Rake type soot blower capable of preventing soot deposition

Abstract

A rake type soot blower capable of preventing soot deposition comprises a blowing pipe and a nozzle arranged on the blowing pipe, the blowing pipe is arranged above a catalyst protection layer, the nozzle used for spraying airflow is arranged on the blowing pipe, a soot scraping plate is arranged at the front end of the blowing pipe, a bristle assembly is arranged below the scraping face of the soot scraping plate, and the bristle assembly is connected with the blowing pipe. And the bristle assembly is in contact with the surface of the catalyst protection layer. According to the rake type soot blower, the soot scraping plate is arranged at the front end of the blowing pipe of the rake type soot blower, so that accumulated soot on a catalyst protection layer is effectively cleaned, meanwhile, large thick dust is preliminarily cleaned, residual dust is further cleaned through the bristle assembly below the soot scraping plate, and a soot layer attached to the surface of the catalyst protection layer is disturbed; dust can be blown away by airflow sprayed out of the nozzle more easily, accumulated dust on the catalyst protection layer can be cleaned more efficiently, the flue gas purification efficiency is improved, and the service life of the catalyst protection layer is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of soot blowing device technology, and in particular to a rake-type soot blower that prevents ash accumulation. Background Technology

[0002] In many industrial fields such as cement production and air purification, flue gas is often passed through a catalyst protective layer to achieve effective purification. However, flue gas typically carries a large amount of dust, which gradually accumulates as it passes through the catalyst protective layer, forming ash. Over time, when the ash reaches a certain thickness, it agglomerates and falls onto the surface of the catalyst protective layer. The presence of ash not only affects the contact area between the catalyst protective layer and the flue gas, reducing catalytic reaction efficiency, but in severe cases, it can even lead to catalyst deactivation, significantly impacting the normal operation and purification effect of the entire flue gas purification system.

[0003] Currently, rake soot blowers are commonly used in the industry to clean ash buildup on catalyst protective layers. However, existing rake soot blowers have revealed several drawbacks in practical applications. On the one hand, when ash forms clumps, ordinary rake soot blowers struggle to effectively remove it from the catalyst protective layer surface, causing these clumps to continuously negatively impact the performance of the protective layer. On the other hand, even if some of the clumps are removed, existing rake soot blowers are even less effective at handling fine dust particles and stubborn dust tightly adhering to the catalyst protective layer surface, failing to achieve a comprehensive and thorough cleaning and preventing the catalyst protective layer from maintaining optimal working condition. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned problems by proposing a rake-type soot blower that prevents ash accumulation.

[0005] To achieve the above objectives, the following technical solution was adopted:

[0006] A rake-type soot blower for preventing ash accumulation includes a blowpipe and a nozzle for spraying airflow. The blowpipe is disposed above a catalyst protective layer, and the nozzle is disposed on the blowpipe. A scraper is provided at the front end of the blowpipe, and a bristle assembly is provided below the scraping surface of the scraper. The bristle assembly is in contact with the surface of the catalyst protective layer.

[0007] Furthermore, the scraper is a flat plate with its surface perpendicular to the surface of the catalyst protective layer.

[0008] Furthermore, the distance between the scraper blade and the nozzle is 150-300mm, and when the scraper blade is moved to the end of its stroke, the spray axis of the nozzle coincides with the area to be cleared by the scraping surface.

[0009] Furthermore, the bristles of the brush assembly are wavy, curly steel bristles or ceramic fiber bundles, with a bristle length of 20-50 mm and a diameter of 0.1-0.5 mm.

[0010] Furthermore, the angle between the brush assembly and the scraper plate is 30°-60°, forming a funnel-shaped guide gap that is narrow at the top and wide at the bottom.

[0011] Furthermore, the outlet axis of the nozzle points to the root of the bristles of the bristle assembly, and the airflow impact direction is at an angle to the bristle axis.

[0012] Furthermore, the surfaces of the scraper and the brush assembly are coated with a superhydrophobic coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By installing a scraper at the front end of the spray pipe of the rake sootblower, the physical scraping action of the scraper can directly and effectively remove the blocky dust and large amounts of accumulated dust formed on the surface of the catalyst protective layer due to a certain thickness of ash accumulation. Compared with the traditional rake sootblower, it greatly improves the cleaning ability of blocky ash accumulation and thicker dust, avoids the catalyst protective layer from being affected by long-term ash accumulation, and improves the purification efficiency of the flue gas purification system.

[0015] By placing the scraper blade at the front end of the blowpipe, the scraper blade can remove the accumulated dust in advance when the rake-type sootblower is working, and perform preliminary cleaning of large areas and relatively thick dust. This creates conditions for the subsequent sootblower to better clean the residual dust, improves cleaning efficiency, reduces the working time of the sootblower, and saves the energy consumption of the sootblower.

[0016] A brush assembly is installed beneath the scraper blade, effectively cleaning fine dust that is difficult to remove by the scraper blade, as well as stubborn dust that adheres tightly to the surface of the catalyst protective layer. The dense structure and flexibility of the bristles allow them to penetrate deep into the tiny pores and uneven areas of the catalyst protective layer surface, brushing off residual fine dust. This solves the problem of traditional soot blowers in cleaning such dust, further improving the cleanliness of the catalyst protective layer surface. Attached Figure Description

[0017] Figure 1 A schematic diagram of a rake-type soot blower designed to prevent ash accumulation;

[0018] Figure 2 A schematic diagram of a rake-type soot blower designed to prevent ash accumulation;

[0019] Figure 3 A schematic diagram of the scraper plate structure of a rake-type soot blower for preventing ash accumulation; Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0021] As shown in Figure 1, this application provides a rake-type soot blower for preventing ash accumulation, including a blowpipe 1 and nozzles 2 for ejecting airflow. The blowpipe 1 is positioned above a catalyst protective layer 3, and the nozzles 2 are made of a high-temperature resistant and corrosion-resistant metal. The blowpipe 1 has several nozzles 2 for ejecting airflow, which is directed towards the windward side of the catalyst protective layer 3.

[0022] A rectangular scraper 4 is provided horizontally at the front end of the blowing pipe 1. The scraper 4 is connected to the blowing pipe by bolts and nuts. The scraper 4 does not directly contact the catalyst protective layer 3, but leaves a gap to ensure that the scraper 4 will not damage the catalyst protective layer 3 during movement.

[0023] Furthermore, the scraper blade 4 has a flat plate structure, with its surface perpendicular to the surface of the catalyst protective layer 3. This perpendicularity ensures that the scraper blade 4 can maintain full contact with the catalyst protective layer 3 during movement, while preventing dust from remaining on its surface. Moreover, the flat plate structure of the scraper blade 4 is relatively simple to manufacture and has lower production costs.

[0024] Furthermore, the distance between the scraper blade 4 and the nozzle 2 is 200mm. Maintaining a certain distance ensures that after the scraper blade 4 scrapes off large pieces of dust, the airflow from the nozzle 2 can effectively clean up the scraped dust and any remaining fine dust that the scraper blade 4 failed to remove completely within a suitable distance. When the scraper blade 4 reaches the end of its stroke, the spray axis of the nozzle 2 coincides with the area cleaned by the scraping surface. This ensures that after the scraper blade 4 completes its scraping action, the airflow from the nozzle 2 accurately covers the area just scraped by the scraper blade 4, further shortening the interval between scraping and blowing actions, avoiding blind spots, and ensuring that thicker dust is scraped away while residual dust is dispersed by the airflow from the nozzle 2.

[0025] The brush assembly 5 is welded below the scraper plate 4. The bristles of the brush assembly 5 are wavy, curled steel bristles or ceramic fiber bundles, with a bristle length of 20mm and a diameter of 0.5mm. The brush assembly 5 is in contact with the surface of the catalyst protective layer 3. The wavy brush assembly 5 has elastic properties, and when it comes into contact with the surface of the catalyst protective layer 3, it effectively brushes off and bounces off the fine and stubborn dust adhering to these surfaces, achieving the effect of disturbing the dust, so that the airflow blown out by the subsequent nozzle 2 can more easily blow away the dust.

[0026] Furthermore, the angle between the brush assembly 5 and the scraper plate 4 is 30°-60°, forming a funnel-shaped flow guide gap that is narrower at the top and wider at the bottom. This funnel-shaped flow guide gap can guide the dust scraped off from the scraper plate 4 and the dust cleaned by the brush, allowing it to flow downwards more smoothly and preventing dust from accumulating locally on the brush assembly 5, thus improving dust cleaning efficiency. The wider bottom part is conducive to airflow diffusion and can clean the surface of the catalyst protective layer 3 over a wider area.

[0027] Furthermore, the outlet axis of nozzle 2 points towards the root of the bristles of the bristle assembly 5, and the airflow impact direction is at an angle to the axis of the bristle assembly 5. The airflow impacts the root of the bristles, causing the bristle assembly 5 to vibrate more violently and effectively under the action of the airflow. This allows the bristle assembly 5 to sweep up the fine and stubborn dust adhering to the surface of the catalyst protective layer 3, making the dust layer on the surface of the catalyst protective layer 3 loose and easier to blow away by the soot blower. The angle between the airflow impact direction and the bristle axis avoids the airflow directly impacting the surface of the catalyst protective layer 3 vertically, thus preventing excessive dust from being stirred up and reducing the risk of secondary pollution. On the other hand, the inclined airflow can push the dust along the direction of the bristles, blowing the dust cleaned by the bristles away from the surface of the catalyst protective layer 3 in a specific direction.

[0028] Furthermore, the surfaces of the scraper plate 4 and the bristle assembly 5 are coated with a superhydrophobic coating. Applying a coating to the surfaces of the scraper plate 4 and the bristle assembly 5 can prevent dust from adhering to the scraper plate 4 or the bristle assembly 5, reducing the risk of secondary pollution. It can also prevent dust from accumulating in the bristle assembly 5, thus preventing large clumps of dust from forming inside the bristle assembly 5.

[0029] When in use, the blowpipe 1 of the rake soot blower is close to the surface of the catalyst protective layer 3, and the nozzle 2 on the blowpipe 1 sprays out a high-speed and powerful airflow. Simultaneously, the spray pipe 1 of the rake-type soot blower begins to move smoothly, and the scraper 4 moves synchronously with the spray pipe 1, starting to work above the catalyst protective layer 3. The brush assembly 5 below the scraper 4 makes soft contact with the surface of the catalyst protective layer 3. When encountering large pieces of dust or thick accumulations of dust, the scraper 4 makes contact first, pushing the large pieces of dust or thick accumulations of dust flat. Then, the airflow from the nozzle 2 sweeps and disturbs the flattened and residual dust, blowing the dust off the surface of the catalyst protective layer 3. While the scraper 4 scrapes away the dust, the brush assembly 5, with its own elasticity, continuously penetrates into tiny gaps and depressions, sweeping up residual fine dust and tightly attached stubborn dust. Under the coordination of the airflow from the nozzle 2, it vibrates, disturbing the dust layer on the surface of the catalyst protective layer 3, making it easier for the airflow to blow it away. Then the spray pipe 1 of the rake soot blower reciprocates, moving back and forth on the surface of the catalyst protective layer 3, thereby achieving comprehensive and efficient cleaning of the surface of the catalyst protective layer 3.

[0030] In this embodiment, while ensuring that the catalyst protective layer 3 is not damaged, a deep and comprehensive cleaning of the ash accumulation on the surface of the catalyst protective layer 3 is achieved, which significantly improves the purification efficiency of the flue gas purification system and effectively extends the service life of the catalyst protective layer 3, demonstrating extremely high practical value and application potential.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of this application. Those skilled in the art may find other optimizations and additional functions in this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rake-type soot blower for preventing ash accumulation, comprising a blowpipe (1) and a nozzle (2) for ejecting airflow, characterized in that, The blow pipe (1) is positioned above the catalyst protective layer (3), the nozzle (2) is positioned on the blow pipe (1), the front end of the blow pipe (1) is provided with a scraper (4), and a bristle assembly (5) is provided below the scraping surface of the scraper (4), and the bristle assembly (5) is in contact with the surface of the catalyst protective layer (3).

2. The rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The scraper plate (4) is a flat plate structure, and its plate surface is perpendicular to the surface of the catalyst protective layer (3).

3. A rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The distance between the scraper blade (4) and the nozzle (2) is 150-300mm, and when the scraper blade (4) is moved to the end of its stroke, the spray axis of the nozzle (2) coincides with the scraping surface cleaning area of ​​the scraper blade (4).

4. A rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The bristles of the bristle assembly (5) are wavy, curly steel bristles or ceramic fiber bundles, with a bristle length of 20-50 mm and a diameter of 0.1-0.5 mm.

5. A rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The angle between the brush assembly (5) and the scraper plate (4) is 30°-60°, forming a trumpet-shaped guide gap that is narrow at the top and wide at the bottom.

6. A rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The outlet axis of the nozzle (2) points to the root of the bristles of the bristle assembly (5), and the airflow impact direction is at an angle to the bristle axis.

7. A rake-type soot blower for preventing ash accumulation as described in claim 1, characterized in that, The surfaces of the scraper (4) and the brush assembly (5) are coated with a superhydrophobic coating.

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