Filtering device for landfill leachate

Abstract

The utility model discloses a filter device for landfill leachate, which comprises a filter box, a filter screen cylinder arranged in the filter box, a cleaning shaft arranged in the filter box through a bearing, a motor matched with the cleaning shaft, a connecting rod arranged on the cleaning shaft, and a cleaning brush arranged at the tail end of the connecting rod. The outer end of the cleaning brush is attached to the inner wall of the filter screen cylinder, the bottom end of the filter box is provided with a first blow-off pipe matched with the filter screen cylinder, the side wall of the filter box is provided with a first liquid discharge pipe, the top end of the filter box is provided with a first liquid inlet pipe, the cleaning shaft is provided with spiral guide vanes, and the top end of the interior of the filter box is provided with an annular spraying pipe. The annular spraying pipe extends to the outer side of the filtering box and is provided with a solvent input pipe, and the filtering effect of percolate and the automatic cleaning effect of equipment in the filtering process can be improved.

Description

Technical Field

[0001] This utility model relates to the field of landfill leachate filtration technology, and more specifically, to a landfill leachate filtration device. Background Technology

[0002] Landfill leachate contains a high concentration of suspended solids (SS) and colloidal substances. During the purification process of landfill leachate, it is necessary to filter the leachate to remove the high concentration of suspended solids (SS) and colloidal substances, so as to avoid clogging of the membrane separation system or biochemical treatment unit during subsequent leachate purification treatment.

[0003] However, existing landfill leachate filtration devices mainly filter suspended impurities and solid particulate matter in landfill leachate through filter screen structures. After a period of use, they need to be shut down for cleaning, which affects filtration efficiency.

[0004] Existing landfill leachate filtration devices are not conducive to self-cleaning after filtration, which affects the filtration effect. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a filtration device for landfill leachate, so as to solve the technical problem mentioned in the background art that the existing landfill leachate filtration device is not convenient to achieve autonomous cleaning of the equipment during the leachate process.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A filtration device for landfill leachate includes a filter box, a filter screen cylinder inside the filter box, a cleaning shaft mounted inside the filter box via a bearing, and a motor mounted in conjunction with the cleaning shaft. A connecting rod is mounted on the cleaning shaft, and a cleaning brush is mounted at the end of the connecting rod. The outer end of the cleaning brush is in contact with the inner wall of the filter screen cylinder. A first drain pipe is mounted at the bottom of the filter box in conjunction with the filter screen cylinder. A first liquid drain pipe is mounted on the side wall of the filter box. A first liquid inlet pipe is mounted at the top of the filter box. Spiral guide vanes are mounted on the cleaning shaft. An annular spray pipe is mounted at the top of the interior of the filter box, extending to the outside of the filter box, and a solvent input pipe is mounted thereon.

[0010] The present invention is further configured such that a filter bucket is connected to the tail end of the first drain pipe, and an installation plate is provided at the top of the filter bucket. A ceramic membrane is provided on the installation plate, and a water outlet cavity is formed at the top of the installation plate and a filter cavity is formed at the bottom. The leachate after preliminary filtration by the filter box will enter the filter bucket and be further filtered under the action of the ceramic membrane. Impurities will be intercepted by the ceramic membrane. The filtered water will pass through the ceramic membrane and enter the water outlet cavity through the pipe structure inside the ceramic membrane, and be discharged outward through the second drain pipe on the water outlet cavity.

[0011] The present invention is further configured such that a second inlet pipe is provided on the side wall of the filter bucket, a guide pipe is provided between the first outlet pipe and the second inlet pipe, and a second outlet pipe is provided at the top of the filter bucket. The leachate discharged through the first outlet pipe can be transported to the second inlet pipe under the action of the guide pipe, and enter the filter bucket through the second inlet pipe to achieve further filtration.

[0012] The present invention is further configured such that a cleaning scraper is provided inside the filter chamber, the cleaning scraper is slidably sleeved on the ceramic membrane, an electric push rod is provided at the top of the filter barrel, a telescopic rod is provided on the electric push rod, the cleaning scraper is set on the telescopic rod of the electric push rod, and the telescopic rod is slidably connected to the mounting plate through a sealed linear bearing. The electric push rod can control the raising and lowering movement of the cleaning scraper. When the cleaning scraper descends, it can scrape off the dirt on the surface of the ceramic membrane. At the same time, the second drain pipe is opened, so that the scraped wastewater can be discharged in a timely manner.

[0013] The present invention is further configured such that a second drain pipe is provided on the side wall of the filter bucket, and valves are provided on both the first drain pipe and the second drain pipe. Wastewater generated during the cleaning of the ceramic membrane is discharged through the second drain pipe, and the valves are used to control the opening and closing of the first drain pipe and the second drain pipe.

[0014] The present invention is further configured such that a first differential pressure gauge is connected to the inner and outer sides of the filter cylinder, and the pressure difference between the inner and outer sides of the filter cylinder can be detected by the first differential pressure gauge, thereby determining whether the filter cylinder needs to be cleaned.

[0015] The present invention is further configured such that a second differential pressure gauge is provided on the upper and lower sides of the mounting plate, and the pressure difference between the water chamber and the filter chamber can be detected by the second differential pressure gauge, thereby determining whether the ceramic membrane needs to be cleaned.

[0016] The present invention is further provided that a sedimentation hopper is provided between the first sewage pipe and the filter box. The sedimentation hopper allows the leachate impurities intercepted in the filter screen to settle in the sedimentation hopper, thereby avoiding clogging of the filter screen, improving the filtration effect, and reducing the frequency of cleaning.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a filtration device for landfill leachate, which has the following beneficial effects:

[0019] 1. This utility model includes a filter box, and inside the filter box are a filter screen cylinder, a cleaning shaft, a motor, a connecting rod, and a cleaning brush that cooperate with each other. The outer end of the cleaning brush is in contact with the inner wall of the filter screen cylinder. In this way, when the leachate is filtered through the filter screen cylinder, large particles of impurities can be intercepted by the filter screen cylinder. When the filter screen cylinder needs to be cleaned, the motor is started, and the motor controls the cleaning shaft to drive the connecting rod to rotate, so that the cleaning brush can rotate and clean the inner surface of the filter screen cylinder, thereby cleaning off the impurities adhering to the surface of the filter screen cylinder. With the above structure, the filter screen cylinder can be automatically cleaned during leachate filtration, improving the filtration effect of the leachate. This utility model has a first drain pipe at the bottom of the filter box in conjunction with the filter screen cylinder. The impurities cleaned by the cleaning brush can be discharged out through the first drain pipe. During this process, it is not necessary to stop the leachate inlet, thus improving the leachate filtration efficiency. This utility model has a first drain pipe on the side wall of the filter box. The leachate after filtration through the filter screen cylinder can be discharged from the filter box through the first drain pipe for further operation.

[0020] 2. This utility model has a first inlet pipe at the top of the filter box to guide the leachate to be filtered into the filter box. Simultaneously, an annular spray pipe is installed at the top of the inside of the filter box, extending to the outside of the filter box and equipped with a solvent input pipe. When the leachate enters the filter box through the first inlet pipe, reaction solvents such as pH adjusters, scale inhibitors, defoamers, and flocculants can be transported to the annular spray pipe through the solvent input pipe and sprayed evenly through the annular spray pipe. This allows the solvent to contact the leachate entering the filter box, improving the subsequent filtration effect. Simultaneously, impurities generated during the reaction can be promptly intercepted within the filter screen, further enhancing the filtration efficiency of the leachate.

[0021] 3. This utility model has a spiral guide vane on the cleaning shaft. The leachate entering the filter screen cylinder through the first liquid inlet pipe will fall onto the spiral guide vane and achieve spiral backflow under the action of the guide vane. In this process, the contact between the reaction solvent and the leachate wastewater can be improved, thereby improving the reaction effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a landfill leachate filtration device according to the present invention. Figure 1 ;

[0023] Figure 2This is a schematic diagram of the overall structure of a landfill leachate filtration device according to the present invention. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the internal structure of the filter box in this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the cleaning shaft, motor, connecting rod, cleaning brush, and spiral guide vanes in this utility model.

[0026] Figure 5 This is a cross-sectional view of the internal structure of the filter barrel in this utility model.

[0027] In the diagram: 1. Filter box; 2. Filter screen cylinder; 3. Cleaning shaft; 4. Motor; 5. Connecting rod; 6. Cleaning brush; 7. First drain pipe; 8. First liquid drain pipe; 9. First liquid inlet pipe; 10. Spiral guide vane; 11. Annular spray pipe; 12. Solvent input pipe; 13. Filter bucket; 14. Mounting plate; 15. Ceramic membrane; 16. Water outlet chamber; 17. Filter chamber; 18. Second liquid inlet pipe; 19. Guide pipe; 20. Second liquid drain pipe; 21. Cleaning scraper; 22. Electric push rod; 23. Telescopic rod; 24. Second drain pipe; 25. Valve; 26. First differential pressure gauge; 27. Second differential pressure gauge; 28. Sedimentation hopper. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figures 1-5A filtration device for landfill leachate includes a filter box 1, a filter screen cylinder 2 inside the filter box 1, a cleaning shaft 3 mounted inside the filter box 1 via a bearing, and a motor 4 mounted in conjunction with the cleaning shaft 3. A connecting rod 5 is mounted on the cleaning shaft 3, and a cleaning brush 6 is mounted at the tail end of the connecting rod 5. The outer end of the cleaning brush 6 is in contact with the inner wall of the filter screen cylinder 2. A first drain pipe 7 is mounted at the bottom end of the filter box 1 in conjunction with the filter screen cylinder 2. A first liquid drain pipe 8 is mounted on the side wall of the filter box 1. A first liquid inlet pipe 9 is mounted at the top end of the filter box 1. Spiral guide vanes 10 are mounted on the cleaning shaft 3. An annular spray pipe 11 is mounted at the top inside the filter box 1, extending to the outside of the filter box 1, and a solvent input pipe 12 is mounted thereon.

[0032] Please see Figures 1-5 As one embodiment of the first drain pipe 8: the tail end of the first drain pipe 8 is connected to a filter bucket 13, the top of the filter bucket 13 is provided with a mounting plate 14, a ceramic membrane 15 is provided on the mounting plate 14, and the top of the mounting plate 14 forms a water outlet cavity 16 and the bottom forms a filter cavity 17. The leachate after preliminary filtration by the filter box 1 will enter the filter bucket 13 and be further filtered under the action of the ceramic membrane 15. Impurities will be intercepted by the ceramic membrane 15. The filtered water will pass through the ceramic membrane 15 and enter the water outlet cavity 16 through the pipe structure inside the ceramic membrane 15, and be discharged outward through the second drain pipe 20 on the water outlet cavity 16.

[0033] Please see Figures 1-5 As one embodiment of the filter barrel 13: a second inlet pipe 18 is provided on the side wall of the filter barrel 13, a guide pipe 19 is provided between the first drain pipe 8 and the second inlet pipe 18, and a second drain pipe 20 is provided at the top of the filter barrel 13. The leachate discharged through the first drain pipe 8 can be transported to the second inlet pipe 18 under the action of the guide pipe 19, and enter the filter barrel 13 through the second inlet pipe 18 to achieve further filtration.

[0034] Please see Figures 1-5 As one embodiment of the filter chamber 17: a cleaning scraper 21 is provided inside the filter chamber 17, and the cleaning scraper 21 is slidably sleeved on the ceramic membrane 15. An electric push rod 22 is provided at the top of the filter barrel 13, and a telescopic rod 23 is provided on the electric push rod 22. The cleaning scraper 21 is set on the telescopic rod 23 of the electric push rod 22, and the telescopic rod 23 is slidably connected to the mounting plate 14 through a sealed linear bearing. The electric push rod 22 can control the lifting and lowering movement of the cleaning scraper 21. When the cleaning scraper 21 descends, it can scrape off the dirt on the surface of the ceramic membrane 15. At the same time, the second drain pipe 24 is opened, so that the scraped wastewater can be discharged in time.

[0035] Please see Figures 1-5As one embodiment of the filter barrel 13: a second drain pipe 24 is provided on the side wall of the filter barrel 13, and valves 25 are provided on both the first drain pipe 7 and the second drain pipe 24. Wastewater generated during the cleaning of the ceramic membrane 15 is discharged through the second drain pipe 24, and the valves 25 are used to control the opening and closing of the first drain pipe 7 and the second drain pipe 24.

[0036] Please see Figures 1-5 As one implementation of the filter cylinder 2: a first differential pressure gauge 26 is connected to the inner and outer sides of the filter cylinder 2. The first differential pressure gauge 26 can detect the pressure difference between the inner and outer sides of the filter cylinder 2, thereby determining whether the filter cylinder 2 needs to be cleaned.

[0037] Please see Figures 1-5 As one embodiment of the mounting plate 14: a second differential pressure gauge 27 is provided on the upper and lower sides of the mounting plate 14. The pressure difference between the water chamber 16 and the filter chamber 17 can be detected by the second differential pressure gauge 27, thereby determining whether the ceramic membrane 15 needs to be cleaned.

[0038] Please see Figures 1-5 As one implementation of the first drain pipe 7: a sedimentation hopper 28 is provided between the first drain pipe 7 and the filter box 1. The sedimentation hopper 28 allows the leachate impurities intercepted in the filter screen cylinder 2 to settle in the sedimentation hopper 28, thereby avoiding clogging of the filter screen cylinder 2, improving the filtration effect, and reducing the frequency of cleaning.

[0039] In summary:

[0040] This utility model includes a filter box 1, within which are arranged a filter cylinder 2, a cleaning shaft 3, a motor 4, a connecting rod 5, and a cleaning brush 6, all of which cooperate with each other. The outer end of the cleaning brush 6 is fitted against the inner wall of the filter cylinder 2. Thus, when the leachate is filtered through the filter cylinder 2, large particles can be intercepted. When the filter cylinder 2 needs cleaning, the motor 4 is started, controlling the cleaning shaft 3 to rotate the connecting rod 5, allowing the cleaning brush 6 to rotate and clean the inner surface of the filter cylinder 2, thereby removing impurities adhering to the surface of the filter cylinder 2. By adopting the above structure, the filter cylinder 2 can be cleaned during leachate filtration, thereby improving the filtration effect of the leachate. In this invention, a first drain pipe 7 is provided at the bottom of the filter box 1 in conjunction with the filter cylinder 2. Impurities cleaned by the cleaning brush 6 can be discharged out through the first drain pipe 7. During this process, it is not necessary to stop the leachate inlet, thereby improving the filtration efficiency of the leachate. In this invention, a first drain pipe 8 is provided on the side wall of the filter box 1. The leachate after being filtered by the filter cylinder 2 can be discharged from the filter box 1 through the first drain pipe 8 for further operation.

[0041] This invention features a first inlet pipe 9 at the top of the filter box 1, used to guide the leachate to be filtered into the filter box 1. Simultaneously, an annular spray pipe 11 is installed at the top of the interior of the filter box 1, extending to the outside of the filter box 1 and equipped with a solvent input pipe 12. When the leachate enters the filter box 1 through the first inlet pipe 9, reaction solvents such as pH adjusters, scale inhibitors, defoamers, and flocculants used to adjust the pH of the leachate, are transported to the annular spray pipe 11 through the solvent input pipe 12 and sprayed evenly through the annular spray pipe 11. This allows the solvent to contact the leachate entering the filter box 1, improving the subsequent filtration effect. Simultaneously, impurities generated during the reaction are promptly intercepted within the filter screen cylinder 2, further enhancing the filtration efficiency of the leachate.

[0042] This invention features a spiral guide vane 10 on the cleaning shaft 3. The leachate entering the filter cylinder 2 through the first inlet pipe 9 will fall onto the spiral guide vane 10 and achieve spiral backflow under the action of the guide vane. In this process, the contact between the reaction solvent and the leachate wastewater can be improved, thereby improving the reaction effect.

[0043] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0044] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here.

[0045] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

[0046] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here.

Claims

1. A filtration device for landfill leachate, comprising a filter box (1), characterized in that: The filter box (1) is equipped with a filter screen cylinder (2). A cleaning shaft (3) is installed in the filter box (1) via a bearing. A motor (4) is installed in conjunction with the cleaning shaft (3). A connecting rod (5) is installed on the cleaning shaft (3). A cleaning brush (6) is installed at the end of the connecting rod (5). The outer end of the cleaning brush (6) is in contact with the inner wall of the filter screen cylinder (2). A first drain pipe (7) is installed at the bottom of the filter box (1) in conjunction with the filter screen cylinder (2). A first drain pipe (8) is installed on the side wall of the filter box (1). A first inlet pipe (9) is installed at the top of the filter box (1). A spiral guide vane (10) is installed on the cleaning shaft (3). An annular spray pipe (11) is installed at the top of the inside of the filter box (1). The annular spray pipe (11) extends to the outside of the filter box (1) and is equipped with a solvent input pipe (12).

2. The filtration device for landfill leachate according to claim 1, characterized in that: The tail end of the first drain pipe (8) is connected to a filter bucket (13). The top of the filter bucket (13) is provided with an installation plate (14). A ceramic membrane (15) is provided on the installation plate (14), and a water outlet cavity (16) is formed at the top of the installation plate (14), and a filter cavity (17) is formed at the bottom.

3. A filtration device for landfill leachate according to claim 2, characterized in that: The filter barrel (13) is provided with a second inlet pipe (18) on its side wall, a guide pipe (19) is provided between the first drain pipe (8) and the second inlet pipe (18), and a second drain pipe (20) is provided at the top of the filter barrel (13).

4. A filtration device for landfill leachate according to claim 3, characterized in that: A cleaning scraper (21) is provided inside the filter chamber (17). The cleaning scraper (21) is slidably sleeved on the ceramic membrane (15). An electric push rod (22) is provided at the top of the filter barrel (13). A telescopic rod (23) is provided on the electric push rod (22). The cleaning scraper (21) is set on the telescopic rod (23) of the electric push rod (22). The telescopic rod (23) is slidably connected to the mounting plate (14) through a sealed linear bearing.

5. A filtration device for landfill leachate according to claim 4, characterized in that: A second drain pipe (24) is provided on the side wall of the filter barrel (13), and valves (25) are provided on both the first drain pipe (7) and the second drain pipe (24).

6. A filtration device for landfill leachate according to any one of claims 1-5, characterized in that: The filter cylinder (2) is equipped with a first differential pressure gauge (26) on both its inner and outer sides.

7. A filtration device for landfill leachate according to claim 2, characterized in that: The mounting plate (14) is provided with a second differential pressure gauge (27) on the upper and lower sides.

8. A filtration device for landfill leachate according to claim 1, characterized in that: A sedimentation hopper (28) is provided between the first sewage pipe (7) and the filter box (1).

Images