Up-flow biological filter with multiple backwashing modes
By using an upflow biological filter with multiple backwashing modes, combining forward and backwashing methods, and utilizing gravity inlet and air washing, the high power and investment costs of existing technologies are solved, achieving efficient and energy-saving wastewater treatment.
Patent Information
- Application Number
- CN202423093404.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing biological filter backwashing methods consume power and electricity, require the installation of a clear water tank, increase investment costs, and have limited backwashing options.
The upflow biological filter with multiple backwashing modes utilizes both forward and backwashing modes, combining gravity inlet and air washing, eliminating the need for backwash pumps and clear water tanks, and enabling flexible adjustment of washing intensity.
It requires no electricity, saves investment costs, enables flexible flushing modes, and improves the operating efficiency and water purification effect of the biological filter.
Smart Images
Figure CN223547834U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biological filter technology, specifically to an upflow biological filter with multiple backwashing modes. Background Technology
[0002] As the core unit of wastewater treatment, biological filters are an important measure to ensure effluent quality. They can effectively reduce the content of pollutants such as organic matter and ammonia nitrogen, intercept suspended solids (SS), and purify water. They have advantages such as high treatment efficiency, small footprint, and convenient operation and management. As the filter operates normally, the amount of intercepted substances increases, the biofilm thickens to a certain extent and begins to detach, the porosity between filter media decreases, the mass transfer rate slows down, the head loss increases, and the effluent quality deteriorates. At this time, it is necessary to stop operation and perform backwashing. Currently, the commonly used backwashing method is: air washing - combined air and water washing - water washing. To avoid excessive backwashing, which can cause filter media wear and slow biofilm microbial recovery, the backwashing cycle is determined according to the filter structure and the types of microorganisms.
[0003] Traditional backwashing methods are mostly upflow, which first involves air backwashing to loosen the filter media layer and cause it to expand. Then, air and water backwashing is used to flush out suspended solids and aged microbial membranes trapped in the filter media layer. Finally, water washing removes these impurities. This method requires a backwash pump and a backwash blower, has a single backwashing method, consumes electricity, and requires a clear water tank, thus increasing investment costs. Therefore, we propose an upflow biological filter with multiple backwashing modes. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an upflow biological filter with multiple backwashing modes, which can solve the problems of power consumption, electricity and investment in the original backwashing method, and the need to set up a clear water tank. It can effectively solve the problems in the background technology.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an upflow biological filter with multiple backwashing modes, comprising an upflow biological filter body, a pipe gallery on the right side of the upflow biological filter body, a wastewater tank on the right side of the pipe gallery, an aeration air pipe and a flushing air pipe installed on the left side inside the upflow biological filter body, an aeration air valve installed on the circumferential surface of the aeration air pipe, a flushing air valve installed on the circumferential surface of the flushing air pipe, a uniformly distributed effluent channel and water channel at the upper end of the upflow biological filter body, a forward wash inlet gate installed at the right end of all water channels, a main effluent channel and a secondary effluent channel at the upper end of the pipe gallery, the secondary effluent channel being located to the left of the main effluent channel, a backwash inlet pipe installed inside the outlet of the secondary effluent channel, a backwash inlet valve installed on the circumferential surface of the backwash inlet pipe, and the effluent... Above the branch channels and the main inlet channel, there are evenly distributed inlet channels and main inlet channels. All inlet channels are located on the left side of the main inlet channel. An inlet pipe is fixed inside the drain outlet below each inlet channel, and an inlet valve is installed on the circumference of the inlet pipe. A backwash drain pipe is fixed inside the drain outlet on the lower side of each channel, and a backwash drain valve is installed on the circumference of the backwash drain pipe. The right end of the backwash drain pipe is connected to the wastewater tank. A forward wash drain pipe is fixed at the lower end inside the pipe gallery, and its right end is connected to the wastewater tank. An opening is provided at the left end of the pipe gallery, and the left end of the forward wash drain pipe is fixed inside the opening. A forward wash drain valve is installed on the circumference of the forward wash drain pipe. By setting the forward wash drain valve, the liquid level in the upflow biological filter can be changed by adjusting the opening degree of the forward wash drain valve in forward wash mode, thereby changing the flushing intensity.
[0006] Furthermore, the outlet channels and water channels are distributed alternately.
[0007] Furthermore, the left end of the inlet pipe is fixed inside the pipe gallery on the left side, and the inlet pipe is connected to the inner cavity of the upflow biological filter body.
[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: This multi-backwashing upflow biological filter has the following advantages:
[0009] The entire backwashing process of this device relies on gravity-fed water intake, eliminating the need for a backwash water pump and consuming no electricity, thus saving energy and reducing consumption. It can achieve both forward and backwashing modes, which can be flexibly combined and used. In forward wash mode, the liquid level in the upflow biological filter can be changed by adjusting the opening degree of the forward wash drain valve, thereby changing the washing intensity. There is no need to set up a clear water tank, saving investment costs. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0011] Figure 2 This is a top view of the present invention.
[0012] In the diagram: 1. Upflow biological filter body, 2. Pipe gallery, 3. Wastewater tank, 4. Aeration air valve, 5. Aeration air pipe, 6. Flushing air valve, 7. Flushing air pipe, 8. Outlet channel, 9. Water channel, 10. Forward wash inlet gate, 11. Outlet water channel, 12. Backwash inlet pipe, 13. Backwash inlet valve, 14. Inlet water channel, 15. Main inlet channel, 16. Main outlet channel, 17. Backwash drain valve, 18. Backwash drain pipe, 19. Inlet pipe, 20. Inlet valve, 21. Forward wash drain valve, 22. Forward wash drain pipe. Detailed Implementation
[0013] 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.
[0014] Please see Figure 1-2This embodiment provides a technical solution: a multi-backwashing upflow biological filter, including an upflow biological filter body 1, a pipe gallery 2 on the right side of the upflow biological filter body 1, a wastewater tank 3 on the right side of the pipe gallery 2, an aeration air pipe 5 and a flushing air pipe 7 installed on the left side inside the upflow biological filter body 1, an aeration air valve 4 installed on the circumferential surface of the aeration air pipe 5, and a flushing air valve 6 installed on the circumferential surface of the flushing air pipe 7, and a uniformly spaced... The system includes distributed outlet channels 8 and 9. Each channel 9 has a forward wash inlet gate 10 installed at its right end. Inside the pipe gallery 2, at the upper end, there is a main outlet channel 16 and a secondary outlet channel 11. The secondary outlet channel 11 is located to the left of the main outlet channel 16. Below the secondary outlet channel 11, an outlet port is fitted with a backwash inlet pipe 12. A backwash inlet valve 13 is installed on the circumference of the backwash inlet pipe 12. Above the secondary outlet channel 11 and the main outlet channel 16, there are evenly distributed inlet channels 14 and a main inlet channel 15. The inlet channels 14 are all located to the left of the main inlet channel 15. An inlet pipe 19 is fixed inside the drain outlet located below the inlet channel 14. An inlet valve 20 is installed on the circumference of the inlet pipe 19. A backwash drain pipe 18 is fixed inside the drain outlet located on the lower side of the channel 9. A backwash drain valve 17 is installed on the circumference of the backwash drain pipe 18. The right end of the backwash drain pipe 18 is connected to the wastewater tank 3. A forward wash drain pipe 22 is fixed inside the lower end of the pipe gallery 2. The right end of the forward wash drain pipe 22 is connected to the wastewater tank 3. An opening is provided at the left end of 2, and the left end of the forward wash drain pipe 22 is fixed inside the opening. A forward wash drain valve 21 is installed on the circumference of the forward wash drain pipe 22. The outlet channel 8 and the water channel 9 are distributed alternately. The left end of the inlet pipe 19 is fixed inside the pipe gallery 2 on the left side. The inlet pipe 19 is connected to the inner cavity of the upflow biological filter body 1. By setting the forward wash drain valve 21, the liquid level height inside the upflow biological filter body 1 can be changed by adjusting the opening degree of the forward wash drain valve 21 in the forward wash mode, thereby changing the flushing intensity.
[0015] The working principle of the upflow biological filter with multiple backwashing modes provided by this utility model is as follows: During forward flushing, the forward flushing inlet gate 10 and the forward flushing outlet valve 21 are opened, and all other valves are closed. Water from the upflow biological filter body 1 is evenly distributed through the forward flushing inlet channel 9, with the water flow direction from top to bottom. The forward flushing outlet flows to the wastewater tank 3 through the bottom forward flushing outlet pipe 22. During backwashing, the backwashing inlet valve 13, the backwashing outlet valve 17, and the flushing air valve 6 are opened, and all other valves are closed. Water from the upflow biological filter body 1 flows out from the outlet channel 11, enters the bottom of the upflow biological filter body 1 through the backwashing inlet pipe 12 for backwashing, and the backwashing outlet flows to the wastewater tank 3 through the top backwashing outlet pipe 18. During air flushing, the flushing air valve 6 is opened normally.
[0016] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A multi-backwashing upflow biological filter, characterized in that: The system includes an upflow biological filter body (1), a pipe gallery (2) on the right side of the upflow biological filter body (1), a wastewater tank (3) on the right side of the pipe gallery (2), an aeration air pipe (5) and a flushing air pipe (7) installed on the left side inside the upflow biological filter body (1), an aeration air valve (4) installed on the circumferential surface of the aeration air pipe (5), and a flushing air valve (6) installed on the circumferential surface of the flushing air pipe (7). The upper part of the pipe gallery (2) is provided with evenly distributed outlet channels (8) and water channels (9). All water channels (9) are equipped with a front-wash inlet gate (10) at the right end. The upper part of the pipe gallery (2) is provided with a main outlet channel (16) and an outlet branch channel (11). The outlet branch channel (11) is located to the left of the main outlet channel (16). The outlet of the outlet branch channel (11) is provided below the outlet and is equipped with a backwash inlet pipe (12). A backwash inlet valve is installed on the circumference of the backwash inlet pipe (12). 13) Above the outlet channel (11) and the main outlet channel (16), there are evenly distributed inlet channels (14) and main inlet channels (15). All inlet channels (14) are located on the left side of the main inlet channel (15). The drain outlet below the inlet channel (14) is fixed with an inlet pipe (19). An inlet valve (20) is installed on the circumference of the inlet pipe (19). The drain outlet on the lower side of the channel (9) is fixed with a backwash drain pipe (18). A backwash drain valve (17) is installed on the circumferential surface of the backwash drain pipe (18). The right end of the backwash drain pipe (18) is connected to the wastewater tank (3). A forward wash drain pipe (22) is fixed at the lower end inside the pipe gallery (2). The right end of the forward wash drain pipe (22) is connected to the wastewater tank (3). An opening is provided at the left end of the pipe gallery (2). The left end of the forward wash drain pipe (22) is fixed inside the opening. A forward wash drain valve (21) is installed on the circumferential surface of the forward wash drain pipe (22).
2. The upflow biological filter with multiple backwashing modes according to claim 1, characterized in that: The outlet channel (8) and the water channel (9) are interspersed.
3. The upflow biological filter with multiple backwashing modes according to claim 1, characterized in that: The left end of the inlet pipe (19) is fixed inside the pipe gallery (2) on the left side, and the inlet pipe (19) is connected to the inner cavity of the upflow biological filter body (1).