Modular sewage purification treatment device and purification treatment method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a modular sewage purification treatment device and a purification treatment method.The modular sewage purification treatment device comprises a plurality of modular box bodies with standardized sizes, and each modular box body at least comprises a pretreatment module, a biochemical treatment module, an advanced treatment module and a control module; a lifting lug structure is arranged at the top of each modular box body, adjustable supporting legs are arranged at the bottom of each modular box body, and a polyurea anticorrosive coating and a T-shaped mounting guide rail arranged in the length direction are arranged on the inner side of each box body. The box bodies can be flexibly increased or decreased to adjust the treatment scale, and the problems of large size, difficult deployment and fixed treatment capacity of the traditional device are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a modular wastewater purification device and its purification method. Background Technology

[0002] In the field of wastewater treatment, with the continuous improvement of environmental protection requirements and the diversification of application scenarios (such as urban domestic sewage, industrial park wastewater, emergency rescue sewage treatment, etc.), higher requirements have been placed on the adaptability, installation efficiency and maintenance convenience of wastewater treatment equipment.

[0003] Traditional wastewater treatment plants have a fixed treatment capacity during the design phase. When wastewater discharge increases or decreases, the entire equipment must be replaced or a new treatment system must be built. This makes it impossible to flexibly adjust the structure to adapt the treatment capacity in stages, resulting in resource waste or insufficient treatment capacity. Moreover, the integrated devices are bulky and heavy, placing extremely high demands on transportation routes, hoisting equipment, and on-site installation space. Especially in site-constrained or emergency treatment scenarios, rapid deployment is difficult, and the long installation cycle affects the timeliness of wastewater treatment. In particular, the internal components of integrated devices (such as guide plates, packing, and filter components) are mostly fixed welded or integrated designs. When components are damaged or the process needs to be optimized, the entire device must be disassembled, resulting in complex maintenance procedures, long downtime, and difficulty in upgrading or replacing the core treatment unit individually. In addition, different water qualities (such as high COD wastewater and low turbidity wastewater) have different requirements for treatment flow patterns and reaction residence times. The internal guide structure and reaction zone layout of traditional devices are fixed, making it impossible to adjust the structural parameters of the core treatment unit according to changes in water quality, resulting in insufficient versatility of the treatment process. Therefore, we propose a modular wastewater purification treatment device and its purification treatment method. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a modular wastewater purification and treatment device, comprising several modular boxes of standardized dimensions. Each modular box includes at least a pretreatment module, a biochemical treatment module, an advanced treatment module, and a control module. Each modular enclosure is equipped with a lifting lug structure on the top and adjustable support feet on the bottom. The inner side of the enclosure is coated with polyurea anti-corrosion coating and T-shaped mounting rails arranged along the length. Standardized flange-type pipe interfaces and waterproof aviation plugs are fixedly assembled at corresponding positions on the side walls. The pipe interfaces have built-in sealing gaskets and anti-backflow valves, and the aviation plugs are equipped with anti-misinsertion positioning structures.

[0005] In some embodiments, the biochemical treatment module is provided with an upper guide plate and a lower guide plate. The upper guide plate is a segmented inclined structure, and the lower guide plate is a horizontal structure. The two are interlocked to form an "S"-shaped water flow channel. The lower guide plate has evenly distributed guide holes with gradually changing diameters along the water flow direction. Each modular box can be quickly assembled through T-shaped mounting rails and standardized interfaces. The number of biochemical treatment modules can be flexibly increased or decreased, and different guide hole specifications can be replaced. The biochemical treatment module has a detachable flow guide baffle at the "S"-shaped channel bend on its side wall. The detachable flow guide baffle is connected to the side wall of the box via a slot.

[0006] In some embodiments, the modular enclosure is integrally welded from Q235 steel structural components, and the thickness of the anti-corrosion coating on the inner side of the enclosure is 1.5-2.0mm. The upper and lower guide plates of the biochemical treatment module are made of stainless steel, with a parallel spacing of 300-500mm. The diameter of the guide holes gradually changes from 15mm to 25mm along the water flow direction, and the center-to-center spacing of the holes is 50-80mm. The segmented upper guide vane has an inclination angle of 15-20° for each segment, and a gap of 10-15mm is reserved at the connection between adjacent segments. Each modular enclosure has a consistent structure and universal interfaces. Adjacent enclosures are connected via T-shaped mounting rails and secured with quick-release bolts, with a connection gap of no more than 2mm.

[0007] In some embodiments, the control module has a built-in PLC controller and a data acquisition module, and establishes an electrical signal connection with each functional module through an aviation connector; The biochemical treatment module contains elastic packing material between the upper and lower guide plates, and the elastic packing frame can be raised and lowered along the slide rails on the inner wall of the box. An aeration assembly is installed below the lower guide plate and is connected to an air pump through an independent pipeline. The air outlet of the aeration assembly faces directly below the guide holes and is arranged in a one-to-one correspondence with the guide holes.

[0008] In some embodiments, the pretreatment module is provided with an inclined grid assembly with an inclination angle of 30-45°. An arc-shaped water collection tank is provided below the grid, and the bottom of the water collection tank is connected to the pipe interface to form a "grid interception-arc-shaped flow guide" pretreatment structure. The inner wall of the arc-shaped water collection tank is provided with spiral flow guide patterns, and the spiral flow guide patterns are swirling in the same direction as the water flow. A drain outlet is provided at the bottom of the tank, and a removable sealing plug is provided at the drain outlet.

[0009] In some embodiments, the deep processing module is provided with a partition plate to divide the interior of the box into a filtration zone and a buffer zone. The buffer zone and the filtration zone are provided with strip-shaped flow guide slits with a width of 10-20mm. The filtration zone is provided with upper and lower ultrafiltration membrane assemblies, and a flow divider is provided between the two assemblies. The flow divider has evenly distributed flow divider holes with a diameter of 8-12mm.

[0010] In some embodiments, the biochemical treatment module is provided with a sludge collection trough at the bottom, which is arranged along the length of the box and located on one side of the aeration component. The bottom of the sludge collection trough is connected to the sewage pipe interface, which has a built-in one-way valve. The upper and lower guide plates are provided with sealing strips at the connection between them and the side wall of the box, and the thickness of the sealing strips is 3-5mm.

[0011] In some embodiments, each modular enclosure has an observation window on its side wall, with each observation window corresponding to a processing area. A waterproof sealing cover is provided on the outside of the window, and the sealing cover is fixed to the enclosure by bolts. A transparent anti-corrosion tempered glass with a thickness of 8-10mm is provided on the inside of the observation window.

[0012] A modular wastewater purification and treatment method includes the following steps: S1. Module prefabrication: Q235 steel structure box body is mass-welded in the factory, sprayed with 1.5-2.0mm thick polyurea coating, and assembled with T-shaped mounting rails, lifting lug structure and adjustable support feet; The pretreatment module is equipped with an inclined grid assembly, an arc-shaped water collection tank with spiral flow guide patterns, and a sealing plug. The biochemical treatment module is equipped with a stainless steel segmented upper flow guide plate, a horizontal lower flow guide plate, an elastic packing frame, an aeration assembly, and a detachable flow guide baffle. The deep treatment module is equipped with partition plates, strip flow guide slots, a double-layer ultrafiltration membrane assembly, and a flow divider. After assembling standardized interfaces, observation windows, and sealing caps, and passing pressure, sealing, and electrical signal tests, the equipment is transported to the site. S2. On-site assembly: Determine the number of boxes and the specifications of the biochemical treatment modules according to the processing requirements. Use lifting lugs to position the boxes, adjust the adjustable support feet to level them, align the T-shaped installation rails of adjacent boxes and push them in to lock them, ensuring that the docking gap is no more than 2mm. Connect the pipe interface and conduct a pressure test of 0.8MPa for more than 30 minutes. Connect the circuit through the aviation plug, adjust the air outlet of the aeration component to accurately correspond with the guide hole, complete the PLC parameter preset and debugging, and install the detachable guide baffle to ensure a tight fit with the slot. S3, Wastewater Purification: Start all modules and adjust the influent flow rate to 5-50m³ / h. 3 / h, wastewater is intercepted by the inclined bar screen assembly of the pretreatment module, flows spirally along the arc-shaped water collection trough with spiral guide pattern, and is guided to the sedimentation tank to stand for 1.5-2.0 hours. The sewage outlet of the sludge collection trough is opened periodically to clean the impurities. After entering the biochemical treatment module, the water flows along the "S"-shaped channel formed by the segmented upper and lower guide plates. It is guided by the detachable guide baffle at the turning point. The water flow is divided from top to bottom along the guide holes with gradually changing diameters and comes into contact with the gas released by the corresponding aeration components below. The packing frame is lowered to the preset height. After the sewage completes multiple turns and flows in the "S"-shaped channel, it comes into full contact with the surface of the packing and stays for 4-6 hours. After biochemical treatment, wastewater flows into the buffer zone of the advanced treatment module, then flows uniformly into the filtration zone through the strip guide slits. It is then evenly distributed to the upper and lower ultrafiltration membrane modules through the distribution holes of the flow divider plate, controlling the membrane flux to 10-15 L / (m²). 2 • h) Filter pressure 0.1-0.2MPa to complete the filtration process. Periodically check the processing status of each module through the observation window.

[0013] S4. Flexible adaptation: When the scale of treatment or water quality changes, shut down the corresponding module, disassemble the quick-release bolts and interfaces, add or remove the tank or replace the biological treatment module with different gradual aperture specifications, reassemble and debug, and ensure that the aeration components and the guide holes are precisely aligned. When the COD of the influent is higher than 500 mg / L, replace the biological treatment module with one whose flow guide hole has a gradual range of 12-20 mm, remove some of the flow guide baffles to adjust the length of the "S" shaped channel, extend the residence time to 6-8 hours, regularly clean the sediment in the sludge collection tank of the biological treatment module, and replace the sealing strip and the observation window sealing cover.

[0014] In some embodiments, during the steps, the control module feeds back signals through the data acquisition module to adjust the lifting height of the packing frame of the biochemical treatment module so that the packing is completely submerged in the sewage, and simultaneously adjusts the aeration volume so that the aeration airflow is consistent with the direction of the water flow after the diversion through the guide hole. The water level difference between the filtration zone and the buffer zone of the deep treatment module is controlled at 50-100mm. The ultrafiltration membrane module is backwashed every 2 hours, with a backwash time of 5-10 minutes and a pressure of 0.15MPa. The backwash wastewater re-enters the treatment process through the return channel of the pretreatment module. During the process of cleaning the arc-shaped water collection tank and mud collection tank, the corresponding module is shut down and the one-way valve of the sewage pipe is closed. After cleaning is completed, the sealing plug and one-way valve are reset.

[0015] This invention has at least the following beneficial effects: This modular wastewater purification treatment device and method is based on modular design. It achieves factory prefabrication and rapid on-site assembly through standardized boxes. The treatment scale can be adjusted by flexibly increasing or decreasing the number of boxes, effectively solving the pain points of traditional devices such as large size, difficult deployment and fixed treatment capacity. In addition, the internal segmented guide plate, detachable baffle plate, lifting elastic packing frame, vertical flow-limiting strip guide slit and horizontal diversion plate, horizontal arc-shaped water collection trough and spiral guide pattern can flexibly adapt to different water quality requirements, optimize the treatment channel and process adaptability, and all detachable components adopt a standardized quick-release design, which is convenient for individual replacement and upgrade, reduces maintenance costs, and the modules have strong synergy and reliable sealing, fully adapting to diverse sewage treatment scenarios and completely solving the shortcomings of traditional devices that cannot adapt to modular development. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the modular box of the present invention; Figure 2 This is a schematic diagram of the biochemical treatment module structure of the present invention; Figure 3 This is a schematic diagram of the preprocessing module structure of the present invention; Figure 4 This is a schematic diagram of the deep processing module structure of the present invention.

[0017] In the diagram: 1-Modular housing; 11-Lifting lug structure; 12-Adjustable support feet; 13-T-type mounting rail; 2-Modular housing; 21-Inclined grid assembly; 22-Water collection trough; 23-Spiral flow guide pattern; 3-Biochemical treatment module; 31-Upper guide plate; 32-Lower guide plate; 33-Flow guide hole; 34-Removable flow guide baffle; 35-Sludge collection trough; 36-Aeration assembly; 37-Elastic packing material; 4-Deep treatment module; 41-Divider plate; 42-Filtration zone; 43-Buffer zone; 44-Strip flow guide slit; 45-Ultrafiltration membrane assembly; 46-Flow divider plate; 5-Control module. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-4 The present invention provides a technical solution: a modular sewage purification and treatment device, comprising several modular boxes 1 of standardized size, wherein each modular box 1 includes at least a pretreatment module 2, a biochemical treatment module 3, a deep treatment module 4, and a control module 5; Each modular housing 1 is equipped with a lifting lug structure 11 on the top and adjustable support feet 12 on the bottom. The inner side of the housing is coated with polyurea anti-corrosion coating and T-shaped installation rails 13 arranged along the length direction. Standardized flange-type pipe interfaces and waterproof aviation plugs are fixedly assembled at corresponding positions on the side walls. The pipe interfaces have built-in sealing gaskets and anti-backflow valves. The aviation plugs are equipped with anti-misinsertion positioning structures. The lifting lug structure 11 adopts the existing general steel structure hoisting design and can be adapted to the lifting tool connection of conventional cranes on the market. The adjustable support feet 12 adopt the existing spiral lifting support structure, which can achieve 0-100mm height fine adjustment to meet the leveling needs of uneven ground on site. The T-shaped installation rails 13 adopt the existing industrial general T-slot structure and, together with the standard slide, achieve precise docking and locking of each module. The standardized flange-type pipe interface matches the existing municipal water supply and drainage general flange specifications. The waterproof aviation plug adopts the existing IP68-level industrial aviation plug to ensure the stability of electrical signal transmission in outdoor humid environments.

[0020] The biochemical treatment module 3 is equipped with an upper guide plate 31 and a lower guide plate 32. The upper guide plate 31 is a segmented inclined structure, and the lower guide plate 32 is a horizontal structure. The two are interlocked to form an "S"-shaped water flow channel. This structure is different from the traditional integrated straight guide structure. By interlocking the segmented inclined and horizontal structures, the flow path of sewage in the module can be extended, and the contact efficiency between sewage and packing and aeration airflow can be improved. The lower guide plate 32 has evenly distributed guide holes 33. The guide holes 33 are set with a gradually changing diameter along the water flow direction. By utilizing the characteristic that the flow velocity gradually decreases during the water flow, the gradually changing diameter can avoid local water flow congestion or poor guidance. Each modular box 1 can be quickly assembled through T-shaped installation guide rails 13 and standardized interfaces. The number of biochemical treatment modules 3 can be flexibly increased or decreased and different guide hole 33 specifications can be replaced to adapt to the treatment needs of different sewage discharge and water quality. There is no need to replace the entire equipment, which solves the problem of fixed treatment scale of traditional devices. The biochemical treatment module 3 has a detachable flow guide baffle 34 at the turn of the "S"-shaped channel on its side wall. The detachable flow guide baffle 34 is connected to the side wall of the box through a slot. The slot adopts the existing industrial common slot structure. The baffle can be directly inserted and removed without the need for special tools. This makes it easy to adjust the actual length of the "S"-shaped channel on site according to the processing requirements, and also facilitates the cleaning and maintenance of the module.

[0021] The modular box 1 is integrally welded from Q235 steel structural components. Utilizing the existing mature welding technology of Q235 steel, the structural strength and sealing of the box are guaranteed, meeting the pressure-bearing and corrosion-resistant environmental requirements of the sewage treatment device. The thickness of the anti-corrosion coating on the inner side of the box is 1.5-2.0mm, which is in line with the existing anti-corrosion coating standards for steel structure equipment in sewage treatment. This thickness can effectively resist the erosion of corrosive media in sewage and extend the service life of the box. The upper and lower guide plates 32 of the biochemical treatment module 3 are made of stainless steel, using existing 304 stainless steel plates, which have good corrosion resistance and structural strength, and are suitable for the humid environment and microbial corrosion inside the biochemical treatment module. The parallel spacing is 300-500mm. This spacing has been verified by existing sewage treatment guide structure design experience. It can not only ensure smooth water flow, but also reserve enough installation and working space for elastic packing and aeration components. The diameter of the guide holes 33 gradually changes from 15mm to 25mm along the water flow direction, and the center spacing of the holes is 50-80mm. The combination of the gradually changing hole diameter and the hole spacing can achieve uniform sewage distribution and avoid excessive flow in a single hole. The segmented upper guide plate 31 has an inclination angle of 15-20° for each segment. This inclination angle is based on existing fluid dynamics guide design specifications. It can ensure that the water flows smoothly along the guide plate, and avoid the water flow velocity being too fast due to the excessive angle. A gap of 10-15mm is reserved at the connection between two adjacent segments to provide space for the installation of the detachable guide baffle 34, and at the same time to avoid water flow jamming at the joint of the guide plate. Each modular box 1 has the same structure and universal interface. After adjacent boxes are connected by T-shaped mounting rails 13, they are locked and fixed with quick-release bolts. The quick-release bolts are the existing national standard quick-release locking bolts, which can quickly complete the assembly and disassembly of the modules. The connection gap is no more than 2mm to ensure the sealing of the modules after connection and avoid sewage leakage.

[0022] The control module 5 has a built-in PLC controller and a data acquisition module. The PLC controller is an existing Siemens S7-200 series small PLC controller, and the data acquisition module is an existing conventional water quality and operating condition data acquisition sensor. Both are control and acquisition devices that are mature in industrial field applications. The control module establishes an electrical signal connection with each functional module through an aviation connector to realize centralized control and real-time monitoring of the operating conditions of each module. The biochemical treatment module 3 contains an elastic packing material 37 between the upper guide plate 31 and the lower guide plate 32. The elastic packing material 37 is a conventional three-dimensional elastic packing material for sewage treatment, which has the characteristics of large specific surface area and good microbial adhesion. The packing material frame can be raised and lowered along the slide rail on the inner wall of the box. The slide rail adopts the existing industrial general linear slide rail. With the existing small electric lifting mechanism, the submersion height of the packing material can be automatically adjusted through the control module 5 to adapt to the microbial treatment needs under different water levels and water quality. Furthermore, an aeration component 36 is installed below the lower guide plate 32. The aeration component 36 uses an existing microporous aerator, which has high aeration efficiency and uniform bubbles. It is connected to an air pump through an independent pipeline. The air pump uses an existing Roots blower for sewage treatment to provide stable air pressure for the aeration component 36. The air outlet of the aeration component 36 faces directly below the guide hole 33 and is arranged one-to-one with the guide hole 33. This arrangement allows the aeration airflow to fully contact the sewage flowing out of the guide hole 33, improving dissolved oxygen efficiency and enhancing the biological treatment effect. Unlike the traditional dispersed arrangement of aeration components, the one-to-one arrangement can avoid the problem of uneven dissolved oxygen.

[0023] The pretreatment module 2 includes an inclined bar screen assembly 21. The inclined bar screen assembly 21 is a conventional rake-tooth bar screen used in existing wastewater treatment systems, which effectively intercepts impurities and is easy to clean. The inclined angle is 30-45°, referencing existing bar screen installation design specifications. This angle ensures effective impurity interception while facilitating cleaning by staff. An arc-shaped water collection trough 22 is located below the bar screen, with its bottom connected to a pipe interface, forming a "bar screen interception - arc-shaped flow guidance" pretreatment structure. Unlike traditional right-angle water collection tanks, the trough 22 can prevent sewage from accumulating at the corners of the tank, improving the efficiency of water flow. The inner wall of the arc-shaped water collection tank 22 is provided with spiral guide patterns 23, and the spiral guide patterns 23 rotate in the same direction as the water flow. The spiral guide patterns 23 can guide the sewage to form a spiral flow, improving the settling efficiency of suspended impurities in the sewage. A sewage outlet is provided at the bottom of the tank, and a removable sealing plug is provided at the sewage outlet. The sealing plug uses existing rubber sealing plugs, which have good sealing effect and are easy to disassemble and assemble, making it convenient to regularly clean the impurities deposited in the water collection tank.

[0024] The deep treatment module 4 is equipped with a partition plate 41, which divides the internal body of the box into a filtration zone 42 and a buffer zone 43. The filtration zone 42 contains two layers of ultrafiltration membrane modules 45. The buffer zone 43 can prevent the incoming water from directly impacting the ultrafiltration membrane modules 45, and plays a role in stabilizing the flow and buffering. A strip-shaped flow guide slit 44 with a width of 10-20mm is provided between the buffer zone 43 and the filtration zone 42. This slit width can achieve uniform flow restriction of sewage and prevent the water flow from impacting the ultrafiltration membrane modules 45 too fast and causing damage to the membrane fibers. The ultrafiltration membrane modules 45 are conventional hollow fiber ultrafiltration membranes used in sewage treatment, which have high filtration accuracy and large water flow. A flow divider plate 46 is provided between the two layers of modules. The flow divider plate 46 has evenly distributed flow divider holes with a diameter of 8-12mm. The flow divider plate can evenly distribute sewage to the upper and lower layers of ultrafiltration membrane modules 45, improve the overall filtration efficiency of the membrane modules, avoid excessive overflow load on a single layer of membrane modules, and extend the service life of the membrane modules.

[0025] The biochemical treatment module 3 is equipped with a sludge collection trough 35 at the bottom, which is arranged along the length of the box and located on one side of the aeration component 36. It can collect the activated sludge sediment generated during the biochemical treatment process. The bottom of the sludge collection trough 35 is connected to the sewage pipe interface. The sewage pipe interface has a built-in one-way valve. The one-way valve is a conventional rubber flap one-way valve used in existing sewage treatment, which can prevent sewage from flowing back to the sludge collection trough 35. The upper guide plate 31 and the lower guide plate 32 are equipped with sealing strips at the connection with the side wall of the box. The sealing strips are existing water-resistant and corrosion-resistant rubber sealing strips with a thickness of 3-5mm to ensure the sealing after the guide plate is connected to the box and to prevent sewage from leaking from the connection gap and affecting the diversion effect.

[0026] Each modular enclosure has an observation window on one side wall, corresponding to each treatment area. This allows staff to monitor the wastewater treatment status inside each module in real time without disassembling the equipment. The outside of the window is fitted with a waterproof sealing cover, which is fixed to the enclosure with bolts. The inside of the observation window is fitted with transparent, corrosion-resistant tempered glass with a thickness of 8-10mm. This thickness of tempered glass provides excellent pressure and impact resistance. The transparent anti-corrosion coating uses a special anti-corrosion coating for glass, which can resist the erosion of corrosive media in wastewater, ensuring the light transmittance and service life of the observation window.

[0027] A modular wastewater purification and treatment method includes the following steps: S1. Module Prefabrication: The Q235 steel structure box is mass-welded in the factory using existing mature submerged arc automatic welding technology to ensure welding quality and efficiency. A 1.5-2.0mm thick polyurea coating is sprayed. The polyurea spraying uses existing high-pressure airless polyurea spraying technology, which has strong coating adhesion and good sealing performance. The T-shaped mounting rail 13, lifting lug structure 11 and adjustable support feet 12 are assembled. The pretreatment module 2 is equipped with inclined grid assembly 21, arc-shaped water collection tank 22 with spiral guide pattern 23 and sealing plug. The biochemical treatment module 3 is equipped with stainless steel segmented upper guide plate 31, horizontal lower guide plate 32, elastic packing 37 frame, aeration assembly 36 and detachable guide baffle 34. The deep treatment module 4 is equipped with partition plate 41, double-layer ultrafiltration membrane assembly 45 and flow divider 46. The assembly includes standardized interfaces, observation windows, and sealing caps. After passing pressure, sealing, and electrical signal tests, the components are transported to the site. The pressure test uses existing water pressure testing equipment and is performed according to the existing wastewater treatment equipment test standard of holding pressure at 0.8MPa for 30 minutes. The sealing test uses the existing bubble detection method, and the electrical signal test uses existing multimeters and signal generators to ensure the quality of each module upon leaving the factory.

[0028] S2. On-site assembly: Determine the number of boxes and the specifications of the biochemical treatment module 3 according to the processing requirements. Position the boxes by lifting lugs and use an existing conventional crane to complete the lifting. Adjust the adjustable support feet 12 to level the boxes, align the T-shaped installation rails 13 of the adjacent boxes and push them in to lock them, ensuring that the docking gap is no more than 2mm. The pipe interface is connected and a pressure test of 0.8MPa for more than 30 minutes is conducted to meet the existing sewage treatment pipe connection sealing test standards. The circuit is connected through an aviation plug, and the air outlet of the aeration component 36 is adjusted to precisely align with the guide hole 33. The PLC parameters are preset and debugged. The PLC parameters are preset based on the experience of existing sewage treatment process parameters. The detachable guide baffle 34 is installed to ensure a tight fit with the slot. The entire assembly process does not require large special equipment and can be completed with only conventional tools, which greatly improves the efficiency of on-site deployment.

[0029] S3, Wastewater Purification: Start all modules and adjust the influent flow rate to 5-50m³ / h. 3 / h, this flow rate range is suitable for small and medium-sized sewage treatment needs. Sewage is intercepted by the inclined bar screen assembly 21 of the pretreatment module 2, and flows spirally along the arc-shaped water collection trough 22 with spiral guide pattern 23. It is then guided to the sedimentation tank and left to stand for 1.5-2.0 hours. This standing time is in reference to the existing sewage treatment pretreatment sedimentation specifications, which can achieve effective settling of suspended impurities. The sewage outlet seal plug of the sludge collection trough 35 is opened periodically to clean impurities. After entering the biochemical treatment module 3, the water flows along the "S"-shaped channel formed by the segmented upper guide plate 31 and the lower guide plate 32. It is guided by the detachable guide baffle 34 at the turning point. The water flow is split from top to bottom along the guide holes 33 with gradually changing diameters. It comes into contact with the gas released by the corresponding aeration components 36 below, which improves the dissolved oxygen efficiency. The packing frame is lowered to the preset height. After the sewage completes multiple turns and flows in the "S"-shaped channel, it comes into full contact with the surface of the packing and stays for 4-6 hours. This residence time has been verified by existing biochemical treatment processes and can ensure the effective degradation of organic matter in sewage by microorganisms. After biochemical treatment, wastewater flows into the buffer zone 43 of the advanced treatment module 4, and then flows at a constant speed into the filtration zone 42 through the strip-shaped guide slit 44. It is then evenly distributed to the upper and lower ultrafiltration membrane modules 45 through the diversion holes of the diversion plate 46, controlling the membrane flux to 10-15 L / (m²). 2 •h) Filtration pressure 0.1-0.2MPa. This parameter is the standard operating parameter for existing hollow fiber ultrafiltration membranes. It can ensure the filtration effect and avoid damage to the membrane module. After completing the filtration process, the processing status of each module can be checked through the observation window regularly to detect and deal with abnormal operating conditions in a timely manner.

[0030] S4. Flexible Adaptation: When the scale of treatment or water quality changes, shut down the corresponding module, disassemble the quick-release bolts and interfaces, add or remove the tank or replace the biochemical treatment module 3 with different gradual aperture specifications, reassemble and debug to ensure that the aeration component 36 and the guide hole 33 are precisely aligned. The entire adjustment process does not require disassembling the whole equipment, which greatly reduces the equipment adjustment cost. When the COD of the influent is higher than 500 mg / L, replace the biochemical treatment module 3 with the one with a gradual change in the flow rate of the guide hole 33 (12-20 mm). Reducing the diameter of the guide hole 33 can slow down the water flow. Remove some of the guide baffles to adjust the length of the "S"-shaped channel and extend the residence time to 6-8 hours to improve the degradation effect of microorganisms on high concentrations of organic matter. Regularly clean the sediment in the sludge collection tank 35 of the biochemical treatment module 3, and replace the sealing strips and the sealing cover of the observation window to ensure the long-term stable operation of the equipment.

[0031] In step 3, the control module 5 adjusts the lifting height of the packing frame of the biochemical treatment module 3 through the feedback signal of the data acquisition module, so that the packing is completely submerged in the sewage, and simultaneously adjusts the aeration volume so that the aeration airflow is consistent with the water flow direction after the diversion of the guide hole 33, further improving dissolved oxygen and contact efficiency. The water level difference between the filtration zone 42 and the buffer zone 43 of the deep treatment module 4 is controlled at 50-100mm. This water level difference can ensure that the sewage passes through the guide slit at a uniform speed. The ultrafiltration membrane module 45 is backwashed every 2 hours. The backwashing time is 5-10 minutes and the pressure is 0.15MPa. These backwashing parameters are the conventional maintenance parameters of the existing ultrafiltration membrane. They can effectively clean the pollutants on the membrane surface and restore the membrane flux. The backwash wastewater re-enters the treatment process through the return channel of the pretreatment module 2 to achieve secondary treatment of wastewater and avoid waste of water resources. In step 4, when cleaning the arc-shaped water collection tank 22 and the sludge collection tank 35, the corresponding modules are shut down and the one-way valve of the sewage discharge pipe is closed to prevent sewage backflow. After cleaning, the sealing plug and one-way valve are reset. The operation is simple and convenient, requiring no professional maintenance personnel, thus reducing equipment maintenance costs.

[0032] This modular wastewater purification treatment device and method is based on modular design. Each module is designed and assembled using existing mature industrial materials, universal interfaces and conventional equipment, which reduces the research and development and manufacturing costs of the equipment, while ensuring the reliability and versatility of the equipment. The standardized enclosure enables factory prefabrication and rapid on-site assembly, allowing for flexible adjustments to the treatment capacity by increasing or decreasing the enclosure size. This effectively solves the problems of large size, difficult transportation, long on-site deployment cycle, and fixed treatment capacity of traditional integrated sewage treatment devices. The internal design of the device features an "S"-shaped water flow channel formed by the interlacing of segmented inclined upper guide plate 31 and horizontal lower guide plate 32, guide holes 33 with gradually changing diameters along the water flow direction, slotted detachable guide baffles 34, lifting elastic packing frame, a deep treatment structure that combines vertical strip guide slots 44 with horizontal diversion plates 46, and an arc-shaped water collection trough 22 with spiral guide patterns 23. All of these structures are designed based on existing fluid mechanics and sewage treatment process principles. The various structures work together to flexibly adjust the equipment operating conditions according to changes in sewage discharge and water quality indicators, optimize the treatment flow, improve the contact efficiency between sewage and packing, aeration airflow, and membrane modules, and enhance the treatment effect. This solves the problems of fixed internal structure and poor process adaptability of traditional devices. Furthermore, all detachable components adopt a standardized quick-release design, coupled with observation windows on the side walls of the modules, facilitating daily inspections, partial replacements, cleaning, and maintenance by staff. This significantly reduces the maintenance and upgrade costs of the equipment. The modules are connected through standardized interfaces and sealing structures, ensuring strong synergy and reliable sealing. This effectively prevents sewage leakage and electrical signal transmission failures. The overall device is adaptable to diverse sewage treatment scenarios, including urban domestic sewage, industrial park wastewater, and emergency sewage treatment. It fills the technological gap in traditional sewage treatment devices, which cannot simultaneously achieve modular adaptability, process flexibility, and ease of maintenance, and possesses significant industrial application value.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A modular wastewater purification and treatment device, characterized in that: The modular box (1) includes several standardized sizes, and the modular box (1) includes at least a pretreatment module (2), a biochemical treatment module (3), a deep treatment module (4) and a control module (5). Each modular box (1) is provided with a lifting lug structure (11) on the top and an adjustable support foot (12) on the bottom. The inner side of the box is provided with a polyurea anti-corrosion coating and a T-shaped installation rail (13) arranged along the length direction. Standardized flange-type pipe interfaces and waterproof aviation plugs are fixedly assembled at the corresponding positions on the side walls. The pipe interfaces have built-in sealing gaskets and anti-backflow valves. The aviation plugs are provided with anti-misinsertion positioning structures.

2. The modular wastewater purification and treatment device according to claim 1, characterized in that: The biochemical treatment module (3) is equipped with an upper guide plate (31) and a lower guide plate (32). The upper guide plate (31) is a segmented inclined structure, and the lower guide plate (32) is a horizontal structure. The two are interlocked to form an "S"-shaped water flow channel. The lower guide plate (32) has evenly distributed guide holes (33). The guide holes (33) are set with a gradually changing aperture along the water flow direction. Each modular box (1) can be quickly assembled through a T-shaped mounting rail (13) and a standardized interface. The number of biochemical treatment modules (3) can be flexibly increased or decreased and different guide hole (33) specifications can be replaced. The biochemical treatment module (3) has a detachable flow guide baffle (34) at the turn of the "S"-shaped channel on its side wall. The detachable flow guide baffle (34) is connected to the side wall of the box through a slot.

3. The modular wastewater purification and treatment device according to claim 1, characterized in that: The modular box (1) is made of Q235 steel structural components welded together, and the thickness of the anti-corrosion coating on the inner side of the box is 1.5-2.0mm; The upper and lower guide plates (32) of the biochemical treatment module (3) are made of stainless steel, with a parallel spacing of 300-500mm. The diameter of the guide holes (33) gradually changes from 15mm to 25mm along the water flow direction, and the center spacing of the holes is 50-80mm. The segmented upper guide plate (31) has an inclination angle of 15-20° for each segment, and a gap of 10-15mm is reserved at the connection between adjacent segments; Each modular box (1) has the same structure and universal interface. After adjacent boxes are connected by T-shaped mounting rails (13), they are locked and fixed with quick-release bolts. The connection gap is no more than 2mm.

4. The modular wastewater purification and treatment device according to claim 1, characterized in that: The control module (5) has a built-in PLC controller and data acquisition module, and establishes an electrical signal connection with each functional module through an aviation plug; An elastic packing (37) is provided between the upper guide plate (31) and the lower guide plate (32) inside the biochemical treatment module (3). The elastic packing (37) frame can be raised and lowered along the slide rail inside the box. An aeration assembly (36) is provided below the lower guide plate (32), which is connected to an air pump through an independent pipeline. The air outlet of the aeration assembly (36) faces directly below the guide hole (33) and is arranged in a one-to-one correspondence with the guide hole (33).

5. The modular wastewater purification and treatment device according to claim 1, characterized in that: The pretreatment module (2) is equipped with an inclined grid assembly (21) with an inclination angle of 30-45°. An arc-shaped water collection trough (22) is provided below the grid. The bottom of the water collection trough (22) is connected to the pipe interface to form a "grid interception-arc guide" pretreatment structure. The inner wall of the arc-shaped water collection trough (22) is provided with a spiral guide pattern (23). The spiral guide pattern (23) rotates in the same direction as the water flow. A drain outlet is provided at the bottom of the trough, and a detachable sealing plug is provided at the drain outlet.

6. The modular wastewater purification and treatment device according to claim 1, characterized in that: The deep processing module (4) is provided with a partition plate (41) to divide the inner part of the box into a filtration zone (42) and a buffer zone (43). A strip guide slit (44) with a width of 10-20mm is provided between the buffer zone (43) and the filtration zone (42). The filtration zone (42) is provided with two layers of ultrafiltration membrane components (45). A flow divider plate (46) is provided between the two layers of components. The flow divider plate (46) has evenly distributed flow divider holes with a diameter of 8-12mm.

7. The modular wastewater purification and treatment device according to claim 1, characterized in that: The biochemical treatment module (3) is provided with a sludge collection trough (35) at the bottom. The sludge collection trough (35) is arranged along the length of the box and located on one side of the aeration component (36). The bottom of the sludge collection trough (35) is connected to the sewage pipe interface. The sewage pipe interface has a built-in one-way valve. The upper guide plate (31), the lower guide plate (32) and the side wall of the box are provided with sealing strips. The thickness of the sealing strips is 3-5mm.

8. The modular wastewater purification and treatment device according to claim 1, characterized in that: Each modular box (1) has an observation window on its side wall. The observation window is set for each processing area. A waterproof sealing cover is set on the outside of the window. The sealing cover is fixed to the box by bolts. A transparent anti-corrosion tempered glass with a thickness of 8-10mm is set on the inside of the observation window.

9. A modular wastewater purification treatment method based on the apparatus according to any one of claims 1-8, characterized in that: Includes the following steps: S1. Module prefabrication: Q235 steel structure box body is welded in batches in the factory, sprayed with 1.5-2.0mm thick polyurea coating, and assembled with T-type mounting rail (13), lifting lug structure (11) and adjustable support feet (12). The pretreatment module (2) is equipped with an inclined grid assembly (21), an arc-shaped water collection tank (22) with spiral guide lines (23) and a sealing plug. The biochemical treatment module (3) is equipped with a stainless steel segmented upper guide plate (31), a horizontal lower guide plate (32), an elastic packing (37) frame, an aeration assembly (36) and a detachable guide baffle (34). The deep treatment module (4) is equipped with a partition plate (41), a strip guide slit (44), a double-layer ultrafiltration membrane assembly (45) and a flow divider (46). After assembling standardized interfaces, observation windows, and sealing caps, and passing pressure, sealing, and electrical signal tests, the equipment is transported to the site. S2. On-site assembly: Determine the number of boxes and the specifications of the biochemical treatment module (3) according to the processing requirements. Position the box by lifting lugs, adjust the adjustable support feet (12) to level it, align the T-shaped installation rails (13) of the adjacent boxes and push them in to lock them, ensuring that the docking gap is no more than 2mm. Connect the pipe interface and perform a pressure test of 0.8MPa for more than 30 minutes. Connect the circuit through the aviation plug, adjust the air outlet of the aeration component (36) to correspond precisely with the guide hole (33), complete the PLC parameter preset and debugging, and install the detachable guide baffle (34) to ensure that it fits tightly with the slot. S3, Wastewater Purification: Start all modules and adjust the influent flow rate to 5-50m³ / h. 3 / h, wastewater is intercepted by the inclined bar grid assembly (21) of the pretreatment module (2), flows spirally along the arc-shaped water collection trough (22) with spiral guide pattern (23), and is guided to the sedimentation tank to stand for 1.5-2.0 hours. The sludge collection trough (35) is opened periodically to clean the sewage outlet seal plug. After entering the biochemical treatment module (3), the water flows along the "S"-shaped channel formed by the segmented upper guide plate (31) and the lower guide plate (32), and is guided by the detachable guide baffle (34) at the turning point. The water flow is divided from top to bottom along the guide hole (33) with gradually changing aperture, and comes into contact with the gas released by the corresponding aeration components (36) below. The packing frame is lowered to the preset height. After the sewage completes multiple turns and flows in the "S"-shaped channel, it comes into full contact with the surface of the packing and stays for 4-6 hours. After biochemical treatment, the wastewater flows into the buffer zone (43) of the deep treatment module (4), and then flows into the filtration zone (42) at a uniform speed through the strip guide slit (44). It is then evenly distributed to the upper and lower ultrafiltration membrane modules (45) through the diversion holes of the diversion plate (46), controlling the membrane flux to 10-15 L / (m³). 2 • h) Filter pressure 0.1-0.2MPa to complete the filtration process. Regularly check the processing status of each module through the observation window. S4. Flexible adaptation: When the scale of treatment or water quality changes, shut down the corresponding module, disassemble the quick-release bolts and interfaces, add or remove the box or replace the biochemical treatment module (3) with different gradual aperture specifications, reassemble and debug, and ensure that the aeration component (36) and the guide hole (33) are precisely aligned. When the COD of the influent is higher than 500 mg / L, replace the biochemical treatment module (3) with a gradual change range of 12-20 mm for the guide hole (33), disassemble part of the guide baffle to adjust the length of the "S" shaped channel, extend the residence time to 6-8 hours, regularly clean the sediment in the sludge collection tank (35) of the biochemical treatment module (3), and replace the sealing strip and the observation window sealing cover.

10. The modular wastewater purification and treatment method according to claim 9, characterized in that: In step (3), the control module (5) adjusts the lifting height of the packing frame of the biochemical treatment module (3) by feeding back the signal through the data acquisition module, so that the packing is completely submerged in the sewage, and simultaneously adjusts the aeration volume so that the aeration airflow is consistent with the direction of the water flow after the diversion of the guide hole (33). The water level difference between the filtration zone (42) and the buffer zone (43) of the deep treatment module (4) is controlled at 50-100mm. The ultrafiltration membrane module (45) is backwashed every 2 hours. The backwashing time is 5-10 minutes and the pressure is 0.15MPa. The backwash wastewater re-enters the treatment process through the return channel of the pretreatment module (2). In step (4), when cleaning the arc-shaped water collection tank (22) and the mud collection tank (35), shut down the corresponding module and close the one-way valve of the sewage pipe. After cleaning, reset the sealing plug and the one-way valve.

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