A coal conveying pipeline particle filtering and recovering device for a power plant

Abstract

The application relates to the technical field of coal ash filtration, and discloses a power plant coal conveying pipeline particle filtration and recovery device, which comprises a front pipeline, the inner circumferential surface of the front pipeline is provided with a rolling filter screen, a rolling filter screen capable of rotating is additionally arranged in a coal conveying pipeline filtration structure and is matched with a top fan for blowing, the purpose is to solve the problems that coal cinder is easy to be hardened and difficult to be filtered, the filtration problem of sticky and wet coal cinder can be effectively solved, when the filter screen rotates, large-particle coal cinder is thrown to the periphery by centrifugal force, at this time, the directional constant-speed airflow of the upper half circle blown by the fan scatters the caked coal cinder, dust and particles existing in the coal mine are filtered, the combustion of the coal mine is more sufficient, the rolling filter screen rotation cooperates with the wind force to prevent the caked coal cinder from adhering to the filter screen and causing the mesh hole to be blocked, the frequency of manual cleaning is reduced, the device life can be prolonged, and the fuel loss can be reduced.

Description

Technical Field

[0001] This application belongs to the field of coal ash filtration technology, specifically a particle filtration and recovery device for coal conveying pipelines in power plants. Background Technology

[0002] Traditional thermal power plants typically use coal combustion to generate electricity. However, large coal particles are not easy to burn completely, and a lot of dust will be mixed in during the combustion process, which can easily cause air pollution when emitted. Therefore, coal is filtered during the crushing and transportation process to remove the coal slag that is not easy to burn completely.

[0003] For example, application CN114308606B discloses a particle filtration and recovery device for coal conveying pipelines in power plants, which includes a mounting assembly comprising a fixed base and a sealing plate. The fixed base has an L-shaped structure, and multiple sealing plates are provided and movably mounted on the fixed base. The device also includes a filter assembly comprising a filter tube and a recovery locking sleeve. The filter tube is placed on the fixed base, the sealing plate presses against the end of the filter tube, and the recovery locking sleeve is fitted onto the filter tube. This invention can be applied in coal crushing and filtration systems in thermal power plants, effectively filtering out coal slag particles and dust, and then recovering and crushing the coal slag particles for reuse, greatly increasing the reliability of complete coal combustion.

[0004] However, during the implementation of this application, it was found that the coal ash filtration structure in the application lacked efficiency and had poor filtration effect, and could not effectively filter sticky and wet coal slag. Utility Model Content

[0005] The purpose of this application is to provide a particle filtration and recovery device for coal conveying pipelines in power plants in order to solve the problems mentioned above.

[0006] The technical solution adopted in this application is as follows: A particle filtration and recovery device for a coal conveying pipeline in a power plant includes a front pipeline. A rolling filter screen is provided on the inner circumferential surface of the front pipeline. A rear fixing ring is fixedly connected to the rear end of the rolling filter screen. A gear is provided on the outer circumferential surface of the rear fixing ring. A fan is installed at the upper end of the outer circumferential surface of the front pipeline relative to the rolling filter screen. A connecting rod is connected along the circumference of the rear surface of the front pipeline. A rear pipeline is fixedly connected to the rear end of the connecting rod. A motor is installed on the outer circumferential surface of the rear pipeline relative to the rear fixing ring. A rotating tooth is provided at the front end of the motor. The rotating tooth meshes with the gear. A fixing block is connected from the lower end of the outer circumferential surface of the motor to the upper end of the outer circumferential surface of the rear pipeline.

[0007] By adopting the above technical solution, a rotating rolling filter screen is installed in the coal conveying pipeline filtration structure and purged by a top fan. The purpose is to solve the problem of coal slag being easy to clump and difficult to filter. It can effectively deal with the filtration problem of sticky and wet coal slag. When the filter screen rotates, large coal slag particles are thrown to the outside by centrifugal force. At this time, the directional and constant speed airflow of the upper semicircle blown by the fan breaks up the clumps of coal slag and filters the dust and particulate matter present in the coal mine, making the coal combustion more complete. The rotation of the rolling filter screen combined with the air force can also prevent coal slag from sticking and causing the mesh to become clogged, reducing the frequency of manual cleaning, and thus achieving the effect of extending equipment life and reducing fuel consumption.

[0008] In a preferred embodiment, a front curved pipe is welded to the front end surface of the front pipe, a flange is provided at the front end of the front curved pipe, and a rear curved pipe is welded to the rear end edge of the rear pipe.

[0009] By adopting the above technical solution, curved pipes are added to the front and rear ends of the filter device and connected by flanges. The design of the curved pipes can buffer the impact of coal flow input, avoid weld cracking caused by long-term vibration of straight pipe input, reduce the filter burden, and the flange connection facilitates quick disassembly and assembly of equipment for maintenance or replacement of filter screens, prevents interface deformation and leakage, reduces the overall structure space occupation rate, and improves system reliability.

[0010] In a preferred embodiment, a collection chamber is fixedly installed at the lower end of the front pipe.

[0011] By adopting the above technical solution, a collection bin is set at the lower end of the rolling filter screen, which can realize the recycling of coal slag. The collection bin stores the filtered particles in a concentrated manner by the gravity of the particles themselves, avoiding pollution caused by open-air stacking and saving the tedious process of manual slag removal.

[0012] In a preferred embodiment, a discharge pipe is installed through the center of the lower surface of the collection chamber, and an air pump is provided on the outer circumferential surface of the discharge pipe.

[0013] By adopting the above technical solution, a collection bin is set at the lower end of the rolling filter screen and an air pump is used to output particulate matter. The collection bin stores the filtered particulate matter by its own gravity. The air pump transports the slag through the pipeline to the combustion zone for reuse. This can prevent material accumulation and blockage in the bin, improve fuel utilization and protect the safety of the working environment.

[0014] In a preferred embodiment, an equipment protection chamber is installed on the upper end of the outer circumferential surface of the front pipe, and an air intake mesh is provided on the upper surface of the equipment protection chamber near the front edge.

[0015] By adopting the above technical solution, the protective chamber at the top of the filter device can isolate the fan and motor from direct contact with the external environment. The protective chamber can block coal dust and moisture from entering the equipment, prevent the motor coil from getting damp and short-circuiting or the blades from getting stuck due to dust accumulation, extend the service life of the equipment, and reduce the failure rate of the equipment caused by environmental exposure.

[0016] In a preferred embodiment, a duct is installed through the lower center of the fan, and a curved air chamber is fixedly connected to the lower end of the duct. Air outlets are spaced apart on the inner circumferential surface of the curved air chamber.

[0017] By adopting the above technical solution, a curved air chamber is installed below the fan and multiple air outlets are set up. The curved air chamber can guide the airflow to diffuse evenly, and the multiple air outlets can disperse the air pressure, reduce pipeline vibration, and extend the service life of the overall structure.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0019] In this application, a rotating rolling filter screen is installed in the coal conveying pipeline filtration structure, coupled with a top blower for cleaning. The purpose is to solve the problem of coal slag easily caking and being difficult to filter. This effectively addresses the filtration of sticky, wet coal slag. When the filter screen rotates, large coal slag particles are thrown to the periphery by centrifugal force. At this time, the directional, constant-speed airflow from the upper semi-circle of the blower breaks up the clumps of coal slag and filters out dust and particulate matter present in the coal mine, making the combustion of the coal more complete. The rotation of the rolling filter screen, combined with the airflow, also prevents coal slag from adhering and clogging the mesh, reducing the frequency of manual cleaning, thus extending equipment life and reducing fuel consumption. Simultaneously, a collection bin is installed at the lower end of the rolling filter screen, and a pneumatic pump is used to output particulate matter for coal slag recovery. The collection bin stores the filtered particulate matter by its own gravity. The pneumatic pump transports the coal slag through pipelines to the combustion zone for reuse. This prevents material accumulation and blockage in the bin, avoids pollution caused by open-air stockpiling, saves on the tedious process of manual slag cleaning, improves fuel utilization, and protects the working environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the device in this application;

[0021] Figure 2 This is a schematic diagram of the front-curved tube structure in this application;

[0022] Figure 3 This is a schematic diagram of the structure of the equipment protection compartment in this application;

[0023] Figure 4 This is a schematic diagram of the rolling filter structure in this application;

[0024] Figure 5This is a schematic diagram of the wind turbine structure in this application.

[0025] The markings in the diagram are: 1. Front pipe; 2. Flange; 3. Front curved pipe; 4. Collection bin; 5. Rear pipe; 6. Rear curved pipe; 7. Equipment protection bin; 8. Scroll filter; 9. Air pump; 10. Discharge pipe; 11. Connecting rod; 12. Air inlet screen; 13. Fixing block; 14. Motor; 15. Rotary gear; 16. Fan; 17. Gear; 18. Rear fixing ring; 19. Curved air chamber; 20. Air outlet; 21. Air duct. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0027] Reference Figure 1-5 A particle filtration and recovery device for a coal conveying pipeline in a power plant includes a front pipeline 1. A rolling filter screen 8 is installed on the inner circumferential surface of the front pipeline 1. A rear fixing ring 18 is fixedly connected to the rear end of the rolling filter screen 8. A gear 17 is provided on the outer circumferential surface of the rear fixing ring 18. A fan 16 is installed at the upper end of the outer circumferential surface of the front pipeline 1 relative to the rolling filter screen 8. A connecting rod 11 is connected along the circumference of the rear surface of the front pipeline 1. A rear pipeline 5 is fixedly connected to the rear end of the connecting rod 11. A motor 14 is installed on the outer circumferential surface of the rear pipeline 5 relative to the rear fixing ring 18. A rotating gear 15 is rotatably provided at the front end of the motor 14, and the rotating gear 15 meshes with the gear 17. The outer circumferential surface of the motor 14... A fixed block 13 is connected to the upper part of the outer circumference surface of the rear pipe 5 from the lower end of the surface. A rotating rolling filter screen is installed in the coal conveying pipeline filter structure and is purged by a top fan. The purpose is to solve the problem of coal slag being easy to clump and difficult to filter. It can effectively deal with the filtration problem of sticky and wet coal slag. When the filter screen rotates, large coal slag particles are thrown to the outside by centrifugal force. At this time, the directional and constant speed airflow of the upper half-circumference blown by the fan breaks up the clumped coal slag and filters the dust and particulate matter present in the coal mine, so that the coal combustion is more complete. The rotation of the rolling filter screen combined with the wind force can also prevent coal slag from sticking and causing the mesh to be blocked, reducing the frequency of manual cleaning, which can extend the equipment life and reduce fuel consumption.

[0028] A front curved pipe 3 is welded to the front end surface of the front pipe 1, and a flange 2 is installed at the front end of the front curved pipe 3. A rear curved pipe 6 is welded to the rear end edge of the rear pipe 5. Curved pipes are added at the front and rear ends of the filter device and connected by flanges. The design of the curved pipe can buffer the impact of coal flow input, avoid weld cracking caused by long-term vibration of straight pipe input, reduce the filter load, and the flange connection facilitates quick disassembly and assembly of equipment for maintenance or replacement of filter screen, prevents interface deformation and leakage, reduces the space occupation rate of the overall structure, and improves the system reliability.

[0029] A collection bin 4 is fixedly installed at the lower end of the front pipe 1. The collection bin is set at the lower end of the rolling filter screen to realize the recycling of coal slag. The collection bin collects the filtered particles by gravity, avoiding pollution caused by open-air stacking and saving the tedious process of manual slag removal.

[0030] A discharge pipe 10 is installed through the center of the lower surface of the collection bin 4. An air pump 9 is installed on the outer circumferential surface of the discharge pipe 10. The collection bin is set at the lower end of the rolling filter screen and the air pump is used to output particulate matter. The collection bin collects and stores the filtered particulate matter by its own gravity. The air pump transports the coal slag through the pipeline to the combustion zone for reuse. This can prevent the accumulation of material in the bin and blockage, improve fuel utilization and protect the safety of the working environment.

[0031] An equipment protection chamber 7 is installed on the upper part of the outer circumferential surface of the front pipe 1. An air inlet mesh 12 is provided on the upper surface of the equipment protection chamber 7 near the front edge. The equipment protection chamber on the top of the filter device can isolate the fan and motor from direct contact with the external environment. The protection chamber can block coal dust and moisture from entering the equipment, prevent the motor coil from getting damp and short-circuiting or the blades from getting stuck due to dust accumulation, extend the service life of the equipment, and reduce the failure rate of the equipment due to environmental exposure.

[0032] A duct 21 is installed through the center of the lower end of the fan 16. A curved air chamber 19 is fixedly connected to the lower end of the duct 21. Air outlets 20 are spaced apart on the inner circumferential surface of the curved air chamber 19. The curved air chamber is installed below the fan and multiple air outlets are provided. The curved air chamber can guide the airflow to diffuse evenly, and the multiple air outlets can disperse the air pressure, reduce pipe vibration, and extend the service life of the overall structure.

[0033] The implementation principle of the particle filtration and recovery device for coal conveying pipelines in power plants according to this application is as follows: In this application, a rotating rolling filter screen is installed in the coal conveying pipeline filtration structure and is combined with a top fan for blowing. The purpose is to solve the problem of coal slag being easy to clump and difficult to filter. It can effectively deal with the filtration problem of sticky and wet coal slag. When the filter screen rotates, large coal slag particles are thrown to the outside by centrifugal force. At this time, the directional and constant speed airflow of the upper semicircle blown by the fan disperses the clumped coal slag and filters the dust and particulate matter present in the coal mine, so that the coal combustion is more complete. The rotation of the rolling filter screen combined with the wind force can also prevent coal slag from adhering and causing the mesh to become blocked, reducing the frequency of manual cleaning, and achieving the effect of extending equipment life and reducing fuel consumption.

[0034] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A coal conveying pipeline particle filtering and recovering device for a power plant, comprising a front pipeline (1), characterized in that: The inner circumferential surface of the front pipeline (1) is provided with a rolling filter screen (8), the rear end of the rolling filter screen (8) is fixedly connected with a rear fixed ring (18), the outer circumferential surface of the rear fixed ring (18) is provided with a gear (17), the upper end of the outer circumferential surface of the front pipeline (1) is provided with a fan (16) relative to the position of the rolling filter screen (8), the rear surface of the front pipeline (1) is connected with a connecting rod (11) along the circumference, the rear end of the connecting rod (11) is fixedly connected with a rear pipeline (5), the outer circumferential surface of the rear pipeline (5) is provided with a motor (14) relative to the position of the rear fixed ring (18), the front end of the motor (14) is rotatably provided with a gear tooth (15), the gear tooth (15) and the gear (17) are engaged with each other, and the lower end of the outer circumferential surface of the motor (14) is connected with a fixed block (13) to the upper end of the outer circumferential surface of the rear pipeline (5).

2. A coal conveying pipeline particle filtering and recovering device for a power plant according to claim 1, characterized in that: The front end surface of the front pipeline (1) is welded with a front curved pipe (3), the front end of the front curved pipe (3) is provided with a flange (2), and the rear end edge of the rear pipeline (5) is welded with a rear curved pipe (6).

3. A coal conveying pipeline particle filtering and recovering device for a power plant according to claim 1, characterized in that: The lower end of the front pipeline (1) is fixedly provided with a collecting bin (4).

4. A coal conveying pipeline particle filtering and recovering device for a power plant according to claim 3, characterized in that: The lower surface of the collecting bin (4) is provided with a discharging pipe (10) penetratingly installed at the center position, and the outer circumferential surface of the discharging pipe (10) is provided with an air pump (9).

5. A coal conveying pipeline particle filtering and recovering device for a power plant according to claim 1, characterized in that: The upper end of the outer circumferential surface of the front pipeline (1) is provided with an equipment protection bin (7), and the upper surface of the equipment protection bin (7) is provided with an air inlet screen (12) near the front end edge.

6. A coal conveying pipeline particle filtration and recovery device for a power plant as recited in claim 1, characterized by: The lower end of the fan (16) is provided with a wind pipe (21) penetratingly installed at the center position, and the lower end of the wind pipe (21) is fixedly connected with a curved wind bin (19).

7. A coal conveying pipeline particle filtration and recovery apparatus for a power plant as claimed in claim 6 wherein: The inner circumferential surface of the curved wind bin (19) is provided with air outlets (20) at intervals.

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