Multi-stage denitrification deep-bed filter tank

Abstract

The utility model discloses a multistage denitrification deep bed filter which comprises a filter body, a middle-section filter box is fixedly mounted at the top of the filter body, a top-end filter box is fixedly mounted at the top of the middle-section filter box, and a coarse sand layer is fixedly connected to the position, close to the bottom, in the top-end filter box. A fine sand layer, an activated carbon layer, a fiber filter screen and a membrane filter layer are sequentially and fixedly connected to the interior of the middle-section filter box from top to bottom. According to the multi-stage denitrification deep-bed filter tank, the cleaning brush is arranged in the top end filter tank and is matched with a sliding structure of an air cylinder, a driving motor and a movable plate, so that automatic cleaning of a coarse sand layer is realized, and the cleaning brush is driven by the driving motor, and the air cylinder enables the movable plate to move back and forth along a supporting sliding rod; organic matters, microorganism residue dirt and impurities accumulated on the coarse sand layer are effectively removed, the cleanliness of the pre-filtering layer is remarkably improved, and the phenomena of hardening and blocking of a filter material are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a multi-stage denitrification deep bed filter. Background Art

[0002] The denitrification filter organically combines denitrification with deep bed filtration. It is a treatment unit that integrates biological denitrification and filtration functions. It mainly relies on the biofilm of denitrifying bacteria attached to and grown on the surface of the filter material. Under anoxic / anaerobic conditions, it utilizes carbon sources to decompose nitrate nitrogen in the wastewater, thereby removing total nitrogen from the wastewater, and intercepting and removing suspended matter and TP in the water through the adsorption and bridging effect of the filter material.

[0003] The existing denitrification deep bed filter design includes multiple stages such as water inlet, biological reaction and filtration. In the filtration stage, quartz sand and other filter materials are usually used for physical interception to remove suspended matter and impurities in the water. However, in the actual operation process, the pre-filter layer, such as the coarse sand layer, plays an important role in the denitrification deep bed filter. They can not only intercept larger particle impurities in the water, but also provide space for the attachment and growth of denitrifying bacteria, promoting the biological denitrification process. However, as time goes by, the pre-filter layer will gradually accumulate a large amount of dirt and impurities, such as organic matter and microbial residues. These accumulations not only occupy the pores of the filter material and reduce the permeability of the filter material, but also may cause the filter material to compact and affect the filtration effect. When accumulated to a certain extent, the pre-filter layer will be blocked, resulting in a reduction in the water inlet flow rate or even complete blockage. This not only affects the normal operation of the filter, but also may have an adverse effect on the subsequent treatment process, such as increasing the burden of the subsequent treatment unit and reducing the overall treatment efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-stage denitrification deep bed filter to solve the problem proposed in the above background technology that over time, a large amount of dirt and impurities, such as organic matter, microbial residues, etc., will gradually accumulate in the pre-filtration layer. These accumulations not only occupy the pores of the filter material and reduce the permeability of the filter material, but may also cause the filter material to become compacted, affecting the filtering effect. When the accumulation reaches a certain level, the pre-filtration layer will be blocked, resulting in a reduction in the water inlet flow rate or even complete blockage, which not only affects the normal operation of the filter tank, but may also have an adverse effect on subsequent treatment processes, such as increasing the burden on subsequent treatment units and reducing the overall treatment efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage denitrification deep bed filter, comprising a tank body, a middle filter box is fixedly installed on the top of the tank body, a top filter box is fixedly installed on the top of the middle filter box, a coarse sand layer is fixedly connected to the bottom position of the top filter box, a fine sand layer, an activated carbon layer, a fiber filter screen and a membrane filter layer are fixedly connected to the interior of the middle filter box from top to bottom in sequence, support slide bars are fixedly connected to the top of the coarse sand layer at the front and rear ends of the bottom position of the top filter box, and moving plates are slidably connected to the two sides of the two support slide bars, a driving motor is fixedly installed on the top of the moving plate, and an output end of the bottom of the driving motor passes through the outside of the moving plate and a cleaning brush is fixedly installed.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] The multi-stage denitrification deep bed filter realizes automatic cleaning of the coarse sand layer by arranging a cleaning brush in the top filter box and cooperating with the sliding structure of the cylinder, the driving motor and the moving plate. The cleaning brush is driven by the driving motor, and the cylinder moves the moving plate back and forth along the supporting slide rod, effectively removing organic matter, microbial residues, dirt and impurities accumulated on the coarse sand layer, significantly improving the cleanliness of the pre-filter layer, and effectively preventing the compaction and clogging of the filter material. Even after long-term operation, the pre-filter layer can still maintain good filtration performance, avoiding the problem of reduced water flow or complete blockage due to clogging. Due to the improved cleanliness and restored permeability of the coarse sand layer, the treatment efficiency of the entire denitrification deep bed filter is significantly improved, the water flow is stable, and the filtration effect is good, which provides high-quality water inlet conditions for subsequent treatment processes, reduces the burden on subsequent treatment units, and improves the overall treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0010] Figure 3 For this utility model Figure 2 A is a partial enlarged schematic diagram;

[0011] Figure 4 It is a structural stereogram of the movable plate of the utility model.

[0012] In the figure: 1. Pool body; 2. Middle filter box; 3. Top filter box; 4. Water inlet pipe; 5. Coarse sand layer; 6. Fine sand layer; 7. Activated carbon layer; 8. Fiber filter; 9. Membrane filter layer; 10. Water collecting box; 11. Connecting water pipe; 12. Water pump; 13. Drain pipe; 14. Nozzle 1; 15. Nozzle 2; 16. Drainage plate; 17. Support slide bar; 18. Moving plate; 19. Waterproof shell; 20. Driving motor; 21. Cleaning brush; 22. Cylinder; 23. Push rod; 24. Movable sealing door. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figure 1-4 The utility model provides a technical solution: a multi-stage denitrification deep bed filter, comprising a tank body 1, a middle filter box 2 is fixedly installed on the top of the tank body 1, a top filter box 3 is fixedly installed on the top of the middle filter box 2, a coarse sand layer 5 is fixedly connected to the bottom position of the top filter box 3, a fine sand layer 6, an activated carbon layer 7, a fiber filter screen 8 and a membrane filter layer 9 are fixedly connected in sequence from top to bottom inside the middle filter box 2, a support slide bar 17 is fixedly connected to the front and rear ends of the top filter box 3 at the bottom position corresponding to the top of the coarse sand layer 5, a moving plate 18 is slidably connected to the two sides of the two support slide bars 17, a driving motor 20 is fixedly installed on the top of the moving plate 18, and a cleaning brush 21 is fixedly installed on the outside of the moving plate 18 at the output end of the bottom of the driving motor 20 that penetrates through the moving plate 18.

[0015] The center of the top of the top filter box 3 is connected with a water inlet pipe 4.

[0016] A water collecting box 10 is fixedly installed on both sides of the top of the top filter box 3, and a water pump 12 is fixedly installed at the bottom of the water collecting box 10. The output end of the bottom of the water pump 12 is connected to a drain pipe 13, and the bottom of the drain pipe 13 penetrates into the interior of the top filter box 3 and is connected to a connecting water pipe 11. The center of the bottom of the connecting water pipe 11 is connected to a nozzle 14, and both sides of the bottom of the connecting water pipe 11 are connected to nozzles 2 15, which can thoroughly remove the residue on the coarse sand layer 5 and maintain the permeability and filtering effect of the filter layer.

[0017] Drainage plates 16 are fixedly connected to the bottom of the top filter box 3 on both sides corresponding to the lower part of the coarse sand layer 5 to facilitate guiding water to the middle filter box 2.

[0018] A waterproof shell 19 is fixedly connected to the top of the moving plate 18 corresponding to the outer side of the driving motor 20 to achieve waterproof effect. The total number of driving motors 20 is six.

[0019] Cylinders 22 are fixedly installed at the center of both sides of the top filter box 3, and the output ends of the two cylinders 22 on the opposite sides penetrate into the interior of the top filter box 3 and are fixedly connected with push rods 23. One side of the push rod 23 is fixedly connected to the center of one side of the movable plate 18, which can facilitate the movement of the movable plate 18, thereby facilitating the cleaning brush 21 to comprehensively clean the coarse sand layer 5.

[0020] A movable sealing door 24 is movably installed at a center position on the front surface of the top filter box 3, and a water outlet pipe is connected to the bottom of one side of the pool body 1.

[0021] Working principle: sewage first enters the top filter box 3 through the water inlet pipe 4. In the top filter box 3, the coarse sand layer 5 is used as a pre-filter layer to first intercept and remove larger particles and suspended solids in the sewage. Subsequently, the sewage that has been preliminarily treated is guided by the drainage plate 16 and flows into the middle filter box 2. In the middle filter box 2, the sewage is sequentially filtered through the fine sand layer 6, the activated carbon layer 7, the fiber filter 8 and the membrane filter layer 9. The fine sand layer 6 further removes smaller particles in the sewage, and the activated carbon layer 7 removes organic matter and certain soluble impurities by adsorption. The fiber filter 8 and the membrane filter layer 9 provide a more refined filtering effect to ensure that the effluent water quality meets the requirements. The clean water after multi-stage filtration is finally discharged through the outlet pipe on one side of the tank body 1, completing the entire treatment process; when it is necessary to clean the coarse sand layer 5, the cylinder 22 starts to work, and its output end The push rod 23 is pushed to move, and the push rod 23 is connected to the movable plate 18, so it will drive the movable plate 18 to slide along the supporting slide bar 17, and the driving motor 20 and the cleaning brush 21 installed on the movable plate 18 will move to the top of the coarse sand layer 5. After the driving motor 20 is started, the output end at its bottom drives the cleaning brush 21 to rotate. At the same time, the movable plate 18 is driven by the cylinder 22 and the push rod 23 to reciprocate along the supporting slide bar 17, so that the cleaning brush 21 can comprehensively clean the surface of the coarse sand layer 5. In addition, the water pump 12 in the water collecting tank 10 also starts to work, and water is supplied to the nozzle 14 and the nozzle 2 15 through the drain pipe 13 and the connecting water pipe 11. The water flow sprayed by the nozzle 14 and the nozzle 2 15 can cooperate with the work of the cleaning brush 21 to further rinse the residue on the coarse sand layer 5 to ensure thorough cleaning.

[0022] In summary: the multi-stage denitrification deep bed filter realizes automatic cleaning of the coarse sand layer 5 by setting a cleaning brush 21 in the top filter box 3, cooperating with the sliding structure of the cylinder 22, the drive motor 20 and the movable plate 18. The cleaning brush 21 is driven by the drive motor 20, and the cylinder 22 reciprocates the movable plate 18 along the supporting slide rod 17, effectively removing the organic matter, microbial residues, dirt and impurities accumulated on the coarse sand layer 5, significantly improving the cleanliness of the pre-filter layer, and effectively preventing the compaction and clogging of the filter material. Even after long-term operation, the pre-filter layer can still maintain good filtering performance, avoiding the problem of reduced water flow or complete blockage due to clogging. Due to the improved cleanliness and restored permeability of the coarse sand layer 5, the treatment efficiency of the entire denitrification deep bed filter is significantly improved, the water flow is stable, and the filtering effect is good, which provides high-quality water inlet conditions for subsequent treatment processes, reduces the burden of subsequent treatment units, and improves the overall treatment efficiency.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage denitrification deep bed filter, comprising a tank body (1), characterized in that: A middle filter box (2) is fixedly mounted on the top of the pool body (1), a top filter box (3) is fixedly mounted on the top of the middle filter box (2), a coarse sand layer (5) is fixedly connected to the bottom of the top filter box (3), a fine sand layer (6), an activated carbon layer (7), a fiber filter screen (8) and a membrane filter layer (9) are fixedly connected to the inside of the middle filter box (2) in order from top to bottom, a support slide bar (17) is fixedly connected to the top of the coarse sand layer (5) at the front and rear ends of the bottom of the top filter box (3), and a movable plate (18) is slidably connected to the two sides of the two support slide bars (17), a drive motor (20) is fixedly mounted on the top of the movable plate (18), and a cleaning brush (21) is fixedly mounted on the output end of the bottom of the drive motor (20) that passes through the outside of the movable plate (18).

2. A multi-stage denitrification deep bed filter according to claim 1, characterized in that: The center of the top of the top filter box (3) is connected to a water inlet pipe (4).

3. A multi-stage denitrification deep bed filter according to claim 1, characterized in that: A water collecting box (10) is fixedly installed on both sides of the top of the top filter box (3), a water pump (12) is fixedly installed at the bottom of the water collecting box (10), the output end of the bottom of the water pump (12) is connected to a drainage pipe (13), the bottom of the drainage pipe (13) passes through the interior of the top filter box (3) and is connected to a connecting water pipe (11), the center of the bottom of the connecting water pipe (11) is connected to a nozzle 1 (14), and both sides of the bottom of the connecting water pipe (11) are connected to nozzles 2 (15).

4. The multi-stage denitrification deep bed filter according to claim 1, characterized in that: Drainage plates (16) are fixedly connected to the bottom of the top filter box (3) on both sides of the bottom corresponding to the coarse sand layer (5).

5. The multi-stage denitrification deep bed filter according to claim 1, characterized in that: A waterproof housing (19) is fixedly connected to the top of the movable plate (18) corresponding to the outer side of the drive motor (20), and the total number of the drive motors (20) provided is six.

6. The multi-stage denitrification deep bed filter according to claim 1, characterized in that: Cylinders (22) are fixedly mounted at the centre of both sides of the top filter box (3); output ends of the two cylinders (22) on opposite sides extend through the interior of the top filter box (3) and are fixedly connected to push rods (23); one side of the push rod (23) is fixedly connected to the centre of one side of the moving plate (18).

7. The multi-stage denitrification deep bed filter according to claim 1, characterized in that: A movable sealing door (24) is movably installed at a central position on the front surface of the top filter box (3), and a water outlet pipe is connected to the bottom of one side of the pool body (1).

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