CN217921769U - Sewage biological treatment system - Google Patents
Sewage biological treatment system Download PDFInfo
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- CN217921769U CN217921769U CN202122914852.XU CN202122914852U CN217921769U CN 217921769 U CN217921769 U CN 217921769U CN 202122914852 U CN202122914852 U CN 202122914852U CN 217921769 U CN217921769 U CN 217921769U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model provides a sewage biological treatment system, including fan room, elementary sedimentation tank, mixed aeration case, biological treatment pond, secondary sedimentation tank and disinfection pond, the fan room is equipped with the first air supply house steward of connecting mixed aeration case and the second air supply house steward of connecting biological treatment pond, and the one end of biological treatment pond is equipped with the overflow weir, and the overflow weir is linked together with secondary sedimentation tank, and the one end of secondary sedimentation tank is equipped with the decanter that is used for carrying the clarified water toward the disinfection pond. The raw water filters most mud and suspended particles through primary sedimentation tank and then gets into and carries out aeration treatment in the mixed aeration incasement, the decomposition rate that pure oxygen and agitating unit that mixed aeration incasement carried can promote the microorganism, water behind the aeration treatment gets into and carries out secondary biological treatment in the biological reaction pond, utilize set up in the biological reaction pond that the biological rotating disc further carries out further purification treatment to the water, the water quality of handling is far greater than single aeration water quality, the purifying effect of water has obtained further promotion.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, in particular to biological sewage treatment system.
Background
With the rapid increase of urban population and the continuous development of industry and agriculture, the phenomena of water resource shortage and water body pollution become more and more serious, and higher requirements are put forward for the effluent standard of urban sewage treatment plants.
The existing sewage treatment system has a weak purification function, and the water quality cannot be effectively purified by simple aeration treatment, so a treatment system with stronger purification function is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, an object of the present invention is to provide a biological sewage treatment system, which is used to solve the problem of poor cleaning effect of the sewage treatment system.
In order to achieve the above object, the technical solution of the present invention is that:
the utility model provides a sewage biological treatment system, includes fan room and the elementary sedimentation tank, the mixed aeration case, biological treatment pond, secondary sedimentation tank and the disinfection pond that connect gradually, the fan room is equipped with the first air supply house steward that is used for connecting the mixed aeration case and is used for connecting the second air supply house steward of biological treatment pond, the one end of biological treatment pond is equipped with the overflow weir, the overflow weir is linked together with secondary sedimentation tank, the one end of secondary sedimentation tank is equipped with the hydrophone of decanting that is used for carrying the clarified water toward the disinfection pond.
As a preferred technical scheme, sewage biological treatment system still includes sludge dewaterer, sludge dewaterer's drainage end is through first recovery pipeline and elementary sedimentation tank intercommunication, the bottom of biological treatment pond and secondary sedimentation tank all is equipped with the sludge pump, and the sludge pump of two ponds has met first mud house steward, the bottom of elementary sedimentation tank is equipped with first mud backwash pump, the one end of mixing aeration box is equipped with second mud backwash pump, first mud backwash pump and second mud backwash pump have met second mud house steward, first mud house steward and second mud house steward tandem have the flow divider, the one end of flow divider links to each other with sludge dewaterer, the other end of flow divider is connected with hydrocyclone through the second recovery pipeline, hydrocyclone is equipped with two exports, and one of them exports through pipeline and elementary sedimentation tank intercommunication, and another export is through pipeline and mixing aeration box intercommunication.
As a preferred technical scheme, a first water inlet and a first water outlet are respectively arranged on two sides of the secondary sedimentation tank, a plurality of groups of inclined plates which are arranged at equal intervals are arranged in the secondary sedimentation tank, each inclined plate is divided into an upper section and a lower section which are connected with each other, an included angle between a plane of the upper section of each inclined plate and a horizontal plane is 45-90 degrees, an included angle between a plane of the lower section of each inclined plate and the horizontal plane is 45-60 degrees, the end surface of the upper section of each inclined plate is lower than a full-load horizontal plane in the secondary sedimentation tank, the bottom of the secondary sedimentation tank is a pyramid inclined bottom which is gathered and contracted towards the center, and the first sludge reflux pump is arranged at the center of the pyramid inclined bottom.
As a preferred technical scheme, a second water inlet and a second water outlet are respectively arranged on two sides of the mixing aeration tank, a sludge return port is further arranged on the side wall of the mixing aeration tank, the sludge return port is located below the second water inlet, the second sludge return pump is communicated with the sludge return port through a pipeline, a plurality of relatively independent treatment cavities are separated from a cavity of the mixing aeration tank by a plurality of groups of partition plates with openings below, stirring devices with the number equal to that of the treatment cavities are mounted at the top of the mixing aeration tank, the stirring devices are provided with hollow pipes, the lower ends of the hollow pipes extend to the corresponding treatment cavities, the upper ends of the hollow pipes extend to the outer sides of the stirring devices, rotary connectors are movably connected to the upper ends of the hollow pipes, each rotary connector is connected with a first air supply main pipe through a pipeline, and communicated aeration devices are fixedly mounted at the lower ends of the hollow pipes.
As a preferred technical scheme, a plurality of air outlets which correspond to the treatment chambers and are provided with electromagnetic valves are arranged at the top of the mixing aeration tank, an air inlet is arranged in the treatment chamber at the front end of the mixing aeration tank, the air inlet is connected with a pure oxygen supply device, a pressure sensor is arranged in each treatment chamber, each air outlet is connected with a tail gas treatment device in a junction mode through a pipeline, the electromagnetic valves at the air inlets at the tail ends of the mixing aeration tank are in a normally open state, and the electromagnetic valves at the other air inlets are triggered by the pressure sensors to open instructions.
As a preferable technical scheme, a third water inlet is formed in one side of the biological treatment tank, the other side of the biological treatment tank is communicated with the secondary sedimentation tank through an overflow weir, a plurality of groups of vertical plates with through holes below the tank space of the biological treatment tank are used for separating a plurality of relatively independent treatment cabins, a rotatably mounted biological rotating disc is arranged in each treatment cabin, the tank bottom of each treatment cabin and the tank bottom of the secondary sedimentation tank are both pyramid inclined bottoms which are gathered and contracted towards the center, and the sludge pump is arranged at the center of each pyramid inclined bottom.
As an optimal technical scheme, a water pump is arranged in the secondary sedimentation tank and connected with a water delivery main pipe, jet devices are fixedly arranged on vertical plates at two sides of the treatment chamber, the two jet devices in the treatment chamber are distributed diagonally, a plurality of groups of fins distributed circumferentially are arranged at the edge of the biological rotating disc, the jet devices are provided with air ports and water inlet ports, the air ports are in junction with the second air supply main pipe through pipelines, the water inlet ports are in junction with the water delivery main pipe through pipelines, and the spraying direction of the jet devices is tangent to the circumferential surface of the biological rotating disc.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
1. the raw water filters most mud and suspended particles through the elementary sedimentation tank that is covered with the swash plate and then gets into and carries out aeration treatment in the mixed aeration incasement, the decomposition rate that pure oxygen and agitating unit that mixed aeration incasement carried can promote the microorganism, water behind the aeration treatment gets into and carries out secondary biological treatment in the biological reaction pond, utilize set up biological rotating disc in the biological reaction pond carry out further purification treatment to the water, water quality through handling is far greater than single aeration water quality, the purifying effect of water has obtained further promotion.
2. Primary sedimentation tank, mixed aeration case, biological treatment pond and secondary sedimentation tank all are equipped with the pump machine that is used for handling bottom of the pool mud, and the mud of these accumulations is sent into the sludge dewaterer under the effect of pump machine and is carried out dehydration treatment, avoids keeping piling up of mud and causes negative effects to quality of water.
3. The biological rotating disc in the biological treatment tank abandons the traditional mechanical drive, and oxygen-containing torrent sprayed by the jet device is used for pushing the biological rotating disc to rotate, so that oxygen is mixed in the torrent, and the decomposition speed of aerobic bacteria on organic matters is favorably improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic flow diagram of a biological wastewater treatment system.
FIG. 2 is a schematic diagram of the structure of the primary sedimentation tank.
Fig. 3 is a schematic structural diagram of a hybrid aeration tank.
FIG. 4 is a schematic diagram of the structure of a biological treatment tank.
In the figure: 1. a primary sedimentation tank, 2, a hydrocyclone, 3, a fan room, 4, a first air supply main pipe, 5, a second air supply main pipe, 6, a mixed aeration box, 7, a water delivery main pipe, 8, a biological treatment tank, 9, a secondary sedimentation tank, 10, a disinfection tank, 11, a decanter, 12, an overflow weir, 13, a first sludge main pipe, 14, a second sludge main pipe, 15, a flow divider, 16, a sludge dewatering machine, 17, a first recovery pipeline, 18, a second recovery pipeline, 19, a first water inlet, 20, a first water outlet, 21, an inclined plate, 22 and a pyramid inclined bottom, 23, a first sludge reflux pump, 24, a second water inlet, 25, an air inlet, 26, a hollow pipe, 27, a stirring device, 28, a rotary connector, 29, an air outlet, 30, a second water outlet, 31, a stirring blade, 32, a treatment cavity, 33, an aeration device, 34, an opening, 35, a partition plate, 36, a sludge reflux port, 37, a second sludge reflux pump, 38, a third water inlet, 39, an ejector, 40, a vertical plate, 41, a biological rotating disc, 42, a treatment cabin, 43, a sludge pump, 44, a through hole, 45, a fin plate, 46, a water pump, 47 and a third water outlet.
Detailed Description
The features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples thereof.
The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
See fig. 1. The utility model provides a sewage biological treatment system, this system include fan room 3 and the elementary sedimentation tank 1 that connects gradually, mix aeration tank 6, biological treatment pond 8, secondary sedimentation tank 9, disinfection pond 10 and sludge dewaterer 16. The fan room 3 is provided with a first air supply main pipe 4 used for being connected with a mixing aeration box 6 and a second air supply main pipe 5 used for being connected with a biological treatment tank 8, one end of the biological treatment tank 8 is provided with an overflow weir 12, the overflow weir 12 is communicated with a secondary sedimentation tank 9, and one end of the secondary sedimentation tank 9 is provided with a decanter 11 used for conveying clear water to a disinfection tank 10. The bottom of the primary sedimentation tank 1 is provided with a first sludge return pump 23, one end of the mixing aeration box 6 is provided with a second sludge return pump 37, and the first sludge return pump 23 and the second sludge return pump 37 are connected with a second sludge main pipe 14 in a junction manner. The water filtering end of the sludge dewatering machine 16 is communicated with the primary sedimentation tank 1 through a first recovery pipeline 17, the bottoms of the biological treatment tank 8 and the secondary sedimentation tank 9 are both provided with sludge pumps 43, and the sludge pumps 43 of the two tanks are connected with a first sludge main pipe 13 in a junction mode. A flow dividing valve 15 is connected with the first sludge main pipe 13 and the second sludge main pipe 14 in a junction mode, one end of the flow dividing valve 15 is connected with a sludge dewatering machine 16, and the other end of the flow dividing valve 15 is connected with the hydrocyclone 2 through a second recovery pipeline 18. The hydrocyclone 2 is provided with two outlets, one of which is communicated with the primary sedimentation tank 1 through a pipeline, and the other of which is communicated with a mixing aeration tank 6 through a pipeline.
See fig. 2. Two sides of the secondary sedimentation tank 9 are respectively provided with a first water inlet 19 and a first water outlet 20, and a plurality of groups of inclined plates 21 which are arranged at equal intervals are arranged in the secondary sedimentation tank 9. The inclined plate 21 is divided into an upper section and a lower section which are connected, the included angle between the plane of the upper section of the inclined plate 21 and the horizontal plane is 45-90 degrees, the included angle between the plane of the lower section of the inclined plate 21 and the horizontal plane is 45-60 degrees, and the end surface of the upper section of the inclined plate 21 is lower than the full-load horizontal plane in the secondary sedimentation tank 9. The inclined plate 21 is divided into an upper section and a lower section which are connected with each other, so that negative pressure is formed in the water, and suspended particles in the water can flow back to the bottom of the secondary sedimentation tank 9. The bottom of the secondary sedimentation tank 9 is a pyramid inclined bottom 22 which is gathered and contracted towards the center, and a first sludge reflux pump 23 is arranged at the center of the pyramid inclined bottom 22.
See fig. 3. The two sides of the mixing aeration tank 6 are respectively provided with a second water inlet 24 and a second water outlet 30, the side wall of the mixing aeration tank 6 is also provided with a sludge return port 36, the sludge return port 36 is positioned below the second water inlet 24, and a second sludge return pump 37 is communicated with the sludge return port 26 through a pipeline. The chamber of the mixing aeration box 6 is divided into a plurality of relatively independent treatment cavities 32 by a plurality of groups of partition boards 35 with openings 34 at the lower part, the top of the mixing aeration box 6 is provided with a plurality of stirring devices 27 with the number equal to that of the treatment cavities 32, and the stirring devices 27 are provided with hollow pipes 26. The lower end of the hollow pipe 26 extends to the corresponding treatment cavity 32, the upper end of the hollow pipe 26 extends to the outer side of the stirring device 27, the upper end of the hollow pipe 26 is movably connected with rotary connectors 28, each rotary connector 28 is connected with the first air supply main pipe 4 in a junction mode through a pipeline, and the lower end of the hollow pipe 26 is fixedly provided with a communicated aeration device 33. Raw water is filtered most of sludge and suspended particles by the primary sedimentation tank 1 which is full of the inclined plate 21 and then enters the mixed aeration tank 6 for aeration treatment, and the stirring device 27 in the mixed aeration tank 6 can greatly improve the decomposition speed of microorganisms and improve the purification effect.
See fig. 3. The top of the mixing aeration box 6 is provided with a plurality of air outlets 29 which correspond to the treatment chambers 32 and are provided with electromagnetic valves, the treatment chamber 32 at the front end of the mixing aeration box 6 is provided with an air inlet 25, and the air inlet 25 is connected with a pure oxygen supply device in order to increase the aeration rate in the mixing aeration box 6. Pressure sensors are arranged in the processing cavities 32, the air outlets 29 are connected with a tail gas processing device in a junction mode through pipelines, electromagnetic valves of the air inlets 25 at the tail ends of the mixing aeration boxes 6 are in a normally open state, and the electromagnetic valves of other air inlets 25 are triggered by the pressure sensors to open instructions. Because microorganisms in water can generate a large amount of gas when decomposing organic matters, if the gas is continuously accumulated in the treatment cavity 32, the pressure in the mixing aeration tank 6 is increased, when the pressure reaches a threshold value, the pressure sensor triggers an opening instruction of an electromagnetic valve in the air inlet 25, and the gas is discharged to the atmosphere after harmful gas is treated by the tail gas treatment device, so that the pressure in the mixing aeration tank 6 is reduced, and the danger is avoided.
See fig. 4. A third water inlet 38 is arranged on one side of the biological treatment tank 8, the other side of the biological treatment tank 8 is communicated with the secondary sedimentation tank 9 through an overflow weir 12, the tank inner space of the biological treatment tank 8 is divided into a plurality of relatively independent treatment cabins 42 by a plurality of groups of vertical plates 40 with through holes 44 below, each treatment cabin 42 is internally provided with a rotatably mounted biological rotating disc 41, the tank bottom of the treatment cabin 42 and the tank bottom of the secondary sedimentation tank 9 are both pyramid inclined bottoms 22 which are gathered and contracted towards the center, and a sludge pump 43 is arranged at the center of each pyramid inclined bottom 22. In operation, the biological rotating disk 41 is immersed or partially immersed in the treatment chamber 42 filled with sewage, and the biological rotating disk 41 continuously rotates at a certain speed. The rotating biological disk 41 is alternately contacted with sewage and air, and after a period of rotation, a layer of biological film is attached to the disk of the rotating biological disk 41. When the sewage is transferred into the sewage again, the biological film adsorbs organic pollutants in the sewage, and absorbs dissolved oxygen in a water film outside the biological film to decompose organic matters, and microorganisms can propagate by themselves in the process. When the biological rotating disk 41 is rotated out of the reaction tank, the biological rotating disk contacts with air, and the air is continuously dissolved in the water film to increase the dissolved oxygen. In the process, besides the transfer of organic substances (BOD, COD) and O2, other substances such as CO2, NH3, etc. are transferred between the biofilm attached to the bio-disc 41 and the sewage and air, so as to form a continuous process of adsorption, oxidative decomposition and oxygen uptake, so that the sewage is continuously purified.
See fig. 4. The inside of the secondary sedimentation tank 9 is provided with a water pump 46, the water pump 46 is connected with a water delivery main pipe 7, the vertical plates 40 at two sides of the treatment chamber 42 are respectively provided with an ejector 39, the two ejectors 39 in the treatment chamber 42 are diagonally distributed, the edge of the biological rotating disk 41 is provided with a plurality of groups of fins 45 which are circumferentially distributed, the two ejectors 39 are provided with an air port and a water inlet port, the air port is connected with the second air supply main pipe 5 in a junction mode through a pipeline, the water inlet port is connected with the water delivery main pipe 7 in a junction mode through a pipeline, and the spraying direction of the ejectors 39 is tangent to the circumferential surface of the biological rotating disk 41. The biological rotating disk 41 in the biological treatment tank 8 abandons the traditional mechanical drive, and oxygen-containing torrent sprayed by the jet device 39 is used for pushing the biological rotating disk 41 to rotate, so that the torrent is mixed with oxygen, and the decomposition speed of aerobic bacteria on organic matters is favorably improved.
The sewage biological treatment system has the following working procedures:
raw water added with treatment agent enters the primary sedimentation tank 1 from the first water inlet 19, negative pressure is generated by the raw water under the action of the inclined plate 21, and suspended particles in the water are brought to the bottom of the tank and flow out from the first water outlet 20. The primarily filtered sewage enters the mixing aeration tank 6 from the second water inlet 24, the airflow generated by the fan room 3 is conveyed to the aeration device 33 arranged at the bottom of the tank through a pipeline and is dispersed and escaped as bubbles, and meanwhile, the stirring device 27 drives the stirring blade 31 and the aeration device 33 to improve the aeration rate. Mix aeration tank 6 and utilize the activated sludge in the pond to carry out sewage treatment, provide certain sewage dwell time in the pond, satisfy the mixed condition that oxygen volume and sewage that aerobic microorganism needed and activated sludge fully contacted, promote the organic matter in the sewage by the aerobic microorganism decomposition efficiency in the mud and impurity gas spill over efficiency, sewage after the aeration flows out through second delivery port 30. The sewage after aeration treatment enters the biological treatment tank 8 from the third water inlet 38, the biological rotating disc 41 in the biological treatment tank 8 is immersed or partially immersed in the treatment chamber 42 filled with the sewage, and the biological rotating disc 41 continuously rotates at a certain speed under the action of the ejector 39. The rotating biological disk 41 is alternately contacted with sewage and air, and after a period of rotation, a layer of biological film is attached to the disk of the rotating biological disk 41. When the sewage is transferred into the sewage again, the biological membrane adsorbs organic pollutants in the sewage, and absorbs dissolved oxygen in a water film outside the biological membrane to decompose the organic matters, and microorganisms can reproduce in the process. When the biological rotating disk 41 is rotated out of the reaction tank, the biological rotating disk contacts with air, and the air is continuously dissolved in the water film to increase the dissolved oxygen. In the process, besides the transfer of organic substances (BOD, COD) and O2, other substances such as CO2, NH3, etc. are transferred between the biofilm attached to the bio-disc 41 and the sewage and air, so as to form a continuous process of adsorption, oxidative decomposition and oxygen uptake, so that the sewage is continuously purified. The treated sewage finally flows into the secondary sedimentation tank 9 through the overflow weir 12 for sedimentation and clarification, the supernatant water is sent to the disinfection tank 10 for disinfection treatment under the action of the decanter 11, and the water body in the disinfection tank 10 is finally utilized or discharged.
In accordance with the above embodiments of the present invention, the embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and its various embodiments with various modifications as are suited to the particular use contemplated. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A sewage biological treatment system is characterized in that: including fan room (3) and the elementary sedimentation tank (1), mixed aeration case (6), biological treatment pond (8), secondary sedimentation tank (9) and disinfection pond (10) that connect gradually, fan room (3) are equipped with first air supply house steward (4) that are used for connecting mixed aeration case (6) and are used for connecting second air supply house steward (5) of biological treatment pond (8), the one end of biological treatment pond (8) is equipped with overflow weir (12), overflow weir (12) are linked together with secondary sedimentation tank (9), the one end of secondary sedimentation tank (9) is equipped with decanter (11) that are used for carrying the clarified water toward disinfection pond (10).
2. The biological wastewater treatment system according to claim 1, wherein: the sewage biological treatment system further comprises a sludge dewatering machine (16), the water filtering end of the sludge dewatering machine (16) is communicated with the primary sedimentation tank (1) through a first recovery pipeline (17), the bottoms of the biological treatment tank (8) and the secondary sedimentation tank (9) are respectively provided with a sludge pump (43), the sludge pumps (43) of the two tanks are connected with a first sludge main pipe (13), the bottom of the primary sedimentation tank (1) is provided with a first sludge return pump (23), one end of the mixing aeration tank (6) is provided with a second sludge return pump (37), the first sludge return pump (23) and the second sludge return pump (37) are connected with a second sludge main pipe (14), the first sludge main pipe (13) and the second sludge main pipe (14) are connected with a flow dividing valve (15), one end of the flow dividing valve (15) is connected with the sludge dewatering machine (16), the other end of the flow dividing valve (15) is connected with a hydraulic cyclone (2) through a second recovery pipeline (18), the hydraulic cyclone (2) is provided with two outlets, one of which is communicated with the primary sedimentation tank (1) through a second flow dividing pipe, and the mixing aeration tank (6) is communicated with another aeration tank.
3. The biological wastewater treatment system according to claim 2, wherein: the two sides of the secondary sedimentation tank (9) are respectively provided with a first water inlet (19) and a first water outlet (20), a plurality of groups of inclined plates (21) which are arranged at equal intervals are arranged inside the secondary sedimentation tank (9), the inclined plates (21) are divided into an upper section and a lower section which are connected with each other, the included angle between the plane of the upper section of each inclined plate (21) and the horizontal plane is 45-90 degrees, the included angle between the plane of the lower section of each inclined plate (21) and the horizontal plane is 45-60 degrees, the end surface of the upper section of each inclined plate (21) is lower than the full-load horizontal plane in the secondary sedimentation tank (9), the bottom of each secondary sedimentation tank (9) is a pyramid inclined bottom (22) which is gathered together and contracted towards the center, and the first sludge return pump (23) is arranged at the center of the pyramid inclined bottom (22).
4. The biological wastewater treatment system according to claim 2, wherein: the two sides of the mixing aeration box (6) are respectively provided with a second water inlet (24) and a second water outlet (30), the side wall of the mixing aeration box (6) is further provided with a sludge return port (36), the sludge return port (36) is positioned below the second water inlet (24), a second sludge return pump (37) is communicated with the sludge return port (36) through a pipeline, a plurality of relatively independent treatment cavities (32) are separated by a plurality of groups of partition plates (35) with openings (34) below the chamber of the mixing aeration box (6), the top of the mixing aeration box (6) is provided with stirring devices (27) with the same number as the treatment cavities (32), the stirring devices (27) are provided with hollow pipes (26), the lower ends of the hollow pipes (26) extend to the corresponding treatment cavities (32), the upper ends of the hollow pipes (26) extend to the outer sides of the stirring devices (27), the upper ends of the hollow pipes (26) are movably connected with rotary connectors (28), and the rotary connectors (28) are connected with a first air supply pipe (4) through pipelines, and the lower ends of the hollow pipes (26) are fixedly connected with the aeration devices (33).
5. The biological wastewater treatment system according to claim 4, wherein: the top of the mixing aeration box (6) is provided with a plurality of air outlets (29) which correspond to the treatment chambers (32) and are provided with electromagnetic valves, the treatment chamber (32) at the front end of the mixing aeration box (6) is provided with an air inlet (25), the air inlet (25) is connected with a pure oxygen supply device, the inside of each treatment chamber (32) is provided with a pressure sensor, each air outlet (29) is connected with a tail gas treatment device in a junction mode through a pipeline, the electromagnetic valves at the tail end of the mixing aeration box (6) are in a normally open state, and the electromagnetic valves at the air inlets (25) are triggered by the pressure sensors to open instructions.
6. The biological wastewater treatment system according to claim 2, wherein: one side of the biological treatment tank (8) is provided with a third water inlet (38), the other side of the biological treatment tank (8) is communicated with a secondary sedimentation tank (9) through an overflow weir (12), the tank inner space of the biological treatment tank (8) is divided into a plurality of relatively independent treatment cabins (42) by a plurality of groups of vertical plates (40) with through holes (44) below, a rotatably mounted biological rotating disc (41) is arranged in each treatment cabin (42), the tank bottom of each treatment cabin (42) and the tank bottom of the secondary sedimentation tank (9) are pyramid inclined bottoms (22) which are gathered together and contracted towards the center, and a sludge pump (43) is arranged at the center position of each pyramid inclined bottom (22).
7. The biological wastewater treatment system according to claim 6, wherein: the inside of secondary sedimentation tank (9) is equipped with water pump (46), water pump (46) are connected with delivery manifold (7), all be fixed with ejector (39) on riser (40) of processing cabin (42) both sides, two ejector (39) slant diagonal distribution in processing cabin (42), the edge of biological rotating disk (41) is provided with fin board (45) that a plurality of groups circumference distribute, two ejector (39) are equipped with air port and inlet port, the air port passes through pipeline and second air supply manifold (5) tandem, the inlet port passes through pipeline and delivery manifold (7) tandem, the direction of the injection of ejector (39) is tangent with the periphery of biological rotating disk (41).
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| CN202122914852.XU CN217921769U (en) | 2021-11-25 | 2021-11-25 | Sewage biological treatment system |
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| CN202122914852.XU CN217921769U (en) | 2021-11-25 | 2021-11-25 | Sewage biological treatment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161819A (en) * | 2023-02-28 | 2023-05-26 | 中国建筑第二工程局有限公司 | Purification equipment for improving decomposition efficiency of organic pollutants in sewage and application method |
| CN116177821A (en) * | 2023-04-18 | 2023-05-30 | 山东向明数智物联科技有限公司 | Seawater analysis processing system |
| CN117902788A (en) * | 2024-03-19 | 2024-04-19 | 山东金泽尔冷暖设备有限公司 | Sewage recycling device and sewage recycling method |
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2021
- 2021-11-25 CN CN202122914852.XU patent/CN217921769U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161819A (en) * | 2023-02-28 | 2023-05-26 | 中国建筑第二工程局有限公司 | Purification equipment for improving decomposition efficiency of organic pollutants in sewage and application method |
| CN116177821A (en) * | 2023-04-18 | 2023-05-30 | 山东向明数智物联科技有限公司 | Seawater analysis processing system |
| CN116177821B (en) * | 2023-04-18 | 2023-08-08 | 山东向明数智物联科技有限公司 | Seawater analysis processing system |
| CN117902788A (en) * | 2024-03-19 | 2024-04-19 | 山东金泽尔冷暖设备有限公司 | Sewage recycling device and sewage recycling method |
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