Air supply device of tunnel kiln

Abstract

The utility model relates to the technical field of tunnel kiln air supply, and provides a tunnel kiln air supply device which comprises a tunnel kiln, the upper end of the tunnel kiln is fixedly provided with an air supply device, the air supply device comprises an air supply pipe, the other end of the air supply pipe is fixedly provided with a connecting pipe, and the outer side of the connecting pipe is fixedly provided with a plurality of groups of first branch pipes. The lower end of the connecting pipe is fixedly provided with a plurality of sets of second branch pipes, the other ends of the first branch pipes communicate with the lower end of the tunnel kiln, the other ends of the second branch pipes communicate with the upper end of the tunnel kiln, and a plurality of sets of buffer cavity assemblies are fixedly installed in the connecting pipe. Air entering the air supply pipe is dispersed into the multiple sets of first branch pipes and the multiple sets of second branch pipes through the connecting pipe, and air flowing into the connecting pipe is treated through the buffer cavity assembly, so that the air flows into the multiple sets of first branch pipes and the multiple sets of second branch pipes more evenly.

Description

Technical Field

[0001] This utility model relates to the field of tunnel kiln air supply technology, and in particular to a tunnel kiln air supply device. Background Technology

[0002] As a modern continuous firing thermal equipment, the tunnel kiln occupies a pivotal position in the field of refractory material firing production. Its overall structure is shaped like a long tunnel and generally consists of three main parts: a preheating zone, a firing zone, and a cooling zone. This unique structural design allows materials to move continuously along a specific track inside the kiln, undergoing a series of key processes such as preheating, high-temperature firing, and cooling, thereby achieving efficient and continuous production operations.

[0003] A Chinese patent with publication number CN212778603U discloses a tunnel kiln air supply device. In use, a blower operates to deliver air to the air box, which then enters the air supply duct through the air outlet pipe connected to the upper end of the air box. The air is then delivered to the interior of the tunnel kiln body through the air supply duct. When it is necessary to increase the number of air inlets or the number of air inlets, the end cap is opened to open the air inlet. Opening the end cap causes the cylinder output to push the connecting rod downward, causing the branch pipe port to move down and the corrugated pipe to stretch. The lower end of the branch pipe port is connected to the air inlets on both sides of the upper end of the tunnel kiln body. Air is delivered to the interior of the tunnel kiln body through the lower sides of the air supply duct and the branch pipe port, thereby increasing the number of air supply ports and positions, making it easier to adjust and use.

[0004] Regarding the aforementioned technologies, during the operation of traditional tunnel kilns, due to the natural upward movement of hot flue gas, the upper part of the kiln often experiences a higher temperature and the lower part a lower temperature, resulting in a significant temperature stratification. This uneven temperature causes the materials to be heated inconsistently during the roasting process, affecting the consistency of product quality. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a tunnel kiln air supply device to solve the problem that due to the natural rising characteristics of hot flue gas, the upper part of the kiln is often hotter and the lower part is colder, resulting in obvious temperature stratification. This uneven temperature will cause the material to be heated inconsistently during the roasting process.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a tunnel kiln air supply device, including a tunnel kiln, with an air supply device fixedly installed at the upper end of the tunnel kiln. The air supply device includes an air supply pipe, one end of which is fixedly connected to a fan, and the other end of which is fixedly installed with a connecting pipe. Multiple sets of first branch pipes are fixedly installed on the outside of the connecting pipe, one end of each first branch pipe communicating with the inside of the connecting pipe. Multiple sets of second branch pipes are fixedly installed at the lower end of the connecting pipe, one end of each second branch pipe communicating with the inside of the connecting pipe, the other end of each first branch pipe communicating with the lower end of the tunnel kiln, and the other end of each second branch pipe communicating with the upper end of the tunnel kiln. Multiple sets of buffer chamber assemblies are fixedly installed inside the connecting pipe, and these buffer chamber assemblies are connected to the first and second branch pipes. When air supply is required inside the tunnel kiln, the fan is started to direct air through the air supply pipe. The air entering the air supply pipe is then dispersed through the connecting pipe to the multiple sets of first branch pipes. In the branch pipes and multiple sets of second branch pipes, the air flowing into the connecting pipes is processed by the buffer chamber assembly, making the air flow more evenly into the multiple sets of first branch pipes and multiple sets of second branch pipes. The air from the second branch pipes is used to supply air to the top of the tunnel kiln to ensure that the top area receives air evenly, making the temperature field at the top more uniform. The air from the first branch pipes supplies air to the bottom area of ​​the tunnel kiln. In conjunction with the second branch pipes, it can achieve the function of simultaneously supplying air to the top and bottom of the tunnel kiln. Inside the tunnel kiln, the hot flue gas will rise naturally, and the air supplied from the bottom can agitate the originally relatively still airflow at the bottom of the kiln, causing it to rise and mix fully with the rising hot flue gas. In this way, the temperature stratification phenomenon that may exist in the kiln is broken, the temperature difference between the upper and lower parts of the kiln is reduced, the uniformity of heat exchange is promoted, and a more stable and uniform temperature environment is provided for the materials in the tunnel kiln, which is conducive to improving product quality and production efficiency.

[0007] Preferably, one end of the air supply pipe is fixedly connected to the fan by bolts, and the other end of the air supply pipe is fixedly connected to the connecting pipe by bolts. The air supply pipe is fixed to the fan by bolts to output air power, and the air supply pipe is fixed to the connecting pipe by the other end of the air supply pipe to ensure the stability of air power transmission.

[0008] Preferably, the diameter of the air supply duct is smaller than the diameter of the connecting duct. Because the diameter of the air supply duct is smaller than the diameter of the connecting duct, the air can be distributed more evenly to the multiple sets of first branch ducts and multiple sets of second branch ducts when it flows through it.

[0009] Preferably, a baffle plate is fixedly installed at the connection between the air supply duct and the connecting duct. The air flows at high speed in the air supply duct and after reaching the connecting duct, the air is evenly distributed to each of the first branch ducts and the second branch ducts due to the diversion effect of the connecting duct and the baffle plate.

[0010] Preferably, the buffer chamber assembly includes a buffer shell. Two sets of exhaust holes are provided on the outer side of the buffer shell, connected to a first branch pipe. An exhaust hole is provided at the lower end of the buffer shell, connected to a second branch pipe. Barrier rings are fixedly installed at both ends of the buffer shell. Connecting frames are fixedly installed inside the barrier rings. Fan blades are rotatably installed on the opposite sides of the two sets of connecting frames. After being diverted by the barrier plates, the air flows into the first and second branch pipes through the two sets of exhaust holes in the buffer shell. When air enters the buffer shell, it first enters the buffer shell, forming a brief residence and buffer zone within it. As the air enters the buffer shell through the connecting pipe, it drives the fan blades to rotate, reducing the airflow speed and making the pressure distribution more uniform. Then, the airflow smoothly flows from the buffer shell into the first and second branch pipes, reducing airflow fluctuations and turbulence, making the air supply more stable, and helping to improve the temperature uniformity inside the tunnel kiln.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model proposes a tunnel kiln air supply device. When air supply is required inside the tunnel kiln, a fan is activated to send air through the air supply pipe. The air entering the air supply pipe is then distributed into multiple sets of first branch pipes and multiple sets of second branch pipes via connecting pipes. The air flowing into the connecting pipes is processed by a buffer chamber assembly, making the air flow more evenly into the multiple sets of first and second branch pipes. The air through the second branch pipes supplies air to the top of the tunnel kiln to ensure that the top area receives air evenly, making the temperature field at the top more uniform. The air through the first branch pipes... By supplying air to the bottom area of ​​the tunnel kiln in conjunction with the second branch pipe, air can be supplied to both the top and bottom of the tunnel kiln simultaneously. Inside the tunnel kiln, the hot flue gas will rise naturally, while the air supplied from the bottom can agitate the relatively still airflow at the bottom of the kiln, causing it to rise and mix thoroughly with the rising hot flue gas. In this way, the temperature stratification that may have existed inside the kiln is broken, the temperature difference between the upper and lower parts of the kiln is reduced, and the uniformity of heat exchange is promoted. This provides a more stable and uniform temperature environment for the materials inside the tunnel kiln, which is conducive to improving product quality and production efficiency. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0014] Figure 1 The schematic diagram illustrates the overall structure according to one embodiment of the present invention. Figure 1 ;

[0015] Figure 2The schematic diagram illustrates the overall structure according to one embodiment of the present invention. Figure 2 ;

[0016] Figure 3 The schematic diagram shows a structural diagram of an air supply device according to one embodiment of the present invention;

[0017] Figure 4 The schematic diagram shows the internal structure of the connecting pipe according to one embodiment of the present invention;

[0018] Figure 5 The schematic diagram shows a three-dimensional structural view of a buffer cavity assembly according to one embodiment of the present invention;

[0019] Figure 6 The schematic diagram shows the internal structure of a buffer cavity assembly according to one embodiment of the present invention.

[0020] The following are the labels in the diagram: 1. Tunnel kiln; 2. Air supply device; 21. Air supply pipe; 211. Baffle plate; 22. Bolt; 23. Connecting pipe; 231. Buffer chamber assembly; 2311. Buffer shell; 2312. Baffle ring; 2313. Connecting frame; 2314. Fan blade; 2315. Exhaust port one; 2316. Exhaust port two; 24. First branch pipe; 25. Second branch pipe. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0023] According to one embodiment of the present invention, in conjunction with Figure 1-4The diagram illustrates a tunnel kiln air supply device, comprising a tunnel kiln 1. An air supply device 2 is fixedly installed at the upper end of the tunnel kiln 1. The air supply device 2 includes an air supply pipe 21, one end of which is fixedly connected to a fan, and the other end of which is fixedly installed with a connecting pipe 23. Multiple sets of first branch pipes 24 are fixedly installed on the outer side of the connecting pipe 23, one end of which communicates with the interior of the connecting pipe 23. Multiple sets of second branch pipes 25 are fixedly installed at the lower end of the connecting pipe 23, one end of which communicates with the interior of the connecting pipe 23. The other end of the first branch pipes 24 communicates with the lower end of the tunnel kiln 1, and the other end of the second branch pipes 25 communicates with the upper end of the tunnel kiln 1. Multiple sets of buffer chamber assemblies 231 are fixedly installed inside the connecting pipe 23, and these buffer chamber assemblies 231 communicate with the first branch pipes 24 and the second branch pipes 25. When air supply is required inside the tunnel kiln 1, the fan is activated to direct air through the air supply pipe 21. The air entering the air supply pipe 21 is then dispersed through the connecting pipe 23 to... In the multiple sets of first branch pipes 24 and multiple sets of second branch pipes 25, the air flowing into the connecting pipe 23 is processed by the buffer chamber assembly 231, so that the air flows into the multiple sets of first branch pipes 24 and multiple sets of second branch pipes 25 more evenly. The air through the second branch pipes 25 is used to supply air to the top of the tunnel kiln 1 to ensure that the top area can receive air evenly, making the temperature field at the top more uniform. The air through the first branch pipes 24 supplies air to the bottom area of ​​the tunnel kiln 1. In conjunction with the second branch pipes 25, the function of simultaneously supplying air to the top and bottom of the tunnel kiln is realized. In the tunnel kiln 1, the hot flue gas will rise naturally, and the air supplied from the bottom can stir the originally relatively still airflow at the bottom of the kiln, causing it to rise and mix fully with the rising hot flue gas. In this way, the temperature stratification phenomenon that may exist in the kiln is broken, the temperature difference between the upper and lower parts of the kiln is reduced, the uniformity of heat exchange is promoted, and a more stable and uniform temperature environment is provided for the materials in the tunnel kiln, which is conducive to improving product quality and production efficiency.

[0024] Combination Figure 2-3 As shown, one end of the air supply pipe 21 is fixedly connected to the fan by bolt 22, and the other end of the air supply pipe 21 is fixedly connected to the connecting pipe 23 by bolt 22. The air supply pipe 21 is fixed to the fan by bolt 22 to output air power, and the other end of the air supply pipe 21 is fixed to the connecting pipe 23 to ensure the stability of air power transmission.

[0025] Combination Figure 2-3 As shown, the diameter of the air supply pipe 21 is smaller than the diameter of the connecting pipe 23. Because the diameter of the air supply pipe 21 is smaller than the diameter of the connecting pipe 23, the air can be distributed more evenly to the multiple sets of first branch pipes 24 and multiple sets of second branch pipes 25 when it flows through it.

[0026] Combination Figure 2-4As shown, a baffle plate 211 is fixedly installed at the connection between the air supply pipe 21 and the connecting pipe 23. The air flows at high speed in the air supply pipe 21. After reaching the connecting pipe 23, due to the diversion effect of the connecting pipe 23 and the baffle plate 211, the air is evenly distributed to each of the first branch pipes 24 and the second branch pipes 25.

[0027] Combination Figure 5-6 As shown, the buffer chamber assembly 231 includes a buffer shell 2311. Two sets of exhaust holes 2315 are provided on the outer side of the buffer shell 2311, and these two sets of exhaust holes 2315 are connected to the first branch pipe 24. An exhaust hole 2316 is provided at the lower end of the buffer shell 2311, and this exhaust hole 2316 is connected to the second branch pipe 25. Barrier rings 2312 are fixedly installed at both ends of the buffer shell 2311. Connecting brackets 2313 are fixedly installed inside the barrier rings 2312. Fan blades 2314 are rotatably installed on the opposite sides of the two sets of connecting brackets 2313. After the air is diverted by the barrier plate 211, it passes through the two branches in the buffer shell 2311. The exhaust vents 2315 and 2316 flow into the first branch pipe 24 and the second branch pipe 25. When the air enters the buffer shell 2311, the airflow first enters the buffer shell 2311, forming a brief residence and buffer zone inside the buffer shell 2311. As the airflow enters the buffer shell 2311 through the connecting pipe 23, it drives the fan blade 2314 to rotate, which reduces the airflow speed and makes the pressure distribution more uniform. Then, the airflow flows smoothly from the buffer shell 2311 into the first branch pipe 24 and the second branch pipe 25, reducing the fluctuation and turbulence of the airflow, making the air supply more stable, and helping to improve the temperature uniformity inside the tunnel kiln 1.

[0028] In this embodiment, when the blower is started to supply air to the inside of the tunnel kiln 1, the air enters through the air supply pipe 21. Because the diameter of the air supply pipe 21 is smaller than that of the connecting pipe 23 and there is a baffle plate 211 at the connection, the air is evenly distributed to the connecting pipe 23. Then it flows into the buffer chamber assembly 231 fixedly installed inside the connecting pipe 23. It stays briefly in the buffer shell 2311. The airflow drives the fan blades 2314 to rotate, which reduces the airflow speed and makes the pressure distribution uniform. Then it flows into the first branch pipe 24 through two sets of exhaust holes 1 2315 and into the second branch pipe 25 through exhaust holes 2316. The air from the second branch pipe 25 supplies air to the top of the tunnel kiln 1, and the air from the first branch pipe 24 supplies air to the bottom of the tunnel kiln 1. The air supplied from the bottom stirs up the relatively static airflow at the bottom of the kiln and mixes it thoroughly with the rising hot flue gas, breaking the temperature stratification phenomenon in the kiln, reducing the temperature difference between the upper and lower parts of the kiln, promoting the uniformity of heat exchange, and providing a stable and uniform temperature environment for the materials in the tunnel kiln 1.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A ventilation device for a tunnel kiln, characterized in that: The system includes a tunnel kiln, with an air supply device fixedly installed at its upper end. The air supply device includes an air supply pipe, one end of which is fixedly connected to a fan, and the other end of which is fixedly installed with a connecting pipe. Multiple sets of first branch pipes are fixedly installed on the outside of the connecting pipe, one end of each first branch pipe is connected to the inside of the connecting pipe, and multiple sets of second branch pipes are fixedly installed at the lower end of the connecting pipe. One end of each second branch pipe is connected to the inside of the connecting pipe, the other end of each first branch pipe is connected to the lower end of the tunnel kiln, and the other end of each second branch pipe is connected to the upper end of the tunnel kiln. Multiple sets of buffer chamber assemblies are fixedly installed inside the connecting pipe, and the buffer chamber assemblies are connected to the first branch pipe and the second branch pipe.

2. The tunnel kiln air supply device according to claim 1, characterized in that: One end of the air supply pipe is fixedly connected to the fan by bolts, and the other end of the air supply pipe is fixedly connected to the connecting pipe by bolts.

3. The tunnel kiln air supply device according to claim 2, characterized in that: The diameter of the air supply pipe is smaller than the diameter of the connecting pipe.

4. The tunnel kiln ventilation device according to claim 3, characterized in that: A baffle plate is fixedly installed at the connection between the air supply pipe and the connecting pipe.

5. The tunnel kiln air supply device according to claim 4, characterized in that: The buffer chamber assembly includes a buffer shell, with two sets of vent holes one on the outer side of the buffer shell, which are connected to the first branch pipe. A second vent hole is provided at the lower end of the buffer shell, which is connected to the second branch pipe.

6. The tunnel kiln air supply device according to claim 5, characterized in that: Both ends of the buffer shell are fixedly installed with barrier rings, and a connecting frame is fixedly installed inside the barrier ring. Fan blades are rotatably installed on the side of the two sets of connecting frames that are far apart from each other.

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