CN215675285U

CN215675285U - Air preheater

Info

Publication number: CN215675285U
Application number: CN202121985638.7U
Authority: CN
Inventors: 陈振新; 李秦越; 单广钦
Original assignee: Taishan Group Taian Huadian Thermal Engineering Co ltd
Current assignee: Taishan Group Taian Huadian Thermal Engineering Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-01-28
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses an air preheater, and belongs to the technical field of heat energy recovery. An air preheater comprising a flue gas duct, further comprising: the cavity is arranged in the inner wall of the flue gas pipe, wherein the outer wall of the flue gas pipe is provided with an air inlet pipe and an air outlet pipe which are communicated with the cavity; the outer wall of the flue gas pipe is provided with a driving part connected with the first circular ring; the device plates are arranged on the circumference and are fixedly connected to the inner wall of the first circular ring, sliding grooves are formed in the side walls of the device plates, and scrapers which abut against the inner wall of the flue gas pipe are connected in the sliding grooves in a sliding mode; the second circular ring is fixedly connected with the flue gas pipe through a support, and the plurality of scraping plates are connected with the second circular ring through a shaking mechanism; the air preheater disclosed by the utility model can be used for cleaning the smoke dust on the inner wall without manpower, is more convenient to use and improves the working efficiency of the air preheater.

Description

Air preheater

Technical Field

The utility model relates to the technical field of heat energy recovery, in particular to an air preheater.

Background

The air preheater is a heating surface for preheating air before entering the boiler to a certain temperature by smoke in a flue at the tail part of the boiler through internal radiating fins, and is equipment for improving the heat exchange performance of the boiler and reducing energy consumption.

But current air heater is when using, and the dust in the flue gas is attached to air heater's inner wall easily to influence the heat transfer in the flue gas, then need artifical regular cleaning to air heater's inner wall, but the dust inefficiency of artifical clearance air heater inner wall, and when the clearance, in order to guarantee safety, need air heater stop to use, this normal use that can influence air heater greatly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the inner wall of an air preheater in the prior art is easily affected by smoke and dust, and provides the air preheater.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an air preheater comprising a flue gas duct, further comprising: the cavity is arranged in the inner wall of the flue gas pipe, wherein the outer wall of the flue gas pipe is provided with an air inlet pipe and an air outlet pipe which are communicated with the cavity; the first circular ring is rotatably connected to the gas outlet end of the flue gas pipe, wherein the outer wall of the flue gas pipe is provided with a driving part connected with the first circular ring; the device plates are arranged on the circumference and are fixedly connected to the inner wall of the first circular ring, sliding grooves are formed in the side walls of the device plates, and scrapers which abut against the inner wall of the flue gas pipe are connected in the sliding grooves in a sliding mode; the second ring is fixedly connected with the flue gas pipe through a support and is coaxial with the first ring, and the scraping plates are connected with the second ring through a shaking mechanism.

In order to drive the first circular ring to rotate, preferably, the driving part comprises a driving motor fixedly installed on the outer wall of the flue gas pipe, a driving gear is fixedly installed at the output end of the driving motor, and the outer wall of the circumference of the first circular ring is fixedly connected with a ring gear meshed with the driving gear.

In order to improve the deashing efficiency of scraper blade, it is further, shake mechanism includes the lug of fixed connection in scraper blade one end, pass through reset spring elastic connection between lug and the first ring, the lateral wall of lug offsets with the lateral wall of second ring, the fixed convex surface that is equipped with a plurality of circumference distributions of axial lateral wall of second ring.

In order to further improve the ash removal efficiency of the scraper, furthermore, the outer wall of the scraper is provided with a plurality of uniformly distributed bar-shaped blocks, and the bar-shaped blocks are perpendicular to the axis of the flue gas pipe.

In order to improve the heat conduction performance of the cavity, preferably, a plurality of heat conduction rods which are uniformly distributed are fixedly installed on the inner wall of the cavity.

In order to reduce the friction force between the convex surface and the convex surface, further, the tail end of the convex block is fixedly provided with a roller which is abutted against the side wall of the second circular ring.

Compared with the prior art, the utility model provides an air preheater, which has the following beneficial effects:

1. according to the air preheater, the driving motor and the driving gear drive the ring gear to rotate, the ring gear can drive the first ring to rotate, and the first ring can drive the scraper to scrape on the inner wall of the flue gas pipe, so that dust on the inner wall of the flue gas pipe is scraped off, the efficiency of heating a cavity of the flue gas pipe is ensured, the flue gas pipe does not need to be cleaned manually, and the air preheater is more convenient to use;

2. this air heater drives lug and convex surface cooperation through the pivoted scraper blade to make the scraper blade carry out the reciprocal scraping of axial when flue gas pipe internal rotation is scraped, can make the deashing efficiency of scraper blade promote greatly.

Drawings

FIG. 1 is a schematic diagram of an axial structure of an air preheater according to the present invention;

FIG. 2 is a schematic view of a front cut-away structure of an air preheater according to the present invention;

FIG. 3 is a schematic diagram of a right side view of an air preheater according to the present invention;

fig. 4 is a schematic structural diagram of an air preheater according to the present invention at a position a in fig. 2.

In the figure: 1. a flue gas pipe; 2. a cavity; 3. an air inlet pipe; 4. an air outlet pipe; 5. a heat conducting rod; 6. a first circular ring; 7. a squeegee; 8. a mounting plate; 9. a chute; 10. a bar-shaped block; 11. a second circular ring; 12. a support; 13. a convex surface; 14. a bump; 15. a return spring; 16. a roller; 17. a ring gear; 18. a drive motor; 19. a drive gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example (b):

referring to fig. 1-4, an air preheater includes a flue gas duct 1, and further includes: the cavity 2 is arranged in the inner wall of the flue gas pipe 1, wherein the outer wall of the flue gas pipe 1 is provided with an air inlet pipe 3 and an air outlet pipe 4 which are communicated with the cavity 2; the first circular ring 6 is rotatably connected to the air outlet end of the flue gas pipe 1, wherein the outer wall of the flue gas pipe 1 is provided with a driving part connected with the first circular ring 6; a plurality of device plates 8 are arranged on the circumference and are fixedly connected to the inner wall of the first circular ring 6, wherein sliding grooves 9 are formed in the side walls of the device plates 8, and scrapers 7 which abut against the inner wall of the flue gas pipe 1 are connected in the sliding grooves 9 in a sliding manner; second ring 11, through support 12 and flue gas pipe 1 fixed connection, and with first ring 6 with the axle center, wherein, a plurality of scraper blades 7 all are connected with second ring 11 through shake mechanism, when using, flue gas can pass flue gas pipe 1, and the air can enter into in the cavity 2 from intake pipe 3, discharge from outlet duct 4 at last, and the air is in the period that gets into cavity 2, the flue gas in flue gas pipe 1 can heat the air in cavity 2, in flue gas pipe 1's use, actuating mechanism can drive first ring 6 and rotate, first ring 6 then can drive scraper blade 7 and scrape at flue gas pipe 1's inner wall, thereby scrape the dust of flue gas pipe 1 inner wall, the efficiency of flue gas pipe 1 heating cavity 2 has been guaranteed, and need not manual cleaning flue gas pipe 1, it is more convenient to use.

The driving part comprises a driving motor 18 fixedly installed on the outer wall of the flue gas pipe 1, a driving gear 19 is fixedly installed at the output end of the driving motor 18, a ring gear 17 meshed with the driving gear 19 is fixedly connected to the outer wall of the circumference of the first circular ring 6, the driving motor 18 drives the ring gear 17 to rotate through the driving gear 19, and the ring gear 17 can drive the first circular ring 6 to rotate.

The shake mechanism includes lug 14 of fixed connection in scraper blade 7 one end, through reset spring 15 elastic connection between lug 14 and the first ring 6, the lateral wall of lug 14 offsets with the lateral wall of second ring 11, the fixed convex surface 13 that is equipped with a plurality of circumference and distributes of axial lateral wall of second ring 11, when scraper blade 7 scrapes in flue gas pipe 1, lug 14 of scraper blade 7 one end can intermittently touch the convex surface 13 of second ring 11 lateral wall, thereby make scraper blade 7 slide to the axial direction of flue gas pipe 1, when lug 14 and convex surface 13 separate, lug 14 again drives scraper blade 7 and resets under reset spring 15's effect, thereby make scraper blade 7 carry out the reciprocal scraping of axial in the time of the rotation scraping of flue gas pipe 1, can make the deashing efficiency of scraper blade 7 promote greatly.

The outer wall of scraper blade 7 is equipped with a plurality of evenly distributed's bar piece 10, and bar piece 10 sets up with the axis of flue gas pipe 1 is perpendicular, and when scraper blade 7 endwise slip, bar piece 10 can promote scraper blade 7's deashing efficiency.

The inner wall fixed mounting of cavity 2 has a plurality of evenly distributed's heat conduction pole 5, can promote the heat conduction efficiency of cavity 2 greatly.

The friction between the projection 14 and the convex surface 13 can be reduced by fixedly mounting the roller 16 at the end of the projection 14 against the side wall of the second ring 11.

The working principle is as follows: in the utility model, when in use, smoke can pass through the smoke pipe 1, air can enter the cavity 2 from the air inlet pipe 3 and is finally discharged from the air outlet pipe 4, and the air is heated by the smoke in the smoke pipe 1 during entering the cavity 2, when the smoke pipe 1 is in use, the driving motor 18 is turned on, the driving motor 18 drives the ring gear 17 to rotate through the driving gear 19, the ring gear 17 drives the first ring 6 to rotate, the first ring 6 drives the scraper 7 to scrape on the inner wall of the smoke pipe 1, so that dust on the inner wall of the smoke pipe 1 is scraped off, the efficiency of the smoke pipe 1 for heating the cavity 2 is ensured, the smoke pipe 1 does not need to be cleaned manually, the use is more convenient, when the scraper 7 scrapes in the smoke pipe 1, the lug 14 at one end of the scraper 7 intermittently touches the convex surface 13 on the side wall of the second ring 11, so that the scraper 7 slides towards the axial direction of the smoke pipe 1, when the convex block 14 is separated from the convex surface 13, the convex block 14 drives the scraper 7 to reset under the action of the reset spring 15, so that the scraper 7 performs axial reciprocating scraping while rotating and scraping in the flue gas pipe 1, and the ash removal efficiency of the scraper 7 can be greatly improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. An air preheater comprises a flue gas pipe (1), and is characterized by further comprising:

a cavity (2) arranged in the inner wall of the flue gas pipe (1),

wherein, the outer wall of the flue gas pipe (1) is provided with an air inlet pipe (3) and an air outlet pipe (4) which are communicated with the cavity (2);

a first circular ring (6) which is rotationally connected with the air outlet end of the flue gas pipe (1),

the outer wall of the flue gas pipe (1) is provided with a driving part connected with a first circular ring (6);

a plurality of device plates (8) are arranged on the circumference and are all fixedly connected with the inner wall of the first circular ring (6),

the side walls of the device plates (8) are provided with sliding chutes (9), and the sliding chutes (9) are connected with scrapers (7) which are abutted against the inner wall of the flue gas pipe (1) in a sliding manner;

the second circular ring (11) is fixedly connected with the flue gas pipe (1) through a bracket (12) and is coaxial with the first circular ring (6),

wherein the scrapers (7) are connected with the second ring (11) through a shaking mechanism.

2. An air preheater according to claim 1, wherein the driving member comprises a driving motor (18) fixedly mounted on the outer wall of the flue gas duct (1), the output end of the driving motor (18) is fixedly mounted with a driving gear (19), and the circumferential outer wall of the first ring (6) is fixedly connected with a ring gear (17) engaged with the driving gear (19).

3. An air preheater according to claim 2, wherein the shaking mechanism comprises a projection (14) fixedly connected to one end of the scraper (7), the projection (14) is elastically connected to the first ring (6) through a return spring (15), a side wall of the projection (14) abuts against a side wall of the second ring (11), and a plurality of circumferentially distributed convex surfaces (13) are fixedly arranged on an axial side wall of the second ring (11).

4. An air preheater according to claim 3, characterized in that the outer wall of the scraper (7) is provided with a plurality of evenly distributed bar-shaped blocks (10), the bar-shaped blocks (10) being arranged perpendicular to the axis of the flue gas duct (1).

5. An air preheater according to claim 1, characterized in that a plurality of evenly distributed heat conducting bars (5) are fixedly mounted to the inner wall of the cavity (2).

6. An air preheater according to claim 3, wherein the ends of the projections (14) are fixedly mounted with rollers (16) which abut against the side wall of the second ring (11).