A stepwise sewage treatment apparatus and method

Abstract

The application discloses a kind of hierarchical sewage treatment equipment and method, equipment includes the pretreatment mechanism, membrane aeration biofilm reactor, depth purification mechanism and disinfection mechanism connected in turn;Pretreatment mechanism includes the pretreatment containing pool with opening upwards, the grid support ring coaxial with it is fixed in pretreatment containing pool, grid support ring is equipped with multiple filtration grids along its radial flow;Depth purification mechanism includes the depth purification containing pool with opening upwards, multiple vertical extension flocculating agent delivery pipes are fixed in depth purification containing pool, flocculating agent delivery pipe has multiple flocculating agent sprayers on it;The equipment can realize hierarchical progressive treatment, high purification precision, form "coarse filtration→degradation→fine division→sterilization" complete purification chain, ensure that effluent quality is stable and up to standard.

Description

Technical Field

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

[0002] A staged wastewater treatment system is a system that purifies wastewater step by step through a multi-stage process. Its core lies in breaking down the removal of different pollutants into multiple independent units for targeted treatment. For example, a common staged system might include pretreatment (such as bar screens to intercept large particles), biological treatment (using microorganisms to degrade organic matter), and advanced treatment (such as filtration or chemical precipitation). This design allows for flexible adjustment of process combinations based on water quality differences, significantly improving treatment efficiency, and is particularly suitable for scenarios with strict requirements on specific pollutants such as nitrogen and phosphorus.

[0003] However, the existing technology still lacks in the coordination and processing efficiency of various institutions, and needs further improvement and optimization. Summary of the Invention

[0004] The purpose of this invention is to provide a graded sewage treatment equipment and method, which takes into account both stability and maintainability through detailed structural design, and is suitable for the treatment of various scenarios such as domestic sewage and small and medium-sized industrial wastewater.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A graded wastewater treatment device includes a pretreatment unit, a membrane aeration biofilm reactor, a deep purification unit, and a disinfection unit connected in sequence. The pretreatment mechanism includes an upward-opening pretreatment container tank, with a grid support ring fixed inside the pretreatment container tank and multiple filter grids that flow radially along the grid support ring. A filtration channel is formed between the inner wall of the pretreatment containment tank and the outer side of the grid support ring; Multiple pretreatment input pipes connected to the filtration channel are installed on the outside of the pretreatment containment tank; The deep purification mechanism includes an upward-opening deep purification containment tank, inside which are fixed multiple vertically extending flocculant delivery pipes, each with multiple flocculant nozzles. Multiple magnetic powder conveying pipes are slidably arranged radially on the side wall of the deep purification containment tank, and multiple magnetic powder discharge holes are located on the lower side of the magnetic powder conveying pipes. The deep purification containment tank is equipped with multiple magnetic separation columns. The magnetic separation columns have a hollow structure inside, and multiple electromagnets are fixed on the inner side wall of the magnetic separation columns. The disinfection mechanism includes a disinfection container shell, inside which are fixed a disinfection input manifold and a disinfection output manifold arranged in parallel. Multiple disinfection flow branch pipes are connected between the disinfection input manifold and the disinfection output manifold. The outer side of the disinfection flow branch pipe is fitted with a disinfection support tube shell arranged coaxially with it, and multiple constantly lit ultraviolet disinfection lamps are fixed on the inner wall of the disinfection support tube shell.

[0006] Preferably, the pretreatment input pipe is connected to the filter channel through a pretreatment flow equalization mechanism. The pretreatment flow equalization mechanism includes multiple input flow shells fixed on the outer wall of the pretreatment container, and the side wall of the pretreatment container has multiple input communication slots that communicate with the inside of the input flow shells. Multiple pre-processing input tubes are connected one-to-one with each input flow shell; Multiple parallel flow equalization support shafts are rotatably connected inside each input flow housing, and an input flow guide plate is fixed on the flow equalization support shaft; One end of the flow equalization support shaft extends to the outside of the input flow housing. Adjacent flow equalization support shafts are connected by a synchronous belt. One of the flow equalization support shafts is driven to rotate by a flow guide motor fixed on the outer wall of the input flow housing through gear transmission.

[0007] Explanation: During the input process, the wastewater first passes through the pretreatment flow equalization mechanism. The wastewater enters the input flow shell through the pretreatment input pipe and flows radially along the pretreatment containment tank. The flow direction of the wastewater in the input flow shell is adjusted by adjusting the inclination angle of the input guide plate, which helps to maintain a stable flow of wastewater in the input flow shell.

[0008] Preferably, a bar screen cleaning mechanism is provided at the top of the pretreatment container tank. The bar screen cleaning mechanism includes a cleaning support ring fixed to the top of the pretreatment container tank, a cleaning rotating ring rotatably connected to the cleaning support ring, and a plurality of cleaning support beams extending radially thereon fixed on the cleaning rotating ring. A cleaning support slider is slidably connected to the cleaning support beam. A lifting connecting shaft is slidably connected to the cleaning support slider along the vertical direction. A pressure support plate is fixed to the lower end of the lifting connecting shaft. Two cleaning clamping plates are slidably connected to the bottom of the pressure support plate. The cleaning support beam has a vertically penetrating support connection groove that extends radially along the cleaning rotation ring, and the cleaning support slider is slidably connected in the support connection groove; The bottom of the pressure support plate is fixed with an arc-shaped slide rail. Two clamping drive sliders are slidably connected on each arc-shaped slide rail. The two cleaning clamping plates are fixed to the bottom of the two clamping drive sliders one by one. A lifting support column is fixed to the top of the cleaning support slider, and a vertically extending lifting support slide rail is fixed to the side of the lifting support column. A lifting drive slider is slidably connected to the lifting support slide rail, and the lifting drive slider is fixedly connected to the upper end of the lifting connecting shaft. Multiple filter residue storage boxes with upward-facing openings are fixed on the outside of the pretreatment container.

[0009] Instructions: The screen cleaning mechanism cleans debris trapped on the outside of the filter screen. Initially, the lower support plate is directly above the filter channel. When the filter screen needs cleaning, the lifting drive slider moves the lifting connecting shaft and the lower support plate downwards together. During the downward movement, the lower support plate acts as a scraper on the outer side of the filter screen, gradually pushing the debris on the outside of the filter screen to the bottom of the filter channel. Then, the two clamping drive sliders move the two cleaning clamping plates closer together, clamping the debris between the two cleaning clamping plates.

[0010] Preferably, the magnetic separation column is connected to the deep purification containment tank through a flocculation transfer mechanism. The flocculation transfer mechanism includes a transfer support ring disposed above the deep purification containment tank and extending vertically along its axis. A rotating support disk is rotatably connected to the inner side of the transfer support ring, and multiple magnetic separation columns are fixed to the bottom of the rotating support disk. An upward-facing lifting and fixing cylinder is fixed to the outside of the deep purification containment tank. A lifting and sliding cylinder is slidably connected inside the lifting and fixing cylinder. A vertically extending deflection connecting shaft is fixed to the top of the lifting and sliding cylinder. A deflection connecting ring is rotatably connected to the deflection connecting shaft. The deflection connecting ring is fixedly connected to the transfer support ring through a support connecting plate. The lifting fixed cylinder is equipped with a lifting drive rod for driving the lifting sliding cylinder to move up and down; Next to the deep purification containment tank is a flocculation storage tank with its opening facing upwards.

[0011] Instructions: The flocculation transfer mechanism removes the flocs from the deep purification containment tank. The inner rod of the lifting drive rod extends and drives the lifting sliding cylinder, deflection connecting shaft, deflection connecting ring, transfer support ring, rotating support plate, and multiple magnetic separation columns to move upward together, so that the lower end of the magnetic separation columns is higher than the top of the deep purification containment tank.

[0012] Preferably, a flocculation scraping ring is slidably connected to the magnetic separation column, and multiple scraping lifting shafts are slidably connected to the rotating support plate in the vertical direction, with the lower ends of the scraping lifting shafts being fixedly connected to each flocculation scraping ring. Multiple vertically extending scraping support columns are fixed to the top of the rotating support plate. Vertically extending scraping drive slide rails are fixed to the scraping support columns. Scraping drive sliders are slidably connected to the scraping drive slide rails. Each scraping drive slider is fixedly connected to the upper end of each scraping lifting shaft.

[0013] Explanation: After the electromagnet is de-energized, the scraping drive slider is driven by a servo motor of existing technology through gear and rack transmission to move along the scraping drive slide rail. The scraping drive slider drives the scraping lifting shaft together with the flocculation scraping ring to move down. The flocculation scraping ring scrapes off the flocs adsorbed on the outside of the magnetic separation column, so that the flocs fall into the flocculation storage pool below.

[0014] Preferably, a central support tube shell is fixed inside the disinfection flow branch tube and arranged coaxially therewith. A disinfection flow channel is formed between the inner wall of the disinfection flow branch tube and the outer wall of the central support tube shell. Both the disinfection flow branch tube and the central support tube shell are made of transparent glass. Multiple pulsed ultraviolet disinfection lamps are fixed on the inner wall of the central support tube shell.

[0015] Instructions: Multiple pulsed ultraviolet disinfection lamps are turned on. The pulse frequency of the pulsed ultraviolet disinfection lamps is 5Hz. Under the continuous irradiation of the constant-on ultraviolet disinfection lamps and the pulse irradiation of the pulsed ultraviolet disinfection lamps, the sewage is disinfected in combination to ensure good disinfection effect.

[0016] Preferably, a filling support beam is fixed on the outer wall of the deep purification containment tank and extends radially therefrom. A filling support slide rail is fixed on the lower side of the filling support beam. A filling support slider is slidably connected on the filling support slide rail. The end of the magnetic powder conveying pipe located outside the deep purification containment tank is fixedly connected to the filling support slider.

[0017] Instructions: When adding ferromagnetic powder to the deep purification container, the adding support slider moves towards the deep purification container, which in turn drives the magnetic powder delivery pipe to extend into the deep purification container. After the ferromagnetic powder is added, the adding support slider moves away from the deep purification containment tank, and the adding support slider then drives the magnetic powder conveying pipe to be pulled out from inside the deep purification containment tank.

[0018] Preferably, a vertically extending pretreatment drain pipe is fixed at the bottom of the pretreatment container tank, located inside the grid support ring, and the lower end of the pretreatment drain pipe extends downward to the outside of the pretreatment container tank. The pretreatment discharge pipe has multiple interconnected pretreatment discharge holes on one side wall inside the pretreatment container tank. The lower end of the pretreatment discharge pipe is connected to the input end of the membrane aeration biofilm reactor through the first pipe, and the output end of the membrane aeration biofilm reactor is connected to the interior of the deep purification containment tank through the second pipe. The interior of the deep purification containment tank is connected to the interior of the disinfection input and collection pipe via a third pipe.

[0019] The present invention also provides a graded wastewater treatment method, based on the above-mentioned graded wastewater treatment equipment, comprising the following steps: S1. Preliminary filtration treatment: The wastewater to be treated is fed into the pretreatment container tank through the pretreatment input pipe. After entering the filtration channel, the wastewater flows from the outside to the center. The wastewater passes through multiple filter grids and enters the inner side of the grid support ring. The filter grids are used to filter the wastewater. S2, Biological purification treatment: The filtered wastewater is transferred to a membrane aeration biofilm reactor, where it undergoes simultaneous nitrification and denitrification for 5 to 10 hours. S3, Deep purification treatment: After nitrification and denitrification treatment, the wastewater is transferred to a deep purification tank. Flocculant is introduced into the flocculant delivery pipe and sprayed from multiple flocculant nozzles to mix with the wastewater in the deep purification tank, thereby treating the wastewater by flocculation and removing suspended solids. Ferromagnetic powder is fed into the magnetic powder conveying pipe and discharged from the magnetic powder discharge hole into the deep purification containment tank. Ferromagnetic powder can accelerate flocculation and agglomeration and form flocs with a high specific gravity, which is conducive to the rapid settling of flocs. S4. Floc separation treatment: When the electromagnets in multiple magnetic separation columns are energized, the flocs containing ferromagnetic powder will be adsorbed onto the outer surface of the magnetic separation column under the attraction of the magnetic field, thus quickly separating the flocs from the wastewater. S5. Wastewater disinfection treatment: After floc separation treatment, the wastewater is transferred to the disinfection input and collection pipe. The wastewater in the disinfection input and collection pipe flows to the disinfection output and collection pipe through multiple disinfection flow branches. During the flow of the wastewater in the multiple disinfection flow branches, the constantly lit ultraviolet disinfection lamps are turned on to irradiate the wastewater in the disinfection flow branches, and the wastewater is disinfected by ultraviolet light. The flow velocity of wastewater in the disinfection and circulation branch pipe is 0.1~0.3m / s; The wastewater after disinfection flows into the disinfection output pipe to form clean water, which is then discharged through another pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: 1. The present invention has a reasonable structural design, which can realize graded progressive treatment and high purification accuracy. The equipment adopts a four-stage series process of "pretreatment → membrane aeration biofilm reaction → deep purification → disinfection". Each stage is designed to address different types of pollutants, forming a complete purification chain of "coarse filtration → degradation → fine separation → sterilization" to ensure that the effluent water quality is stable and meets the standards. 2. The present invention is easy to operate. The pretreatment stage is designed with equal flow, anti-clogging and automatic sludge removal, which reduces operation and maintenance costs. The pretreatment equal flow mechanism can evenly distribute sewage to the filtration channel, avoid local screens from accumulating sludge quickly due to excessive flow, extend the service life of the screens and improve filtration efficiency. 3. The screen cleaning mechanism of the present invention achieves three-dimensional action through "cleaning rotating ring, lifting connecting shaft, and cleaning clamping plate". With the precise positioning of the grating ruler, it can automatically clamp the accumulated residue on the filter screen and transfer it to the filter residue temporary storage box on the outside. Compared with traditional manual cleaning, it not only reduces the labor intensity of maintenance personnel, but also avoids equipment downtime due to untimely cleaning, and ensures continuous operation. 4. The deep purification mechanism of this invention solves the problems of "long residence time and low separation efficiency" of traditional flocculation sedimentation by combining "precise addition of flocculant, magnetic powder enhancement and magnetic separation". It has multiple built-in magnetic separation columns, which can quickly adsorb "magnetic powder-floc" complex after being energized. The separation speed is 5 to 10 times that of traditional sedimentation, which greatly shortens the residence time of sewage in the deep purification tank and increases the overall processing capacity of the equipment. 5. The disinfection mechanism of the present invention forms dual ultraviolet irradiation through "dual ultraviolet disinfection plus optimized flow channel design", which can effectively kill pathogenic microorganisms that are difficult to inactivate by traditional ultraviolet light, such as spores, greatly improving the thoroughness of disinfection and ensuring the disinfection effect while avoiding residual chlorine pollution caused by chemical disinfection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall layout of the present invention; Figure 2 This is a schematic diagram of the pretreatment mechanism of the present invention; Figure 3 yes Figure 2 Top view; Figure 4 This is a right view of the pretreatment flow equalization mechanism of the present invention; Figure 5 This is a top view of the support beam cleaning method according to the present invention; Figure 6 This is a bottom view of the pressure support plate of the present invention; Figure 7 This is a schematic diagram of the deep purification mechanism of the present invention; Figure 8 This is a schematic diagram of the magnetic powder conveying pipe of the present invention; Figure 9 This is a schematic diagram of the flocculation scraping ring of the present invention; Figure 10 This is a schematic diagram of the disinfection mechanism of the present invention; Figure 11 This is a schematic diagram of the central support tube shell of the present invention.

[0022] In the diagram, 10-pretreatment mechanism, 101-first pipe, 11-pretreatment containment tank, 110-filtration channel, 111-pretreatment input pipe, 112-pretreatment discharge pipe, 1120-pretreatment discharge hole, 12-grid support ring, 13-filter grid, 14-pretreatment flow equalization mechanism, 141-input flow shell, 142-input connecting slot, 143-flow equalization support shaft, 144-input guide plate, 145-synchronous belt, 146-flow guide drive motor, 15-grid cleaning mechanism, 150 - Filter cake temporary storage box, 151- Cleaning support ring, 152- Cleaning rotating ring, 153- Cleaning support beam, 1530- Support connecting slide, 154- Cleaning support slider, 155- Lifting connecting shaft, 156- Pressing support plate, 157- Cleaning clamping plate, 158- Arc-shaped slide rail, 159- Clamping drive slider, 16- Lifting support column, 161- Lifting support slide rail, 162- Lifting drive slider, 20- Membrane aeration biofilm reactor, 201- Second pipeline, 30- Deep purification mechanism, 301 - Third pipeline, 31- Deep purification containment tank, 32- Flocculant delivery pipe, 320- Flocculant nozzle, 33- Magnetic powder delivery pipe, 330- Magnetic powder discharge hole, 34- Magnetic separation column, 341- Electromagnet, 35- Flocculation transfer mechanism, 351- Transfer support ring, 352- Rotating support plate, 353- Lifting fixed cylinder, 354- Lifting sliding cylinder, 355- Deflection connecting shaft, 356- Deflection connecting ring, 357- Support connecting plate, 358- Lifting drive rod, 36- Flocculation scraping ring, 361 - Scraping lifting shaft, 362 - Scraping support column, 363 - Scraping drive slide rail, 364 - Scraping drive slider, 37 - Filling support beam, 371 - Filling support slide rail, 372 - Filling support slider, 40 - Disinfection mechanism, 41 - Disinfection housing shell, 421 - Disinfection input summary pipe, 422 - Disinfection output summary pipe, 43 - Disinfection flow branch pipe, 430 - Disinfection flow channel, 44 - Disinfection support tube shell, 440 - Constant light ultraviolet disinfection lamp, 45 - Central support tube shell, 450 - Pulsed ultraviolet disinfection lamp. Detailed Implementation

[0023] The following is combined with Figures 1-11 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0024] Example 1: A tiered wastewater treatment device, such as Figure 1 As shown, it includes a pretreatment unit 10, a membrane aeration biofilm reactor 20, a deep purification unit 30, and a disinfection unit 40 connected in sequence. like Figure 2As shown, the pretreatment mechanism 10 includes a pretreatment container 11 with the opening facing upward. A grid support ring 12 coaxial with the pretreatment container 11 is fixed inside the pretreatment container 11. A plurality of filter grids 13 are provided on the grid support ring 12 that flow radially therethrough. Filter grid 13 is a product of existing technology; like Figure 3 As shown, a filtration channel 110 is formed between the inner wall of the pretreatment containment tank 11 and the outer side of the grid support ring 12; Multiple pretreatment input pipes 111 connected to the filter channel 110 are provided on the outside of the pretreatment container tank 11; like Figure 7 As shown, the deep purification mechanism 30 includes a deep purification container 31 with the opening facing upward. Multiple vertically extending flocculant delivery pipes 32 are fixed inside the deep purification container 31. Multiple flocculant nozzles 320 are provided on the flocculant delivery pipes 32. Multiple magnetic powder conveying pipes 33 are slidably arranged radially on the side wall of the deep purification containment tank 31, and multiple magnetic powder discharge holes 330 are provided on the lower side of the magnetic powder conveying pipes 33. The deep purification containment tank 31 is equipped with multiple magnetic separation columns 34. The magnetic separation column 34 has a hollow structure inside. Multiple electromagnets 341 are fixed on the inner side wall of the magnetic separation column 34. The electromagnets 341 are products of existing technology. like Figure 10 As shown, the disinfection mechanism 40 includes a disinfection housing 41, in which a disinfection input collection pipe 421 and a disinfection output collection pipe 422 are fixed in parallel arrangement, and multiple disinfection flow branch pipes 43 are connected between the disinfection input collection pipe 421 and the disinfection output collection pipe 422. The disinfection flow branch pipe 43 is fitted with a disinfection support tube shell 44 arranged coaxially with it, and multiple constantly lit ultraviolet disinfection lamps 440 are fixed on the inner wall of the disinfection support tube shell 44. The 440 constant-on UV disinfection lamp is a product of existing technology. For example, a Philips TUV series model TUV 130W UV disinfection lamp can be used, with a power of 130 W and a wavelength of 253.7nm. like Figure 2 As shown, a vertically extending pretreatment drain pipe 112 is fixed at the bottom of the pretreatment container 11, located inside the grid support ring 12. The lower end of the pretreatment drain pipe 112 extends downward to the outside of the pretreatment container 11. The pretreatment discharge pipe 112 has multiple pretreatment discharge holes 1120 that communicate with each other inside and outside on one end of the side wall inside the pretreatment container tank 11; like Figure 1As shown, the lower end of the pretreatment discharge pipe 112 is connected to the input end of the membrane aeration biofilm reactor 20 through the first pipe 101, and the output end of the membrane aeration biofilm reactor 20 is connected to the interior of the deep purification containment tank 31 through the second pipe 201. The membrane aeration biofilm reactor 20 is a product of existing technology. For example, it can be the OxyFAS series of OxyMem (DuPont), specifically the standard modular membrane aeration biofilm reactor model OxyFAS, with a treatment capacity of 4 kg ammonia nitrogen / day. The interior of the deep purification containment tank 31 is connected to the interior of the disinfection input and collection pipe 421 through the third pipe 301.

[0025] Example 2: This example describes a graded wastewater treatment method based on a graded wastewater treatment device from Example 1 above, including the following steps: S1. Preliminary filtration treatment: The wastewater to be treated is fed into the pretreatment container tank 11 through the pretreatment input pipe 111. After entering the filtration channel 110, the wastewater flows from the outside to the center. The wastewater passes through multiple filter grids 13 and enters the inner side of the grid support ring 12. The wastewater is filtered by the filter grids 13. S2, Biological purification treatment: The filtered wastewater is transferred to the membrane aeration biofilm reactor 20, where it undergoes simultaneous nitrification and denitrification treatment for 8 hours. S3, Deep purification treatment: After nitrification and denitrification treatment, the wastewater is transferred to the deep purification containment tank 31. Flocculant is introduced into the flocculant delivery pipe 32. The flocculant is sprayed from multiple flocculant nozzles 320 and mixed with the wastewater in the deep purification containment tank 31 to perform flocculation treatment on the wastewater and remove suspended solids from the wastewater. Ferromagnetic powder is fed into the magnetic powder conveying pipe 33. The ferromagnetic powder is discharged from the magnetic powder discharge hole 330 and falls into the deep purification containment tank 31. Ferromagnetic powder can accelerate flocculation and agglomeration and form flocs with a high specific gravity, which is conducive to the rapid settling of flocs. S4. Floc separation treatment: When the electromagnets 341 in the multiple magnetic separation columns 34 are energized, the flocs containing ferromagnetic powder will be adsorbed onto the outer surface of the magnetic separation column 34 under the attraction of the magnetic field, thus quickly separating the flocs from the sewage. S5. Wastewater disinfection treatment: After floc separation treatment, the wastewater is transferred to the disinfection input collection pipe 421. The wastewater in the disinfection input collection pipe 421 flows to the disinfection output collection pipe 422 through multiple disinfection flow branch pipes 43. During the flow of the wastewater in the multiple disinfection flow branch pipes 43, the constantly lit ultraviolet disinfection lamp 440 is turned on to irradiate the wastewater in the disinfection flow branch pipes 43, and the wastewater is disinfected by ultraviolet light. The flow velocity of the wastewater in the disinfection and circulation branch pipe 43 is 0.1 m / s; The wastewater after disinfection flows into the disinfection output pipe 422 to form clean water, and the clean water in the disinfection output pipe 422 is then discharged through another pipe.

[0026] Example 3: Based on Example 1, such as Figure 2 As shown, the pretreatment input pipe 111 is connected to the filter channel 110 through the pretreatment flow equalization mechanism 14, as... Figure 4 As shown, the pretreatment flow equalization mechanism 14 includes a plurality of input flow shells 141 fixed on the outer side wall of the pretreatment container 11, and the side wall of the pretreatment container 11 has a plurality of input communication slots 142 that communicate with the interior of the input flow shells 141. Multiple pre-processing input tubes 111 are connected one-to-one with each input flow shell 141; Multiple parallel flow equalization support shafts 143 are rotatably connected inside each input flow housing 141, and an input flow guide plate 144 is fixed on the flow equalization support shaft 143. The flow equalization support shaft 143 is arranged horizontally and is perpendicular to the flow direction of the input flow shell 141; One end of the flow equalization support shaft 143 extends to the outside of the input flow housing 141. Two adjacent flow equalization support shafts 143 are connected by a synchronous belt 145. One of the flow equalization support shafts 143 is driven to rotate by a flow guide drive motor 146 fixed on the outer wall of the input flow housing 141 through gear transmission.

[0027] Synchronous belt 145 is a product of existing technology, and flow-guided drive motor 146 is a servo motor of existing technology.

[0028] Example 4: This example describes a graded sewage treatment method based on a graded sewage treatment device in Example 3 above. The difference from Example 2 is that in step S1, during the input process, the sewage first passes through the pretreatment flow equalization mechanism 14. The sewage first enters the input flow shell 141 through the pretreatment input pipe 111. The sewage flows radially along the pretreatment containment tank 11 in the input flow shell 141. The sewage in the input flow shell 141 then enters the filter channel 110 through multiple input connecting slots 142. The flow guide motor 146 drives one of the flow equalization support shafts 143 to deflect via gear transmission. The two adjacent flow equalization support shafts 143 deflect synchronously via a synchronous belt 145. The flow equalization support shafts 143 then drive the input flow guide plate 144 to deflect together. Adjusting the inclination angle of the input flow guide plate 144 adjusts the flow direction of sewage in the input flow shell 141, which helps to maintain stable sewage flow in the input flow shell 141.

[0029] Example 5: Based on Example 3, such as Figure 2 As shown, a bar screen cleaning mechanism 15 is provided on the top of the pretreatment container pool 11. The bar screen cleaning mechanism 15 includes a cleaning support ring 151 fixed on the top of the pretreatment container pool 11. A cleaning rotating ring 152 is rotatably connected to the cleaning support ring 151. A plurality of cleaning support beams 153 extending radially are fixed on the cleaning rotating ring 152. A cleaning support slider 154 is slidably connected to the cleaning support beam 153. A lifting connecting shaft 155 is slidably connected to the cleaning support slider 154 along the vertical direction. A pressing support plate 156 is fixed at the lower end of the lifting connecting shaft 155. Two cleaning clamping plates 157 are slidably connected to the bottom of the pressing support plate 156. like Figure 5 As shown, the cleaning support beam 153 has a vertically penetrating support connection groove 1530 that extends radially along the cleaning rotating ring 152, and the cleaning support slider 154 is slidably connected in the support connection groove 1530. The cleaning support slider 154 is driven by a prior art servo motor fixed thereon to move along the support connection groove 1530 via a gear and rack transmission; A grating ruler (not shown in the figure) for monitoring the relative position of the cleaning support slider 154 and the cleaning support beam 153 is provided between them. The scale grating of the grating ruler is fixed on the cleaning support beam 153, and the grating reading head of the grating ruler is fixed on the cleaning support slider 154. like Figure 6 As shown, an arc-shaped slide rail 158 is fixed at the bottom of the pressure support plate 156. Two clamping drive sliders 159 are slidably connected on each arc-shaped slide rail 158. Two cleaning clamping plates 157 are fixed to the bottom of the two clamping drive sliders 159 in a corresponding manner. The clamping drive slider 159 is driven by a servo motor of the prior art to move along the arc-shaped slide rail 158 via gear and rack transmission; A lifting support column 16 is fixed to the top of the cleaning support slider 154. A vertically extending lifting support slide rail 161 is fixed to the side of the lifting support column 16. A lifting drive slider 162 is slidably connected to the lifting support slide rail 161. The lifting drive slider 162 is fixedly connected to the upper end of the lifting connecting shaft 155. The lifting drive slider 162 is driven by a servo motor of the prior art to move along the lifting support slide rail 161 via gear and rack transmission; Multiple filter cake storage boxes 150 with upward-facing openings are fixed on the outside of the pretreatment containment tank 11; A grating ruler (not shown in the figure) for monitoring the relative position of the lifting drive slider 162 and the lifting support slide rail 161 is provided. The scale grating of the grating ruler is fixed on the lifting support slide rail 161, and the grating reading head of the grating ruler is fixed on the lifting drive slider 162.

[0030] Example 6: This example describes a graded sewage treatment method based on a graded sewage treatment device in Example 5 above. The difference from Example 4 is that in step S1, the bar cleaning mechanism 15 is used to clean the debris intercepted on the outside of the filter bar 13. In the initial state, the lower support plate 156 is directly above the filter channel 110. When the filter bar 13 needs to be cleaned, the lifting drive slider 162 is driven by the servo motor of the prior art through gear and rack transmission along the lifting support slide rail 161. The lifting drive slider 162 then drives the lifting connecting shaft 155 and the lower support plate 156 to move down together. As the downward support plate 156 gradually extends into the filter channel 110, the downward support plate 156 acts as a scraper on the outer side of the filter grid 13 during the downward movement, gradually pushing the debris on the outside of the filter grid 13 to the bottom of the filter channel 110. Next, the clamping drive slider 159 is driven by a servo motor of the prior art to move along the arc slide rail 158 through gear and rack transmission. The two clamping drive sliders 159 drive the two cleaning clamping plates 157 to move closer to each other, clamping the debris between the two cleaning clamping plates 157. Then the lifting drive slider 162 drives the lifting connecting shaft 155 and the pressing support plate 156 to move upward together, so that the cleaning clamping plate 157 holding the debris is moved out of the filter channel 110. Finally, the cleaning support slider 154 is driven by a conventional servo motor fixed on it to move along the support connecting slide groove 1530 via gear and rack transmission. The cleaning support slider 154, together with the lifting connecting shaft 155, the pressing support plate 156, and the cleaning clamping plate 157 holding the debris, moves away from the pretreatment container tank 11, and the cleaning clamping plate 157 holding the debris is suspended above the filter cake temporary storage box 150. The two clamping drive sliders 159 drive the two cleaning clamping plates 157 to move away from each other, so that the debris held between the two cleaning clamping plates 157 falls into the filter cake temporary storage box 150.

[0031] Example 7: Based on Example 5, such as Figure 7As shown, the magnetic separation column 34 is connected to the deep purification container tank 31 through the flocculation transfer mechanism 35. The flocculation transfer mechanism 35 includes a transfer support ring 351 that is set above the deep purification container tank 31 and extends vertically along its axis. A rotating support disk 352 is rotatably connected to the inner side of the transfer support ring 351. Multiple magnetic separation columns 34 are fixed to the bottom of the rotating support disk 352. The rotating support disk 352 is driven by a prior art servo motor fixed on the transfer support ring 351 to rotate around the vertical axis of the transfer support ring 351 via gear ring transmission; A lifting and fixing cylinder 353 with its opening facing upward is fixed on the outside of the deep purification containment tank 31. A lifting and fixing cylinder 354 is slidably connected inside the lifting and fixing cylinder 353. A vertically extending deflection connecting shaft 355 is fixed on the top of the lifting and fixing cylinder 354. A deflection connecting ring 356 is rotatably connected on the deflection connecting shaft 355. The deflection connecting ring 356 is fixedly connected to the transfer support ring 351 through the support connecting plate 357. The deflection connecting ring 356 is driven by a servo motor fixed on the lifting sliding cylinder 354 to rotate around the axis of the deflection connecting shaft 355 through gear transmission; The lifting fixed cylinder 353 is provided with a lifting drive rod 358 for driving the lifting sliding cylinder 354 to move up and down. The lifting drive rod 358 is an existing electric telescopic rod driven by a servo motor. The outer rod end of the lifting drive rod 358 is fixedly connected to the bottom of the lifting fixed cylinder 353, and the inner rod end of the lifting drive rod 358 is fixedly connected to the top of the lifting sliding cylinder 354. Next to the deep purification containment tank 31, there is an upward-facing flocculation storage tank 310; A grating ruler (not shown in the figure) for monitoring the relative position of the lifting sliding cylinder 354 and the lifting fixed cylinder 353 is provided between them. The scale grating of the grating ruler is fixed on the lifting sliding cylinder 354, and the grating reading head of the grating ruler is fixed on the lifting fixed cylinder 353. A grating ruler (not shown in the figure) for monitoring the relative position of the two is provided between the deflection connecting shaft 355 and the deflection connecting ring 356. The scale grating of the grating ruler is fixed on the deflection connecting ring 356, and the grating reading head of the grating ruler is fixed on the deflection connecting shaft 355.

[0032] Example 8: This example describes a graded wastewater treatment method based on a graded wastewater treatment device in Example 7. The difference from Example 6 is that in step S3, during the deep purification process, the rotating support disk 352 is driven by a prior art servo motor fixed on the transfer support ring 351 through gear ring transmission to rotate around the vertical axis of the transfer support ring 351. The rotating support disk 352 rotates periodically clockwise and counterclockwise, and the rotating support disk 352 in turn drives multiple magnetic separation columns 34 to rotate together, using the multiple magnetic separation columns 34 to stir the wastewater in the deep purification containment tank 31.

[0033] Example 9: Based on Example 7, as follows Figure 8 As shown, a filling support beam 37 is fixed on the outer wall of the deep purification container 31 and extends radially therein. A filling support slide rail 371 is fixed on the lower side of the filling support beam 37. A filling support slider 372 is slidably connected on the filling support slide rail 371. One end of the magnetic powder conveying pipe 33 located outside the deep purification container 31 is fixedly connected to the filling support slider 372. The filling support slider 372 is driven by a prior art servo motor fixed thereon to move along the filling support slide rail 371 via a gear and rack transmission.

[0034] Example 10: This example describes a graded sewage treatment method based on a graded sewage treatment device in Example 9 above. The difference from Example 8 is that in step S3, when adding ferromagnetic powder to the deep purification containment tank 31, the adding support slider 372 is driven by a prior art servo motor fixed on it to move along the adding support slide rail 371 through gear and rack transmission. The adding support slider 372 moves towards the deep purification containment tank 31, and the adding support slider 372 then drives the magnetic powder conveying pipe 33 to extend into the deep purification containment tank 31. After the ferromagnetic powder is added, the adding support slider 372 moves away from the deep purification container 31. The adding support slider 372 then drives the magnetic powder conveying pipe 33 to be pulled out from inside the deep purification container 31, so that the end of the magnetic powder conveying pipe 33 close to the deep purification container 31 is flush with the inner wall of the deep purification container 31.

[0035] Example 11: Based on Example 9, as follows Figure 9 As shown, a flocculation scraping ring 36 is slidably connected to the magnetic separation column 34, and multiple scraping lifting shafts 361 are slidably connected to the rotating support disk 352 along the vertical direction. The lower end of the scraping lifting shafts 361 is fixedly connected to each flocculation scraping ring 36 in a corresponding manner. Multiple vertically extending scraping support columns 362 are fixed on the top of the rotating support disk 352. Vertically extending scraping drive slide rails 363 are fixed on the scraping support columns 362. Scraping drive sliders 364 are slidably connected on the scraping drive slide rails 363. Each scraping drive slider 364 is fixedly connected to the upper end of each scraping lifting shaft 361. The scraping drive slider 364 is driven by a servo motor of the prior art to move along the scraping drive slide rail 363 via a gear and rack transmission.

[0036] Example 12: This example describes a graded sewage treatment method based on a graded sewage treatment device in Example 11 above. The difference from Example 10 is that in step S4, the flocs in the deep purification containment tank 31 are removed by the flocculation transfer mechanism 35, and the inner rod of the lifting drive rod 358 extends to drive the lifting sliding cylinder 354, the deflection connecting shaft 355, the deflection connecting ring 356, the transfer support ring 351, the rotating support disk 352, and the multiple magnetic separation columns 34 to move upward together, so that the lower end of the magnetic separation column 34 is higher than the top of the deep purification containment tank 31. The deflection connecting ring 356 is driven by a servo motor fixed on the lifting sliding cylinder 354 to rotate around the axis of the deflection connecting shaft 355 through gear transmission; the deflection connecting ring 356 then drives the transfer support ring 351, the rotating support disk 352 and multiple magnetic separation columns 34 to deflect together through the support connecting plate 357, so that the multiple magnetic separation columns 34 can be suspended above the flocculation storage tank 310; After the electromagnet 341 is de-energized, the scraping drive slider 364 is driven by a servo motor of the prior art to move along the scraping drive slide rail 363 through gear and rack transmission. The scraping drive slider 364 drives the scraping lifting shaft 361 and the flocculation scraping ring 36 to move down together. The flocculation scraping ring 36 scrapes off the flocs adsorbed on the outside of the magnetic separation column 34, so that the flocs fall into the flocculation storage pool 310 below.

[0037] Example 13: Based on Example 11, as follows Figure 11 As shown, a central support tube shell 45 is fixed inside the disinfection flow branch tube 43 and arranged coaxially therewith. A disinfection flow channel 430 is formed between the inner wall of the disinfection flow branch tube 43 and the outer wall of the central support tube shell 45. Both the disinfection flow branch tube 43 and the central support tube shell 45 are made of transparent glass. Multiple pulsed ultraviolet disinfection lamps 450 are fixed on the inner wall of the central support tube shell 45; The pulsed ultraviolet disinfection lamp 450 is a product of existing technology. For example, the Xylem WedecoLBX series pulsed ultraviolet disinfection lamp with square wave pulse technology can be used, model LBXe 1500, with a single lamp power of 285W and a wavelength of 200nm. Example 14: This example describes a graded wastewater treatment method based on a graded wastewater treatment device in Example 13 above. The difference from Example 12 is that in step S5, multiple pulsed ultraviolet disinfection lamps 450 are turned on. The pulse frequency of the pulsed ultraviolet disinfection lamps 450 is 5Hz. Under the continuous irradiation of the constant-on ultraviolet disinfection lamps 440 and the pulse irradiation of the pulsed ultraviolet disinfection lamps 450, the wastewater is disinfected in combination to ensure good wastewater disinfection effect.

[0038] Example 15: This example describes a graded wastewater treatment method. The difference from Example 14 is that the treatment time in step S2 is 5 hours.

[0039] Example 16: This example describes a graded wastewater treatment method. The difference from Example 14 is that the treatment time in step S2 is 10 hours.

[0040] Example 17: This embodiment describes a graded sewage treatment method. The difference from embodiment 16 is that the flow velocity of sewage in the disinfection flow branch pipe 43 is 0.2 m / s.

[0041] Example 18: This embodiment describes a graded sewage treatment method. The difference from embodiment 16 is that the flow velocity of sewage in the disinfection flow branch pipe 43 is 0.3 m / s.

Claims

1. A graded sewage treatment device, characterized in that, It includes a pretreatment unit (10), a membrane aeration biofilm reactor (20), a deep purification unit (30), and a disinfection unit (40) connected in sequence. The pretreatment mechanism (10) includes a pretreatment container (11) with the opening facing upward. A grid support ring (12) coaxial with the pretreatment container (11) is fixed inside the pretreatment container (11). A plurality of filter grids (13) are provided on the grid support ring (12) that flow radially thereon. A filtration channel (110) is formed between the inner wall of the pretreatment container (11) and the outer side of the grid support ring (12). The pretreatment container (11) is provided with multiple pretreatment input pipes (111) connected to the filter channel (110) on the outside. The deep purification mechanism (30) includes a deep purification container (31) with the opening facing upward. Multiple vertically extending flocculant delivery pipes (32) are fixed inside the deep purification container (31). Multiple flocculant nozzles (320) are provided on the flocculant delivery pipes (32). Multiple magnetic powder conveying pipes (33) are slidably provided on the side wall of the deep purification containment tank (31) along its radial direction, and the magnetic powder conveying pipes (33) have multiple magnetic powder discharge holes (330) on their lower side. The deep purification containment pool (31) is equipped with multiple magnetic separation columns (34). The magnetic separation columns (34) have a hollow structure inside, and multiple electromagnets (341) are fixed on the inner side wall of the magnetic separation columns (34). The disinfection mechanism (40) includes a disinfection housing (41), in which a disinfection input collection pipe (421) and a disinfection output collection pipe (422) are fixed in parallel arrangement, and multiple disinfection flow branch pipes (43) are connected between the disinfection input collection pipe (421) and the disinfection output collection pipe (422). The disinfection flow branch pipe (43) is fitted with a disinfection support tube shell (44) arranged coaxially with it, and a plurality of constantly lit ultraviolet disinfection lamps (440) are fixed on the inner side wall of the disinfection support tube shell (44).

2. The graded sewage treatment equipment according to claim 1, characterized in that, The pretreatment input pipe (111) is connected to the filter channel (110) through the pretreatment flow equalization mechanism (14). The pretreatment flow equalization mechanism (14) includes a plurality of input flow shells (141) fixed on the outer side wall of the pretreatment container (11). The side wall of the pretreatment container (11) has a plurality of input communication slots (142) that communicate with the inside of the input flow shells (141). Each of the preprocessing input tubes (111) is connected to each of the input flow shells (141) in a one-to-one correspondence; Each of the input flow shells (141) is rotatably connected to a plurality of parallel flow equalization support shafts (143), and an input flow guide plate (144) is fixed on the flow equalization support shafts (143). One end of the flow equalization support shaft (143) extends to the outside of the input flow housing (141), and two adjacent flow equalization support shafts (143) are connected by a synchronous belt (145). One of the flow equalization support shafts (143) is driven to rotate by a flow guide drive motor (146) fixed on the outer wall of the input flow housing (141) through gear transmission.

3. A graded sewage treatment device according to claim 1, characterized in that, The pretreatment containment tank (11) is provided with a grid cleaning mechanism (15) at the top. The grid cleaning mechanism (15) includes a cleaning support ring (151) fixed at the top of the pretreatment containment tank (11). A cleaning rotating ring (152) is rotatably connected to the cleaning support ring (151). A plurality of cleaning support beams (153) extending radially are fixed on the cleaning rotating ring (152). A cleaning support slider (154) is slidably connected to the cleaning support beam (153). A lifting connecting shaft (155) is slidably connected to the cleaning support slider (154) along the vertical direction. A lower pressure support plate (156) is fixed at the lower end of the lifting connecting shaft (155). Two cleaning clamping plates (157) are slidably connected to the bottom of the lower pressure support plate (156). The cleaning support beam (153) has a vertically penetrating support connection groove (1530) that extends radially along the cleaning rotating ring (152), and the cleaning support slider (154) is slidably connected in the support connection groove (1530). The bottom of the pressing support plate (156) is fixed with an arc-shaped slide rail (158), and two clamping drive sliders (159) are slidably connected on each arc-shaped slide rail (158). The two cleaning clamping plates (157) are fixed one-to-one on the bottom of the two clamping drive sliders (159). The top of the cleaning support slider (154) is fixed with a lifting support column (16), and the side of the lifting support column (16) is fixed with a vertically extending lifting support slide rail (161). A lifting drive slider (162) is slidably connected on the lifting support slide rail (161), and the lifting drive slider (162) is fixedly connected to the upper end of the lifting connecting shaft (155). Multiple filter residue storage boxes (150) with upward-facing openings are fixed on the outside of the pretreatment container (11).

4. A graded sewage treatment device according to claim 1, characterized in that, The magnetic separation column (34) is connected to the deep purification container tank (31) through the flocculation transfer mechanism (35). The flocculation transfer mechanism (35) includes a transfer support ring (351) arranged above the deep purification container tank (31) and extending vertically along its axis. A rotating support disk (352) is rotatably connected to the inner side of the transfer support ring (351). Multiple magnetic separation columns (34) are fixed at the bottom of the rotating support disk (352). The outer side of the deep purification containment tank (31) is fixed with an upward-facing lifting fixing cylinder (353), and a lifting sliding cylinder (354) is slidably connected inside the lifting fixing cylinder (353). A vertically extending deflection connecting shaft (355) is fixed at the top of the lifting sliding cylinder (354), and a deflection connecting ring (356) is rotatably connected to the deflection connecting shaft (355). The deflection connecting ring (356) is fixedly connected to the transfer support ring (351) through a support connecting plate (357). The lifting fixed cylinder (353) is provided with a lifting drive rod (358) for driving the lifting sliding cylinder (354) to move up and down. Next to the deep purification containment tank (31) is a flocculation storage tank (310) with its opening facing upwards.

5. A graded sewage treatment device according to claim 4, characterized in that, The magnetic separation column (34) is slidably connected to a flocculation scraping ring (36), and the rotating support disk (352) is slidably connected to multiple scraping lifting shafts (361) in the vertical direction. The lower ends of the scraping lifting shafts (361) are fixedly connected to each of the flocculation scraping rings (36). The top of the rotating support disk (352) is fixed with a plurality of vertically extending scraping support columns (362), and a vertically extending scraping drive slide rail (363) is fixed on the scraping support column (362). A scraping drive slider (364) is slidably connected on the scraping drive slide rail (363), and the scraping drive slider (364) is fixedly connected to the upper end of each scraping lifting shaft (361) in a one-to-one correspondence.

6. A graded sewage treatment device according to claim 1, characterized in that, The disinfection flow branch pipe (43) has a central support tube shell (45) arranged coaxially with it. A disinfection flow channel (430) is formed between the inner side wall of the disinfection flow branch pipe (43) and the outer side wall of the central support tube shell (45). Both the disinfection flow branch pipe (43) and the central support tube shell (45) are made of transparent glass. Multiple pulsed ultraviolet disinfection lamps (450) are fixed on the inner wall of the central support tube shell (45).

7. A graded sewage treatment device according to claim 1, characterized in that, An injection support beam (37) is fixed on the outer wall of the deep purification containment tank (31) and extends radially thereon. An injection support slide rail (371) is fixed on the lower side of the injection support beam (37). An injection support slider (372) is slidably connected on the injection support slide rail (371). One end of the magnetic powder conveying pipe (33) located outside the deep purification containment tank (31) is fixedly connected to the injection support slider (372).

8. A graded sewage treatment device according to claim 1, characterized in that, The bottom of the pretreatment container (11) is fixed with a vertically extending pretreatment drain pipe (112) located inside the grid support ring (12), and the lower end of the pretreatment drain pipe (112) extends downward to the outside of the pretreatment container (11). The pretreatment drain pipe (112) has multiple pretreatment drain holes (1120) that are connected inside and outside on one end side wall inside the pretreatment container (11). The lower end of the pretreatment outlet pipe (112) is connected to the input end of the membrane aeration biofilm reactor (20) through the first pipe (101), and the output end of the membrane aeration biofilm reactor (20) is connected to the interior of the deep purification containment tank (31) through the second pipe (201). The interior of the deep purification containment tank (31) is connected to the interior of the disinfection input and collection pipe (421) through a third pipe (301).

9. A graded wastewater treatment method, based on a graded wastewater treatment device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Preliminary filtration treatment: The wastewater to be treated is fed into the pretreatment container tank (11) through the pretreatment input pipe (111). After the wastewater enters the filter channel (110), it flows from the outside to the center. The wastewater passes through multiple filter grids (13) and enters the inner side of the grid support ring (12). The wastewater is filtered by the filter grids (13). S2, Biological purification treatment: The filtered wastewater is transferred to the membrane aeration biofilm reactor (20), where it undergoes simultaneous nitrification and denitrification treatment for 5 to 10 hours. S3, Deep purification treatment: After nitrification and denitrification treatment, the wastewater is transferred to the deep purification containment tank (31). Flocculant is introduced into the flocculant delivery pipe (32). The flocculant is sprayed from multiple flocculant nozzles (320) and mixed with the wastewater in the deep purification containment tank (31) to perform flocculation treatment on the wastewater and remove suspended solids from the wastewater. Ferromagnetic powder is fed into the magnetic powder conveying pipe (33). The ferromagnetic powder is discharged from the magnetic powder discharge hole (330) and falls into the deep purification containment tank (31). Ferromagnetic powder can accelerate flocculation and agglomeration and form flocs with a high specific gravity, which is conducive to the rapid settling of flocs. S4. Floc separation treatment: When the electromagnets (341) in the multiple magnetic separation columns (34) are energized, the flocs containing ferromagnetic powder will be adsorbed onto the outer surface of the magnetic separation column (34) under the attraction of the magnetic field, and the flocs in the sewage will be quickly separated. S5. Wastewater disinfection treatment: After the floc separation treatment, the sewage is transferred to the disinfection input summary pipe (421). The sewage in the disinfection input summary pipe (421) flows to the disinfection output summary pipe (422) through multiple disinfection flow branch pipes (43). During the flow of sewage in the multiple disinfection flow branch pipes (43), the constant-on ultraviolet disinfection lamp (440) is turned on to irradiate the sewage in the disinfection flow branch pipes (43) and disinfect the sewage using ultraviolet light. The flow velocity of wastewater in the disinfection and circulation branch pipe (43) is 0.1~0.3m / s; The wastewater after disinfection flows into the disinfection output collection pipe (422) to form clean water, and the clean water in the disinfection output collection pipe (422) is discharged through a pipe.

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