Kiln tail air cooling mechanism of tunnel kiln

Abstract

The utility model discloses a kiln tail air cooling mechanism of a tunnel kiln, which comprises first air cooling devices, second air cooling devices, an air curtain, a heat recovery cover and a flue gas drainage device, kiln inner inclined planes are arranged below the inner side wall of the tunnel kiln, the first air cooling devices are arranged on the kiln inner inclined planes on two sides, and the second air cooling devices are arranged on the second air cooling devices. The second air cooling device is arranged on a sleeper between two I-shaped rails of the rail tunnel kiln; the air curtain is arranged beside the heat recovery cover; the inner side of the heat recovery cover is an arc-shaped cover, and the heat recovery cover is fixed to the center of the top face of the kiln. The flue gas drainage device is arranged at the top of the outer side of the kiln; the lower end of the flue gas drainage device is communicated with the heat recovery cover flange; a cross-flow fan impeller is arranged in the flue gas drainage device; an air outlet is formed in one side of the flue gas drainage device; the cross-flow fan impeller sends out heat flow below the heat recovery cover from an air outlet. After the kiln tail air cooling mechanism cools the fired materials, waste heat can be conveyed to the preheating section of the kiln through the flue gas drainage device to be recycled.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel kilns, and in particular relates to a kiln tail air cooling mechanism 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. Due to the increasing demand for refractory materials, the utilization rate of refractory production equipment has been improved.

[0003] In the existing tunnel kiln, since both ends of the tunnel kiln are open, the existing tunnel kiln usually adopts natural cooling at the discharge end, but this cooling method will lead to low cooling efficiency, and the waste heat flue gas generated after cooling is not effectively utilized, resulting in low thermal energy utilization rate. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and to provide a tunnel kiln tail air cooling mechanism.

[0005] A kiln tail air cooling mechanism of a tunnel kiln, comprising: a first air cooling device 1, a second air cooling device 2, an air curtain, a heat recovery hood 4, and a smoke guide 5. A narrow portion is provided at the lower part of the tunnel kiln, and both side walls of the tunnel kiln are provided with a kiln inner inclined surface at the transition part with the narrow portion. The kiln inner inclined surfaces on both sides of the tunnel kiln side walls are provided with the first air cooling device 1, and the second air cooling device 2 is arranged on the sleepers between two I-shaped rails of the track tunnel kiln; the air curtain comprises: a first air curtain 31, a second air cooling device 2, a heat recovery hood 4, and a smoke guide 5. The wind curtain 32, the first wind curtain 31 and the second wind curtain 32 are respectively arranged on both sides of the heat recovery hood 4; the inner side of the heat recovery hood 4 is an arc-shaped hood, and the heat recovery hood 4 is fixed at the center of the top surface of the kiln; the smoke deflector 5 is arranged on the top of the outer side of the kiln, and the lower end of the smoke deflector 5 is flange-connected with the heat recovery hood 4; a cross-flow fan impeller 54 is arranged in the smoke deflector 5; an air outlet 522 is arranged on one side of the smoke deflector 5; the cross-flow fan impeller 54 sends the hot flow out of the air outlet 522 below the heat recovery hood 4.

[0006] The first air cooling device 1 includes a left air cooling fan 11 and a right air cooling fan 12; the inner slopes of the kiln on both sides of the tunnel kiln side wall are the left kiln inner slope 811a and the right kiln inner slope 811b respectively, the left air cooling fan 11 is fixed on the left kiln inner slope 811a; the right air cooling fan 12 is fixed on the right kiln inner slope 811b; the included angle between the left kiln inner slope 811a and the right kiln inner slope 811b is 60 degrees.

[0007] The inner side of the heat recovery cover 4 is an arc-shaped cover, and the lower part of the heat recovery cover 4 is a hot air flow recovery port 42; a guide pipe 43 is arranged above the heat recovery cover 4; and a connecting flange is arranged at the end of the guide pipe 43.

[0008] The smoke deflector 5 comprises: a soundproof cover 51, an induced draft inner cavity 52, a motor bracket 53, a crossflow fan impeller 54, and an induced draft motor 55; the induced draft inner cavity 52 is arranged in the soundproof cover 51; an air inlet 521 is arranged below the induced draft inner cavity 52, a cavity flange is arranged at the air inlet 521, and the air inlet 521 is flange-connected to the guide pipe 43; an air outlet 522 is arranged on one side of the induced draft inner cavity 52; the motor bracket 53 is arranged at the lower end of the inner side of the induced draft inner cavity 52; a plurality of air guide holes 531 are arranged on the motor bracket 53; the induced draft motor 55 is fixed on the motor bracket 53; the axis center of the crossflow fan impeller 54 is fixedly connected to the power output shaft of the induced draft motor 55.

[0009] The utility model provides a tunnel kiln tail air cooling mechanism, which includes: a first air cooling device 1, a second air cooling device 2, an air curtain, a heat recovery hood 4, and a smoke deflector 5. The tunnel kiln is provided with a kiln inner inclined surface below the inner side wall of the kiln, and the kiln inner inclined surfaces on both sides are provided with the first air cooling device 1. The second air cooling device 2 is provided on the sleepers between two I-shaped rails of the track tunnel kiln; the air curtain is provided beside the heat recovery hood 4; the inner side of the heat recovery hood 4 is an arc-shaped hood, and the heat recovery hood 4 is fixed at the center of the kiln top surface; the smoke deflector 5 is provided at the top of the kiln outer side, and the lower end of the smoke deflector 5 is connected with the heat recovery hood 4 by flange connection; a cross-flow fan impeller 54 is provided in the smoke deflector 5; an air outlet 522 is provided on one side of the smoke deflector 5; and the cross-flow fan impeller 54 sends out the hot flow air outlet 522 below the heat recovery hood 4. After the kiln tail air cooling mechanism cools down the fired material, the residual heat can be sent to the kiln preheating section for reuse through the smoke deflector 5. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the use status of the kiln tail air cooling mechanism of a tunnel kiln;

[0011] Figure 2 This is a structural schematic diagram of a kiln tail air cooling mechanism of a tunnel kiln;

[0012] Figure 3 This is a cooling schematic diagram of a kiln tail air cooling mechanism of a tunnel kiln;

[0013] Figure 4 This is a schematic diagram of the heat recovery cover structure of a tunnel kiln tail air cooling mechanism;

[0014] Figure 5 This is a schematic diagram of the internal structure of the smoke guider of the kiln tail air cooling mechanism of a tunnel kiln;

[0015] Figure 6 This is a schematic diagram of the internal structure of the air-inducing inner cavity of the kiln tail air-cooling mechanism of a tunnel kiln;

[0016] In the figure: 1. first air cooling device, 11. left air cooling fan, 12. right air cooling fan, 2. second air cooling device, 31. first air curtain, 32. second air curtain, 4. heat recovery cover, 41. connecting rod, 42. hot air flow recovery port, 43. guide pipe, 5. smoke guide, 51. sound insulation cover, 52. induced draft inner cavity, 521. air inlet, 522. air outlet, 53. motor bracket, 531. air guide hole, 54. cross flow fan impeller, 55. induced draft motor, 81. rail-type tunnel kiln, 811a. left kiln inner slope, 811b. right kiln inner slope, 812. curved dome, 82. track, 83. tunnel kiln car, 832. vent. DETAILED DESCRIPTION

[0017] A tunnel kiln tail air cooling mechanism is installed in a track-type tunnel kiln, a component of the cooling section. The technical scheme will be further clearly and completely described in conjunction with the accompanying drawings. The described embodiment is only a part of the technical scheme, not all of the embodiments. Based on this technical scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this utility model. Example

[0018] See also Figures 1 to 6 As shown, a tunnel kiln tail air cooling mechanism comprises: a first air cooling device 1, a second air cooling device 2, an air curtain, a heat recovery hood 4, and a smoke deflector 5;

[0019] The track-type tunnel kiln 81 has a narrow part at the bottom of the kiln, and the top of the track-type tunnel kiln 81 is a curved dome 812; the track 82 is arranged in the middle of the bottom surface of the narrow part; the track 82 is provided with a tunnel kiln car 83 that can be moved by traction; the tunnel kiln car 83 is provided with a kiln car bracket plate, and the kiln car bracket plate is provided with a vent 832 for convenient gas circulation; the side walls on both sides of the tunnel kiln are provided with a kiln inner slope at the transition part with the narrow part; the kiln inner slope is divided into a left kiln inner slope 811a and a right kiln inner slope 811b; the angle between the left kiln inner slope 811a and the right kiln inner slope 811b is 60 degrees;

[0020] The left kiln inner inclined surface 811a and the right kiln inner inclined surface 811b may also be supported by brackets having the same inclined surface.

[0021] The lowest points of the left kiln inner inclined surface 811a and the right kiln inner inclined surface 811b are in the same plane as the kiln car bracket plate.

[0022] The first air cooling device 1 comprises: a left air cooling fan 11 and a right air cooling fan 12; the left air cooling fan 11 is fixed on the left kiln inner inclined surface 811a; the right air cooling fan 12 is fixed on the right kiln inner inclined surface 811b.

[0023] The second air cooling device 2 is arranged on the sleepers between two I-shaped rails of the track 82 .

[0024] The inner side of the heat recovery cover 4 is an arc-shaped cover, and the four corners of the heat recovery cover 4 are provided with connecting rods 41; the heat recovery cover 4 is fixed at the center of the arc dome 812 through the connecting rods 41;

[0025] The wind curtain comprises: a first wind curtain 31 and a second wind curtain 32, which are respectively arranged on both sides of the heat recovery cover 4; the first wind curtain 31 and the second wind curtain 32 recover the waste heat in the cooling section of the kiln.

[0026] Below the heat recovery hood 4 is a hot air flow recovery port 42 ; above the heat recovery hood 4 is a guide pipe 43 ; the end of the guide pipe 43 is provided with a connecting flange; the guide pipe 43 is connected to the lower end flange of the smoke guider 5 .

[0027] The smoke deflector 5 comprises: a soundproof cover 51, an induced draft inner cavity 52, a motor bracket 53, a cross-flow fan impeller 54, and an induced draft motor 55;

[0028] The upper end of the air induction cavity 52 is cylindrical, and the air induction cavity 52 is arranged in the soundproof cover 51; an air inlet 521 is arranged below the air induction cavity 52, and a cavity flange is arranged at the air inlet 521, and the air inlet 521 is sealed and connected with the upper end of the guide pipe 43 through the flange; an air outlet 522 is arranged on one side of the air induction cavity 52;

[0029] The diameter of the air outlet 522 is smaller than the radius of the cylindrical air induction cavity 52 at the upper end; one side of the air outlet 522 is inscribed in the cylindrical air induction cavity 52;

[0030] The motor bracket 53 is arranged at the lower end of the inner side of the induced draft inner cavity 52; a plurality of air guide holes 531 are arranged on the motor bracket 53; the induced draft motor 55 is fixed on the motor bracket 53; the axis of the crossflow fan impeller 54 is fixedly connected to the power output shaft of the induced draft motor 55; that is, the induced draft motor 55 drives the crossflow fan impeller 54 to rotate; the air outlet 522 is arranged on the discrete lift-off angle of the crossflow fan impeller 54;

[0031] The heat flow under the heat recovery cover 4 is sent out from the air outlet 522 through the cross-flow fan impeller 54; the air outlet 522 can transport the waste heat hot air to the waste heat section of the kiln through a conveying pipeline for preheating before firing.

Claims

1. A tunnel kiln tail air cooling mechanism, comprising: A first air cooling device (1), a second air cooling device (2), an air curtain, a heat recovery hood (4), and a smoke guide (5); a narrow portion is provided at the lower part of the tunnel kiln, and both side walls of the tunnel kiln are provided with a kiln inner inclined surface at the transition part with the narrow portion, characterized in that: the kiln inner inclined surfaces on both sides of the tunnel kiln side walls are provided with a first air cooling device (1), and the second air cooling device (2) is arranged on the sleepers between two I-shaped rails of the track tunnel kiln; the air curtain comprises: a first air curtain (31), a second air curtain (32), and the first air curtain (31) and a second wind curtain (32) are respectively arranged on both sides of the heat recovery hood (4); the inner side of the heat recovery hood (4) is an arc-shaped hood, and the heat recovery hood (4) is fixed at the center of the top surface of the kiln; the smoke deflector (5) is arranged on the top of the outer side of the kiln, and the lower end of the smoke deflector (5) is flange-connected to the heat recovery hood (4); a cross-flow fan impeller (54) is arranged in the smoke deflector (5); an air outlet (522) is arranged on one side of the smoke deflector (5); and the cross-flow fan impeller (54) sends the hot flow out of the air outlet (522) below the heat recovery hood (4).

2. The tunnel kiln tail air cooling mechanism according to claim 1 is characterized in that: The first air cooling device (1) comprises a left air cooling fan (11) and a right air cooling fan (12); the kiln inner inclined surfaces on both sides of the tunnel kiln side wall are respectively a left kiln inner inclined surface (811a) and a right kiln inner inclined surface (811b); the left air cooling fan (11) is fixed on the left kiln inner inclined surface (811a); the right air cooling fan (12) is fixed on the right kiln inner inclined surface (811b); the inclined surface included angle of the left kiln inner inclined surface (811a) and the right kiln inner inclined surface (811b) is 60 degrees.

3. The kiln tail air cooling mechanism of the tunnel kiln according to claim 2 is characterized in that: The inner side of the heat recovery cover (4) is an arc-shaped cover, and the lower part of the heat recovery cover (4) is a hot air flow recovery port (42); a guide pipe (43) is provided above the heat recovery cover (4); and a connecting flange is provided at the end of the guide pipe (43).

4. The tunnel kiln tail air cooling mechanism according to claim 3 is characterized in that: The smoke deflector (5) comprises: a soundproof cover (51), an induced draft inner cavity (52), a motor bracket (53), a crossflow fan impeller (54), and an induced draft motor (55); the induced draft inner cavity (52) is arranged in the soundproof cover (51); an air inlet (521) is arranged below the induced draft inner cavity (52); a cavity flange is arranged at the air inlet (521), and the air inlet (521) is flange-connected to the guide pipe (43); an air outlet (522) is arranged on one side of the induced draft inner cavity (52); the motor bracket (53) is arranged at the lower end of the inner side of the induced draft inner cavity (52); a plurality of air guide holes (531) are arranged on the motor bracket (53); the induced draft motor (55) is fixed on the motor bracket (53); and the axis of the crossflow fan impeller (54) is fixedly connected to the power output shaft of the induced draft motor (55).

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