Tunnel kiln cooling device

Abstract

The present application provides a tunnel kiln cooling device, which relates to the technical field of tunnel kilns, including a cooling section tunnel kiln, in which a cooling pipe is arranged, the air inlet of the cooling pipe passes through the outer wall of the cooling section tunnel kiln and is connected to an external cooling system, the other end of the cooling pipe is closed, and the cooling pipe includes a plurality of inverted U-shaped pipes and a plurality of transverse pipes, the plurality of inverted U-shaped pipes are arranged in sequence along the axial direction of the cooling section tunnel kiln, and the bottoms of the left and right sides of adjacent inverted U-shaped pipes are connected with transverse pipes at intervals, a plurality of air outlet pipes facing the conveying equipment in the tunnel kiln are opened on the cooling pipe, and a disperser is arranged on the air outlet pipe, and the disperser is used to disperse the direction of the cold air ejected from the air outlet pipe. The tunnel kiln cooling device of the present application improves the cooling efficiency by spirally arranging the cooling pipe in the cooling section tunnel kiln.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel kilns, and in particular to a tunnel kiln cooling device. Background Art

[0002] A tunnel kiln is generally a long straight tunnel with fixed walls and vaults on both sides and the top. Conveying equipment runs on the tracks laid at the bottom. Combustion equipment is located on both sides of the middle of the kiln, forming a fixed high-temperature-firing zone. The high-temperature flue gas generated by the combustion flows along the tunnel toward the kiln head under the action of the chimney or induced draft fan at the front end of the tunnel kiln, and simultaneously preheats the products entering the kiln. This section constitutes the preheating zone of the tunnel kiln. Cold air is blown into the kiln tail of the tunnel kiln to cool the products, forming the cooling zone of the tunnel kiln. The ceramic blanks are driven from the kiln head to the kiln tail by the conveying equipment, and are preheated in the hot zone, calcined in the firing zone, and cooled in the cooling zone to obtain the finished product.

[0003] In the prior art, there are some tunnel kiln cooling devices. For example, patent number CN112781366A discloses a tunnel kiln cooling section ventilation cooling device, including a cooling section tunnel kiln, the upper end of the cooling section tunnel kiln is fixedly connected to the lower end of the air inlet pipe, the two ends of the liquid nitrogen pipe respectively pass through the two side walls of the cold air pipe and are fixed on the two side walls of the cold air pipe, the feed pipe passes through the cold air pipe and is fixedly connected to the liquid nitrogen pipe, the cold air pipe is fixedly connected to the upper end of the straight pipe through a connecting pipe, the air inlet end of the air inlet fan is fixedly connected to one end of the air inlet pipe, and the lower end of the side of the cooling section tunnel kiln is fixedly connected with an air outlet device.

[0004] However, the air inlet pipe and the air outlet pipe of the existing tunnel kiln cooling device are divided into multiple connecting pipes, and the multiple connecting pipes all pass through the kiln wall of the tunnel kiln into the tunnel kiln. In actual application, the process of opening holes in the tunnel kiln is complicated, time-consuming and labor-intensive, and has high maintenance costs. In addition, the air inlet pipe of the existing device only blows air into the tunnel kiln from one side of the tunnel kiln, and the air blown in cannot be evenly dispersed in the tunnel kiln, resulting in poor cooling effect. Utility Model Content

[0005] The present application provides a tunnel kiln cooling device, which is used to solve the problems of multiple holes opened on the tunnel kiln wall, complex process and poor cooling in the existing tunnel kiln cooling section in the background technology.

[0006] The present application provides a tunnel kiln cooling device, comprising a cooling section tunnel kiln, wherein a cooling pipe is provided in the cooling section tunnel kiln, an air inlet of the cooling pipe passes through one side wall of the cooling section tunnel kiln and is connected to an external cooling system, and the end of the cooling pipe is a closed structure;

[0007] The cooling pipe includes a plurality of inverted U-shaped pipes and a plurality of transverse pipes. The plurality of inverted U-shaped pipes are evenly arranged in sequence along the axial direction of the cooling section tunnel kiln. The plurality of transverse pipes are staggered in sequence between the plurality of inverted U-shaped pipes and are connected to the plurality of inverted U-shaped pipes.

[0008] The cooling pipe is provided with a plurality of air outlet pipes directed toward the conveying equipment in the cold section tunnel kiln;

[0009] The air outlet pipe is sleeved with a disperser, and the disperser can disperse the direction of the cold air sprayed from the air outlet pipe.

[0010] Furthermore, the disperser includes a trumpet-shaped shell, the small diameter end of the shell is sleeved on the air outlet pipe, a connecting rod is provided on the inner wall of the shell close to the small diameter end, a baffle is provided on the connecting rod, the baffle corresponds to the position of the outlet of the air outlet pipe, and a certain gap is provided between the baffle and the inner wall of the shell.

[0011] Furthermore, the diameter of the air outlet pipe on the cooling pipe increases successively from front to back along the cooling section tunnel kiln.

[0012] Furthermore, a heat dissipation pipe is also provided in the cooling section tunnel kiln. The structure of the heat dissipation pipe is similar to that of the cooling pipe. The heat dissipation pipe is provided with a plurality of air suction ports facing the conveying equipment in the tunnel kiln.

[0013] Furthermore, the diameter of the air intake port on the heat dissipation pipe decreases from top to bottom along the height direction of the cooling section tunnel kiln.

[0014] Furthermore, the heat dissipation pipe is attached to the inner wall of the cooling section tunnel kiln, and the cooling pipe is on a side of the heat dissipation pipe away from the conveying equipment in the tunnel kiln.

[0015] Furthermore, dustproof nets are provided on the air inlet of the cooling pipe and the air outlet of the heat dissipation pipe.

[0016] The tunnel kiln cooling device provided by the present application extends one end of the cooling pipe into the cooling section tunnel kiln, and then places the entire cooling pipe in the cooling section tunnel kiln, thereby only needing to chisel an opening in the tunnel kiln. Compared with the prior art of opening multiple holes in the tunnel kiln, this saves process procedures; the cooling pipe is spirally arranged in the tunnel kiln to increase the air outlet area in the tunnel kiln, so that the products in the tunnel kiln can be blown at multiple angles; by arranging a disperser on the blowing pipe, the cold air can be dispersed and blown into the tunnel kiln, so that the cold air in the tunnel kiln is evenly dispersed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of this application;

[0019] Figure 2 It is a partial structural diagram of this application;

[0020] Figure 3 This is a schematic diagram of the front view structure of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the splitter of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the cooling pipe of this application;

[0023] Description of reference numerals:

[0024] 1: cooling section tunnel kiln; 11: first side wall; 12: second side wall; 2: cooling pipe; 21: inverted U-shaped pipe; 22: horizontal pipe; 3: air inlet; 4: air outlet pipe; 5: disperser; 51: outer shell; 52: connecting rod; 53: baffle; 6: heat dissipation pipe; 7: air outlet; 8: air intake; 9: dust screen; 10: conveying equipment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0026] See also Figure 1-Figure 5 The tunnel kiln cooling device of the present application comprises a cooling section tunnel kiln 1, in which a cooling pipe 2 is provided, an air inlet 3 of the cooling pipe 2 passes through one side wall of the cooling section tunnel kiln 1 and is connected to an external cooling system, and the end of the cooling pipe 2 is a closed structure;

[0027] The cooling tube 2 includes a plurality of inverted U-shaped tubes 21 and a plurality of transverse tubes 22. The plurality of inverted U-shaped tubes 21 are sequentially arranged along the axial direction of the cooling section tunnel kiln 1. The bottoms of the left and right sides of adjacent inverted U-shaped tubes 21 are spaced apart and connected with transverse tubes 22.

[0028] The cooling pipe 2 is provided with a plurality of air outlet pipes 4 directed toward the conveying device 10 in the tunnel kiln;

[0029] A disperser 5 is sleeved on the air outlet pipe 4 , and the disperser 5 is used to disperse the direction of the cold air sprayed from the air outlet pipe 4 .

[0030] Most of the cooling pipe 2 of the present application is spirally arranged in the tunnel kiln, and only one end thereof for connecting to the external cooling system passes through the cooling section tunnel kiln. Compared with the prior art, the present application only needs to open a hole in the cooling section tunnel kiln 1, which saves construction cost and construction difficulty compared with the prior cooling device which needs to open multiple holes in the tunnel kiln. In addition, the cooling pipe 2 is spirally arranged in the cooling section tunnel kiln 1. Compared with the prior art, the prior art can only realize the cooling pipe 2 blowing in one direction in the tunnel kiln, while the present application can realize multi-sided blowing of the cooling section tunnel kiln 1, thereby improving the cooling efficiency.

[0031] For details, please refer to Figure 5 The "front" direction referred to in this application is the end of the cooling pipe 2 extending out of the first side wall 11 of the cooling section tunnel kiln 1. When the cooling pipe 2 of this application is laid in the tunnel kiln, multiple inverted U-shaped tubes 21 are erected on the conveying equipment 10 in the cooling section tunnel kiln 1, and multiple transverse tubes 22 connect the bottoms of the multiple inverted U-shaped tubes 21 in sequence. The transverse tube 22 is close to the bottom of the conveying equipment 10 and does not affect the operation of the conveying equipment 10. The multiple inverted U-shaped tubes 21 blow air to the upper side, left side and right side of the conveying equipment 10, and the transverse tube 22 blows air to the left and right sides of the bottom of the conveying equipment 10. Through the arrangement of multiple inverted U-shaped tubes 21 and multiple transverse tubes 22, the wind receiving area of ​​the conveying equipment 10 and the products on the conveying equipment 10 can be increased, so that the products can be quickly cooled and formed, thereby improving production efficiency.

[0032] In addition, a disperser 5 is provided on the cooling pipe 2 to disperse the wind blown out of the air outlet pipe 4 on the cooling pipe 2, thereby preventing the cold wind blown out of the air outlet pipe from directly blowing toward the product on the conveying device 10, causing the product to be shocked and exploded.

[0033] For further information, see Figure 4 The diffuser 5 includes a trumpet-shaped shell 51, the small diameter end of the shell 51 is sleeved on the air outlet pipe 4, a connecting rod 52 is provided on the inner wall of the shell 51 near the small diameter end, and a baffle 53 is provided on the connecting rod 52. The baffle 53 corresponds to the position of the outlet of the air outlet pipe 4, and a certain gap is provided between the baffle 53 and the inner wall of the shell 51.

[0034] In a possible implementation, two groups of connecting rods 52 are provided, which are symmetrically connected to the inner wall of the housing 51 near the small diameter end;

[0035] The shape of the baffle 53 is the same as the cross-sectional shape of the air outlet pipe 4, both of which are circular, and the diameter of the baffle 53 is also the same as the diameter of the air outlet pipe 4, which can block the wind directly blown out of the air outlet pipe 4, so that the wind blown out of the air outlet pipe is blown out along the two sides of the baffle 53, that is, along the gap between the connecting rod 52 and the trumpet-shaped housing 51;

[0036] Furthermore, the diameter of the air outlet pipe 4 on the cooling pipe 2 increases from the front to the back along the cooling section tunnel kiln 1 .

[0037] In one possible implementation, the conveying device 10 passes through the preheating zone, calcining zone and cooling zone in the tunnel kiln in sequence. The temperature of the product just entering the cooling zone from the calcining zone is high, and the diameter of the blowing pipe is set small so that the product has an adaptation process when receiving the cold air. As the product moves in the kiln with the conveying device 10, the diameter of the blowing pipe becomes larger and more cold air can be blown out, thereby realizing the cooling and molding of the product in the cooling section tunnel kiln 1.

[0038] Furthermore, a heat dissipation pipe 6 is further provided in the cooling section tunnel kiln 1. The structure of the heat dissipation pipe 6 is similar to that of the cooling pipe 2. The heat dissipation pipe 6 is provided with a plurality of air suction ports 8 facing the conveying device 10 in the tunnel kiln.

[0039] In one possible implementation, the air intake 8 can absorb the waste heat in the cooling tube tunnel kiln 2 to achieve a ventilation effect, and the heat dissipation pipe 6 discharges the hot air in the cold section tunnel kiln. The cooling tube 2 discharges cold air into the tunnel kiln to increase the air flow rate in the cooling section tunnel kiln 1, which can speed up the cooling speed in the cooling section tunnel kiln 1 and improve the cooling efficiency of the product.

[0040] In addition, the hot air extracted from the heat dissipation pipe 6 is connected to an external pipe and transmitted to the tunnel kiln preheating zone, so as to realize further utilization of the hot air and improve the utilization rate of energy.

[0041] Furthermore, the diameter of the air intake port 8 on the heat dissipation pipe 6 decreases from top to bottom along the height direction of the cooling section tunnel kiln 1 .

[0042] In a possible implementation, since the waste heat at the top is greater than the heat at the bottom, the diameter of the upper air suction port 8 is larger than the diameter of the lower air suction port 8 .

[0043] Furthermore, the heat dissipation pipe 6 is attached to the inner wall of the cooling section tunnel kiln 1, and the cooling pipe 2 is on the side of the heat dissipation pipe 6 away from the conveying device 10 in the tunnel kiln.

[0044] In one possible implementation, the cooling pipe 2 is arranged on the side close to the conveying device 10, so that the cold air blown out by the cooling pipe 2 can cool the products on the conveying device 10, and a gap is set between the heat dissipation pipe 6 and the cooling pipe 2 to prevent the heat dissipation pipe 6 from directly discharging the cold air blown out by the cooling pipe 2.

[0045] Furthermore, dustproof nets 9 are provided on the air inlet 3 of the cooling pipe 2 and the air outlet 7 of the heat dissipation pipe 6 .

[0046] In a possible implementation, the wind from the cooling pipe 2 entering the cooling section tunnel kiln 1 and the wind from the heat dissipation pipe 6 discharged from the cooling section tunnel kiln 1 will pass through the dustproof net 9 to reduce pollution.

[0047] The working principle of the device of the present application in actual use is as follows: when the conveying equipment 10 transports the product to the cooling section tunnel kiln 1, the external cooling system transmits cold air to the air inlet 3 of the cooling pipe 2, and cools and shapes the product in the cooling section tunnel kiln 1. At the same time, the hot air in the cooling section tunnel kiln 1 is discharged through the air outlet 8 of the heat dissipation pipe 6 through the external exhaust fan. In this process, the disperser 5 on the cooling pipe 2 evenly disperses the cold air blown out by the blowing pipe 4 into the cold section tunnel kiln, ensuring that the cold air is evenly dispersed in the cooling section tunnel kiln 1, and the product in the cold section tunnel kiln 1 is cooled and formed.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tunnel kiln cooling device, comprising a cooling section tunnel kiln (1), characterized in that: The cooling section tunnel kiln (1) is provided with a cooling pipe (2), an air inlet (3) of the cooling pipe (2) passes through one side wall of the cooling section tunnel kiln (1) and is connected to an external cooling system, and the end of the cooling pipe (2) is a closed structure; The cooling pipe (2) comprises a plurality of inverted U-shaped pipes (21) and a plurality of transverse pipes (22); the plurality of inverted U-shaped pipes (21) are uniformly arranged in sequence along the axial direction of the cooling section tunnel kiln (1); and the plurality of transverse pipes (22) are staggeredly arranged in sequence between the plurality of inverted U-shaped pipes (21) and are connected to the plurality of inverted U-shaped pipes (21); The cooling pipe (2) is provided with a plurality of air outlet pipes (4) facing the conveying equipment (10) in the cooling section tunnel kiln (1); The air outlet pipe (4) is sleeved with a disperser (5), and the disperser (5) can disperse the cold air ejected from the air outlet pipe (4).

2. The tunnel kiln cooling device according to claim 1, characterized in that: The disperser (5) comprises a trumpet-shaped outer shell (51), the small-diameter end of the outer shell (51) being sleeved on the air outlet pipe (4), a connecting rod (52) being provided on the inner wall of the outer shell (51) close to the small-diameter end, a baffle (53) being provided on the connecting rod (52), the baffle (53) corresponding to the position of the outlet of the air outlet pipe (4), and a certain gap being provided between the baffle (53) and the inner wall of the outer shell (51).

3. The tunnel kiln cooling device according to claim 1, characterized in that: The diameter of the air outlet pipe (4) on the cooling pipe (2) increases successively from the front to the back along the cooling section tunnel kiln (1).

4. The tunnel kiln cooling device according to claim 1, characterized in that: The cooling section tunnel kiln (1) is also provided with a heat dissipation pipe (6), the structure of the heat dissipation pipe (6) is similar to that of the cooling pipe (2), and the heat dissipation pipe (6) is provided with a plurality of air suction ports (8) facing the conveying equipment (10) in the tunnel kiln.

5. The tunnel kiln cooling device according to claim 4, characterized in that: The diameter of the air intake port (8) on the heat dissipation pipe (6) decreases from top to bottom along the height direction of the cooling section tunnel kiln (1).

6. The tunnel kiln cooling device according to claim 4, characterized in that: The heat dissipation pipe (6) is attached to the inner wall of the cooling section tunnel kiln (1), and the cooling pipe (2) is located on a side of the heat dissipation pipe (6) close to the conveying equipment (10) in the tunnel kiln.

7. The tunnel kiln cooling device according to claim 5, characterized in that: Dust-proof nets (9) are provided on the air inlet (3) of the cooling pipe (2) and the air outlet (7) of the heat dissipation pipe (6).

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