Particle filter medium screening and cleaning machine

Abstract

This invention discloses a granular filter media screening and washing machine, comprising a frame on which a cylindrical first screen and a second screen are mounted. The first and second screens are coaxially arranged and internally connected. The first screen is connected to a feed pipe, and the second screen is connected to a discharge chute. A water tank is located below each of the first and second screens. A ring of nozzles is located inside the second screen. Material-propelling spiral blades are fixed inside both the first and second screens. The frame also has a drive assembly that drives the first and second screens to rotate. The first and second screens rotate within their respective water tanks, and the internal material-propelling spiral blades rotate synchronously. This invention is installed outside the filter tank, without occupying the effective height of the filter tank, and can significantly increase the filter layer height, improving the filtration and adsorption treatment effect. It has a good screening and removal effect on broken fine filter media, and can basically remove all of them.

Description

Technical Field

[0001] This invention belongs to the field of screening and cleaning equipment, and specifically relates to a screening and cleaning machine for granular filter media. Background Technology

[0002] In water treatment filtration processes, using solid particulate matter as filter media is a common practice. Common filter media include quartz sand, activated carbon, activated coke, and ceramsite. After a certain period of use, solid filter media will inevitably become clogged, leading to a decrease in treatment efficiency. Therefore, cleaning or replacement of the filter media is necessary. For bottom-inlet filtration systems, clogging occurs gradually from bottom to top. Therefore, a more thorough cleaning method is to lift the clogged filter media from the bottom to the top of the filter tank for cleaning. However, filter media breakage is inevitable during transport, and since the filtration process has specific requirements for the particle size of the filter media, it is necessary to minimize the transport path of the filter media.

[0003] Currently, the most commonly used types of filter beds, such as flowing sand filters and activated carbon filters, have an in-bed cleaning device installed inside the filter bed, as close as possible to the water surface. This means that the cleaning and sludge removal of the filter media are completed inside the bed.

[0004] This method still has drawbacks: First, the in-pool cleaning device occupies the effective height of the filter, especially for activated carbon filters. The treatment effect is closely related to the residence time of wastewater in the activated carbon layer; the longer the residence time, the better the treatment effect. Therefore, the effective height of the filter should be maximized. Second, during in-pool cleaning, fine filter media particles are carried away by the wastewater flow, leaving a significant amount of residue. Third, while maintaining the effective height of the filter, the cleaning device cannot be too large, meaning its processing capacity is limited. Fourth, each pneumatic conveying pipe point requires a cleaning device; if the filter is large, the number of devices required will be numerous. Summary of the Invention

[0005] The purpose of this invention is to provide a granular filter media screening and cleaning machine that can be installed on the top of a filter bed to screen and clean the filter media.

[0006] Therefore, the technical solution of the present invention is: a granular filter media screening and washing machine, characterized in that: it includes a frame, on which a cylindrical first screen and a second screen are mounted, the first screen and the second screen are coaxially arranged and internally connected, the first screen is connected to a feed pipe, and the second screen is connected to a discharge chute; a water tank is provided below the first screen and the second screen, and the lower parts of the first screen and the second screen are placed in the water tank; a ring of nozzles is provided inside the second screen; material propulsion spiral blades are fixed inside the first screen and the second screen, and a drive assembly is also provided on the frame to drive the first screen and the second screen to roll, the first screen and the second screen roll in their respective water tanks, and the material propulsion spiral blades inside rotate synchronously.

[0007] Preferably, a first material-propelling spiral blade is fixed inside the first screen, and a second material-propelling spiral blade is fixed inside the second screen, wherein the pitch of the second material-propelling spiral blade is greater than that of the first material-propelling spiral blade.

[0008] Preferably, a plurality of lifting plates are fixed on the material propulsion spiral blade. The lifting plates are plate-shaped structures and are evenly inserted on the circumference of the material propulsion spiral blade.

[0009] Preferably, a first water tank is provided below the first screen, and a second water tank is provided below the second screen. The first water tank and the second water tank are connected, and the second water tank is higher than the first water tank.

[0010] Preferably, the first water tank is provided with a drain outlet.

[0011] Preferably, the nozzle inside the second screen is connected to the spray inlet pipe outside the second screen.

[0012] Preferably, the drive assembly includes a motor mounted on a frame, the motor being located on the side of the first screen, a drive gear fixed on the motor, a driven gear being provided on the side of the first screen, and the drive gear meshing with the driven gear; one end of the first screen is provided with a first rolling ring, and the other end is connected to the second screen through a second rolling ring; the frame is provided with two sets of support rollers, and the first screen and the second screen are mounted on the support rollers of the frame through the rolling rings.

[0013] The screening and cleaning section consists of a feed pipe, a drum-shaped first screen, a first material-propelling spiral, and a first water tank. This section performs both screening and cleaning functions, removing excessively fine filter media and contaminants trapped within them. The lower part of the first screen is submerged in the first water tank. After entering through the feed pipe, the material is continuously propelled by the first material-propelling spiral. Simultaneously, the first screen rotates continuously in the water, constantly cleaning the filter media. The lifting plates on the first material-propelling spiral enhance the screening and cleaning effect. The material within the first screen is pushed into the second screen by the spiral.

[0014] The cleaning section consists of a drum-shaped second screen, a second material-propelling spiral blade, a second material-disturbing lifting plate, a second water tank, a discharge chute, and a spray inlet pipe. The cleaning section uses the supernatant from the filter tank to clean the wastewater brought from the screening section from the filter media. The second screen contains a second material-propelling spiral blade with a larger pitch and faster propulsion speed. After the material enters the second screen, it is continued to be propelled forward by the second material-propelling spiral blade, while a large amount of clean water is continuously sprayed from the nozzles to clean the filter media. The cleaned filter media falls back into the filter tank through the discharge chute for continued use. The wastewater generated during cleaning is collected in the second water tank and flows into the first water tank, serving as washing water for the screening and cleaning section.

[0015] The beneficial effects of this invention are as follows:

[0016] 1) Installed outside the filter bed, it does not occupy the effective height of the filter bed, and can significantly increase the height of the filter layer, thereby improving the filtration and adsorption treatment effect;

[0017] 2) It has a good effect on screening and removing crushed fine filter media, and can basically remove them all;

[0018] 3) An adjustable speed motor is used, so the screening speed can be adjusted and the screening and cleaning effect can be controlled;

[0019] 4) If it is necessary to increase the screening and washing capacity, the equipment can be extended based on this structure;

[0020] 5) For larger filter tanks with more material lifting points, the equipment can be installed on a mobile bridge mechanism for mobile use, thereby reducing the number of cleaning devices required and greatly reducing equipment investment. Attached Figure Description

[0021] The following detailed description, in conjunction with the accompanying drawings and embodiments of the present invention, will provide further information.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a partial cross-sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram illustrating the application of the present invention.

[0025] The components in the diagram are labeled as follows: 1. Frame; 2. Support roller; 3. First screen; 4. Second screen; 5. First roller ring; 6. Second roller ring; 7. Motor; 8. Drive gear; 9. Driven gear; 10. Feed pipe; 11. Discharge chute; 12. First material propulsion spiral blade; 13. First lifting plate; 14. Second material propulsion spiral blade; 15. Second lifting plate; 16. First water tank; 17. Drain outlet; 18. Second water tank; 19. Nozzle; 20. Spray water inlet pipe; 21. Filter tank; 22. Pneumatic conveying device. Detailed Implementation

[0026] See the attached drawings. The granular filter material screening and washing machine described in this embodiment includes a frame 1, on which two sets of rollers 2 are provided. The first screen 3 and the second screen 4 are roller-shaped structures with the circumferential surface being the screening section. The first screen 3 and the second screen 4 are coaxially arranged. The right end of the first screen 3 is provided with a first rolling ring 5, and the left end is connected to the second screen 4 through a second rolling ring 6. The two screens are internally connected. The first screen 3 and the second screen 4 are mounted on the rollers 2 of the frame 1 through the rolling rings. A motor 7 is also installed on the frame 1. The motor 7 is located to the right of the first screen 3. A drive gear 8 is fixed on the motor 7. A driven gear 9 that meshes with the drive gear 8 is fixed to the right side of the first screen 3. The driven gear 9 is coaxially arranged with the first rolling ring 5. The motor 7 drives the first screen 3 and the second screen 4 to roll through the meshing drive gear 8 and driven gear 9. The first rolling ring 5 and the second rolling ring 6 cooperate with the rollers 2, so that the first screen 3 and the second screen 4 can roll on the frame 1.

[0027] The right end of the first screen 3 is connected to the feed pipe 10, and the left end of the second screen 4 is connected to the downward-sloping discharge chute 11. The filter material enters from the feed pipe 10, passes through the first screen 3 and the second screen 4 in sequence, and is discharged from the discharge chute 11. The first screen 3 has a first material propulsion spiral blade 12 fixed inside, which drives the first material propulsion spiral blade 12 to rotate together. Multiple first lifting plates 13 are fixed on the first material propulsion spiral blade 12. The first lifting plates 13 are plate-shaped structures and are evenly inserted on the circumference of the first material propulsion spiral blade 12. The first lifting plates 13 are parallel to the axis of the first material propulsion spiral blade 12.

[0028] The second screen 4 has a fixed second material-propelling spiral blade 14. The pitch of the second material-propelling spiral blade 14 is greater than that of the first material-propelling spiral blade 12, resulting in a faster propulsion speed for the filter media. The second screen 4 also has a fixed second material-propelling spiral blade 14, which rotates together with the second material-propelling spiral blade 14. Multiple second lifting plates 15 are fixed on the second material-propelling spiral blade 14. The second lifting plates 15 are plate-shaped and are evenly inserted on the circumference of the second material-propelling spiral blade 14. The second lifting plates 15 are parallel to the axis of the second material-propelling spiral blade 14.

[0029] A first water tank 16 is located below the first screen 3, and a drain outlet 17 is provided on the first water tank 16. The water in the first water tank 16 is used to remove excessively fine filter media and pollutants trapped by the filter media, and the wastewater can be discharged from the drain outlet 17. A second water tank 18 is located below the second screen 4, and the first water tank 16 is connected to the second water tank 18, with the second water tank 18 being higher than the first water tank 16. A ring of nozzles 19 is provided on the inner wall of the second screen 4, and the nozzles 19 are connected to a spray inlet pipe 20 on the outside of the second screen 4. The spray inlet pipe 20 can be connected to the supernatant of the filter tank 21. The nozzles 19 continuously spray a large amount of clean water to clean the filter media. The wastewater generated from the cleaning is collected by the second water tank 18 and flows into the first water tank 16 as washing water for the screening and cleaning section.

[0030] The granular filter media screening and washing machine is divided into two parts: a screening and washing section and a washing section. The screening and washing section consists of a feed pipe 10, a drum-shaped first screen 3, a first material propulsion spiral blade 12, a first lifting plate 13, and a first water tank 16. The washing section consists of a drum-shaped second screen 4, a second material propulsion spiral blade 14, a second lifting plate 15, a second water tank 18, a discharge chute 11, and a spray water inlet pipe 20. To increase the screening and washing capacity, the number of screening and washing sections or washing sections can be increased based on this structure.

[0031] During operation, the granular filter media screening and washing machine described in this embodiment is placed outside the filter tank 21. The filter tank 21 is equipped with a pneumatic conveying device 22, which continuously conveys the bottom filter media to the top of the pipe. The discharge pipe of the pneumatic conveying device 22 is connected to the feed pipe 10 of the granular filter media screening and washing machine. The filter media to be cleaned and screened enters the first screen 3 through the feed pipe 10. The lower part of the first screen 3 is immersed in the first water tank 16. The motor 7 drives the first screen 3 to roll in the first water tank 16. After the filter media enters, it is continuously pushed by the first material pushing spiral blade 12. At the same time, the first screen 3 rotates continuously in the water, so that the filter media is continuously cleaned in the water. The first lifting plate 13 on the first material pushing spiral blade 12 enhances the screening and cleaning effect. The filter media in the first screen 3 is pushed into the second screen 4 by the first material pushing spiral blade 12.

[0032] The second screen 4 rotates synchronously with the first screen 3, while the second material-propelling spiral vane 14 has a larger pitch and a faster propulsion speed. After the material enters the second screen 4, it continues to be propelled forward by the second material-propelling spiral vane 14. At the same time, the nozzle 19 continuously sprays a large amount of clean water to clean the filter media. The cleaned filter media falls back into the filter tank 21 through the discharge chute 11 for continued use. The wastewater generated during cleaning is collected by the second water tank 18 and flows into the first water tank 16 as washing water for the screening and cleaning section.

Claims

1. A granular filter media screening and washing machine, comprising a frame, on which a cylindrical first screen and a second screen are mounted, and a drive assembly for rotating the first screen and the second screen, wherein the first screen and the second screen are coaxially arranged and internally connected, characterized in that: The frame is placed outside the filter tank; The first screen is connected to the feed pipe, and the second screen is connected to the discharge chute. The filter material enters from the feed pipe, passes through the first screen and the second screen in sequence, and is discharged from the discharge chute. The second screen has a ring of nozzles inside, and the nozzles are connected to the spray water inlet pipe outside the second screen; The feed pipe is connected to the discharge pipe of the pneumatic conveying device located inside the filter tank, while the spray water inlet pipe is connected to the supernatant of the filter tank. A first material-propelling spiral blade is fixed inside the first screen, and a second material-propelling spiral blade is fixed inside the second screen. A first water tank is provided below the first screen, and a second water tank is provided below the second screen. The lower parts of the first screen and the second screen are respectively placed in the first water tank and the second water tank, thereby forming a screening and cleaning section consisting of a feed pipe, a first screen, a first material-propelling spiral blade and a first water tank, and a cleaning section consisting of a second screen, a second material-propelling spiral blade, a second water tank, a discharge chute and a spray water inlet pipe. The first water tank is connected to the second water tank, and the second water tank is higher than the first water tank, so that the wastewater generated during washing is collected in the second water tank and flows into the first water tank, which is used as washing water for the screening and washing section. The first and second screens roll within their respective water tanks, while the first and second material-propelling spiral blades inside rotate synchronously.

2. The granular filter media screening and washing machine as described in claim 1, characterized in that: The pitch of the second material propulsion spiral is greater than that of the first material propulsion spiral.

3. The granular filter media screening and washing machine as described in claim 1, characterized in that: The first material propulsion spiral blade has multiple first lifting plates fixed on it. The first lifting plates are sheet-like structures and are evenly inserted on the circumference of the first material propulsion spiral blade. The second material propulsion spiral blade has multiple second lifting plates fixed on it. The second lifting plates are sheet-like structures and are evenly inserted on the circumference of the second material propulsion spiral blade.

4. The granular filter media screening and washing machine as described in claim 1, characterized in that: The first water tank is equipped with a drain outlet.

5. The granular filter media screening and washing machine as described in claim 1, characterized in that: The drive assembly includes a motor mounted on a frame, the motor being located on the side of the first screen, a drive gear fixed on the motor, and a driven gear on the side of the first screen, the drive gear meshing with the driven gear; one end of the first screen is provided with a first rolling ring, and the other end is connected to the second screen through a second rolling ring; the frame is provided with two sets of support rollers, and the first screen and the second screen are mounted on the support rollers of the frame through the rolling rings.

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