Boiler air pre-heater ash removal device

Abstract

The utility model discloses a boiler air pre-heater ash removal device which comprises an ash removal frame arranged in an air pre-heater and a driving device for driving the ash removal frame to move in the air pre-heater, and two V-shaped cleaning plates are rotationally connected to the ash removal frame. And a driving rod for changing the included angle between the two cleaning plates is arranged on the driving device. The gap between the heat dissipation pipes in the air pre-heater is filled to the maximum extent through the two expandable cleaning plates, ash blocks attached to the heat dissipation pipes in the air pre-heater can be cleaned to the maximum extent, and the problem that the cleaning degree of the ash blocks attached to an existing boiler air pre-heater is low is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of air preheater cleaning equipment, in particular to a boiler air preheater ash cleaning device. Background Art

[0002] The air preheater, also known as the air preheater, is a preheating device that improves the heat exchange performance of the boiler and reduces heat loss. The air preheater transfers the heat carried by the flue gas discharged from the tail flue of the boiler to the air used for combustion through the heat dissipation pipe, thereby increasing the hot air temperature required for combustion in the furnace, improving the combustion conditions in the furnace, reducing incomplete combustion losses, and further improving the thermal efficiency of the boiler. However, in actual use, the air preheater has low heat exchange efficiency due to dust accumulation forming ash blocks attached to the heat dissipation pipes, and the boiler is often forced to stop for flushing due to blockage in the tubular air preheater.

[0003] At present, the cleaning device on the ash blocks is a steel plate inserted between the heat dissipation tubes. The ash blocks are cleaned by moving the steel plate. However, there is still a large gap between the steel plate and the heat dissipation tubes in the air preheater, and the ash blocks attached to the heat dissipation tubes cannot be cleaned well. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a boiler air preheater ash cleaning device to solve the problem of low cleaning degree of ash blocks attached to the boiler air preheater.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A boiler air preheater cleaning device comprises a cleaning frame arranged in the air preheater and a driving device for driving the cleaning frame to move in the air preheater, the cleaning frame is rotatably connected to two V-shaped cleaning plates, and the driving device is provided with a driving rod for changing the angle between the two cleaning plates.

[0007] Furthermore, the two cleaning plates are vertically arranged, an adjusting rod of equal length is arranged between the two cleaning plates, a connecting piece is arranged between the side of the adjusting rod and the two cleaning plates, and the adjusting rod is fixedly connected to the end of the driving rod.

[0008] Furthermore, the connecting member is a spring.

[0009] Furthermore, the cleaning frame includes a guide rail fixedly arranged on the air preheater and a movable frame slidably connected to the guide rail, the two cleaning plates are rotatably connected to the movable frame, and the driving device is used to drive the movable frame to move on the guide rail.

[0010] Furthermore, the driving device is arranged on the outside of the air preheater, the driving rod is slidably connected to the air preheater, the driving rod is slidably connected to the movable frame, and the driving device includes a pushing member that is transmission-connected to the driving rod, and the pushing member is used to push the end of the driving rod to move on the movable frame.

[0011] Furthermore, a long slide groove is provided on the movable frame, the adjusting rod is vertically arranged in the long slide groove, and a baffle abutting against the end of the driving rod is provided on the movable frame.

[0012] Furthermore, cleaning sheets are arranged at intervals on the outer sides of the two cleaning plates in the length direction, and the two opposite cleaning sheets are both in an arc shape that bends inwards.

[0013] The significant beneficial effects achieved by the utility model are:

[0014] 1. The present application uses two expandable cleaning plates to fill the gaps between the heat dissipation tubes in the air preheater to the maximum extent, and can clean the ash blocks attached to the heat dissipation tubes in the air preheater to the maximum extent, effectively solving the problem of low cleaning degree of ash blocks attached to the current boiler air preheater.

[0015] 2. The spring-type connection piece can be used to automatically avoid the cleaning plate after it encounters the connection ribs between the heat dissipation pipes.

[0016] 3. The setting of the cleaning sheet can clean the ash blocks attached between the upper and lower heat dissipation pipes, further improving the cleaning degree of the ash blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the main structure of the utility model in use;

[0018] Attached Figure 2 This is a schematic diagram of the top view of the structure of the mobile frame in the utility model;

[0019] Attached Figure 3 This is a schematic diagram of the top view structure of the cleaning plate in the utility model;

[0020] Attached Figure 4 This is a schematic diagram of the top view structure in Example 3 of the utility model.

[0021] In the attached drawings, 1. cleaning plate; 2. driving rod; 3. adjusting rod; 4. connecting piece; 5. guide rail; 6. moving frame; 7. long slide groove; 8. baffle; 9. cleaning sheet; 10. heat dissipation pipe; 11. pushing piece. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Example 1

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, a boiler air preheater ash cleaning device comprises an ash cleaning frame installed inside the air preheater and a driving device for driving the ash cleaning frame to move in the air preheater for ash cleaning, the ash cleaning frame is rotatably connected with two cleaning plates 1 arranged in a V-shape, and the driving device is provided with a driving rod 2 for changing the angle between the two cleaning plates 1;

[0025] Among them, the two cleaning plates 1 are a pair, the two cleaning plates 1 are located between the two radiating tubes 10 in the air preheater, the two cleaning plates 1 are vertically arranged between the two radiating tubes 10, an adjusting rod 3 is installed between the two cleaning plates 1, and the opposite sides of the two cleaning plates 1 are connected with the adjusting rod 3 through a connecting member 4. In this embodiment, the connecting member 4 is a spring, and the two ends of the spring are respectively connected to the cleaning plate 1 and the adjusting rod 3. The adjusting rod 3 is equal to the cleaning plate 1. The adjusting rod 3 is fixedly connected to the end of the driving rod 2, and the driving rod 2 drives the adjusting rod 3 to move toward the angle between the two cleaning plates 1, and then the angle between the two cleaning plates 1 is changed through the connecting member 4;

[0026] The connection member 4 is a spring that can automatically give way when the cleaning plate 1 encounters the connection ribs between the heat dissipation pipes 10;

[0027] The dust cleaning frame includes a guide rail 5 fixedly mounted on the air preheater and a movable frame 6 slidably connected to the guide rail 5. Both cleaning plates 1 are rotatably connected to the movable frame 6 through high temperature resistant bearings. The driving device is used to drive the movable frame 6 to move on the guide rail 5.

[0028] The driving device is installed outside the air preheater, the driving rod 2 penetrates and is slidably connected to the air preheater, and the driving rod 2 is slidably connected to the moving frame 6. The driving device includes a pushing member 11 that is transmission-connected to the driving rod 2. In this embodiment, the pushing member 11 is a hydraulic cylinder, and the pushing member 11 is used to push the end of the driving rod 2 to move on the moving frame 6.

[0029] In this embodiment, a long slide groove 7 perpendicular to the air preheater is opened on the movable frame 6, and the adjusting rod 3 is vertically installed in the long slide groove 7. A baffle 8 abutting against the end of the driving rod 2 is installed on the side of the movable frame 6 away from the driving device. The long slide groove 7 and the baffle 8 are arranged to limit the displacement distance of the driving rod 2 and the adjusting rod 3 on the movable frame 6, and the angle change degree of the two cleaning plates 1 can be controlled at the same time.

[0030] Working principle: when the air preheater needs to be cleaned, the pushing member 11 pushes the driving rod 2 to move on the moving frame 6, and the adjusting rod 3 moves synchronously while the driving rod 2 moves. Due to the connecting member 4 between the adjusting rod 3 and the cleaning plate 1, the angle between the two cleaning plates 1 changes, and the two cleaning plates 1 are respectively close to the adjacent heat dissipation pipes 10; due to the setting of the baffle 8 and the long slide groove 7, the driving rod 2 abuts against the baffle 8 after being displaced a certain distance. At this time, the angle between the two cleaning plates 1 is fixed, and under the continuous push of the pushing member 11, the moving frame 6 starts to move along the guide rail 5 on the air preheater for cleaning, and the ash blocks attached to the heat dissipation pipes 10 are cleaned by passing the cleaning plate 1 between the heat dissipation pipes 10; when the moving frame 6 returns to its original position, the driving rod 2 drives the adjusting rod 3 away from the baffle 8 to reduce the angle between the two cleaning plates 1, which is convenient for returning to its original position.

[0031] In combination with the above, the present application uses two expandable cleaning plates 1 to maximally fill the gaps between the heat dissipation tubes 10 in the air preheater, and can clean the ash blocks attached to the heat dissipation tubes 10 in the air preheater to the greatest extent, effectively solving the current problem of low cleaning degree of ash blocks attached to the boiler air preheater.

[0032] Example 2

[0033] like Figure 1 and Figure 3 As shown, the structure of this embodiment is substantially the same as that of the embodiment 1. This embodiment is further optimized on the basis of the embodiment 1. In this embodiment, in order to further improve the degree of ash block cleaning, cleaning sheets 9 are installed at intervals on the outer sides of the two cleaning plates 1 in the length direction, and the two opposite cleaning sheets 9 are both in an arc shape that bends inwards;

[0034] By setting the cleaning sheet 9, after the angle between the two cleaning plates 1 is expanded, the cleaning sheet 9 can extend between the two adjacent radiating tubes 10, and as the cleaning plate 1 moves, the cleaning sheet 9 cleans the attached dust blocks between the two adjacent radiating tubes 10;

[0035] The two opposing cleaning sheets 9 are both in an inwardly curved arc shape and can automatically avoid touching the connecting ribs between the heat dissipation tubes 10 under the action of the spring, so as to avoid affecting the movement of the moving frame 6 .

[0036] Example 3

[0037] like Figure 4 As shown, the structure of this embodiment is substantially the same as that of embodiment 1. The difference between this embodiment and embodiment 1 is that in this embodiment, the connecting member 4 is a rod body, and the two ends of the connecting member 4 are rotatably connected to the cleaning plate 1 and the adjusting rod 3 respectively.

Claims

1. A boiler air preheater ash cleaning device, characterized in that: The invention comprises a cleaning frame arranged in an air preheater and a driving device for driving the cleaning frame to move in the air preheater, wherein two V-shaped cleaning plates (1) are rotatably connected to the cleaning frame, and the driving device is provided with a driving rod (2) for changing the angle between the two cleaning plates (1).

2. A boiler air preheater ash cleaning device according to claim 1, characterized in that: The two cleaning plates (1) are arranged vertically, an adjusting rod (3) of equal length is arranged between the two cleaning plates (1), a connecting piece (4) is arranged on the side of the adjusting rod (3) and between the two cleaning plates (1), and the adjusting rod (3) and the end of the driving rod (2) are fixedly connected.

3. A boiler air preheater ash cleaning device according to claim 2, characterized in that: The connecting member (4) is a spring.

4. A boiler air preheater ash cleaning device according to claim 2, characterized in that: The dust cleaning frame comprises a guide rail (5) fixedly arranged on the air preheater and a movable frame (6) slidably connected to the guide rail (5); the two cleaning plates (1) are rotatably connected to the movable frame (6); and the driving device is used to drive the movable frame (6) to move on the guide rail (5).

5. A boiler air preheater ash cleaning device according to claim 4, characterized in that: The driving device is arranged outside the air preheater, the driving rod (2) penetrates and is slidably connected to the air preheater, the driving rod (2) is slidably connected to the moving frame (6), and the driving device comprises a pushing member (11) which is transmission-connected to the driving rod (2), and the pushing member (11) is used to push the end of the driving rod (2) to move on the moving frame (6).

6. A boiler air preheater ash cleaning device according to claim 5, characterized in that: The movable frame (6) is provided with a long slide groove (7), the adjusting rod (3) is vertically arranged in the long slide groove (7), and the movable frame (6) is provided with a baffle (8) abutting against the end of the driving rod (2).

7. The boiler air preheater ash cleaning device according to claim 1, characterized in that: Cleaning sheets (9) are arranged at intervals on the outer sides of the two cleaning plates (1) in the length direction, and the two opposite cleaning sheets (9) are both in an arc shape bending inwards.

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