Active sand filter tank for sewage treatment

Abstract

The utility model relates to the technical field of sand filters, in particular to an active sand filter for sewage treatment. According to the technical scheme, the device comprises a box body, the interior of the box body is divided into a water filtering cavity, a sewage draining cavity and a water draining cavity through a first partition plate and a second partition plate, the water filtering cavity is located between the sewage draining cavity and a water draining pipe, a separating plate is fixed in the water draining cavity, a coarse sand layer is arranged at the bottom of the water filtering cavity, and a gravel layer is arranged above the coarse sand layer; a fine sand layer is arranged in the drainage cavity and located on the side, close to the water filtering cavity, of the separation plate, a drainage pipe is fixed to the outer side wall of the drainage cavity, and slag discharging holes are formed in the outer side of the sewage discharging cavity. According to the utility model, the multi-stage filtering effect can be realized by utilizing multiple layers of filtering sand, the sewage treatment energy is improved, the sewage pretreatment is carried out by utilizing the gauze element, larger particles in the sewage are not blocked, the blocking risk is reduced, and the aim of automatic cleaning is realized through the automatic movement of the gauze element.

Description

Technical Field

[0001] This utility model relates to the field of sand filter technology, specifically to an activated sand filter for wastewater treatment. Background Technology

[0002] A sand filter is a device that removes suspended solids, particulate matter, and some microorganisms from water through physical filtration and deep filtration principles. It is widely used in drinking water purification and industrial wastewater treatment. A sand filter is a pool that uses sand particles (such as quartz sand) as the filter medium. Its function is to intercept impurities in the water through the porous structure of the sand layer, thereby achieving water purification.

[0003] When using a single-layer filter, all impurities, regardless of their size, will be filtered in one layer. This can lead to faster clogging of the filter gaps, and larger particles can easily block them, making it difficult to operate for extended periods. Furthermore, when using sand filters, if pretreatment is not performed, some floating particles or impurities in the wastewater will remain on the surface of the sand layer, posing a significant risk of clogging. Using a bar screen for pretreatment requires regular manual removal of the debris from the screen, making the overall operation relatively cumbersome. Utility Model Content

[0004] The purpose of this invention is to provide an activated sand filter for wastewater treatment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a housing, which is divided into a water filtration chamber, a sewage discharge chamber, and a drainage chamber by a first partition and a second partition. The water filtration chamber is located between the sewage discharge chamber and the drainage pipe. A separation plate is fixed inside the drainage chamber. A coarse sand layer is provided at the bottom of the water filtration chamber, and a gravel layer is provided above the coarse sand layer. A fine sand layer is provided inside the drainage chamber, near the side of the separation plate close to the water filtration chamber. A drainage pipe is fixed to the outer wall of the drainage chamber. A slag discharge hole is provided on the outer side of the sewage discharge chamber. A water inlet pipe is fixed to the upper end of the housing, with its end aligned with the water filtration chamber. A mesh is provided inside the housing, above the water filtration chamber. A lifting groove is provided in the first partition, and a traction plate is slidably connected to the lifting groove via a drive assembly. A winding box is fixed inside the drainage chamber, and a winding roller is rotatably connected inside the winding box. One end of the mesh is wound around the winding roller, and the other end is fixed to the traction plate.

[0006] Preferably, the driving assembly includes a driving frame, which is fixed to a first partition plate. A driving block is slidably connected inside the driving frame. The driving block is fixed to the traction plate by a connecting block. A threaded rod is rotatably connected inside the driving frame. The threaded rod passes through the driving block and is threadedly connected to the driving block.

[0007] Preferably, a servo motor is fixed at the upper end of the drive frame, and a winding motor that drives the winding roller to rotate is fixed on the outside of the housing. A synchronization controller is installed between the winding motor and the servo motor.

[0008] Preferably, a guide roller is rotatably connected inside the box and at a position corresponding to the first partition, and the mesh passes through the guide roller.

[0009] Preferably, an end block is fixed to the upper end of the first partition, and a baffle is fixed inside the box and above the mesh at the upper end of the end block where it contacts the surface of the mesh.

[0010] Preferably, a solenoid valve is installed on the water inlet pipe, and a liquid level sensor is fixed on the second partition.

[0011] Compared with the prior art, the beneficial effects of this utility model are: multi-layer filter screen can achieve multi-stage filtration, improve the treatment capacity of sewage, and use screen for sewage pretreatment to block larger particles in sewage, reduce the risk of clogging, and achieve automatic cleaning through the autonomous movement of the screen. Attached Figure Description

[0012] Figure 1 This is a side cross-sectional view of an activated sand filter for wastewater treatment according to the present invention.

[0013] Figure 2 This is a top view schematic diagram of the structure of an activated sand filter for wastewater treatment according to the present invention.

[0014] Figure 3 This utility model relates to an activated sand filter for wastewater treatment. Figure 1 Enlarged structural diagram at point A in the middle.

[0015] In the diagram: 1. Box body; 11. First partition; 12. Second partition; 13. Filter chamber; 14. Sewage discharge chamber; 15. Drainage chamber; 16. Slag discharge hole; 17. Drainage pipe; 18. Water inlet pipe; 19. Solenoid valve; 110. Baffle; 111. Lifting trough; 112. End block; 113. Liquid level sensor; 114. Guide roller; 2. Coarse sand layer; 3. Crushed stone layer; 4. Separation plate; 5. Fine sand layer; 6. Mesh; 7. Winding box; 71. Winding roller; 72. Traction plate; 8. Drive frame; 81. Drive block; 82. Threaded rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: It includes a housing 1, which is divided into a water filtration chamber 13, a sewage discharge chamber 14, and a drainage chamber 15 by a first partition 11 and a second partition 12. The water filtration chamber 13 is located between the sewage discharge chamber 14 and a drain pipe 17. A separation plate 4 is fixed inside the drainage chamber 15. A coarse sand layer 2 is provided at the bottom of the water filtration chamber 13, and a gravel layer 3 is provided above the coarse sand layer 2. A fine sand layer 5 is provided inside the drainage chamber 15, on the side of the separation plate 4 near the water filtration chamber 13. A drain pipe 17 is fixed to the outer wall of the drainage chamber 15. A slag discharge hole 16 is provided on the outer side of the sewage discharge chamber 14. A water inlet pipe 18 is fixed to the upper end of the housing 1, with the end of the water inlet pipe 18 aligned with the water filtration chamber 13. A mesh 6 is installed inside the housing 1 and above the water filtration chamber 13. A lifting groove 111 is provided in the first partition 11. A traction plate 72 is slidably connected to the lifting groove 111 through a drive assembly. A winding box 7 is fixed inside the drainage chamber 15. A winding roller 71 is rotatably connected inside the winding box 7. One end of the mesh 6 is wrapped around the winding roller 71, and the other end is fixed to the traction plate 72. A guide roller 114 is rotatably connected inside the housing 1 and at a position corresponding to the first partition 11. The mesh 6 passes through the guide roller 114. An end block 112 is fixed at the upper end of the first partition 11. The upper end of the end block 112 contacts the surface of the mesh 6. A baffle 110 is fixed inside the housing 1 and above the mesh 6.

[0018] The drive assembly includes a drive frame 8, which is fixed on the first partition 11. A drive block 81 is slidably connected inside the drive frame 8. The drive block 81 is fixed to the traction plate 72 by a connecting block. A threaded rod 82 is rotatably connected inside the drive frame 8. The threaded rod 82 passes through the drive block 81 and is threadedly connected to the drive block 81. A servo motor is fixed at the upper end of the drive frame 8, and a winding motor that drives the winding roller 71 to rotate is fixed on the outside of the housing 1. A synchronous controller is installed between the winding motor and the servo motor.

[0019] A solenoid valve 19 is installed on the water inlet pipe 18, and a liquid level sensor 113 is fixed on the second partition 12.

[0020] Working principle: First, connect the entire device to an external power source. Then, discharge wastewater through the inlet pipe 18, allowing it to enter the filter chamber 13 for filtration. Under its own gravity, it will pass through the gravel layer 3 and the coarse sand layer 2 in sequence, and then flow upward from the bottom of the fine sand layer 5. Finally, the purified water is discharged from the drain pipe 17. Using different sized particles for graded filtration can reduce the risk of clogging and ensure the normal operation of the equipment. Secondly, before the wastewater enters the filter chamber 13, it will undergo pre-filtration through the mesh screen 6 to retain larger pollutants or floating objects on the mesh screen 6. At the same time, when cleaning the impurities on the mesh, the synchronous drive of the winding motor and the servo motor can be used to drive the winding roller 71. The rotation and extension / retraction of the traction plate 72, when the take-up roller 71 unwinds, the downward movement of the traction plate 72 can transport impurities on the mesh 6 to the side of the drain chamber 14, where they eventually fall into the drain chamber 14. Conversely, it can reset the mesh 6. During driving, a servo motor drives the threaded rod 82 to rotate, causing the drive block 81 to move up and down, thereby driving the traction plate 72 to move up and down. Furthermore, the baffle 110 prevents the pre-treated impurities from moving to the innermost part of the mesh 6. Throughout the purification process, the liquid level sensor 113 monitors and controls the opening and closing of the solenoid valve 19 to ensure that the water level in the filter chamber 13 is controlled within a preset range, ensuring the normal operation of the equipment.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An activated sand filter for wastewater treatment, comprising a housing (1), characterized in that: The housing (1) is divided into a water filtration chamber (13), a sewage discharge chamber (14), and a drainage chamber (15) by a first partition (11) and a second partition (12). The water filtration chamber (13) is located between the sewage discharge chamber (14) and the drain pipe (17). A separation plate (4) is fixed inside the drainage chamber (15). A coarse sand layer (2) is provided at the bottom of the water filtration chamber (13), and a gravel layer (3) is provided above the coarse sand layer (2). A fine sand layer (5) is provided inside the drainage chamber (15) and on the side of the separation plate (4) near the water filtration chamber (13). A drain pipe (17) is fixed to the outer wall of the drainage chamber (15). The sewage discharge chamber (14) is... A slag discharge hole (16) is provided on the outside. A water inlet pipe (18) is fixed at the upper end of the box (1). The end of the water inlet pipe (18) is aligned with the water filter chamber (13). A mesh (6) is provided inside the box (1) and above the water filter chamber (13). A lifting groove (111) is provided in the first partition (11). A traction plate (72) is slidably connected in the lifting groove (111) through a drive assembly. A winding box (7) is fixed in the drainage chamber (15). A winding roller (71) is rotatably connected in the winding box (7). One end of the mesh (6) is wrapped around the winding roller (71), and the other end is fixed on the traction plate (72).

2. The activated sand filter for wastewater treatment according to claim 1, characterized in that: The drive assembly includes a drive frame (8) which is fixed on a first partition (11). A drive block (81) is slidably connected inside the drive frame (8). The drive block (81) is fixed to the traction plate (72) by a connecting block. A threaded rod (82) is rotatably connected inside the drive frame (8). The threaded rod (82) passes through the drive block (81) and is threadedly connected to the drive block (81).

3. An activated sand filter for wastewater treatment according to claim 2, characterized in that: A servo motor is fixed at the upper end of the drive frame (8), and a winding motor that drives the winding roller (71) to rotate is fixed on the outside of the housing (1). A synchronous controller is installed between the winding motor and the servo motor.

4. An activated sand filter for wastewater treatment according to claim 1, characterized in that: Inside the housing (1) and at a position corresponding to the first partition (11), there is a guide roller (114) rotatably connected, and the mesh (6) passes through the guide roller (114).

5. An activated sand filter for wastewater treatment according to claim 1, characterized in that: An end block (112) is fixed at the upper end of the first partition (11). At the point where the upper end of the end block (112) contacts the surface of the mesh (6), a baffle (110) is fixed inside the box (1) and above the mesh (6).

6. An activated sand filter for wastewater treatment according to claim 1, characterized in that: A solenoid valve (19) is installed on the water inlet pipe (18), and a liquid level sensor (113) is fixed on the second partition (12).

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