Waste heat recycling device for cooling section of tunnel kiln

Abstract

The utility model relates to the technical field of tunnel kiln waste heat recovery, and discloses a tunnel kiln cooling section waste heat recycling device which comprises a cooling kiln, a waste heat leading-in hole is formed in the top of an inner cavity of the cooling kiln, and limiting grooves are formed in the upper ends of the two sides of the waste heat leading-in hole. Waste heat generated when calcined ceramic enters the cooling kiln can be gathered at the top of the cooling kiln, the waste heat is recycled through the waste heat drainage mechanism and the waste heat recycling mechanism, and heat energy gathered at the top of the cooling kiln is absorbed through the multiple sets of partition heat exchange plates and gathered between the adjacent partition heat exchange plates. Meanwhile, a waste heat baffle can block a large amount of waste heat, waste heat dissipation is avoided, the waste heat recovery efficiency is improved, dust in the cooling kiln is blocked through waste heat absorption holes in a horizontal heat conduction plate and a filter screen plate, waste heat is prevented from being absorbed away in the recovery time, and the waste heat recovery efficiency is improved. And the influence on preprocessing of ceramic products in the preheating kiln during waste heat recovery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of tunnel kilns, in particular to a waste heat recovery device for a cooling section of a tunnel kiln. Background Art

[0002] Tunnel kiln is a tunnel-like kiln built of refractory materials, thermal insulation materials and building materials, equipped with kiln cars and other vehicles. It is a modern continuous firing thermal equipment, widely used in the roasting production of ceramic products. Tunnel kilns are widely used in ceramic production for firing. The existing tunnel kiln body generally includes a preheating section, a high temperature section, a rapid cooling section, and a cooling section. The cooling section of the kiln often explodes.

[0003] The existing device for recovering waste heat from the cooling section of a tunnel kiln has a poor efficiency in recovering waste heat. The fluidity of the waste heat is poor, which easily forms heat exchange and leads to low recovery efficiency. The process is complicated, which causes the waste heat from ceramic calcination to be lost, increasing the cost of ceramic calcination. When recovering the waste heat, the dust in the cooling section will also be recovered, which in turn affects the calcination of ceramic products in the preheating section and reduces the quality of the ceramic products. Therefore, we need to propose a device for recovering waste heat from the cooling section of a tunnel kiln. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat recovery device for the cooling section of a tunnel kiln, to improve the efficiency of recovering the waste heat from heating up the cooling section, and to improve the preheating recovery efficiency by recovering the waste heat at the top of the tunnel kiln, and to avoid the dust in the cooling section being recovered together when the waste heat is recovered, thereby improving the quality of ceramic preforms in the preheating section, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery device for the cooling section of a tunnel kiln, comprising a cooling kiln, a waste heat introduction hole is provided on the top of the inner cavity of the cooling kiln, and limiting grooves are provided at the upper ends of both sides of the waste heat introduction hole, a filter screen is provided in the inner cavity of the waste heat introduction hole, and limiting plates are integrally formed on both sides of the filter screen, and two groups of limiting plates are respectively embedded in the two groups of limiting grooves, a horizontal heat exchange plate is detachably connected to the top of the inner cavity of the cooling kiln through multiple groups of first screws, and the horizontal heat exchange plate is arranged directly below the filter screen, multiple groups of partition heat exchange plates are integrally formed on the lower surface of the horizontal heat exchange plate, and the multiple groups of partition heat exchange plates are arranged at equal intervals, a plurality of layers of waste heat absorption holes are provided on the upper surface of the horizontal heat exchange plate, and the multiple layers of waste heat absorption holes are alternately arranged with the multiple groups of partition heat exchange plates, and a waste heat baffle is provided at one end of the top of the inner cavity of the cooling kiln.

[0006] Preferably, two groups of solid parts are integrally formed on the upper surface of the filter screen plate, and handles are fixedly connected to the upper surfaces of the two groups of solid parts, and the filter screen plate is arranged in parallel with the horizontal heat exchange plate.

[0007] Preferably, one end of the cooling kiln is connected to a rapid cooling kiln, and one end of the rapid cooling kiln is connected to a high-temperature kiln, and one end of the high-temperature kiln is connected to a preheating kiln, and a waste heat discharge hole is provided at the upper end of the preheating kiln.

[0008] Preferably, the cooling kiln is connected to the preheating kiln through a waste heat drainage mechanism, and a waste heat recovery mechanism is provided in the inner cavity of the waste heat drainage mechanism.

[0009] Preferably, the waste heat drainage mechanism includes a connecting pipe, one end of the connecting pipe is connected to a heat inlet pipe, and one end of the heat inlet pipe is connected to a heat absorption cover, a first convex edge is integrally formed on the outer side of the lower end of the heat absorption cover, the other end of the connecting pipe is connected to a heat exhaust pipe, and one end of the heat exhaust pipe is connected to the heat exhaust cover, and a second convex edge is integrally formed on the outer side of the lower end of the heat exhaust cover.

[0010] Preferably, the waste heat recovery mechanism includes a driving motor and two groups of triangular fixing frames installed in the inner cavity of the connecting pipe, a mounting portion is provided on the outside of the connecting pipe, the driving motor is fixedly connected to the upper surface of the mounting portion, the output shaft of the driving motor is transmission-connected with a rotating shaft, and the lower end of the rotating shaft passes through the connecting pipe and is fixedly connected to a first bevel gear, a connecting shaft is rotatably connected between the two groups of triangular fixing frames, one end of the connecting shaft passes through one group of triangular fixing frames and is fixedly connected to a second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0011] Preferably, an outer sleeve of the connecting shaft is provided with an outer side of the connecting shaft, and a plurality of groups of guide blades are fixedly connected to the outer side of the outer shaft, and the plurality of groups of guide blades are arranged in a circular array, the first flange is fixedly connected to the top of the cooling kiln by a plurality of groups of second screws, and the second flange is fixedly connected to the top of the preheating kiln by a plurality of groups of third screws.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model mainly achieves the coordination among the filter screen plate, the horizontal heat conducting plate, the partition heat exchange plate and the waste heat baffle plate, so that the waste heat generated by the calcined ceramics entering the cooling kiln will be gathered at the top of the cooling kiln, and the waste heat will be recovered through the waste heat drainage mechanism and the waste heat recovery mechanism, and the heat energy gathered at the top of the cooling kiln will be absorbed and gathered between the adjacent partition heat exchange plates through multiple groups of partition plates, and the waste heat baffle plate can block a large amount of waste heat to avoid the waste heat dissipation, thereby improving the waste heat recovery efficiency, and the dust in the cooling kiln will be blocked through the waste heat absorption holes on the horizontal heat conducting plate and the filter screen plate to avoid the waste heat being sucked away during the recovery time, thereby reducing the influence of waste heat recovery on the pre-processing of ceramic products in the preheating kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the cooling kiln of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the waste heat drainage mechanism of the utility model;

[0017] Figure 4 This is a schematic diagram of the preheating kiln structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the structure of the waste heat recovery mechanism of the utility model.

[0019] In the figure: 1. cooling kiln; 2. rapid cooling kiln; 3. high temperature kiln; 4. preheating kiln; 41. waste heat discharge hole; 5. waste heat diversion mechanism; 51. connecting pipe; 511. mounting part; 52. heat inlet pipe; 53. heat exhaust pipe; 54. heat absorption cover; 541. first flange; 55. heat exhaust cover; 551. second flange; 56. second screw; 57. third screw; 6. waste heat recovery mechanism; 61. driving motor; 62. rotating shaft; 63. first bevel gear; 64. second bevel gear; 65. triangular fixing frame; 66. outer shaft; 67. connecting shaft; 68. diversion blade; 7. filter screen; 71. solid part; 72. handle; 73. limit plate; 8. horizontal heat exchange plate; 81. partition heat exchange plate; 82. waste heat absorption hole; 9. waste heat baffle; 10. first screw; 11. waste heat introduction hole; 12. limit groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5The utility model provides a technical solution: a waste heat recycling device for a cooling section of a tunnel kiln, comprising a cooling kiln 1, a waste heat introduction hole 11 is provided on the top of the inner cavity of the cooling kiln 1, and limiting grooves 12 are provided on the upper ends of both sides of the waste heat introduction hole 11, a filter screen plate 7 is provided in the inner cavity of the waste heat introduction hole 11, and limiting plates 73 are integrally formed on both sides of the filter screen plate 7, and two groups of limiting plates 73 are respectively embedded in the two groups of limiting grooves 12, a horizontal heat exchange plate 8 is detachably connected to the top of the inner cavity of the cooling kiln 1 through multiple groups of first screws 10, and the horizontal heat exchange plate 8 is arranged directly below the filter screen plate 7, a plurality of groups of partition heat exchange plates 81 are integrally formed on the lower surface of the horizontal heat exchange plate 8, and the plurality of groups of partition heat exchange plates 81 are arranged at equal intervals, a plurality of layers of waste heat absorption holes 82 are provided on the upper surface of the horizontal heat exchange plate 8, and the plurality of layers of waste heat absorption holes 82 are alternately arranged with the plurality of groups of partition heat exchange plates 81, and a waste heat baffle 9 is provided at one end of the top of the inner cavity of the cooling kiln 1.

[0022] When in use, ceramic products are placed in the kiln car and enter the tunnel kiln for firing, and pass through the preheating kiln 4, high-temperature kiln 3, rapid cooling kiln 2 and cooling kiln 1 in sequence. Since the ceramics are naturally cooled in the cooling kiln 1 after rapid cooling after firing, there is still a lot of heat energy dissipated from the ceramic products and gathered at the top of the cooling kiln 1. The heat energy is gathered by multiple groups of partition heat exchange plates 81 and waste heat baffles 9 to avoid waste heat loss. At the same time, the driving motor 61 drives the rotating shaft 62 to rotate, and the connecting shaft 67 is engaged with the first bevel gear 63 through the second bevel gear 64, so that the multiple groups of drainage blades on the outside of the transmission outer shaft 66 rotate, forming a negative pressure to introduce the waste heat at the top of the cooling kiln 1 into the preheating kiln 4, thereby improving the utilization rate of the waste heat, and when the waste heat is recovered, the filter screen plate 7 can prevent dust from being recovered together with the waste heat, and avoid dust recovery to the preheating kiln 4. The ceramic products to be fired are affected, thereby reducing the molding quality of the ceramic products.

[0023] The upper surface of the filter screen plate 7 is integrally formed with two groups of solid parts 71, and the upper surfaces of the two groups of solid parts 71 are fixedly connected with handles 72. The filter screen plate 7 is arranged in parallel with the horizontal heat exchange plate 8. The handles 72 facilitate the disassembly and assembly of the filter screen plate 7, and the cleaning and replacement of the filter screen plate 7 are convenient, thereby improving the dust blocking efficiency.

[0024] One end of the cooling kiln 1 is connected to the rapid cooling kiln 2, and one end of the rapid cooling kiln 2 is connected to the high temperature kiln 3, and one end of the high temperature kiln 3 is connected to the preheating kiln 4. A waste heat discharge hole 41 is provided at the upper end of the preheating kiln 4. The waste heat can be extracted from the cooling kiln 1 through the waste heat discharge hole 41, and it is convenient to lead the heat energy absorbed by the horizontal heat exchange plate 8 and the partition heat exchange plate 81 out of the cooling kiln 1.

[0025] The cooling kiln 1 is connected to the preheating kiln 4 through a waste heat drainage mechanism 5, and a waste heat recovery mechanism 6 is provided in the inner cavity of the waste heat drainage mechanism 5. The waste heat is led to the preheating kiln 4 through the waste heat drainage mechanism 5 for reuse through the waste heat recovery mechanism 6, thereby reducing the energy consumption of the tunnel kiln and improving the waste heat recovery efficiency.

[0026] The waste heat drainage mechanism 5 includes a connecting pipe 51, one end of which is connected to a heat inlet pipe 52, and one end of which is connected to a heat absorption cover 54, a first flange 541 is integrally formed on the outer side of the lower end of the heat absorption cover 54, the other end of the connecting pipe 51 is connected to a heat exhaust pipe 53, and one end of the heat exhaust pipe 53 is connected to a heat exhaust cover 55, a second flange 551 is integrally formed on the outer side of the lower end of the heat exhaust cover 55, the area for extracting waste heat is increased by the heat inlet cover, thereby improving the efficiency of waste heat recovery, the waste heat is gathered through the heat inlet pipe 52, the connecting pipe 51 and the heat exhaust pipe 53, and diffused into the preheating kiln 4 through the heat exhaust cover 55, so that the waste heat can be evenly diffused in the preheating kiln 4.

[0027] The waste heat recovery mechanism 6 includes a drive motor 61 and two sets of triangular fixing frames 65 installed in the inner cavity of the connecting pipe 51. A mounting portion 511 is provided on the outer side of the connecting pipe 51. The drive motor 61 is fixedly connected to the upper surface of the mounting portion 511. The output shaft of the drive motor 61 is connected to the rotating shaft 62 in a transmission manner, and the lower end of the rotating shaft 62 passes through the connecting pipe 51 and is fixedly connected to the first bevel gear 63. A connecting shaft 67 is rotatably connected between the two sets of triangular fixing frames 65. One end of the connecting shaft 67 passes through one set of triangular fixing frames 65 and is fixed. A second bevel gear 64 is connected, and the second bevel gear 64 meshes with the first bevel gear 63. The driving motor 61 drives the rotating shaft 62, driving the first bevel gear 63 to mesh with the second bevel gear 64, so that the second bevel gear 64 drives the connecting shaft 67, and the outer shaft 66 and multiple sets of guide blades 68 rotate to form a negative pressure in the connecting pipe 51, thereby extracting the waste heat from the inner cavity of the waste heat kiln and sending it to the preheating kiln 4. The triangular fixing frame 65 improves the stability of the connecting shaft 67 during rotation, thereby improving the service life of the waste heat recovery mechanism 6.

[0028] An outer sleeve of the connecting shaft 67 is provided with an outer shaft 66, and a plurality of groups of guide blades 68 are fixedly connected to the outer side of the outer shaft 66, and the plurality of groups of guide blades 68 are arranged in a circular array, and the first flange 541 is fixedly connected to the top of the cooling kiln 1 by a plurality of groups of second screws 56, and the second flange 551 is fixedly connected to the top of the preheating kiln 4 by a plurality of groups of third screws 57. The first flange 541 and the second flange 551 facilitate the disassembly and assembly of the waste heat drainage mechanism 5, thereby facilitating the replacement of the filter screen plate 7, and the heat inlet cover and the heat exhaust cover 55 are both arranged in a trapezoidal shape, which improves the waste heat recovery of the cooling kiln 1 and facilitates the uniform diffusion of the waste heat in the preheating kiln 4.

[0029] Although 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 appended claims and their equivalents.

Claims

1. A device for recycling waste heat in a cooling section of a tunnel kiln, comprising a cooling kiln (1), characterized in that: A waste heat introduction hole (11) is provided at the top of the inner cavity of the cooling kiln (1), and limiting grooves (12) are provided at the upper ends of both sides of the waste heat introduction hole (11). A filter screen plate (7) is provided in the inner cavity of the waste heat introduction hole (11), and limiting plates (73) are integrally formed on both sides of the filter screen plate (7), and two groups of limiting plates (73) are respectively embedded in the two groups of limiting grooves (12). The top of the inner cavity of the cooling kiln (1) is detachably connected to a horizontal heat exchange plate via a plurality of groups of first screws (10). (8), and the horizontal heat exchange plate (8) is arranged directly below the filter screen plate (7), the lower surface of the horizontal heat exchange plate (8) is integrally formed with multiple groups of partition heat exchange plates (81), and the multiple groups of partition heat exchange plates (81) are arranged at equal intervals, the upper surface of the horizontal heat exchange plate (8) is provided with multiple layers of waste heat absorption holes (82), and the multiple layers of waste heat absorption holes (82) are alternately arranged with the multiple groups of partition heat exchange plates (81), and a waste heat baffle (9) is arranged at one end of the top of the inner cavity of the cooling kiln (1).

2. A waste heat recovery device for cooling section of a tunnel kiln according to claim 1, characterized in that: The upper surface of the filter screen plate (7) is integrally formed with two groups of solid parts (71), and the upper surfaces of the two groups of solid parts (71) are fixedly connected with handles (72), and the filter screen plate (7) is arranged in parallel with the horizontal heat exchange plate (8).

3. The waste heat recovery device for cooling section of a tunnel kiln according to claim 1, characterized in that: One end of the cooling kiln (1) is connected to a rapid cooling kiln (2), and one end of the rapid cooling kiln (2) is connected to a high-temperature kiln (3), and one end of the high-temperature kiln (3) is connected to a preheating kiln (4), and a waste heat discharge hole (41) is provided at the upper end of the preheating kiln (4).

4. A waste heat recovery device for cooling section of a tunnel kiln according to claim 3, characterized in that: The cooling kiln (1) is connected to the preheating kiln (4) via a waste heat drainage mechanism (5), and a waste heat recovery mechanism (6) is provided in the inner cavity of the waste heat drainage mechanism (5).

5. The waste heat recovery device for cooling section of a tunnel kiln according to claim 4, characterized in that: The waste heat drainage mechanism (5) comprises a connecting pipe (51), one end of the connecting pipe (51) is connected to a heat inlet pipe (52), and one end of the heat inlet pipe (52) is connected to a heat absorption cover (54), a first convex edge (541) is integrally formed on the outer side of the lower end of the heat absorption cover (54), the other end of the connecting pipe (51) is connected to a heat exhaust pipe (53), and one end of the heat exhaust pipe (53) is connected to a heat exhaust cover (55), and a second convex edge (551) is integrally formed on the outer side of the lower end of the heat exhaust cover (55).

6. The waste heat recovery device for cooling section of a tunnel kiln according to claim 5, characterized in that: The waste heat recovery mechanism (6) comprises a drive motor (61) and two groups of triangular fixing frames (65) installed in the inner cavity of the connecting pipe (51); a mounting portion (511) is provided on the outer side of the connecting pipe (51); the drive motor (61) is fixedly connected to the upper surface of the mounting portion (511); the output shaft of the drive motor (61) is drivingly connected to a rotating shaft (62); the lower end of the rotating shaft (62) passes through the connecting pipe (51) and is fixedly connected to a first bevel gear (63); a connecting shaft (67) is rotatably connected between the two groups of triangular fixing frames (65); one end of the connecting shaft (67) passes through one group of triangular fixing frames (65) and is fixedly connected to a second bevel gear (64); and the second bevel gear (64) is meshed with the first bevel gear (63).

7. The waste heat recovery device for cooling section of a tunnel kiln according to claim 6, characterized in that: An outer shaft (66) is sleeved on the outer side of the connecting shaft (67), and a plurality of groups of guide blades (68) are fixedly connected to the outer side of the outer shaft (66), and the plurality of groups of guide blades (68) are arranged in a circular array, the first flange (541) is fixedly connected to the top of the cooling kiln (1) by a plurality of groups of second screws (56), and the second flange (551) is fixedly connected to the top of the preheating kiln (4) by a plurality of groups of third screws (57).

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