Modular lifting type intelligent sewage aeration system and control method

Abstract

The invention relates to a modular lifting type intelligent sewage aeration system which comprises a plurality of modular aeration units, and each modular aeration unit comprises an aeration assembly, a lifting assembly, a quick-assembly and quick-disassembly assembly and an intelligent control assembly. The invention further relates to a control method of the modularized lifting type intelligent sewage aeration system. The modularized lifting type intelligent sewage aeration system comprises a data acquisition module, a feedforward prediction module, a feedback correction module and a dynamic optimization module. The design is simplified, and use, management and daily maintenance are facilitated; the service life of the aerator is prolonged, the energy consumption is reduced, and the operation cost is saved; maintenance without cutting off water is realized, maintenance cost is reduced, and enterprise production is not affected; a worker can perform maintenance without entering the pool, so that the maintenance time is shortened, and the safety is improved; omnibearing perception and accurate acquisition of key environment indexes are realized, and intelligent control is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a modular lifting type sewage intelligent aeration system and a control method thereof. Background Art

[0002] The activated sludge process occupies a core position in the field of sewage biological treatment. To ensure the stable operation of the activated sludge system, a specific concentration of dissolved oxygen needs to be maintained in the water body. As the core equipment for realizing aerobic sewage treatment, the performance of the aeration device directly affects the sewage treatment efficiency and the compliance level of the effluent quality. In terms of the functional mechanism, the aeration device injects oxygen into the sewage system, effectively promoting the proliferation and metabolic activities of aerobic microorganisms, and then accelerating the degradation process of organic pollutants. At the same time, the device inhibits sludge sedimentation through the water body stirring effect, significantly improving the uniformity and system stability of the sewage treatment process.

[0003] With the accelerating advancement of industrialization and urbanization, the demand for sewage treatment shows a continuous upward trend. Due to technical bottlenecks such as inflexible operation adjustment, inconvenient maintenance, low intelligence, and insufficient adaptability in traditional aeration technologies, it has been difficult to meet the compound requirements of modern sewage treatment for high efficiency, energy conservation, and operation convenience.

[0004] Most of the traditional aeration devices in the prior art are fixedly installed, and have the following defects:

[0005] Most of the traditional aeration devices are fixedly installed, and have the following pain points:

[0006] 1). Water supply needs to be stopped for maintenance: When the aeration membrane is blocked or damaged, the water tank needs to be emptied, interrupting the treatment process and affecting the efficiency; during routine maintenance operations, the entire tank body must be completely emptied. This mandatory emptying will lead to unplanned shutdowns of the production line. According to the enterprise operation data, the direct economic loss caused by each production stoppage can reach 15%-20% of the daily output value, and the chain reaction caused by sudden shutdowns often leads to a decrease in the efficiency of surrounding processes, forming indirect losses that are difficult to quantify.

[0007] 2). Inconvenient disassembly: Most of the traditional aeration pipeline connection methods use flange connection or welding. The disassembly is completed in the pool, and manual operation is inconvenient and time-consuming. Especially in a local narrow working space, the bolts need to be disassembled by using special tools to repeatedly adjust the force application angle, and the replacement of the sealing rubber ring requires strict procedures, resulting in low overall maintenance efficiency.

[0008] 3). It is difficult to position the lifting device, and the installation requirements are high. Typically, for example, in the application with the application number CN105776511A, one end is fixed and the wire rope is used for lifting. When the lifting is stable, it is difficult to be stable, and it is difficult to position the positioning joint of the aeration device. If there are deviations in height and horizontal direction, it needs to be manually adjusted multiple times to complete the docking.

[0009] 4). Poor flexibility: Traditional aeration systems are limited by fixed structures and preset parameters, showing significant limitations when dealing with water quality fluctuations and changes in treatment loads. With the continuous progress of urban development and industrialization, the quantity and quality of sewage emissions will change. When the concentration of influent pollutants surges or the treatment water volume fluctuates significantly, it is difficult for this system to dynamically adjust the aeration intensity and distribution range through existing devices, resulting in a continuous decline in treatment efficiency. Such rigid structural characteristics lead to insufficient system adaptability, especially in sudden water pollution incidents, where its technical shortcomings are particularly prominent.

[0010] 5). Low intelligence: Conventional aeration systems lack an intelligent condition monitoring system and still rely on traditional manual inspections and regular maintenance modes. This passive management leads to a significant lag in fault detection. Actual cases show that abnormalities in key components are often detected only after 8 - 12 hours of continuous operation, during which irreversible damage has occurred to the equipment. More seriously, due to the lack of real-time data warning, the response time of the operation and maintenance team when a sudden failure occurs exceeds 45 minutes on average, directly resulting in a 30% - 50% decrease in treatment efficiency and seriously affecting production continuity and the qualified rate of produced water. Summary of the Invention

[0011] The present invention addresses the above problems by providing a modular lifting type intelligent sewage aeration system and a control method, aiming to simplify the design, facilitate use, management, and daily maintenance; extend the service life of aerators, reduce energy consumption, and save operating costs; enable maintenance without stopping water, with low maintenance costs and no impact on enterprise production; allow maintenance personnel to perform maintenance without entering the tank, shortening the maintenance time and improving safety; achieve all-round perception and accurate collection of key environmental indicators, and realize intelligent control.

[0012] To solve the above problems, the technical solution provided by the present invention is as follows:

[0013] The modular lifting type intelligent sewage aeration system includes a plurality of modular aeration units. Each modular aeration unit includes an aeration component, a lifting component, a quick-installation and quick-disassembly component, and an intelligent control component, where:

[0014] The aeration component is used to provide dissolved oxygen that meets the process requirements for the sewage; the lifting component is installed on one side of the aeration component; the lifting component is used to fix the modular aeration unit to the pool body and, when equipment maintenance is required, cooperate with a lifting device to lift the modular aeration unit out of the pool body; the quick-installation and quick-disassembly component is installed on the side of the aeration component away from the lifting component and is used to connect and disconnect the aeration component from the main aeration pipe; the intelligent control component is arranged at the connection between the quick-installation and quick-disassembly component and the main aeration pipe, and the intelligent control component is electrically signal-coupled to the control system; the intelligent control component is used to collect the air pressure data of the component pipeline and then transmit it to the control system, and is used to receive the control signal of the control system and adjust the air supply volume of the aeration component.

[0015] Preferably, the aeration component includes a tube aerator, a distribution pipe, a gas-blocking head, a support device, and an aeration branch pipe, where: the tube aerator is communicated with the distribution pipe and is evenly distributed on the distribution pipe, and the tube aerator is used to convert the air from the blower into tiny bubbles, so as to provide dissolved oxygen that meets the process requirements for the sewage; the distribution pipe is of a frame structure and is used to evenly distribute the air volume of the aeration branch pipe to each tube aerator; the gas-blocking head is detachably installed at the position on the distribution pipe where the tube aerator does not need to be installed for plugging; one side of the aeration branch pipe is communicated with the distribution pipe, and the other side is communicated with the main aeration pipe; the support device is fixedly arranged on both sides of the aeration component and is used to improve the stability of the modular aeration unit; a lifting ring for auxiliary lifting is arranged at the top of the aeration branch pipe.

[0016] Preferably, the diameter of the tube aerator is 67 mm, the length is 1 m, the air ventilation volume is 4 - 6 m3 / h·piece, and the diaphragm is made of EPDM material; every two tube aerators are symmetrically installed on the distribution pipe through a connector; the connector is a stainless steel screw M10 with a length of not less than 210 mm and is equipped with a 45 mm EPDM sealing joint; the distribution pipe is made of 304 stainless steel, and its cross-section is a square with a side length of 80 mm and a thickness of 4 mm; 16 - 28 tube aerators are allocated to a single distribution pipe.

[0017] Preferably, the lifting assembly includes a guide rod, a lifting rod, a special lifting boom, a lifting ring, and a fixing ring. Specifically: The guide rod is fixedly connected to the pool wall and is used to position the modular aeration unit; the bottom end of the lifting rod is fixedly connected to the aeration assembly, and the lifting ring is provided at the top; the lifting ring is used to connect the supporting special lifting boom and cooperate with the lifting equipment to lift the modular aeration unit out of the pool; the special lifting boom is used to balance the force of the lifting assembly; multiple fixing rings are provided in the middle of the lifting rod; the fixing ring adopts an open structure, with one end fixed to the lifting rod and the other end slidably sleeved on the guide rod.

[0018] Preferably, the special lifting boom includes a steel wire rope, a balance rod, a hook, and a lifting lug; both ends of the steel wire rope are fixedly connected to the balance rod near both ends by full welding; multiple groups of lifting lugs are provided below the balance rod; the hook is provided on the lifting lug.

[0019] Preferably, the quick installation and disassembly assembly includes a magnetic quick installation joint and a metal hose; the lower end of the metal hose is communicated with the upper end of the aeration branch pipe, and the upper end of the metal hose is communicated with the lower end of the elbow connecting the aeration main pipe; the metal hose is used to eliminate axial and lateral installation errors; two connecting ends of the magnetic quick installation joint are respectively installed at the upper end of the elbow and the connecting end of the aeration main pipe; the magnetic quick installation joint is used to separate and install the aeration assembly and the aeration main pipe.

[0020] Preferably, the magnet of the magnetic quick installation joint adopts an N45 grade neodymium iron boron permanent magnet array; the magnets are arranged in a ring on the interface end face of the magnetic quick installation joint; the magnets are embedded in a 304 stainless steel collar, the surface is nickel-plated, and the nickel-plating thickness is ≥25μm; multiple groups of spring steel claws are provided at the interface of one connecting end of the magnetic quick installation joint, and a conical surface structure is provided at the interface of the other connecting end; the spring steel claws are engaged with the conical surface structure; an EPDM trapezoidal sealing ring and a PTFE compression ring are provided at the connection of the two connecting ends of the magnetic quick installation joint.

[0021] Preferably, the intelligent control assembly includes an electric valve and a pressure sensor; the electric valve is arranged on the connecting pipeline between the aeration main pipe and the quick installation and disassembly assembly; the electric valve is used to adjust the air supply volume of the aeration assembly; the pressure sensor is arranged on the connecting pipeline between the electric valve and the quick installation and disassembly assembly; the pressure sensor is used to collect the air pressure data of the component pipeline and then transmit it to the control system.

[0022] The control method using the modular lifting type sewage intelligent aeration system includes a data acquisition module, a feedforward prediction module, a feedback correction module, and a dynamic optimization module. Specifically:

[0023] The data acquisition module collects the influent flow rate through a flow meter and collects the dissolved oxygen data of the water tank through a dissolved oxygen meter; the dissolved oxygen data collects multiple segments of values corresponding to the water tank scale or the grouping situation of the modular aeration unit; the intelligent control component collects the air pressure data of a single modular aeration unit; the COD influent data and COD effluent data are collected through an on-line COD analyzer in the sewage treatment plant;

[0024] The feedforward prediction module predicts the oxygen demand based on the real-time change rate of the influent flow rate;

[0025] The feedback correction module dynamically adjusts the opening degrees of the electric valves according to the dissolved oxygen data according to the PID control algorithm, and then automatically adjusts the air volume of the fan;

[0026] The dynamic optimization module predicts the oxygen transfer coefficient and saturated dissolved oxygen concentration through a machine learning model to adapt to water quality fluctuations; and dynamically adjusts the valve opening degrees through a valve dynamic distribution algorithm to balance the values of the air pressure data and the dissolved oxygen data.

[0027] Preferably, the dissolved oxygen data includes the front-segment dissolved oxygen data, middle-segment dissolved oxygen data, and rear-segment dissolved oxygen data of the water tank;

[0028] The prediction algorithm of the oxygen demand is expressed by the following formula:

[0029] R o =K La ×(C * -C)×Q1

[0030] Where: R o is used to represent the oxygen demand; K La is used to represent the oxygen transfer coefficient, which is related to the aeration volume and sewage characteristics; C * is used to represent the saturated dissolved oxygen concentration; C is used to represent the current dissolved oxygen concentration, taking the weighted average of the front-segment dissolved oxygen data, middle-segment dissolved oxygen data, and rear-segment dissolved oxygen data; Q1 is used to represent the influent flow rate;

[0031] In the feedback correction module, the target value of the front-segment dissolved oxygen data is set to 1.5 mg / L, the target value of the rear-segment dissolved oxygen data is set to 2.0 mg / L, and the target value of the middle-segment dissolved oxygen data is limited to be less than or equal to 0.5 mg / L;

[0032] The PID control algorithm adjusts the aeration volume through proportional, integral, and differential terms, and is expressed by the following formula:

[0033]

[0034] Among them: u(t) is used to represent the frequency of the blower for controlling the output; e(t) is used to represent the error; K p is used to represent the proportional gain coefficient; K i is used to represent the integral gain coefficient; K d is used to represent the differential gain coefficient;

[0035] The error is the difference between the target value and the actual value of the set dissolved oxygen data, and is expressed by the following formula:

[0036] e(t) = DO set - DO1

[0037] Among them: DO set is used to represent the target value of the dissolved oxygen data; DO1 is used to represent the dissolved oxygen data of the previous stage;

[0038] The valve dynamic distribution algorithm is expressed by the following formula:

[0039]

[0040] Among them: V i is used to represent the valve opening; Q 2,req is used to represent the total required aeration volume; n is used to represent the number of branch pipes; ΔV i is used to represent the dynamic correction term; P set is used to represent the set pressure; P real is used to represent the actual pressure;

[0041] The pressure compensation and valve linkage adjustment algorithm when the valve dynamic distribution algorithm dynamically adjusts the valve opening is expressed by the following formula:

[0042] K v = f(Q2, P)

[0043] Among them: K v represents the valve linkage adjustment coefficient, and satisfies K v = 0.3; f(Q2, P) is used to represent the non-linear fusion pressure compensation and load regulation, and is used to coordinate the actions of multi-branch pipe valves and suppress the gas volume fluctuation.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1. Since the present invention adopts a modular aeration unit, modular increase and decrease can be carried out for different sewage treatment scales, thereby simplifying the design and facilitating use, management and daily maintenance.

[0046] 2. Since the present invention can flexibly configure the aerators for projects with periodic changes in different water qualities and water volumes, it not only improves the service life of the aerators, but also reduces unnecessary energy consumption and saves operation costs.

[0047] 3. Since the aeration device of the present invention can be lifted as a whole, maintenance can be carried out without stopping the water supply, with low maintenance costs and no impact on the production of enterprises.

[0048] 4. Since the present invention adopts quick-release and quick-install joints, the maintenance personnel can carry out maintenance without entering the pool, with short maintenance time and guaranteed personal safety.

[0049] 5. Since the present invention adopts an advanced multi-dimensional monitoring architecture and is equipped with multi-parameter monitoring modules, it realizes all-round perception and accurate collection of key environmental indicators, and realizes intelligent control. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic structural diagram of the modular lifting type intelligent aeration system according to a specific embodiment of the present invention;

[0051] Figure 2 is a schematic plan view of the aeration module according to a specific embodiment of the present invention;

[0052] Figure 3a is a schematic separated structure diagram of the quick-install component according to a specific embodiment of the present invention;

[0053] Figure 3b is a schematic connection structure diagram of the quick-install component according to a specific embodiment of the present invention;

[0054] Figure 4 is a schematic diagram of the suspension rod according to a specific embodiment of the present invention;

[0055] Figure 5 is a schematic lifting diagram according to a specific embodiment of the present invention;

[0056] Figure 6 is a schematic system control flow diagram according to a specific embodiment of the present invention.

[0057] Wherein: A. Aeration component, B. Lifting component, C. Quick-install and quick-release component, D. Intelligent control component, E. Aeration main pipe, F. Pool wall, 1. Tube type aerator, 2. Air distribution pipe, 3. Air blocking head, 4. Support device, 5. Aeration branch pipe, 6. Guide rod, 7. Lifting rod, 8. Special lifting suspension rod, 9. Lifting ring, 10. Magnetic fast-install joint, 11. Metal hose, 12. Electric valve, 13. Pressure sensor, 14. Fixed ring, 15. Ring, 16. Elbow, 8.1. Steel wire rope, 8.2. Balance rod, 8.3. Hook, 8.4. Lifting lug, 10.1. Spring steel claw, 10.2. Conical surface structure DETAILED DESCRIPTION OF THE INVENTION

[0058] The present invention will be further illustrated below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art's various equivalent modifications of the present invention all fall within the scope defined by the appended claims of this application.

[0059] The modular lifting type intelligent sewage aeration system includes a plurality of modular aeration units, such as Figure 1 , 2 As shown in 5, each modular aeration unit includes an aeration component A, a lifting component B, a quick-installation and quick-disassembly component C, and an intelligent control component D, where:

[0060] The aeration component A is used to provide dissolved oxygen that meets the process requirements for sewage; the lifting component B is installed on one side of the aeration component A; the lifting component B is used to fix the modular aeration unit to the pool body and is used to cooperate with the lifting equipment to lift the modular aeration unit out of the pool body during equipment maintenance; the quick-installation and quick-disassembly component C is installed on the side of the aeration component A away from the lifting component B and is used to connect and disconnect the aeration component A from the main aeration pipe E; the intelligent control component D is arranged at the connection between the quick-installation and quick-disassembly component C and the main aeration pipe E, and the intelligent control component D is electrically signal-coupled to the control system; the intelligent control component D is used to collect the air pressure data of the component pipeline and then transmit it to the control system, and is used to receive the control signal of the control system and adjust the air supply volume of the aeration component A.

[0061] It should be noted that a plurality of modular aeration units, combined with a sewage system dissolved oxygen meter, a blower, and a plant central control system, form a complete sewage treatment aeration system.

[0062] It should be noted that the aeration component A includes a tube-type aerator 1, a distribution pipe 2, a gas plug 3, a support device 4, and an aeration branch pipe 5, where: the tube-type aerator 1 is communicated with the distribution pipe 2 and is evenly distributed on the distribution pipe 2, and the tube-type aerator 1 is used to convert the air from the blower into tiny bubbles, so as to provide dissolved oxygen that meets the process requirements for sewage; the distribution pipe 2 is a frame structure and is used to evenly distribute the air volume of the aeration branch pipe 5 to each tube-type aerator 1, making the local aeration uniform and beneficial to the stability of the system; the gas plug 3 is detachably installed at the position of the distribution pipe 2 where the tube-type aerator 1 does not need to be installed for plugging; one side of the aeration branch pipe 5 is communicated with the distribution pipe 2, and the other side is communicated with the main aeration pipe E; the support device 4 is fixedly arranged on both sides of the aeration component A and is used to improve the stability of the modular aeration unit, making the aeration system form a whole, more stable, and beneficial to the overall lifting of the aeration device; a lifting ring 15 for auxiliary lifting is arranged at the top of the aeration branch pipe 5.

[0063] In this specific embodiment, the tube aerator 1 has a diameter of 67 mm, a length of 1 m, an air flow rate of 4 - 6 m3 / h per unit, and the diaphragm is made of EPDM material. Every two tube aerators 1 are symmetrically installed on the air distribution pipe 2 through connectors. The connector is a stainless steel screw M10 with a length of not less than 210 mm, and is equipped with a 45 mm EPDM sealing joint. The air distribution pipe 2 is made of 304 stainless steel, with a square cross-section with a side length of 80 mm and a thickness of 4 mm. Each single air distribution pipe 2 is equipped with 16 - 28 tube aerators 1. At the same time, the air distribution pipe 2 acts as a skeleton and forms a firm whole in combination with the support device 4.

[0064] Places where the tube aerator 1 does not need to be installed can be blocked by a detachable air-blocking head 3. When the tube aerator 1 needs to be installed, the air-blocking head 3 is removed and then the tube aerator 1 is installed.

[0065] Therefore, the total air flow rate of a single group of aeration components A is 80 - 140 m3 / h. For general municipal sewage, the corresponding sewage treatment scale is about 8 - 14 m3 / h. The number of components is designed according to the total water volume. For example, for a municipal sewage treatment plant with a treatment scale of 10,000 tons per day, 30 sets of this aeration component A are required. When the water volume is small in the early stage, a single group of aeration components A can be equipped with 16 tube aerators 1. When the water quality and water volume increase later, the number of tube aerators 1 can be gradually increased to 28.

[0066] It should be noted that the lifting component B includes a guide rod 6, a lifting rod 7, a special lifting boom 8, a lifting ring 9, and a fixing ring 14, where: the bottom of the guide rod 6 is fixed to the bottom of the pool, and the middle of the guide rod 6 is fixedly connected to the pool wall F through a cross brace and is used to position the modular aeration unit; the bottom end of the lifting rod 7 is fixedly connected to the aeration component A, and a lifting ring 9 is provided at the top; the lifting ring 9 is used to connect the supporting special lifting boom 8 and cooperate with the lifting equipment to lift the modular aeration unit out of the pool; the special lifting boom 8 is used to balance the force of the lifting component B; multiple fixing rings 14 are provided in the middle of the lifting rod 7; the fixing ring 14 has an open structure, one end of which is fixed to the lifting rod 7 and the other end is slidably sleeved on the guide rod 6.

[0067] In this specific embodiment, the guide rod 6 is made of SS304 - DN50 with a thickness of 3 mm.

[0068] It should be further noted that the lifting rod 7 is connected to the support device 4 and is used for the lifting force of the modular aeration unit. The open structure of the fixing ring 14 enables the entire aeration module to be both positioned and avoid the guide rod 6 and the wall support member to achieve lifting. The lifting ring 15 is fixed below the metal hose 11 to prevent the metal hose 11 from being stressed during lifting.

[0069] Such as Figure 4As shown in the figure, it should be further noted that the special lifting boom 8 includes a steel wire rope 8.1, a balance rod 8.2, a hook 8.3, and a lifting lug 8.4; both ends of the steel wire rope 8.1 are fixedly connected to the balance rod 8.2 near both ends by full welding; multiple groups of lifting lugs 8.4 are arranged below the balance rod 8.2; hooks 8.3 are arranged on the lifting lugs 8.4.

[0070] In this specific embodiment, the balance rod 8.2 of the special lifting boom 8 is made of Q235, a steel pipe with a model of DN150*4mm, and multiple groups of lifting lugs 8.4 are designed to meet lifting in different situations. It is lifted by a 304 stainless steel wire rope 8.1.

[0071] It should be further noted that the lifting assembly B lifts the bottom aeration assembly A out of the pool through a lifting device for equipment maintenance. The lifting assembly B is connected to the lifting ring 9 through the special lifting boom 8 for overall lifting.

[0072] During the lifting process, the electric valve 12 is closed, the magnetic fast - fitting joint 10 is disconnected, and after the hook of the special lifting boom 8 is docked with the lifting ring 9 and the lifting ring 15, it can be vertically lifted. It can be placed on the surrounding open space for maintenance of the aeration device. There is no need to cut off water, which does not affect the normal operation of the sewage system and enterprise production, and the maintenance cost is low.

[0073] After the maintenance is completed, the lifting device hoists the aeration module above the installation area, positions it through the fixing ring 14 and the guide rod 6, and then slowly lowers it to the bottom. After fixing it through the magnetic fast - fitting joint 10, the lifting ring can be loosened to complete the operation.

[0074] The total weight of the lifting part of the modular aeration unit is less than 500KG, and the lifting height is about 8 meters. Therefore, according to the distance of lifting, a conventional 16 - 50 - ton crane can be selected. The maintenance of a group of modular aeration units can be completed within 2 hours. Conventional pool drainage, maintenance, and water inlet generally take 2 days. The present invention greatly saves the maintenance time. At the same time, other components and the entire sewage treatment system are not affected during the maintenance period, improving the convenience of maintenance.

[0075] It should be noted that as shown in Figure 3, the quick - installation and quick - disassembly component C includes a magnetic fast - fitting joint 10 and a metal hose 11; the lower end of the metal hose 11 is communicated with the upper end of the aeration branch pipe 5, and the upper end of the metal hose 11 is communicated with the lower end of the elbow 16 connecting to the aeration main pipe E; the metal hose 11 is used to eliminate axial and lateral installation errors; the upper end of the elbow 16 and the connection end of the aeration main pipe E are respectively installed with the two connection ends of the magnetic fast - fitting joint 10; the magnetic fast - fitting joint 10 is used to separate and install the aeration assembly A and the aeration main pipe E.

[0076] It should be further noted that the magnet of the magnetic quick-connect fitting 10 is an N45 grade neodymium iron boron permanent magnet array; the magnets are arranged in a ring on the interface end face of the magnetic quick-connect fitting 10, providing an axial adsorption force of ≥200N; the magnets are embedded in a 304 stainless steel collar, the surface of which is nickel-plated, and the nickel-plating thickness is ≥25μm; multiple groups of spring steel claws 10.1 are provided at the interface of one connection end of the magnetic quick-connect fitting 10, and a conical surface structure 10.2 is provided at the interface of the other connection end; the spring steel claws 10.1 are engaged with the conical surface structure 10.2; an EPDM trapezoidal sealing ring and a PTFE compression ring are provided at the connection of the two connection ends of the magnetic quick-connect fitting 10.

[0077] In this specific embodiment, the auxiliary mechanical buckle includes 4 groups of spring steel claws 10.1 made of SUS304 material, with a thickness of 1.5mm. The dynamic bite force of a single buckle of the locking mechanism is 200N, the static holding force is 250N, and the total locking force is ≥1000N; the maximum working pressure: 0.2MPa, the applicable temperature: -20°C to 80°C, the plugging and unplugging life: ≥5000 cycles. The Shore hardness range of the EPDM trapezoidal sealing ring is 70±5, and the thickness of the PTFE compression ring is 2mm.

[0078] It should be further noted that the quick-connect and quick-disconnect assembly C is applicable to various aeration scenarios; it has strong anti-vibration performance and can withstand mechanical vibrations below 10Hz. The magnetic attraction force is used to achieve quick disassembly and positioning, and the mechanical buckle further increases the stability and provides sufficient pressure. The joint includes a metal hose 11 with a length of 300mm, which solves problems such as misalignment of the jack, axial expansion joint, and coaxiality during the docking of the air pipe. At the same time, the metal hose 11 has a certain ductility and can eliminate the height error during the installation process.

[0079] It should be further noted that the use of the quick-connect and quick-disconnect assembly C simplifies the disassembly and assembly process, without complex operations such as screw fixation and buckle alignment; it greatly improves the equipment assembly / disassembly efficiency. The design realizes quick positioning and precise docking through magnetic adsorption, and then is further tightened through physical buckles, meets the requirements of pipeline pressure, reduces the disassembly and assembly time and the required tools, and improves the maintenance efficiency.

[0080] High-strength neodymium magnets or composite magnetic materials are used to maintain a long-term stable adsorption force and support multiple pluggings and unplugging at the same time. The metal hose can still effectively dock when there is a certain lateral or axial deviation in ensuring the system positioning.

[0081] It should be noted that when there are periodic changes in the sewage volume and quality, or when the water volume in the early stage of the sewage treatment facility is insufficient, 16 tubular aerators 1 can be installed in the aeration unit. When the water quality and volume reach or exceed the designed water quality and volume, the number of tubular aerators 1 can be increased by 1 to 28. When the water quality and volume are low, some of the tubular aerators 1 can be removed and blocked with air plugs 3 to extend the service life of the tubular aerators 1. Therefore, this system is suitable for new municipal sewage projects with insufficient initial water volume or industrial sewage projects with obvious periodic changes in water quality and volume, and the system can be adjusted flexibly.

[0082] In comparison, the modular design adopted in the present invention demonstrates outstanding flexibility advantages. Each functional module has the dual characteristics of independent control and coordinated operation, and the system configuration can be dynamically optimized through rapid reorganization or removal. Specifically, in scenarios where it is necessary to improve the aeration efficiency, dedicated functional modules can be immediately added to enhance the treatment capacity; while when the treatment demand decreases, resource intensive utilization can be achieved through module disassembly. This design paradigm breaks through the physical limitations of traditional systems and constructs an adaptive adjustment mechanism, enabling the aeration system to maintain a stable and efficient operating state under complex and variable working conditions.

[0083] It should be noted that the intelligent control component D includes an electric valve 12 and a pressure sensor 13; the electric valve 12 is arranged on the connecting pipeline between the aeration main pipe E and the quick installation and disassembly component C; the electric valve 12 is used to adjust the air supply volume of the aeration component A; the pressure sensor 13 is arranged on the connecting pipeline between the electric valve 12 and the quick installation and disassembly component C; the pressure sensor 13 is used to collect the air pressure data of the component pipeline and then transmit it to the control system.

[0084] It should be further noted that the pressure sensor 13 can display the pipeline pressure. When the pressure is abnormal, it can quickly display on the central control system, without relying on the traditional manual inspection and regular maintenance mode to discover problems. Faults such as damage and blockage of the aerator can be discovered in a timely manner and repaired in a timely manner to prevent irreversible damage to the equipment. At the same time, it also ensures the continuity of production and the qualification rate of the produced water.

[0085] In general, dissolved oxygen meters are set in different areas of the aeration tank of the sewage treatment system. The data of the dissolved oxygen meters are connected to this system for automatic control. When the dissolved oxygen needs to be adjusted in a local area, the opening degree of the electric valve 12 is adjusted to adjust the aeration volume to meet the process dissolved oxygen requirements.

[0086] The blower of this aeration module adopts a magnetic levitation centrifugal blower with variable frequency adjustment. When the overall air volume of the system needs to be adjusted, the air volume can be adjusted in the range of 50%-100% through variable frequency, effectively saving energy consumption.

[0087] It should be further noted that a pressure sensor 13 and an electric valve 12 are integrated in each module to monitor the operating status of the aeration system in real time. Through data analysis and intelligent algorithms, the aeration parameters are automatically adjusted to ensure that the system operates in the best state. At the same time, an early warning system is set up to detect and handle potential faults in a timely manner.

[0088] Through the above design and implementation methods, the modular aeration unit not only has significant technical advantages, but also shows high flexibility and adaptability in practical applications, meeting the composite requirements of modern sewage treatment for high efficiency, energy conservation and operational convenience.

[0089] It should be noted that for the situation of large fluctuations in water quality and water volume, this aeration system has various adjustment methods.

[0090] 1. Adjust the number of in-pipe aerators 1.

[0091] 2. Adjust the opening degree of the electric valve 12.

[0092] 3. Adjust the blower frequency.

[0093] Flexible adjustment is carried out through the pressure sensor 13 and combined with the detection data of the dissolved oxygen meter. While meeting the requirements of treatment up to standard, energy consumption is also minimized.

[0094] At the same time, when the sewage volume gradually increases, aeration equipment can be added in batches, reducing investment and losses and increasing the service life of the aerators.

[0095] When the water quality changes, the number of aerators and the aeration volume can be flexibly adjusted.

[0096] The control method of the modular lifting type sewage intelligent aeration system is utilized, as Figure 6 shown, which includes a data acquisition module, a feedforward prediction module, a feedback correction module, and a dynamic optimization module, where:

[0097] The data acquisition module collects the influent flow rate through a flow meter and collects the dissolved oxygen data of the water tank through a dissolved oxygen meter; the dissolved oxygen data collects multiple sections of values corresponding to the water tank scale or the grouping situation of the modular aeration units; in this embodiment, a sewage treatment scale of 10,000 tons per day and a single group are used for illustration. The air pressure data of a single modular aeration unit is collected through the intelligent control component D; the influent COD data and the effluent COD data are collected through the sewage plant COD on-line analyzer; after the data is collected, a control program is set in the control system.

[0098] The feedforward prediction module predicts the oxygen demand based on the real-time change rate of the influent flow rate;

[0099] The feedback correction module dynamically adjusts the opening degree of each electric valve 12 according to the dissolved oxygen data according to the PID control algorithm, and then automatically adjusts the air volume of the blower;

[0100] The dynamic optimization module is used for online efficiency calculation and parameter self-tuning; it predicts the oxygen transfer coefficient and saturated dissolved oxygen concentration through a machine learning model to adapt to water quality fluctuations; and dynamically adjusts the valve opening through a valve dynamic distribution algorithm to balance the numerical values of air pressure data and dissolved oxygen data.

[0101] It should be noted that the dissolved oxygen data includes the dissolved oxygen data of the front section, middle section, and rear section of the water tank;

[0102] The prediction algorithm for oxygen demand is expressed as follows:

[0103] R o = K La ×(C * - C) × Q1

[0104] Where: R o is used to represent the oxygen demand; K La is used to represent the oxygen transfer coefficient, which is related to the aeration volume and sewage characteristics; C * is used to represent the saturated dissolved oxygen concentration; C is used to represent the current dissolved oxygen concentration, taking the weighted average of the dissolved oxygen data of the front section, middle section, and rear section; Q1 is used to represent the influent flow rate;

[0105] In the feedback correction module, the target value of the dissolved oxygen data in the front section is set to 1.5 mg / L, the target value of the dissolved oxygen data in the rear section is set to 2.0 mg / L, and the target value of the dissolved oxygen data in the middle section is limited to be less than or equal to 0.5 mg / L;

[0106] The PID control algorithm adjusts the aeration volume through proportional, integral, and differential terms, and is expressed as follows:

[0107]

[0108] Where: u(t) is used to represent the blower frequency of the control output; e(t) is used to represent the error; K p is used to represent the proportional gain coefficient; K i is used to represent the integral gain coefficient; K d is used to represent the differential gain coefficient;

[0109] The error is the difference between the target value and the actual value of the set dissolved oxygen data, and is expressed as follows:

[0110] e(t) = DO set - DO1

[0111] Where: DO set is used to represent the target value of the dissolved oxygen data; DO1 is used to represent the dissolved oxygen data of the front section;

[0112] The valve dynamic allocation algorithm is expressed by the following formula:

[0113]

[0114] Where: V i is used to represent the valve opening; Q 2,req is used to represent the total required aeration volume; n is used to represent the number of branch pipes; ΔV i is used to represent the dynamic correction term; P set is used to represent the set pressure; P real is used to represent the actual pressure;

[0115] The pressure compensation and valve linkage adjustment algorithm when the valve dynamic allocation algorithm dynamically adjusts the valve opening are expressed by the following formula:

[0116] K v = f(Q2, P)

[0117] Where: K v represents the valve linkage adjustment coefficient, and satisfies K v = 0.3; f(Q2, P) is used to represent the non-linear fusion pressure compensation and load regulation, which is used to coordinate the actions of multi-branch pipes valves and suppress the gas volume fluctuation.

[0118] It should be noted that by adopting this control method, in the scenario of sudden change of influent load, the gas volume fluctuation can be reduced by more than 30%.

[0119] It should be further noted that this system calculates and adjusts the valve opening through the pressure value. When the pressure value exceeds the set maximum value, it prompts the warning of aerator blockage and manual maintenance is required. When the pressure value is lower than the set minimum value, it prompts the warning of aerator detachment and manual maintenance is required.

[0120] It should be further noted that this system anticipates the air volume change through the feedforward prediction module, and the response speed is increased by 40%. It can respond to the influent shock load in advance; through the adaptive PID parameter + dynamic weight fusion of the feedback correction module, the control accuracy reaches ±0.15 mg / L, and at the same time, the response speed and stability are balanced; through the dynamic optimization module, the parameters are automatically adjusted based on the historical performance, and the energy efficiency is continuously improved. At the same time, by dynamically adjusting the valves and blowers, the power consumption of the blower is reduced by 10% - 35%; the carbon source dosage is reduced by 10% - 15%, and the denitrification interference is reduced due to the stable DO. The DO fluctuation range is controlled within ±0.5 mg / L, and the ammonia nitrogen compliance rate is increased to more than 95%. The present invention adopts an advanced multi-dimensional monitoring architecture, equipped with a multi-parameter monitoring module, to achieve all-round perception and accurate acquisition of key indicators, realize intelligent control, and save energy consumption.

[0121] In the foregoing detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than those expressly recited in each claim. On the contrary, as reflected in the appended claims, the present invention lies in less than the full scope of features of the single disclosed embodiment. Accordingly, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the present invention.

[0122] The above-described disclosed embodiments are described so as to enable any person skilled in the art to make or use the present invention. For those skilled in the art, various modifications to these embodiments will be readily apparent, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the present disclosure. Thus, the present disclosure is not limited to the embodiments given herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0123] The foregoing description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but those of ordinary skill in the art should recognize that each embodiment may be further combined and arranged. Accordingly, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, this term is inclusive in a manner similar to the term "including" as interpreted when employed as a transitional word in a claim. Further, any use of the term "or" in the claims or specification is to mean "non-exclusive or".

[0124] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A modular lifting type intelligent sewage aeration system, characterized in that: It includes multiple modular aeration units, and each of the modular aeration units includes an aeration component (A), a lifting component (B), a quick-installation and quick-disassembly component (C), and an intelligent control component (D), where: The aeration component (A) is used to provide dissolved oxygen that meets the process requirements for the sewage; the lifting component (B) is installed on one side of the aeration component (A); the lifting component (B) is used to fix the modular aeration unit to the tank body and is used to cooperate with a lifting device to lift the modular aeration unit out of the tank body during equipment maintenance; the quick-installation and quick-disassembly component (C) is installed on the side of the aeration component (A) away from the lifting component (B) and is used to connect and disconnect the aeration component (A) from the main aeration pipe (E); the intelligent control component (D) is arranged at the connection between the quick-installation and quick-disassembly component (C) and the main aeration pipe (E), and the intelligent control component (D) is electrically signal-coupled with the control system; the intelligent control component (D) is used to collect the air pressure data of the component pipeline and then transmit it to the control system, and is used to receive the control signal of the control system and adjust the air supply volume of the aeration component (A).

2. The modular lifting type intelligent sewage aeration system according to claim 1, wherein: The aeration component (A) includes a tube aerator (1), a distribution pipe (2), a gas plug (3), a support device (4), and an aeration branch pipe (5), where: the tube aerator (1) is communicated with the distribution pipe (2) and is evenly distributed on the distribution pipe (2), and the tube aerator (1) is used to convert the air of the blower into tiny bubbles, thereby providing dissolved oxygen that meets the process requirements for the sewage; the distribution pipe (2) is a frame structure and is used to evenly distribute the air volume of the aeration branch pipe (5) to each of the tube aerators (1); the gas plug (3) is detachably installed at the position on the distribution pipe (2) where the tube aerator (1) does not need to be installed for plugging; one side of the aeration branch pipe (5) is communicated with the distribution pipe (2), and the other side is communicated with the main aeration pipe (E); the support device (4) is fixedly arranged on both sides of the aeration component (A) and is used to improve the stability of the modular aeration unit; a lifting ring (15) for auxiliary lifting is arranged at the top of the aeration branch pipe (5).

3. The modular lift type intelligent sewage aeration system according to claim 2, wherein: The diameter of the tube aerator (1) is 67 mm, the length is 1 m, the air ventilation volume is 4 - 6 m3 / h·piece, and the diaphragm is made of EPDM material; every two tube aerators (1) are symmetrically installed on the distribution pipe (2) through a connector; the connector is a stainless steel screw M10, the length is not less than 210 mm, and it is equipped with a 45 mm EPDM sealing joint; the distribution pipe (2) is made of 304 stainless steel, its cross-section is a square with a side length of 80 mm, and the thickness is 4 mm; each single distribution pipe (2) is equipped with 16 - 28 tube aerators (1).

4. The modular lifting type intelligent sewage aeration system according to claim 1, characterized in that: The lifting assembly (B) includes a guide rod (6), a lifting rod (7), a special lifting boom (8), a lifting ring (9), and a fixing ring (14). Among them: The guide rod (6) is fixedly connected to the pool wall (F) and is used to position the modular aeration unit; The bottom end of the lifting rod (7) is fixedly connected to the aeration assembly (A), and the lifting ring (9) is provided at the top; The lifting ring (9) is used to connect the supporting special lifting boom (8) and cooperate with a lifting device to lift the modular aeration unit out of the pool; The special lifting boom (8) is used to balance the force of the lifting assembly (B); A plurality of fixing rings (14) are provided in the middle of the lifting rod (7); The fixing ring (14) adopts an open structure, one end of which is fixed to the lifting rod (7), and the other end is slidably sleeved on the guide rod (6).

5. The modular lifting type intelligent sewage aeration system according to claim 4, characterized in that: The special lifting boom (8) includes a steel wire rope (8.1), a balance rod (8.2), a hook (8.3), and a lug (8.4); Both ends of the steel wire rope (8.1) are fixedly connected to the balance rod (8.2) near both ends by full welding; Multiple groups of lugs (8.4) are provided below the balance rod (8.2); The hook (8.3) is provided on the lug (8.4).

6. The modular lifting type intelligent sewage aeration system according to claim 1, characterized in that: The quick installation and disassembly assembly (C) includes a magnetic quick installation joint (10) and a metal hose (11); The lower end of the metal hose (11) is communicated with the upper end of the aeration branch pipe (5), and the upper end of the metal hose (11) is communicated with the lower end of the elbow (16) connecting the aeration main pipe (E); The metal hose (11) is used to eliminate axial and lateral installation errors; The upper end of the elbow (16) and the connection end of the aeration main pipe (E) are respectively installed with two connection ends of the magnetic quick installation joint (10); The magnetic quick installation joint (10) is used to separate and install the aeration assembly (A) and the aeration main pipe (E).

7. The modular lifting type intelligent sewage aeration system according to claim 6, characterized in that: The magnet of the magnetic quick installation joint (10) adopts an N45 grade neodymium iron boron permanent magnet array; The magnets are arranged in a ring on the interface end face of the magnetic quick installation joint (10); The magnet is embedded in a 304 stainless steel collar, its surface is nickel-plated, and the nickel-plating thickness ≥ 25μm; Multiple groups of spring steel claws (10.1) are provided at the interface of one connection end of the magnetic quick installation joint (10), and a conical surface structure (10.2) is provided at the interface of the other connection end; The spring steel claws (10.1) are engaged with the conical surface structure (10.2); An EPDM trapezoidal sealing ring and a PTFE compression ring are provided at the connection of the two connection ends of the magnetic quick installation joint (10).

8. The modular lifting type intelligent sewage aeration system according to claim 1, characterized in that: The intelligent control component (D) includes an electric valve (12) and a pressure sensor (13); the electric valve (12) is arranged on the connecting pipeline between the aeration main pipe (E) and the quick-installation and quick-disassembly component (C); the electric valve (12) is used to adjust the air supply volume of the aeration component (A); the pressure sensor (13) is arranged on the connecting pipeline between the electric valve (12) and the quick-installation and quick-disassembly component (C); the pressure sensor (13) is used to collect the air pressure data of the component pipeline and then transmit it to the control system.

9. A control method using the modular lifting type intelligent sewage aeration system according to any one of claims 1 to 8, characterized in that: It includes a data acquisition module, a feedforward prediction module, a feedback correction module, and a dynamic optimization module, where: The data acquisition module collects the influent flow rate through a flow meter and collects the dissolved oxygen data of the water tank through a dissolved oxygen meter; the dissolved oxygen data collects multiple sections of numerical values according to the water tank scale or the grouping situation of the modular aeration units; the air pressure data of a single modular aeration unit is collected through the intelligent control component (D); the COD influent data and COD effluent data are collected through an on-line COD analyzer in the sewage treatment plant; The feedforward prediction module predicts the oxygen demand based on the real-time change rate of the influent flow rate; The feedback correction module dynamically adjusts the opening degree of each electric valve (12) according to the dissolved oxygen data according to the PID control algorithm, and then automatically adjusts the air volume of the fan; The dynamic optimization module predicts the oxygen transfer coefficient and saturated dissolved oxygen concentration through a machine learning model to adapt to water quality fluctuations; and dynamically adjusts the valve opening degree through a valve dynamic distribution algorithm to balance the numerical values of the air pressure data and the dissolved oxygen data.

10. The control method according to claim 9, wherein: The dissolved oxygen data includes the front-section dissolved oxygen data, middle-section dissolved oxygen data, and rear-section dissolved oxygen data of the water tank; The prediction algorithm of the oxygen demand is expressed by the following formula: R o = K La × (C * - C) × Q1 Where: R o is used to represent the oxygen demand; K La is used to represent the oxygen transfer coefficient, which is related to the aeration volume and sewage characteristics; C * is used to represent the saturated dissolved oxygen concentration; C is used to represent the current dissolved oxygen concentration, which is the weighted average of the dissolved oxygen data in the previous section, the dissolved oxygen data in the middle section, and the dissolved oxygen data in the latter section; Q1 is used to represent the influent flow rate; In the feedback correction module, the target value of the front-section dissolved oxygen data is set to 1.5 mg / L, the target value of the rear-section dissolved oxygen data is set to 2.0 mg / L, and the target value of the middle-section dissolved oxygen data is limited to be less than or equal to 0.5 mg / L; The PID control algorithm adjusts the aeration volume through proportional, integral, and differential terms and is expressed by the following formula: Among them: u(t) is used to represent the frequency of the blower of the control output; e(t) is used to represent the error; K p is used to represent the proportional gain coefficient; K i is used to represent the integral gain coefficient; K d is used to represent the differential gain coefficient; The error is the difference between the target value and the actual value of the set dissolved oxygen data and is expressed by the following formula: e(t) = DO set -DO1 where: DO set is used to represent the target value of the dissolved oxygen data; DO1 is used to represent the dissolved oxygen data of the previous stage; The valve dynamic distribution algorithm is expressed by the following formula: Where: V i is used to represent the valve opening; Q 2,req is used to represent the total required aeration volume; n is used to represent the number of branch pipes; ΔV i is used to represent the dynamic correction term; P set is used to represent the set pressure; P real is used to represent the actual pressure; The pressure compensation and valve linkage adjustment algorithm when the valve dynamic distribution algorithm dynamically adjusts the valve opening degree is expressed by the following formula: K v = f(Q2, P) Where: K v represents the valve linkage adjustment coefficient, and satisfies K v = 0.3; f(Q2, P) is used to characterize the non-linear fusion pressure compensation and load regulation, and is used to coordinate the actions of multi-branch pipes valves to suppress gas volume fluctuations.

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