Staged purification dry-type filtration dust removal system

Abstract

The invention discloses a grading purification dry type filtering dust removal system which comprises a main control box and a dust discharging belt, a dust collecting bin is arranged at the tail end of the dust discharging belt, and a dust discharging device in transmission connection with the dust discharging belt is connected to the dust collecting bin. A first-stage primary dust removal module, a second-stage medium-efficiency dust removal module, a third-stage high-efficiency dust removal module and a spraying module are sequentially arranged above the dust discharging belt; a gravity dust discharging plate provided with a gravity sensor is mounted below the first-stage primary dust removal module and the second-stage medium-efficiency dust removal module; the first-stage primary dust removal module comprises a filter screen and a back-blowing dust removal device; the second-stage medium-efficiency dust removal module comprises a filter plate and a pulse dust removal device, a drainage plate is arranged in the filter plate, small ventilation holes are formed in the surface of the drainage plate, and a reverse blowing device connected with the pulse dust removal device is mounted in the drainage plate; and the third-stage efficient dust removal module comprises a filter cartridge and a spherical intelligent pulse dust removal device. The concentration of dust in airflow can be greatly reduced, the dust removal efficiency, the dust cleaning and discharging efficiency are improved, and the service life of filtering equipment is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial dust removal, and particularly relates to a hierarchical purification dry filtration dust removal system. Background Art

[0002] In the production activities of industrial and mining enterprises, a large amount of dust will enter the air during the production process, seriously affecting air quality. High-concentration dust not only endangers the physical health of workers, causing occupational health problems such as respiratory diseases, but also may damage production equipment, shorten the service life of the equipment, increase maintenance costs, and even affect the normal progress of production. Traditional dust removal equipment often has problems such as low dust removal efficiency, incomplete ash cleaning, and difficult ash discharging. A single dust removal method is difficult to cope with the complex working conditions of dust with different particle sizes, resulting in excessive dust emissions. Moreover, if the ash cleaning process is not efficient enough, dust will continuously accumulate on the outer surface of the filter component, increasing the filtration resistance and affecting the overall performance of the dust removal equipment. If the ash discharging link is not reasonably designed, it is easy to cause dust leakage, pollute the environment again, and increase the workload and labor intensity of manual cleaning. Summary of the Invention

[0003] The purpose of the present invention is to provide a hierarchical purification dry filtration dust removal system, which can greatly reduce the dust concentration in the air flow, improve the dust removal efficiency, ash cleaning and discharging efficiency, and the service life of the filtration equipment.

[0004] To achieve the above purpose, the present invention provides a hierarchical purification dry filtration dust removal system, including a main control box and a dust discharging belt. A dust collecting bin is provided at the end of the dust discharging belt, and a dust discharging device connected to the dust discharging belt in a transmission manner is connected to the dust collecting bin. An air inlet is connected to the front end of the first-stage primary dust removal module, and an air outlet is connected to the rear end of the spraying module. An ash discharging plate equipped with a gravity sensor is installed below the first-stage primary dust removal module and the second-stage intermediate dust removal module.

[0005] The first-stage primary dust removal module includes a filter screen and a reverse blowing ash cleaning device provided behind the filter screen.

[0006] The second-stage intermediate dust removal module includes a filter plate and a pulse ash cleaning device. A drainage plate is provided inside the filter plate, and dense ventilation holes are provided on the surface of the drainage plate. A reverse spraying device connected to the pulse ash cleaning device is installed inside the drainage plate.

[0007] The third-stage high-efficiency dust removal module includes a filter cartridge and a spherical intelligent pulse ash cleaning device for cleaning the filter cartridge.

[0008] The pore diameters on the filter screen, filter plate, and filter cartridge decrease in sequence.

[0009]

[0010] ​The main control box is connected to control the ash discharge belt, gravity ash discharge plate, reverse blowing and cleaning device, pulse cleaning device, spherical intelligent pulse cleaning device, and spraying module.

[0011] As a further solution of the present invention: There is a gap between the drainage plate and the filter plate; the reverse blowing device is provided with an internal nozzle, and the surface is provided with blowing air holes. The internal nozzle is connected to the pulse cleaning device through a blowing pipeline.

[0012] As a further solution of the present invention: The spherical pulse cleaning device includes a control valve and an air bag connected thereto. A number of horizontally arranged air guiding rods are connected to the control valve, and a number of vertically arranged telescopic rods are connected to the air guiding rods. The end of the telescopic rod is connected to a spherical blowing head, and blowing small holes are provided on the spherical blowing head.

[0013] As a further solution of the present invention: The spraying module is internally provided with a spraying device, and the spraying device includes a support rod and a nozzle installed on the support rod capable of spraying dust binder.

[0014] As a further solution of the present invention: The ash discharge device includes a roller and a number of scraping plates. The scraping plates are evenly spaced on the roller, and the adjacent scraping plates are in a V-shaped structure. The end of the roller is connected to the ash discharge belt through a gear assembly, and the roller rotates in the same direction as the ash discharge belt.

[0015] As a further solution of the present invention: The scraping plate is made of a flexible material, and the end of the scraping plate away from the roller fits the surface of the ash discharge belt.

[0016] As a further solution of the present invention: The secondary medium-efficiency dust removal module and the tertiary high-efficiency dust removal module are separated by a partition for the airflow to pass through.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] Through the coordinated operation of the cascade dust removal and cleaning and ash discharge system, first use the primary pre-filter dust removal module to remove large-particle dust, then use the secondary medium-efficiency dust removal module to remove medium-particle dust, and finally use the tertiary high-efficiency dust removal module to remove small-particle dust. This not only effectively reduces the dust load of the tertiary high-efficiency dust removal module and increases its service life, but also the whole system can effectively improve the filtration and purification, cleaning, and ash discharge efficiency, realizing production safety and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shows the structural schematic diagram of the present invention;

[0020] Figure 2 Shows the three-dimensional schematic diagram of the drainage plate and the internal reverse blowing device of the present invention;

[0021] Figure 3Shows a top view of the installation method and position of the drainage plate and reverse jetting device of the present invention inside the filter plate;

[0022] Figure 4 Shows a schematic plan view of the installation of the drainage plate and reverse jetting device of the present invention inside the filter plate;

[0023] Figure 5 Shows a schematic connection diagram of the reverse jetting device inside the drainage plate of the present invention;

[0024] Figure 6 Shows a three-dimensional schematic diagram of the spherical intelligent pulse dust cleaning device of the present invention;

[0025] Figure 7 Shows a working schematic diagram when the telescopic rod of the present invention controls the spherical jetting head to extend to the bottom of the filter cartridge;

[0026] Figure 8 Shows a schematic diagram of the telescopic working process of the telescopic rod of the present invention inside the filter cartridge;

[0027] Figure 9 Shows a three-dimensional schematic diagram of the spray module of the present invention;

[0028] Figure 10 Shows a three-dimensional schematic diagram of the overall ash discharging system of the present invention;

[0029] Figure 11 Shows a structural schematic diagram of the ash discharging device of the present invention;

[0030] In the figure: 1. Primary low-efficiency dust removal module, 2. Secondary medium-efficiency dust removal module, 3. Tertiary high-efficiency dust removal module, 4. Spray module, 5. Ash discharging belt, 6. Filter screen, 7. Reverse blowing dust cleaning device, 8. Filter plate, 81. Drainage plate, 811. Ventilation small holes, 82. Reverse jetting device, 821. Jetting air holes, 822. Built-in nozzle, 823. Jetting pipeline, 9. Pulse dust cleaning device, 10. Filter cartridge, 11. Spray device, 111. Nozzle, 112. Support rod, 12. Spherical intelligent pulse dust cleaning device, 121. Spherical jetting head, 1211. Jetting small holes, 122. Control valve, 123. Telescopic rod, 124. Air bag, 125. Air guiding rod, 13. Ash collection bin, 14. Gear assembly, 15. Main control box, 16. Partition board, 17. Ash discharging device, 171. Roller, 172. Scraper, 18. Air inlet, 19. Air outlet, 20. Gravity ash discharging plate. Detailed implementation manners

[0031] The present invention will be further described below through embodiments.

[0032] Such as Figure 1 , Figure 2 And Figure 11As shown in the figure, a hierarchical purification dry filtering and dust removal system includes a main control box 15 and a dust discharging belt 5. A dust collecting bin 13 is provided at the end of the dust discharging belt 5. A dust discharging device 17 which is in transmission connection with the dust discharging belt 5 is connected to the dust collecting bin 13. Above the dust discharging belt 5, a primary low-efficiency dust removal module 1, a secondary medium-efficiency dust removal module 2, a tertiary high-efficiency dust removal module 3, and a spraying module 4 are arranged in sequence along the conveying direction of the dust discharging belt 5. An air inlet 18 is connected to the front end of the primary low-efficiency dust removal module 1, and an air outlet 19 is connected to the rear end of the spraying module 4;

[0033] A gravity dust discharging plate 20 equipped with a gravity sensor is installed below the primary low-efficiency dust removal module 1 and the secondary medium-efficiency dust removal module 2. Through real-time monitoring by the gravity sensor, when the gravity reaches a certain value, downward dust discharging is carried out for centralized cleaning;

[0034] The primary low-efficiency dust removal module 1 includes a filter screen 6 and a reverse blowing and dust cleaning device 7 arranged behind the filter screen 6. The reverse blowing and dust cleaning device 7 forms a 45° angle with the filter screen 6, which is beneficial for the reverse blowing air flow to more effectively wash the surface of the filter screen 6, regularly clean the dust particles accumulated on the filter screen 6, and ensure the air permeability and filtering performance of the filter screen 6;

[0035] The secondary medium-efficiency dust removal module 2 includes a filter plate 8 and a pulse dust cleaning device 9. A diversion plate 81 is arranged inside the filter plate 8. Dense ventilation holes 811 are arranged on the surface of the diversion plate 81. A reverse spraying device 82 connected to the pulse dust cleaning device 9 is installed inside the diversion plate 81; A part of the air flow of the pulse dust cleaning device 9 directly enters the inside of the filter plate 8, and a part passes through the reverse spraying device 82 and sprays out from the inside of the diversion plate 81 through the ventilation holes 811, which can change the pulse air flow entering the filter plate 8, so as to achieve the purpose of dust cleaning;

[0036] The tertiary high-efficiency dust removal module 3 includes a filter cartridge 10 and a spherical intelligent pulse dust cleaning device 12 for cleaning the filter cartridge 10; The spherical intelligent pulse dust cleaning device 12 also has the function of cleaning the filter cartridge 10. Combining the pulse dust cleaning device of the secondary medium-efficiency dust removal module 2 and the reverse blowing and dust cleaning device 7 of the primary low-efficiency dust removal module 1 enables the filter screen 6, filter plate 8, and filter cartridge 10 in the system to maintain good filtering efficiency and extend their service life;

[0037] The pore diameters on the filter screen 6, filter plate 8, and filter cartridge 10 decrease in sequence; It can achieve step-by-step filtering and dust cleaning, classify and process dust, and relieve the dust load on the filter screen 6, filter plate 8, and filter cartridge 10;

[0038] The main control box 15 is installed on the outer wall of the spraying module 4. The main control box 15 is connected to control the dust discharging belt 5, gravity dust discharging plate 20, reverse blowing and dust cleaning device 7, pulse dust cleaning device 9, spherical intelligent pulse dust cleaning device 12, and spraying module 4.

[0039] In order to improve the dust cleaning effect on the filter plate 8, further, as Figures 2 to 5As shown in the figure, there is a gap between the drainage plate 81 and the filter plate 8 to facilitate the flow of air. The reverse jetting device 82 is provided with an internal nozzle 822 and jetting holes 821 on its surface. The internal nozzle 822 is connected to the pulse dust cleaning device 9 through a jetting pipeline 823. The pulse gas port of the pulse dust cleaning device 9 is rectangular to facilitate the entry of pulse air flow into the interior of the filter plate 8. When the reverse jetting device 82 starts to work, gas enters the device through the jetting pipeline 823, and the air flow enters the interior of the filter plate 8 through the jetting holes 821 and the ventilation small holes 811. At the same time, the air flow trajectory of the pulse jetting of the pulse dust cleaning device 9 is changed, so as to achieve the purpose of dust cleaning.

[0040] In order to improve the dust cleaning effect on the filter cartridge 10, further, as Figures 6 to 8 shown, the spherical pulse dust cleaning device includes a control valve 122 and an air bag 124 connected thereto. A number of horizontally arranged air guiding rods 125 are connected to the control valve 122, and a number of vertically arranged telescopic rods 123 are connected to the air guiding rods 125. The end of the telescopic rod 123 is connected to a spherical jetting head 121, and jetting small holes 1211 are provided on the spherical jetting head 121. The telescopic rod 123 controls the spherical jetting head 121 to reciprocate up and down in the filter cartridge 10, which can clean the whole filter cartridge 10. At the same time, the interval skip sequence dust cleaning mode of multiple rows of filter cartridges 10 is adjusted and controlled through the main control box 15. By the interval skip sequence dust cleaning mode, the mutual influence between adjacent two rows of filter cartridges 10 during dust cleaning can be avoided, and the dust cleaning effect and efficiency of the filter cartridge 10 are improved.

[0041] In order to facilitate the centralized treatment of the intercepted and filtered dust, further, as Figure 9 shown, a spraying device 11 is provided inside the spraying module 4. The spraying device 11 includes a support rod 112 and a nozzle 111 installed on the support rod 112 and capable of spraying dust binder. When the ash unloading belt 5 with dust particles passes by, the nozzle 111 will spray a spray with dust binder to bond the dust particles into a mass, which is convenient for subsequent ash unloading treatment, reduces the flying of dust during ash unloading, and reduces the risk of secondary dust emission.

[0042] Further, as Figure 10 and Figure 11 shown, the ash unloading device 17 includes a roller 171 and a number of scraping plates 172. The scraping plates 172 are evenly spaced on the roller 171, and the adjacent scraping plates 172 are in a V-shaped structure. The end of the roller 171 is drivingly connected to the ash unloading belt 5 through a gear assembly 14, and the roller 171 rotates in the same direction as the ash unloading belt 5. A number of ash unloading cavities formed by a number of scraping plates 172 can smoothly collect the massed dust on the ash unloading belt 5 into the ash bin 13.

[0043] To prevent the agglomerated dust from adhering to the ash discharge belt 5 and affecting the transportation effect of the ash discharge belt 5, further, the scraper 172 is made of a flexible material, and the end of the scraper 172 away from the roller 171 fits the surface of the ash discharge belt 5. It can clean the agglomerated dust loaded on the ash discharge belt 5, and the flexible material scraper 172 can also improve the service life of both the ash discharge belt 5 and the scraper 172 itself, reducing equipment wear and replacement frequency.

[0044] Further, as Figure 1 shown, a partition 16 through which air flows is provided between the secondary medium efficiency dust removal module 2 and the tertiary high efficiency dust removal module 3. It can effectively optimize the air flow trajectory in the system, ensure the orderly progress of the dust removal process, and improve the overall dust removal efficiency.

[0045] When the present invention is specifically implemented: the dust-containing air flow first enters the primary low efficiency dust removal module 1; the dust particles with larger particle sizes are intercepted by the filter screen 6. As the dust gradually accumulates on the filter screen 6, the reverse blowing and cleaning device 7 starts the reverse blowing operation according to the set time interval or the degree of dust accumulation. The reverse blowing air flow blows towards the filter screen 6 at an angle of 45°, blowing off the accumulated dust particles, which fall onto the gravity ash discharge plate 20 below, realizing primary dust removal and preliminary cleaning.

[0046] The air flow after primary low efficiency dust removal enters the secondary medium efficiency dust removal module 2. The air flow is filtered through the filter plate 8, and the pulse cleaning device 9 periodically sprays pulse air flow into the filter plate 8. The pulse air ports adopt a rectangular structure, and the pulse air flow can quickly and evenly enter the filter plate 8. At the same time, the reverse blowing device 82 starts inside the diversion plate 81, and the built-in nozzle 822 sprays reverse air flow to change the trajectory of the pulse air flow, so that the cleaning air flow can more fully contact each part of the filter plate 8, removing the dust particles attached to the filter plate 8. The dust particles also fall on the gravity ash discharge plate 20. When the dust particles on the gravity ash discharge plate 20 reach the preset value monitored by the gravity sensor, the gravity ash discharge plate 20 centrally discharges the dust particles onto the ash discharge belt 5.

[0047] Then, the air flow after secondary dust removal enters the tertiary high efficiency dust removal module 3. The filter cartridge 10 further filters the fine dust in the air flow, and the spherical intelligent pulse cleaning device 12 starts to work under the control of the main control box 15. The control valve 122 controls the telescopic rod 123 to drive the spherical blowing head 121 to move up and down in the filter cartridge 10 according to the preset cleaning sequence. The blowing holes 1211 on the surface of the spherical blowing head 121 spray the high-pressure cleaning air flow in the air bag 124 in all directions, removing the dust particles on the filter cartridge 10, and the dust particles also fall into the ash discharge belt 5.

[0048] During the process of the dust unloading belt 5 transporting dust, the nozzles 111 of the spray module 4 start to work. When the dust unloading belt 5 passes below the nozzles 111, the nozzles 111 spray a mist containing dust binder, binding the dust particles on the dust unloading belt 5 into clusters. The dust unloading belt 5 continues to run to the end, and the gear assembly drives the roller 171 of the dust unloading device 17 to rotate, causing the scraper 172 and the dust unloading belt 5 to rotate clockwise, so that the contact point between the scraper 172 and the dust unloading belt 5 is in the reverse direction. The scraper 172 can scrape the bound dust particles into the dust collection bin 13, thus completing the dust unloading process.

Claims

1. A hierarchical purification dry filtering and dust removal system, comprising a main control box (15) and a dust discharging belt (5), wherein a dust collecting bin (13) is provided at the end of the dust discharging belt (5), and is characterized in that, A dust collection bin (13) is connected with a dust discharging device (17) which is drivingly connected with a dust discharging belt (5). Above the dust discharging belt (5), a primary low-efficiency dust removal module (1), a secondary medium-efficiency dust removal module (2), a tertiary high-efficiency dust removal module (3), and a spraying module (4) are sequentially arranged along the conveying direction of the dust discharging belt (5). An air inlet (18) is connected to the front end of the primary low-efficiency dust removal module (1), and an air outlet (19) is connected to the rear end of the spraying module (4). Below the primary low-efficiency dust removal module (1) and the secondary medium-efficiency dust removal module (2), a gravity dust discharging plate (20) equipped with a gravity sensor is installed. The primary low-efficiency dust removal module (1) includes a filter screen (6) and a back-blowing and dust cleaning device (7) arranged behind the filter screen (6). The secondary medium-efficiency dust removal module (2) includes a filter plate (8) and a pulse dust cleaning device (9). A diversion plate (81) is arranged inside the filter plate (8). Dense ventilation holes (811) are arranged on the surface of the diversion plate (81). A reverse spraying device (82) connected with the pulse dust cleaning device (9) is installed inside the diversion plate (81). The tertiary high-efficiency dust removal module (3) includes a filter cartridge (10) and a spherical intelligent pulse dust cleaning device (12) for cleaning the filter cartridge (10). The pore diameters on the filter screen (6), the filter plate (8), and the filter cartridge (10) decrease in sequence. The main control box (15) is connected to control the dust discharging belt (5), the gravity dust discharging plate (20), the back-blowing and dust cleaning device (7), the pulse dust cleaning device (9), the spherical intelligent pulse dust cleaning device (12), and the spraying module (4).

2. The hierarchical purification dry filtering and dust removal system according to claim 1, wherein A gap is left between the diversion plate (81) and the filter plate (8). The reverse spraying device (82) is provided with an internal nozzle (822) and spraying air holes (821) on the surface. The internal nozzle (822) is connected with the pulse dust cleaning device (9) through a spraying pipeline (823).

3. The hierarchical purification dry filtering and dust removal system according to claim 1 or 2, characterized in that The spherical pulse dust cleaning device includes a control valve (122) and an air bag (124) connected thereto. A plurality of horizontally arranged air guiding rods (125) are connected to the control valve (122). A plurality of vertically arranged telescopic rods (123) are connected to the air guiding rods (125). A spherical spraying head (121) is connected to the end of the telescopic rod (123). Spraying holes (1211) are arranged on the spherical spraying head (121).

4. The hierarchical purification dry filtering and dust removal system according to claim 3, characterized in that, A spraying device (11) is arranged inside the spraying module (4). The spraying device (11) includes a support rod (112) and nozzles (111) installed on the support rod (112) and capable of spraying a dust binder.

5. The hierarchical purification dry filtering and dust removal system according to claim 3, characterized in that, The dust discharging device (17) includes a roller (171) and a plurality of scraping plates (172). The scraping plates (172) are evenly spaced on the roller (171). The adjacent scraping plates (172) form a V-shaped structure. The end of the roller (171) is drivingly connected with the dust discharging belt (5) through a gear assembly (14). The roller (171) rotates in the same direction as the dust discharging belt (5).

6. The hierarchical purification dry filtering and dust removal system according to claim 5, wherein, The scraping plate (172) is made of a flexible material. The end of the scraping plate (172) far from the roller (171) is attached to the surface of the dust discharging belt (5).

7. The hierarchical purification dry filtering and dust removal system according to claim 3, characterized in that, The secondary medium-efficiency dust removal module (2) and the tertiary high-efficiency dust removal module (3) are separated by a partition plate (16) through which air can flow.

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