Rake type ash remover for preventing denitration catalyst from being blocked

Abstract

The utility model relates to a rake type deashing device for preventing denitration catalyst from being blocked, which comprises a denitration reactor shell and a deashing main pipe, one side of the deashing main pipe is connected with a deashing transverse rake pipe, the surface of the deashing transverse rake pipe is provided with a cleaning channel, and the inside of the cleaning channel is detachably connected with a sealing gland. Sealing can be achieved after the sealing gland and the cleaning channel are completely matched, transverse rake pipe cover plates are detachably arranged on the two sides of the ash removal transverse rake pipe, and a plurality of ash removal air holes are formed in the side, close to the interior of the denitration reactor shell, of the ash removal transverse rake pipe. According to the utility model, when the ash removal transverse rake pipe is blocked, in order to prevent a catalyst from being completely blocked, the sealing gland can be rotated to be gradually separated from the interior of the cleaning channel, and an external blowing tool or a cleaning tool is inserted into the cleaning channel to continuously clean the interior of the ash removal transverse rake pipe, so that the whole ash removal transverse rake pipe does not need to be dismantled when the ash removal transverse rake pipe is cleaned in this way; and subsequent maintenance and cleaning by workers are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of ash cleaners, in particular to a rake-type ash cleaner for preventing a denitration catalyst from being blocked. Background Art

[0002] In view of the high concentration, high hardness and fine ash content of raw ash at the end of cement kiln, an effective cleaning system is one of the keys to cement catalytic reduction denitrification. Therefore, in order to prevent dust from being deposited on the catalyst layer and improve the denitrification efficiency, a soot blowing device needs to be installed on each layer of catalyst. The rake soot blower uses the high-pressure airflow of compressed air or the impact force of the high-speed jet of superheated steam to remove the dust deposited on the catalyst. The rake soot blower sprays a high-speed compressed air flow from the small holes, and the ash particles and air molecules are separated by the force of the airflow so that they can be taken away by the flue gas or its own gravity.

[0003] The application announcement number is CN116651196A, which discloses a high-efficiency cleaning device for a cement kiln flue gas denitrification system. Combined with its specification and drawings, its solution is to utilize the small blowing holes on the inner wall of the bottom end of the cross-rake pipe. The small blowing holes are inverted cone shape and are arranged in a manner that the air outlet area gradually increases. While ensuring the cleaning effect, it can effectively reduce the damage of the gas to the catalyst surface. However, due to the high smoke concentration inside the cement kiln, the inside of the cross-rake pipe may be blocked after long-term operation. If the inside of the cross-rake pipe is blocked, the catalyst inside the cement kiln cannot be cleaned, and there is a potential risk of causing complete blockage of the catalyst. At this time, when cleaning the cross-rake pipe, the entire cross-rake pipe needs to be disassembled, which brings inconvenience to the cleaning. Summary of the invention

[0004] The utility model mainly aims at the problems existing in the operation of the dust cleaning device and invents a rake type dust cleaner which can prevent the denitration catalyst from being blocked. When the dust cleaning horizontal rake pipe is cleaned, the sealing pressure cover can be rotated to gradually separate it from the inside of the cleaning channel, and the pressing boss no longer presses the sealing gasket. The inside of the dust cleaning horizontal rake pipe can be continuously cleaned by inserting an external air blowing or cleaning tool into the inside of the cleaning channel. After the dust cleaning horizontal rake pipe has been cleaned for a period of time, the horizontal rake pipe covers on both sides are removed, and the dust can be discharged in a concentrated manner. The dust cleaning air holes can also be inserted into the inside of the dust cleaning air holes by using an external air blowing tool, so that the dust cleaning air holes are no longer blocked.

[0005] The inventive objective of the utility model is achieved through the following technical solutions: a rake-type dust cleaner for preventing clogging of a denitration catalyst, comprising a denitration reactor shell, a cleaning main pipe is arranged inside the denitration reactor shell, a cleaning horizontal rake pipe is connected to one side of the cleaning main pipe, a cleaning channel is arranged on the surface of the cleaning horizontal rake pipe, a sealing gland is detachably connected to the inside of the cleaning channel, and sealing can be achieved when the sealing gland and the cleaning channel are fully matched, horizontal rake pipe cover plates are detachably arranged on both sides of the cleaning horizontal rake pipe, and a plurality of cleaning air holes are arranged on one side of the cleaning horizontal rake pipe close to the inside of the denitration reactor shell.

[0006] Preferably, a sealing gasket is provided inside the cleaning channel, and a threaded rod and a clamping boss are provided on one side of the sealing gland, the threaded rod is threadedly connected to the inside of the cleaning channel, and the clamping boss can clamp the sealing gasket.

[0007] Preferably, a pipe connecting assembly and an air duct guide are provided between the cleaning main pipe and the cleaning cross rake pipe, a plurality of pipe connecting assemblies are connected to one side of the cleaning main pipe, an air duct guide is provided at the end of each of the pipe connecting assemblies, and one end of the air duct guide is connected to the cleaning cross rake pipe.

[0008] 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.

[0009] Preferably, an angle straightening assembly is provided between adjacent cleaning horizontal rake pipes.

[0010] Preferably, the angle straightening assembly includes a first straightening circular tube, a plurality of straightening support plates are provided on the side walls 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.

[0011] 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.

[0012] Preferably, a honeycomb denitration catalyst is placed inside the shell of the denitration reactor.

[0013] Compared with the prior art, the utility model has the following beneficial effects: 1. When the cleaning horizontal rake pipe is blocked, in order to prevent the catalyst from being completely blocked, when cleaning the cleaning horizontal rake pipe, the sealing pressure cover can be rotated to gradually separate it from the inside of the cleaning channel, and the clamping boss no longer presses the sealing gasket. The inside of the cleaning horizontal rake pipe can be continuously cleaned by inserting an external blowing or cleaning tool into the inside of the cleaning channel. This method of cleaning does not require the removal of the entire cleaning horizontal rake pipe, which is convenient for workers to perform subsequent maintenance and cleaning and improves work efficiency. 2. After the cleaning horizontal rake pipe has been cleaned for a period of time, the horizontal rake pipe covers on both sides are removed, and the dust can be discharged in a concentrated manner. The cleaning air holes can also be inserted into the cleaning air holes using an external blowing tool, so that the cleaning air holes are no longer blocked, and the cooperation between the horizontal rake pipe cover and the sealing pressure cover greatly improves the cleaning efficiency of the cleaning horizontal rake pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the utility model after the shell of the denitration reactor is removed;

[0016] Figure 3 It is a partial stereogram of the utility model;

[0017] Figure 4 It is a partial stereogram of the utility model;

[0018] Figure 5 It is a three-dimensional diagram of the utility model.

[0019] Markings in the figure: 1. DeNOx reactor shell; 2. Cleaning main pipe; 3. Cleaning horizontal rake pipe; 31. Cleaning channel; 32. Sealing gland; 33. Horizontal rake pipe cover; 34. Cleaning air hole; 35. Sealing gasket; 36. Straightening support plate; 321. Threaded rod; 322. Clamping boss; 4. Pipe connection assembly; 41. Upper flange; 42. Lower flange; 5. Duct guide; 6. Angle straightening assembly; 61. First straightening circular tube; 62. Second straightening circular tube. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0021] like Figures 1 to 5As shown, a rake-type dust cleaner for preventing clogging of a denitration catalyst comprises a denitration reactor shell 1, a honeycomb denitration catalyst is placed inside the denitration reactor shell 1, a dust cleaning pipe 2 is arranged inside the denitration reactor shell 1, the dust cleaning pipe 2 is connected to an external gas passage, one side of the dust cleaning pipe 2 is connected to a plurality of pipeline connection components 4, an end of each of the pipeline connection components 4 is provided with an air duct guide 5, one end of the air duct guide 5 is connected to a dust cleaning horizontal rake pipe 3, The pipe connection assembly 4 includes an upper flange 41 and a lower flange 42, and the upper flange 41 and the lower flange 42 are sealed and connected by screws. The top of the upper flange 41 is connected to the cleaning main pipe 2, and the bottom of the lower flange 42 is connected to the cleaning horizontal rake pipe 3 through the air duct guide 5. After this arrangement, during the installation process, each cleaning horizontal rake pipe 3 is controlled by the connection angle between the upper flange 41 and the lower flange 42, and the air duct guide 5 ensures that the gas inside the cleaning main pipe 2 can flow normally into the inside of the cleaning horizontal rake pipe 3.

[0022] In this embodiment, the surface of the cleaning horizontal rake pipe 3 is provided with a cleaning channel 31, and the interior of the cleaning channel 31 is detachably connected with a sealing gland 32, and the sealing gland 32 and the cleaning channel 31 can be sealed after they are fully matched. Specifically, the interior of the cleaning channel 31 is provided with a sealing gasket 35, and the sealing gasket 35 can be made of silicone material. One side of the sealing gland 32 is provided with a threaded rod 321 and a clamping boss 322, and the threaded rod 321 is threadedly connected to the interior of the cleaning channel 31. Whenever the clamping boss 322 can clamp the sealing gasket 35, whenever the threaded rod 321 is fully matched with the cleaning After entering the interior of the channel 31, the pressing boss 322 can press the sealing gasket 35 so that the entire cleaning horizontal rake pipe 3 will not leak. The two sides of the cleaning horizontal rake pipe 3 are detachably provided with horizontal rake pipe covers 33. The cleaning horizontal rake pipe 3 is provided with a plurality of cleaning air holes 34 on one side close to the interior of the denitration reactor shell 1. The air of the cleaning main pipe 2 passes through the pipe connecting assembly 4, the air duct guide 5 and the cleaning horizontal rake pipe 3 in turn, and is finally discharged through the cleaning air holes 34. The cleaning air holes 34 can remove the catalyst inside the denitration reactor shell 1 to ensure that the catalyst will not be blocked and can work normally.

[0023] In this embodiment, an angle straightening component 6 is provided between adjacent cleaning transverse rake pipes 3, and the angle straightening component 6 includes a first straightening circular tube 61. A plurality of straightening support plates 36 are provided on the side wall of the cleaning transverse rake pipe 3. A first straightening circular tube 61 is provided between adjacent straightening support plates 36 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 36. A second straightening circular tube 62 is also provided between adjacent straightening support plates 36 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 intersected with the first straightening circular tube 61. Fork, both ends of the second straightening circular tube 62 are also hinged to the surface of the straightening support plate 36. After this arrangement, whenever the cleaning horizontal rake pipe 3 is installed, the first straightening circular tube 61 and the second straightening circular tube 62 are rotated on the straightening support plate 36 to adjust the cleaning horizontal rake pipe 3 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 3, thereby finally achieving that each cleaning horizontal rake pipe 3 is in a vertical state relative to the cleaning main pipe 2.

[0024] Working principle and usage of this utility model:

[0025] Since the shell 1 of the denitrification reactor is inside the cement kiln smoke, the smoke dust content is very high. If the entire cleaning device is operated for a long time, the inside of the cleaning horizontal rake pipe 3 or the cleaning air hole 34 will be blocked. When blocked, the catalyst inside the cement kiln cannot be cleaned. At this time, the cleaning horizontal rake pipe 3 needs to be cleaned. First, rotate the sealing cover 32 to gradually separate it from the inside of the cleaning channel 31. At this time, the clamping boss 322 no longer presses the sealing gasket 35. Then, an external blowing tool can be used to insert into the inside of the cleaning channel 31, and the gas will continuously blow the inside of the cleaning horizontal rake pipe 3. After blowing for a period of time, the horizontal rake pipe cover plates 33 on both sides are removed. At this time, the dust can be discharged in a concentrated manner, and the cleaning air holes 34 can also be inserted into the cleaning air holes 34 using an external blowing tool, so that the cleaning air holes 34 are no longer blocked.

[0026] 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 dust cleaner for preventing clogging of a denitration catalyst, comprising a denitration reactor housing (1), characterized in that: A cleaning main pipe (2) is provided inside the shell (1) of the denitration reactor. A cleaning horizontal rake pipe (3) is connected to one side of the cleaning main pipe (2). A cleaning channel (31) is provided on the surface of the cleaning horizontal rake pipe (3). A sealing gland (32) is detachably connected to the inside of the cleaning channel (31). When the sealing gland (32) and the cleaning channel (31) are fully matched, sealing can be achieved. Removable horizontal rake pipe cover plates (33) are provided on both sides of the cleaning horizontal rake pipe (3). A plurality of cleaning air holes (34) are provided on one side of the cleaning horizontal rake pipe (3) close to the inside of the denitration reactor shell (1).

2. The rake-type dust cleaner for preventing clogging of the denitration catalyst according to claim 1, characterized in that: A sealing gasket (35) is provided inside the cleaning channel (31), and a threaded rod (321) and a pressing boss (322) are provided on one side of the sealing gland (32), wherein the threaded rod (321) is threadedly connected to the inside of the cleaning channel (31), and the pressing boss (322) is capable of pressing the sealing gasket (35).

3. The rake-type dust cleaner for preventing clogging of the denitration catalyst according to claim 2, characterized in that: A pipe connection assembly (4) and an air duct guide (5) are provided between the cleaning main pipe (2) and the cleaning horizontal rake pipe (3); one side of the cleaning main pipe (2) is connected to a plurality of pipe connection assemblies (4); an air duct guide (5) is provided at the end of each pipe connection assembly (4); and one end of the air duct guide (5) is connected to the cleaning horizontal rake pipe (3).

4. The rake-type dust cleaner for preventing clogging of the denitration catalyst according to claim 3, characterized in that: The pipe connection assembly (4) comprises an upper flange (41) and a lower flange (42), wherein the upper flange (41) and the lower flange (42) are sealed and connected by means of screws, the top of the upper flange (41) is connected to the dust cleaning main pipe (2), and the bottom of the lower flange (42) is connected to the dust cleaning horizontal rake pipe (3) via an air duct guide (5).

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

6. The rake-type dust cleaner for preventing clogging of the denitration catalyst according to claim 5, characterized in that: The angle straightening assembly (6) comprises a first straightening circular tube (61), a plurality of straightening support plates (36) are provided on the side wall of the dust cleaning horizontal rake pipe (3), a first straightening circular tube (61) is provided between adjacent straightening support plates (36) along the direction of the dust cleaning main pipe (2), and an end of the first straightening circular tube (61) is hinged to the surface of the straightening support plate (36).

7. The rake-type dust cleaner for preventing clogging of the denitration catalyst according to claim 6, characterized in that: A second straightening circular tube (62) is also provided between adjacent straightening support plates (36) along the direction of the cleaning main pipe (2); the first straightening circular tube (61) is parallel to the 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 (36).

8. The rake-type dust cleaner for preventing clogging 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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