A tank-type complete sewage treatment plant

Abstract

This utility model relates to the field of wastewater treatment technology, and in particular to a tank-type complete wastewater treatment equipment, comprising: a treatment tank, the interior of which is divided into four fan-shaped areas along the circumference, and arranged sequentially along the wastewater flow direction as an anaerobic tank, an aerobic tank, an MBR membrane tank, and a clear water tank. The bottom of the anaerobic tank is equipped with a multi-layer annular water distribution structure to prevent short-circuiting and ensure that the sludge is fully suspended and evenly contacts the wastewater. The aerobic tank is equipped with a swirling disturbance mixing structure to drive efficient mixing of activated sludge and dissolved oxygen. The bottom of the MBR membrane tank is equipped with a pulse disturbance structure. Through the synergistic effect of multi-layer water distribution, swirling mixing, and pulse disturbance, the problems of poor adaptability to flow fluctuations, low mixing and mass transfer efficiency, and severe membrane fouling in existing technologies can be solved, achieving efficient and stable operation of the wastewater treatment system and energy saving. Simultaneously, it improves sludge mixing efficiency, oxygen utilization rate, and membrane antifouling performance.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a tank-type complete wastewater treatment equipment. Background Technology

[0002] Existing tank-type complete wastewater treatment equipment typically adopts a static zoning structure, which has the following drawbacks: (1) uneven water distribution in the anaerobic tank leads to local sludge deposition, reducing the organic matter degradation efficiency; (2) insufficient mixing intensity in the aerobic tank results in low oxygen mass transfer efficiency, affecting the nitrification reaction rate; (3) the MBR membrane tank relies on continuous aeration to maintain membrane surface cleanliness, resulting in high energy consumption and prominent membrane fouling problems. Therefore, there is an urgent need for an improved solution that enhances treatment stability through the synergistic effect of multi-layer water distribution, swirling mixing, and pulse disturbance. To this end, this utility model provides a tank-type complete wastewater treatment equipment. Utility Model Content

[0003] Therefore, it is necessary to provide a tank-type complete sewage treatment equipment to address the aforementioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A tank-type complete sewage treatment equipment includes a treatment tank and a controller. The interior of the treatment tank is divided into four fan-shaped areas along the circumference, and these areas are sequentially arranged as an anaerobic tank, an aerobic tank, an MBR membrane tank, and a clear water tank along the sewage flow direction. Each fan-shaped area is separated by a partition. Water passage holes are provided at the upper end of the partition between the anaerobic tank and the aerobic tank, and at the upper end of the partition between the aerobic tank and the MBR membrane tank. The bottom of the anaerobic tank is provided with a multi-layer annular water distribution structure to prevent short-circuiting and ensure that the sludge is fully suspended and evenly contacts the sewage. The aerobic tank is provided with a swirling disturbance mixing structure to drive the efficient mixing of activated sludge and dissolved oxygen. The bottom of the MBR membrane tank is provided with a pulse disturbance structure. A water level sensor is provided on the upper part of the inner wall of the anaerobic tank. The multi-layer annular water distribution structure, the swirling disturbance mixing structure, the pulse disturbance structure, and the water level sensor are electrically connected to the controller.

[0005] As a further embodiment of this utility model, the multi-layer annular water distribution structure includes an inner layer water distribution pipe, a middle layer water distribution pipe, and an outer layer water distribution pipe. The inner layer water distribution pipe, the middle layer water distribution pipe, and the outer layer water distribution pipe are distributed in a concentric ring structure extending outward at the bottom of the anaerobic tank. Water outlet holes are evenly distributed on the inner layer water distribution pipe, the middle layer water distribution pipe, and the diameter of the water outlet holes decreases sequentially from the inner layer water distribution pipe to the outer layer water distribution pipe.

[0006] As a further embodiment of this utility model, a first solenoid valve is provided on the inner layer water distribution pipe, the middle layer water distribution pipe and the outer layer water distribution pipe, and the first solenoid valve is electrically connected to the controller.

[0007] As a further embodiment of this utility model, the swirling turbulence mixing structure includes a support, a motor, a rotating shaft, and rotating blades. The support is fixedly installed on the top of the aerobic tank, the motor is fixedly installed on the support, one end of the rotating shaft is connected to the output end of the motor, and the other end is connected to the rotating blades. The rotating blades are arranged in the middle of the aerobic tank, and the tilt angle between the rotating blades and the horizontal plane is 30-45°.

[0008] As a further improvement of this invention, it also includes a frequency converter for controlling the rotational speed of the rotating blades.

[0009] As a further embodiment of this utility model, the pulse disturbance structure includes an inner pulse air pipe, a middle pulse air pipe, and an outer pulse air pipe. The inner, middle, and outer pulse air pipes are distributed in a concentric ring structure extending outwards at the bottom of the MBR membrane tank. An aeration hole is provided at a distance of 0.5-1 meter on each of the inner, middle, and outer pulse air pipes.

[0010] As a further embodiment of this utility model, it also includes an air compressor, the output end of which is connected to a pulse air pipe through an air delivery pipe. The inner pulse air pipe, the middle pulse air pipe and the outer pulse air pipe are all equipped with electromagnetic pulse valves, and the electromagnetic pulse valves are electrically connected to the controller.

[0011] As a further embodiment of this invention, it also includes an MBR membrane module disposed above the pulse disturbance structure.

[0012] As a further embodiment of this utility model, it also includes a suction pump, a pumping pipe, and a drain pipe. One end of the pumping pipe extends into the MBR membrane tank and is positioned below the MBR membrane module, while the other end is connected to the input end of the suction pump. One end of the drain pipe is connected to the output end of the suction pump, while the other end extends into the clear water tank.

[0013] As a further embodiment of this invention, it also includes a storage battery and a solar cell module, wherein the solar cell module and the controller are electrically connected to the controller.

[0014] The advantages and beneficial effects of this utility model are as follows: The tank-type complete sewage treatment equipment provided by this utility model can solve the problems of poor adaptability to flow fluctuations, low mixing mass transfer efficiency and serious membrane fouling in the prior art through the synergistic effect of multi-layer water distribution, swirling mixing and pulse disturbance. It can achieve efficient and stable operation of sewage treatment system and energy saving and consumption reduction. At the same time, it can improve sludge mixing efficiency, oxygen utilization rate and membrane antifouling performance. Attached Figure Description

[0015] Figure 1This is a structural schematic diagram of a tank-type complete sewage treatment equipment according to the present invention.

[0016] Figure 2 This is a top view of the bottom interior of the processing tank of this utility model.

[0017] Figure reference numerals: 1. Treatment tank; 2. Anaerobic tank; 3. Aerobic tank; 4. MBR membrane tank; 5. Clear water tank; 6. Controller; 7. Outlet pipe; 8. Second solenoid valve; 9. Battery; 10. Solar panel; 11. Water level sensor; 12. Frequency converter; 13. Motor; 14. Support; 15. Rotating shaft; 16. Water passage hole; 17. Suction pump; 18. Pumping pipe; 19. Drain pipe; 20. Air compressor; 21. Air supply pipe; 22. Inner layer water distribution pipe; 23. Middle layer water distribution pipe; 24. Outer layer water distribution pipe; 25. Outer layer pulse air pipe; 26. Middle layer pulse air pipe; 27. Outer layer pulse air pipe; 28. Aeration hole; 29. Detailed Implementation

[0018] The embodiments of this application will now be described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Furthermore, the following embodiments and features can be combined with each other unless otherwise specified. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] To address the problems of poor adaptability to flow fluctuations, low mixing and mass transfer efficiency, and severe membrane fouling in existing technologies, this application provides a tank-type complete wastewater treatment system integrating multi-layer annular water distribution, swirling turbulence mixing, and pulsed membrane fouling control. (See attached figure.) Figure 1-2The device includes a treatment tank 1 and a controller 6. The interior of the treatment tank 1 is divided into four fan-shaped areas along the circumference, which are arranged sequentially along the direction of wastewater flow as an anaerobic tank 2, an aerobic tank 3, an MBR membrane tank 4, and a clear water tank 5. Each fan-shaped area is separated by a partition. Water passage holes 16 are provided at the upper end of the partition between the anaerobic tank 2 and the aerobic tank 3, and at the upper end of the partition between the aerobic tank 3 and the MBR membrane tank 4. The bottom of the anaerobic tank 2 is provided with a multi-layer annular water distribution structure to avoid short-circuiting and ensure that the sludge is fully suspended and evenly contacts the wastewater. The aerobic tank 3 is provided with a swirling disturbance mixing structure to drive the activated sludge and dissolved oxygen to mix efficiently. The bottom of the MBR membrane tank 4 is provided with a pulse disturbance structure. A water level sensor 11 is provided on the upper part of the inner wall of the anaerobic tank 2. The multi-layer annular water distribution structure, the swirling disturbance mixing structure, the pulse disturbance structure, and the water level sensor 11 are electrically connected to the controller 6.

[0021] In this embodiment, the multi-layer annular water distribution structure includes an inner water distribution pipe 22, a middle water distribution pipe 23, and an outer water distribution pipe 24. The inner water distribution pipe 22, the middle water distribution pipe 23, and the outer water distribution pipe 24 are distributed in a concentric ring structure extending outward at the bottom of the anaerobic tank 2. Water outlet holes 25 are evenly distributed on the inner water distribution pipe 22, the middle water distribution pipe 23, and the outer water distribution pipe 24. The diameter of the water outlet holes 25 decreases sequentially from the inner water distribution pipe 22 to the outer water distribution pipe 24.

[0022] In this embodiment, the inner water distribution pipe 22, the middle water distribution pipe 23 and the outer water distribution pipe 24 are each equipped with a first solenoid valve, and the first solenoid valve is electrically connected to the controller 6.

[0023] In this embodiment, three concentric ring-shaped water distribution pipes are installed at the bottom of the anaerobic tank 2, namely, an inner water distribution pipe 22, a middle water distribution pipe 23, and an outer water distribution pipe 24. Each water distribution pipe has evenly distributed outlet holes 25, with the hole diameter decreasing from the inside to the outside. Each water distribution pipe is connected to a first solenoid valve. Through the coordinated action of the controller 6 and the water level sensor 11, adaptive flow regulation is achieved. The specific adaptive flow regulation strategy and working principle are as follows: a low water level threshold and a high water level threshold are set in the controller 6. The water level sensor 11 detects the inlet water level in real time. If the inlet water level is less than or equal to the low water level threshold, the controller 6 opens the first solenoid valve on the inner water distribution pipe 22, i.e., only the inner water distribution pipe 22 is opened. If the inlet water level is greater than the low water level threshold, the controller opens the first solenoid valve on the inner water distribution pipe 22. When the water level is below the high water level threshold, the controller 6 opens the first solenoid valves on the inner layer water distribution pipe 22 and the middle layer water distribution pipe 23, i.e., opens the inner layer water distribution pipe 22 and the middle layer water distribution pipe 23. If the water level is greater than or equal to the high water level threshold, the controller 6 opens the first solenoid valves on the inner layer water distribution pipe 22, the middle layer water distribution pipe 23 and the outer layer water distribution pipe 24, i.e., the three layers operate synchronously to prevent short circuits. By setting up three layers of concentric ring-shaped water distribution pipes, local water flow concentration can be avoided, sludge mixing efficiency can be improved, and the purpose of uniform water distribution can be achieved. At the same time, by setting up a flow adaptive adjustment strategy, it can automatically adjust when the water flow changes, so as to ensure treatment stability. In addition, the aperture of the outlet hole 25 adopts a gradient distribution design, which can effectively reduce the risk of blockage and extend the maintenance cycle.

[0024] In this embodiment, the swirling disturbance mixing structure includes a support 14, a motor 13, a rotating shaft 15, and rotating blades (not shown). The support 14 is fixedly installed on the top of the aerobic tank 3, the motor 13 is fixedly installed on the support 14, one end of the rotating shaft 15 is connected to the output end of the motor 13, and the other end is connected to the rotating blades. The rotating blades are arranged in the middle of the aerobic tank 3, and the tilt angle between the rotating blades and the horizontal plane is 30-45°.

[0025] In this embodiment, a frequency converter 12 for controlling the rotational speed of the rotating blades is also included.

[0026] In this embodiment, a swirling turbulence mixing structure is installed in the aerobic tank 3. This structure consists of a support 14, a motor 13, a rotating shaft 15, rotating blades, and a frequency converter 12. The rotation speed of the rotating blades is controlled by the frequency converter 12 (e.g., 50-100 rpm). After the sewage enters, an annular vortex is formed, which drives the activated sludge to mix with dissolved oxygen efficiently. In addition, by adjusting the rotation speed of the rotating blades to match different influent water qualities, the oxygen utilization rate can be increased by 15% and a stable flow state can be maintained.

[0027] In this embodiment, the pulse disturbance structure includes an inner pulse air pipe 26, a middle pulse air pipe 27, and an outer pulse air pipe 28. The inner pulse air pipe 26, the middle pulse air pipe 27, and the outer pulse air pipe 28 are distributed in a concentric ring structure extending outward at the bottom of the MBR membrane tank 4. An aeration hole 29 is provided at a distance of 0.5-1 meter on each of the inner pulse air pipe 26, the middle pulse air pipe 27, and the outer pulse air pipe 28.

[0028] In this embodiment, an air compressor 20 is also included. The output end of the air compressor 20 is connected to the pulse air pipe through the air supply pipe 21. The inner pulse air pipe 26, the middle pulse air pipe 27 and the outer pulse air pipe 28 are all equipped with electromagnetic pulse valves. The electromagnetic pulse valves are electrically connected to the controller 6.

[0029] In this embodiment, an MBR membrane module (not shown, which is prior art) is also included, disposed above the pulse perturbation structure.

[0030] In this embodiment, three concentric ring-shaped pulsed air pipes are arranged at the bottom of the MBR membrane tank 4, namely the inner pulsed air pipe 26, the middle pulsed air pipe 27, and the outer pulsed air pipe 28. The spacing between each layer of pipes is 0.5-1.0 meters, and axial openings (i.e., aeration holes 29) are provided. The controller 6 sets the pulse cycle (e.g., supplying air for 30 seconds every 10 minutes) and controls the opening and closing state of the electromagnetic pulse valve. Compressed air enters the MBR membrane tank 4 through the aeration holes 29 after passing through the air compressor 20, the electromagnetic pulse valve, and the pulsed air pipes. The pulsed airflow drives the water flow to move up and down, flushing the membrane surface and reducing the deposition of sludge on the membrane surface. Moreover, the intermittent disturbance strategy can reduce MBR membrane fouling and extend the cleaning cycle. Compared with continuous aeration, energy consumption can be reduced by 20% to 30%.

[0031] In this embodiment, a suction pump 17, a water pumping pipe 18, and a drain pipe 19 are also included. One end of the water pumping pipe 18 extends into the MBR membrane tank 4 and is arranged below the MBR membrane module, while the other end is connected to the input end of the suction pump 17. One end of the drain pipe 19 is connected to the output end of the suction pump 17, while the other end extends into the interior of the clear water tank 5.

[0032] In this embodiment, by setting up a suction pump 17, a water suction pipe 18, and a drain pipe 19, the treated water filtered by the MBR membrane can be transported to the clear water tank 5 for storage. At the same time, a water outlet pipe 7 with a second solenoid valve 8 is provided on the side of the clear water tank 5 to discharge the treated water. The second solenoid valve 8 is electrically connected to the controller 6 so that the controller 6 can regulate the opening and closing state of the second solenoid valve 8.

[0033] In this embodiment, a storage battery 9 and a solar cell module 10 are also included, and the solar cell module 10 and the controller 6 are electrically connected to the controller 6.

[0034] In this embodiment, the electrical components involved in this application, such as the water level sensor 11, the first solenoid valve, the motor 13, the air compressor 20, the electromagnetic pulse valve, the suction pump 17, and the second solenoid valve 8, are all electrically connected to the storage battery 9, and the storage battery 9 is electrically connected to the solar cell module 10, so as to supply power to this tank-type complete sewage treatment equipment in order to save energy consumption.

[0035] It should be noted that the original internal structural design and working principle of the anaerobic tank 2 and aerobic tank 3 involved in this application are all existing technologies, including but not limited to the working principle disclosed in CN215906050U. For example, in the anaerobic tank 2, in an oxygen-free environment, anaerobic microorganisms carry out anaerobic reactions on wastewater to achieve the functions of organic matter decomposition, pollutant transformation, and pretreatment; in the aerobic tank 3, under aeration, a large number of microorganisms in the activated sludge degrade or adsorb organic pollutants containing carbon, ammonia nitrogen, and phosphorus in the water to achieve the purpose of purifying water quality. Meanwhile, this utility model aims to improve the structural design of multi-layer water distribution, swirling mixing, and pulse disturbance.

[0036] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. A packaged wastewater treatment plant in the form of a tank, characterised in that include: The treatment tank and controller are provided. The interior of the treatment tank is divided into four fan-shaped areas along the circumference, which are arranged sequentially along the direction of wastewater flow as an anaerobic tank, an aerobic tank, an MBR membrane tank, and a clear water tank. Each fan-shaped area is separated by a partition. Water passage holes are provided at the upper end of the partition between the anaerobic tank and the aerobic tank, and at the upper end of the partition between the aerobic tank and the MBR membrane tank. The bottom of the anaerobic tank is provided with a multi-layer annular water distribution structure to prevent short-circuiting and ensure that the sludge is fully suspended and evenly contacts the wastewater. The aerobic tank is provided with a swirling disturbance mixing structure to drive the efficient mixing of activated sludge and dissolved oxygen. The bottom of the MBR membrane tank is provided with a pulse disturbance structure. A water level sensor is provided on the upper part of the inner wall of the anaerobic tank. The multi-layer annular water distribution structure, the swirling disturbance mixing structure, the pulse disturbance structure, and the water level sensor are electrically connected to the controller.

2. A packaged wastewater treatment tank according to claim 1, wherein The multi-layer annular water distribution structure includes an inner layer water distribution pipe, a middle layer water distribution pipe, and an outer layer water distribution pipe. The inner layer water distribution pipe, the middle layer water distribution pipe, and the outer layer water distribution pipe are distributed in a concentric ring structure extending outward at the bottom of the anaerobic tank. Water outlet holes are evenly distributed on the inner layer water distribution pipe, the diameter of the water outlet holes decreasing sequentially from the inner layer water distribution pipe to the outer layer water distribution pipe.

3. A packaged wastewater treatment tank according to claim 2, wherein Each of the inner, middle, and outer water distribution pipes is equipped with a first solenoid valve, which is electrically connected to the controller.

4. A packaged wastewater treatment tank according to claim 1, wherein The swirling turbulence mixing structure includes a support, a motor, a rotating shaft, and rotating blades. The support is fixedly installed on the top of the aerobic tank, the motor is fixedly installed on the support, one end of the rotating shaft is connected to the output end of the motor, and the other end is connected to the rotating blades. The rotating blades are arranged in the middle of the aerobic tank, and the tilt angle between the rotating blades and the horizontal plane is 30-45°.

5. A packaged wastewater treatment tank according to claim 4, wherein It also includes frequency converters for controlling the rotational speed of the blades.

6. A packaged wastewater treatment tank according to claim 4, wherein The pulse disturbance structure includes an inner pulse air pipe, a middle pulse air pipe, and an outer pulse air pipe. The inner, middle, and outer pulse air pipes are distributed in a concentric ring structure extending outwards at the bottom of the MBR membrane tank. An aeration hole is provided at a distance of 0.5-1 meter on each of the inner, middle, and outer pulse air pipes.

7. A packaged wastewater treatment tank according to claim 6, wherein It also includes an air compressor, the output end of which is connected to a pulse air pipe through an air delivery pipe. The inner, middle and outer pulse air pipes are each equipped with an electromagnetic pulse valve, which is electrically connected to the controller.

8. A packaged wastewater treatment tank according to claim 6, wherein It also includes the MBR membrane module positioned above the pulse perturbation structure.

9. A packaged wastewater treatment tank according to claim 8, wherein, It also includes a suction pump, a pumping pipe, and a drain pipe. One end of the pumping pipe extends into the MBR membrane tank and is positioned below the MBR membrane module, while the other end is connected to the input end of the suction pump. One end of the drain pipe is connected to the output end of the suction pump, while the other end extends into the clear water tank.

10. A packaged wastewater treatment tank according to claim 1, wherein It also includes a storage battery and a solar cell module, wherein the solar cell module and the controller are electrically connected to the controller.

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