A helical MBBR packing structure

Abstract

The utility model relates to a spiral MBBR filler structure belongs to the municipal sewage, aquaculture circulating water and its tail water biological treatment technical field. The utility model discloses a shell and a biofilm formation structure, the biofilm formation structure sets up on the shell, and its structural characteristics lie in: the biofilm formation hole is formed between the shell and the biofilm formation structure, the shell presents spiral structure and sets, and the both ends of this spiral MBBR filler structure present plane or present S shape structure and set, the section of shell presents arc or wave shape structure and sets, the biofilm formation structure includes the biofilm formation board and the biofilm formation strip, the quantity of the biofilm formation board is multiple, and one end of multiple biofilm formation boards is connected with each other, and the other end of multiple biofilm formation boards all is connected with the inner wall of shell, and the inner wall or the outer wall of shell is provided with the biofilm formation strip.

Description

Technical Field

[0001] This utility model relates to a spiral MBBR packing structure, belonging to the field of biological treatment technology for municipal sewage, industrial wastewater, aquaculture circulating water and its tailwater. Background Technology

[0002] Biological packing materials for wastewater treatment, also known as biofilm carriers, are polymeric materials used in wastewater treatment as carriers for microbial biofilm formation. Existing MBBR packing materials suffer from problems such as low effective specific surface area, difficulty in biofilm formation, and low mass transfer efficiency in practical applications. When used to treat municipal wastewater, industrial wastewater, aquaculture circulating water, and their effluent, they are prone to low denitrification efficiency and nitrite accumulation. In recent decades, various packing materials have been developed and widely used in wastewater treatment, such as packing material K5 (reference document 1, DOI: 10.2166 / wpt.2014.025) and packing material K1 (reference document 2, patent number: EP0575314 B1). However, these packing materials are prone to clogging of biofilm formation pores and packing material settling at the bottom, severely affecting the mass transfer rate of pollutants from wastewater to the biofilm attached to the packing surface and the pollutant removal efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings in the existing technology and to provide a spiral MBBR packing structure with a reasonable structural design.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: the spiral MBBR packing structure includes a shell and a membrane attachment structure. The membrane attachment structure is disposed on the shell, and its structural feature is that a membrane attachment hole is formed between the shell and the membrane attachment structure, and the outer wall of the shell is arranged in a spiral shape. Non-planar structures such as S-shaped and W-shaped structures, arc-shaped structures such as circular and elliptical structures, and polygonal structures such as triangular and quadrilateral structures are also possible.

[0005] Furthermore, the two ends of the spiral MBBR packing structure are either planar or non-planar.

[0006] Furthermore, the cross-section of the shell is arranged in an arc shape or a polygonal structure.

[0007] Furthermore, the shell is designed with a wave-like structure in an arc or polygonal shape.

[0008] Furthermore, the attached membrane structure is configured as a sheet-like structure.

[0009] Preferably, the membrane structure includes membrane plates and membrane strips. There are multiple membrane plates, with one end connected to each other and the other end connected to the inner wall of the shell. Membrane strips (such as...) are provided at one or more locations on the inner wall, outer wall, and membrane plates of the shell. Figures 1a-4c (As shown).

[0010] Furthermore, the membrane-attached structure includes membrane-attached plates and membrane-attached strips. There are five membrane-attached plates, with one end connected to each other and the other end connected to the inner wall of the shell. The outer wall of the shell is provided with membrane-attached strips (such as...). Figures 1a-2c (As shown).

[0011] Furthermore, the membrane-attached structure includes membrane-attached plates and membrane-attached strips. The number of membrane-attached plates is six, with one end of each plate interconnected and the other end connected to the inner wall of the shell. The outer wall of the shell is provided with membrane-attached strips (such as...). Figures 3a-4c (As shown).

[0012] Preferably, the external membrane structure is disposed on the inner wall of the shell via a membrane plate. Membrane strips are provided at one or more locations on the inner wall, outer wall, and membrane plate of the shell. The internal structure of the membrane structure has honeycomb-shaped membrane holes, and membrane strips (e.g., [missing information]) can also be provided on the inner and outer walls of the membrane holes. Figures 5a-6c (As shown).

[0013] Preferably, the membrane-attached structure includes long membrane plates, short membrane plates, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of each long membrane plate is connected to the others, and the other end of each long membrane plate is connected to the shell. The inner membrane ring, outer membrane ring, and shell are arranged sequentially from the inside out. The outer wall of the inner membrane ring is connected to the inner wall of the outer membrane ring, and the outer wall of the outer membrane ring is connected to the inner wall of the shell via short membrane plates. Membrane strips are provided at one or more locations on the inner and outer walls of the shell, the inner and outer walls of the inner and outer membrane rings, and the long and short membrane plates. A fan-shaped membrane-attached hole is formed between the long membrane plates, short membrane plates, inner membrane ring, and outer membrane ring. Membrane strips (such as...) can also be provided on the inner and outer walls of the membrane-attached hole. Figures 7a-10c (As shown).

[0014] Further, the membrane attachment structure includes long membrane plates, short membrane plates, an inner membrane ring, an outer membrane ring, and membrane strips. There are three long membrane plates and two outer membrane rings. One end of each of the three long membrane plates is connected to the other end, and the other end of each long membrane plate is connected to the shell. The inner membrane ring, the two outer membrane rings, and the shell are arranged sequentially from the inside out. The outer wall of the inner membrane ring is connected to the inner wall of one outer membrane ring, the outer wall of one outer membrane ring is connected to the inner wall of another outer membrane ring, and the outer wall of another outer membrane ring is connected to the inner wall of the shell via short membrane plates. Membrane strips are provided on the inner walls of both the inner and outer membrane rings. A fan-shaped membrane attachment hole (e.g., ...) is formed between the long membrane plates, short membrane plates, inner membrane ring, and outer membrane rings. Figures 7a-8c (As shown).

[0015] Further, the membrane-attached structure includes long membrane plates, short membrane plates, inner membrane rings, outer membrane rings, and membrane strips. There are four long membrane plates and two outer membrane rings. One end of each of the four long membrane plates is connected to the other end, and the other end of each long membrane plate is connected to the shell. The inner membrane ring, the two outer membrane rings, and the shell are arranged sequentially from the inside out. The outer wall of the inner membrane ring is connected to the inner wall of one outer membrane ring, the outer wall of one outer membrane ring is connected to the inner wall of another outer membrane ring, and the outer wall of another outer membrane ring is connected to the inner wall of the shell via short membrane plates. Membrane strips are provided on the inner walls of both the inner and outer membrane rings. A fan-shaped membrane-attached hole (e.g., ...) is formed between the long membrane plates, short membrane plates, inner membrane rings, and outer membrane rings. Figures 9a-10c (As shown).

[0016] Preferably, the membrane-attached structure includes long membrane plates, short membrane plates, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of each long membrane plate is connected to the outer wall of the inner membrane ring, and the other end is connected to the inner wall of the shell. The inner membrane ring, outer membrane ring, and shell are arranged sequentially from the inside out. The outer wall of the outer membrane ring is connected to the inner wall of the shell via short membrane plates. Membrane strips are provided at one or more locations on the inner and outer walls of the shell, the inner and outer walls of the inner and outer membrane rings, and the long and short membrane plates. A fan-shaped membrane-attached hole is formed between the long and short membrane plates, the inner and outer membrane rings, and the outer membrane ring. Membrane strips (such as...) can also be provided on the inner and outer walls of the membrane-attached hole. Figures 11a-15c (As shown).

[0017] Furthermore, the membrane-attached structure includes a long membrane-attached plate, a short membrane-attached plate, an inner membrane-attached ring, an outer membrane-attached ring, and membrane-attached strips. The inner membrane-attached ring, the outer membrane-attached ring, and the shell are arranged sequentially from the inside out. The outer wall of the inner membrane-attached ring is connected to the inner wall of the shell via the long membrane-attached plate, and the outer wall of the outer membrane-attached ring is connected to the inner wall of the shell via the short membrane-attached plate. A membrane-attached strip is provided on the outer wall of the outer membrane-attached ring. A fan-shaped membrane-attached hole (e.g., ...) is formed between the long membrane-attached plate, the short membrane-attached plate, the inner membrane-attached ring, and the outer membrane-attached ring. Figures 11a-12c (As shown).

[0018] Furthermore, the external membrane ring is arranged in a spiral structure (e.g., Figures 13a-13c (As shown).

[0019] Further, the membrane attachment structure includes long membrane plates, short membrane plates, inner membrane rings, outer membrane rings, and membrane strips. There are six long membrane plates and two outer membrane rings. One end of each of the six long membrane plates is connected to the outer wall of the inner membrane ring, and the other end of each long membrane plate is connected to the inner wall of the shell. The inner membrane ring, the two outer membrane rings, and the shell are arranged sequentially from the inside out. The outer wall of one outer membrane ring is connected to the inner wall of another outer membrane ring, and the outer wall of another outer membrane ring is connected to the inner wall of the shell via short membrane plates. Membrane strips are provided on the outer wall of the inner membrane ring, the inner and outer walls of the outer membrane rings, the short membrane plates, and the long membrane plates. A fan-shaped membrane attachment hole is formed between the long membrane plates, short membrane plates, inner membrane ring, and outer membrane ring (e.g., ...). Figures 14a-15c (As shown).

[0020] Preferably, the membrane structure includes membrane plates and membrane strips. There are multiple membrane plates, one end of which is connected to the inner wall of the shell. Membrane strips (such as...) are provided at one or more locations on the inner wall, outer wall, and membrane plates of the shell. Figures 16a-17c (As shown).

[0021] Compared with the prior art, the present invention has the following advantages: the spiral MBBR packing structure has a high specific surface area: the spiral MBBR packing structure has a complex cavity design with fan-shaped film attachment holes, and the internal film attachment structure surrounded by the spiral ring structure shell provides a high protected specific surface area.

[0022] Rapid biofilm formation: The spiral MBBR packing structure has a high protected specific surface area, which can provide abundant attachment sites for microorganisms during the biofilm formation stage; at the same time, the rich microbial community attached to the spiral MBBR packing increases its degradation rate of pollutants in the water.

[0023] High mass transfer efficiency: The open shell structure design of the spiral MBBR packing can improve the transfer efficiency of pollutants and dissolved oxygen into the biofilm, and reduce the energy consumption of aeration, oxygenation, fluidization and stirring equipment during daily operation.

[0024] High nitrification efficiency: The nitrifying and nitrifying bacteria enriched on the spiral MBBR packing can quickly convert ammonia nitrogen in the water into nitrate nitrogen, avoiding the problem of nitrite accumulation in the effluent.

[0025] High stability: The spiral MBBR packing is more susceptible to the impact of water flow and air bubbles, making it less prone to aging biofilm accumulation and clogging of biofilm pores. Attached Figure Description

[0026] Figure 1a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 1 of this utility model.

[0027] Figure 1b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 1 of this utility model.

[0028] Figure 1c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 1 of this utility model.

[0029] Figure 2a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 1 of this utility model.

[0030] Figure 2b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 1 of this utility model.

[0031] Figure 2c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 1 of this utility model.

[0032] Figure 3a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 2 of this utility model.

[0033] Figure 3b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 2 of this utility model.

[0034] Figure 3c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 2 of this utility model.

[0035] Figure 4aThis is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 2 of this utility model.

[0036] Figure 4b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 2 of this utility model.

[0037] Figure 4c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 2 of this utility model.

[0038] Figure 5a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 3 of this utility model.

[0039] Figure 5b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 3 of this utility model.

[0040] Figure 5c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 3 of this utility model.

[0041] Figure 6a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 3 of this utility model.

[0042] Figure 6b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 3 of this utility model.

[0043] Figure 6c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 3 of this utility model.

[0044] Figure 7a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 4 of this utility model.

[0045] Figure 7b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 4 of this utility model.

[0046] Figure 7c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 4 of this utility model.

[0047] Figure 8a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 4 of this utility model.

[0048] Figure 8bThis is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 4 of this utility model.

[0049] Figure 8c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 4 of this utility model.

[0050] Figure 9a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 5 of this utility model.

[0051] Figure 9b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 5 of this utility model.

[0052] Figure 9c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 5 of this utility model.

[0053] Figure 10a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 5 of this utility model.

[0054] Figure 10b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 5 of this utility model.

[0055] Figure 10c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 5 of this utility model.

[0056] Figure 11a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0057] Figure 11b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0058] Figure 11c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0059] Figure 12a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 6 of this utility model.

[0060] Figure 12b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 6 of this utility model.

[0061] Figure 12cThis is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 6 of this utility model.

[0062] Figure 13a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0063] Figure 13b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0064] Figure 13c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 6 of this utility model.

[0065] Figure 14a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 7 of this utility model.

[0066] Figure 14b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 7 of this utility model.

[0067] Figure 14c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 7 of this utility model.

[0068] Figure 15a This is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 7 of this utility model.

[0069] Figure 15b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 7 of this utility model.

[0070] Figure 15c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 7 of this utility model.

[0071] Figure 16a This is a front view schematic diagram of the spiral MBBR packing structure (planar) of Embodiment 8 of this utility model.

[0072] Figure 16b This is a bottom view of the spiral MBBR packing structure (planar) of Embodiment 8 of this utility model.

[0073] Figure 16c This is a three-dimensional structural diagram of the spiral MBBR packing structure (planar) of Embodiment 8 of this utility model.

[0074] Figure 17aThis is a schematic diagram of the main structure of the spiral MBBR packing structure (non-planar, i.e. S-shaped) of Embodiment 8 of this utility model.

[0075] Figure 17b This is a bottom view of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 8 of this utility model.

[0076] Figure 17c This is a three-dimensional structural diagram of the spiral MBBR packing structure (non-planar, i.e., S-shaped) of Embodiment 8 of this utility model.

[0077] In the diagram: 1. Shell; 2. Membrane attachment structure; 3. Membrane attachment hole. Film mounting plate A1, film mounting strip A2, Film mounting plate B1, film mounting strip B2, Film-coating plate C1, film-coating strip C2, Long film-mounting plate D1, short film-mounting plate D2, inner film-mounting ring D3, outer film-mounting ring D4, film-mounting strip D5 Long film mounting plate E1, short film mounting plate E2, inner film mounting ring E3, outer film mounting ring E4, film mounting strip E5 Long film hanging plate F1, short film hanging plate F2, inner film hanging ring F3, outer film hanging ring F4, film hanging strip F5 Long film-mounting plate G1, short film-mounting plate G2, inner film-mounting ring G3, outer film-mounting ring G4, film-mounting strip G5 Film mounting plate H1, film mounting strip H2. Detailed Implementation

[0078] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0079] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is merely for clarity and not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0080] Example 1, such as Figures 1a-2cAs shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 1a-1c (as shown) or in an S-shape (such as) Figures 2a-2c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 1a , 2a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0081] The membrane structure 2 in this embodiment includes membrane plates A1 and membrane strips A2. There are five membrane plates A1. One end of the five membrane plates A1 is connected to each other, and the other end of the five membrane plates A1 is connected to the inner wall of the shell 1. The outer wall of the shell 1 is provided with membrane strips A2.

[0082] Example 2, as Figures 3a-4c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 3a-3c (as shown) or in an S-shape (such as) Figures 4a-4c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 3a , 4a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0083] The membrane structure 2 in this embodiment includes membrane plates B1 and membrane strips B2. There are six membrane plates B1. One end of the six membrane plates B1 is connected to each other, and the other end of the six membrane plates B1 is connected to the inner wall of the shell 1. The outer wall of the shell 1 is provided with membrane strips B2.

[0084] In summary, the membrane structure 2 includes membrane plates and membrane strips. There are multiple membrane plates, with one end connected to each other and the other end connected to the inner wall of the shell 1. Membrane strips are provided on the inner wall and outer wall of the shell 1, as well as at one or more locations on the membrane plates (Examples 1-2, such as...). Figures 1a-4c (As shown).

[0085] Example 3, as Figures 5a-6c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 5a-5c (as shown) or in an S-shape (such as) Figures 6a-6c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 5a , 6a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0086] In this embodiment, the membrane structure 2 is externally mounted on the inner wall of the shell 1 via a membrane plate C1. One or more membrane strips C2 are provided on the inner wall, outer wall, and membrane plate C1 of the shell 1. The membrane structure 2 is internally provided with honeycomb-shaped membrane holes 3. Membrane strips C2 can also be provided on the inner and outer walls of the membrane holes 3.

[0087] Example 4, as Figures 7a-8c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 7a-7c (as shown) or in an S-shape (such as) Figures 8a-8c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 7a , 8a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0088] The membrane structure 2 in this embodiment includes a long membrane plate D1, a short membrane plate D2, an inner membrane ring D3, an outer membrane ring D4, and a membrane strip D5. There are three long membrane plates D1 and two outer membrane rings D4. One end of the three long membrane plates D1 is connected to each other, and the other end of each long membrane plate D1 is connected to the shell 1. The inner membrane ring D3, the two outer membrane rings D4, and the shell 1 are arranged sequentially from the inside to the outside. The outer wall of the inner membrane ring D3 is connected to the inner wall of one outer membrane ring D4, the outer wall of one outer membrane ring D4 is connected to the inner wall of another outer membrane ring D4, and the outer wall of another outer membrane ring D4 is connected to the inner wall of the shell 1 through the short membrane plate D2. The inner walls of the inner membrane ring D3 and the outer membrane ring D4 are provided with membrane strips D5. The long membrane plates D1, the short membrane plates D2, the inner membrane ring D3, and the outer membrane ring D4 form a fan-shaped membrane hole 3.

[0089] Example 5, as Figures 9a-10c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 9a-9c (as shown) or in an S-shape (such as) Figures 10a-10c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 9a , 10a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0090] The membrane structure 2 in this embodiment includes a long membrane plate E1, a short membrane plate E2, an inner membrane ring E3, an outer membrane ring E4, and a membrane strip E5. There are four long membrane plates E1 and two outer membrane rings E4. One end of the four long membrane plates E1 is connected to each other, and the other end of each long membrane plate E1 is connected to the shell 1. The inner membrane ring E3, the two outer membrane rings E4, and the shell 1 are arranged sequentially from the inside to the outside. The outer wall of the inner membrane ring E3 is connected to the inner wall of one outer membrane ring E4, the outer wall of one outer membrane ring E4 is connected to the inner wall of another outer membrane ring E4, and the outer wall of another outer membrane ring E4 is connected to the inner wall of the shell 1 through the short membrane plate E2. The inner walls of the inner membrane ring E3 and the outer membrane ring E4 are provided with membrane strips E5. The long membrane plates E1, the short membrane plates E2, the inner membrane ring E3, and the outer membrane ring E4 form a fan-shaped membrane hole 3.

[0091] In summary, the membrane structure 2 includes long membrane plates, short membrane plates, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of each long membrane plate is connected to the others, and the other end of each long membrane plate is connected to the shell 1. The inner membrane ring, outer membrane ring, and shell are arranged sequentially from the inside out. The outer wall of the inner membrane ring is connected to the inner wall of the outer membrane ring, and the outer wall of the outer membrane ring is connected to the inner wall of the shell through short membrane plates. Membrane strips are provided at one or more locations on the inner and outer walls of the shell 1, the inner and outer walls of the inner and outer membrane rings, and the long and short membrane plates. A fan-shaped membrane hole is formed between the long membrane plates, short membrane plates, inner membrane ring, and outer membrane ring. Membrane strips can also be provided on the inner and outer walls of the membrane hole (Examples 4-5, etc.). Figures 7a-10c (As shown).

[0092] Example 6, as Figures 11a-13c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 11a-11c (as shown) or in an S-shape (such as) Figures 12a-12c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 11a , 12a The shell 1 can be arranged in an arc or polygonal structure (as shown in 13a), or it can be arranged in an arc or polygonal structure with a wave structure.

[0093] The membrane structure 2 in this embodiment includes a long membrane plate F1, a short membrane plate F2, an inner membrane ring F3, an outer membrane ring F4, and a membrane strip F5. The inner membrane ring F3, the outer membrane ring F4, and the shell 1 are arranged sequentially from the inside to the outside. The outer wall of the inner membrane ring F3 is connected to the inner wall of the shell 1 through the long membrane plate F1, and the outer wall of the outer membrane ring F4 is connected to the inner wall of the shell 1 through the short membrane plate F2. The outer wall of the outer membrane ring F4 is provided with a membrane strip F5. The long membrane plate F1, the short membrane plate F2, the inner membrane ring F3, and the outer membrane ring F4 form a fan-shaped membrane hole 3. The outer membrane ring F4 is spiral-shaped (e.g., ...). Figures 13a-13c (As shown) Structural settings.

[0094] Example 7, as Figures 14a-15c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 14a-14c (as shown) or in an S-shape (such as) Figures 15a-15c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 14a , 15a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0095] The membrane structure 2 in this embodiment includes a long membrane plate G1, a short membrane plate G2, an inner membrane ring G3, an outer membrane ring G4, and a membrane strip G5. There are six long membrane plates G1 and two outer membrane rings G4. One end of each of the six long membrane plates G1 is connected to the outer wall of the inner membrane ring G3, and the other end of each of the six long membrane plates G1 is connected to the inner wall of the shell 1. The inner membrane ring G3, the two outer membrane rings G4, and the shell 1 are arranged sequentially from the inside out. The outer wall of one external membrane ring G4 is connected to the inner wall of another external membrane ring G4, and the outer wall of another external membrane ring G4 is connected to the inner wall of the shell 1 through a short membrane plate G2. The outer wall of the inner membrane ring G3, the inner and outer walls of the external membrane ring G4, the short membrane plate G2, and the long membrane plate G1 are all provided with membrane strips G5. The long membrane plate G1, the short membrane plate G2, the inner membrane ring G3, and the outer membrane ring G4 form a fan-shaped membrane hole 3.

[0096] In summary, the membrane structure 2 includes long membrane plates, short membrane plates, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of each long membrane plate is connected to the outer wall of the inner membrane ring, and the other end is connected to the inner wall of the shell. The inner membrane ring, outer membrane ring, and shell are arranged sequentially from the inside out. The outer wall of the membrane ring is connected to the inner wall of the shell via short membrane plates. One or more locations on the inner and outer walls of the shell 1, the inner and outer walls of the inner and outer membrane rings, and the long and short membrane plates form fan-shaped membrane holes. Membrane strips can also be provided on the inner and outer walls of the membrane holes (Examples 6-7, such as...). Figures 11a-15c (As shown).

[0097] Example 8, as Figures 16a-17c As shown: The spiral MBBR packing structure in this embodiment includes a shell 1 and a membrane attachment structure 2. The membrane attachment structure 2 is disposed on the shell 1, and a membrane attachment hole 3 is formed between the shell 1 and the membrane attachment structure 2. The outer wall of the shell 1 is arranged in a spiral shape, and the two ends of the spiral MBBR packing structure are planar (e.g., Figures 16a-16c (as shown) or in an S-shape (such as) Figures 17a-17c (As shown) Structural configuration, cross-section of shell 1 (as shown) Figure 16a , 17a The shell 1 can be arranged in an arc or polygonal structure (as shown in the direction), or it can be arranged in an arc or polygonal structure with a wave structure.

[0098] The membrane structure 2 in this embodiment includes a membrane plate H1 and a membrane strip H2. There are multiple membrane plates H1. One end of each membrane plate H1 is connected to the inner wall of the shell 1. The membrane strip H2 is provided on the inner wall, outer wall, and one or more locations on the membrane plate H1.

[0099] Example 9: The working method of the spiral MBBR packing structure in this example is as follows: Setting the shell 1 as a spiral structure allows water flow and air bubbles to penetrate the interior of the MBBR packing structure from multiple directions, thereby enhancing the turbulence of the fluid inside the packing and thus enhancing the transfer efficiency of dissolved substances into the MBBR packing biofilm; at the same time, the spiral structure of the shell 1 allows the MBBR packing structure to spontaneously rotate around the axis when impacted by water flow and air bubbles, thereby effectively reducing the accumulation problem and reducing the energy consumption required for packing fluidization.

[0100] Example 10: The processing technology of the spiral MBBR packing structure in this example is as follows: raw material → extruder (heating) → mold → shaping (vacuum negative pressure + water cooling shaping) → traction cutting (cutting) → packaging.

[0101] In other words, high-density polyethylene (or polypropylene, etc.) is thoroughly mixed with titanium dioxide (or calcium carbonate, etc.); the mixed raw materials are fed into an extruder, where they are heated, compressed, and sheared to be fully plasticized into a uniform melt; the melt is shaped into a continuous strip with a specific cross-sectional shape through a die head; after leaving the die head, the strip is vacuum shaped and cooled by a vacuum shaping table to form a fixed shape; then the filler is spirally cut by a rotating cutter at a matched traction speed; after spiral cutting, it is cut into segments by a cutting table.

[0102] Specifically, the spiral MBBR packing structure adopts a complex porous cavity design to increase the protected specific surface area of ​​the packing; the high specific surface area of ​​the packing increases the biofilm formation capacity of the spiral MBBR packing structure by increasing the contact area with the water.

[0103] Through manufacturing processes such as rotary cutting, a spiral-shaped shell 1, or an external membrane ring F4 with a spiral-shaped interior, is produced (e.g., ...). Figures 13a-13c As shown, the packing material allows water flow and air bubbles to pass through the inside of the packing material through multiple channels, enhancing the turbulence of the fluid inside the carrier and improving the transfer efficiency of dissolved substances into the biofilm inside the packing material. At the same time, the spiral outer wall design makes it easier for the packing material to generate spontaneous rotation around the axis when impacted by water flow and air bubbles, effectively reducing the accumulation problem of traditional packing materials and reducing the energy consumption required for packing fluidization.

[0104] During the manufacturing process, the density of the packing is controlled to be slightly lower or slightly higher than that of fresh water or seawater through a blending process, which enhances the fluidization / tumbling effect of the packing in water treatment applications.

[0105] By designing molds with different cavity structures and using manufacturing processes such as rotary cutting, spiral MBBR packing structures with different internal biofilm structures are produced. This improves the application range of the packing in water bodies with different pollutant concentrations and effectively avoids packing blockage or difficulty in microbial attachment.

[0106] Compared with the prior art, the spiral MBBR packing structure in this application accelerates the biofilm formation rate. The biofilm formation rate of nitrifying bacteria in the packing was compared under two identical experimental conditions (water temperature 28℃, influent ammonia nitrogen concentration 20 mg / L, hydraulic retention time 48 h, packing ratio 30%), and the results are recorded in Table 1 below.

[0107] By using the spiral MBBR packing structure of this application, the biofilm formation rate was increased by 7%.

[0108] Table 1. Comparison between the carriers of this application and prior art. carrier type Size, mm <![CDATA[Specific surface area, m 2 / m 3 > Duration of biofilm formation by nitrifying bacteria, d (days) Comparison document 1 Φ25×4 ≥800 55 Example 1 of this application Φ10×7 ≥800 51

[0109] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model are included within the protection scope of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A spiral MBBR packing structure, comprising a shell (1) and a biofilm structure (2), wherein the biofilm structure (2) is disposed on the shell (1), characterized in that: A membrane attachment hole (3) is formed between the shell (1) and the membrane attachment structure (2), and the outer wall of the shell (1) is arranged in a spiral structure.

2. The spiral MBBR packing structure according to claim 1, characterized in that: The two ends of the spiral MBBR packing structure are either planar or non-planar.

3. The spiral MBBR packing structure according to claim 1, characterized in that: The shell (1) has an arc-shaped or polygonal cross-section.

4. The spiral MBBR packing structure according to claim 3, characterized in that: The shell is set in an arc or polygonal structure (1) with a wave structure.

5. The spiral MBBR packing structure according to claim 1, characterized in that: The attached membrane structure (2) is a sheet-like structure.

6. The spiral MBBR packing structure according to claim 1, characterized in that: The membrane structure (2) includes membrane plates and membrane strips. There are multiple membrane plates, one end of which is connected to each other, and the other end of which is connected to the inner wall of the shell (1). Membrane strips are provided on the inner wall, outer wall, and one or more of the membrane plates.

7. The spiral MBBR packing structure according to claim 1, characterized in that: The outer side of the membrane structure (2) is set on the inner wall of the shell (1) by a membrane plate. One or more of the inner wall, outer wall and membrane plate of the shell (1) are provided with membrane strips. The interior of the membrane structure (2) is provided with membrane holes (3) in a honeycomb structure.

8. The spiral MBBR packing structure according to claim 1, characterized in that: The membrane structure (2) includes a long membrane plate, a short membrane plate, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of the multiple long membrane plates is connected to each other, and the other end of the multiple long membrane plates is connected to the shell (1). The inner membrane ring, the outer membrane ring, and the shell (1) are arranged sequentially from the inside to the outside. The outer wall of the inner membrane ring and the inner wall of the outer membrane ring, and the outer wall of the outer membrane ring and the inner wall of the shell (1) are connected by short membrane plates. One or more of the inner and outer walls of the shell (1), the inner and outer walls of the inner membrane ring, the inner and outer walls of the outer membrane ring, and the long and short membrane plates are provided with membrane strips. Membrane holes are formed between the long membrane plate, the short membrane plate, the inner membrane ring, and the outer membrane ring.

9. The spiral MBBR packing structure according to claim 1, characterized in that: The membrane structure (2) includes a long membrane plate, a short membrane plate, an inner membrane ring, an outer membrane ring, and membrane strips. There are multiple long membrane plates and one or more outer membrane rings. One end of each long membrane plate is connected to the outer wall of the inner membrane ring, and the other end of each long membrane plate is connected to the inner wall of the shell (1). The inner membrane ring, the outer membrane ring, and the shell (1) are arranged sequentially from the inside to the outside. The outer wall of the outer membrane ring is connected to the inner wall of the shell (1) through a short membrane plate. Membrane strips are provided at one or more locations on the inner and outer walls of the shell (1), the inner and outer walls of the inner membrane ring, the inner and outer walls of the outer membrane ring, the long membrane plate, and the short membrane plate. Membrane holes are formed between the long membrane plate, the short membrane plate, the inner membrane ring, and the outer membrane ring.

10. The spiral MBBR packing structure according to claim 1, characterized in that: The membrane structure (2) includes membrane plates and membrane strips. There are multiple membrane plates, one end of which is connected to the inner wall of the shell (1). Membrane strips are provided on the inner wall, outer wall, and one or more of the membrane plates.

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