Efficient denitrification deep-bed filter tank

Abstract

The utility model relates to the technical field of sewage treatment, and discloses an efficient denitrification deep bed filter which comprises a filter body, a sewage inlet pipe and a sewage discharge pipe are respectively arranged at two ends of the bottom of the filter body, a filter layer and a filter screen plate are arranged in one side of the filter body from top to bottom, and a clear water discharge pipe is arranged at the top of one end of the filter body. And a movable backwashing mechanism is arranged at the top of the tank body. According to the utility model, the movable backwashing mechanism is arranged at the top of the tank body, the washing position can be changed when a filter material is subjected to backwashing, the moving stroke of the movable backwashing mechanism covers the filter material, so that a backwashing dead angle is avoided when the filter material is subjected to backwashing, meanwhile, the filter material can be stirred when the filter material is subjected to backwashing due to the arrangement of the air flushing structure, and the backwashing effect is improved. The sprayed gas drives the filter material to perform more intense collision and friction, so that the backwashing effect can be further improved, and the denitrification effect of the filter material is further improved.

Description

Technical Field

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

[0002] The deep bed denitrification filter is a treatment unit that integrates biological denitrification and filtration functions. It is a unique advanced treatment process that combines denitrification and filtration. It is a common biological treatment technology that can effectively remove nitrogen pollutants and fixed impurities in water.

[0003] A sulfur autotrophic upward flow denitrification deep bed filter tank with announcement number CN219972014U includes a tank body, a mesh plate is connected to the interior of the tank body, a denitrification mechanism is arranged above the mesh plate, a backwashing mechanism is arranged above the denitrification mechanism, a first connecting pipe and a second connecting pipe are connected to the left and right sides of the bottom of the tank body respectively, and a feeding mechanism is arranged on the front and rear end surfaces of the tank body. The utility model improves the efficiency and capacity of denitrification by providing a series of structures, and can add filter material in time when it is consumed. However, the position of the top backwashing mechanism is fixed, and the flushing position cannot be changed. There are dead corners when backwashing the filter material, which may cause dirt to accumulate on the surface of the filter material, limit the contact between oxygen and wastewater, affect the activity and growth of denitrifying microorganisms, and reduce the denitrification effect.

[0004] Therefore, we proposed a highly efficient denitrification deep bed filter to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art in the above background technology, the purpose of the utility model is to provide a high-efficiency denitrification deep bed filter to solve the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] An efficient denitrification deep bed filter, comprising a tank body with a sewage inlet pipe and a sewage outlet pipe respectively arranged at both ends of the bottom, a filter layer and a filter screen plate arranged from top to bottom inside one side of the tank body, a clean water outlet pipe arranged at the top of one end of the tank body, and a movable backwashing mechanism arranged at the top of the tank body;

[0010] The mobile backwashing mechanism includes a screw that is rotatably installed on both sides of the pool body, and a base that is threadedly connected to the two screws. The base is located above the pool body and a water tank is fixed on the top. A plurality of flushing nozzles connected to the water tank are arranged at the bottom of the base. A driving motor connected to a rotating shaft and a screw is arranged on one side of the pool body.

[0011] Furthermore, the water tank is connected to an external water source via a water supply pipe arranged on one side of the water tank.

[0012] Furthermore, the filter layer is a biological ceramsite layer.

[0013] Preferably, an air impulse mechanism connected to a lead screw through a transmission mechanism is provided inside the filter layer, the air impulse mechanism comprises an air impulse tube rotatably mounted on the two end walls of the pool body and a plurality of stirring components spaced apart on the air impulse tube, one end of the air impulse tube passes through the end wall of the pool body and is connected to an external air source, the stirring component comprises a plurality of stirring rods evenly distributed along the circumference of the air impulse tube, a connecting cavity connected to the air impulse tube is provided inside the stirring rod, and an air impulse hole connected to the connecting cavity is provided on the outside of the stirring rod.

[0014] Furthermore, the transmission mechanism includes two gears respectively fixed on the air-punch tube and the lead screw and a transmission chain connecting the two gears.

[0015] Preferably, both the sewage inlet pipe and the sewage outlet pipe are provided with control valves.

[0016] Preferably, stabilizing rods parallel to the lead screw are provided on both sides of the pool body, and the base is slidably connected to the stabilizing rods.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By arranging a mobile backwashing mechanism on the top of the pool body, the flushing position can be changed when the filter material is backwashed, and its moving stroke covers the top of the filter material to avoid the existence of backwashing dead corners when the filter material is backwashed. At the same time, the setting of the air-blast structure can stir the filter material when the filter material is backwashed, and the ejected gas drives the filter material to collide and rub more violently, which can further improve the backwashing effect and thereby improve the denitrification effect of the filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model's efficient denitrification deep bed filter;

[0021] Figure 2 It is a schematic diagram of the front cross-sectional structure of the high-efficiency denitrification deep bed filter of the utility model;

[0022] Figure 3 It is a schematic diagram of the side cross-sectional structure of the high-efficiency denitrification deep bed filter of the utility model;

[0023] Figure 4 This is an enlarged view of point A of the high-efficiency denitrification deep bed filter of the utility model;

[0024] Figure 5 It is a schematic diagram of the bottom structure of the base of the high-efficiency denitrification deep bed filter of the utility model.

[0025] In the figure: pool body 1, sewage inlet pipe 2, sewage discharge pipe 3, filter layer 4, filter screen plate 5, mobile backwashing mechanism 6, fixed seat 61, screw 62, base 63, water tank 64, flushing nozzle 65, drive motor 66, water supply pipe 67, air flushing mechanism 7, air flushing pipe 71, stirring rod 72, connecting chamber 73, air flushing hole 74, transmission mechanism 8, gear 81, transmission chain 82, clean water discharge pipe 9, control valve 10, stabilizer bar 11. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 As shown, the utility model provides a high-efficiency denitrification deep bed filter, including a tank body 1 with a sewage inlet pipe 2 and a sewage discharge pipe 3 respectively arranged at both ends of the bottom, a mobile backwashing mechanism 6 and an air flushing mechanism 7, a filter layer 4 and a filter screen 5 are arranged from top to bottom inside one side of the tank body 1, the filter layer 4 is a biological ceramsite layer, and the biological ceramsite fixed biofilm system is used for biological treatment and nitrogen removal, a clean water discharge pipe 9 is arranged on the top of one end of the tank body 1, and control valves 10 are arranged on the sewage inlet pipe 2 and the sewage discharge pipe 3. The control valve 10 can be a butterfly valve, etc., which is used to control the opening and closing of the sewage inlet pipe 2 and the sewage discharge pipe 3, and a mobile backwashing mechanism 6 is arranged on the top of the tank body 1.

[0028] When filtering sewage, the valve on the sewage inlet pipe 2 is opened and the valve on the sewage discharge pipe 3 is closed. At this time, sewage enters the bottom of the pool body 1 through the sewage inlet pipe 2, and the clean water filtered by the filter screen plate 5 and the filter layer 4 is discharged from the clean water discharge pipe 9; when backwashing, the valve on the sewage inlet pipe 2 is closed, and the valve on the sewage discharge pipe 3 is opened. The filter material is backwashed by the mobile backwashing mechanism 6, and the dirt after flushing is discharged from the sewage discharge pipe 3.

[0029] like Figure 1 and Figure 3 As shown, the mobile backwashing mechanism 6 includes a fixed seat 61, a screw 62, a base 63, a water tank 64, a flushing nozzle 65, a driving motor 66 and a water supply pipe 67. There are two screws 62, which are symmetrically arranged on the outside of both sides of the pool body 1, and their two ends are rotatably connected to the fixed seat 61. The fixed seat 61 is fixed on the side wall of the pool body 1. The base 63 is a U-shaped structure, which spans the top of the pool body 1, and its two ends are respectively threadedly connected to the two screws 62. A water tank 64 is fixed on the top of the base 63, and the water tank 64 is connected to an external water source through a water supply pipe 67. A plurality of flushing nozzles 65 are arranged at the bottom of the water tank 64. The top of the flushing nozzle 65 is connected to the water tank 64, and the bottom flushing port thereof passes through the base 63 and extends to the outside of the bottom of the base 63. A driving motor 66 connected to the screw 62 with a rotating shaft is arranged on one side of the pool body 1. The driving motor 66 is preferably a servo motor or a reduction motor to change the direction of the screw 62. When the filter material is backwashed, the screw 62 is driven to rotate by the driving motor 66, so that the base 63 moves along the axial direction of the screw 62. When moving, the flushing nozzle 65 flushes the flushing water inside the water tank 64 to the filter layer 4 to flush the filter material. Preferably, the flushing nozzle 6 is set in two groups, and the two groups of nozzles are staggered to increase the flushing coverage of the filter layer 4 when the base 3 moves, reduce the existence of flushing dead corners, avoid dirt accumulation on the surface of the filter material, limit the contact between oxygen and wastewater, affect the activity and growth of denitrifying microorganisms, and thus improve the denitrification effect.

[0030] An air impulse mechanism 7 is arranged inside the filter layer 4, and the air impulse mechanism 7 is connected to the lead screw 62 through a transmission mechanism 8. The air impulse mechanism 7 includes an air impulse tube 71 rotatably mounted on the two end walls of the pool body 1 and a plurality of stirring components arranged on the air impulse tube 71 at intervals along its axial direction. The transmission mechanism 8 includes two gears 81 respectively fixed on the air impulse tube 71 and the lead screw 62, and a transmission chain 82 connecting the two gears 81. One end of the air impulse tube 71 passes through the end wall of the pool body 1 and can be connected to an external high-pressure air source through a hose, etc. The stirring component includes a plurality of stirring rods 72 uniformly distributed along the circumference of the air impulse tube 71, a connecting cavity 73 connected to the air impulse tube 71 is opened inside the stirring rod 72, and an air impulse hole 74 connected to the connecting cavity 73 is arranged on the outside of the stirring rod 72. The two air impulse holes 74 are in an eight-shaped structure, and their air outlets are inclined to the side away from the air impulse tube 71.

[0031] When the lead screw 62 rotates, the air flushing tube 71 is driven to rotate through the gear 81 and the transmission chain 82. When the air flushing tube 71 rotates, the filter material particles of the filter layer 4 are stirred through the stirring rod 72. At the same time, the external high-pressure gas source passes the high-pressure gas through the air flushing tube 71 and the connecting cavity 73 and then sprays it out from the air flushing hole 74, impacting the filter material particles, causing them to collide more violently, thereby promoting the shedding of dirt and biofilm attached to the biological ceramsite, making it easier to be taken away by the cleaning and flushing water, so as to improve the backwashing effect.

[0032] like Figure 1 As shown, as a preferred technical solution of the utility model: two groups of air impulse mechanisms 7 can be provided in the filter layer 4, and the transmission process is: a gear is added to the air impulse tube 71 connected to the screw 62, and the gear and the transmission chain are connected to the gear on the other air impulse tube 71, thereby improving the stirring effect on the filter layer 4.

[0033] As a preferred technical solution of the utility model: stabilizing rods 11 parallel to the screw 62 are arranged on both sides of the pool body 1, and sliding holes slidably connected to the stabilizing rods 11 are opened on the base 63, so as to further improve the stability of the base 3 when moving.

[0034] The electrical components mentioned in this article can be electrically connected to an external controller, and the controller can be electrically connected to an external 220V mains power supply, and the controller can be a conventional known device such as a computer that performs control.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be noted that, in the present invention, unless otherwise clearly specified and limited, the terms such as “set”, “install”, “connected”, “connected”, “fixed”, etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can also be indirectly connected through an intermediate medium.

[0036] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0037] For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances; for technicians in this field, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An efficient denitrification deep bed filter, comprising a tank body (1) with a sewage inlet pipe (2) and a sewage outlet pipe (3) respectively arranged at both ends of the bottom, characterized in that: A filter layer (4) and a filter screen (5) are arranged from top to bottom inside one side of the pool body (1), a clean water discharge pipe (9) is arranged at the top of one end of the pool body (1), and a movable backwashing mechanism (6) is arranged at the top of the pool body (1); The mobile backwashing mechanism (6) comprises screws (62) rotatably mounted on both sides of the pool body (1), and a base (63) threadedly connected to the two screws (62); the base (63) is located above the pool body (1) and has a water tank (64) fixed on the top; a plurality of flushing nozzles (65) connected to the water tank (64) are arranged at the bottom of the base (63); and a driving motor (66) having a rotating shaft connected to the screws (62) is arranged on one side of the pool body (1).

2. The efficient denitrification deep bed filter according to claim 1, characterized in that: The water tank (64) is connected to an external water source via a water supply pipe (67) arranged on one side thereof.

3. The efficient denitrification deep bed filter according to claim 1, characterized in that: The filter layer (4) is a biological ceramsite layer.

4. The efficient denitrification deep bed filter according to claim 3, characterized in that: An air-jet mechanism (7) connected to a lead screw (62) via a transmission mechanism (8) is arranged inside the filter layer (4); the air-jet mechanism (7) comprises an air-jet pipe (71) rotatably mounted on the two end walls of the pool body (1) and a plurality of stirring components arranged at intervals on the air-jet pipe (71); one end of the air-jet pipe (71) passes through the end wall of the pool body (1) and is connected to an external air source; the stirring component comprises a plurality of stirring rods (72) uniformly distributed along the circumference of the air-jet pipe (71); a connecting cavity (73) connected to the air-jet pipe (71) is provided inside the stirring rod (72); and an air-jet hole (74) connected to the connecting cavity (73) is provided on the outside of the stirring rod (72).

5. The efficient denitrification deep bed filter according to claim 4, characterized in that: The transmission mechanism (8) comprises two gears (81) respectively fixed on the air flushing tube (71) and the lead screw (62), and a transmission chain (82) connecting the two gears (81).

6. The efficient denitrification deep bed filter according to claim 1, characterized in that: The sewage inlet pipe (2) and the sewage outlet pipe (3) are both provided with control valves (10).

7. The efficient denitrification deep bed filter according to claim 1, characterized in that: Stabilizing rods (11) parallel to the lead screw (62) are provided on both sides of the pool body (1), and the base (63) is slidably connected to the stabilizing rods (11).

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