.
[0013] Furthermore, the insulation layer is an aluminum silicate cotton insulation layer.
[0014] Furthermore, the two ends of the heating tube are connected to the two ends of the exhaust pipe via flanges.
[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0016] The heating branch pipe receives high-temperature flue gas from the kiln through the heating pipeline to heat the flue gas in the exhaust pipe. The exhaust pipe is covered with an insulation layer to reduce heat loss during the transport of the flue gas. The flow rate of the high-temperature flue gas entering the heating pipe is adjusted by regulating the alignment of the through holes of the first and second baffles. When heating of the flue gas in the exhaust pipe is required, the through holes of the first and second baffles are fully aligned, allowing the maximum flow rate of high-temperature flue gas to enter the heating pipe. When the humidity sensor detects that the humidity of the flue gas in the exhaust pipe has reached a preset value, the motor is started. Through the transmission of the first and second bevel gears, the second baffle on the rotating shaft is rotated. The flow rate of the flue gas entering the heating pipe is adjusted by changing the alignment of the through holes of the first and second baffles according to the humidity of the flue gas in the exhaust pipe, avoiding overheating, reducing waste of high-temperature flue gas, and saving energy. Attached Figure Description
[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 is a schematic diagram of the structure of a novel tile sintering tunnel kiln according to an embodiment of the present invention;
[0019] Figure 2 is a schematic diagram of the flow regulation mechanism of an embodiment of this utility model.
[0020] The attached diagram shows the markings and corresponding component names:
[0021] 10-Roasting kiln, 11-Heating fan, 12-Heating pipeline, 121-Heating branch pipe;
[0022] 20-Drying kiln, 21-Exhaust fan, 22-Spiral connecting pipe, 23-Exhaust pipe, 24-Heating pipe, 241-Heat conductive plate;
[0023] 30-Motor, 31-Connecting rod, 311-First bevel gear, 32-Rotating shaft, 321-Second bevel gear, 33-First baffle, 34-Second baffle, 331-Through hole;
[0024] 40 - Flue gas treatment unit. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model. Example
[0026] A novel tunnel kiln for tile sintering includes a heating fan 11, a heating pipe, an exhaust fan 21, an exhaust pipe, a heating pipe 24, and a regulating mechanism for adjusting the flow rate of high-temperature flue gas entering the heating pipe 24. One end of the exhaust pipe is connected to the exhaust fan 21, and the other end is connected to a flue gas treatment mechanism 40. The outer surface of the exhaust pipe is covered with an insulation layer, for example, an aluminum silicate cotton insulation layer. Aluminum silicate cotton has high temperature resistance and can withstand extremely high temperatures, with a maximum operating temperature of 1000℃ to 1500℃. This makes it very suitable for thermal insulation in high-temperature environments. It also has the advantage of low thermal conductivity and excellent thermal insulation performance. A humidity sensor is installed inside the exhaust pipe to detect the humidity of the flue gas inside.
[0027] A heating pipe 24 is coaxially arranged inside the exhaust pipe. For example, the two ends of the heating pipe 24 are connected to the flanges at both ends of the exhaust pipe. It has good strength and sealing performance and can withstand high pressure. The heating pipe 24 is connected to the heating branch pipe 121 to receive high-temperature flue gas from the kiln 10.
[0028] The outer wall of the heating tube 24 is uniformly distributed with several heat-conducting fins 241 along its circumference. The heat-conducting fins 241 can increase the heat dissipation area of the heating tube 24. Due to the increase in heat dissipation area, the thermal efficiency is improved, making the heating process faster and more efficient. For example, several heat-conducting fins 241 are spirally arranged around the outer wall of the heating tube 24. The spirally distributed heat-conducting fins 241 can guide the flue gas to flow along the spiral path, making the flow of flue gas in the exhaust pipe more complex, increasing the contact area and contact time between the flue gas and the heat-conducting fins 241, thereby improving the heat exchange efficiency of the flue gas. For example, one end of the heating tube 24 is connected to an exhaust pipe, which can be connected to the drying kiln 20 to recover and utilize the waste heat in the heating tube 24, saving energy.
[0029] The heating fan 11 is connected to the heating pipeline to transport the high-temperature flue gas in the roasting kiln 10 to the drying kiln 20. The heating pipeline is equipped with a heating branch pipe 121, which is used to distribute part of the high-temperature flue gas received from the roasting kiln 10 to the heating branch pipe 121. The heating branch pipe 121 is connected to the heating pipe 24, and the heating pipe 24 receives the high-temperature flue gas inside as a heating heat source.
[0030] The adjusting mechanism includes a rotating shaft 32, a motor 30, a connecting rod 31, a first bevel gear 311, a second bevel gear 321, a first baffle 33, and a second baffle 34. The first baffle 33 is located inside the heating tube 24 and is coaxially arranged with it. The rotating shaft 32 is coaxially arranged inside the heating tube 24, and the rotating shaft 32 is rotatably connected to both the heating tube 24 and the first baffle. The second baffle 34 is mounted on the rotating shaft 32 and is located on one side of the first baffle 33. Both the first baffle 33 and the second baffle 34 are provided with several through holes 331 that allow high-temperature flue gas to pass through. For example, the side of the first baffle facing the second baffle is provided with an annular groove, and the side of the second baffle facing the first baffle is provided with a slider corresponding to the groove, which increases the stability of the second baffle when rotating and also reduces the gap between the first and second baffles, improving the sealing performance. When the through holes 331 of the first baffle and the through holes 331 of the second baffle are aligned... When completely offset, it more effectively prevents high-temperature flue gas from entering the heating tube 24. One end of the connecting rod 31 is connected to the drive end of the motor 30, and the other end of the connecting rod 31 extends into the heating tube 24 and is connected to the first bevel gear 311. The second bevel gear 321 is connected to one end of the rotating shaft 32, and the first bevel gear 311 meshes with the second bevel gear 321.
[0031] Heating branch pipe 121 receives high-temperature flue gas from the kiln 10 from the heating pipeline to heat the flue gas in the exhaust pipe. The exhaust pipe is covered with an insulation layer to reduce heat loss during the transport of the flue gas. The flow rate of high-temperature flue gas entering the heating pipe 24 is adjusted by adjusting the alignment of the through holes 331 of the first baffle and the second baffle. When heating of the flue gas in the exhaust pipe is required, the through holes 331 of the first and second baffles are fully aligned, allowing the maximum flow rate of high-temperature flue gas to enter the heating pipe 24 through the through holes 331 to heat the flue gas in the exhaust pipe. When the humidity sensor detects that the humidity of the flue gas in the exhaust pipe has reached a preset value, the motor 30 is started. Through the transmission of the first bevel gear 311 and the second bevel gear 321, the second baffle on the rotating shaft 32 is rotated. The flow rate is adjusted according to the humidity of the flue gas in the exhaust pipe by changing the through holes 331 of the first and second baffles. The alignment method is used to regulate the flow of flue gas entering the heating tube 24, avoiding overheating, reducing the waste of high-temperature flue gas, and saving energy.
[0032] In another embodiment, there are multiple first baffles spaced apart along the axial direction of the heating tube 24, and the number of second baffles is the same as the number of first baffles. By setting multiple first and second baffles, the flow velocity of the high-temperature flue gas in the heating tube 24 can be reduced under the obstruction of the multiple baffles, the residence time of the high-temperature flue gas can be increased, and there are more heat exchange opportunities between the inner wall of the heating tube 24 and the high-temperature flue gas, so that the heat energy in the high-temperature flue gas can be more fully transferred to the flue gas in the exhaust pipe through the heating tube 24, thereby improving the utilization rate of the high-temperature flue gas and saving energy.
[0033] In another embodiment, a spiral connecting pipe 22 is also included. The first end of the spiral connecting pipe 22 is connected to the heating branch pipe 121, and the other end of the spiral connecting pipe 22 is connected to the exhaust pipe and enters along its tangent. The flue gas enters the exhaust pipe and flows in a spiral shape, increasing the residence time of the flue gas in the exhaust pipe and improving the heat exchange rate.
[0034] In another embodiment, a controller is also included. The input of the controller is connected to a humidity sensor, and the output of the controller is connected to a motor 30. When the humidity in the exhaust pipe reaches a preset value, the controller sends a signal to the motor 30. The motor 30 drives the connecting rod 31, which in turn drives the rotating shaft 32 to rotate the second baffle through gear transmission. This causes the through hole 331 of the second baffle to partially overlap or completely offset from the through hole 331 of the first baffle, reducing the flow rate of high-temperature flue gas entering the heating tube 24, thereby avoiding overheating and improving energy efficiency. With this configuration, the flue gas flow rate can be automatically adjusted according to the real-time humidity in the exhaust pipe, achieving precise control, reducing reliance on manual operation, and lowering the complexity of operation and the possibility of human error.
[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A novel tunnel kiln for tile sintering, characterized in that, It includes a heating fan, heating pipes, a dehumidifying fan, a dehumidifying pipe, a heating pipe, and a regulating mechanism for adjusting the flow rate of high-temperature flue gas entering the heating pipe. One end of the exhaust pipe is connected to the exhaust fan, and the other end of the exhaust pipe is connected to the flue gas treatment mechanism. The outer surface of the exhaust pipe is covered with a heat insulation layer. A humidity sensor for detecting the humidity of the flue gas inside the exhaust pipe is installed inside the exhaust pipe. A heating pipe is coaxially installed inside the exhaust pipe. Several heat-conducting fins are evenly distributed along the circumference of the outer wall of the heating pipe. The heating fan is connected to the heating pipe. The heating pipe is provided with a heating branch pipe, which is connected to the heating pipe. The adjusting mechanism includes a rotating shaft, a motor, a connecting rod, a first bevel gear, a second bevel gear, a first baffle, and a second baffle. The first baffle is located inside the heating tube and is coaxially arranged therewith. The rotating shaft is coaxially arranged inside the heating tube and is rotatably connected to both the heating tube and the first baffle. The second baffle is disposed on the rotating shaft and located on one side of the first baffle. Both the first and second baffles are provided with several through holes that allow high-temperature flue gas to pass through. One end of the connecting rod is connected to the drive end of the motor, and the other end of the connecting rod extends into the heating tube and is connected to the first bevel gear. The second bevel gear is connected to one end of the rotating shaft, and the first bevel gear meshes with the second bevel gear.
2. The novel tile sintering tunnel kiln according to claim 1, characterized in that, The number of first baffles is multiple and they are spaced apart inside the heating tube along the axial direction. The number of second baffles is the same as the number of first baffles.
3. A novel tile sintering tunnel kiln according to claim 1 or 2, characterized in that, It also includes a spiral connecting pipe, the first end of which is connected to the heating branch pipe, and the other end of which is connected to the vent pipe and connected along its tangent.
4. A novel tile sintering tunnel kiln according to claim 3, characterized in that, Several heat-conducting fins are spirally distributed on the outer wall of the heating tube.
5. A novel tile sintering tunnel kiln according to claim 1, characterized in that, The insulation layer is an aluminum silicate cotton insulation layer.
6. A novel tile sintering tunnel kiln according to claim 1, characterized in that, The two ends of the heating tube are connected to the two end flanges of the dehumidification tube.