CN216131945U

CN216131945U - Air preheater

Info

Publication number: CN216131945U
Application number: CN202121916036.6U
Authority: CN
Inventors: 谷博; 曲辰; 赵新飞; 王宁; 关怀; 纪东阳; 高晟桐; 戴润泽; 姜鹏; 吉鹏飞; 邓洪浩
Original assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Current assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-03-25
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to the technical field of air preheaters and discloses an air preheater which comprises an air preheater shell, wherein an air outlet pipe is fixedly connected to the upper end of the air preheater shell, an air inlet pipe is fixedly connected to the bottom end of the air preheater shell, a smoke pipe is movably mounted inside the air preheater shell, two ends of the smoke pipe are fixedly connected with rotating sleeves, a gear ring is fixedly mounted on one side of each rotating sleeve, and a gear is movably mounted at the upper end of each gear ring. This air preheater has the tobacco pipe through the inside movable mounting at the air preheater shell, and the both ends fixed mounting of tobacco pipe has the rotation cover, and wherein one side installs the ring gear, the ring gear drives the tobacco pipe under the rotation of gear and rotates in the inside of air preheater shell, and the both sides of tobacco pipe install first baffle and second baffle respectively, stay the flue gas in the tobacco pipe in the inside of tobacco pipe under the sheltering from of first baffle and second baffle, the tobacco pipe of being convenient for carries out abundant heat exchange with the cold air at air preheater shell middle part.

Description

Air preheater

Technical Field

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

Background

The air preheater is also called air preheater for short, and is a preheating device for improving heat exchange performance of boiler and reducing heat loss.

The air preheater generally adopts an enamel pipe, so that low-temperature corrosion of ammonium bisulfate and the like is avoided, and the anti-corrosion effect is good; however, wet ash formed by ammonia bisulfate and ammonia escape can be condensed on the surface of the pipe in the area, the pipe box can be blocked when the air preheater is operated for a long time, the heat transfer of the heating surface of the air preheater is influenced, the pipe of the air preheater is abraded by bias flow of smoke, the smoke resistance of the tail area is increased, the power consumption of an induced draft fan is increased, the output of the boiler is influenced by overhigh smoke exhaust temperature and insufficient output of the induced draft fan when the boiler is seriously operated, and the air preheater needs to be manually cleaned after the boiler is stopped for about 3 months.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the air preheater which has the advantages of good heat exchange effect and convenience in automatically cleaning the flue, and solves the problems in the background technology.

The utility model provides the following technical scheme: the utility model provides an air preheater, includes the air preheater shell, the upper end fixedly connected with air outlet pipe of air preheater shell, the bottom fixedly connected with air of air preheater shell advances the pipe, the inside movable mounting of air preheater shell has the tobacco pipe, the both ends fixedly connected with of tobacco pipe rotates the cover, one side fixed mounting who rotates the cover has the ring gear, the upper end movable mounting of ring gear has the gear, one side fixed mounting of gear has the motor, motor fixed mounting is in one side of air preheater shell, the equal fixed mounting in both sides of air preheater shell has the flange, one side of air preheater shell advances the tobacco pipe through flange fixedly connected with, the opposite side of air preheater shell passes through flange fixedly connected with and goes out the tobacco pipe.

Carefully selecting, first baffle and second baffle are installed respectively to the both sides of air preheater shell, and first baffle and second baffle are the sector plate, and the coincidence area of first baffle and second baffle on the horizontal direction is zero.

Carefully, the inside fixed mounting of tobacco pipe has the rotating turret, the middle part movable mounting of rotating turret has the cleaning brush, the equal fixed mounting in both ends of cleaning brush has the flabellum.

The smoke pipes are selected, are distributed in a circular and dense mode and penetrate through the middle of the shell of the air preheater, and are enamel inner walls.

Carefully selecting, the circumference of flange is equipped with the bolt, and the flange all fixes through bolt and nut with advancing tobacco pipe and going out the tobacco pipe.

And carefully selecting, wherein the length value of the cleaning brush is consistent with that of the smoke tube, and the surface bristles of the cleaning brush are stainless steel bristles and are in direct contact with the inner wall of the smoke tube.

Compared with the prior art, the utility model has the following beneficial effects:

1. this air preheater has the tobacco pipe through the inside movable mounting at the air preheater shell, and the both ends fixed mounting of tobacco pipe has the rotation cover, and wherein one side installs the ring gear, the ring gear drives the tobacco pipe under the rotation of gear and rotates in the inside of air preheater shell, and the both sides of tobacco pipe install first baffle and second baffle respectively, stay the flue gas in the tobacco pipe in the inside of tobacco pipe under the sheltering from of first baffle and second baffle, the tobacco pipe of being convenient for carries out abundant heat exchange with the cold air at air preheater shell middle part.

2. This air preheater is equipped with rotating turret and clearance brush through the inside at the tobacco pipe, and the equal fixed mounting in both ends of clearance brush has the flabellum, and the flabellum rotates along with the inside flue gas of circulating of tobacco pipe, is convenient for rotate the clearance to the inner chamber of tobacco pipe, avoids the dust in the flue gas to save in the inside of tobacco pipe, guarantees the inside cleanness of tobacco pipe, avoids influencing the heat transfer of device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is an exploded view of the housing of the air preheater of the present invention;

FIG. 4 is a sectional view of a smoke tube of the present invention;

FIG. 5 is a schematic view of structure A of the present invention;

FIG. 6 is a schematic view of structure B of the present invention.

In the figure: 1. an air preheater housing; 2. an air outlet pipe; 3. an air inlet pipe; 4. a smoke pipe; 5. rotating the sleeve; 6. A toothed ring; 7. a gear; 8. a motor; 9. a first baffle plate; 10. a second baffle; 11. a smoke inlet pipe; 12. a flange; 13. discharging the smoke tube; 14. a rotating frame; 15. a fan blade; 16. a cleaning brush.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an air preheater comprises an air preheater housing 1, wherein a first baffle 9 and a second baffle 10 are respectively installed at two sides of the air preheater housing 1, the first baffle 9 and the second baffle 10 are both fan-shaped plates, the overlapping area of the first baffle 9 and the second baffle 10 in the horizontal direction is zero, the first baffle 9 and the second baffle 10 shield two ends of a smoke tube 4 in the rotating process, so as to improve the residence time of smoke gas inside the smoke tube 4 and fully utilize the residual heat of the smoke gas inside the smoke tube 4, an air outlet tube 2 is fixedly connected to the upper end of the air preheater housing 1, an air inlet tube 3 is fixedly connected to the bottom end of the air preheater housing 1, the smoke tube 4 is movably installed inside the air preheater housing 1, a rotating frame 14 is fixedly installed inside the smoke tube 4, a cleaning brush 16 is movably installed at the middle part of the rotating frame 14, fan blades 15 are fixedly installed at two ends of the cleaning brush 16, the rotation of the cleaning brush 16 is convenient to drive the dust on the inner part of the smoke tube 4 to clean, the dust accumulation on the inner wall of the smoke tube 4 is avoided, the heat exchange effect of the smoke tube 4 is ensured, the smoke tube 4 is circularly and densely distributed and penetrates through the middle part of the air preheater shell 1, the smoke tube 4 is an enamel inner wall, the material of the smoke tube 4 avoids the corrosion and the damage of the smoke gas, the service life of the device is prolonged, the stable use of the device is convenient, the length value of the cleaning brush 16 is consistent with that of the smoke tube 4, the surface brush hair of the cleaning brush 16 is stainless steel brush hair and is in direct contact with the inner wall of the smoke tube 4, the cleaning brush 16 is only in contact with the inner wall of the smoke tube 4 and can not scratch the inner wall of the smoke tube 4, the dust on the inner wall of the smoke tube 4 is cleaned under the condition of ensuring the complete coating inside of the smoke tube 4, the stable use and the automatic cleaning of the device are ensured, the two ends of the smoke tube 4 are fixedly connected with the rotating sleeves 5, one side fixed mounting who rotates cover 5 has ring gear 6, ring gear 6's upper end movable mounting has gear 7, one side fixed mounting of gear 7 has motor 8, motor 8 fixed mounting is in one side of air preheater shell 1, the equal fixed mounting in both sides of air preheater shell 1 has flange 12, the circumference of flange 12 is equipped with the bolt, and flange 12 all fixes through bolt and nut with advancing tobacco pipe 11 and play tobacco pipe 13, the installation of flange 12 is convenient for stabilize the installation to the device, improve the convenient installation of device, flange 12 fixedly connected with advances tobacco pipe 11 through flange 12 in one side of air preheater shell 1, flange 12 fixedly connected with goes out tobacco pipe 13 is passed through to the opposite side of air preheater shell 1.

The working principle is as follows: when the device is used, the smoke inlet end and the smoke outlet end of the device are respectively connected with the smoke inlet pipe 11 and the smoke outlet pipe 13 through the flange 12, then the air outlet pipe 2 and the air inlet pipe 3 are respectively connected to the air preheating end of the boiler and an air inlet device of external cold air, the starting device is used, the motor 8 drives the gear 7 to rotate, so that the gear ring 6 and the smoke pipe 4 are driven to rotate inside the air preheater shell 1, at the moment, the boiler smoke is connected into the smoke pipe 4 through the smoke inlet pipe 11 and circulates inside the smoke pipe 4, stays temporarily along with the rotation of the smoke pipe 4 and is then discharged through the smoke outlet pipe 13, in the process, the external air inlet device leads the cold air into the inside of the air preheater shell 1 and exchanges heat with the outer wall of the smoke pipe 4, and then is discharged into the boiler through the air inlet pipe 2 to be preheated for use, and the device can be used.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the utility model, the filling pattern is only used for distinguishing the layers and is not limited at all.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An air preheater comprises an air preheater shell (1), and is characterized in that: an air outlet pipe (2) is fixedly connected at the upper end of the air preheater shell (1), an air inlet pipe (3) is fixedly connected at the bottom end of the air preheater shell (1), a smoke tube (4) is movably arranged in the air preheater shell (1), two ends of the smoke tube (4) are fixedly connected with a rotating sleeve (5), a gear ring (6) is fixedly arranged on one side of the rotating sleeve (5), a gear (7) is movably arranged at the upper end of the gear ring (6), a motor (8) is fixedly arranged on one side of the gear (7), the motor (8) is fixedly arranged on one side of the air preheater shell (1), flanges (12) are fixedly arranged on both sides of the air preheater shell (1), one side of the air preheater shell (1) is fixedly connected with a smoke inlet pipe (11) through a flange (12), the other side of the air preheater shell (1) is fixedly connected with a smoke outlet pipe (13) through a flange (12).

2. An air preheater according to claim 1, wherein: the air preheater is characterized in that a first baffle (9) and a second baffle (10) are respectively installed on two sides of the air preheater shell (1), the first baffle (9) and the second baffle (10) are sector plates, and the overlapping area of the first baffle (9) and the second baffle (10) in the horizontal direction is zero.

3. An air preheater according to claim 1, wherein: the inside fixed mounting of tobacco pipe (4) has rotating turret (14), the middle part movable mounting of rotating turret (14) has cleaning brush (16), equal fixed mounting has flabellum (15) in the both ends of cleaning brush (16).

4. An air preheater according to claim 3, wherein: the smoke pipes (4) are circularly and densely distributed and penetrate through the middle part of the air preheater shell (1), and the smoke pipes (4) are enamel inner walls.

5. An air preheater according to claim 1, wherein: bolts are arranged on the circumference of the flange (12), and the flange (12), the smoke inlet pipe (11) and the smoke outlet pipe (13) are fixed through bolts and nuts.

6. An air preheater according to claim 3, wherein: the length value of the cleaning brush (16) is consistent with that of the smoke tube (4), and the surface bristles of the cleaning brush (16) are stainless steel bristles and are in direct contact with the inner wall of the smoke tube (4).