Construction sewage treatment system

Abstract

The present invention belongs to the field of sewage treatment technology and relates to a construction wastewater treatment system comprising a reaction tank, an aeration assembly, a diverter, and a base that supports and secures the diverter within the reaction tank. The aeration assembly comprises a lower aeration unit and an upper aeration unit. The diverter comprises an outer cylinder, at least one inner cylinder, and a central column. The outer cylinder, inner cylinder, and central column are coaxially mounted, with a spacing formed between their opposing circumferential surfaces. Internal teeth are formed on the inner circumferential surfaces of the outer and inner cylinders, while external teeth are formed on the outer circumferential surfaces of the inner cylinder and central column. Both the internal and external teeth protrude radially, and the internal and external teeth are arranged in an alternating pattern on the opposing circumferential surfaces. A spacing is formed between the tips of the internal and external teeth and the opposing circumferential surfaces. The aeration pipe openings of the aeration unit correspond to the upper and lower ends of the diverter, respectively. This patent improves the mixing and mass transfer between aeration and water, helping to promote the oxidative decomposition of organic matter in sewage under high dissolved oxygen conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a system for treating sewage generated during construction. Background Art

[0002] If the sewage generated during construction is not effectively treated, it will cause serious pollution and damage to the environment. Therefore, the treatment of construction sewage has become increasingly important. The characteristics of wastewater / sewage generated during construction are mainly as follows: (1) Large water volume, including domestic sewage, sewage generated by construction car washing, sewage generated by coagulation mixing and masonry processes, etc. The amount of sewage generated is quite large; (2) High turbidity and high suspended solids content. Soil, dust and other debris caused by the construction process will be carried into the wastewater, resulting in high turbidity and high suspended solids content of the wastewater; (3) High COD and BOD indicators. The wastewater contains a large amount of organic matter, heavy metals, bacteria and other harmful substances. If it is discharged directly into the environment without treatment, it will cause serious pollution to the environment and water sources and endanger human health. Organic matter can also cause eutrophication of water bodies, trigger algae outbreaks, and affect aquaculture.

[0003] To effectively manage and treat construction wastewater, currently common treatment methods include physical treatment, chemical treatment, and biological treatment. Physical treatment primarily removes solid particles, suspended matter, and sediment from wastewater through sedimentation, filtration, adsorption, and other techniques, achieving preliminary water purification. This constitutes the primary stage of wastewater treatment. Chemical treatment utilizes pharmaceuticals to treat wastewater, primarily by adjusting its pH, dissolving or precipitating harmful substances, and removing heavy metal ions and other harmful substances. This constitutes an intermediate stage of wastewater treatment. If the wastewater is not intended for recycling and is discharged, it can be discharged after chemical treatment and simple treatment steps such as aeration, activated carbon adsorption, and membrane filtration. If recycling is required, biological treatment (advanced treatment) is required. This utilizes the ability of microorganisms to degrade organic matter, primarily through the activated sludge process and fixed biofilm process. Biological treatment effectively removes COD and BOD from the wastewater. Common advanced treatment methods include deep aeration tanks, biological contact oxidation tanks and ultraviolet disinfection, which can more thoroughly remove organic matter, bacteria and viruses in construction wastewater and ensure the quality of the effluent.

[0004] This patented technology is applied in the advanced treatment link of construction wastewater treatment, aiming to solve the problems of insufficient aeration, poor mixing and mass transfer between oxygen and microorganisms, and low oxygen solubility in water bodies that cannot better meet the needs of microorganisms for sufficient oxidation and decomposition of organic matter enriched on the surface of biological carriers. Summary of the Invention

[0005] To achieve the above-mentioned objectives, the present invention provides a construction wastewater treatment system, which can improve the mixing and mass transfer effects between aeration and water bodies by implementing diversion treatment on the wastewater, and help the organic matter in the wastewater to interact with microorganisms in a fluidized state under sufficient aeration conditions. It can provide sufficient oxygen for the microbial community adsorbed on the surface of the microbial carrier, and achieve the purpose of oxidative decomposition of organic matter in the wastewater under high dissolved oxygen conditions.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a construction wastewater treatment system, comprising:

[0007] The reaction tank is provided with a water inlet at the bottom of the tank cavity.

[0008] The aeration assembly includes a lower aeration unit and an upper aeration unit.

[0009] The flow divider includes an outer cylinder, at least one inner cylinder, and a central column. The outer cylinder, inner cylinder, and central column are coaxially assembled and nested together. A radial spacing is formed between the inner circumference of the outer cylinder and the outer circumference of the inner cylinder, and between the outer circumference of the central column and the inner circumference of the inner cylinder, forming an annular channel extending axially therethrough. The inner circumference of the outer cylinder is formed with multiple internal teeth spaced apart in the axial direction, forming a multi-layer internal tooth structure. The outer circumference of the inner cylinder is formed with multiple external teeth spaced apart in the axial direction, and the inner circumference is formed with multiple internal teeth spaced apart in the axial direction, forming a multi-layer external tooth structure. The outer circumference of the central column is formed with multiple external teeth spaced apart in the axial direction, forming a multi-layer external tooth structure. Both the internal and external teeth protrude radially outward, and the layers of internal teeth and layers of external teeth on adjacent / opposing inner and outer circumferential surfaces are arranged in an alternating manner. A gap is formed between the protruding tip of the inner tooth portion and the adjacent outer peripheral surface, and a gap is formed between the protruding tip of the outer tooth portion and the adjacent inner peripheral surface.

[0010] And a base, which is fixed in the tank cavity of the reaction tank and the lower ends of the outer cylinder, inner cylinder and central column on the diverter are in contact with the base, and can stand on the upper end surface of the base, and finally rely on the support of the base to suspend the diverter in the tank cavity of the reaction tank.

[0011] The aeration pipe openings of the lower aeration unit are distributed above the inner port of the water inlet.

[0012] The aeration pipe orifices of the upper aeration unit are distributed above the upper port of the annular channel on the diverter.

[0013] In the above solution, the microorganism carrier filler for carrying microorganisms can be placed in the entire tank cavity of the reaction tank, or can be mainly placed in the tank cavity above and below the diverter.

[0014] Optionally, a downwardly extending annular flange is formed at the lower end of the outer cylinder. A plurality of support arms are formed at the lower end of the inner cylinder, the support arms extending downward and being alternately distributed around the circumference. A support arm is formed at the lower portion of the central column and extends downward.

[0015] The lower ends of the annular flange and the supporting arms are in contact with the end faces of the partitions distributed alternately on the base, so that the outer cylinder, the inner cylinder and the central column can stand on the base respectively.

[0016] Optionally, the inner cylinder includes a first inner cylinder, a second inner cylinder and a third inner cylinder, so that the first inner cylinder is placed in the outer cylinder, the second inner cylinder is placed in the first inner cylinder, the third inner cylinder is placed in the second inner cylinder, and the center column is placed in the third inner cylinder.

[0017] Radial spacing is formed between the relative circumferential surfaces of the first inner cylinder and the outer cylinder, between the relative circumferential surfaces of the second inner cylinder and the first inner cylinder, between the relative circumferential surfaces of the third inner cylinder and the second inner cylinder, and between the relative circumferential surfaces of the center column and the third inner cylinder, thereby forming an outer ring channel and an inner ring channel that penetrate along the axial direction.

[0018] The outer circumferences of the first, second, and third inner cylinders are each formed with multiple external teeth spaced apart in the axial direction, and the inner circumferences are each formed with multiple internal teeth spaced apart in the axial direction. The layers of internal teeth and layers of external teeth on the multiple pairs of adjacent circumferences between the outer cylinder, each inner cylinder, and the center column are arranged in a vertically staggered arrangement.

[0019] Optionally, the upper end surface of the first inner tube and the upper end surface of the third inner tube are retracted downward relative to the upper end surface of the outer tube, the upper end surface of the second inner tube, and the upper end surface of the center column.

[0020] Radial grooves are formed on the upper end surfaces of the outer cylinder, the second inner cylinder and the central column, so that the radial grooves are arranged along the same radial direction. A cross bar is inserted into the radial groove to connect the outer cylinder, the second inner cylinder and the central column into a whole.

[0021] Optionally, the inner tooth portion and / or the outer tooth portion is annular, forming an annular radial flange.

[0022] Preferably, the cross section of the inner toothing and / or the cross section of the outer toothing is triangular in shape—as viewed in axial section.

[0023] The "radial flange" referred to here can be understood as a situation where the outward protruding extension direction of the radial flange is consistent with the radial direction of the outer tube, inner tube or central column, or a situation where the radial flange extends upward or downward relative to the radial direction of the outer tube, inner tube or central column.

[0024] Optionally, both the inner tooth portion and the outer tooth portion are a plurality of radial flange teeth distributed alternately around the circumference.

[0025] On two opposite / adjacent circumferential surfaces, the radial flange teeth formed on the inner circumferential surface correspond to the upper or lower part of the circumferential gap between the two adjacent radial flange teeth formed on the outer circumferential surface; in other words, on two opposite circumferential surfaces, the radial flange teeth formed on the outer circumferential surface correspond to the upper or lower part of the circumferential gap between the two adjacent radial flange teeth formed on the inner circumferential surface.

[0026] Optionally, the radial flange teeth are arc-shaped elongated strips or pyramids extending in the circumferential direction.

[0027] Preferably, the cross section of the arc-shaped elongated body is triangular.

[0028] Optionally, a plurality of diverters are fixedly provided on the base and the diverters are distributed alternately up and down in multiple layers.

[0029] The aeration assembly further comprises a plurality of intermediate aeration units, and each intermediate aeration unit is correspondingly arranged between two adjacent diverters. A microbial carrier filler carrying microorganisms is placed in at least the reaction tank cavity between the two adjacent diverters.

[0030] Optionally, the aeration assembly further comprises an intermediate aeration unit. A plurality of arc-shaped cavities are formed on the inner wall of the outer cylinder and / or the outer wall of the central column. The aeration pipe opening of the intermediate aeration unit extends into the arc-shaped cavity.

[0031] The multiple arcuate cavities distributed on the inner wall of the outer cylinder or the outer wall of the central column can be divided into multiple groups, each group including multiple arcuate cavities, and the number of arcuate cavities in each group can be the same or different. Each group of arcuate cavities is divided into multiple layers in the axial direction, and the arcuate cavities in two adjacent layers can be arranged directly above or below each other. Preferably, the arrangement is staggered, that is, the arcuate cavities in two adjacent layers partially overlap when viewed from above.

[0032] When multiple layers of arc-shaped cavities are provided, an intermediate aeration unit is respectively configured corresponding to each layer of the arc-shaped cavities, so that the aeration pipe openings of the intermediate aeration unit extend into each arc-shaped cavity of each layer.

[0033] Optionally, a through hole is formed along the axis of the central column, and an axial tube is inserted into the through hole. The upper end of the axial tube is connected to the inner end of the air inlet pipe, and the outer end of the air inlet pipe is connected to the aeration unit. The lower end of the axial tube extends to the lower portion of the diverter and is located below the lower end of the annular channel. It is connected to multiple radial branches, and the multiple radial branches are distributed alternately around the circumference. The radial branches extend throughout the entire radial extension area of the annular channel, and multiple aeration nozzles are distributed on the tube walls of the radial branches.

[0034] The beneficial effects of the present invention are as follows: the construction wastewater treatment system involved in the present invention can improve the mixing and mass transfer effects between aeration and water bodies by implementing diversion treatment on the wastewater, which helps to achieve the interaction between organic matter in the wastewater and microorganisms in a fluidized state under sufficient aeration conditions, and can provide sufficient oxygen for the microbial community adsorbed on the surface of the microbial carrier, thereby achieving the purpose of oxidative decomposition of organic matter in the wastewater under a high dissolved oxygen state, thereby further improving the COD and BOD indicators of water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the local cross-sectional structure of Example 1.

[0036] Figure 2 Schematic diagram of the top view of the base.

[0037] Figure 3 This is a schematic diagram of the cross-sectional structure of the outer cylinder in Example 1.

[0038] Figure 4 This is a schematic diagram of the top view of the outer cylinder in Example 1.

[0039] Figure 5 This is a schematic diagram of the cross-sectional structure of the first inner cylinder in Example 1.

[0040] Figure 6 This is a schematic diagram of the top view of the first inner cylinder in Example 1.

[0041] Figure 7 This is a schematic diagram of the cross-sectional structure of the second inner cylinder in Example 1.

[0042] Figure 8 This is a schematic diagram of the top view of the second inner cylinder in Example 1.

[0043] Figure 9 This is a schematic diagram of the cross-sectional structure of the third inner cylinder in Example 1.

[0044] Figure 10 This is a schematic diagram of the top view of the third inner cylinder in Example 1.

[0045] Figure 11 This is a schematic diagram of the cross-sectional structure of the central column in Example 1.

[0046] Figure 12 This is a schematic diagram of the top view of the central column in Example 1.

[0047] Figure 13 This is a schematic diagram of the bottom-up structure of the central column in Example 1.

[0048] Figure 14 for Figure 11 Schematic diagram of the cross-sectional structure at AA in the middle.

[0049] Figure 15 The following is a schematic diagram showing the radial correspondence between the teeth on the outer cylinder and the teeth on each inner cylinder.

[0050] Figure 16 Schematic diagram of the cross-sectional structure of the lower diverter of Example 2.

[0051] Figure 17 for Figure 16 Schematic diagram of the cross-sectional structure at BB in the middle.

[0052] Figure 18 This is a schematic diagram of the top view of the lower outer cylinder of Example 2.

[0053] Figure 19 This is a schematic diagram of the top view of the first inner cylinder in Example 2.

[0054] Figure 20 This is a schematic diagram of the top view of the second inner cylinder in Example 2.

[0055] Figure 21 This is a schematic diagram of the top view of the third inner cylinder in Example 2.

[0056] Figure 22 This is a schematic diagram of the top view of the lower center column of Example 2.

[0057] Figure 23 This is a schematic diagram of the cross-sectional structure of the second inner cylinder in Example 3.

[0058] Figure 24 This is a schematic diagram of the matching relationship between the second inner cylinder and the first inner cylinder and the third inner cylinder in Example 3.

[0059] Figure 25 Schematic diagram of the arrangement structure of the diverter in the reaction tank in Example 4.

[0060] Figure 26 This is a schematic diagram of the top view of the microbial carrier filler used in this patent solution.

[0061] Figure 27 This is a schematic diagram A of the second embodiment, showing that the teeth of the inner tooth portion or the outer tooth portion of each layer are alternately staggered in the axial direction.

[0062] Figure 28 This is a schematic diagram B of the second embodiment, showing that the teeth of the inner tooth portion or the outer tooth portion of each layer are alternately staggered in the axial direction.

[0063] In the figure: 100 reaction tank, 101 water inlet; 200 aeration assembly, 201 lower aeration unit, 202 middle aeration unit, 203 upper aeration unit; 300 diverter, 301 outer ring channel, 302 inner ring channel; 400 base, 401 partition, 402 radial flange; 500 spoiler; 600 mesh plate;

[0064] 10 outer cylinder, 11 annular flange, 12 first radial groove; 20 first inner cylinder, 21 first support arm; 30 second inner cylinder, 31 second support arm, 32 second radial groove; 40 third inner cylinder, 41 third support arm; 50 center column, 51 fourth support arm, 52 third radial groove, 53 through hole, 54 annular countersunk hole, 541 guide hole; 60 crossbar; 70 air distribution pipe portion, 71 first pipe portion, 711 plug, 712 first air inlet pipe, 713 cavity, 72 second pipe portion, 721 axial pipe, 722 second air inlet pipe, 723 radial branch pipe; 80 microbial carrier filler, 81 curved plate, 82 elastic connecting plate, 83 nest hole;

[0065] 1 inner tooth portion, 1a inner tooth portion A, 1b inner tooth portion B; 2 outer tooth portion, 2a outer tooth portion A, 2b outer tooth portion B; 3 arc-shaped cavity. DETAILED DESCRIPTION

[0066] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "front", "back", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content. In addition, the longitudinal and axial directions referred to in this patent are directions extending along the Y-axis, and the positive extension direction of the Y-axis is upward, and the negative extension direction is downward. The transverse direction refers to the direction on the XZ plane or parallel to the XZ plane (the radial direction of the outer cylinder 10 is on the XZ plane or parallel to the XZ plane), and the positive extension direction along the Z-axis is inside, and the negative extension direction is outside.

[0067] like Figures 1 to 28The construction wastewater treatment system shown includes a reaction tank 100 , an aeration assembly 200 , and a diverter 300 and a base 400 provided in the reaction tank 100 .

[0068] The construction wastewater treatment system involved may also include a circulating pump system arranged outside the reaction tank 100 for promoting the upward and downward circulation of the water in the reaction tank 100, a sewage pool connected to the water inlet 101 arranged at the lower part of the reaction tank 100 through a pipeline and a peristaltic pump and / or a booster pump arranged on the pipeline, a sedimentation tank connected to the drain outlet arranged at the upper part of the reaction tank 100, a water outlet, a microorganism dispenser and associated pipelines, a microorganism carrier filler dispenser and associated pipelines, a biofilm removal unit and associated pipelines, etc., as well as auxiliary facilities such as power distribution facilities and control facilities, although they are not shown in the figure, it does not mean that they are not available or not needed. Those skilled in the art can adaptively choose to use this part based on the existing technology and in combination with the design features of this patent, so they are not described in detail.

[0069] In this patent solution, the aeration assembly 200 includes a lower aeration unit 201, a middle aeration unit 202, and an upper aeration unit 203. The diverter 300 includes an outer cylinder 10, a first inner cylinder 20, a second inner cylinder 30, and a third inner cylinder 40 (at least one inner cylinder is required), and a central column 50.

[0070] The outer cylinder 10, each inner cylinder and the center column 50 are coaxially assembled and arranged so that radial spacing is formed between the inner circumference of the outer cylinder 10 and the outer circumference of the first inner cylinder 20, between the inner and outer circumferences of each inner cylinder, and between the outer circumference of the center column 50 and the inner circumference of the third inner cylinder 40, thereby forming an annular channel (including the outer ring channel 301 and the inner ring channel 302 shown in the figure) that is axially continuous. Figure 1 、 Figure 16 As shown, the first inner cylinder 20 is placed in the outer cylinder 10, the second inner cylinder 30 is placed in the first inner cylinder 20, the third inner cylinder 40 is placed in the second inner cylinder 30, and the center column 50 is placed in the third inner cylinder 40. A radial spacing is formed between the opposing circumferential surfaces of the first inner cylinder 20 and the outer cylinder 10, between the opposing circumferential surfaces of the second inner cylinder 30 and the first inner cylinder 20, between the opposing circumferential surfaces of the third inner cylinder 40 and the second inner cylinder 30, and between the opposing circumferential surfaces of the center column 50 and the third inner cylinder 40, thereby forming two annular channels, an outer ring channel 301 and an inner ring channel 302, which extend axially therethrough.

[0071] A plurality of inner teeth 1 are formed on the inner circumference of the outer cylinder 10 and are distributed alternately in the axial direction. A plurality of outer teeth 2 are formed on the outer circumference of the center column 50 and are distributed alternately in the axial direction. A plurality of outer teeth 2 are formed on the outer circumference of each inner cylinder and a plurality of inner teeth 1 are formed on the inner circumference. The inner teeth 1 and the outer teeth 2 both protrude radially outward and the layers of inner teeth 1 and outer teeth 2 on the adjacent / opposite inner and outer circumferences are arranged in an upper and lower staggered relative state. A (radial) spacing is formed between the protruding tip of the inner teeth 1 and the adjacent outer circumference (wall), and a (radial) spacing is formed between the protruding tip of the outer teeth 2 and the adjacent inner circumference (wall). In detail, as Figure 1 、 Figures 3 to 11 、 Figures 16 to 24 As shown, the outer circumferences of the first inner cylinder 20, the second inner cylinder 30, and the third inner cylinder 40 are each formed with a plurality of external teeth 2 spaced apart in the axial direction, and the inner circumferences thereof are each formed with a plurality of internal teeth 1 spaced apart in the axial direction. The layers of internal teeth 1 and layers of external teeth 2 on the multiple pairs of adjacent / opposing circumferences between the outer cylinder 10, each inner cylinder, and the center column 50 are arranged in a vertically staggered relative configuration.

[0072] The base 400 is fixed in the tank cavity of the reaction tank 100, and the lower ends of the outer cylinder 10, each inner cylinder and the central column 50 on the diverter 300 are in contact with the upper end surface of the base 400, so that the diverter 300 can stand on the upper end surface of the base 400 and be suspended in the tank cavity.

[0073] The aeration pipe openings of the lower aeration unit 201 are arranged above the inner port of the water inlet 101. The aeration pipe openings of the upper aeration unit 203 are arranged above the upper port of the annular channel of the diverter 300.

[0074] In the above solution, the microorganism carrier filler 80 for carrying microorganisms can be placed in the entire tank cavity of the reaction tank 100, or can be mainly placed in the tank cavity area of the reaction tank 100 located above and below the diverter 300.

[0075] As the oxygen-containing bubbles ejected from the lower aeration unit 201 flow upward from the lower portion of the reactor tank 100 along with the (preliminarily treated) sewage / wastewater, they pass through the diverter 300 and flow upward through the annular channel formed between the opposing circumferential surfaces of the outer cylinder 10, the inner cylinder, and the central column 50 of the diverter 300. As they flow upward through the annular channel (the outer ring channel 301 and the inner ring channel 302 shown in the figure), they are subjected to the alternating flow obstruction and cutting action of the inner and outer teeth 1 and 2. This not only changes the flow direction of the liquid and reduces the axial flow velocity, but also cuts the bubbles mixed in the liquid to continuously generate smaller bubbles and microbubbles, thereby enhancing the mixing and mass transfer of oxygen and sewage. Therefore, this patented solution improves the mass transfer and mixing effects of aeration and water bodies, so that the difficult-to-degrade organic matter in the water body can be fully transferred and mixed with the microbial carrier in a fluidized state under sufficient aeration conditions, and can provide more sufficient dissolved oxygen for a large number of microorganisms adsorbed on the microbial carrier filler 80, thereby achieving the purpose of oxidative decomposition of (small molecule) organic matter by microorganisms under high dissolved oxygen conditions.

[0076] Example 1: Figures 1 to 15 As shown, the inner tooth portion 1 and the outer tooth portion 2 are annular and are annular radial flanges. Figures 3 to 14 In the figure, the inner tooth portion A1a and the outer tooth portion A2a are shown. As shown in the figure, the cross section of the inner tooth portion A1a and the cross section of the outer tooth portion A2a are both triangular.

[0077] The "radial flange" referred to here can be understood as a situation where the outward protruding extension direction of the radial flange is consistent with the radial direction of the outer tube 10, inner tube or center column 50 (see the figure); it can also be understood as a situation where the radial flange extends upward or downward relative to the radial direction of the outer tube 10, inner tube or center column 50.

[0078] like Figure 15As shown, the maximum outer diameter / tip outer diameter D1 of the inner tooth portion A1a on the outer cylinder 10 is larger than the maximum outer diameter / tip outer diameter D2 of the outer tooth portion A2a above or below it on the first inner cylinder 20. Therefore, after the outer cylinder 10 and the first inner cylinder 20 are coaxially mounted together, there will be partial obstruction and overlap (top view projection) between the inner tooth portion A1a and the outer tooth portion A2a opposite to each other on the two circumferential surfaces in the transverse / radial direction, which can cause the flow direction and speed of the water body to change, and the tips and edges of the teeth will also shear the water body, and cut the bubbles dissolved in the water body into smaller bubbles and microbubbles, which helps to promote the mixing and mass transfer effect of the water body and dissolved oxygen. Similarly, the tip inner diameter d1 of the inner tooth portion A1a on the first inner cylinder 20 is larger than the maximum outer diameter / tip outer diameter D3 of the outer tooth portion A2a located above or below it on the second inner cylinder 30. Therefore, after the first inner cylinder 20 and the second inner cylinder 30 are coaxially mounted together, there will be partial obstruction and overlap between the inner tooth portion A1a and the outer tooth portion A2a on the two circumferential surfaces in the transverse / radial direction (top view projection); the tip inner diameter d2 of the inner tooth portion A1a on the second inner cylinder 30 is larger than the maximum outer diameter / tip outer diameter D4 of the outer tooth portion A2a located above or below it on the third inner cylinder 40. Therefore After the second inner cylinder 30 and the third inner cylinder 40 are coaxially mounted together, the inner teeth A1a and outer teeth A2a on the two circumferential surfaces will partially block and overlap in the transverse / radial directions (top view projection). The inner diameter d3 of the tip of the inner teeth A1a on the third inner cylinder 40 is greater than the maximum outer diameter / tip outer diameter D5 of the outer teeth A2a above or below it on the center column 50. Therefore, after the third inner cylinder 40 and the center column 50 are coaxially mounted together, the inner teeth A1a and outer teeth A2a on the two circumferential surfaces will partially block and overlap in the transverse / radial directions (top view projection). The upper and lower blocking and overlapping arrangement formed between the teeth (inner teeth A1a and outer teeth A2a) on the relative inner / outer circumferential surfaces can cause the flow direction and speed of the water to change. The tips and edges of the teeth also shear the water, cutting the bubbles dissolved in the water into smaller bubbles and microbubbles, which helps promote the mixing and mass transfer of water and dissolved oxygen.

[0079] A spoiler 500 is installed within the reaction tank 100, corresponding to and above the water inlet 101. The spoiler 500's end faces downward, allowing the upper end of the water inlet 101 to be inserted into the spoiler 500. The lower end of the spoiler 500 features a tapered, flared design, which promotes lateral dispersion of the water and enhances mixing of the oxygen-containing gas ejected from the lower aeration unit 201 with the water.

[0080] The base 400 is annular, with a radial flange 402 formed on the lower portion of its inner wall. The ends of the partition 401 are connected to the radial flange 402. The lower ends of the outer cylinder 10, inner cylinder, and center column 50 contact the upper end surface of the partition 401. The lower end of the outer cylinder 10 is inserted into the axial flange formed on the upper end of the base 400, and the two are fixed together by bolts. The inner hole of the base 400 corresponds to directly below the outer ring channel 301 and the inner ring channel 302. The inner diameter of the base 400 is preferably larger than the outer inner diameter / maximum inner diameter of the outer ring channel 301.

[0081] The upper end surfaces of the first inner cylinder 20 and the third inner cylinder 40 are recessed downward relative to the upper end surfaces of the outer cylinder 10, the second inner cylinder 30, and the upper end surface of the center column 50 (the lowermost upper end surface). The upper end surfaces of the outer cylinder 10, the second inner cylinder 30, and the center column 50 can be flush or have a height difference. Radial grooves are formed on the upper end surfaces of the outer cylinder 10, the second inner cylinder 30, and the center column 50, respectively. These grooves are arranged along the same radial direction. A crossbar 60 is inserted into each of the first, second, and third radial grooves 12, 32, and 52, connecting the outer cylinder 10, the second inner cylinder 30, and the center column 50 (upper portion) into a single unit. Therefore, the first inner barrel 20 and the third inner barrel 40 have a certain swimming ability in the axial direction and the radial direction, which helps to promote the disturbance effect on the water body, so that the flow direction and flow speed of the water body change irregularly and rapidly, thereby improving the mixed mass transfer effect of the water body and dissolved oxygen / bubbles.

[0082] A downwardly extending annular flange 11 is formed at the lower end of the outer tube 10. Multiple support arms are formed at the lower end of each inner tube: a first support arm 21 formed at the lower portion of the first inner tube 20, a second support arm 31 formed at the lower portion of the second inner tube 30, and a third support arm 41 formed at the lower portion of the third inner tube 40. Each of these support arms extends downward and is spaced alternately around the circumference. Furthermore, a fourth support arm 51 is formed at the lower portion of the central column 50 and extends downward.

[0083] The lower end of the annular flange 11 and the lower ends of each support arm contact the upper end surfaces of the spacers 401 spaced alternately on the base 400, allowing the outer cylinder 10, inner cylinder, and center column 50 to stand on the base 400, respectively. An axial distance / space is formed between the lower end surface of the diverter 300 (or the outer cylinder 10, inner cylinder, center column 50) and the upper end surface of the base 400, thereby promoting the radial / lateral fluidity of the water near the lower end of the diverter 300 and ensuring the unit flow rate of the water when flowing upward. This improved structure, combined with the aforementioned feature of providing the first inner cylinder 20 and the third inner barrel 40 with a certain degree of mobility in both the axial and radial directions, can enhance the overall upward flow capacity and unit flow rate of the water, and extend the path of water disturbance, that is, the disturbance of the water begins near the lower portion of the diverter 300.

[0084] A plurality of arc-shaped cavities 3 are formed on the inner wall of the outer cylinder 10 and the outer wall of the central column 50. The aeration pipe openings of the intermediate aeration unit 202 extend into each arc-shaped cavity 3.

[0085] The multiple arc-shaped cavities 3 distributed on the inner wall of the outer cylinder 10 and the outer wall of the central column 50 are divided into multiple groups, each group includes multiple arc-shaped cavities 3 and the number of arc-shaped cavities 3 in each group is the same (the number can also be different during implementation). Each group of arc-shaped cavities 3 is divided into multiple layers in the axial direction, and the arc-shaped cavities of the two adjacent layers are in a corresponding relationship of directly above and directly below. During implementation, the arc-shaped cavities 3 of the two adjacent layers can also be arranged in an upper and lower staggered manner, that is, the top projections of the arc-shaped cavities 3 of the two adjacent layers can partially overlap. When multiple layers of arc-shaped cavities 3 are provided, an intermediate aeration unit 202 is configured for each layer of arc-shaped cavities 3, so that the aeration pipe openings of the intermediate aeration unit 202 extend into the arc-shaped cavities 3 of each layer.

[0086] Embodiment 2: The main difference between this embodiment and embodiment 1 is mainly reflected in the specific forms of the inner tooth portion 1 and the outer tooth portion 2. Other structural features are basically the same and will not be repeated here.

[0087] The inner tooth portion 1 and the outer tooth portion 2 are both composed of multiple radial flange teeth distributed alternately around the circumference. Figures 16 to 22 In the figure, the inner tooth portion B1b and the outer tooth portion B2b are respectively represented. On the two opposite (inner and outer) circumferential surfaces, the radial flange teeth formed on the inner circumferential surface correspond to the upper or lower part of the circumferential gap between the two adjacent radial flange teeth formed on the outer circumferential surface, as shown in FIG. Figure 16 、 Figure 17. In other words, the radial flange teeth formed on the outer circumferential surface of the two opposite circumferential surfaces correspond to the upper or lower part of the circumferential gap between the two adjacent radial flange teeth formed on the inner circumferential surface. It should be noted that the radial flange teeth on the inner circumferential surface (hereinafter referred to as tooth a) correspond to the upper or lower part of the circumferential gap between the adjacent radial flange teeth (hereinafter referred to as tooth b) on the outer circumferential surface that matches / opposes it, including the situation where both ends of tooth a are completely in the gap between the two teeth b (such as Figure 17 ), and a situation in which at least one end of tooth a extends to directly above or directly below a tooth b.

[0088] like Figure 27 、 Figure 28 As shown, the radial flange teeth are arc-shaped elongated bodies or triangular pyramids extending in the circumferential direction, and the cross section of the arc-shaped elongated bodies is triangular.

[0089] Figure 27 、 Figure 28 The figure shows the inner or outer circumference of the outer cylinder 10, inner cylinder or central column 50 after unfolding (along the OO side line). As can be seen from the figure, the radial flange teeth constituting the inner tooth portion 1 or the outer tooth portion 2 in each layer are arranged in an alternating manner, that is, there is a certain height difference between two adjacent radial flange teeth, and the size of the height difference can be as follows: Figure 27 、 Figure 28 As shown, there can be an intersection between the upper and lower portions of two adjacent radial flange teeth; alternatively, there can be no intersection or overlap between the upper and lower portions of two adjacent radial flange teeth. The aforementioned cross-arrangement of radial flange teeth can, on the one hand, enhance the ability of water to flow vertically upward within the tank cavity, reducing resistance; on the other hand, it can increase the degree of shearing of the water and bubbles, forming more microbubbles, enhancing the agitation effect on the water, and further promoting the dissolved oxygen rate in the water, i.e., the uniformity of mixing of microbubbles and water. This can better provide sufficient dissolved oxygen for the large number of microorganisms adsorbed on the microbial carrier seasoning 80, thereby achieving the purpose of oxidative decomposition of organic matter in the water by microorganisms under high dissolved oxygen conditions.

[0090] The two aforementioned embodiments also include an air distribution pipe section 70, which comprises a first pipe section 71 and a second pipe section 72. The first pipe section 71 corresponds to and mates with the arcuate cavities 3 formed on the central column 50, allowing air to be diffused into each of the arcuate cavities 3 disposed on the outer circumference of the central column 50. The second pipe section 72 corresponds to and mates with four radial branch pipes 723 extending downwardly into the annular flange 11.

[0091] The first pipe portion 71 includes a plug 711 and a first air inlet pipe 712. A cavity 713 is formed in the body of the plug 711, and an annular port is formed at the lower end of the cavity 713. One end of the first air inlet pipe 712 passes through the channel of the crossbar 60 and into the cavity 713, establishing communication between an intermediate aeration unit 202 of the aeration assembly 200 and the cavity 713 through the first air inlet pipe 712.

[0092] An annular countersunk hole 54 extending axially downward is formed on the center column 50, so that the lower end of the annular countersunk hole 54 extends to a position at a height equivalent to the arc groove 3 provided on the outer peripheral surface of the center column 50, and a through hole 541 is provided at the lower part of the wall of the annular countersunk hole 54 to connect the annular countersunk hole 54 with the arc groove 3 (see FIG. Figure 14 When the plug 711 is fixed to the crossbar 60 and the crossbar 60 is fixed to the upper portion of the center column 50 , the lower annular port of the cavity 713 and the upper annular port of the annular counterbore 54 can be plugged in relative to each other to establish a communication relationship.

[0093] The second pipe portion 72 comprises an axial tube 721 and a second air inlet pipe 722. The second air inlet pipe 722 is inserted into a cavity formed in the crossbar 60, with its inner end aligned with the upper portion of the center column 50. A through hole 53 is formed along the axis of the center column 50, into which the axial tube 721 is inserted. The upper end of the axial tube 721 connects to the inner end of the second air inlet pipe 722, while the outer end of the second air inlet pipe 722 connects to one of the aeration units. The lower end of the axial tube 721 extends to the lower portion of the diverter 300, below the lower end of the annular channel. It connects to four radial branches 723, which are spaced alternately around the circumference. The radial branches 723 extend throughout the entire radial extent of the annular channel and are characterized by multiple aeration orifices distributed along their walls. The radial branches 723 extend laterally from the spaces between the support arms provided on the inner tube and the center column.

[0094] The provision of the intermediate aeration unit 202 can further replenish oxygen-containing gas and increase the dissolved oxygen content in the water. It can also promote upward water flow by leveraging the buoyant lift of bubbles generated by the intermediate aeration unit 202, thereby reducing the energy consumption associated with this upward flow. The primary purpose of the upper aeration unit 203 is to achieve this latter function. Because the bubbles generated by the intermediate aeration unit 202 are dispersed within the arc-shaped cavity 3 formed within the diverter 300 (at least at the middle and lower elevations of the diverter 300), the bubbles can rapidly diffuse laterally into the annular channel (either the outer channel 301 or the inner channel). As the water flows, they are rapidly mixed with the water and sheared and fragmented by the inner and outer teeth 1 and 2 to produce more small bubbles and microbubbles, further increasing the dissolved oxygen content in the water and enhancing the mixing and mass transfer between the aeration system and the water.

[0095] The aeration assembly 200, divided into a lower aeration unit 201, multiple middle aeration units 202, and an upper aeration unit 203, can improve aeration utilization. Specifically, the aeration assembly 200 can control the amount of aeration distributed to the upper, middle, and lower height positions, thereby improving aeration utilization and efficiency and reducing waste.

[0096] Example 3: Figure 23 、 Figure 24 As shown, compared with the above two embodiments, the main change is the overall shape of the second inner cylinder 30, so that the outer circumferential surface and the inner circumferential surface of the second inner cylinder 30 are changed from cylindrical surfaces to conical surfaces.

[0097] During the implementation of this patent, at least the outer circumference or inner circumference of the second inner cylinder 30 must be formed into a conical surface. Specifically, the outer circumference of the second inner cylinder 30 is a conical surface with the large diameter end of the conical surface facing upward; the inner circumference of the second inner cylinder 30 is a conical surface with the large diameter end of the conical surface facing downward. (In a static state) After the second inner cylinder 30 is installed in the first inner cylinder 20, the radial distance between the relative circumferences of the two gradually decreases from bottom to top. Greater than After the third inner cylinder 40 is installed in the second inner cylinder 30, the radial distance between the relative circumferences of the two cylinders gradually decreases from bottom to top. Greater than

[0098] The solution of the above-mentioned embodiment can further enhance the water disturbance effect, making the upward flow of water more turbulent, and better shearing dissolved oxygen bubbles into microbubbles and fully mixing them with the water. In addition, this embodiment, combined with the aforementioned feature of providing the first inner barrel 20 and the third inner barrel 40 with a certain degree of mobility in both the axial and radial directions, can enhance the radial / lateral mobility of the first inner barrel 20 and the third inner barrel 40, and enable a certain amplitude of oscillation at the upper and lower ends. This not only improves the overall upward flow capacity and unit flow rate of the water, extending the path of water disturbance, but also further enhances the flow disturbance capacity, thereby helping to improve the mixing and mass transfer effect between the water and aeration, increase the dissolved oxygen content in the water, and better provide sufficient and sufficient oxygen for microorganisms.

[0099] Example 4: Figure 25 As shown, a plurality of flow diverters 300 are fixedly mounted on the base 400, arranged in three layers, alternating between upper and lower layers. The plurality of intermediate aeration units 202 of the aeration assembly 200 are disposed between two adjacent flow diverters 300. Microbial carrier fillers 80 (not shown) carrying microorganisms are placed in the reaction tank 100 cavity between at least two adjacent flow diverters 300.

[0100] For each layer of the flow divider 300, the number of inner teeth 1 and outer teeth 2 distributed on the circumference of the outer cylinder 10, inner cylinder, and center column 50 should be controlled to be at least 3 layers, preferably 5 to 8 layers. The axial spacing between adjacent layers is preferably controlled between 1 and 5 times the thickness of the inner teeth 1 or the thickness of the outer teeth 2, and does not exceed 10 times. The requirements for setting the axial spacing between the inner teeth 1 and the outer teeth 2 of two adjacent layers are also applicable to the solutions of Examples 1 to 3.

[0101] Compared to the previous embodiment, the above embodiment reduces the axial height of the diverters 300 while increasing their number. This significantly reduces the resistance to upward water flow and energy consumption. Furthermore, it enhances the mixing and mass transfer between the water and the aeration system (compared to existing technologies), allowing for sufficient mass transfer and mixing between difficult-to-degrade organic matter in the water and the fluidized microbial carriers under adequate aeration conditions. This provides sufficient dissolved oxygen for the numerous microorganisms attached to the carriers, enabling the microorganisms to oxidize and decompose organic matter in the water under high dissolved oxygen conditions.

[0102] like Figure 26Figure 2 shows a schematic diagram of a microbial carrier packing 80 structure that is more suitable for use in the aforementioned embodiments. The microbial carrier packing 80 comprises three layers of annular frames surrounding a central ring. Each layer of the arcuate frame assembly includes four arcuate frames, which are spaced alternately around the circumference. Nests 83 are formed within the central ring and the arcuate frames, and a large number of microorganisms are attached to the surfaces of the nests 83.

[0103] The arc frame comprises an arc plate 81 and elastic connecting plates 82 at either end of the plate. The elastic connecting plates 82 are wavy and capable of elastic deformation radially and circumferentially along the center ring (of the microorganism carrier filler 80). The elastic connecting plates 82 at either end of the outer arc frame are connected to the middle of the arc plates of the two adjacent inner arc frames or to the outer circumference of the center ring.

[0104] The arc-shaped frames of each layer are staggeredly connected by a wavy elastic connecting plate 82 to form an integral microbial carrier filler 80, which can give the microbial carrier filler 80 a better ability to withstand impact. On the one hand, it can better ensure that the microorganisms attached to the microbial carrier filler 80 will not easily fall off the carrier due to impact; on the other hand, it can improve the situation where the microbial carrier filler 80 is broken due to impact, and can provide reliable and stable carrier conditions for the survival and attachment of microorganisms.

[0105] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept. Those skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed by the present invention shall be covered by the claims of the present invention.

Claims

1. A construction wastewater treatment system, characterized by: It includes a reaction tank (100), an aeration assembly (200), a diverter (300) and a base (400); The bottom of the tank cavity of the reaction tank (100) is provided with a water inlet (101); The aeration assembly (200) includes a lower aeration unit (201) and an upper aeration unit (203); The flow divider (300) comprises an outer cylinder (10), at least one inner cylinder, and a center column (50); the outer cylinder (10), the inner cylinder, and the center column (50) are coaxially assembled, and radial spacing is formed between the inner circumference of the outer cylinder (10) and the outer circumference of the inner cylinder, and between the outer circumference of the center column (50) and the inner circumference of the inner cylinder, thereby forming an annular channel that passes through in the axial direction; a plurality of inner teeth (1) are formed on the inner circumference of the outer cylinder (10); a plurality of inner teeth (1) are formed on the outer circumference of the inner cylinder. A plurality of external teeth (2), a plurality of internal teeth (1) distributed alternately in the axial direction are formed on the inner peripheral surface; a plurality of external teeth (2) distributed alternately in the axial direction are formed on the outer peripheral surface of the center column (50); the internal teeth (1) and the external teeth (2) are both radially protruding, and the layers of internal teeth (1) and layers of external teeth (2) on the adjacent inner peripheral surface and outer peripheral surface are arranged in an upper and lower staggered manner; a spacing is formed between the protruding tip of the internal teeth (1) and the adjacent outer peripheral surface, and a spacing is formed between the protruding tip of the external teeth (2) and the adjacent inner peripheral surface; The base (400) is fixed in the tank cavity of the reaction tank (100), and the lower ends of the outer cylinder (10), the inner cylinder, and the center column (50) on the diverter (300) are in contact with the base (400), so that the diverter (300) is suspended in the tank cavity; The aeration pipe openings of the lower aeration unit (201) are distributed above the inner port of the water inlet (101); The aeration pipe openings of the upper aeration unit (203) are distributed above the upper port of the annular channel on the diverter (300); A plurality of diverters (300) are fixedly provided on the base (400), and the diverters (300) are arranged alternately in layers up and down; The aeration assembly (200) further includes a plurality of intermediate aeration units (202), and each intermediate aeration unit (202) is correspondingly configured between two adjacent diverters (300); A microbial carrier filler (80) carrying microorganisms is placed in the tank cavity of at least the reaction tank (100) between two adjacent diverters (300); The microorganism carrier filler (80) includes three layers of annular frame groups surrounding the periphery of a central ring, each layer of the annular frame group includes four arc-shaped frames, and the four arc-shaped frames are alternately distributed around the circumference; a nest hole (83) structure for microorganisms to attach is formed in the central ring and the arc-shaped frames; The arc frame includes an arc plate (81) and elastic connecting plates (82) arranged at both ends of the arc plate (81); the elastic connecting plates (82) are wavy and can generate elastic deformation along the radial direction of the center ring and elastic deformation along the circumferential direction; the elastic connecting plates (82) at both ends of the arc frame on the outer layer are respectively connected to the middle parts of the arc plates of the two adjacent arc frames on the inner side thereof; the elastic connecting plates (82) connect the arc frames of each layer in an interlaced manner to form an integral microorganism carrier filler (80).

2. The construction wastewater treatment system according to claim 1, characterized in that: A downwardly extending annular flange (11) is formed at the lower end of the outer cylinder (10); a plurality of support arms are formed at the lower end of the inner cylinder, the support arms extending downward and being alternately distributed around the circumference; a support arm is formed at the lower portion of the central column (50), and the support arm extends downward; the lower ends of the annular flange (11) and the lower ends of the support arms are in contact with partitions (401) alternately distributed on the base (400), so that the outer cylinder (10), the inner cylinder and the central column (50) can stand on the base (400) respectively.

3. The construction wastewater treatment system according to claim 1, characterized in that: The inner cylinder comprises a first inner cylinder (20), a second inner cylinder (30) and a third inner cylinder (40), wherein the first inner cylinder (20) is placed in the outer cylinder (10), the second inner cylinder (30) is placed in the first inner cylinder (20), the third inner cylinder (40) is placed in the second inner cylinder (30), and the center column (50) is placed in the third inner cylinder (40); radial spacing is formed between the relative circumferential surfaces of the first inner cylinder (20) and the outer cylinder (10), between the relative circumferential surfaces of the second inner cylinder (30) and the first inner cylinder (20), between the relative circumferential surfaces of the third inner cylinder (40) and the second inner cylinder (30), and between the relative circumferential surfaces of the center column (50) and the third inner cylinder (40), thereby forming an outer ring channel (301) and an inner ring channel (302) that are axially continuous; A plurality of external teeth (2) distributed alternately in the axial direction are formed on the outer circumferential surfaces of the first inner cylinder (20), the second inner cylinder (30) and the third inner cylinder (40), and a plurality of internal teeth (1) distributed alternately in the axial direction are formed on the inner circumferential surfaces; the layers of internal teeth (1) and the layers of external teeth (2) on the multiple pairs of adjacent circumferential surfaces between the outer cylinder (10), the inner cylinders and the central column (50) are arranged in a relative state of being staggered up and down.

4. The construction wastewater treatment system according to claim 3, characterized in that: The upper end surfaces of the first inner cylinder (20) and the third inner cylinder (40) are retracted downward relative to the upper end surface of the outer cylinder (10), the upper end surface of the second inner cylinder (30), and the upper end surface of the center column (50); radial grooves are formed on the upper end surfaces of the outer cylinder (10), the second inner cylinder (30), and the center column (50), so that the radial grooves are arranged along the same radial direction; a cross bar (60) is inserted into the radial groove to connect the outer cylinder (10), the second inner cylinder (30), and the center column (50) into a whole.

5. The construction wastewater treatment system according to claim 1, characterized in that: The inner tooth portion (1) and / or the outer tooth portion (2) are both annular and formed as an annular radial flange.

6. The construction wastewater treatment system according to claim 1, characterized in that: The inner tooth portion (1) and the outer tooth portion (2) are both a plurality of radial flange teeth distributed alternately around the circumference; The radial flange teeth formed on the inner circumferential surface of the two opposite circumferential surfaces are correspondingly arranged above or below the circumferential gap between two adjacent radial flange teeth formed on the outer circumferential surface.

7. The construction wastewater treatment system according to claim 6, characterized in that: The radial flange teeth are arc-shaped elongated strips or pyramids extending in the circumferential direction.

8. The construction wastewater treatment system according to any one of claims 1 to 7, characterized in that: A through hole (53) is formed along the axis of the central column (50), and an axial tube (721) is inserted into the through hole; the upper end of the axial tube (721) is connected to the inner end of the air inlet pipe, and the outer end of the air inlet pipe is connected to the aeration assembly (200); the lower end of the axial tube (721) extends to the lower part of the diverter (300) and is located below the lower end of the annular channel, and is connected to a plurality of radial branch pipes (723), and the plurality of radial branch pipes (723) are alternately distributed around the circumference; the radial branch pipes (723) penetrate the entire radial extension area of the annular channel, and a plurality of aeration nozzles are distributed on the tube wall of the radial branch pipe (723).

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