Multistage oxygenation biological aerated filter

Abstract

The utility model discloses a multistage oxygenation biological aerated filter, and relates to the technical field of biological filters. The multistage oxygenating biological aerated filter comprises a filter body, a buffer water distribution area, a filter layer plate, a supporting layer, a filler layer and a water outlet area are sequentially arranged in the filter body from bottom to top, four stages of aeration layers are arranged in the filler layer, each layer comprises an aeration distributor, and the aeration distributor is arranged in the filter layer. The aeration distributor is hermetically connected with an aeration branch pipe, and a plurality of aeration heads are mounted on the aeration branch pipe at equal intervals. In order to overcome the defect that the sewage treatment effect is poor due to the single oxygenation mode of the biological aerated filter, the utility model solves the common problem of non-uniform distribution of dissolved oxygen in the tank by arranging a multi-stage oxygenation structure, meets the consistency of the dissolved oxygen environment at each corner in the tank, and provides a good operation and maintenance environment.

Description

Technical Field

[0001] The utility model relates to the technical field of biological filters, in particular to a multi-stage oxygenated aeration biological filter. Background Art

[0002] The operating and maintenance environment of biological aerated filters (BAFs) has long had a significant impact on their subsequent filtration performance. Because most BAFs utilize a single oxygenation method, dissolved oxygen concentrations within the BAFs are prone to fluctuations, sometimes too high and sometimes too low. This makes it difficult for BAFs to consistently meet operational and maintenance requirements. Consequently, this unstable dissolved oxygen supply poses a long-term challenge to the final effluent quality of wastewater treatment, a constant concern for operations and maintenance personnel.

[0003] Therefore, in order to solve the defect of poor sewage treatment effect caused by the single oxygenation method of the aerated biological filter, it is necessary to propose a multi-stage oxygenated aerated biological filter. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-stage oxygenated aerated biological filter, which solves the common problem of uneven dissolved oxygen distribution in the pool by arranging a multi-stage oxygenation structure, meets the requirement of consistent dissolved oxygen environment in every corner of the pool, and provides a good operation and maintenance environment.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A multi-stage oxygenated aerated biological filter, comprising a tank body, wherein the tank body is provided with a buffer water distribution area, a filter layer plate, a support layer, a filler layer and a water outlet area in order from bottom to top; a multi-stage aeration layer is provided in the filler layer, and the multi-stage aeration layer has four layers, each layer including an aeration distributor, the aeration distributor is sealedly connected to an aeration branch pipe, and a plurality of aeration heads are equidistantly installed on the aeration branch pipe;

[0007] The aeration distributor is fixed to the inner wall of the tank body through a bracket. An aeration main pipe is also fixed to the inner wall of the tank body through a bracket. The aeration main pipe is sealed with the aeration distributor, and its air inlet extends upward and out of the packing layer.

[0008] Preferably, the filter plate is fixed to the inner wall of the pool body through a bracket, and a long-handled filter head is installed in the filter plate. The bottom end of the long-handled filter head extends into the buffer water distribution area, and the top end extends into the supporting layer.

[0009] Preferably, one side of the buffer water distribution area is sealedly connected to a sewage inlet pipe and a backwash inlet pipe, and the other side thereof is sealedly connected to a backwash air inlet pipe.

[0010] Preferably, the side end of the water outlet area is sealed and connected with a clean water outlet pipe and a backwash outlet pipe.

[0011] Preferably, pebbles with a particle size of 16 to 32 mm are laid in the supporting layer, and ceramsite with a particle size of 4 to 6 mm is laid in the filling layer.

[0012] Preferably, the aeration distributor is equipped with a support rod and a bracket for fixing the aeration branch pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This multi-stage oxygenated aerated biological filter, through the setting of multi-stage aeration layers, enables air to be distributed to the aeration branch pipes through the aeration distributor, and then the gas is released into the interior of the tank through multiple aeration heads for the survival of microorganisms, thereby realizing the subdivision of the aeration layer and providing multiple oxygen supply ports to evenly distribute the dissolved oxygen in the tank body, ensuring a consistent dissolved oxygen environment in every corner of the tank body, without generating an anaerobic environment, ensuring the stability of the dissolved oxygen in each filter material layer in the later stage, and providing a good operation and maintenance environment for the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the biological aerated filter of the present utility model;

[0016] Figure 2 This is a schematic diagram of the multi-stage aeration layer structure of the utility model.

[0017] In the figure: 1. Tank body; 2. Multi-stage aeration layer; 3. Aeration branch pipe; 4. Bracket; 5. Long-handled filter head; 6. Aeration main pipe; 7. Aeration distributor; 71. Support rod; 8. Aeration head; 9. Buffer water distribution area; 10. Filter plate; 11. Support layer; 12. Filling layer; 13. Water outlet area; 14. Sewage inlet pipe; 15. Backwash inlet pipe; 16. Clean water outlet pipe; 17. Backwash outlet pipe; 18. Backwash inlet pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] To solve the technical problem of how to achieve multi-stage oxygenation in the filter, please refer to Figure 1-Figure 2 , this embodiment provides the following technical solutions:

[0020] A multi-stage oxygenated aerated biological filter comprises a tank body 1. A buffer water distribution area 9, a filter layer plate 10, a supporting layer 11, a filler layer 12 and a water outlet area 13 are sequentially arranged in the tank body 1 from bottom to top. A multi-stage aeration layer 2 is arranged in the filler layer 12. The multi-stage aeration layer 2 has four layers, each of which contains an aeration distributor 7. The aeration distributor 7 is sealedly connected to an aeration branch pipe 3, and a plurality of aeration heads 8 are equidistantly installed on the aeration branch pipe 3.

[0021] The aeration distributor 7 is fixed to the inner wall of the tank body 1 through the bracket 4. The inner wall of the tank body 1 is also fixed with an aeration main pipe 6 through the bracket 4. The aeration main pipe 6 is sealed to the aeration distributor 7, and its air inlet extends upward and out of the packing layer 12.

[0022] Among them, the aeration distributor 7 is equipped with a support rod 71 and a bracket 4 for fixing the aeration branch pipe 3. Since the aeration branch pipe 3 will vibrate when compressed air is transported to the aeration branch pipe 3, the aeration branch pipe 3 is fixed by the support rod 71 and the bracket 4, which effectively reduces the vibration of the aeration branch pipe 3, enhances the stability of the aeration system, and prevents the aeration branch pipe 3 from being displaced or damaged due to vibration.

[0023] Specifically, the aeration main pipe 6 is sealed and connected to the aeration fan. The compressed air generated by the aeration fan is transported to the aeration distributor 7 through the multi-stage aeration layer 2, and then distributed to each aeration branch pipe 3 through the aeration distributor 7. Finally, the gas is exposed to the tank body 1 through the aeration head 8. The aeration head 8 releases the air in the form of tiny bubbles, increasing the gas-liquid contact area, improving the oxygen transfer efficiency, ensuring that the dissolved oxygen environment in each corner of the tank body 1 is consistent, avoiding fluctuations in the dissolved oxygen concentration, providing sufficient dissolved oxygen for microorganisms to utilize, and promoting the microbial degradation process.

[0024] To solve the technical problem of how to achieve sewage filtration in filter tanks, please refer to Figure 1-Figure 2 , this embodiment provides the following technical solutions:

[0025] The supporting layer 11 is paved with pebbles with a particle size of 16 to 32 mm, the packing layer 12 is paved with ceramsite with a particle size of 4 to 6 mm, the filter layer plate 10 is fixed to the inner wall of the pool body 1 through the bracket 4, and a long-handled filter head 5 is installed in the filter layer plate 10. The bottom end of the long-handled filter head 5 extends into the buffer water distribution area 9, and the top end thereof extends into the supporting layer 11.

[0026] One side of the buffer water distribution area 9 is sealedly connected to the sewage inlet pipe 14 and the backwash inlet pipe 15, and the other side is sealedly connected to the backwash air inlet pipe 18. The side end of the water outlet area 13 is sealedly connected to the clean water outlet pipe 16 and the backwash outlet pipe 17.

[0027] Among them, valve bodies are installed on the sewage inlet pipe 14, the backwash inlet pipe 15, the clean water outlet pipe 16, the backwash outlet pipe 17 and the backwash air inlet pipe 18 to facilitate the control of water inlet and water outlet.

[0028] Specifically, sewage is poured into the buffer water distribution area 9 through the sewage inlet pipe 14, and the sewage enters the supporting layer 11 through multiple long-handled filter heads 5, which optimizes the distribution of water flow. The pebbles laid in the supporting layer 11 provide good support for the packing layer 12 and have a preliminary filtering effect on the sewage, which can intercept larger suspended matter and impurities. The sewage passes through the supporting layer 11 and then enters the packing layer 12. The packing layer 12 is conducive to the attachment and growth of microorganisms. The ceramsite layer can further intercept and adsorb organic matter and microorganisms in the sewage. Combined with the supplement of oxygen, the biodegradation ability is enhanced. The filtered clean water is discharged through the clean water outlet pipe 16;

[0029] When the tank body 1 needs to be backwashed, backwash water and air are provided through the backwash water inlet pipe 15 and the backwash air inlet pipe 18 to remove sludge and microorganisms on the filler layer 12 and the supporting layer 11 and restore the filtering performance of the tank body 1.

[0030] Working principle: When oxygenation is required in this multi-stage oxygenated aerated biological filter, the aeration main pipe 6 is sealed and connected to the aeration fan. The compressed air generated by the aeration fan is transported to the aeration distributor 7 through the multi-stage aeration layer 2, and then distributed to each aeration branch pipe 3 through the aeration distributor 7. Finally, the gas is released into the tank body 1 through the aeration head 8. The aeration head 8 releases the air in the form of tiny bubbles, increasing the gas-liquid contact area, improving the oxygen transfer efficiency, ensuring that the dissolved oxygen environment in every corner of the tank body 1 is consistent, avoiding fluctuations in the dissolved oxygen concentration, providing sufficient dissolved oxygen for microorganisms to utilize, promoting the microbial degradation process, and thereby improving the sewage filtration effect.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage oxygenated aerated biological filter, comprising a tank body (1), wherein the tank body (1) is provided with a buffer water distribution area (9), a filter layer plate (10), a supporting layer (11), a filler layer (12) and a water outlet area (13) in order from bottom to top, characterized in that: A multi-stage aeration layer (2) is laid in the packing layer (12), the multi-stage aeration layer (2) has four layers, each layer contains an aeration distributor (7), the aeration distributor (7) is sealedly connected to an aeration branch pipe (3), and a plurality of aeration heads (8) are evenly installed on the aeration branch pipe (3); The aeration distributor (7) is fixed to the inner wall of the tank body (1) via a bracket (4), and an aeration main pipe (6) is also fixed to the inner wall of the tank body (1) via the bracket (4). The aeration main pipe (6) is sealedly connected to the aeration distributor (7), and its air inlet extends upward and extends out of the packing layer (12).

2. The multi-stage oxygenated biological aeration filter according to claim 1, characterized in that: The filter plate (10) is fixed to the inner wall of the tank body (1) via a bracket (4). A long-handled filter head (5) is installed in the filter plate (10). The bottom end of the long-handled filter head (5) extends into the buffer water distribution area (9), and the top end extends into the supporting layer (11).

3. The multi-stage oxygenated biological aeration filter according to claim 1, characterized in that: One side of the buffer water distribution area (9) is sealedly connected to a sewage inlet pipe (14) and a backwash inlet pipe (15), and the other side is sealedly connected to a backwash air inlet pipe (18).

4. The multi-stage oxygenated biological aeration filter according to claim 1, characterized in that: The side ends of the water outlet area (13) are sealedly connected to a clean water outlet pipe (16) and a backwash outlet pipe (17).

5. The multi-stage oxygenated biological aeration filter according to claim 1, characterized in that: The supporting layer (11) is paved with pebbles with a particle size of 16 to 32 mm, and the filler layer (12) is paved with ceramsite with a particle size of 4 to 6 mm.

6. The multi-stage oxygenated biological aeration filter according to claim 1, characterized in that: The aeration distributor (7) is provided with a support rod (71) and a bracket (4) for fixing the aeration branch pipe (3).

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