Three-dimensional integrated biofilter

Abstract

The present application provides a kind of three-dimensional integrated biological filter bed, it solves the problems of traditional biological filler, such as small specific surface area, low carrier utilization, carrier easy to block and bond, slow biofilm formation speed and small biofilm formation amount. The present application comprises a base and an outer frame fixedly arranged on the base, a filler pile is arranged in the outer frame, the filler pile fills the inner part of the outer frame, the filler pile is composed of a plurality of porous net tubes, adjacent porous net tubes are fixed by thermal physical bonding, the outer frame is arranged on the base composed of multiple layers of fillers, and the filler pile composed of porous net tubes is used for biological purification of sewage, the water flow direction in the outer frame is from top to bottom, the flowing sewage passes through multiple filler piles from top to bottom for multiple times of purification, and the purification effect is good.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a three-dimensional integrated biological filter bed. Background Technology

[0002] Biofilm technology, as a highly efficient water treatment process, has achieved widespread success in the treatment of organic wastewater. Its key technology is the application of biological packing materials suitable for microbial attachment and growth. The application of different types of biological packing materials has led to different categories of biofilm reactors, including traditional biofilters, rotating biological disc aerated biofilters, biological fluidized beds, and biological contact oxidation tanks.

[0003] Among numerous biofilm reaction processes, biological contact oxidation is a biological treatment technology that falls between activated sludge and biofilters. It combines the characteristics of activated sludge with the advantages of both, making it highly valued by water treatment engineers and the most widely used in the field of organic wastewater treatment. The essence of biological contact oxidation is that the reaction tank is filled with packing material, and oxygenated wastewater completely submerges the packing material, flowing through it at a certain flow rate. A biofilm forms on the packing material, allowing extensive contact between the wastewater and the biofilm. Through the metabolism of microorganisms on the biofilm, organic matter in the wastewater is removed, and the wastewater is purified. Therefore, biological contact oxidation treatment technology is also known as submerged biological filter technology.

[0004] Biological contact oxidation processes typically utilize biological packing materials, including tubular packing, corrugated plate packing, or soft fiber bundle packing. Engineering applications show that traditional biological packing materials generally suffer from drawbacks such as small specific surface area, low carrier utilization, easy clogging and adhesion of the carrier, slow biofilm formation rate, and low biofilm quantity. Traditional biological carriers also limit mass transfer between the liquid, gas, and solid phases within the reaction tank, resulting in low water flow turbulence. Consequently, the treatment efficiency of biological contact oxidation processes is low, and existing technologies have room for improvement. Summary of the Invention

[0005] The present invention addresses the aforementioned existing conditions by providing a three-dimensional integrated biological filter bed, characterized by comprising a base and an outer frame fixedly mounted on the base. The outer frame is covered with air holes communicating with the interior of the frame. The upper end of the outer frame communicates with the outside. A packing material stack is disposed inside the outer frame, filling the interior of the outer frame. A water inlet pipe is disposed on the outer frame, with one end of the water inlet pipe located at the lower end of the outer wall of the outer frame and the other end of the water inlet pipe located at the upper end of the outer frame. The packing material stack is composed of multiple porous mesh tubes, which are fixed together by thermophysical bonding. The length direction of the porous mesh tubes extends horizontally.

[0006] Preferably, the base includes a first pad, a second pad, and a third pad arranged sequentially from bottom to top. The first pad is a thick crushed stone pad, the second pad is a concrete pad, and the third pad is a concrete pad.

[0007] Preferably, the upper end of the second pad layer is fixedly provided with a retaining edge that surrounds the outer periphery of the third pad layer. The retaining edge and the third pad layer are spaced apart and form a groove for drainage.

[0008] Preferably, a cover plate is fastened to the top of the groove.

[0009] Preferably, a hollow mounting post is fixedly installed at each of the four corners of the packing pile, and a positioning block is fixedly installed at the upper end of the mounting post for engaging with the lower end of the mounting post of the adjacent packing pile above.

[0010] Preferably, a hanging rod is fixedly installed at the lower end of the mounting column, and a hook for hooking onto the hanging rod inside the adjacent packing pile mounting column is fixedly installed at the upper end of the positioning block. The center of the upper end of the hook is located on the side of the hanging rod inside the mounting column away from the packing pile.

[0011] Preferably, the two ends of the packing pile are respectively fixedly provided with grid plates for fastening to the two ends of the porous mesh tube. The grid plate has a plurality of mounting holes facing the porous mesh tube. The mounting holes correspond one-to-one with the porous mesh tube. A plurality of packing rods for inserting into the porous mesh tube are provided between the two grid plates. The plurality of packing rods are arranged sequentially at intervals on the grid plates.

[0012] Preferably, the mounting post has multiple slots, and the grille plate has multiple protrusions for engaging with the slots.

[0013] Preferably, a material rack for stacking the filler pile is provided inside the outer frame, and the filler pile is placed on the material rack, with a gap between the outer side of the material rack and the outer frame.

[0014] Compared with the prior art, in this invention, the outer frame is set on a base composed of multiple layers of packing material, and the wastewater is biologically purified by packing material piles composed of porous mesh pipes. The water flow direction inside the outer frame is from top to bottom, and the flowing wastewater passes through multiple packing material piles from top to bottom for multiple purifications, resulting in a better purification effect. Attached Figure Description

[0015] Figure 1 This is an overall structural view of Example 1;

[0016] Figure 2 This is a cross-sectional view of Example 1;

[0017] Figure 3This is a schematic diagram of the packing material stack.

[0018] Figure 4 This is a structural diagram of a porous mesh pipe and its mounting column;

[0019] Figure 5 This is a schematic diagram of the grating plate structure;

[0020] Figure 6 This is a sectional view of the mounting column.

[0021] Figure 7 This is a schematic diagram of the structure of Example 2.

[0022] The markings in the diagram are: 1. Base; 2. Outer frame; 3. Packing material stack; 4. Third pad layer; 5. Edge retainer; 6. Groove; 7. Cover plate; 8. Inlet pipe; 9. Perforated mesh pipe; 10. Mounting column; 11. Positioning block; 12. Hanging rod; 13. Hook; 14. Grating plate; 15. Mounting hole; 16. Packing rod; 17. Slot; 18. Protrusion; 19. First pad layer; 20. Second pad layer; 21. Material rack; 22. Air hole. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0024] Example 1

[0025] like Figure 1-6As shown, a three-dimensional integrated biological filter bed is located between an equalization tank and an observation well. It includes a base 1 and an outer frame 2 fixedly mounted on the base 1. The outer frame 2 is covered with air holes 22 connecting to its interior, allowing air intake. Rapid water flow ensures sufficient air for reaction. The outer frame 2 is made of aluminum alloy, with its upper end connected to the outside. A packing material pile 3 is installed inside the outer frame 2, filling the interior. A gap exists between the outermost packing material pile 3 and the outer frame 2. The base 1 includes a first cushion layer 19, a second cushion layer 20, and a third cushion layer 4, arranged sequentially from bottom to top. The first cushion layer 19 is a thick crushed stone cushion layer, the second cushion layer 20 is a C25 reinforced concrete cast-in-place molding layer, and the third cushion layer 4 is a C30 plain concrete cushion layer. A retaining edge 5 is fixedly provided at the upper end of the second cushion layer 20, surrounding the outer perimeter of the third cushion layer 4. A gap is left between the retaining edge 5 and the third cushion layer 4, forming a drainage groove 6. A cover plate 7 is fastened above the groove 6. A water inlet pipe 8 is provided on the outer frame 2. One end of the water inlet pipe 8 is located at the lower end of the outer wall of the outer frame 2, and the other end of the water inlet pipe 8 is located above the outer frame 2, discharging water via spraying. The packing material pile 3 consists of multiple porous mesh tubes 9, which are fixed together by thermophysical bonding. The length of the porous mesh tubes 9 extends horizontally, allowing for the attachment of biological agents for purification. The attachment area is large, resulting in a greater number of biological agents per unit area. By setting the outer frame 2 on the base 1 composed of multiple layers of packing material, and by using the packing material pile 3 composed of porous mesh pipes 9 to carry out biological purification of sewage, the water flow direction inside the outer frame 2 is from top to bottom, and the flowing sewage passes through multiple packing material piles 3 from top to bottom for multiple purifications, resulting in a good purification effect.

[0026] A hollow mounting post 10 is fixedly installed at each of the four corners of the packing pile 3. A positioning block 11 is fixedly installed at the upper end of the mounting post 10 for engaging with the lower end of the mounting post 10 of the adjacent packing pile 3 above. A hanging rod 12 is fixedly installed at the lower end of the mounting post 10. A hook 13 is fixedly installed at the upper end of the positioning block 11 for engaging with the hanging rod 12 inside the adjacent packing pile 3 mounting post 10. The center of the upper end of the hook 13 is located on the side of the hanging rod 12 inside the mounting post 10 away from the packing pile 3. When placing the packing pile 3, it is placed sequentially in the vertical direction. The positioning block 11 is inserted at the lower end of the upper mounting column 10. During installation, the main body of the hook 13 is located on one side of the hanging rod 12, and the front end of the hook 13 is located directly below the hanging rod 12. During placement, the hanging rod 12 presses against the upper end of the hook 13 and drives the hook 13 to deform and bend to one side of the hanging rod 12. The hanging rod 12 continues to move downward until it moves below the hanging rod 12. The hook 13 deforms and resets, and is located directly above the hanging rod 12. When it is necessary to replace the packing pile 3, the uppermost packing pile 3 is directly taken out upward. During the upward movement, the hook 13 directly engages with the hanging rod 12, completing the connection between adjacent packing piles 3 in the vertical direction. The entire row of packing piles 3 in the vertical direction can then be taken out, making replacement relatively convenient.

[0027] The filler pile 3 has grid plates 14 fixedly installed at both ends for engaging with the porous mesh tube 9. Each grid plate 14 has multiple mounting holes 15 facing the porous mesh tube 9, with each hole corresponding to a different tube. Multiple filler rods 16 are inserted into the porous mesh tube 9 between two grid plates 14, with the filler rods 16 spaced apart on the grid plates 14. Each mounting post 10 has multiple slots 17, and each grid plate 14 has multiple protrusions 18 for engaging within these slots 17. The mating protrusions 18 and slots 17 facilitate rapid positioning and installation. Filling the filler rods 16 with stones or metal further enhances purification and increases the biofilm adhesion area, resulting in better purification.

[0028] Example 2

[0029] The difference from Example 1 is that, as Figure 7 As shown, a material rack 21 for stacking the aforementioned filler pile 3 is provided inside the outer frame 2. The aforementioned filler pile 3 is placed on the material rack 21, and a gap is left between the outer side of the material rack 21 and the aforementioned outer frame 2.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A three-dimensional integrated biofilter bed, characterized in that, The system includes a base (1) and an outer frame (2) fixedly mounted on the base (1). The outer frame (2) is covered with air holes (22) that connect to the interior of the outer frame (2). The upper end of the outer frame (2) is connected to the outside. A packing pile (3) is provided inside the outer frame (2). The packing pile (3) covers the interior of the outer frame (2). A water inlet pipe (8) is provided on the outer frame (2). One end of the water inlet pipe (8) is located at the lower end of the outer wall of the outer frame (2), and the other end of the water outlet pipe (9) is located above the outer frame (2). The packing pile (3) is composed of multiple porous mesh pipes (9). Adjacent porous mesh pipes (9) are fixed by thermophysical bonding. The length of the porous mesh pipe (9) extends horizontally. A hollow mounting post (10) is fixedly mounted at each of the four corners of the packing pile (3). A device for snapping onto the adjacent packing pile above is fixedly mounted at the upper end of the mounting post (10). 3) Positioning block (11) at the lower end of the mounting column (10); a hanging rod (12) is fixedly installed at the lower end of the mounting column (10), and a hook (13) is fixedly installed at the upper end of the positioning block (11) for hanging on the hanging rod (12) in the mounting column (10) of the adjacent packing pile (3). The center of the upper end of the hook (13) is located on the side of the hanging rod (12) in the mounting column (10) away from the packing pile (3). The two ends of the packing pile (3) are respectively fixedly provided with grid plates (14) for fastening to the two ends of the above-mentioned porous mesh tube (9). The grid plates (14) are provided with multiple mounting holes (15) facing the above-mentioned porous mesh tube (9). The mounting holes (15) correspond one-to-one with the porous mesh tube (9). Multiple packing rods (16) for inserting into the above-mentioned porous mesh tube (9) are provided between the two grid plates (14). The multiple packing rods (16) are arranged sequentially at intervals on the grid plates (14).

2. The three-dimensional integrated biofilter bed according to claim 1, characterized in that, The base (1) includes a first pad (19), a second pad (20) and a third pad (4) arranged sequentially from bottom to top. The first pad (19) is a thick crushed stone pad, the second pad (20) is a concrete pad, and the third pad (4) is a concrete pad.

3. The three-dimensional integrated biofilter bed according to claim 2, characterized in that, The upper end of the second pad (20) is fixedly provided with a retaining edge (5) that surrounds the outer periphery of the third pad (4). The retaining edge (5) and the third pad (4) are spaced apart and form a ditch (6) for drainage.

4. The three-dimensional integrated biofilter bed according to claim 3, characterized in that, A cover plate (7) is fastened above the groove (6).

5. A three-dimensional integrated biofilter bed according to claim 1, characterized in that, The mounting post (10) has multiple slots (17), and the grid plate (14) has multiple protrusions (18) for engaging in the slots (17).

6. A three-dimensional integrated biofilter bed according to claim 1, characterized in that, The outer frame (2) is provided with a material rack (21) for stacking the above-mentioned filler pile (3). The above-mentioned filler pile (3) is placed on the material rack (21), and there is a gap between the outer side of the material rack (21) and the outer frame (2).

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