An air preheater for a heating boiler

Abstract

The utility model discloses a kind of air preheaters for heating boiler, it is related to heating boiler technical field, it includes pedestal and air preheater shell, preheating pipe assembly is installed in the air preheater shell, the upper portion of air preheater shell is equipped with flue gas inlet and flue gas outlet in proper order, and the lower portion of air preheater shell is equipped with air inlet and air outlet in proper order, further include height adjustable support mechanism and cleanable filter mechanism.The utility model is provided with cleanable filter mechanism, by installing filter core at flue gas inlet, particle matter impurities in flue gas can be filtered out fully, and then particle matter impurities in flue gas can be avoided to enter the situation that easily influences internal preheating pipe assembly work performance, and particle matter impurities in flue gas is filtered out and can be controlled by servo motor to reciprocate along the surface of filter core to brush off the particle matter impurities adhered to filter core surface, so that the situation that filter core appears to be blocked can be prevented, and it is beneficial to guarantee the filtering efficiency of flue gas.

Description

Technical Field

[0001] This utility model relates to the field of heating boiler technology, and in particular to an air preheater for heating boilers. Background Technology

[0002] The air preheater of a heating boiler is a heat exchange device in the flue at the tail end of the boiler that uses the waste heat of the flue gas to heat the air required for combustion. Its main purpose is to improve boiler efficiency (reduce heat loss from flue gas), enhance combustion, and stabilize ignition and combustion processes.

[0003] A search revealed that patent application number 202020497047.4 discloses a plug-in type air preheater that is easy to install and disassemble. It includes an air preheater body and two sets of flue gas inlets and outlets, with two sets of limiting mechanisms between the flue gas inlets and outlets and the air preheater body. While the aforementioned prior art uses these limiting mechanisms to facilitate the installation and disassembly of the flue gas inlets and outlets, the flue gas inlet lacks a filtration function, failing to adequately filter particulate impurities in the flue gas. These particulate impurities can easily affect the performance of the internal preheating tube assembly. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an air preheater for heating boilers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An air preheater for a heating boiler includes a base and an air preheater shell. A preheating tube assembly is installed inside the air preheater shell. A flue gas inlet and a flue gas outlet are sequentially provided on the upper part of the air preheater shell, and an air inlet and an air outlet are sequentially provided on the lower part of the air preheater shell. It also includes a height-adjustable support mechanism and a cleanable filter mechanism.

[0007] The cleanable filtration mechanism includes a filter element fixedly connected to the flue gas inlet, a servo motor, a transverse lead screw rotatably installed in the flue gas inlet, a movable plate threadedly connected to the transverse lead screw, and a brush rod fixedly connected to the outer wall of the back of the movable plate.

[0008] Preferably, a guide shaft is fixed inside the flue gas inlet, and a guide sleeve is fixedly embedded inside the moving plate. The guide sleeve is slidably connected to the guide shaft, and the bristles on the back of the brush rod are in contact with the surface of the filter element.

[0009] Preferably, a motor mount is welded to the rear outer wall of the flue gas inlet, the servo motor is fixedly connected to the top outer wall of the motor mount by bolts, and the output shaft of the servo motor is coaxially fixedly connected to one end of the transverse lead screw by a coupling.

[0010] Preferably, the height-adjustable support mechanism includes four height adjustment components arranged sequentially at the four corners of the top of the base, and two connecting angle steels are symmetrically welded to the lower outer walls on both sides of the air preheater housing.

[0011] Preferably, the height adjustment assembly includes a fixed square tube welded to the top outer wall of the base, an adjustment rod slidably connected inside the fixed square tube, a guide slide opened at the front of the fixed square tube, and a threaded guide post welded to the lower outer wall of the front of the adjustment rod, and the four adjustment rods are respectively fixedly connected to four connecting angle steels by bolts.

[0012] Preferably, a positioning bead is installed on the threaded guide post. The positioning bead is a press-fit ball plunger. The inner wall of one side of the guide slide has positioning holes that are evenly distributed and are adapted to the positioning bead.

[0013] Preferably, the threaded guide post is threaded with a locking nut, and the locking nut forms a tight fit with the front outer wall of the fixed square tube.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Equipped with a cleanable filtration mechanism, the filter element installed at the flue gas inlet can effectively filter out particulate impurities in the flue gas, thereby preventing particulate impurities from entering and affecting the working performance of the internal preheating tube assembly. Furthermore, the servo motor controls the brush rod to reciprocate along the surface of the filter element to brush away the particulate impurities attached to the surface of the filter element, thus preventing the filter element from becoming clogged and ensuring the filtration efficiency of the flue gas.

[0016] 2. It is equipped with a height-adjustable support mechanism, which allows for flexible adjustment of the installation height of the air preheater during the installation and commissioning phase, so as to better adapt to different usage conditions. Attached Figure Description

[0017] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional enlarged structural diagram of the flue gas inlet area in this utility model;

[0019] Figure 3 This is a three-dimensional enlarged structural diagram of a portion of the cleanable filtration mechanism in this utility model;

[0020] Figure 4 This is a three-dimensional enlarged structural diagram of the height adjustment component in this utility model;

[0021] Figure 5This is a three-dimensional enlarged structural diagram of the connection between the threaded guide post and the locking nut in this utility model;

[0022] Figure 6 This is a rear-view three-dimensional structural diagram of the present invention.

[0023] In the diagram: 1. Base; 2. Air preheater housing; 3. Flue gas inlet; 4. Flue gas outlet; 5. Filter element; 6. Servo motor; 7. Horizontal lead screw; 8. Moving plate; 9. Brush rod; 10. Guide shaft; 11. Guide sleeve; 12. Motor base; 13. Fixed square tube; 14. Adjusting rod; 15. Guide slide; 16. Threaded guide post; 17. Locking nut; 18. Positioning bead; 19. Positioning hole; 20. Connecting angle steel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1, referring to Figure 1-3 and Figure 6 An air preheater for a heating boiler includes a base 1, an air preheater shell 2, and a cleanable filter mechanism. A preheating tube assembly is installed inside the air preheater shell 2. A flue gas inlet 3 and a flue gas outlet 4 are sequentially provided on the upper part of the air preheater shell 2, and an air inlet and an air outlet are sequentially provided on the lower part of the air preheater shell 2.

[0026] Specifically, the cleanable filtration mechanism includes a filter element 5 fixedly connected to the flue gas inlet 3, a servo motor 6, a transverse lead screw 7 rotatably installed in the flue gas inlet 3, a movable plate 8 threadedly connected to the transverse lead screw 7, and a brush rod 9 fixedly connected to the outer wall of the back of the movable plate 8.

[0027] Furthermore, a guide shaft 10 is fixed inside the flue gas inlet 3, and a guide sleeve 11 is fixedly embedded inside the moving plate 8. The guide sleeve 11 is slidably connected to the guide shaft 10. Through the guiding cooperation of the guide sleeve 11 and the guide shaft 10, the stability of the linear movement of the moving plate 8 can be ensured.

[0028] Furthermore, the bristles on the back of the brush rod 9 come into contact with the surface of the filter element 5, making it easier to brush away particulate impurities attached to the surface of the filter element 5 through the reciprocating motion of the brush rod 9.

[0029] Furthermore, a motor base 12 is welded to the rear outer wall of the flue gas inlet 3, and the servo motor 6 is fixedly connected to the top outer wall of the motor base 12 by bolts. The output shaft of the servo motor 6 is coaxially fixedly connected to one end of the transverse lead screw 7 by a coupling.

[0030] The working principle of this embodiment is as follows: High-temperature flue gas enters from the flue gas inlet 3 and is filtered by the filter element 5 to remove particulate impurities in the flue gas. After a period of filtration, the servo motor 6 controls the horizontal lead screw 7 to rotate. Then, under the guidance of the guide shaft 10, the moving plate 8, which is threadedly connected to the horizontal lead screw 7, drives the brush rod 9 to reciprocate along the surface of the filter element 5 to brush away the particulate impurities attached to the surface of the filter element 5. This can prevent the filter element 5 from becoming clogged and help ensure the filtration efficiency of the flue gas.

[0031] Example 2, refer to Figure 4-6 This embodiment is an optimization based on embodiment 1. Specifically, the height-adjustable support mechanism includes four height adjustment components arranged sequentially at the four corners of the top of the base 1, and two connecting angle steels 20 are symmetrically welded to the lower outer walls of both sides of the air preheater shell 2.

[0032] Furthermore, the height adjustment assembly includes a fixed square tube 13 welded to the top outer wall of the base 1, an adjustment rod 14 slidably connected inside the fixed square tube 13, a guide slide 15 opened in front of the fixed square tube 13, and a threaded guide post 16 welded to the lower outer wall in front of the adjustment rod 14. The four adjustment rods 14 are respectively fixedly connected to four connecting angle steels 20 by bolts.

[0033] Furthermore, a positioning bead 18 is installed on the threaded guide post 16. The positioning bead 18 is a press-fit ball plunger. A positioning hole 19 is provided on one side inner wall of the guide slide 15. The positioning hole 19 is adapted to the positioning bead 18. Through the cooperation of the positioning bead 18 and the positioning hole 19, the adjustment personnel can better understand the adjustment height of the adjustment rod 14, thereby ensuring the consistency of the height adjustment of the four height adjustment components.

[0034] Furthermore, a locking nut 17 is threadedly connected to the threaded guide post 16. The locking nut 17 forms a tight fit with the front outer wall of the fixed square tube 13. Through the locking effect of the locking nut 17, the position of the adjusting rod 14 after adjustment can be locked.

[0035] The working principle of this embodiment is as follows: Without the air preheater installed, the four height adjustment components are manually adjusted by moving the adjustment rods 14 up and down. After adjustment, the positioning bead 18 will be inserted into the corresponding positioning hole 19, and the threaded guide post 16 will slide in the guide slide 15. After adjustment, the position of the adjustment rods 14 can be locked by locking the locking nut 17. Then, after the height of the four adjustment rods 14 is consistent, the four connecting angle steels 20 on the outside of the air preheater housing 2 are connected to the top of the corresponding four adjustment rods 14 by bolts to complete the fixed installation. In this way, the installation height of the air preheater can be flexibly adjusted during the installation and commissioning stage to better adapt to different usage conditions.

[0036] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air preheater for a heating boiler, comprising a base (1) and an air preheater shell (2), wherein a preheating tube assembly is installed inside the air preheater shell (2), a flue gas inlet (3) and a flue gas outlet (4) are sequentially provided on the upper part of the air preheater shell (2), and an air inlet and an air outlet are sequentially provided on the lower part of the air preheater shell (2), characterized in that, It also includes a height-adjustable support structure and a cleanable filtration system; The cleanable filtration mechanism includes a filter element (5) fixedly connected to the flue gas inlet (3), a servo motor (6), a transverse lead screw (7) rotatably installed in the flue gas inlet (3), a movable plate (8) threadedly connected to the transverse lead screw (7), and a brush rod (9) fixedly connected to the outer wall of the back of the movable plate (8).

2. An air preheater for a heating boiler according to claim 1, characterized in that, The flue gas inlet (3) is fixed with a guide shaft (10), and the movable plate (8) is fixed with a guide sleeve (11). The guide sleeve (11) is slidably connected to the guide shaft (10), and the brush bristles on the back of the brush rod (9) are in contact with the surface of the filter element (5).

3. An air preheater for a heating boiler according to claim 1, characterized in that, A motor mount (12) is welded to the rear outer wall of the flue gas inlet (3). The servo motor (6) is fixedly connected to the top outer wall of the motor mount (12) by bolts, and the output shaft of the servo motor (6) is fixedly connected to one end of the transverse lead screw (7) through a coupling.

4. An air preheater for a heating boiler according to claim 1, characterized in that, The height-adjustable support mechanism includes four height adjustment components arranged sequentially at the four corners of the top of the base (1), and two connecting angle steels (20) are symmetrically welded to the lower outer walls of both sides of the air preheater shell (2).

5. An air preheater for a heating boiler according to claim 4, characterized in that, The height adjustment assembly includes a fixed square tube (13) welded to the top outer wall of the base (1), an adjustment rod (14) slidably connected inside the fixed square tube (13), a guide slide (15) opened in front of the fixed square tube (13), and a threaded guide post (16) welded to the lower outer wall in front of the adjustment rod (14). The four adjustment rods (14) are respectively fixedly connected to four connecting angle steels (20) by bolts.

6. An air preheater for a heating boiler according to claim 5, characterized in that, The threaded guide post (16) is equipped with a positioning bead (18), which is a press-fit ball plunger. The inner wall of one side of the guide slide (15) is provided with positioning holes (19) distributed at equal intervals, and the positioning holes (19) are adapted to the positioning bead (18).

7. An air preheater for a heating boiler according to claim 5, characterized in that, The threaded guide post (16) is threaded with a locking nut (17), and the locking nut (17) forms a tight fit with the front outer wall of the fixed square tube (13).

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