An intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect

Abstract

This utility model relates to an intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect. It includes a housing and an intelligent control system. The housing is internally divided by partitions and perforated walls into an influent buffer tank, an anaerobic tank, a MABR membrane tank, an aerobic tank, a sedimentation buffer tank, a sedimentation tank, a return tank, a disinfection tank, and an equipment room. The intelligent control system includes a cabinet housing a touch screen, circuit breaker, electricity meter, fuse, DIN rail socket, fuse terminal, power module, CPU module, isolator, distribution terminal, electromagnetic relay, DTU, contactor, thermal relay, incoming line terminal, and distribution terminal. This utility model overcomes the problems of low denitrification efficiency, high energy consumption, large footprint, low level of intelligence, and inconvenience for internal equipment maintenance and replacement associated with traditional integrated wastewater treatment equipment. It is mainly used for small-scale, decentralized domestic wastewater treatment with high total nitrogen and low carbon-to-nitrogen ratio.

Description

Technical Field

[0001] This utility model belongs to the field of MABR membrane domestic wastewater treatment technology, specifically relating to an intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect. Background Technology

[0002] Total nitrogen removal has always been a major challenge in domestic wastewater treatment. Traditional denitrification processes mostly rely on activated sludge processes and their derivative technologies, achieving nitrification-denitrification reactions by creating alternating aerobic and anoxic environments, thereby achieving nitrogen removal. However, such processes have significant technical bottlenecks. First, the metabolic competition between nitrifying and denitrifying bacteria limits the reactor's volumetric loading capacity, resulting in denitrification efficiency generally below 80%. Furthermore, the activity of nitrifying and denitrifying bacteria is highly susceptible to low temperatures, affecting the stability of compliance. Second, the denitrification stage consumes a large amount of carbon source. For domestic wastewater with high total nitrogen and a low carbon-to-nitrogen ratio, additional carbon source needs to be added, increasing the cost per ton of water treated by 15%-30%. Third, the series connection of alternating aerobic and anoxic reaction tanks results in a large footprint, and aeration energy consumption during the reaction process accounts for 50% or even higher of the total system energy consumption.

[0003] In recent years, MABR membrane technology, with its counter-current gas-liquid mass transfer, enabling simultaneous nitrification and denitrification (SND) and allowing the denitrification process to be completed in a single reactor, has been increasingly applied in the wastewater treatment field. Existing integrated wastewater treatment equipment generally suffers from low denitrification efficiency, unstable effluent, poor membrane formation on packing materials, inconvenient maintenance and replacement due to its integrated and fixed installation, low level of intelligence, and the need for dedicated personnel for operation and management. Especially for small-scale, decentralized wastewater treatment scenarios, existing integrated wastewater treatment equipment struggles to achieve stable effluent compliance, and its rapid assembly and intelligent control hinder its large-scale application in typical scenarios such as towns and scenic areas. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned problems. This application proposes an intelligent prefabricated MABR wastewater treatment equipment that enhances the denitrification effect. A textile layer is attached to the surface of the MABR membrane to improve the membrane attachment effect, thereby increasing the number of microorganisms, enhancing the denitrification effect of wastewater treatment, and improving the stability of effluent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect, comprising a tank and an intelligent control system. The tank is internally divided into an inlet buffer tank, an anaerobic tank, a MABR membrane tank, an aerobic tank, a sedimentation buffer tank, a sedimentation tank, a return tank, a disinfection tank, and an equipment room via partitions and perforated walls. The inlet buffer tank has an inlet near the top, and an electromagnetic flow meter is installed on the inlet. The anaerobic tank contains an anaerobic tank mixer, and the MABR membrane tank contains a MABR membrane and an anoxic tank mixer. The aerobic tank is equipped with an aeration device and an internal reflux pump. The baffle between the sedimentation buffer zone and the sedimentation tank is a perforated flower wall. The sedimentation tank is a conical inclined tube sedimentation tank with inclined tube packing and a triangular weir inside. The triangular weir is connected to the disinfection tank. The outer wall of the disinfection tank has an outlet. The bottom of the sedimentation tank is connected to the reflux tank through a sedimentation tank sludge discharge pipe. The reflux tank is equipped with an external reflux pump and a sludge discharge pump. The outer wall of the reflux tank has a sludge discharge port. The equipment room is equipped with a protective door, and the protective door contains an aeration fan, a phosphorus removal dosing device, and a disinfection dosing device.

[0006] Furthermore: the intelligent control system includes a cabinet with a double-layer structure. The outer door has a glass observation window, and the upper middle part of the second-layer cabinet door has a touch screen. Inside the upper part of the cabinet, from left to right, there are a circuit breaker, an electricity meter, and a fuse. Below the fuse, there are a circuit breaker, a rail socket, and a fuse terminal. The core component inside the cabinet is a CPU module. The CPU module has a power module on its left and an isolator and power distribution terminals on its right. An electromagnetic relay and a DTU are located in the middle part of the cabinet. Below the electromagnetic relay, there are a contactor and a thermal relay. Terminals and power distribution terminals are located in the lower part of the cabinet, arranged in two rows.

[0007] Furthermore: the enclosure is made of corrugated carbon steel, with rock wool sandwich panels for insulation on the outside, and a steel ladder is installed on the side near the anaerobic pool, with a protective railing on the top.

[0008] Furthermore: water passage holes are provided on the partition; multiple sets of Φ50 water distribution holes are provided in the middle part of the perforated flower wall.

[0009] Furthermore: a textile layer is attached to the outer wall of the MABR membrane, and the MABR membrane is fixed by two limiting guide rods.

[0010] Preferred features: The anaerobic tank mixer is a hyperboloid mixer with a built-in rain cover and an IP65 motor protection rating; the anoxic tank mixer is a submersible mixer with a non-fixed installation.

[0011] Preferably, the aerator is connected to the MABR membrane tank and the aeration device respectively through process pipelines. The aeration blower is also equipped with a branch pipe that connects to the inlet tank of the phosphorus removal dosing device. The branch pipe is equipped with an electromagnetic valve and a manual valve.

[0012] Preferred: Both the phosphorus removal dosing device and the disinfection dosing device are skid-mounted equipment, integrating the dosing tank, dosing pump and level gauge into one unit.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This wastewater treatment equipment uses a traditional process coupled with a MABR membrane to enhance the denitrification effect and improve effluent stability. The overall denitrification efficiency is more than 20% higher than that of the traditional process. Furthermore, the high mass transfer performance of the MABR greatly reduces the energy consumption of the blower, and the overall energy consumption of the system is reduced by more than 30% compared with the traditional process. A dense textile layer is attached to the surface of the MABR membrane to improve the membrane attachment effect, thereby increasing the number of microorganisms.

[0015] This equipment is modularly assembled, making installation and replacement convenient. The wastewater treatment equipment can be maintained and replaced without shutting down. The intelligent control system can automatically regulate and record operating data, and it also has a fault alarm function, which greatly alleviates the shortcomings of manual maintenance and management.

[0016] This equipment is compact in size and can be flexibly configured according to the treatment scale and scenario, thus filling the gap and expanding the market for large-scale application of integrated sewage treatment equipment in small-scale, decentralized sewage treatment scenarios. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the technical solutions in the embodiments of this utility model or the prior art. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a plan view illustrating the overall structure of this utility model;

[0019] Figure 2 This is a frontal structural diagram of the overall structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the external shape of the intelligent control system of this utility model;

[0021] Figure 4 This is a schematic diagram of the external shape of the two-layer cabinet of the intelligent control system of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the intelligent control system of this utility model;

[0023] In the diagram: 1-box, 101-cabinet, 102-glass observation window, 103-touch screen, 104-circuit breaker, 105-electric meter, 106-fuse, 107-DIN rail socket, 108-fuse terminal, 109-power module, 110-CPU module, 111-isolated device, 112-distribution terminal, 113-electromagnetic relay, 114-DTU, 115-contactor, 116-thermal relay, 117-terminal, 118-distribution terminal;

[0024] 2-Inlet buffer zone, 3-Anaerobic tank, 4-MABR membrane tank, 5-Aerobic tank, 6-Sedimentation buffer zone, 7-Sedimentation tank, 8-Recirculation tank, 9-Disinfection tank, 10-Equipment room, 11-Inlet, 12-Outlet, 13-Sludge discharge port, 14-Anaerobic tank mixer, 15-MABR membrane module, 16-Anoxic tank mixer, 17-Aeration device, 18-Internal recirculation pump, 19-External recirculation pump, 20-Sludge pump, 2 1-Aeration blower, 22-Phosphorus removal dosing device, 23-Disinfection dosing device, 24-Baffle plate, 25-Perforated flower wall, 26-Sedimentation tank sludge discharge pipe, 27-Inclined tube packing, 28-Triangular weir, 29-Electromagnetic flow meter, 30-Vortex flow meter, 31-Solenoid valve, 32-Manual valve, 33-Process piping, 34-Limiting guide rod, 35-Steel ladder, 36-Guard railing, 37-Rock wool sandwich panel, 38-Protective door. Detailed Implementation

[0025] To enable those skilled in the art to better understand and implement the technical solution of this utility model, the present utility model will be further described below with reference to specific embodiments. However, the embodiments described are only for illustration and are not intended to limit the present utility model.

[0026] like Figures 1-2The diagram illustrates an intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect. It includes a housing 1 and an intelligent control system. The housing 1 is constructed of corrugated carbon steel plate with external rock wool sandwich panel 37 for insulation. Internally, the housing 1 is divided by partitions 24 and perforated walls 25 into an inlet buffer tank 2, an anaerobic tank 3, a MABR membrane tank 4, an aerobic tank 5, a sedimentation buffer tank 6, a sedimentation tank 7, a return tank 8, a disinfection tank 9, and an equipment room 10. A steel ladder 35 is installed on the exterior of the housing 1 near the anaerobic tank. An inlet 11 is located near the top of the inlet buffer tank 2, and an electromagnetic inlet is installed on the inlet 11. Meter 29; The anaerobic tank 3 is equipped with an anaerobic tank mixer 14, which is a hyperboloid mixer with a built-in rain cover and a motor protection rating of IP65; The aerobic tank 5 is equipped with an aeration device 17 and an internal return pump 18, which is connected to the front end of the MABR membrane tank 4 through a process pipeline 33. The MABR membrane tank 4 is equipped with a MABR membrane 15 and an anoxic tank mixer 16. The outer wall of the MABR membrane 15 is attached with a textile layer, and the MABR membrane 15 is fixed by two limiting guide rods 34. The anoxic tank mixer 16 is a submersible mixer and is installed without fixed installation.

[0027] The perforated flower wall 25 is located between the sedimentation buffer zone 6 and the sedimentation tank 7, and multiple sets of Φ50 water distribution holes are provided in the middle part of the perforated flower wall. The sedimentation tank 7 is a conical inclined tube sedimentation tank, and inclined tube packing 27 and triangular weir 28 are installed inside. The triangular weir 28 is connected to the disinfection tank 9. The outer wall of the disinfection tank 9 is provided with an outlet 12. The bottom of the sedimentation tank 7 is connected to the return tank 8 through the sedimentation tank sludge discharge pipe 26. The return tank 8 is provided with an external return pump 19 and a sludge discharge pump 20. The outer wall of the return tank 8 is provided with a sludge discharge port 13. The external return pump 19 is connected to the inlet buffer tank 2 through the process pipeline 33.

[0028] The internal reflux pump 18, external reflux pump 19, and sludge discharge pump 20 are all submersible sludge discharge pumps, installed in a coupled manner.

[0029] The equipment room 10 is equipped with a protective door 38. Inside the protective door 38 are an aeration fan 21, a phosphorus removal dosing device 22, and a disinfection dosing device 23. The aeration fan 21 is connected to the MABR membrane 15 and the aeration device 17 respectively through process pipes 33. The process pipe connected to the MABR membrane 15 is equipped with a vortex flow meter 30 and a manual valve 32. The aeration fan 21 is also equipped with a branch pipe connected to the inlet tank of the phosphorus removal dosing device 22. The branch pipe is equipped with a solenoid valve 31 and a manual valve 32. The phosphorus removal dosing device 22 and the disinfection dosing device 23 are both skid-mounted devices, integrating the dosing tank, dosing pump, and level gauge into one unit.

[0030] Preferably, except for the main pipe of the aeration blower located in the equipment room, which is made of carbon steel, all other pipes of the process pipeline 33 are made of PVC-U material.

[0031] like Figures 3-5 As shown, the intelligent control system includes a cabinet 101, which has a double-layer structure. The outer door has a glass observation window 102. A touch screen 103 is located in the middle of the upper part of the second-layer door. Inside the upper part of the cabinet 101, from left to right, are arranged a circuit breaker 104, an electricity meter 105, and a fuse 106. Below the fuse 106 are the circuit breaker 104, a rail socket 107, and a fuse terminal 108. The core of the cabinet 101... The component is a CPU module 110; a power module 109 is arranged on the left side of the CPU module 110, and an isolator 111 and a power distribution terminal 112 are arranged on the right side; an electromagnetic relay 113 and a DTU 114 are arranged in the middle part of the cabinet 101; a contactor 115 and a thermal relay 116 are arranged below the electromagnetic relay 113; a terminal 117 and a power distribution terminal 118 are arranged in the lower part of the cabinet 101, and the terminal 117 and the power distribution terminal 118 are arranged in two rows.

[0032] Workflow:

[0033] The wastewater treatment equipment operates through an intelligent control system. Wastewater enters the inlet buffer tank through the inlet and flows sequentially through the anaerobic tank, MABR tank, aerobic tank, sedimentation buffer zone, sedimentation tank, and disinfection tank before being discharged from the outlet. Aeration blowers provide aeration for the MABR membrane in the MABR tank and the aeration devices in the aerobic tank. The sludge-water mixture in the aerobic tank flows into the sedimentation buffer zone and is then evenly distributed through a perforated flower wall before entering the sedimentation tank. Part of the sludge-water mixture in the aerobic tank is returned to the MABR membrane tank via an internal return pump. Simultaneously, the phosphorus removal dosing device adds phosphorus removal agent to the inlet of the sedimentation tank for chemical phosphorus removal. The sludge in the sedimentation tank is discharged to the return tank through the sedimentation tank sludge discharge pipe and then pumped to the inlet buffer tank at the front end by an external return pump to replenish the sludge concentration at the front end. The remaining sludge is discharged from the sludge discharge outlet by the sludge discharge pump. The supernatant in the sedimentation tank flows to the disinfection tank through a triangular weir and is disinfected by a disinfection dosing device. After meeting the standards, it is discharged from the outlet.

[0034] All content not described in detail in this utility model is prior art.

[0035] It should be noted that the above descriptions are all part of the structure of this utility model. Without departing from the technical principles of this application, those skilled in the art can combine the technical solutions in the above embodiments, or make equivalent changes or substitutions to the relevant technical features. Any changes or equivalent substitutions made within the technical concept and / or technical principles of this application will fall within the protection scope of this application.

Claims

1. An intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect, comprising a tank (1) and an intelligent control system, wherein the tank (1) is internally divided into an influent buffer tank (2), an anaerobic tank (3), a MABR membrane tank (4), an aerobic tank (5), a sedimentation buffer zone (6), a sedimentation tank (7), a return tank (8), a disinfection tank (9), and an equipment room (10) by partitions (24) and perforated flower walls (25), characterized in that: The inlet buffer tank (2) has an inlet (11) near the top of the tank, and an electromagnetic flow meter (29) is installed on the inlet (11). The anaerobic tank (3) is equipped with an anaerobic tank mixer (14). The MABR membrane tank (4) is equipped with a MABR membrane (15) and an anoxic tank mixer (16). The aerobic tank (5) is equipped with an aeration device (17) and an internal return pump (18). The baffle between the sedimentation buffer zone (6) and the sedimentation tank (7) is a perforated flower wall (25). The sedimentation tank (7) is a conical inclined tube sedimentation tank with inclined tube packing installed inside. (27) and triangular weir (28), the triangular weir (28) is connected to the disinfection tank (9), the disinfection tank (9) has an outlet (12) on its outer wall, the bottom of the sedimentation tank (7) is connected to the return tank (8) through the sedimentation tank sludge discharge pipe (26), the return tank (8) is equipped with an external return pump (19) and a sludge discharge pump (20), and the return tank (8) has a sludge discharge port (13) on its outer wall; the equipment room (10) is equipped with a protective door (38), and the protective door (38) is equipped with an aeration blower (21), a phosphorus removal dosing device (22) and a disinfection dosing device (23).

2. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The intelligent control system includes a cabinet (101), which has a double-layer structure. The outer door has a glass observation window (102). A touch screen (103) is located in the middle of the upper part of the second-layer cabinet door. Inside the upper part of the cabinet (101), from left to right, are arranged a circuit breaker (104), an electricity meter (105), and a fuse (106). Below the fuse (106), the circuit breaker (104), a rail socket (107), and a fuse terminal (108) are arranged. The core components inside the cabinet (101) are... CPU module (110); a power module (109) is provided on the left side of the CPU module (110), and an isolator (111) and a power distribution terminal (112) are provided on the right side; an electromagnetic relay (113) and a DTU (114) are provided in the middle part of the cabinet (101); a contactor (115) and a thermal relay (116) are provided below the electromagnetic relay (113); a terminal (117) and a power distribution terminal (118) are provided in the lower part of the cabinet (101), and the terminal (117) and the power distribution terminal (118) are arranged in two rows.

3. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The box (1) is made of corrugated carbon steel plate, and the outside is insulated with rock wool sandwich panel (37). A steel ladder (35) is installed on the side near the anaerobic pool (3), and a protective railing (36) is installed on the top.

4. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The partition (24) has water passage holes; the perforated flower wall (25) has multiple sets of Φ50 water distribution holes in the middle part.

5. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The outer wall of the MABR membrane (15) is covered with a textile layer, and the MABR membrane (15) is fixed by two limiting guide rods (34).

6. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The anaerobic tank mixer (14) is a hyperboloid mixer with a built-in rain cover and a motor protection rating of IP65; the anoxic tank mixer (16) is a submersible mixer with a non-fixed installation.

7. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The internal reflux pump (18), external reflux pump (19) and sludge pump (20) are all submersible sludge pumps, installed in a coupled manner. The internal reflux pump (18) is connected to the front end of the MABR membrane tank (4) through the process pipeline (33), and the external reflux pump (19) is connected to the inlet buffer tank (2) through the process pipeline (33).

8. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: The aeration blower (21) is connected to the MABR membrane tank (4) and the aeration device (17) respectively through the process pipeline (33). The aeration blower (21) is also provided with a branch pipe connected to the inlet tank of the phosphorus removal dosing device (22). The branch pipe is equipped with a solenoid valve (31) and a manual valve (32).

9. The intelligent prefabricated MABR wastewater treatment equipment with enhanced denitrification effect according to claim 1, characterized in that: Both the phosphorus removal dosing device (22) and the disinfection dosing device (23) are skid-mounted devices that integrate a dosing tank, a dosing pump and a level gauge.

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