Air-flushed denitrification deep-bed filter

Abstract

The application discloses an air-flushing denitrification deep-bed filter, and belongs to the technical field of sewage treatment equipment. Mainly comprising a deep-bed filter and a water inlet pool, the water inlet pool is arranged on one side of the deep-bed filter, the water inlet pool is provided with at least one group of water inlet holes, at least one group of overflow pools is arranged in the deep-bed filter, the overflow pools are correspondingly connected with the water inlet holes through pipelines, and the end face and the bottom of the overflow pool are provided with a slot, an overflow plate is arranged in the slot and is adapted to slide in the slot to adjust the position of the end face of the overflow plate. The air-flushing denitrification deep-bed filter can conveniently adjust the position of the overflow plate by arranging the overflow plate in a sliding installation mode, so that the height of the water inlet of the deep-bed filter can be flexibly adjusted according to the position of the wastewater liquid surface, the dissolved oxygen concentration carried in the entering wastewater is kept stable, and the efficiency of the denitrification reaction is ensured.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, specifically to an air-flushing denitrification deep bed filter. Background Technology

[0002] Denitrification, also known as nitrogen removal, is a biochemical process in which bacteria reduce nitrogen in nitrate to nitrogen gas through a series of intermediate products. The bacteria involved in this process are collectively called denitrifying bacteria. Under anaerobic conditions, denitrifying bacteria use nitrate as an electron acceptor to complete respiration in order to obtain energy. Denitrification is often used in the treatment and purification of ammonia nitrogen in wastewater through denitrification deep bed filters.

[0003] Denitrification in wastewater is the process by which NO2-N and NO3-N in wastewater are reduced to N2 under anaerobic conditions by denitrifying bacteria. Denitrifying bacteria are facultative bacteria, capable of both aerobic and anaerobic respiration. When molecular oxygen and nitrates are present simultaneously, aerobic respiration is preferentially performed because it generates more energy. To ensure successful denitrification, an anaerobic environment must be maintained. Generally, dissolved oxygen should be kept below 0.5 mg / L for the denitrification reaction to proceed normally.

[0004] Denitrification deep bed filter is a deep treatment technology that simultaneously possesses the functions of filtration, denitrification, and chemical phosphorus removal. In recent years, it has been widely used in the deep treatment and upgrading of wastewater treatment plants.

[0005] Currently, denitrification deep bed filters typically use a drop-in water intake method with inlet weirs on both sides. The height of the drop-in water is usually controlled between 0.1 and 0.2 meters to ensure that the inlet water does not carry too much dissolved oxygen.

[0006] However, the liquid level in the denitrification deep bed filter will vary with the wastewater treatment process, resulting in fluctuations in the drop height. This leads to significant fluctuations in the dissolved oxygen concentration carried by the incoming wastewater, which in turn affects the denitrification reaction. Therefore, it is necessary to provide an air-flushing denitrification deep bed filter to solve the above problems.

[0007] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0008] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide an air-flushing denitrification deep bed filter, which solves the problem of fluctuation in the drop height when the wastewater level changes in the denitrification deep bed filter.

[0009] The technical solution adopted by this application to solve its technical problem is: an air-flushing denitrification deep bed filter, comprising a deep bed filter; an inlet pool disposed on one side of the deep bed filter, the inlet pool having at least one set of inlet holes; at least one overflow pool disposed within the deep bed filter, the overflow pool corresponding to the inlet holes and connected to them via pipes; a slot disposed on the end face and bottom of the overflow pool; and an overflow plate inserted into the slot; wherein the overflow plate is adapted to slide within the slot to adjust the position of the upper end face of the overflow plate.

[0010] Furthermore, a sealing gasket is provided inside the slot.

[0011] Furthermore, one end of the overflow pool is provided with multiple sets of positioning holes that communicate with the slot. The multiple sets of positioning holes are evenly distributed in the vertical direction. The overflow plate is provided with mating holes, and a pin is inserted into the mating holes.

[0012] Furthermore, an adjustment assembly is provided on one side of the overflow plate. The adjustment assembly includes a top plate disposed on one side of the overflow tank. The top plate is fixedly installed with the deep bed filter. An upper seat is fixedly installed on the top plate. Two sets of top bearing seats are fixedly installed on the upper seat. A rotating shaft is installed inside the top bearing seats. A second bevel gear is fixedly installed on the rotating shaft.

[0013] A bracket is fixedly installed on the top plate, and an upper bearing seat is fixedly installed on the bracket. A screw is rotatably installed inside the upper bearing seat. A first bevel gear is fixedly installed at the upper end of the screw. The first bevel gear meshes with a second bevel gear. A connecting plate is threaded onto the screw, and the connecting plate is fixedly installed with the overflow plate.

[0014] Furthermore, two sets of upright plates are fixedly installed at the lower end of the top plate, and a bottom horizontal plate is fixedly installed between the two sets of upright plates. A lower bearing seat is installed on the bottom horizontal plate, and the lower end of the screw is rotatably installed in the lower bearing seat.

[0015] Furthermore, a handwheel is provided on the rotating shaft.

[0016] The beneficial effects of this application are: the air-flushing denitrification deep bed filter provided by this application, by setting the overflow plate in a sliding installation manner, can easily adjust the position of the overflow plate, so that the height of the water inlet of the deep bed filter can be flexibly adjusted according to the position of the wastewater liquid surface, so as to keep the dissolved oxygen concentration carried by the incoming wastewater stable, thereby ensuring the efficiency of the denitrification reaction.

[0017] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is an overall schematic diagram of an air-flushing denitrification deep bed filter according to this application;

[0020] Figure 2 for Figure 1 A partial structural diagram at point A in the middle;

[0021] Figure 3 for Figure 2 Exploded view of the overflow component;

[0022] Figure 4 for Figure 3 Schematic diagram of the partial structure at point B;

[0023] Figure 5 for Figure 4 A schematic diagram of the partial structure at point C;

[0024] The following are the labeling elements in the figure:

[0025] 1. Deep bed filter;

[0026] 2. Water inlet tank; 21. Water inlet hole;

[0027] 3. Overflow pool; 31. Slot; 32. Overflow plate;

[0028] 41. Pin; 42. Positioning hole;

[0029] 51. Top plate; 52. Handwheel; 53. Vertical plate; 54. Bottom horizontal plate; 55. Lower bearing seat; 56. Connecting plate; 57. Bracket; 58. Upper bearing seat; 59. Screw; 510. First bevel gear; 511. Second bevel gear; 512. Top bearing seat. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] like Figures 1-2 As shown, this application provides an air-flushing denitrification deep bed filter, including a deep bed filter 1. The deep bed filter 1 is a reinforced concrete or steel cuboid structure. A multi-layered support layer composed of pebbles is laid at the bottom of the deep bed filter 1. A filter media layer is provided on the upper end of the support layer. The filter media layer is made of homogeneous quartz sand to provide a carrier for denitrifying bacteria to attach to. It has a large specific surface area, so that in an anaerobic environment, the biofilm on the surface of the filter media can reduce nitrate (NO3⁻-N) to nitrogen (N2) and can efficiently retain suspended solids.

[0033] The main function of the support layer is to support the filter media layer and prevent the filter media from being lost. Backwash water flow is distributed on the support layer. At the same time, T-shaped or S-shaped filter brick technology is used, and an air reflection cavity is formed inside the filter brick. During backwashing, air and water are mixed and sprayed out from the gaps between adjacent filter bricks to ensure uniform backwashing without blind spots. The backwashing process is generally divided into three stages: first, the air washing stage to disperse the nitrogen accumulated in the filter layer; second, the air-water combined backwashing stage; and finally, the water rinsing stage to remove residual suspended solids. The backwashing cycle is 24 to 72 hours, which is adjusted according to the influent water quality.

[0034] like Figures 1-2 As shown, an inlet pool 2 is provided on one side of the deep bed filter 1. The inlet pool 2 is used to introduce wastewater into the deep bed filter 1. At the same time, multiple overflow pools 3 are provided in the deep bed filter 1, and multiple inlet holes 21 are provided in the inlet pool 2. The inlet holes 21 are respectively connected to the overflow pools 3, so that the wastewater is introduced into the overflow pools 3 through the inlet pool 2.

[0035] Meanwhile, overflow plates 32 are installed on both sides of the overflow tank 3. The upper end of the overflow plate 32 is the lowest point of the overflow tank 3. Thus, the wastewater entering the overflow tank 3 will first pass over the upper end of the overflow plate 32 and overflow through the upper end of the overflow plate 32, thereby guiding the wastewater into the deep bed filter 1. The wastewater entering the deep bed filter 1 is treated by denitrification reaction.

[0036] The deep bed filter 1 adopts a water inlet method with overflow plates 32 on both sides. The height of the water inlet is usually controlled between 0.1 and 0.2m to ensure that the inlet water does not carry too much dissolved oxygen.

[0037] However, the liquid level in the denitrification deep bed filter will vary with the wastewater treatment process, which will cause fluctuations in the drop height. This will result in large fluctuations in the dissolved oxygen concentration carried by the incoming wastewater, thus affecting the denitrification reaction.

[0038] To solve the above problems, such as Figures 2-3 As shown, the overflow plate 32 on one side is adjusted to a sliding installation method, specifically:

[0039] Slots 31 are provided on both the end face and the bottom of the overflow tank 3. The slots 31 are adapted to the overflow plate 32, so that the overflow plate 32 can slide vertically in the slots 31. It should be noted that a sealing gasket is provided in the slots 31 to seal the contact position between the slots 31 and the overflow plate 32. So that when the overflow plate 32 slides vertically in the slots 31, the wastewater inside the overflow tank 3 will not seep out in large quantities from the contact position.

[0040] Meanwhile, a plurality of positioning holes 42 are provided at one end of the overflow pool 3, which are connected to the slot 31. The plurality of positioning holes 42 are evenly distributed in the vertical direction, and a mating hole (not shown in the figure) is provided on the overflow plate 32. A pin 41 is inserted inside the mating hole. The pin 41 is adapted to pass through the mating hole and be inserted into the positioning hole 42 to fix the overflow plate 32.

[0041] When the height of the water drop fluctuates, the pin 41 can be pulled out, and then the overflow plate 32 can be slid in the slot 31 to adjust the height of the overflow plate 32, so that the distance between the upper end of the overflow plate 32 and the liquid surface in the deep bed filter 1 reaches the preset water drop height.

[0042] After adjustment, insert the pin 41 into the mating hole and place it in the corresponding positioning hole 42 to fix the overflow plate 32 in the new position to adapt to the changing liquid level.

[0043] As another embodiment for adjusting the height position of the overflow plate 32, such as Figures 3-5 As shown, an adjustment assembly is provided on one side of the overflow plate 32. The adjustment assembly includes a top plate 51 provided on one side of the overflow tank 3. The top plate 51 is fixedly installed with the deep bed filter tank 1. At the same time, an upper seat (not shown in the figure) is fixedly installed on the top plate 51. Two sets of top bearing seats 512 are fixedly installed on the upper seat. A rotating shaft (not shown in the figure) is installed in the top bearing seat 512. A second bevel gear 511 is fixedly installed on the rotating shaft. Thus, the rotating shaft is adapted to rotate on the two sets of top bearing seats 512 and drive the second bevel gear 511 to rotate.

[0044] Meanwhile, a bracket 57 is fixedly installed on the top plate 51, and an upper bearing seat 58 is fixedly installed on the bracket 57. A screw 59 is rotatably installed inside the upper bearing seat 58, and a first bevel gear 510 is fixedly installed at the upper end of the screw 59. The first bevel gear 510 meshes with a second bevel gear 511, so that when the second bevel gear 511 rotates, it will drive the screw 59 to rotate through the first bevel gear 510.

[0045] Furthermore, a connecting plate 56 is threaded onto the screw 59. The connecting plate 56 is fixedly installed with the overflow plate 32. Thus, when the screw 59 rotates, it will drive the overflow plate 32 to move in the vertical direction through the connecting plate 56, thereby adjusting the position of the upper end of the overflow plate 32 to achieve the purpose of adjusting the height of the water drop.

[0046] In this embodiment, in order to maintain the stability of the screw 59 rotation, such as Figures 4-5 As shown, two sets of vertical plates 53 are fixedly installed at the lower end of the top plate 51, and a bottom horizontal plate 54 is fixedly installed between the two sets of vertical plates 53. A lower bearing seat 55 is installed on the bottom horizontal plate 54, and the lower end of the screw 59 is rotatably installed in the lower bearing seat 55. Thus, the stability of the screw 59 when rotating is maintained through the cooperation of the lower bearing seat 55 and the top bearing seat 512.

[0047] Furthermore, a handwheel 52 is provided on the rotating shaft to facilitate operation by staff.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air-flushing denitrification deep bed filter, characterized in that: include: Deep bed filter (1); Water inlet pool (2) is provided on one side of the deep bed filter (1) and has at least one set of water inlet holes (21). At least one overflow pool (3) is provided in the deep bed filter (1), and the overflow pool (3) corresponds to the water inlet (21) and is connected by a pipe; Slot (31) is provided on the end face and bottom of the overflow pool (3); An overflow plate (32) is inserted into the slot (31); The overflow plate (32) is adapted to slide within the slot (31) to adjust the position of the upper surface of the overflow plate (32).

2. The air-flushing denitrification deep bed filter according to claim 1, characterized in that: A sealing gasket is provided inside the slot (31).

3. The air-flushing denitrification deep bed filter according to claim 1, characterized in that: One end of the overflow pool (3) is provided with multiple sets of positioning holes (42) that communicate with the slot (31). The multiple sets of positioning holes (42) are evenly distributed in the vertical direction. The overflow plate (32) is provided with a mating hole, and a pin (41) is inserted inside the mating hole.

4. The air-flushing denitrification deep bed filter according to claim 1, characterized in that: An adjustment assembly is provided on one side of the overflow plate (32). The adjustment assembly includes a top plate (51) provided on one side of the overflow tank (3). The top plate (51) is fixedly installed with the deep bed filter (1). An upper seat is fixedly installed on the top plate (51). Two sets of top bearing seats (512) are fixedly installed on the upper seat. A rotating shaft is installed inside the top bearing seat (512). A second bevel gear (511) is fixedly installed on the rotating shaft. A bracket (57) is fixedly installed on the top plate (51), and an upper bearing seat (58) is fixedly installed on the bracket (57). A screw (59) is rotatably installed inside the upper bearing seat (58), and a first bevel gear (510) is fixedly installed at the upper end of the screw (59). The first bevel gear (510) meshes with the second bevel gear (511). A connecting plate (56) is threaded onto the screw (59), and the connecting plate (56) is fixedly installed with the overflow plate (32).

5. The air-flushing denitrification deep bed filter according to claim 4, characterized in that: Two sets of vertical plates (53) are fixedly installed at the lower end of the top plate (51), and a bottom horizontal plate (54) is fixedly installed between the two sets of vertical plates (53). A lower bearing seat (55) is installed on the bottom horizontal plate (54), and the lower end of the screw (59) is rotatably installed in the lower bearing seat (55).

6. The air-flushing denitrification deep bed filter according to claim 5, characterized in that: A handwheel (52) is provided on the rotating shaft.

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