Rake type ash removal device for improving ash removal efficiency of denitration catalyst

Abstract

The utility model relates to a rake type deashing device for improving the deashing efficiency of denitration catalyst, which comprises a denitration reactor shell, a deashing main pipe is arranged in the denitration reactor shell, a plurality of pipeline connecting components are arranged on one side of the deashing main pipe, an air duct guide piece is arranged at the end part of each pipeline connecting component, and a plurality of air duct guide pieces are arranged on the other side of the deashing main pipe. One end of the air duct guide piece is connected with an ash removal transverse rake pipe, a plurality of ash removal air holes are formed in one side of the ash removal transverse rake pipe, and the ash removal air holes in the part, close to the inner wall of the denitration reactor shell, of the ash removal transverse rake pipe are close to the inner wall of the denitration reactor shell; according to the utility model, in the ash removal process, the ash removal air holes in the ash removal transverse rake pipes on the two sides can blow away the ash close to the inner wall of the denitration reactor shell, so that the dead angles during ash removal are greatly reduced, and the ash removal area is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of ash cleaners, in particular to a rake-type ash cleaner capable of improving the ash cleaning efficiency of a denitration catalyst. Background Art

[0002] At present, the flue gas produced by cement plants must be treated by a denitrification system containing a catalyst and meet the standards before it is allowed to be discharged. In order to ensure the activity of the catalyst, most projects are equipped with soot blowers to clean it. In view of the high concentration, high hardness and fine ash content of raw ash at the end of the kiln in the cement industry, an effective cleaning system is one of the keys to determining the catalytic reduction denitrification of cement. The high-speed compressed air flow sprayed from the small holes of the rake-type cleaner separates the ash particles and air molecules through the force of the airflow, destroys and prevents the ash particles from combining on the catalyst surface, and puts them in a suspended fluidized state so that they can be carried away by the flue gas or its own gravity.

[0003] The application announcement number is CN116870696A, which discloses a rake-type sootblowing device. Combined with its specification and drawings, its scheme is to use heated compressed air to perform rake-type sootblowing on the catalyst surface, thereby achieving the advantage of a rake-type sootblower with a strong sootblowing force. However, when adopting this scheme, since the nozzle on the rake pipe is located in the middle, there is a certain dead angle when cleaning the catalyst inside the denitrification reactor, and the cleaning area is small, resulting in a low cleaning efficiency for the catalyst. Summary of the invention

[0004] The utility model mainly aims at the problems existing in the operation of the soot blowing device and invents a rake type soot cleaner which improves the cleaning efficiency of the denitration catalyst. During the cleaning process, the cleaning air holes on the cleaning horizontal rake pipes on both sides can blow away the dust located near the inner wall of the shell of the denitration reactor; the first straightening circular tube and the second straightening circular tube are fixed with welding wire after being rotated and adjusted to a suitable angle, so that a stable triangular structure is formed between the first straightening circular tube, the second straightening circular tube and the cleaning horizontal rake pipe, so that each cleaning horizontal rake pipe is finally vertical relative to the cleaning main pipe.

[0005] The invention objective of the utility model is achieved through the following technical scheme: a rake-type cleaner for improving the cleaning efficiency of a denitration catalyst, comprising a denitration reactor shell, a cleaning main pipe is provided inside the denitration reactor shell, a plurality of pipe connection components are provided on one side of the cleaning main pipe, an air duct guide is provided at the end of each of the pipe connection components, a cleaning horizontal rake pipe is connected to one end of the air duct guide, a plurality of cleaning air holes are provided on one side of the cleaning horizontal rake pipe, and a plurality of cleaning air holes on the cleaning horizontal rake pipe close to the inner wall of the denitration reactor shell are close to the inner wall of the denitration reactor shell.

[0006] Preferably, the air duct guide is a vertical square-circular pipe or an inclined square-circular pipe, and the one close to the denitration reactor shell is an inclined square-circular pipe.

[0007] Preferably, the pipe connection assembly includes an upper flange and a lower flange, the upper flange and the lower flange are sealed and connected by screws, the top of the upper flange is connected to the ash cleaning main pipe, and the bottom of the lower flange is connected to the ash cleaning horizontal rake pipe through an air duct guide.

[0008] Preferably, an angle straightening assembly is provided between adjacent cleaning horizontal rake pipes.

[0009] Preferably, the angle straightening assembly includes a first straightening circular tube, a straightening support plate is provided on the side wall of the cleaning cross rake pipe, a first straightening circular tube is provided between adjacent straightening support plates along the direction of the cleaning main pipe, and an end of the first straightening circular tube is hinged to the surface of the straightening support plate.

[0010] Preferably, a second straightening circular tube is provided between adjacent straightening support plates along the direction of the cleaning main pipe, the first straightening circular tube is parallel to the cleaning main pipe, the second straightening circular tube crosses the first straightening circular tube, and both ends of the second straightening circular tube are also hinged to the surface of the straightening support plate.

[0011] Preferably, a honeycomb denitration catalyst is placed inside the shell of the denitration reactor.

[0012] Compared with the prior art, the utility model has the following beneficial effects: 1. During the cleaning process, the cleaning air holes on the cleaning horizontal rake pipes on both sides can blow away the dust located near the inner wall of the denitrification reactor shell, greatly reducing the dead angle during cleaning, increasing the cleaning area, and thus improving the cleaning efficiency of the denitrification catalyst; 2. After the first straightening circular tube and the second straightening circular tube are rotated and adjusted to a suitable angle, they are fixed with welding wire, so that a stable triangular structure is formed between the first straightening circular tube, the second straightening circular tube and the cleaning horizontal rake pipe, thereby ultimately achieving that each cleaning horizontal rake pipe is in a vertical state relative to the cleaning main pipe, and this arrangement is conducive to the installation of the cleaning horizontal rake pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 This is a three-dimensional diagram of the utility model after the shell of the denitration reactor is removed;

[0015] Figure 3 This is a three-dimensional diagram of the utility model after the shell of the denitration reactor is removed;

[0016] Figure 4 This is a stereoscopic diagram of the utility model after the shell of the denitration reactor is removed.

[0017] Markings in the figure: 1. Denitrification reactor shell; 2. Ash cleaning main pipe; 3. Pipe connection assembly; 31. Upper flange; 32. Lower flange; 4. Air duct guide; 41. Vertical square to round pipe; 42. Inclined square to round pipe; 5. Ash cleaning horizontal rake pipe; 51. Ash cleaning air holes; 52. Straightening support plate; 6. Angle straightening assembly; 61. First straightening round pipe; 62. Second straightening round pipe. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0019] like Figures 1 to 4 As shown, a rake-type ash cleaner for improving the cleaning efficiency of a denitration catalyst comprises a denitration reactor shell 1, a ash cleaning main pipe 2 is arranged inside the denitration reactor shell 1, the ash cleaning main pipe 2 is an air inlet passage connected to the outside, a plurality of pipe connection components 3 are arranged on one side of the ash cleaning main pipe 2, an air duct guide 4 is arranged at the end of each of the pipe connection components 3, the air duct guide 4 is a vertical square-circular pipe 41 or an inclined square-circular pipe 42, the inclined square-circular pipe 42 is close to the side wall of the denitration reactor shell 1, the pipe connection component 3 comprises an upper flange 31 and a lower flange 32, the upper flange 31 and the lower flange 32 are sealed and connected by screws, the top of the upper flange 31 is connected to the ash cleaning main pipe 2, the bottom of the lower flange 32 is connected to the ash cleaning horizontal rake pipe 5, a plurality of ash cleaning air holes 51 are arranged on one side of the ash cleaning horizontal rake pipe 5, and the plurality of ash cleaning air holes 51 on the ash cleaning horizontal rake pipe 5 close to the inner wall of the denitration reactor shell 1 are close to the denitration reactor shell 1. The inner wall of the reactor shell 1, the interior of the denitration reactor shell 1 is provided with a honeycomb denitration catalyst. After such arrangement, when the catalyst inside the denitration reactor shell 1 is cleaned, the cleaning air holes 51 on the cleaning horizontal rake pipes 5 on both sides can blow away the dust located near the inner wall of the denitration reactor shell 1, which greatly reduces the dead angle during cleaning and increases the cleaning area. The detachable design between the upper flange 31 and the lower flange 32 can not only facilitate the early installation and debugging, so that the cleaning horizontal rake pipe 5 can be at a suitable angle, but also facilitate disassembly and cleaning in the event of subsequent dust blockage. It should be noted that since the gas flow direction of the cross section of the vertical square-to-circular pipe 41 and the inclined square-to-circular pipe 42 is similar to a trumpet mouth, air can flow smoothly from top to bottom into the interior of the cleaning horizontal rake pipe 5. Compared with the straight pipe or round pipe connected to the cleaning horizontal rake pipe 5 at 90 degrees, this connection can make the gas flow smooth, so that the subsequent cleaning wind force is guaranteed.

[0020] In this embodiment, an angle straightening assembly 6 is provided between adjacent cleaning transverse rake pipes 5. Specifically, the angle straightening assembly 6 includes a first straightening circular tube 61. A straightening support plate 52 is provided on the side wall of the cleaning transverse rake pipe 5. A first straightening circular tube 61 is provided between adjacent straightening support plates 52 along the direction of the cleaning main pipe 2. The end of the first straightening circular tube 61 is hinged to the surface of the straightening support plate 52. A second straightening circular tube 62 is also provided between adjacent straightening support plates 52 along the direction of the cleaning main pipe 2. The first straightening circular tube 61 is parallel to the cleaning main pipe 2, and the second straightening circular tube 62 is parallel to the first straightening circular tube 6 1, and both ends of the second straightening circular tube 62 are also hinged to the surface of the straightening support plate 52. After this arrangement, whenever the cleaning horizontal rake pipe 5 is installed, the first straightening circular tube 61 and the second straightening circular tube 62 are rotated on the straightening support plate 52 to adjust the cleaning horizontal rake pipe 5 to a vertical state relative to the cleaning main pipe 2, wherein the first straightening circular tube 61 and the second straightening circular tube 62 are fixed with welding wire after being rotated and adjusted to a suitable angle, so that a stable triangular structure is formed among the first straightening circular tube 61, the second straightening circular tube 62 and the cleaning horizontal rake pipe 5, thereby finally achieving that each cleaning horizontal rake pipe 5 is in a vertical state relative to the cleaning main pipe 2.

[0021] Working principle and usage of this utility model:

[0022] When installing the cleaning horizontal rake pipe 5, the first straightening circular pipe 61 and the second straightening circular pipe 62 are rotated on the straightening support plate 52 to adjust the cleaning horizontal rake pipe 5 to a vertical state relative to the cleaning main pipe 2, wherein the first straightening circular pipe 61 and the second straightening circular pipe 62 are fixed with welding wire after being rotated and adjusted to a suitable angle, so that a stable triangular structure is formed between the first straightening circular pipe 61, the second straightening circular pipe 62 and the cleaning horizontal rake pipe 5, thereby finally realizing that each cleaning horizontal rake pipe 5 is vertical relative to the cleaning main pipe 2. In the vertical state, when the cleaning system starts to run, the valve opens, and the cleaning wind is passed into the cleaning main pipe 2. During the entire cleaning process, the cleaning main pipe 2 moves forward and backward at a uniform speed. The multiple cleaning holes 51 on the cleaning horizontal rake pipe 5 spray steam downward during the moving process to clean the catalyst dust accumulation area inside the denitrification reactor shell 1. During the cleaning process, the cleaning holes 51 on the cleaning horizontal rake pipes 5 on both sides can blow away the dust located near the inner wall of the denitrification reactor shell 1, which greatly reduces the dead angle during cleaning and increases the cleaning area.

[0023] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A rake-type ash cleaner for improving the cleaning efficiency of a denitration catalyst, comprising a denitration reactor housing (1), characterized in that: A cleaning main pipe (2) is provided inside the denitration reactor shell (1), a plurality of pipe connection components (3) are provided on one side of the cleaning main pipe (2), an air duct guide (4) is provided at the end of each of the pipe connection components (3), a cleaning horizontal rake pipe (5) is connected to one end of the air duct guide (4), a plurality of cleaning air holes (51) are provided on one side of the cleaning horizontal rake pipe (5), and the plurality of cleaning air holes (51) on the cleaning horizontal rake pipe (5) close to the inner wall of the denitration reactor shell (1) are close to the inner wall of the denitration reactor shell (1).

2. The rake-type ash cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 1, characterized in that: The air duct guide (4) is a vertical square-to-circular pipe (41) or an inclined square-to-circular pipe (42), and the one close to the denitration reactor shell (1) is an inclined square-to-circular pipe (42).

3. The rake-type ash cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 2, characterized in that: The pipe connection assembly (3) comprises an upper flange (31) and a lower flange (32), wherein the upper flange (31) and the lower flange (32) are sealed and connected by means of screws, the top of the upper flange (31) is connected to the dust cleaning main pipe (2), and the bottom of the lower flange (32) is connected to the dust cleaning horizontal rake pipe (5) via an air duct guide (4).

4. The rake-type ash cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 3, characterized in that: An angle straightening assembly (6) is provided between adjacent cleaning horizontal rake pipes (5).

5. The rake-type dust cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 4, characterized in that: The angle straightening assembly (6) comprises a first straightening circular tube (61), a straightening support plate (52) is provided on the side wall of the cleaning horizontal rake pipe (5), and first straightening circular tubes (61) are provided between adjacent straightening support plates (52) along the direction of the cleaning main pipe (2), and the end of the first straightening circular tube (61) is hinged to the surface of the straightening support plate (52).

6. The rake-type ash cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 5, characterized in that: A second straightening circular tube (62) is also provided between adjacent straightening support plates (52) along the direction of the dust cleaning main pipe (2); the first straightening circular tube (61) is parallel to the dust cleaning main pipe (2); the second straightening circular tube (62) intersects with the first straightening circular tube (61); and both ends of the second straightening circular tube (62) are also hinged to the surface of the straightening support plate (52).

7. The rake-type ash cleaner for improving the cleaning efficiency of the denitration catalyst according to claim 1, characterized in that: A honeycomb-type denitration catalyst is placed inside the denitration reactor shell (1).

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