Fluidized bed biofilm reactor system

Abstract

A fluidized bed biofilm reactor system includes a tank, a first pipe, a second pipe, a first flow guide, a second flow guide, and a return pipe. The first pipe and the second pipe form a reaction zone in the tank, and the first flow guide and the second flow guide form a solid / liquid / gas three-phase separation zone in the tank. The first pipe and the second pipe form a multi-layer horizontal water curtain disturbance reaction, which mixes pollutants in the fluid of the reaction zone uniformly, accelerates gas removal in the biological carrier, increases the chance of microorganisms attaching to the biological carrier, and guides the gas phase discharge of the reaction, so as to facilitate fluid treatment of an anaerobic biological process.

Description

Technical Field

[0001] This invention relates to the field of fluid treatment technology, and more particularly to a fluidized bed biofilm reactor system that improves the efficiency of anaerobic biological treatment processes by addressing the problems of biomass flotation and short-circuiting in the reactor. Background Technology

[0002] With the rapid development of global science and technology and the booming development of various industries, technological progress has also raised people's awareness of the environment, and water resources are an issue that cannot be ignored. Among water treatment technologies, biological treatment technology plays a very important role, with advantages such as no need to add chemical agents, environmental friendliness, and wide application. Among them, moving bed biofilm reactor (MBBR) technology is one of the mainstream biological treatment technologies of the future.

[0003] Flow bed biofilm reactor technology utilizes the diverse microbial communities on the biofilm of a biological support to biologically treat target fluids (e.g., water, especially wastewater) in aerobic / anoxic / anaerobic environments.

[0004] However, a major drawback of conventional flowing bed biofilm reactor technology is that the floating of the biofilm carrier causes short-circuiting in the reactor, affecting the efficiency of the anaerobic biological treatment process. To address this, operators must increase aeration requirements and add additional carbon sources, such as using fan blades to agitate the biofilm carrier and improve its uniform distribution within the reactor. This not only increases energy and cost but also leads to insufficient site space. The aforementioned short-circuiting refers to the fluid flowing without a designed trajectory, creating shortcuts and short streamlines. When short-circuiting occurs, uneven mixing of reactants is likely to occur.

[0005] Therefore, how to develop a "fluidized bed biofilm reactor system" that improves the floating of biological carriers and the short-circuiting of the reactor, thereby enhancing the efficiency of anaerobic biological treatment processes, is an issue that needs to be addressed by researchers in related technical fields. Summary of the Invention

[0006] In one embodiment, the present invention provides a fluidized bed biofilm reaction system suitable for fluid processing, the system comprising:

[0007] A tank body consists of a cylindrical tank body, a tank bottom located at the bottom of the tank body, and a tank top located at the top of the tank body. The interior forms a space for accommodating the biological support. The tank body is provided with a water outlet and an air outlet.

[0008] A first tube has multiple first holes that radially penetrate the first tube. The axial direction of the first tube is parallel to the horizontal plane and penetrates the tank. The multiple first holes are located inside the tank and are used to introduce fluid from the outside of the tank into the tank. The horizontal position of the center of each first hole is equal to or lower than the horizontal position of the axial direction of the first tube.

[0009] At least one second tube has a plurality of second holes that radially penetrate the second tube. The axis of the second tube penetrates the groove parallel to the horizontal plane. The plurality of second holes are located in the groove. The second tube is positioned above the first tube at a distance from the first tube. The horizontal position of the center of each second hole is equal to or lower than the horizontal position of the second axis of the second tube.

[0010] A first flow guiding device, disposed within the tank, comprises:

[0011] A first partition plate, which is flat and has its bottom surface facing the second tube body and is disposed above the second tube body at a distance from the second tube body. The first partition plate is provided with at least one first guide hole and a plurality of first separation holes that penetrate the first partition plate vertically.

[0012] A first longitudinal plate, which is flat, is disposed on the top surface of the first partition plate. It has a first surface and a second surface facing the inner wall of the tank body respectively. A first guide hole and a plurality of first separation holes are located on the side of the first longitudinal plate with the first surface. The distance between the first guide hole and the first longitudinal plate is greater than the distance between the plurality of first separation holes and the first longitudinal plate.

[0013] At least one first conduit has multiple third holes that radially penetrate the first conduit. The first conduit is axially perpendicular to the horizontal plane and is disposed at the bottom of the first partition. The top end of the first conduit is connected to the first guide hole, and the bottom end of the first conduit is closed.

[0014] A first baffle, which is flat and has its top surface facing the first conduit and is disposed below the first conduit at a distance from the bottom end of the first conduit. The bottom of the first baffle is disposed above the second conduit at a distance from the second conduit.

[0015] A second flow guiding device, disposed within the tank and located above the first flow guiding device, comprises:

[0016] A second partition plate, which is flat, is disposed above the first partition plate with its bottom surface facing the top surface of the first partition plate and having a distance between it and the first partition plate. There is a distance between the bottom of the second partition plate and the top of the first longitudinal plate. The second partition plate is provided with at least one second guide hole and a plurality of second separation holes that penetrate the second partition plate vertically.

[0017] A second longitudinal plate, in the shape of a flat plate, is disposed on the top surface of the second partition. It has a third side and a fourth side facing the inner wall of the tank body respectively, and the third side faces the water outlet. The second longitudinal plate has a through part that passes through the third side and the fourth side. The second guide hole is located on the side of the second longitudinal plate with the third side. Multiple second separation holes are located on the side of the second longitudinal plate with the four sides. The projection position of the second guide hole falls on the first guide hole. The top of the second longitudinal plate is connected to the top of the tank. The second partition, the third side, the top of the tank and the tank body constitute a water outlet space, and the water outlet space is connected to the water outlet. The second partition, the fourth side, the top of the tank and the tank body constitute an air outlet space.

[0018] At least one second conduit has multiple fourth holes that radially penetrate the second conduit. The axis of the second conduit is perpendicular to the horizontal plane and is disposed at the bottom of the second partition. The top end of the second conduit is connected to the second guide hole, and the bottom end of the second conduit is closed.

[0019] A second baffle, which is flat and has its top surface facing the second conduit and is disposed below the second conduit at a distance from the bottom end of the second conduit. There is a distance between the bottom of the second baffle and the top surface of the first baffle.

[0020] A return pipe is provided outside the tank body and connects the side of the first longitudinal plate with the first surface to the tank body, and the first pipe body and the second pipe body, respectively, to return the fluid in the space formed by the side of the first longitudinal plate with the first surface and the tank body to the first pipe body and the second pipe body.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the external structure of another embodiment of the present invention.

[0024] Figure 3 for Figure 2 A schematic diagram of the axial cross-sectional structure of the embodiment.

[0025] Figure 4 for Figure 2 A schematic diagram of the axial cross-sectional structure of the embodiment.

[0026] Figure 5 This is a schematic diagram of an embodiment of the distribution of the first holes in the first conduit of the present invention.

[0027] Figure 5A for Figure 5 A schematic diagram of the water curtain disturbance in the embodiment.

[0028] Figure 6 This is a schematic diagram of another embodiment of the first hole distribution of the first conduit of the present invention.

[0029] Figure 6A for Figure 6 A schematic diagram of the water curtain disturbance in the embodiment.

[0030] Figure 7A This is a top view of the first flow guiding device of the present invention.

[0031] Figure 7B This is a top view of the second flow guiding device of the present invention.

[0032] Figure 8A This is a top view of another embodiment of the first flow guiding device of the present invention.

[0033] Figure 8B This is a top view of another embodiment of the second flow guiding device of the present invention.

[0034] Figure 9 This is a schematic diagram of the working state of the fluid processing according to the present invention.

[0035] In the attached figures, the following labels are used:

[0036] 100,100A: Flow bed biofilm reaction system

[0037] 10: Tank

[0038] 11: Tank body

[0039] 12: Bottom of the tank

[0040] 13: Top of the trough

[0041] 14: Water outlet

[0042] 15: Vent

[0043] 16: Inner wall

[0044] 20:First tube body

[0045] 21: First hole

[0046] 22: Closed end

[0047] 30:Second tube body

[0048] 31: Second hole

[0049] 32: Closed end

[0050] 40: First flow guiding device

[0051] 41: First partition

[0052] 411: Bottom

[0053] 412: First guide hole

[0054] 413: First separation hole

[0055] 414: Top surface

[0056] 42: First longitudinal plate

[0057] 421: First Page

[0058] 422: Second page

[0059] 423: Top

[0060] 43: First catheter

[0061] 431: Third hole

[0062] 432: Top

[0063] 433: Bottom surface

[0064] 44: First baffle

[0065] 441: Top surface

[0066] 442: Bottom

[0067] 50: Second flow guiding device

[0068] 51: Second partition

[0069] 511: Bottom

[0070] 512: Second guide hole

[0071] 513: Second separation hole

[0072] 514: Top surface

[0073] 52: Second longitudinal plate

[0074] 521: The Third Side

[0075] 522: Fourth Page

[0076] 523: Through Section

[0077] 524: Top

[0078] 53: Second catheter

[0079] 531: Fourth Hole

[0080] 532: Top

[0081] 533: Bottom surface

[0082] 54: Second baffle

[0083] 541: Top surface

[0084] 542: Bottom

[0085] 60: Return pipe

[0086] BC: biological carrier

[0087] C 20 C 30 C 43 C 53 : Axial

[0088] D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14: Distance

[0089] DW: Wastewater

[0090] DW1: Treated wastewater

[0091] H: Horizontal plane

[0092] HT: Total Height

[0093] H 20 H 30 H WO Horizontal position

[0094] S 40 :space

[0095] S WO Water outlet space

[0096] S GO Vent space

[0097] θ1: First included angle

[0098] θ2: Second included angle Detailed Implementation

[0099] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0100] Please see Figure 1 As shown in one embodiment, the fluidized bed biofilm reaction system 100A of the present invention includes a tank 10, a first tube 20, a second tube 30, a first flow guiding device 40, a second flow guiding device 50, and a return pipe 60. A biosupport BC can be disposed within the tank 10.

[0101] Please see Figure 2According to another embodiment shown, the fluidized bed biofilm reaction system 100 of the present invention includes a tank 10, a first tube 20, two second tubes 30, a first flow guiding device 40, a second flow guiding device 50, and a return pipe 60. The tank 10 can be used to place a biosupport BC.

[0102] Figure 1 and Figure 2 The embodiments are mainly for illustration. In the fluidized bed biofilm reaction systems 100A and 100 provided by the present invention, the number of second tubes 30 is not limited and can be set according to actual needs, and is not limited to... Figure 1 A second tube body 30 or Figure 2 The two second pipe bodies 30 can be configured with three or more as needed. The following is a brief description... Figure 2 The illustrated embodiment is provided as an example to explain the detailed structure and function of the present invention, and is also applicable to other embodiments of the invention. Figure 1 Implementation example structure.

[0103] Please see Figures 2 to 4 As shown, the fluidized bed biofilm reaction system 100 provided by the present invention is applicable to fluid treatment. In this embodiment, it is used to purify wastewater. It includes a tank 10, a first pipe 20, two second pipes 30, a first flow guiding device 40, a second flow guiding device 50, and a return pipe 60.

[0104] The tank body 10 consists of a cylindrical tank body 11, a tank bottom 12 located at the bottom of the tank body 11, and a tank top 13 located at the top of the tank body 11. The tank body 11 is provided with a water outlet 14 and an air outlet 15.

[0105] The number and configuration of the water outlet 14 and the air outlet 15 are not limited to those shown in the diagram and can be designed according to actual needs. Figure 4 As shown, the distance D14 between the bottom edge of the water outlet 14 and the bottom of the tank 12 is 85% to 95% of the total height HT of the tank body 10.

[0106] The tank 10 contains a space for accommodating the biosupport BC. When fluid is injected into the tank 10, the biosupport BC floats naturally. In this embodiment, the fluid system is wastewater to be purified. The biosupport BC can be any support, such as PU foam or non-woven fabric. The biosupport BC can support microorganisms, such as ammonia oxidizing bacteria and nitrite oxidizing bacteria, to effectively increase the concentration of microorganisms.

[0107] Please see Figures 2 to 4 As shown, the first tube 20 has a plurality of first holes 21 that radially penetrate the first tube 20. The diameter of the first hole 21 is smaller than the outer diameter of the biological support BC.

[0108] Axial C of the first tube body 20 20A first hole 21 is located inside the tank 10, parallel to the horizontal plane H. The axial end of the first pipe 20 inside the tank 10 is a closed end 22. The first pipe 20 is used to introduce wastewater DW from the outside of the tank 10 into the tank 10, and the wastewater DW can fill the tank 10 up to the outlet hole 14.

[0109] like Figure 4 As shown, the axial direction C of the first tube 20 20 The distance D11 from the bottom of the tank 12 is 2% to 10% of the total height HT of the tank body 10.

[0110] The center of each first hole 21 is equal to or lower than the axial C of the first tube 20. 20 Horizontal position H 20 .

[0111] Please see Figures 2 to 4 As shown, this embodiment has two second tubes 30 with the same structure. Only the structure of the upper second tube 30 is described.

[0112] The second tube 30 has a plurality of second holes 31 that radially penetrate the second tube 30. The diameter of the second holes 31 is smaller than the outer diameter of the biological support BC.

[0113] Axial C of the second tube 30 30 A second hole 31 is located inside the groove 10, parallel to the horizontal plane H. The axial end of the second tube 30 inside the groove 10 is a closed end 32. The second tube 30 is positioned above the first tube 20 at a distance D1.

[0114] The center of each second hole 31 is equal to or lower than the axial C of the second tube 30. 30 Horizontal position H 30 .

[0115] In this embodiment, the first pipe 20 and the second pipe 30 are closed at one end 22 and 32 inside the tank 10. Therefore, the fluid (wastewater DW) inside the first pipe 20 and the second pipe 30 will only flow out of the first pipe 20 and the second pipe 30 through the first hole 21 and the second hole 31.

[0116] In this embodiment, the axial C of each second tube 30 30 Axial C of the first tube 20 20 The projection positions of the two second tubes 30 are parallel and overlap with the projection positions of the first tube 20.

[0117] Please see Figure 4 As shown, this embodiment includes two second tubes 30 arranged in a parallel array, with their horizontal height designed to be closer to the first tube 20. Figure 4The axial C of the second tube 30 (located below) 30 The distance D12 from the bottom of the tank 12 is 20% to 40% of the total height HT of the tank body 10. This distance is further from the first pipe body 20. Figure 4 The axial C of the second tube 30 (located above) 30 The distance D13 from the bottom of the tank 12 is 60% to 80% of the total height HT of the tank body 10.

[0118] For details regarding the arrangement and function of the first hole 21 in the first tube 20 and the second hole 31 in the second tube 30, please refer to [link to relevant documentation]. Figure 5 , 5A As shown in Figures 6 and 6A, the first tube 20 is used as an example, and the same applies to the second tube 30.

[0119] Please see Figure 5 As shown, it is Figure 3 A schematic diagram of the AA cross-sectional structure of the first tube 20. The center of each first hole 21 is centered on the axial direction C of the first tube 20. 20 Within a first included angle θ1 and a second included angle θ2, which extend radially to both sides of the center and downward in a fan shape respectively. Figure 5 The diagram shows that both the first included angle θ1 and the second included angle θ2 are 90 degrees, therefore... Figure 5 The first hole 21 is shown to be distributed along the axial direction C of the first tube 20. 20 The lower half of.

[0120] Please see Figure 5A As shown, when the wastewater DW in the first pipe body 20 flows out of the first pipe body 20 through the first hole 21, it can generate a horizontal water curtain disturbance, which can prevent the biological support BC from floating and can make the biological support BC and wastewater DW mix evenly.

[0121] Please see Figure 6 As shown, this embodiment is similar to Figure 5 The difference is that both the first included angle θ1 and the second included angle θ2 are 45 degrees.

[0122] Please see Figure 6A As shown, similarly, when the wastewater DW in the first pipe body 20 flows out of the first pipe body 20 through the first hole 21, it can generate a horizontal water curtain disturbance, which can prevent the biological support BC from floating and can make the biological support BC and wastewater DW mix evenly.

[0123] comprehensive Figure 5 and Figure 6In both embodiments, different angles can be paired, such as the first included angle θ1 being 90 degrees and the second included angle θ2 being 45 degrees, or vice versa. Therefore, it can be concluded that the first included angle θ1 and the second included angle θ2 can be any angle within the range of 0 degrees to 90 degrees, and the first included angle θ1 and the second included angle θ2 can be the same or different.

[0124] also, Figure 3 The first hole 21 is shown to be along the axial direction C of the first tube 20. 20 The arrangement, but not limited to this, is such that the center of the first hole 21 is equal to or lower than the axial C of the first tube 20. 20 Horizontal position H 20 Similarly, the center of the second hole 31 is equal to or lower than the axial C of the second tube 30. 30 Horizontal position H 30 .

[0125] Please see Figures 2 to 4 , Figure 7A As shown, the first flow guiding device 40 is disposed in the tank 10, and includes a first partition 41, a first longitudinal plate 42, a first conduit 43 and a first baffle 44.

[0126] The first partition 41 is flat and its bottom surface 411 faces away from the first tube 20. Figure 4 The second tube 30 is located above the middle tube 30 and is disposed above the second tube 30 at a distance D2. The first partition 41 is provided with at least one first guide hole 412 and a plurality of first separation holes 413 that penetrate the first partition 41 vertically.

[0127] The diameter of the first separation pore 413 is smaller than the outer diameter of the biological support BC. The distribution of the first separation pore 413 is not limited to the array shown in the figure, and can be randomly scattered.

[0128] The first longitudinal plate 42 is flat and is disposed on the top surface 414 of the first partition plate 41. The first longitudinal plate 42 has a first surface 421 and a second surface 422 facing the inner sidewall 16 of the tank body 11 respectively.

[0129] Please see Figure 7A As shown, the first guide hole 412 and the first separation hole 413 are located on the side of the first longitudinal plate 42 having the first surface 421. The distance D3 between the first guide hole 412 and the first longitudinal plate 42 is greater than the distance D4 between the first separation hole 413 and the first longitudinal plate 42. That is, the first separation hole 413 is disposed between the first guide hole 412 and the first longitudinal plate 42.

[0130] Please see Figures 2 to 4As shown, the first conduit 43 has multiple third holes 431 that radially penetrate the first conduit 43. The diameter of the third holes 431 is smaller than the outer diameter of the biological support BC.

[0131] Axial C of the first catheter 43 43 A first guide tube 43 is disposed perpendicular to the horizontal plane H on the bottom surface 411 of the first partition 41. The top end 432 of the first guide tube 43 is connected to the first guide hole 412, and the bottom surface 433 of the first guide tube 43 is closed.

[0132] The first baffle 44 is flat and plate-shaped. Its top surface 441 faces the first conduit 43 and is disposed below the first conduit 43 at a distance D5 from the bottom surface 433 of the first conduit 43. The bottom surface 442 of the first baffle 44 is further away from the first tube body 20. Figure 4 The second tube 30 is positioned above the middle tube 30 with a distance D6 between them.

[0133] Please see Figures 2 to 4 , Figure 7B As shown, the second flow guiding device 50 is disposed inside the tank 10 and above the first flow guiding device 40, and includes a second partition 51, a second longitudinal plate 52, a second conduit 53 and a second baffle 54.

[0134] The second partition 51 is flat and has its bottom surface 511 facing the top surface 414 of the first partition 41, and is positioned above the first partition 41 at a distance D7. A distance D8 exists between the bottom surface 511 of the second partition 51 and the top surface 423 of the first longitudinal plate 42. The second partition 51 has at least one second guide hole 512 extending vertically through it and multiple second separation holes 513.

[0135] The diameter of the second separation pore 513 is smaller than the outer diameter of the biological support BC. The distribution of the second separation pore 513 is not limited to the array shown in the figure, and can be randomly scattered.

[0136] The second longitudinal plate 52 is flat and is disposed on the top surface 514 of the second partition plate 51. It has a third surface 521 and a fourth surface 522 facing the inner sidewall 16 of the tank body 11 respectively, and the third surface 521 faces the water outlet 14.

[0137] The second longitudinal plate 52 has a through portion 523 that penetrates the third surface 521 and the fourth surface 522. The bottom edge of the through portion 523 is at the same horizontal position HWO as the bottom edge of the water outlet 14. The top 524 of the second longitudinal plate 52 is connected to the top of the tank 13.

[0138] Please see Figure 7BAs shown, the second guide hole 512 is located on the side of the second longitudinal plate 52 with the third surface 521, and the second separation hole 513 is located on the side of the second longitudinal plate 52 with the fourth surface 522. The projection position of the second guide hole 512 falls on the first guide hole 412.

[0139] Please see Figure 3 As shown, the second partition 51, the third surface 521, the top of the tank 13, and the tank body 11 form a water outlet space S. WO And the water outlet space S WO It is connected to the water outlet 14. The second partition 51, the fourth surface 522, the top of the tank 13, and the tank body 11 form an air outlet space S. GO .

[0140] Please see Figures 2 to 4 As shown, the second conduit 53 has multiple fourth holes 531 that radially penetrate the second conduit 53. The diameter of the fourth holes 531 is smaller than the outer diameter of the biological support BC.

[0141] Axial C of the second catheter 53 53 A second guide tube 53 is disposed perpendicular to the horizontal plane H on the bottom surface 511 of the second partition 51. The top end 532 of the second guide tube 53 is connected to the second guide hole 512, and the bottom surface 533 of the second guide tube 53 is closed.

[0142] The second baffle 54 is flat and plate-shaped. Its top surface 541 faces the second conduit 53 and is disposed below the second conduit 53 at a distance D9 from the bottom surface 533 of the second conduit 53. The bottom surface 542 of the second baffle 54 is at a distance D10 from the top surface 414 of the first partition 41. The projected position of the second baffle 51 overlaps with the projected position of the first baffle 41.

[0143] Please see Figure 7A and Figure 7B As shown, in addition to being located between the first guide hole 412 and the first longitudinal plate 42, the first separation hole 413 is also located within the range between the projection position of the second longitudinal plate 52 onto the first partition 41 and the first longitudinal plate 42. In this embodiment, the second longitudinal plate 52 is located at the center of the second partition 51; therefore, the first separation hole 413 is located at the center of the first partition 41.

[0144] Please see Figure 8A and Figure 8B As shown, in this other embodiment, the first partition 41 is provided with five first guide holes 412, each first guide hole 412 being provided with a first conduit 43, and the second partition 51 is provided with five second guide holes 512, each second guide hole 512 being provided with a second conduit 53. The shapes of the first baffle 44 and the second baffle 54 change with the number and distribution range of the first conduit 43 and the second conduit 53.

[0145] Figure 8A and Figure 8B As illustrated in the embodiments, the number of the first catheter 43 and the second catheter 53 is not limited, and can be... Figure 7A and 7B One or Figure 8A and 8B The number of catheters shown is multiple, designed according to actual needs, and the number of first catheters 43 and second catheters 53 can be the same or different.

[0146] Please see Figures 2 to 4 As shown, the return pipe 60 is disposed outside the tank body 10, and connects the side of the first longitudinal plate 42 with the first surface 421 to the tank body 11, and the first pipe body 20 to the second pipe body 30, respectively, to connect the space S formed between the side of the first longitudinal plate 42 with the second surface 422 and the tank body 11. 40 The fluid inside, such as wastewater, is returned to the first pipe body 20 and the second pipe body 30.

[0147] The return pipe 60 functions as a flow divider valve. The diameter and return flow rate of the return pipe 60 are designed according to actual needs, thus dividing space S... 40 When the fluid inside, such as wastewater, is introduced into the first pipe 20 and the second pipe 30, it can form... Figures 5 to 6A The horizontal water curtain turbulence shown is used to prevent the biological carrier BC from floating to the surface and to ensure thorough and uniform mixing.

[0148] Typically, a motor, pump, or other device (not shown in the figure) can be installed at the upper end of the return pipe 60 to facilitate the transfer of wastewater from space S. 40 Pull it out and send it to the first tube body 20 and the second tube body 30 .

[0149] Please see Figure 9 The diagram illustrates the working principle of the present invention. The fluidized bed biofilm reaction system of the present invention is suitable for fluid treatment; in this embodiment, the fluid system is wastewater to be purified.

[0150] Wastewater DW is fed into tank 10 through the first pipe 20, while the return pipe 60 is used to drain the space S. 40 Wastewater DW is fed into the first pipe 20 and the second pipe 30. Since the axial ends of the first pipe 20 and the second pipe 30 located in the tank 10 are closed ends 22 and 32, the wastewater DW flows out through the first hole 21 and the second hole 31, which causes the first pipe 20 and the second pipe 30 to generate a water curtain disturbance effect on the biological support BC, so that the biological support BC can stay in the space below the first pipe 20 and the second pipe 30, preventing the biological support BC from floating. Therefore, the biological support BC and the wastewater DW can react fully.

[0151] Then, the wastewater DW passes through the first diversion device 40 and the second diversion device 50 in sequence for solid / liquid / gas three-phase separation. Even if a very small amount of biosupport BC may float to the area where the first diversion device 40 is set, it can be blocked by the first baffle 41 to prevent it from continuing to float.

[0152] Finally, the treated wastewater DW1 will be discharged from the outlet 14 on one side of the tank 10, while the gas G generated during treatment will be discharged from the vent 15 at the top of the tank 10. The wastewater DW can fill the tank 10 up to the outlet 14.

[0153] In summary, the fluidized bed biofilm reactor system provided by this invention is suitable for fluid treatment. In one embodiment, the fluid system is wastewater to be purified. The fluidized bed biofilm reactor system provided by this invention includes a tank, a first pipe, a second pipe, a first flow guiding device, a second flow guiding device, and a return pipe. The first and second pipes form a reaction zone within the tank, and the first and second flow guiding devices form a solid / liquid / gas three-phase separation zone within the tank. The multi-layered transverse water curtain agitation reaction formed by the first and second pipes ensures uniform mixing of pollutants in the fluid within the reaction zone, accelerates gas removal from the biosupport, increases the opportunity for microorganisms to attach to the biosupport, and guides the gaseous phase emission of the reaction, thus facilitating fluid treatment in an anaerobic biological process.

[0154] This invention improves the problems of biomass flotation and short-circuiting in the reaction tank by using a non-blade agitation method, thereby enhancing the efficiency of the fluidized bed biofilm reaction system for anaerobic biological treatment. It can not only reduce the aeration requirements of traditional bioreactors and the energy consumption and cost of adding additional carbon sources, but also solve the problem of insufficient land area in high-tech plants and petrochemical plants.

[0155] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A fluidized bed biofilm reaction system, suitable for fluid processing, characterized in that, Include: A tank body is composed of a cylindrical tank body, a tank bottom located at the bottom of the tank body, and a tank top located at the top of the tank body. The interior forms a space for accommodating the biological support. The tank body is provided with a water outlet and a vent. A first tube has a plurality of first holes that radially penetrate the first tube. The axial direction of the first tube is parallel to the horizontal plane and penetrates the tank. The plurality of first holes are located in the tank and are used to introduce the fluid from the outside of the tank into the tank. The horizontal position of the center of each first hole is equal to or lower than the horizontal position of the axial direction of the first tube. The axial end of the first tube located in the tank is a closed end. At least one second tube has a plurality of second holes that radially penetrate the second tube. The axial direction of the second tube is parallel to the horizontal plane and penetrates the groove. The plurality of second holes are located in the groove. The second tube is disposed above the first tube at a distance from the first tube. The horizontal position of the center of each second hole is equal to or lower than the horizontal position of the second axis of the second tube. The axial end of each second tube in the groove is a closed end. A first flow guiding device is disposed within the tank, comprising: A first partition plate, which is flat and has its bottom surface facing the second tube body and is disposed above the second tube body at a distance from the second tube body. The first partition plate is provided with at least one first guide hole and a plurality of first separation holes that penetrate the first partition plate vertically. A first longitudinal plate, which is flat, is disposed on the top surface of the first partition. It has a first surface and a second surface facing the inner wall of the groove body respectively. The first guide hole and the plurality of first separation holes are located on the side of the first longitudinal plate with the first surface. The distance between the first guide hole and the first longitudinal plate is greater than the distance between the plurality of first separation holes and the first longitudinal plate. At least one first conduit has a plurality of third holes that radially penetrate the first conduit. The first conduit is disposed at the bottom of the first partition with its axis perpendicular to the horizontal plane. The top end of the first conduit is connected to the first guide hole, and the bottom end of the first conduit is closed. A first baffle, which is flat and has its top surface facing the first conduit and is disposed below the first conduit at a distance from the bottom end of the first conduit. The bottom of the first baffle is disposed above the second conduit at a distance from the second conduit. A second flow guiding device, disposed within the tank and located above the first flow guiding device, includes: A second partition plate, which is flat, is disposed above the first partition plate with its bottom surface facing the top surface of the first partition plate and at a distance from the first partition plate. There is a distance between the bottom surface of the second partition plate and the top surface of the first longitudinal plate. The second partition plate is provided with at least one second guide hole and a plurality of second separation holes that penetrate the second partition plate vertically. A second longitudinal plate, in the shape of a flat plate, is disposed on the top surface of the second partition. It has a third side and a fourth side facing the inner wall of the tank body, and the third side faces the water outlet. The second longitudinal plate has a through portion that passes through the third side and the fourth side. The second guide hole is located on the side of the second longitudinal plate with the third side. The plurality of second separation holes are located on the side of the second longitudinal plate with the fourth side. The projection position of the second guide hole falls on the first guide hole. The top of the second longitudinal plate is connected to the top of the tank. The second partition, the third side, the top of the tank and the tank body constitute a water outlet space, and the water outlet space is connected to the water outlet. The second partition, the fourth side, the top of the tank and the tank body constitute an air outlet space. At least one second conduit has a plurality of fourth holes that radially penetrate the second conduit. The second conduit is disposed at the bottom of the second partition with its axis perpendicular to the horizontal plane. The top end of the second conduit is connected to the second guide hole, and the bottom end of the second conduit is closed. A second baffle, which is flat and has its top surface facing the second conduit and is disposed below the second conduit at a distance from the bottom end of the second conduit. There is a distance between the bottom of the second baffle and the top surface of the first partition. A return pipe is disposed outside the tank body and connects the side of the first longitudinal plate having the first surface with the tank body, and the first pipe body with the second pipe body, respectively, to return the fluid in the space formed by the side of the first longitudinal plate having the first surface with the tank body and the tank body to the first pipe body and the second pipe body.

2. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The axial direction of the second tube is parallel to the axial direction of the first tube, and the projected position of the second tube overlaps with the projected position of the first tube.

3. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The centers of the plurality of first holes extend horizontally to both sides of the first tube body in a radial direction and extend downward in a fan shape within a first included angle and a second included angle.

4. The fluidized bed biofilm reaction system as described in claim 3, characterized in that, The first included angle and the second included angle are within the range of 0 degrees to 90 degrees.

5. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The diameter of each of the first hole, the second hole, the third hole, the fourth hole, the first separation hole, and the second separation hole is smaller than the outer diameter of the biological support.

6. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The positions of the plurality of first separation holes are located within the range between the projection position of the second longitudinal plate onto the first partition and the first longitudinal plate.

7. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The bottom edge of the through portion of the second longitudinal plate and the bottom edge of the water outlet are located on the same horizontal plane.

8. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The first partition is provided with a plurality of first guide holes, and each of the first guide holes is provided with a first conduit.

9. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, The second partition is provided with a plurality of second guide holes, and each of the second guide holes is provided with a second conduit.

10. The fluidized bed biofilm reaction system as described in claim 1, characterized in that, It includes a plurality of second tubes, the axial direction of the plurality of second tubes being parallel to the axial direction of the first tube, and the projected position of the plurality of second tubes overlapping the projected position of the first tube.

11. The fluidized bed biofilm reaction system as described in claim 10, characterized in that, The axial distance between the first tube and the bottom of the trench is 2% to 10% of the total height of the trench.

12. The fluidized bed biofilm reaction system as described in claim 10, characterized in that, The axial distance between the second tube and the bottom of the trench is 20% to 40% of the total height of the trench.

13. The fluidized bed biofilm reaction system as described in claim 10, characterized in that, The axial distance between the second tube and the bottom of the trench is 60% to 80% of the total height of the trench.

14. The fluidized bed biofilm reaction system as described in claim 10, characterized in that, The distance between the bottom edge of the water outlet and the bottom of the tank is 85% to 95% of the total height of the tank.

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