BBR integrated sewage treatment system

Abstract

The invention relates to a BBR integrated sewage treatment system, comprising a BBR treatment tank, an aeration treatment unit, a secondary sedimentation tank unit, an intermediate water tank and an equipment area connected in sequence, wherein the BBR treatment tank comprises a stirring zone and a biochemical zone, and water quality is regulated and sewage is biochemically treated in the same tank body; the aeration treatment unit comprises a plurality of aeration tanks connected in series; the secondary sedimentation tank unit comprises a plurality of secondary sedimentation tanks connected in parallel, and the intermediate water tank is arranged on the side of the secondary sedimentation tank unit; the secondary sedimentation tank comprises a central diversion barrel, a scum trough, a water outlet weir and a water collecting barrel from inside to outside, and water treated in the secondary sedimentation tank overflows to the intermediate water tank through the water collecting barrel, and the central diversion barrel is used for inletting water into the secondary sedimentation tank.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a BBR integrated sewage treatment system. Background Art

[0002] Wastewater treatment has become a major industry related to people's lives and industrial production. After more than a hundred years of development, domestic and foreign sewage treatment technologies have become relatively mature and are now gradually developing in the direction of large-scale and intensive development. At the same time, with the gradual improvement of sewage discharge standards, many domestic sewage treatment plants have been upgraded, most of which have added treatment process links on the original basis, breaking the reasonable layout of the original facilities. The increase in treatment links has also added a burden to the original power supply and service system, and has also increased the difficulty of management to a certain extent.

[0003] Therefore, in order to adapt to the large-scale and high-standard requirements of modern sewage treatment, it is urgent to solve the problems of large footprint, high investment and transportation costs, difficult equipment maintenance and repair, and poor aesthetics caused by the split / distributed structure design of sewage treatment plants. Summary of the invention

[0004] In view of the above problems, the present invention provides a BBR integrated sewage treatment system, comprising a BBR treatment tank, an aeration treatment unit, a secondary sedimentation tank unit, an intermediate water tank and an equipment area connected in sequence, wherein the BBR treatment tank comprises a stirring zone and a biochemical zone, and the water quality is adjusted and the sewage is biochemically treated in the same tank body; the aeration treatment unit comprises a plurality of aeration tanks connected in series;

[0005] The secondary sedimentation tank unit includes several secondary sedimentation tanks connected in parallel, and the middle water tank is arranged on the side of the secondary sedimentation tank unit; the secondary sedimentation tank includes a central diversion barrel, a scum trough, a water outlet weir and a water collecting barrel from the inside to the outside, and the water treated in the secondary sedimentation tank overflows to the middle water tank through the water collecting barrel, and the central diversion barrel is used to fill water into the secondary sedimentation tank.

[0006] Optionally, the BBR treatment tank is divided into a stirring zone and a biochemical zone in sequence along the water flow direction, and the stirring zone is close to the water inlet side of the BBR treatment tank; a submersible mixer is provided at the bottom of the stirring zone to fully stir the sewage in the stirring zone to achieve the purpose of homogenization regulation;

[0007] The top of the biochemical zone is provided with a BBR device, the BBR device includes a plurality of biological carriers attached with bacillus; the lower part of the biochemical zone is provided with a first aeration component;

[0008] The side wall at the top of the biochemical zone is provided with a first flow hole, so that the sewage treated in the biochemical zone overflows into the aeration tank.

[0009] Optionally, the aeration treatment unit includes a plurality of aeration tanks connected in series, wherein a plurality of liftable second aeration components and aerobic microorganisms are provided in the aeration tanks; and a second flow hole is provided on the top of the side wall between adjacent aeration tanks for transmitting sewage.

[0010] Further optionally, the second aeration assembly includes a plurality of second aeration plates distributed in an array, second air delivery pipes connected between the second aeration plates, and a retractable air delivery main pipe, and the second aeration plates and the second air delivery pipes are evenly arranged at the bottom of the aeration tank;

[0011] The gas transmission main pipe is an inverted L-shape, the bottom end of the vertical part of which is connected to the second gas transmission pipe, and the top end is located at the top of the aeration tank and connected to the horizontal part, on which a graduated ball valve is provided;

[0012] The horizontal part of the gas main is connected to the fan in the equipment area.

[0013] Optionally, a plurality of secondary settling tanks of the secondary settling tank unit are arranged on the downstream side of the aeration treatment unit along the water flow direction of the aeration treatment unit;

[0014] A vertical central diversion barrel is provided in the center of the secondary sedimentation tank, the top of the central diversion barrel is at the top of the secondary sedimentation tank, the bottom is at the bottom of the secondary sedimentation tank, and a water inlet of the secondary sedimentation tank is provided in the middle of the central diversion barrel, and the water inlet of the secondary sedimentation tank is connected to the last aeration tank through a pipeline;

[0015] The scum trough is surrounded by the outside of the central guide barrel, and the side wall of the scum trough is a first scum plate, on which a plurality of first filter holes are evenly arranged for intercepting the scum after solid-liquid separation; the outlet weir is arranged on the periphery of the upper part of the scum trough, and the top of the outlet weir is lower than the top of the scum trough; the bottom of the secondary sedimentation tank is conical.

[0016] Further optionally, a water distribution baffle is provided at the bottom opening of the central diversion barrel, and the water distribution baffle is umbrella-shaped. After the water treated in the last aeration tank enters the central diversion barrel, it flows from the bottom opening of the central diversion barrel to the water distribution baffle, and then enters the secondary sedimentation tank after being dispersed by the water distribution baffle, so that the water inflow is more uniform;

[0017] The last aeration tank is connected in parallel to the secondary sedimentation tank water inlet in the middle of the central diversion barrel of each secondary sedimentation tank through a pipeline.

[0018] Further optionally, the scum groove is in the shape of a barrel with openings at the top and bottom, and the bottom of the scum groove is lower than the bottom of the water collecting bucket;

[0019] A driving rotation device is provided above the scum trough, and the driving rotation device is connected to the scum trough and is used for controlling the rotation of the scum trough.

[0020] Further optionally, a plurality of second scum plates parallel to each other are provided between the scum trough and the water distribution baffle, the second scum plates are umbrella-shaped and symmetrically arranged on the periphery of the central guide barrel, the centers of all the second scum plates are on the same vertical line, and the areas of all the second scum plates are the same;

[0021] Each second scum plate is divided into two parts along its own radial direction. The part close to the central guide barrel is the inner circle part, and the part close to the side wall of the secondary sedimentation tank is the outer circle part. A number of second filter holes are evenly arranged on the inner circle part, and a number of third filter holes are evenly arranged on the outer circle part. The aperture of the second filter hole is larger than the aperture of the third filter hole.

[0022] Further optionally, in the aeration tank, since the second aeration plates are arranged in an array, the second air pipes are connected between the second aeration plates in a horizontal and vertical cross pattern, and the second air pipes parallel to the arrangement direction of the plurality of aeration tanks are defined as horizontal second air pipes, and the second air pipes perpendicular to the horizontal second air pipes are defined as vertical second air pipes;

[0023] A rotatable baffle is provided on the side of several second transverse gas pipes, and the baffle includes a motor, a rotating shaft and a baffle body. The motor is fixed at one end of the second transverse gas pipe, the rotating shaft is parallel to the second transverse gas pipe and close to the second transverse gas pipe, and the baffle body is connected to the rotating shaft.

[0024] Optionally, the length direction of the intermediate water tank is the arrangement direction of several secondary sedimentation tanks, the top of the intermediate water tank is lower than the top of the water collecting bucket, and the bottom of the intermediate water tank is higher than the bottom of the secondary sedimentation tank; a pump area is provided below the intermediate water tank, and a sludge return pump and an internal return pump are provided in the pump area.

[0025] Further optionally, the bottom of the secondary sedimentation tank is connected to the inlet of a sludge return pump, and the outlet of the sludge return pump is connected to the stirring zone of the BBR treatment tank through a pipeline to achieve external sludge return.

[0026] Further optionally, the bottom of the last aeration tank is connected to the inlet of an internal reflux pump, and the outlet of the internal reflux pump is connected to the stirring zone of the BBR treatment tank through a pipeline, so that the sludge in the aeration tank is returned to the biochemical zone to achieve internal sludge reflux.

[0027] Optionally, the equipment area is arranged on the side of the secondary sedimentation tank unit and the intermediate water tank along the arrangement direction of the plurality of secondary sedimentation tanks, and the equipment area is provided with a sand filter tank and its water pump, a nutrient solution dosing device, a fan and a control cabinet.

[0028] Further optionally, the sand filter tank and its water pump refer to the sand filter tank, the sand filter water inlet pump and the backwash water pump, and the inlet of the sand filter tank is connected in parallel with the sand filter water inlet pump and the backwash water pump through the solenoid valve group.

[0029] Further optionally, the nutrient solution dosing device includes a nutrient solution dosing box and two nutrient solution dosing pumps, and the nutrient solution dosing pumps are connected to the stirring zone of the BBR treatment tank through pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a top view of the BBR integrated sewage treatment system (I);

[0031] Figure 2 It is the top view of the BBR integrated sewage treatment system (II);

[0032] Figure 3 It is the side view of the BBR integrated sewage treatment system (I);

[0033] Figure 4 is a schematic diagram of the structure of the second aeration component;

[0034] Figure 5 It is the side view of the secondary sedimentation tank and the intermediate water tank;

[0035] Figure 6 is a schematic diagram of the structure of the second slag plate;

[0036] Figure 7 This is the side view of the BBR integrated sewage treatment system (II).

[0037] In the attached figure, 1-BBR treatment tank, 2-mixing zone, 3-biochemical zone, 4-submersible mixer, 5-BBR device, 6-first aeration assembly, 7-aeration tank, 8-second aeration assembly, 9-second aeration plate, 10-second air pipe, 11-air main pipe, 12-second sedimentation tank, 13-central diversion barrel, 14-water inlet of the second sedimentation tank, 15-scum trough, 16-first scum plate, 17-outlet weir, 18-water collection bucket, 19-water distribution baffle, 20-second horizontal air pipe, 21-second vertical air pipe, 22-motor, 23-rotating shaft, 24-baffle body, 25-intermediate water tank, 26-pump area, 27-sludge return pump, 28-inner Reflux pump, 29-equipment area, 30-second scum plate, 31-sand filter tank, 32-fan, 33-control cabinet, 34-sand filter inlet pump, 35-backwash water pump, 36-nutrient solution dosing box, 37-nutrient solution dosing pump, 38-flocculant dosing box, 39-flocculant dosing pump, 40-first inspection door, 41-personnel access door, 42-second inspection door, 43-liquid level gauge, 44-first aeration plate, 45-first air pipe, 46-solenoid valve, 47-first agitator, 48-second agitator, 49-first shutter, 50-second shutter, 51-lighting, 52-ladder, 53-inner circle, 54-outer circle. DETAILED DESCRIPTION

[0038] This embodiment provides a BBR integrated sewage treatment system, such as Figure 1-Figure 7 As shown, it includes a BBR treatment tank 1, an aeration treatment unit, a secondary sedimentation tank unit, an intermediate water tank 25 and an equipment area 29 connected in sequence, wherein the BBR treatment tank 1 includes a stirring area 2 and a biochemical area 3, which adjust the water quality and perform biochemical treatment on the sewage in the same tank body; the aeration treatment unit includes a plurality of aeration tanks 7 connected in series;

[0039] The secondary sedimentation tank unit includes several secondary sedimentation tanks 12 connected in parallel, and the intermediate water tank 25 is arranged on the side of the secondary sedimentation tank unit; the secondary sedimentation tank 12 includes a central diversion barrel 13, a scum trough 15, a water outlet weir 17 and a water collecting barrel 18 from the inside to the outside. The water treated in the secondary sedimentation tank 12 overflows to the intermediate water tank 25 through the water collecting barrel 18, and the central diversion barrel 13 is used to intake water into the secondary sedimentation tank 12.

[0040] Optionally, the BBR treatment tank 1 is divided into a stirring zone 2 and a biochemical zone 3 in sequence along the water flow direction, and the stirring zone 2 is close to the water inlet side of the BBR treatment tank 1; a submersible mixer 4 is provided at the lower part of the stirring zone 2 to fully stir the sewage in the stirring zone 2 to achieve the purpose of homogenization regulation;

[0041] A BBR device 5 is provided on the top of the biochemical zone 3. The BBR device 5 includes a plurality of biological carriers attached with bacillus, and 40-50% of the volume of each biological carrier is submerged below the sewage liquid surface; a first aeration component 6 is provided at the bottom of the biochemical zone 3 to provide oxygen for the biological carriers submerged in the sewage and the activated sludge below the BBR device 5;

[0042] A first flow hole is provided on the side wall of the top of the biochemical zone 3, and the first flow hole is provided on the opposite side of the water inlet of the BBR treatment tank 1. The first flow hole connects the biochemical zone 3 and the aeration tank 7 closest to the BBR treatment tank 1, so that the sewage treated in the biochemical zone 3 overflows to the aeration tank 7.

[0043] Optionally, the BBR device 5 can use an existing BBR device 5 on the market, such as patent number 2021219913445, named as a plug-in installed three-dimensional biological turntable sewage treatment device.

[0044] The BBR treatment tank 1 integrates a mixing and regulating tank and a BBR biochemical tank. A submerged mixer 4 is arranged on the water inlet side to mix the mixed liquid returned from the aeration treatment unit and the sludge returned from the secondary sedimentation tank unit with the raw water and sewage, and evenly adjust the water inlet of the biochemical zone 3. There is no partition device between the stirring zone 2 and the biochemical zone 3, and the two zones are connected. The water in the stirring zone 2 can freely enter the biochemical zone 3, which not only simplifies the equipment and civil engineering, but also makes the water in the biochemical zone 3 disturbed by the water in the stirring zone 2, and then maintains the disturbance of the water in the biochemical zone 3 and the limited oxygen content under the action of the first aeration component 6, so as to promote contact with the biological carrier. On the BBR device 5, the spore-shaped bacillus is adsorbed on the biological carrier, rapidly proliferates using the nutrients in the raw water, and detaches from the surface of the biological carrier and is supplemented into the activated sludge below the BBR device 5. During the rapid proliferation process, the bacillus simultaneously decomposes and removes organic matter, ammonia nitrogen, total nitrogen and phosphate in the sewage. Bacillus can quickly adsorb and degrade malodorous substances such as ammonia, hydrogen sulfide and mercaptans, and has high deodorization ability, effectively avoiding secondary pollution problems caused by odor emission.

[0045] Further optionally, an equipment trough is provided on the top of the biochemical zone 3 for centrally placing the motor 22 electrical equipment of the BBR device 5, and the bottom plate of the equipment trough is immersed 5-20 cm below the liquid surface of the biochemical zone 3, so that the equipment trough is a sinking trough body, and a drainage pipe is provided at the bottom of the equipment trough for discharging rainwater deposited in the equipment trough.

[0046] Further optionally, the first aeration assembly 6 includes a plurality of first aeration plates 44 and a first air pipe 45 connecting the first aeration plates, the first aeration plates 44 are located at the bottom of the biochemical area 3 , and the first air pipe 45 is connected to the fan 32 of the equipment area 29 .

[0047] At the initial stage of commissioning of the BBR treatment tank 1, the submersible mixer 4 and the first aeration assembly 6 are turned on to complete the bacteriostasis process, that is, the Bacillus composite strain is directly added to the BBR device 5 and the BBR treatment tank 1 and the sludge is inoculated, which effectively avoids the setting of temporary facilities for bacteriostasis and improves the working operation and the surrounding environment.

[0048] Optionally, the aeration treatment unit includes a plurality of aeration tanks 7 connected in series, wherein a plurality of liftable second aeration components 8 and aerobic microorganisms are provided in the aeration tanks 7; a second flow hole is provided on the top of the side wall between adjacent aeration tanks 7 for transmitting sewage; two adjacent second flow holes are located at the two ends of the diagonal of the same aeration tank 7 to prevent short-circuiting in the aeration tank 7, so that the sewage flows through the diagonal direction of the aeration tank 7 and is fully in contact with the microorganisms, thereby improving the treatment effect.

[0049] Further optionally, the second aeration assembly 8 includes a plurality of second aeration plates 9 distributed in an array, a second air delivery pipe 10 connected between the second aeration plates 9, and a retractable air delivery main pipe 11, and the second aeration plates 9 and the second air delivery pipe 10 are evenly arranged at the bottom of the aeration tank 7;

[0050] The gas supply main pipe 11 is inverted L-shaped, the bottom end of the vertical part of which is connected to the second gas supply pipe 10, and the top end is located at the top of the aeration tank 7 and connected to the horizontal part. A graduated ball valve is provided on the horizontal part to facilitate flexible and accurate adjustment of the air intake according to the dissolved oxygen demand at different positions of each aeration tank 7;

[0051] The horizontal portion of the gas supply main pipe 11 is connected to the fan 32 of the equipment area 29 .

[0052] Optionally, the vertical part of the gas transmission main pipe 11 is a sleeve structure, and the length of the vertical part is adjusted by the expansion and contraction of the sleeve. A sleeve is provided on the upper part of the vertical part to prevent the vertical part from further shortening and play a limiting role. The control of the sleeve can be carried out in an existing manner, for example, a driving device is provided above the aeration tank 7, the driving device controls a pulling component, and the pulling component is connected to the outer wall of the vertical part to pull the sleeve to expand and contract. There is no excessive sealing requirement for the connection of each section of the sleeve, and a small amount of air leakage at the gap can be used as part of the aeration, and does not affect the aeration of the second aeration plate 9 below.

[0053] The aeration tank 7 of the present invention is provided with a liftable second aeration component 8, which is not only convenient for maintaining the second aeration component 8, but also capable of adjusting the aeration height position, providing limited air supply for microorganisms at various heights, or increasing disturbance for sewage at various heights, thereby improving the sewage treatment effect.

[0054] Optionally, the plurality of secondary settling tanks 12 of the secondary settling tank unit are arranged on the downstream side of the aeration treatment unit along the water flow direction of the aeration treatment unit;

[0055] A vertical central guide barrel 13 is provided in the center of the secondary sedimentation tank 12, the top of the central guide barrel 13 is at the top of the secondary sedimentation tank 12, and the bottom is at the bottom of the secondary sedimentation tank 12. A secondary sedimentation tank water inlet 14 is provided in the middle of the central guide barrel 13, and the secondary sedimentation tank water inlet 14 is connected to the last aeration tank 7 through a pipeline;

[0056] The scum trough 15 is surrounded by the outside of the central guide barrel 13, and the side wall of the scum trough 15 is a first scum plate 16, on which a plurality of first filter holes are evenly arranged for intercepting scum after solid-liquid separation; the outlet weir 17 is arranged on the periphery of the upper part of the scum trough 15, and the top of the outlet weir 17 is lower than the top of the scum trough 15; the bottom of the secondary sedimentation tank 12 is conical, which is convenient for collecting solid impurities; the water treated in the secondary sedimentation tank 12 overflows from the top of the water collecting barrel 18 to the intermediate water tank 25.

[0057] Further optionally, a water distribution baffle 19 is provided at the bottom opening of the central guide barrel 13, and the water distribution baffle 19 is umbrella-shaped. After the water treated by the last aeration tank 7 enters the central guide barrel 13, it flows from the bottom opening of the central guide barrel 13 to the water distribution baffle 19, and then enters the secondary sedimentation tank 12 after being dispersed by the water distribution baffle 19, so that the water inflow is more uniform;

[0058] The last aeration tank 7 is connected in parallel to the secondary sedimentation tank water inlet 14 in the middle of the central diversion barrel 13 of each secondary sedimentation tank 12 through a pipeline.

[0059] Since the central guide barrel 13 is relatively slender compared to the secondary settling tank 12, and there is a water distribution baffle 19 at the bottom to intercept the water distribution, water may accumulate in the central guide barrel 13, resulting in a high water level. Therefore, the top of the central guide barrel 13 is designed to be at the top of the secondary settling tank 12 to accommodate the incoming water as much as possible, so that the last aeration tank 7 can smoothly flow into the secondary settling tank 12. In addition, the top of the central guide barrel 13 is open, and water can be output for flushing the central guide barrel 13 or flushing the secondary settling tank 12.

[0060] Further optionally, the scum trough 15 is a barrel shape with openings at the top and bottom, the bottom of the scum trough 15 is lower than the bottom of the water collecting bucket 18, and the top of the scum trough 15 is higher than the top of the water outlet weir 17;

[0061] A driving rotation device is provided above the scum trough 15 , and the driving rotation device is connected to the scum trough 15 and is used to control the rotation of the scum trough 15 .

[0062] Further optionally, a plurality of second scum plates 30 parallel to each other are provided between the scum groove 15 and the water distribution baffle 19, the second scum plates 30 are umbrella-shaped and symmetrically arranged on the periphery of the central guide barrel 13, that is, the centers of all the second scum plates 30 are on the same vertical line, and the areas of all the second scum plates 30 are the same;

[0063] Each second scum plate 30 is divided into two parts along its own radial direction. The part close to the central guide barrel 13 is the inner circle part 53, and the part close to the side wall of the second sedimentation tank is the outer circle part 54. A plurality of second filter holes are evenly arranged on the inner circle part 53, and a plurality of third filter holes are evenly arranged on the outer circle part 54. The aperture of the second filter hole is larger than the aperture of the third filter hole.

[0064] Further optionally, the ratio of the area of ​​the second scum plate 30 to the cross-sectional area of ​​the second sedimentation tank is (0.85-0.95):1.

[0065] Further optionally, in the upper and lower adjacent second scum plates 30, the diameter of the inner circle portion of the second scum plate located above is smaller than the diameter of the inner circle portion of the second scum plate located below, that is, the area of ​​the inner circle portion of the second scum plate 30 gradually decreases and the area of ​​the outer circle portion gradually increases from bottom to top.

[0066] Optionally, the outlet weir 17 is arranged on the periphery of the scum trough 15, and the space between the outlet weir 17 and the side wall of the secondary sedimentation tank is a water collecting bucket 18, that is, the inner wall of the water collecting bucket 18 is the outlet weir 17, and the outer wall is the side wall of the secondary sedimentation tank. The water collecting bucket 18 is arranged on the top of the secondary sedimentation tank, and the height of the water collecting bucket 18 is less than the height of the scum trough 15, that is, the bottom surface of the water collecting bucket 18 is higher than the bottom end of the scum trough 15.

[0067] The water entering from the central guide barrel 13 is dispersed by the water distribution baffle 19, enters the secondary sedimentation tank, and flows upward. The sludge in the water settles to the conical bottom of the secondary sedimentation tank under the action of gravity sedimentation; the sewage is intercepted by the second scum plate 30 during the rising process. Since the third filter holes of the outer ring part 54 are small, more sludge is intercepted by the outer ring part 54 of each second scum plate 30. Since the second filter holes of the inner ring part 53 are large, part of the sewage carries the smaller sludge through the inner ring part 53, and the larger sludge can still be intercepted. In this way, the pressure and flow rate of the rising sewage can be balanced, and the interception of several second scum plates 30 can be prevented. The interception effect causes the interception resistance in the secondary sedimentation tank to be too large, preventing the water from flowing smoothly; the sludge with smaller size is gathered under the sludge groove 15 through the inner circle parts 53 of the plurality of second sludge plates 30 and enters the sludge groove 15 with the water flow, and at the same time, it is filtered by the outer circle parts 54 of the plurality of second sludge plates 30, and the clearer water rises to the periphery of the sludge groove 15, and then is discharged into the water collecting bucket 18 through the outlet weir 17; when the sludge groove 15 rotates, under the action of centrifugal force, the flocculent sludge in the water body in the sludge groove 15 is intercepted by the first sludge plate 16, and after the water is filtered by the first sludge plate 16, it overflows from the outlet weir 17 to the water collecting bucket 18.

[0068] Optionally, an online dissolved oxygen detector, a pH detector, and an MLSS sludge concentration meter are installed in the BBR treatment tank 1 and the aeration tank 7 to facilitate real-time monitoring of water quality data and further ensure that the effluent meets the standards. The MLSS sludge concentration meter can move up and down in the aeration tank 7 to monitor the sludge concentration at different heights in the aeration tank 7.

[0069] Further optionally, in the aeration tank 7, since the second aeration plates 9 are arranged in an array, the second air pipes 10 are connected between the second aeration plates 9 in a horizontal and vertical cross shape, and the second air pipes 10 parallel to the arrangement direction of the plurality of aeration tanks 7 are defined as horizontal second air pipes 20, and the second air pipes perpendicular to the horizontal second air pipes 20 are defined as vertical second air pipes 21;

[0070] A rotatable baffle is provided on the side of several horizontal second gas pipelines 20. The baffle includes a motor 22, a rotating shaft 23, and a baffle body 24. The motor 22 is fixed at one end of the horizontal second gas pipeline 20. The rotating shaft 23 is parallel to the horizontal second gas pipeline 20 and closely adheres to the horizontal second gas pipeline 20. The baffle body 24 is connected to the rotating shaft 23.

[0071] As a specific implementation manner, the second gas pipeline 10 is composed of three horizontal second gas pipelines 20 and one vertical second gas pipeline 21 to form a "king" shape. The main gas pipeline 11 is connected to the center of the "king" shape. The left side of the first horizontal second gas pipeline 20 faces the adjacent second aeration component 8, and the right side is connected to the vertical second gas pipeline 21. Both sides of the second horizontal second gas pipeline 20 are connected to the vertical second gas pipeline 21. The left side of the third horizontal second gas pipeline 20 is connected to the vertical second gas pipeline 21, and the right side faces another adjacent second aeration component 8, which can be understood as rotating the second gas pipeline of the "king" shape by 90°. A baffle is provided on the left side of the first horizontal second gas pipeline 20, and two symmetrical baffles are provided on the right side. A space is left between the two symmetrical baffles for the connection position of the first horizontal second gas pipeline 20 and the vertical second gas pipeline 21. Two motors 22 are fixed at one end of the first horizontal second gas pipeline 20, and one motor 22 is fixed at the other end. Two symmetrical baffles are provided on both sides of the second horizontal second gas pipeline 20 to leave a space for the connection position of the second horizontal second gas pipeline 20 and the vertical second gas pipeline 21. Two motors 22 are respectively fixed at both ends of the second horizontal second gas pipeline 20. A baffle is provided on the right side of the third horizontal second gas pipeline 20, and two symmetrical baffles are provided on the left side. A space is left between the two symmetrical baffles for the connection position of the third horizontal second gas pipeline 20 and the vertical second gas pipeline 21. Two motors 22 are fixed at one end of the third horizontal second gas pipeline 20, and one motor 22 is fixed at the other end.

[0072] When the baffle body of each baffle is in a horizontal position, it can cover most of the cross-sectional area of the aeration tank 7, ensuring that the baffle body does not touch the adjacent second gas pipeline 10. When the biochemical reaction in the aeration tank 7 proceeds normally, each baffle body can maintain a vertical state or a rotating / swinging state, which can stir the water body around the second aeration component 8, promote the full contact between the water body and microorganisms, and improve the treatment effect. When the baffle body is vertical, it can be upward or downward, preferably upward.

[0073] When there is too much sludge in the effluent of the aeration tank 7, each baffle body is horizontal, basically covering the cross-section of the aeration tank 7, and retaining most of the biochemical sludge in the aeration tank 7 under the baffle body, which can immediately improve the effluent of the aeration tank 7; or making some baffle bodies horizontal and covering part of the cross-section of the aeration tank 7 can also improve the effluent quality. More preferably, the height of the baffle cooperates with that of the second scum board 30 to control the inflow / outflow of the second and subsequent aeration tanks 7 and the secondary sedimentation tank 12, and improve the sludge-water separation effect.

[0074] The BBR integrated sewage treatment system described in the present invention adopts multiple filtration and overflow forms in mud and water separation, that is, a combination of filtration of several second scum plates 30, first scum plates 16 and sand filter tanks 31, that is, the outlet weir 17, the water collecting bucket 18, and the intermediate water pool 25 overflow in sequence, which improves the mud and water separation effect and helps to ensure that the effluent water quality meets the discharge standards.

[0075] Optionally, the length direction of the intermediate water tank 25 is the arrangement direction of several secondary sedimentation tanks 12, and the bottom of the intermediate water tank 25 is higher than the bottom of the secondary sedimentation tank; a pump area 26 is provided below the intermediate water tank 25, and a sludge return pump 27 and an internal return pump 28 are provided in the pump area 26.

[0076] Further optionally, the bottom of the secondary sedimentation tank 12 is connected to the inlet of the sludge return pump 27, and the outlet of the sludge return pump 27 is connected to the stirring zone 2 of the BBR treatment tank 1 through a pipeline to realize the external sludge return; the outlet of the sludge return pump 27 is also connected to the regulating tank at the front end of the sewage treatment system through a parallel pipeline and an electric valve 46 to discharge the remaining sludge into the regulating tank.

[0077] Further optionally, the bottom of the last aeration tank 7 is connected to the inlet of the internal reflux pump 28, and the outlet of the internal reflux pump 28 is connected to the stirring zone 2 of the BBR treatment tank 1 through a pipeline, so that the sludge in the aeration tank 7 is returned to the biochemical zone 3 to achieve internal sludge recirculation.

[0078] Optionally, the equipment area 29 is arranged on the side of the secondary sedimentation tank unit and the intermediate water tank 25 along the arrangement direction of the plurality of secondary sedimentation tanks 12, and the equipment area 29 is provided with a sand filter tank 31 and its water pump, a nutrient solution dosing device, a fan 32 and a control cabinet 33.

[0079] After the water in the intermediate water tank 25 is left to stand, the water in the intermediate water tank 25 can be input into the sand filter tank 31 for further treatment through the sand filter water inlet pump 34, that is, the filter material (such as quartz sand) of the sand filter tank 31 filters out the suspended matter in the sewage, and the filtered clean water meets the standards and is discharged from the sewage treatment system.

[0080] Further optionally, the sand filter tank 31 and its water pump refer to the sand filter tank 31, the sand filter water inlet pump 34 and the backwash water pump 35. The inlet of the sand filter tank 31 is connected in parallel with the sand filter water inlet pump 34 and the backwash water pump 35 through the electromagnetic valve group, that is, the water outlets of the sand filter water inlet pump 34 and the backwash water pump 35 are respectively provided with an electromagnetic valve; the sand filter water inlet pump 34 and the backwash water pump 35 can be arranged on the side of the secondary sedimentation tank;

[0081] When the sand filter tank 31 needs to clean the filter media, the backwash water pump 35 is controlled by switching the solenoid valve group to backwash the sand filter tank 31, thereby improving the filtering effect and extending the filter media replacement cycle. The flushing water and waste residue flow by gravity to the outside of the sewage treatment system, for example, to the regulating tank.

[0082] Further optionally, the nutrient solution dosing device includes a nutrient solution dosing box 36 and two nutrient solution dosing pumps 37, and the nutrient solution dosing pumps 37 are connected to the stirring zone 2 of the BBR treatment tank 1 through pipelines; after the nutrient solution is diluted, stirred and evenly mixed in the nutrient solution dosing box 36, it is pumped to the stirring zone 2 by the nutrient solution dosing pumps 37 to promote the growth and reproduction of microorganisms in the biochemical zone 3. The two nutrient solution dosing pumps 37 are used in a backup mode and in alternating operation, which reduces the frequency of equipment failures and maintenance.

[0083] Further optionally, a flocculant dosing device is provided below the nutrient solution dosing device, and the flocculant dosing device is an optional facility, and is selected when the phosphorus removal requirement for produced water discharge is high;

[0084] The flocculant dosing device includes a flocculant dosing box 38 and two flocculant dosing pumps 39. The flocculant dosing pumps 39 are connected to the first secondary sedimentation tank 12 (i.e., the secondary sedimentation tank 12 on the most upstream side) through pipelines. After the flocculant is diluted, stirred, and mixed evenly in the flocculant dosing box 38, it is transported to the secondary sedimentation tank 12 by the flocculant dosing pumps 39. The flocculant dosing pumps 39 are used in a standby mode and run alternately. The nutrient solution dosing device and the flocculant dosing device are respectively provided with a first agitator and a second agitator, and the dilution water can be tap water or the water discharged from the sand filter tank 31.

[0085] Further optionally, the blower 32 is a Roots blower 32, two of which are installed, one for backup and one for use, arranged up and down, and the compressed air delivered by the blower 32 is delivered to the BBR treatment tank 1 and the aeration treatment unit through a pipeline.

[0086] Optionally, a first inspection door 40 is provided on one side of the equipment area 29 close to the sand filter tank 31 and the fan 32. The first inspection door 40 is a double-opening sliding door, and a first louver 49 is installed on the first inspection door 40 for heat dissipation of the equipment;

[0087] A personnel entrance door 41 is provided on the side of the equipment area 29 perpendicular to the side where the inspection door is located. The control cabinet 33, the nutrient solution dosing device and the flocculant dosing device are arranged close to the personnel entrance door 41; a ventilation fan is provided next to the personnel entrance door 41 to facilitate more effective heat dissipation.

[0088] Optionally, the pump area 26 is provided with a second inspection door 42, which is a two-leaf push-pull type and is provided with a second shutter 50 to facilitate equipment maintenance and ventilation. The top of the BBR integrated sewage treatment system is provided with a lighting lamp 51, and a ladder 52 is provided on the side.

[0089] Optionally, the top of the sewage treatment system is paved with fiberglass grating plates and patterned steel plates. Grating plates are used on the tops of the parts of the BBR treatment tank 1, aeration treatment unit, and secondary sedimentation tank unit that require equipment maintenance, and patterned steel plates are used on the other parts. This facilitates equipment maintenance and reduces costs.

[0090] The appearance of the sewage treatment system adopts a double-layer design of pool wall steel plates and decorative panels. For the northern high-altitude cold regions, insulation cotton is added in the space between the pool wall steel plates and the decorative panels to achieve equipment insulation. Adding an insulation blanket on the top of the sewage treatment system can make the insulation effect better.

[0091] The aeration treatment unit is provided with a ladder and two lighting lamps for easy maintenance of the equipment. The top of the BBR treatment tank 1 is provided with four lifting holes for easy lifting of the BBR device 5.

[0092] The sewage treatment system is provided with flowmeters on the water inlet and outlet pipes of each tank, tank and water tank. The ultrasonic flowmeter is used in the present invention, which is easy to install and solves the problem of inaccurate measurement of ordinary flowmeters due to small flow. Liquid level meters 43 are installed in the BBR treatment tank 1 and the intermediate water tank 25.

[0093] Optionally, an Internet of Things gateway is provided in the control cabinet 33, which communicates and controls the submersible mixer 4, the BBR device 5, the first aeration component 6, the second aeration component 8 and the drive device for controlling the gas transmission main pipe 11, the central diversion barrel 13, the second scum plate 30, the sludge return pump 27, the internal return pump 28, the fan 32, the sand filter water inlet pump 34, the backwash water pump 35, the solenoid valve group, the nutrient solution dosing pump 37, the nutrient solution dosing box 36, the flocculant dosing box 38, the flocculant dosing pump 39, the flow meters and valves of each water pipeline, the dissolved oxygen detector, the pH detector, the MLSS sludge concentration meter, the lighting and other necessary components in the sewage treatment system. Those skilled in the art can know the installation location and usage of these necessary components; the control cabinet 33 can push the data of each device or instrument to the cloud server through the MQTT protocol for remote display, so as to realize unattended equipment, remote control of equipment and intelligent operation and maintenance.

[0094] The control cabinet 33 is arranged on the side of the sand filter water inlet pump 34 and the backwash water pump 35, and the nutrient solution dosing device, the flocculant dosing device and the fan 32 are arranged on the side of the sand filter tank 31. The BBR integrated sewage treatment system of the present invention has a small footprint, a compact structure, a reasonable and beautiful equipment layout, simple equipment maintenance, a high degree of equipment automation, can realize unattended and intelligent operation and maintenance, and can operate at low temperature.

Claims

1. BBR integrated sewage treatment system, characterized by: It includes a BBR treatment tank, an aeration treatment unit, a secondary sedimentation tank unit, an intermediate water tank and an equipment area connected in sequence. The BBR treatment tank includes a stirring area and a biochemical area, which adjust the water quality and perform biochemical treatment on sewage in the same tank body; the aeration treatment unit includes a plurality of aeration tanks connected in series; The secondary sedimentation tank unit includes a plurality of secondary sedimentation tanks connected in parallel, and the intermediate water tank is arranged on the side of the secondary sedimentation tank unit; the secondary sedimentation tank includes a central diversion bucket, a scum tank, a water outlet weir and a water collection bucket from the inside to the outside, and the water treated in the secondary sedimentation tank overflows to the intermediate water tank through the water collection bucket, and the central diversion bucket is used to feed water into the secondary sedimentation tank; The aeration tank is provided with a plurality of liftable second aeration components, the second aeration components comprising a plurality of second aeration plates distributed in an array, second air delivery pipes connected between the second aeration plates, and a retractable air delivery main pipe, the second aeration plates and the second air delivery pipes are evenly arranged at the bottom of the aeration tank; The gas transmission main pipe is an inverted L-shape, the bottom end of its vertical part is connected to the second gas transmission pipe, the top end is at the top of the aeration tank and connected to the horizontal part, and a graduated ball valve is provided on the horizontal part; the horizontal part of the gas transmission main pipe is connected to the fan in the equipment area; In the aeration tank, the second air pipes are connected between the second aeration plates in a horizontal and vertical cross shape, the second air pipes parallel to the arrangement direction of the plurality of aeration tanks are defined as horizontal second air pipes, and the second air pipes perpendicular to the horizontal second air pipes are defined as vertical second air pipes; A rotatable baffle is provided on the side of several second transverse gas pipes, and the baffle includes a motor, a rotating shaft and a baffle body. The motor is fixed at one end of the second transverse gas pipe, the rotating shaft is parallel to the second transverse gas pipe and close to the second transverse gas pipe, and the baffle body is connected to the rotating shaft.

2. The sewage treatment system according to claim 1, characterized in that: The BBR treatment tank is divided into a stirring zone and a biochemical zone in sequence along the water flow direction. The stirring zone is close to the water inlet side of the BBR treatment tank. A submersible mixer is provided at the bottom of the stirring zone to fully stir the sewage in the stirring zone to achieve the purpose of homogenization regulation. The top of the biochemical zone is provided with a BBR device, the BBR device includes a plurality of biological carriers attached with bacillus; the lower part of the biochemical zone is provided with a first aeration component; The side wall at the top of the biochemical zone is provided with a first flow hole to allow the sewage treated in the biochemical zone to overflow into the aeration tank.

3. The sewage treatment system according to claim 1, characterized in that: Aerobic microorganisms are arranged in the aeration tank; and second flow holes are arranged on the tops of the side walls between adjacent aeration tanks for transmitting sewage.

4. The sewage treatment system according to claim 1, characterized in that: The plurality of secondary settling tanks of the secondary settling tank unit are arranged on the downstream side of the aeration treatment unit along the water flow direction of the aeration treatment unit; A vertical central diversion barrel is provided in the center of the secondary sedimentation tank, the top of the central diversion barrel is at the top of the secondary sedimentation tank, the bottom is at the bottom of the secondary sedimentation tank, and a water inlet of the secondary sedimentation tank is provided in the middle of the central diversion barrel, and the water inlet of the secondary sedimentation tank is connected to the last aeration tank through a pipeline; The scum trough is surrounded by the outside of the central guide barrel, and the side wall of the scum trough is a first scum plate, on which a plurality of first filter holes are evenly arranged for intercepting the scum after solid-liquid separation; the outlet weir is arranged on the periphery of the upper part of the scum trough, and the top of the outlet weir is lower than the top of the scum trough; the bottom of the secondary sedimentation tank is conical.

5. The sewage treatment system according to claim 4, characterized in that: The scum trough is in the shape of a barrel with openings at the top and bottom, and the bottom of the scum trough is lower than the bottom of the water collecting bucket; A driving rotation device is provided above the scum trough, and the driving rotation device is connected to the scum trough and is used for controlling the rotation of the scum trough.

6. The sewage treatment system according to claim 5, characterized in that: A water distribution baffle is provided at the bottom opening of the central diversion barrel. The water distribution baffle is umbrella-shaped. After the water treated in the last aeration tank enters the central diversion barrel, it flows from the bottom opening of the central diversion barrel to the water distribution baffle, and then enters the secondary sedimentation tank after being dispersed by the water distribution baffle, so that the water inflow is more uniform. The last aeration tank is connected in parallel to the secondary sedimentation tank water inlet in the middle of the central diversion barrel of each secondary sedimentation tank through a pipeline.

7. The sewage treatment system according to claim 6, characterized in that: A plurality of second scum plates parallel to each other are arranged between the scum trough and the water distribution baffle, the second scum plates are umbrella-shaped and symmetrically arranged on the periphery of the central guide barrel, the centers of all the second scum plates are on the same vertical line, and the areas of all the second scum plates are the same; Each second scum plate is divided into two parts along its own radial direction. The part close to the central guide barrel is the inner circle part, and the part close to the side wall of the secondary sedimentation tank is the outer circle part. A number of second filter holes are evenly arranged on the inner circle part, and a number of third filter holes are evenly arranged on the outer circle part. The aperture of the second filter hole is larger than the aperture of the third filter hole.

8. The sewage treatment system according to claim 4, characterized in that: The length direction of the middle water tank is the arrangement direction of the plurality of secondary sedimentation tanks, the top of the middle water tank is lower than the top of the water collecting bucket, and the bottom of the middle water tank is higher than the bottom of the secondary sedimentation tank; a pump area is provided below the middle water tank, and a sludge return pump and an internal return pump are provided in the pump area; The bottom of the secondary sedimentation tank is connected to the inlet of the sludge return pump, and the outlet of the sludge return pump is connected to the stirring zone of the BBR treatment tank through a pipeline to realize the external return of sludge; The bottom of the last aeration tank is connected to the inlet of the internal reflux pump, and the outlet of the internal reflux pump is connected to the stirring zone of the BBR treatment tank through a pipeline, so that the sludge in the aeration tank is returned to the biochemical zone to achieve internal sludge reflux.

Images