Cooling air circulating device for decomposition kiln outside kiln

Abstract

The utility model relates to an outside-kiln decomposition kiln cooling air circulation device which comprises a kiln body (11), an installation ring (21) is fixedly arranged on a support (10), the installation ring (21) is rotationally connected with the kiln body (11), and an air exhaust assembly (22) is arranged at the top of the installation ring (21). An air blowing assembly (30) is fixedly arranged on the bracket (10); after the cement clinker is produced, the kiln body (11) is controlled to continuously rotate so as to turn over the cement clinker in the kiln body (11); cold air flows through the air pipes (31) and is blown out from the air blowing holes (33) in the air plates (32) so as to blow and cool cement clinker in a turning state in the kiln body (11) in a multi-position and multi-angle mode, airflow circulation is formed through the exhaust assembly (22), the cooling effect is good due to the arrangement of the air plates (32) and the air blowing holes (33), and meanwhile the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, in particular to a cooling air circulation device for an externally fired preheater kiln. Background Art

[0002] In the production process of cement, it is usually necessary to first mix calcareous raw materials, siliceous raw materials, aluminous raw materials, and ferrous raw materials in a certain ratio and grind them to a certain fineness to form cement raw meal. Then, the cement raw meal is first decomposed by a preheater decomposer to about 95% of calcium carbonate. The heated raw meal (about 870°C) after preheating and decomposition enters the rotary kiln through the material inlet pipe connecting the preheater and the cement kiln, and is fully heated to calcine the cement raw meal to obtain cement clinker. The produced cement clinker has a high temperature and needs to be cooled before discharging to facilitate subsequent processing and storage. However, the existing cooling devices have poor cooling effects and low cooling efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that the existing cooling devices have poor cooling effects and low cooling efficiency.

[0004] To solve the above problems, the utility model provides a cooling air circulation device for an externally fired preheater kiln, which includes a kiln body rotatably arranged on a bracket. An installation ring is fixedly arranged on the bracket, and the installation ring is rotatably connected with the kiln body. An exhaust component is arranged at the top of the installation ring; a blowing component is fixedly arranged on the bracket. The blowing component includes an air duct and air plates. A plurality of air plates are circumferentially and spacedly fixed on the air duct, and the air plates extend into the interior of the kiln body. A plurality of blowing holes communicating with the interior of the air duct are formed on the side surfaces of the air plates.

[0005] The cooling air circulation device for an externally fired preheater kiln provided by the utility model further has the following technical features:

[0006] A wind guiding hole is formed in the air plate along its length direction. One end of the wind guiding hole is communicated with the interior of the air duct, and the wind guiding hole is communicated with the blowing holes. The plurality of blowing holes are arranged along the length direction of the air plate.

[0007] One end of the air duct is closed and provided with an air plate. The other end of the air duct is communicated with one end of a hose through a connecting ring, and the other end of the hose is communicated with the air supply end of a fan. The fan is arranged on the bracket.

[0008] The exhaust component includes an exhaust duct and an exhaust fan. An exhaust hole is formed at the top of the installation ring. The exhaust duct is fixed outside the installation ring and corresponds to the exhaust hole. A motor is fixed in the exhaust duct, and an exhaust fan is fixed on the output shaft of the motor. A filter screen is fixedly arranged in the exhaust hole.

[0009] A scraper is arranged at the bottom of the filter screen.

[0010] A central gear is fixed on the output shaft of the motor. The central gear meshes with the planet gears, and the planet gears mesh with the internal gear ring. The planet gears and the internal gear ring are both rotatably installed in the exhaust holes. The internal gear ring is fixed with a rotating shaft through a plurality of connecting rods. The rotating shaft passes through the filter screen and is fixed with a scraper.

[0011] One end of the planet gear is rotatably connected to one end of a support rod, and the other end of the support rod is fixed to an installation ring.

[0012] The rotating shaft is coaxially arranged with the output shaft of the motor.

[0013] A high-temperature inner lining is provided in the kiln body.

[0014] The utility model has the following beneficial effects: After the cement clinker is produced, the kiln body is controlled to continue rotating to turn over the cement clinker therein; the cold air flows through the air duct and is blown out from the blowing holes on the air plate, so as to blow and cool the cement clinker in the kiln body in a tumbling state at multiple positions and angles, and an air flow circulation is formed through the exhaust assembly. The arrangement of a plurality of air plates and blowing holes enables good cooling effect and improves the cooling efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the utility model;

[0016] Figure 2 is Figure 1 the cross-sectional view of the air plate in

[0017] Figure 3 is the exploded view of the parts of the exhaust assembly;

[0018] Figure 4 is the axonometric view of the exhaust assembly;

[0019] Figure 5 is Figure 1 the partial axonometric view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0021] Such as Figures 1 to 5As shown in the figure, the cooling air circulation device of the precalcining kiln of the utility model includes a kiln body 11 rotatably arranged on a bracket 10. An installation ring 21 is fixedly arranged on the bracket 10. The installation ring 21 is rotatably connected to the kiln body 11. An exhaust air assembly 22 is arranged at the top of the installation ring 21. A blowing assembly 30 is fixedly arranged on the bracket 10. The blowing assembly 30 includes an air duct 31 and an air plate 32. A plurality of air plates 32 are fixedly arranged at circumferential intervals of the air duct 31. The air plates 32 extend into the interior of the kiln body 11. A plurality of blowing holes 33 communicating with the interior of the air duct 31 are arranged on the side surface of the air plate 32.

[0022] After the cement clinker is produced, the kiln body 11 is controlled to continue rotating to turn the cement clinker therein. The cold air flows through the air duct 31 and blows out from the blowing holes 33 on the air plates 32, so as to blow and cool the cement clinker in the tumbling state in the kiln body 11 at multiple positions and angles, and form an air flow cycle through the exhaust air assembly 22. The arrangement of the plurality of air plates 32 and blowing holes 33 makes the cooling effect good and improves the cooling efficiency at the same time.

[0023] Among them, referring to Figure 1 , the kiln body 11 includes a front section and a rear section, and is respectively rotatably and sealingly connected to both ends of the installation ring 21. The installation position of the installation ring 21 can be selected according to actual applications. For example, it can be arranged at the tail of the kiln body 11. Both the front section and the rear section of the kiln body 11 can be rotatably installed on the bracket 10, and are respectively provided with corresponding slewing rings, drive motors and gears. The driving method and installation method of the rotatable setting of the kiln body 11 are prior arts and will not be elaborated here.

[0024] Among them, the air duct 31 is fixedly arranged with the bracket 10. Specifically, the air duct 31 can extend out of the kiln body 11 and be fixed on the bracket 10, or the air duct 31 can be fixed on the installation ring 21 to shorten the axial length of the air duct 31, which can be selected according to actual applications.

[0025] Among them, the air plates 32 are arranged corresponding to the exhaust air assembly 22. Of course, the two can also be arranged staggeredly.

[0026] Preferably, referring to Figure 2 , a wind guiding hole 34 is arranged along the length direction of the air plate 32. One end of the wind guiding hole 34 is communicated with the interior of the air duct 31. The wind guiding hole 34 is communicated with the blowing holes 33. A plurality of blowing holes 33 are arranged along the length direction of the air plate 32.

[0027] Among them, at least two wind guiding holes 34 are arranged along the width direction of the air plate 32 to increase the blowing area and improve the cooling effect and efficiency.

[0028] Preferably, one end of the air duct 31 is closed and provided with an air plate 32. The other end of the air duct 31 communicates with one end of a hose 36 through a connecting ring 35. The other end of the hose 36 communicates with the air supply end of a fan 37, and the fan 37 is arranged on a bracket 10.

[0029] Preferably, referring to Figure 3 , 4 , 5, the exhaust assembly 22 includes an exhaust duct 23 and an exhaust fan 24. An exhaust hole 25 is formed at the top of the mounting ring 21. The exhaust duct 23 is fixed outside the mounting ring 21 and is arranged corresponding to the exhaust hole 25. A motor 26 is fixed in the exhaust duct 23. An exhaust fan 24 is fixed on the output shaft of the motor 26. A filter screen 27 is fixedly arranged in the exhaust hole 25.

[0030] The output shaft of the motor 26 drives the exhaust fan 24 to rotate, so as to cooperate with the blowing assembly 30 to form an air flow cycle. At the same time, the filter screen 27 can filter the cement clinker diffused everywhere in the kiln body 11 due to rotary turning and blowing cooling, so as to avoid polluting the environment.

[0031] Wherein, the motor 26 is fixed in the exhaust duct 23 through a mounting rod 28; the exhaust duct 23 can communicate with the atmosphere or communicate with other processes that can utilize the exhausted hot air, so as to make full use of the waste heat.

[0032] Preferably, a scraper 41 is arranged at the bottom of the filter screen 27.

[0033] So as to rotate and scrape the cement clinker attached to the bottom of the filter screen 27.

[0034] Preferably, a central gear 42 is fixed on the output shaft of the motor 26. The central gear 42 meshes with a planet gear 43. The planet gear 43 meshes with an internal gear ring 44. The planet gear 43 and the internal gear ring 44 are both rotatably installed in the exhaust hole 25. The internal gear ring 44 is fixed with a rotating shaft 46 through a plurality of connecting rods 45. The rotating shaft 46 passes through the filter screen 27 and is fixed with the scraper 41.

[0035] The output shaft of the motor 26 drives the central gear 42 to rotate, drives the internal gear ring 44 to rotate slowly through the planet gear 43, so as to drive the rotating shaft 46 and the scraper 41 to rotate slowly, so as to rotate and scrape the cement clinker attached to the bottom of the filter screen 27, and avoid damaging the filter screen 27 due to the too fast rotation of the scraper 41.

[0036] Wherein, the rotating shaft 46 is rotatably connected with the filter screen 27.

[0037] Preferably, the planet gear 43 is rotatably connected with one end of a support rod 47. The other end of the support rod 47 is fixed with the mounting ring 21.

[0038] Preferably, the rotating shaft 46 is coaxially arranged with the output shaft of the motor 26.

[0039] Preferably, a high-temperature inner lining is provided inside the kiln body 11.

[0040] Among them, high-temperature inner linings are provided inside both the kiln body 11 and the mounting ring 21, and both the air blowing assembly 30 and the exhaust air assembly 22 are made of high-temperature resistant materials.

[0041] The working principle of the present utility model is as follows:

[0042] After the cement clinker is produced, the kiln body 11 is controlled to continue rotating to turn the cement clinker inside it; the cold air flows through the fan 37, the hose 36, and the connecting ring 35 and into the inside of the air duct 31, and flows out from the air guiding holes 34 on the air plate 32 into the air blowing holes 33 and blows out, so as to realize blowing and cooling the cement clinker in a tumbling state inside the kiln body 11 at multiple positions and angles, and form an air flow circulation through the exhaust air assembly 22. The setting of multiple air plates 32 and air blowing holes 33 makes the cooling effect good and improves the cooling efficiency at the same time;

[0043] When the exhaust air assembly 22 works, the output shaft of the motor 26 drives the exhaust fan 24 to rotate to cooperate with the air blowing assembly 30 to form an air flow circulation. At the same time, the filter screen 27 can filter the cement clinker that diffuses everywhere inside the kiln body 11 due to rotary tumbling and blowing and cooling, so as to avoid polluting the environment; at the same time, the output shaft of the motor 26 drives the central gear 42 to rotate, drives the internal gear ring 44 to rotate slowly through the planet gear 43, so as to drive the rotating shaft 46 and the scraper 41 to rotate slowly, so as to rotate and scrape the cement clinker attached to the bottom of the filter screen 27, and avoid damaging the filter screen 27 due to the too fast rotation of the scraper 41.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A cooling air circulation device for an external decomposition kiln, comprising a kiln body (11) rotatably mounted on a support (10), characterized in that: A mounting ring (21) is fixedly provided on the bracket (10), the mounting ring (21) is rotatably connected to the kiln body (11), and an exhaust assembly (22) is provided on the top of the mounting ring (21); a blowing assembly (30) is fixedly provided on the bracket (10), the blowing assembly (30) comprises an air duct (31) and an air plate (32), a plurality of air plates (32) are fixedly provided at intervals in the circumferential direction of the air duct (31), the air plates (32) extend into the interior of the kiln body (11), and a plurality of blowing holes (33) are provided on the side of the air plate (32) and are in communication with the interior of the air duct (31).

2. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 1 is characterized in that: The wind plate (32) is provided with an air guide hole (34) along its length direction, one end of the air guide hole (34) is connected to the inside of the air duct (31), the air guide hole (34) is connected to the blowing hole (33), and a plurality of blowing holes (33) are provided along the length direction of the wind plate (32).

3. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 1, characterized in that: One end of the air duct (31) is closed and provided with an air plate (32); the other end of the air duct (31) is connected to one end of a hose (36) via a connecting ring (35); the other end of the hose (36) is connected to an air supply end of a fan (37); and the fan (37) is arranged on the bracket (10).

4. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 1, characterized in that: The exhaust assembly (22) comprises an exhaust pipe (23) and an exhaust fan (24); an exhaust hole (25) is provided at the top of the mounting ring (21); the exhaust pipe (23) is fixed outside the mounting ring (21) and is arranged corresponding to the exhaust hole (25); a motor (26) is fixed inside the exhaust pipe (23); the exhaust fan (24) is fixed on the output shaft of the motor (26); and a filter (27) is fixed inside the exhaust hole (25).

5. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 4, characterized in that: A scraper (41) is provided at the bottom of the filter screen (27).

6. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 5, characterized in that: A central gear (42) is fixed on the output shaft of the motor (26), the central gear (42) meshes with the planetary gear (43), the planetary gear (43) meshes with the inner gear ring (44), the planetary gear (43) and the inner gear ring (44) are both rotatably mounted in the exhaust hole (25), the inner gear ring (44) is fixed with a rotating shaft (46) via a plurality of connecting rods (45), the rotating shaft (46) passes through the filter screen (27) and is fixed to the scraper (41).

7. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 6, characterized in that: The planetary gear (43) is rotatably connected to one end of a support rod (47), and the other end of the support rod (47) is fixed to a mounting ring (21).

8. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 6, characterized in that: The rotating shaft (46) is coaxially arranged with the output shaft of the motor (26).

9. The cooling air circulation device for the decomposition kiln outside the kiln according to claim 1, characterized in that: The kiln body (11) is provided with a high-temperature lining.

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