A kiln cooling structure capable of improving cooling effect

Abstract

The present invention discloses a kiln cooling structure capable of improving cooling effect, comprising a kiln body and a roller conveyor belt arranged inside the kiln body, the kiln body comprising a rapid cooling section, a slow cooling section, a fast cooling section and a cold box section arranged in sequence along the conveying direction of the brick blanks, the cold box section comprising a box body, an exhaust assembly and a blowing assembly, the roller conveyor belt is arranged through the inside of the box body, and the internal cavity of the box body is divided into an exhaust chamber located above the roller conveyor belt and a blowing chamber located below the roller conveyor belt. The kiln cooling structure capable of improving cooling effect accelerates the cooling speed of the brick blanks, effectively improves the cooling and cooling efficiency of the brick blanks, improves the firing efficiency, reduces the production cost, saves energy, and solves the problems of too high surface temperature of the brick blanks, low cooling speed, slow cooling efficiency, brittle bricks and easy cracking, large energy consumption and high cost during the firing and cooling process of the brick blanks.

Description

Technical Field

[0001] The invention relates to the technical field of kiln equipment, and in particular to a kiln cooling structure capable of improving cooling effect. Background Art

[0002] Ceramic products are increasingly favored by people. Ceramic kilns are essential key equipment in the production of ceramic industry. Traditional kilns are divided into preheating section, firing section and cooling section. The cooling section includes rapid cooling section, slow cooling section and fast cooling section. The allocation ratio of each section is regulated. It is found in practice that when the kiln is almost burned, the biggest bottleneck is that the surface temperature of the bricks is too high after leaving the kiln, which easily leads to brittle bricks, cracking and other problems, seriously affecting the quality of the bricks. The temperature of the bricks is significantly affected by the kiln in the cooling section, namely the rapid cooling section, slow cooling section and fast cooling section. The existing kiln cooling structure usually uses a rapid cooling fan to exhaust air inside the closed box, which has the problems of low cooling speed, slow cooling efficiency, high energy consumption and high cost. Summary of the invention

[0003] In response to the problems raised in the background technology, the purpose of the present invention is to propose a kiln cooling structure that can improve the cooling effect, accelerate the cooling rate of the brick blanks, effectively improve the cooling and temperature reduction efficiency of the brick blanks, improve the firing efficiency, reduce the production cost, and save energy, and solve the problems of too high surface temperature of the brick blanks, low cooling rate, slow cooling efficiency, brittle bricks and easy cracking, large energy consumption and high cost during the firing and cooling process of the brick blanks.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A kiln cooling structure capable of improving cooling effect comprises a kiln body and a roller conveyor belt arranged inside the kiln body, the kiln body comprises a rapid cooling section, a slow cooling section, a fast cooling section and a cold box section arranged in sequence along the conveying direction of the brick blanks, the cold box section comprises a box body, an exhaust assembly and a blowing assembly, the roller conveyor belt penetrates through the interior of the box body, and divides the internal cavity of the box body into an exhaust chamber located above the roller conveyor belt and a blowing chamber located below the roller conveyor belt, the box body is respectively provided with open openings on the left and right sides of the exhaust chamber, the exhaust chamber is connected with the atmosphere through the open openings, the box body is provided with the exhaust assembly at the exhaust chamber, the exhaust assembly is used for exhaust treatment of the exhaust chamber, the box body is provided with the blowing assembly at the blowing chamber, the blowing assembly is used for blowing cold air into the blowing chamber.

[0006] Further explained, the exhaust assembly includes an exhaust fan, an exhaust pipe and multiple exhaust hoods, the multiple exhaust hoods are respectively arranged at intervals on the top of the box body, and the exhaust hoods are connected with the exhaust chamber, the exhaust pipe is arranged on the top of the exhaust hood, and the exhaust pipe is connected with the exhaust hood, and the exhaust pipe is connected to the exhaust end of the exhaust fan.

[0007] Further explained, the plurality of exhaust hoods are spaced apart and arranged at the middle position of the top of the box body.

[0008] To further explain, side panels are respectively arranged on the left and right sides of the top of the box body, and the side panels are protruded toward one side of the roller conveyor belt.

[0009] Further explained, the blowing assembly includes a plurality of axial flow fans, and the plurality of axial flow fans are evenly spaced and arranged on the left and right sides of the lower part of the box body, and the blowing ends of the axial flow fans are connected to the blowing chamber.

[0010] To further explain, the plurality of axial flow fans are evenly and symmetrically arranged on the left and right sides of the lower portion of the box body.

[0011] Further explained, the blowing end of the axial flow fan is arranged upwardly tilted at the lower part of the box body, and the inclination angle of the axial flow fan relative to the horizontal plane is 15 to 30 degrees.

[0012] Further explanation: the top and bottom surfaces of the box body are both provided with a heat insulation layer, and the thickness of the heat insulation layer is 5 to 10 cm.

[0013] To further illustrate, the ratio of the lengths of the rapid cooling section, slow cooling section, fast cooling section and cold box section is (9-11): (20-22): (9-11): (9-11).

[0014] To further explain, a temperature sensor is also disposed inside the box, and the temperature sensor is disposed on the inner surface of the box at the exhaust chamber.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] 1. When the total length of the cooling section is constant, the fast cooling section is shortened and the cold box section is arranged downstream of the fast cooling section. In the cold box section, the box body is provided with the open openings on the left and right sides of the exhaust chamber, respectively. The open box body can connect the exhaust chamber with the outside atmosphere through the open openings. At this time, the blowing component blows cold air into the blowing chamber, and the cold air passes through the gaps between the rollers in the roller conveyor belt and blows toward the brick blanks to cool the brick blanks, so that the cold air becomes hot air after heat exchange and enters the exhaust chamber. The hot air in the exhaust chamber can be extracted by the exhaust component, while the relatively cold cold air from the outside passes through the open openings. The opening enters the exhaust chamber, and the brick blank is further cooled by natural cold wind. The design structure of the open exhaust makes the box body maintain a slight negative pressure, and the temperature outside the box body is relatively low, which can improve the working environment, so that the colder cold wind outside the box body enters the box body from the open opening, thereby greatly accelerating the cooling speed of the brick blank, effectively improving the cooling efficiency of the brick blank, and thus improving the firing efficiency. In addition, due to the combination of natural cold wind and mechanical cold wind, the production cost is effectively reduced, energy is saved, and the problems of too high surface temperature of the brick blank, low cooling speed, slow cooling efficiency, brittle bricks and easy cracking, large energy consumption and high cost during the firing and cooling process of the brick blank are solved;

[0017] 2. By arranging the exhaust fan, the exhaust pipe and a plurality of exhaust hoods, the plurality of exhaust hoods are arranged at intervals on the top of the box, and the hot air in the box can be evenly drawn into the exhaust pipe through the exhaust fan, and finally drawn out of the factory or used as waste heat, which effectively improves the heat exchange efficiency in the box and keeps a slight negative pressure inside the box. The ambient temperature outside the box is relatively low, and cold air can easily enter the exhaust chamber from the open port, thereby improving the cooling efficiency of the bricks;

[0018] 3. By arranging a plurality of the axial flow fans, the plurality of the axial flow fans are evenly spaced and arranged on the left and right sides of the lower part of the box body, so that air can be blown evenly into the blowing chamber. The cold air is blown onto the surface of the brick blanks through the gaps between the rollers of the roller conveyor belt to cool the brick blanks, thereby further improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0020] Figure 1 It is a front view schematic diagram of a kiln cooling structure capable of improving cooling effect according to an embodiment of the present invention;

[0021] Figure 2It is a front view schematic diagram of a cold box section of a kiln cooling structure capable of improving cooling effect according to an embodiment of the present invention;

[0022] Figure 3 It is a side view schematic diagram of a cold box section of a kiln cooling structure capable of improving cooling effect according to an embodiment of the present invention;

[0023] Among them: kiln body 10, rapid cooling section 1, slow cooling section 2, fast cooling section 3, cold box section 4, box body 41, open mouth 411, side plate 412, insulation layer 413, temperature sensor 414, exhaust fan 421, exhaust main pipe 422, exhaust hood 423, axial flow fan 431, exhaust chamber 44, blowing chamber 45, roller conveyor belt 20. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figures 1 to 3 As shown, a kiln cooling structure capable of improving cooling effect comprises a kiln body 10 and a roller conveyor belt 20 arranged inside the kiln body 10, the kiln body 10 comprises a rapid cooling section 1, a slow cooling section 2, a fast cooling section 3 and a cold box section 4 arranged in sequence along the conveying direction of the brick blanks, the cold box section 4 comprises a box body 41, an exhaust assembly and a blowing assembly, the roller conveyor belt 20 penetrates the interior of the box body 41, and divides the internal cavity of the box body 41 into an exhaust chamber 44 located above the roller conveyor belt 20 and an exhaust chamber 45 located above the roller conveyor belt 20. The blowing chamber 45 is located below the roller conveyor belt 20, and the box body 41 is provided with openings 411 on the left and right sides of the exhaust chamber 44, respectively. The exhaust chamber 44 is connected to the atmosphere through the openings 411, and the box body 41 is provided with the exhaust component at the exhaust chamber 44, and the exhaust component is used for exhausting the exhaust chamber 44, and the box body 41 is provided with the blowing component at the blowing chamber 45, and the blowing component is used to blow cold air into the blowing chamber 45.

[0027] The traditional kiln is divided into a preheating section, a firing section and a cooling section, wherein the cooling section further includes a rapid cooling section, a slow cooling section and a fast cooling section, and the distribution ratio of each section is subject to certain regulations. In the present invention, when the total length of the cooling section is constant, by shortening the fast cooling section 3, the cold box section 4 is arranged downstream of the fast cooling section 3. Since in the cold box section 4, the box body 41 is respectively provided with the open openings 411 on the left and right sides of the exhaust chamber 44, the open box body 41 can connect the exhaust chamber 44 with the outside atmosphere through the open openings 411. At this time, the blowing component blows cold air into the blowing chamber 45, and the cold air passes through the gaps between the rollers in the roller conveyor belt 20 and blows toward the bricks to cool the bricks, so that the cold air becomes hot air after heat exchange and enters the exhaust chamber 44. The exhaust chamber The hot air in 44 can be extracted through the exhaust assembly, while the relatively cold air from the outside enters the exhaust chamber 44 through the open port 411, and the bricks are further cooled by natural cold air. The design structure of the open exhaust makes the box body 41 maintain a slight negative pressure, and the temperature outside the box body is relatively low, which can improve the working environment, so that the relatively cold air outside the box body 41 enters the box body 41 from the open port 411, thereby greatly accelerating the cooling speed of the bricks, effectively improving the cooling efficiency of the bricks, and thus improving the firing efficiency. In addition, due to the combination of natural cold air and mechanical cold air, the production cost is effectively reduced, energy is saved, and the problems of too high surface temperature of the bricks, low cooling speed, slow cooling efficiency, brittle bricks and easy cracking, large energy consumption and high cost during the firing and cooling process of the bricks are solved.

[0028] Further explained, the exhaust assembly includes an exhaust fan 421, an exhaust pipe 422 and multiple exhaust hoods 423, the multiple exhaust hoods 423 are respectively arranged at intervals on the top of the box body 41, and the exhaust hoods 423 are connected to the exhaust chamber 44, the exhaust pipe 422 is arranged on the top of the exhaust hood 423, and the exhaust pipe 422 is connected to the exhaust hood 423, and the exhaust pipe 422 is connected to the exhaust end of the exhaust fan 421.

[0029] By arranging the exhaust fan 421, the exhaust pipe 422 and the plurality of exhaust hoods 423, the plurality of exhaust hoods 423 are respectively arranged at intervals on the top of the box body 41, so that the hot air in the box body 41 can be evenly drawn into the exhaust pipe 422 through the exhaust fan 421, and finally drawn out of the factory or used as waste heat, thereby effectively improving the heat exchange efficiency in the box body 41 and maintaining a slight negative pressure inside the box body 41. The ambient temperature outside the box body 41 is relatively low, and cold air can easily enter the exhaust chamber 44 from the open port 411, thereby improving the cooling efficiency of the bricks.

[0030] Preferably, the plurality of exhaust hoods 423 are spaced apart and arranged at the middle position of the top of the box body 41 .

[0031] By arranging a plurality of the exhaust hoods 423 at intervals in the middle position of the top of the box body 41, the hot air in the exhaust chamber 44 rises and then gathers in the middle of the exhaust chamber 44. The exhaust hood 423 can extract the hot air gathered in the middle of the exhaust chamber 44, thereby effectively improving the exhaust efficiency of the hot air in the exhaust chamber 44 and improving the cooling effect on the bricks.

[0032] To further explain, side panels 412 are respectively disposed on the left and right sides of the top of the box body, and the side panels 412 are protruded toward one side of the roller conveyor belt 20 .

[0033] By arranging the side panels 412 on the left and right sides of the top of the box body 41, the side panels 412 can block the cold wind from the outside, so that the cold wind can enter the exhaust chamber 44 through the open port 411 close to the roller conveyor belt 20, so that the cold wind can directly blow and cool the brick blanks on the roller conveyor belt 20, thereby improving the cooling effect of the brick blanks.

[0034] To further explain, the blowing assembly includes a plurality of axial flow fans 431 , which are evenly spaced apart on the left and right sides of the lower portion of the box body 41 , and the blowing ends of the axial flow fans 431 are connected to the blowing chamber 45 .

[0035] By setting up a plurality of the axial flow fans 431, the plurality of the axial flow fans 431 are evenly spaced and arranged on the left and right sides of the lower part of the box body 41, so that air can be blown evenly into the blowing chamber 45. The cold air is blown onto the surface of the brick blanks through the gaps between the rollers of the roller conveyor belt 20 to cool the brick blanks, thereby further improving the heat exchange efficiency.

[0036] Preferably, the plurality of axial flow fans 431 are evenly spaced and symmetrically arranged on the left and right sides of the lower portion of the box body 41 .

[0037] The plurality of axial flow fans 431 are symmetrically arranged at evenly spaced intervals on the left and right sides of the lower part of the box body 41, so that the axial flow fan 431 located on the left side of the lower part of the box body 41 corresponds one to one with the axial flow fan 431 located on the right side of the lower part of the box body 41, so that air can be blown evenly from the left and right sides of the lower part of the box body 41, so that the cooling effect on the brick blanks is more uniform, which is beneficial to improving the firing quality of the brick blanks.

[0038] To further explain, the blowing end of the axial flow fan 431 is arranged at the lower part of the box body 41 and tilted upward, and the tilt angle of the axial flow fan 431 relative to the horizontal plane is 15 to 30 degrees.

[0039] By tilting the blowing end of the axial flow fan 431 upward at the lower part of the box body 41, the blowing direction of the axial flow fan 431 can be tilted toward the direction of the bricks transported by the roller conveyor belt 20, thereby ensuring the cooling and blowing effect on the bricks. The inclination angle of the axial flow fan 431 relative to the horizontal plane is 15 to 30 degrees. If the inclination angle of the axial flow fan 431 relative to the horizontal plane is too large, the cold wind is easy to blow directly to the top surface of the box body 41, affecting the blowing effect on the bricks. If the inclination angle of the axial flow fan 431 relative to the horizontal plane is too small, the cold wind is difficult to blow directly to the bricks, which easily reduces the cooling efficiency of the bricks.

[0040] Preferably, both the top and bottom surfaces of the box body 41 are provided with a heat insulation layer 413 , and the thickness of the heat insulation layer 413 is 5 to 10 cm.

[0041] Since the exhaust component draws away the hot air in the exhaust chamber 44, the thermal insulation layer 413 is provided on the top surface of the box body 41 to prevent the hot air drawn away by the exhaust component from affecting the exhaust chamber 44 again, thereby preventing the temperature in the exhaust chamber 44 from rising again. The thermal insulation layer 413 is provided on the bottom surface of the box body 41 to prevent the temperature of the external environment from affecting the temperature of the cold air in the blowing chamber 45, thereby ensuring the cooling effect on the brick blanks. The thickness of the thermal insulation layer 413 is limited to ensure the thermal insulation effect of the thermal insulation layer 413. If the thickness of the thermal insulation layer 413 is too thin, the thermal insulation effect may be reduced, and the hot air may easily cause the temperature of the exhaust chamber 44 to rise, thereby affecting the cooling effect of the brick blanks.

[0042] Specifically, the material of the thermal insulation layer 413 is a high-temperature resistant thermal insulation material, such as high-temperature resistant thermal insulation cotton or high-temperature resistant thermal insulation coating, which has high-temperature resistance and thermal insulation effects, high thermal insulation efficiency, and ensures the thermal insulation effect of the box.

[0043] Preferably, the length ratio of the rapid cooling section 1, the slow cooling section 2, the fast cooling section 3 and the cold box section 4 is (9-11): (20-22): (9-11): (9-11).

[0044] Preferably, the ratio of the lengths of the rapid cooling section 1, the slow cooling section 2, the fast cooling section 3 and the cold box section 4 is 9:22:9:10.

[0045] By limiting the length ratio of the rapid cooling section 1, the slow cooling section 2, the fast cooling section 3 and the cold box section 4, the high-temperature bricks are rapidly cooled and hardened in the rapid cooling section 1, and the deformation is basically stable. Then, the bricks enter the slow cooling section 2 to prevent the bricks from being too brittle and cracking. The bricks are then rapidly cooled by the fast cooling section 3 and the cold box section 4, which can effectively improve the cooling efficiency while ensuring the cooling quality of the bricks.

[0046] Preferably, a temperature sensor 414 is further provided inside the box body 41 , and the temperature sensor 414 is arranged on the inner surface of the box body 41 at the exhaust chamber 44 .

[0047] By arranging the temperature sensor 414 inside the box body 41, the temperature inside the box body 41 can be monitored in real time. In cold weather, if the internal temperature of the box body 41 is not high, the blowing component can be turned off, and the bricks can be cooled by natural cooling through the cold air blown in through the open port 411, thereby saving electricity. When the internal temperature of the box body 41 is high, the blowing component can be opened in time, and the bricks can be cooled by natural cooling plus mechanical blowing cooling, which has strong application flexibility.

[0048] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A kiln cooling structure capable of improving cooling effect, characterized in that: The invention comprises a kiln body and a roller conveyor belt arranged inside the kiln body, the kiln body comprises a rapid cooling section, a slow cooling section, a fast cooling section and a cold box section which are arranged in sequence along the conveying direction of the brick blanks, the cold box section comprises a box body, an exhaust assembly and a blowing assembly, the top and bottom surfaces of the box body are both provided with a heat insulation layer, the roller conveyor belt penetrates the interior of the box body, and divides the internal cavity of the box body into an exhaust chamber located above the roller conveyor belt and a blowing chamber located below the roller conveyor belt, the box body is respectively provided with openings on the left and right sides of the exhaust chamber, the exhaust chamber is connected to the atmosphere through the openings, the box body is provided with the exhaust assembly at the exhaust chamber, the exhaust assembly is used for exhaust treatment of the exhaust chamber, the box body is provided with the blowing assembly at the blowing chamber, the blowing assembly is used for blowing cold air into the blowing chamber; The blowing assembly includes a plurality of axial flow fans, and the blowing ends of the axial flow fans are arranged at the lower part of the box body with an upward tilt; The length ratio of the rapid cooling section, slow cooling section, fast cooling section and cold box section is (9-11): (20-22): (9-11): (9-11).

2. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The exhaust assembly includes an exhaust fan, an exhaust pipe and multiple exhaust hoods. The multiple exhaust hoods are respectively arranged at intervals on the top of the box body, and the exhaust hoods are connected to the exhaust chamber. The exhaust pipe is arranged on the top of the exhaust hood, and the exhaust pipe is connected to the exhaust hood. The exhaust pipe is connected to the exhaust end of the exhaust fan.

3. The kiln cooling structure capable of improving cooling effect according to claim 2, characterized in that: The plurality of exhaust hoods are respectively arranged at intervals at the middle position of the top of the box body.

4. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The left and right sides of the top of the box body are respectively provided with side plates, and the side plates are protruded toward one side of the roller conveyor belt.

5. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The plurality of axial flow fans are evenly spaced and arranged on the left and right sides of the lower part of the box body, and the blowing ends of the axial flow fans are communicated with the blowing chamber.

6. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The plurality of axial flow fans are evenly and symmetrically arranged on the left and right sides of the lower part of the box body.

7. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The inclination angle of the axial flow fan relative to the horizontal plane is 15 to 30 degrees.

8. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: The thickness of the heat insulation layer is 5 to 10 cm.

9. The kiln cooling structure capable of improving cooling effect according to claim 1, characterized in that: A temperature sensor is also provided inside the box body, and the temperature sensor is arranged on the inner surface of the box body at the exhaust chamber.

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