CN211696002U

CN211696002U - Rotary furnace with tube bundle indirect cooling function

Info

Publication number: CN211696002U
Application number: CN201922165498.8U
Authority: CN
Inventors: 刘智祥; 杜志敏; 王苗; 何建祥; 许泽华; 王娜; 王春江; 张�林
Original assignee: Xi'an Sunrise Industrial Co ltd
Current assignee: Xi'an Sunrise Industrial Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-10-16
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a tube bundle indirect cooling rotary furnace, which comprises a furnace body, a supporting device, a rolling ring, a large gear ring, a sealing device, a transmission device, a feeding device and a discharging device, wherein the furnace body is supported by the rolling ring I and the rolling ring II on the supporting device, and the transmission device drives the furnace body to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the furnace body, the feeding device, the discharging device and the furnace body are sealed by adopting sealing devices, and a closed cooling circulation system is arranged in the furnace body; and the elbows on the water inlet pipe bundle and the water return pipe bundle in the cooling circulating system are provided with half pipe structures. The rotary furnace adopts a continuous indirect cooling mode, a closed cooling circulation system is arranged in the rotary furnace, cooling water is not in direct contact with materials, water vapor is not generated during cooling, the investment of the cooling water is reduced, the cost is reduced, and the economic benefit is improved.

Description

Rotary furnace with tube bundle indirect cooling function

Technical Field

The utility model belongs to a rotary cooling furnace for cooling solid materials in the industrial production process, in particular to a rotary furnace for indirectly cooling tube bundles.

Background

The cooling treatment of solid materials with higher temperature in the existing industrial production process generally adopts the water spraying cooling outside a furnace body. The working principle of cooling materials by a water spraying method is as follows: the material with higher temperature is sent into the furnace body through screw conveyer, and the material flows in the furnace body, has water continuous shower outside the furnace body at rotatory furnace body surface, carries out indirect heat transfer with the material in the furnace body to realize the cooling to the material, the material after the cooling is discharged through the ejection of compact case.

The existing water spraying cooling method adopted by domestic industry for material cooling treatment can generate a large amount of water vapor in the cooling process, the generated steam can not be recycled, the loss of cooling water is large, circulating water for cooling must be periodically supplemented to ensure sufficient water quantity, the cost is high, and water resources are wasted. In cold areas, ice is easily formed in winter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tube bundle indirect cooling rotary furnace. The rotary furnace adopts a continuous indirect cooling mode, a closed cooling circulation system is arranged in the rotary furnace, cooling water is not in direct contact with materials, water vapor is not generated during cooling, the investment of the cooling water is reduced, the cost is reduced, and the economic benefit is improved.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

according to an embodiment provided by the utility model, the utility model provides a tube bundle indirect cooling rotary furnace, which comprises a furnace body, a supporting device, a rolling ring, a big gear ring, a sealing device, a transmission device, a feeding device and a discharging device, wherein the furnace body is supported by the rolling rings I and II on the supporting device, and the transmission device drives the furnace body to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the furnace body, the feeding device, the discharging device and the furnace body are sealed by adopting sealing devices, and a closed cooling circulation system is arranged in the furnace body; and the elbows on the water inlet pipe bundle and the water return pipe bundle in the cooling circulating system are provided with half pipe structures.

To above-mentioned technical scheme, the utility model discloses still further preferred scheme.

Preferably, the feeding device comprises a feeding conveyor, a feeding box and a sealing device, and the end part of the feeding box is provided with the feeding conveyor extending into the front end inside the furnace body.

Preferably, the discharging device comprises a discharging box, a discharging port and a sealing device; and a discharging opening is arranged on the furnace body at the covering part of the discharging box.

Preferably, the sealing means comprises a labyrinth seal and/or a flexible seal; the labyrinth seal consists of a static seal ring and a dynamic seal ring; the flexible seal comprises a furnace body seal backing plate and a wear-resistant block which are arranged on the furnace body, a spring piece and a flexible pad are compressed on the wear-resistant block through a pressing plate I, and the other ends of the spring piece and the flexible pad are compressed through a pressing plate II and connected with a discharge box.

Preferably, the spring piece is externally provided with a hook, the end part of the hook is wound with a steel wire rope, and the two ends of the steel wire rope are added with balancing weights to adjust the fit tightness between the wear-resistant block and the sealing base plate.

Preferably, the furnace body is internally provided with a closed cooling circulation system which comprises a central pipe connected with a flange at the tail part of the furnace body, the central pipe is connected with a water inlet pipe bundle through a water inlet ring pipe and is connected with a water return pipe bundle through a water return ring pipe, and the water inlet pipe bundle and the water return pipe bundle are connected through elbows I and II to form a loop; the wall thickness of the elbow I and the elbow II is not less than 3 mm.

Preferably, the water inlet pipe bundle and the water return pipe bundle are movably supported on the pipe frame.

The feeding conveyor comprises a driving device and a spiral connected through a coupler, wherein the spiral is provided with a spiral blade, and the material is conveyed into the front end inside the furnace body through the spiral blade.

The feeding conveyor can be replaced by a feeding chute, the feeding chute is connected with the feeding box, the outlet end of the feeding chute extends into the furnace body, and materials are conveyed into the front end inside the furnace body through the feeding chute.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1) the rotary furnace adopts a continuous indirect cooling mode, a closed cooling circulation system is arranged in the rotary furnace, cooling water is not in direct contact with materials, water vapor is not generated during cooling, the investment of the cooling water is reduced, the cost is reduced, and the economic benefit is improved.

2) The sealing type between the feeding box, the discharging box and the furnace body adopts labyrinth seal and flexible seal combined seal, so that the equipment has good sealing performance, harmful gas and dust in the equipment are prevented from escaping, the environmental pollution is reduced, and the safety of the operation of the equipment is ensured.

3) The half-pipe structure is arranged at the elbow of the heat exchange system, so that the wall thickness of the elbow is increased, the leakage at the elbow caused by long-term erosion and corrosion of materials is prevented, and the service life of the heat exchange system is prolonged.

Drawings

In order that the present invention may be more readily and clearly understood, reference is now made to the following detailed description of the invention taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of the structure of a rotary furnace for indirect cooling of tube bundles according to the present invention.

FIG. 2 is a schematic diagram of a heat exchange system.

Fig. 3 is a schematic view of the sealing device.

Fig. 4 is a schematic view of the feed conveyor configuration.

The reference numbers in the figures denote: 1. a feed conveyor; 2. a feeding box; 3. a sealing device; 4. rolling a ring I; 5. a furnace body; 6. a large gear ring; 7. rolling a ring II; 8. a discharging box; 9. a rotary joint; 10. a swivel joint mount; 11. a discharge port; 12. a riding wheel blocking device; 13. a transmission device; 14. a riding wheel device; 15. a balancing weight; 18. a return water pipe bundle; 19. a water inlet pipe bundle; 20. a pipe frame; 21. a discharging opening; 22. a water inlet ring pipe; 23. a water return ring pipe; 24. a central tube; 25. a striker plate; 26. an elbow I; 27. an elbow II; 28. sealing the base plate; 29. a wear-resistant block; 30. a flexible pad; 31. a spring plate; 32. pressing a plate I; 33. hooking; 34. a wire rope; 35. pressing a plate II; 36. a drive device; 37. a coupling; 38. spiraling; 39. a housing; 40. a helical blade; 41. a shaft sleeve; 42. sealing the static ring; 43. and sealing the movable ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, the rotary furnace with the tube bundle indirect cooling comprises a furnace body 5, wherein a rolling ring I4 and a rolling ring II 7 are arranged on the furnace body 5 according to the principle of equal bending moment and are respectively supported by a riding wheel blocking device 12 and a riding wheel device 14; the large gear ring 6 drives the furnace body 5 to rotate on the supporting device through meshing transmission with a small gear on the transmission device 13; the front end of the furnace body 5 is provided with a feeding box 2, a sealing device 3 is arranged between the feeding box 2 and the furnace body 5 for sealing, and the feeding box is connected with a feeding conveyor 1; the discharging box 8 is positioned at the rear end of the furnace body 5 and is provided with a discharging hole 11; the two ends of the discharging box 8 and the furnace body 5 are sealed by a sealing device 3; the tail part of the furnace body 5 is provided with a rotary joint 9 and a rotary joint bracket 10 of a supporting device thereof.

As shown in fig. 2, the feeding conveyor 1 extends into the front end of the interior of the furnace body 5 through the feeding box 2 to feed the material into the furnace body 5; half-pipe structures are arranged on the elbow I26 and the elbow II 27, so that the wall thickness of the elbow is increased to be not less than 3mm, and the leakage of the elbow caused by long-term erosion and corrosion of materials is prevented; a plurality of rows of pipe racks 20 are arranged in the furnace body 5 and used for supporting a water inlet pipe bundle 19 and a water return pipe bundle 18 of a heat exchange system, and each row of pipe racks 20 is divided into a plurality of blocks which are arranged on the inner wall of the furnace body in a staggered way, so that smooth movement of materials in the furnace body 5 can be ensured; the furnace body is provided with a furnace body discharging opening 21 at the position of the discharging box, and a material baffle plate 25 is arranged behind the discharging box to prevent the material from entering the heat exchange system ring pipe area.

The heat exchange system is arranged in the furnace body 5 and mainly comprises a water inlet pipe bundle 19, a water return pipe bundle 18, a water inlet ring pipe 22, a water return ring pipe 23, a central pipe 24 and the like. The central pipe 24 is connected with a flange at the tail part of the furnace body 5, the water inlet pipe bundle 19 is connected with the central pipe 24 through the water inlet ring pipe 22, the water return pipe bundle 18 is connected with the central pipe 24 through the water return ring pipe 23, the water inlet pipe bundle 19 and the water return pipe bundle 18 are connected through the elbow I26 and the elbow II 27 to form a loop, and cooling water enters and exits the heat exchange system through the central pipe 24. The water inlet pipe bundle 19 and the water return pipe bundle 18 are movably supported on a pipe frame 20 so as to be freely extended when expanded by heat.

A discharge box 8 is arranged at a discharge opening 21 on the furnace body 5, and cooled solid materials enter the discharge box 8 through the discharge opening 21 on the furnace body 5 and are discharged from a discharge hole 11 at the bottom of the discharge box 8 to enter the next working procedure; the two sides of the discharging box 8 and the furnace body 5 are sealed by a sealing device 3.

As shown in fig. 3, the sealing device 3 is mainly composed of two parts, a labyrinth seal and a flexible seal. The labyrinth seal is composed of a static seal ring 42 and a dynamic seal ring 43. The flexible seal comprises a wear-resistant block 29, a flexible pad 30, a spring piece 31, a pressing plate I32, a hook 33, a steel wire rope 34, a pressing plate II 35, a balancing weight 15 and the like. One side of a spring leaf 31 is pressed by a pressing plate I32 and connected with a wear-resistant block 29, the other side of the spring leaf is pressed by a pressing plate II 35 and connected with a discharging box 8, the wear-resistant block 29 is tightly attached to a furnace body sealing base plate 28 under the action of the spring leaf 31, the outside of the pressing plate I32 is wound by a steel wire rope 34 through a hook 33, and balancing weights 15 are added at two ends of the steel wire rope 34 to adjust the attachment between the wear-resistant block 29 and the sealing base plate 28, so that good sealing performance is guaranteed, and the wear-resistant block 29 is; a layer of flexible pad 30 is arranged under the spring leaf 31 to achieve better sealing effect.

As shown in fig. 4, the feeding conveyor 1 mainly comprises a driving device 36, a coupling 37, a screw 38, a housing 39, a helical blade 40 and other components, wherein the driving device 36 drives the screw 38 to rotate, and the material is conveyed to the front end inside the furnace body 5 through the helical blade 40 on the screw 38; a sleeve 41 is provided at the discharge end of the feed conveyor 1 to support the screw 38, so that a certain clearance is maintained between the screw blade 40 of the screw 38 and the housing 39 to prevent the screw blade 40 from being worn too fast.

The feeding conveyor extends into the front end of the interior of the furnace body through the feeding box, and the material is fed into the furnace body for cooling; the sealing type between the feeding box and the furnace body adopts the combination of labyrinth seal and flexible seal, and has good sealing property; a tube array type heat exchange system is arranged in the furnace body, the heat exchange system consists of a plurality of circles of tube bundles and a tail central tube which are concentrically arranged, so that enough heat exchange area is ensured for cooling materials, cooling water indirectly exchanges heat with the materials through tube walls through a tube bundle loop in the furnace body, the materials are continuously, rapidly and uniformly cooled, and the cooling water is discharged from a rotary joint at the tail of the furnace body after heat exchange; the material is discharged from a discharge port at the bottom of a discharge box at the rear end of the furnace body after being cooled; the sealing type between the two sides of the discharging box and the furnace body adopts the combination of labyrinth seal and flexible seal which are the same as those of the feeding box, so that the sealing device has good sealing performance and prevents harmful gas and dust in the device from escaping.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims

1. A rotary furnace with tube bundle indirect cooling comprises a furnace body (5), a supporting device, rolling rings, a large gear ring (6), a sealing device (3), a transmission device (13), a feeding device and a discharging device, wherein the furnace body (5) is supported by the rolling rings I and II (4 and 7) on the supporting device, and the transmission device (13) drives the furnace body (5) to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the furnace body, and the furnace is characterized in that the feeding device, the discharging device and the furnace body are sealed by adopting a sealing device (3), and a closed cooling circulation system is arranged in the furnace body (5); and the elbows on the water inlet pipe bundle and the water return pipe bundle in the cooling circulating system are provided with half pipe structures.

2. Rotary furnace with indirect cooling of the tube bundles according to claim 1, characterized in that the feeding device comprises a feeding conveyor (1), a feeding box (2) and a sealing device (3); the end part of the feeding box (2) is provided with a feeding conveyor (1) which extends into the front end inside the furnace body (5).

3. Rotary furnace with indirect cooling of the tube bundles according to claim 1, characterized in that the discharge device comprises a discharge box (8), a discharge opening (11) and a sealing device (3); and a discharging opening (21) is arranged on the furnace body (5) at the covering part of the discharging box (8).

4. A rotary kiln for indirect cooling of tube bundles according to any of claims 1-3, characterized in that the sealing means (3) comprise labyrinth seals and/or flexible seals; the labyrinth seal consists of a static seal ring (42) and a dynamic seal ring (43); the flexible seal comprises a seal backing plate (28) and a wear-resistant block (29) which are arranged on the furnace body (5), a spring piece (31) and a flexible pad (30) are pressed on the wear-resistant block (29) through a pressing plate I (32), and the other ends of the spring piece (31) and the flexible pad (30) are pressed through a pressing plate II (35) and are connected with the discharging box (8).

5. The rotary furnace for indirectly cooling the tube bundle according to claim 4, wherein a hook (33) is arranged outside the spring plate (31), a steel wire rope (34) is wound on the end part of the hook (33), and balancing weights (15) are added at the two ends of the steel wire rope (34).

6. The rotary furnace for indirectly cooling the tube bundles according to claim 1, wherein a closed cooling circulation system arranged in the furnace body (5) comprises a central tube (24) connected with a flange at the tail part of the furnace body (5), the central tube (24) is connected with a water inlet tube bundle (19) through a water inlet ring tube (22), and is connected with a water return tube bundle (18) through a water return ring tube (23), and the water inlet tube bundle and the water return tube bundle (18, 19) are connected through elbows I and II (26, 27) to form a loop; the wall thickness of the elbows I and II (26 and 27) is not less than 3 mm.

7. Rotary furnace with indirect tube bundle cooling according to claim 6, characterized in that the inlet and return tube bundles (18, 19) are movably supported on tube racks (20).

8. A rotary furnace with tube bundle indirect cooling according to claim 2, characterized in that the feeding conveyor (1) comprises a driving device (36) and a screw (38) connected through a coupling (37), the screw (38) is provided with a helical blade (40), and the material is fed into the front end inside the furnace body (5) through the helical blade (40).

9. A rotary kiln with indirect tube bundle cooling according to claim 8, characterized in that the feed conveyor (1) can be replaced by a feed chute, which is connected to the feed box (2), the outlet end of which extends into the kiln body (5), through which the material is fed into the front interior of the kiln body (5).