An activated carbon adsorption regeneration system applied to multi-stage sewage treatment

Abstract

This invention belongs to the field of wastewater treatment technology and discloses an activated carbon adsorption and regeneration system for multi-stage wastewater treatment. It includes a fixed shell and a movable shell coaxially arranged, with the movable shell sliding and sealed on the fixed shell via a lifting assembly. A first filter cylinder is horizontally rotatably connected to the top of the fixed shell, and a first sludge discharge assembly is provided at the top of its inner cavity. A second filter cylinder is vertically rotatably connected to the fixed shell, and a second sludge discharge assembly is provided at its top. The filtered residue is discharged from the fixed shell through the second sludge discharge assembly. An activated carbon adsorption assembly with an attached biofilm is provided inside the filtration chamber. Water filtered through the second filter cylinder is treated by the activated carbon adsorption assembly before being discharged. This invention has a compact structure, is easy to use and maintain, and treats wastewater through multi-stage filtration and activated carbon adsorption. During the filtration process, it automatically cleans and discharges the filtered residue, facilitating automated wastewater treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a kind of activated carbon adsorption regeneration system applied to multistage sewage treatment. BACKGROUND

[0002] Sewage filtration is an indispensable step in sewage treatment, filtration can filter out suspended solids in sewage, facilitate subsequent processing, prevent suspended solids from blocking subsequent equipment. The existing filter generally uses filter screen to filter, the suspended solids in water are intercepted by filter screen, and the remaining water and small particle suspended solids are discharged from the filter after passing through the filter screen and enter the next process.

[0003] In the existing sewage treatment technology, there are often many challenges. First, the traditional sewage treatment system often has complex structure, large floor area and high maintenance cost. Secondly, many sewage treatment systems lack flexibility and adjustability, and are difficult to adapt to different flow requirements of sewage filtration. Thirdly, the traditional filtration method often cannot effectively remove residues and suspended solids in sewage, resulting in certain problems in the quality of treated water. In addition, for deep adsorption treatment of organic matter, odor, pigment and the like, the traditional method is often low in efficiency, and the adsorption material needs to be frequently replaced, increasing the operating cost. Moreover, the existing sewage treatment is generally simple mechanical treatment or biological treatment, the treatment effect is single, and the treatment efficiency is insufficient. Finally, many sewage treatment systems cannot automatically clean and discharge the filtered residues during the treatment process, and need manual intervention, which affects the automation degree of sewage treatment.

[0004] Therefore, the present application designs an activated carbon adsorption regeneration system applied to multistage sewage treatment to solve the above technical problems. SUMMARY

[0005] The purpose of the present application is to provide an activated carbon adsorption regeneration system applied to multistage sewage treatment to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides an activated carbon adsorption regeneration system applied to multistage sewage treatment, comprising:

[0007] The shell comprises a fixed shell and a movable shell arranged coaxially, and the movable shell is sealed and slidably arranged at the bottom end of the inner cavity of the fixed shell through a lifting assembly;

[0008] The first filter cylinder is horizontally rotationally connected to the top end of the fixed shell, and a first residue discharge assembly is arranged at the top end of the inner cavity of the first filter cylinder, and the first residue discharge assembly is in sliding contact with the inner cavity of the first filter cylinder; the residues filtered out after the sewage from outside is sent into the first filter cylinder are discharged from the fixed shell through the first residue discharge assembly;

[0009] A second filter cylinder is vertically rotatably connected in the fixed shell, a top end of the second filter cylinder is provided with a second residue discharging assembly, water filtered by the first filter cylinder is subjected to centrifugal filtration in the second filter cylinder, and filtered residue is discharged from the fixed shell through the second residue discharging assembly.

[0010] A filter cavity is provided with an activated carbon adsorption assembly, a biological membrane assembly is arranged on the activated carbon assembly, and water filtered by the second filter cylinder is discharged after being treated by the activated carbon adsorption assembly.

[0011] Preferably, the first filter cylinder comprises two fixed plates arranged symmetrically, and the two fixed plates are fixedly connected to the inner cavity of the fixed shell at the ends away from each other; a filter screen is rotatably connected between the two fixed plates, and the filter screen is in transmission connection with a first driving assembly arranged at the top end of the fixed shell.

[0012] Preferably, the first residue discharging assembly comprises a residue discharging groove fixed between the two fixed plates, the top end of the residue discharging groove is open, a first cleaning plate is fixed to one side of the residue discharging groove in the rotating direction of the filter screen, and the end of the first cleaning plate is in sliding contact with the inner wall of the filter screen; a spiral conveyor is rotatably connected in the residue discharging groove to discharge the residue falling into the residue discharging groove.

[0013] Preferably, a plurality of reinforcing rods are rotatably connected between the two fixed plates at equal intervals in the axial direction, the filter screen is wound into a cylindrical shape and fixed between the reinforcing rods, and the two ends of the filter screen are sealingly and slidably connected to the fixed plates; a first driven gear is sleeved on the outer wall of the reinforcing rods, and the first driven gear is in transmission connection with the first driving assembly.

[0014] Preferably, a first supporting block is fixedly connected in the fixed shell below the first filter cylinder, an installation cavity is formed in the bottom end of the first supporting block, the second filter cylinder is rotatably connected in the installation cavity, the second residue discharging assembly is fixedly connected to the top end of the installation cavity and communicates with the inner cavity of the second filter cylinder, and a second driving assembly is arranged in the first supporting block to drive the rotation of the second filter cylinder.

[0015] Preferably, a driving cover in transmission connection with the second driving assembly is arranged at the top end of the second filter cylinder, and the driving cover is rotatably connected in the installation cavity; a plurality of residue discharging openings are formed in the side wall of the driving cover, and the residue discharging openings communicate with the second residue discharging assembly.

[0016] Preferably, a cleaning rod is rotatably connected in the second filter cartridge, and the cleaning rod is fixedly connected in the inner cavity of the fixed shell; a plurality of second cleaning plates arranged in an arc shape are fixedly connected on the outer wall of the cleaning rod in an equal interval in the axial direction, and the second cleaning plates are in sliding contact with the inner wall of the second filter cartridge.

[0017] Preferably, the second slag discharging assembly comprises an annular slag discharging plate fixedly connected in the mounting cavity, the inner ring of the annular slag discharging plate is in sealing sliding connection with the side wall of the driving cover, and the residue discharged through the slag discharging port falls on the annular slag discharging plate; the outer wall of the driving cover is fixedly connected with a push plate arranged correspondingly with the annular slag discharging plate, and the push plate discharges the residue on the annular slag discharging plate through a second residue discharging channel.

[0018] Preferably, the activated carbon adsorption assembly comprises a second supporting block fixedly connected at the bottom end of the fixed shell, a plurality of fixed activated carbon pipes arranged coaxially are fixedly connected at the bottom end of the second supporting block, and a plurality of movable activated carbon pipes arranged coaxially are arranged in the inner cavity of the movable shell, and the fixed activated carbon pipes are in dislocation sliding connection with the movable activated carbon pipes.

[0019] Preferably, a drainage cavity in communication with the outside is formed in the second supporting block, the bottom end of the drainage cavity is in communication with the outer wall at the top end of the filter cavity through a plurality of drainage holes, and a one-way valve for unidirectional opening of the drainage cavity is arranged in the drainage hole.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention discloses an activated carbon adsorption regeneration system for multi-stage wastewater treatment, which mainly consists of a shell, a first filter cylinder, a second filter cylinder, and a filter chamber. Through multi-stage filtration and activated carbon adsorption, it achieves effective wastewater treatment. The shell includes a fixed shell and a movable shell coaxially arranged and slidable vertically, facilitating maintenance, component replacement, or system status adjustment. Simultaneously, the volume of the filter chamber can be adjusted as needed to accommodate different flow rates of wastewater. The first filter cylinder is horizontally rotatably connected to the top of the fixed shell, and a first sludge discharge assembly is provided at the top of its inner cavity. Wastewater first enters the first filter cylinder for preliminary filtration, and the residue is discharged through the first sludge discharge assembly. The second filter cylinder is vertically rotatably connected inside the fixed shell. Water filtered by the first filter cylinder enters the second filter cylinder for centrifugal filtration to further remove residue, and the residue is automatically discharged through the second sludge discharge assembly. The wastewater then passes through the first filter cylinder and the second filter cylinder... The multi-stage filtration of the two filter cartridges effectively removes most of the residue and suspended solids from the wastewater, improving water quality. An activated carbon adsorption component is installed inside the filter chamber to treat the water filtered through the second filter cartridge. This component deeply adsorbs organic matter, odors, and pigments from the water, further improving water quality. A biofilm component is installed on the surface of the activated carbon component, utilizing microorganisms to form a biofilm on the solid medium surface. This microbial degradation of organic matter achieves wastewater purification, enhancing the treatment effect of the activated carbon adsorption component. During wastewater treatment, the wastewater is first sent to the first filter cartridge for preliminary filtration. Residue is discharged through the first sludge discharge component. The pre-filtered water then enters the second filter cartridge for centrifugal filtration to further remove residue, which is also discharged through the second sludge discharge component. The wastewater, after multiple filtrations, enters the filter chamber for deep purification through the activated carbon adsorption component. The treated water is then discharged from the system, meeting discharge standards or used for other purposes.

[0021] This invention features a compact structure, ease of use, and convenient maintenance. It treats wastewater through multi-stage filtration and activated carbon adsorption, automatically cleaning and discharging the filtered residue during the filtration process, thus facilitating automated wastewater treatment. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is an axial view of the activated carbon adsorption and regeneration system of the present invention applied to multi-stage wastewater treatment;

[0024] Figure 2 This is a schematic diagram of the activated carbon adsorption and regeneration system of the present invention applied to multi-stage wastewater treatment;

[0025] Figure 3 For the present invention Figure 2 A magnified view of part A in the image;

[0026] Figure 4 This is a top view of the second slag discharge assembly of the present invention;

[0027] Figure 5 This is an axial view of the filter cavity of the present invention;

[0028] Figure 6 This is a schematic diagram of the cross-section of the filter cavity of the present invention;

[0029] Figure 7 This is a schematic diagram of the first filter cartridge structure of the present invention;

[0030] Figure 8 For the present invention Figure 7 A magnified view of part B in the image;

[0031] Figure 9 This is a cross-sectional schematic diagram of the slag discharge trough of the present invention;

[0032] Figure 10 For the present invention Figure 9 Local method diagram in C;

[0033] Figure 11 For the present invention Figure 2 A local method diagram of D;

[0034] In the diagram: 1. Shell; 2. First filter cylinder; 3. Second filter cylinder; 4. Filter chamber; 11. Fixed shell; 12. Movable shell; 13. First support block; 14. Second support block; 15. Mounting cavity; 16. Support foot; 17. Support ring; 18. Guide section; 19. Lifting motor; 110. Lifting screw; 21. Fixed plate; 22. Positioning rod; 23. Filter screen; 24. Slag discharge trough; 25. First cleaning plate; 26. Drain hole; 27. Screw conveyor; 28. Slag discharge cylinder; 29. ​​First slag discharge channel; 210. Water inlet pipe; 211. Reinforcing rod; 212. First driven gear; 13. First drive gear; 214. First drive motor; 215. Protective cover; 31. Second drive motor; 32. Second drive gear; 33. Second driven gear; 34. Drive cover; 35. Slag outlet; 36. Cleaning rod; 37. Second cleaning plate; 38. Annular slag outlet plate; 39. Push plate; 310. Second slag discharge channel; 311. Fixing frame; 312. Barrier layer; 313. Support plate; 314. Ozone circulating fluidized bed; 41. Fixed activated carbon tube; 42. Movable activated carbon tube; 43. Drainage chamber; 44. Drainage hole; 45. One-way valve; 46. Drainage pipe; 47. Biofilm. Detailed Implementation

[0035] 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.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-10 As shown, this embodiment provides an activated carbon adsorption and regeneration system for multi-stage wastewater treatment, comprising:

[0038] The housing 1 includes a fixed housing 11 and a movable housing 12 arranged coaxially. The movable housing 12 is sealed and slidably at the bottom of the inner cavity of the fixed housing 11 by a lifting assembly.

[0039] The first filter cylinder 2 is horizontally rotatably connected to the top of the fixed shell 11 body 1. The top of the inner cavity of the first filter cylinder 2 is provided with a first slag discharge assembly, which slides in contact with the inner cavity of the first filter cylinder 2. After the external sewage is sent into the first filter cylinder 2, the filtered residue is discharged from the fixed shell 11 through the first slag discharge assembly.

[0040] The second filter cylinder 3 is vertically rotatably connected inside the fixed shell 11. The top of the second filter cylinder 3 is provided with a second slag discharge assembly. The water filtered by the first filter cylinder 2 enters the second filter cylinder 3 for centrifugal filtration, and the filtered residue is discharged from the fixed shell 11 through the second slag discharge assembly.

[0041] The filter chamber 4 is equipped with an activated carbon adsorption component, and a biofilm component is installed on the activated carbon component. The water filtered through the second filter cylinder 3 is treated by the activated carbon adsorption component and then discharged.

[0042] This invention discloses an activated carbon adsorption and regeneration system for multi-stage wastewater treatment, mainly composed of a shell 1, a first filter cylinder 2, a second filter cylinder 3, and a filter chamber 4. Through multi-stage filtration and activated carbon adsorption, it achieves effective wastewater treatment. The shell 1 includes a fixed shell 11 and a movable shell 12 coaxially arranged and slidable vertically, facilitating maintenance, component replacement, or system status adjustment. Simultaneously, the volume of the filter chamber 4 can be adjusted as needed to accommodate different wastewater flow rates. The first filter cylinder 2 is horizontally rotatably connected to the top of the fixed shell 11, with a first sludge discharge assembly at the top of its inner cavity. Wastewater first enters the first filter cylinder 2 for preliminary filtration, and the residue is discharged through the first sludge discharge assembly. The second filter cylinder 3 is vertically rotatably connected inside the fixed shell 11. Water filtered by the first filter cylinder 2 enters the second filter cylinder 3 for centrifugal filtration to further remove residue, and the residue is automatically discharged through the second sludge discharge assembly. The water then passes through the first filter cylinder 2 and the second filter cylinder 3. This multi-stage filtration system effectively removes most of the residue and suspended solids from wastewater, improving water quality. Activated carbon adsorption components are installed in the filter chamber 4 to treat the water filtered through the second filter cylinder 3. These components deeply adsorb organic matter, odors, and pigments, further improving water quality. A biofilm component is installed on the surface of the activated carbon component, allowing microorganisms to form a biofilm on the solid medium surface. This microbial degradation of organic matter purifies the wastewater, enhancing the treatment effect of the activated carbon adsorption components. During wastewater treatment, the wastewater is first sent to the first filter cylinder 2 for preliminary filtration. Residue is discharged through the first slag discharge component. The pre-filtered water then enters the second filter cylinder 3 for centrifugal filtration to further remove residue, which is also discharged through the second slag discharge component. The wastewater, after multiple filtrations, enters the filter chamber 4 for deep purification through the activated carbon adsorption components. The treated water is then discharged from the system, meeting discharge standards or used for other purposes. This invention features a compact structure, ease of use, and simple maintenance. It treats wastewater through multi-stage filtration and activated carbon adsorption, automatically cleaning and discharging the filtered residue during the filtration process, facilitating automated wastewater treatment.

[0043] Specifically, wastewater first enters the horizontally rotating first filter cylinder 2, where the filter screen intercepts large particles of impurities. During rotation, residue is continuously scraped off and discharged by the slag discharge component. The pre-filtered water flows into the vertically placed second filter cylinder 3 below. The centrifugal force generated by high-speed rotation causes fine particles to adhere to the cylinder wall, which are periodically removed through the top slag discharge port 35. After two stages of filtration, the water enters the activated carbon adsorption zone. The fixed pipe and the movable block form a dynamic adsorption interface. After pollutants are captured by the activated carbon, the clean water flows out from the drain outlet. Simultaneously, the biofilm component on the activated carbon adsorption component utilizes microorganisms to form a biofilm on the surface of the solid carrier, removing pollutants such as organic matter, nitrogen, and phosphorus from the wastewater through biodegradation. Compared with existing technologies, traditional single-stage filters require manual cleaning and cannot classify and treat different particles. This solution achieves stratified removal of impurities through a two-stage filtration structure. Existing equipment requires a complete shutdown when replacing the filter screen, while the partial lifting design of the movable shell 12 allows for maintenance of specific components during operation. The combination of centrifugal filtration and slag discharge by the pusher plate 39 replaces the traditional backwashing method, significantly reducing water consumption. Through the above technical solution, this application achieves continuous operation of multi-stage filtration and adsorption treatment of wastewater. Two-stage filter cartridges remove impurities of different particle sizes, reducing the load on individual filter screens. The combination of the movable shell 12 body 1 and the liftable components allows for equipment maintenance without complete shutdown, while the activated carbon module dynamically adjusts to enhance adsorption efficiency. Centrifugal force-assisted slag discharge reduces the frequency of manual intervention, and the overall system improves treatment capacity while reducing operation and maintenance costs.

[0044] In one embodiment of the present invention, a support foot 16 is fixedly connected to the bottom outer wall of the fixed shell 11, and a guide section 18 corresponding to the lifting range of the movable shell 12 is provided on the support foot 16. The support ring 17 at the bottom of the movable shell 12 is slidably connected to the guide section 18 to limit the lifting of the movable shell 12.

[0045] In one embodiment of the present invention, a plurality of lifting motors 19 are provided on the fixed shell 11. The output end of the lifting motor 19 is connected to a lifting screw 110. The lifting screw 110 passes through the support ring 17 and is threadedly connected to the support ring 17. The support ring 17 drives the movable shell 12 to slide up and down at the bottom end of the fixed shell 11.

[0046] Further optimizing the design, the first filter cylinder 2 includes two symmetrically arranged fixed plates 21. The ends of the two fixed plates 21, which are far apart from each other, are fixed to the inner cavity of the fixed shell 11 via positioning rods 22. A filter screen 23 is rotatably connected between the two fixed plates 21, and the filter screen 23 is connected to a first drive assembly located at the top of the fixed shell 11. The fixed plates 21 are fixed on both sides of the inner cavity of the fixed shell 11 to provide a mounting base for the filter screen 23. The filter screen 23 is located between the two fixed plates 21 and is rotatably connected to the fixed plates 21 via bearings, used to intercept solid particles in the wastewater. The first drive assembly drives the filter screen 23 to rotate, accelerating filtration and assisting in the discharge of residue, causing the residue attached to the surface of the filter screen 23 to leave the filtration area with the direction of rotation. Specifically, after wastewater enters the first filter cylinder 2 through the inlet pipe 210, it undergoes solid-liquid separation through the rotating filter screen 23. Solid particles are intercepted on the inner surface of the filter screen 23. When the drive assembly drives... When the filter screen 23 rotates, the fixed plate 21 remains stationary. As the filter screen 23 continues to rotate, the residue attached to the screen surface is guided to the slag discharge trough 24 area, scraped off by the first cleaning plate 25, and discharged by the screw conveyor 27. This allows filtration and slag discharge to proceed simultaneously, avoiding efficiency loss caused by downtime for cleaning. It solves the problem of decreased filtration efficiency due to filter screen clogging and enables continuous operation. During wastewater treatment, the filter screen 23 achieves self-cleaning, eliminating the need for manual cleaning, reducing equipment maintenance frequency, and ensuring the stability of filtration efficiency, thus avoiding fluctuations in processing capacity due to downtime.

[0047] Further optimizing the scheme, the first slag discharge component includes a slag discharge trough 24 fixed between two fixed plates 21. The top of the slag discharge trough 24 is open. A first cleaning plate 25 is fixed to the side of the slag discharge trough 24 located in the rotation direction of the filter screen 23. The end of the first cleaning plate 25 slides in contact with the inner wall of the filter screen 23. A screw conveyor 27 is rotatably connected inside the slag discharge trough 24 to discharge the residue falling into the slag discharge trough 24. The slag discharge trough 24 has a U-shaped trough structure, with the length of the trough parallel to the axial direction of the filter screen 23. Several drainage holes 26 are provided at the bottom of the slag discharge trough 24 to drain excess water. The first cleaning plate 25 is used to scrape off the adhering substances on the inner wall of the filter screen 23. It can be implemented by using a rubber pusher plate 39 or a metal scraper, and its edge maintains line contact with the filter screen 23. The screw conveyor 27 is used to squeeze and discharge the collected residue. Specifically, when the filter screen 23 rotates under the drive of the drive component, the solid particles adhering to the mesh are moved to the outlet along with the filter screen 23. In the slag trough 24 area, the edge of the first cleaning plate 25 maintains continuous contact with the inner wall of the filter screen 23, scraping away solid particles embedded in the mesh and guiding them into the open slag discharge trough 24. The screw conveyor 27 rotates at a set speed inside the slag discharge trough 24, and its blades push the solid particles deposited at the bottom of the trough axially to the slag discharge port, realizing continuous slag discharge operation. Self-cleaning can be completed without interrupting the operation of the filter screen 23. The residue removal and filtration operation are carried out simultaneously, avoiding the equipment maintenance pressure caused by manual cleaning and ensuring the continuous and stable operation of the sewage treatment process.

[0048] In one embodiment of the present invention, the residue removal efficiency is dynamically matched with the rotation speed of the filter screen 23, effectively preventing the filtration performance from declining due to mesh clogging.

[0049] In one embodiment of the present invention, the spacing between the spiral blades of the spiral conveyor 27 gradually decreases in the discharge direction, gradually squeezing the residue and removing excess water.

[0050] In one embodiment of the present invention, the inlet pipe 210 is installed on any fixed plate 21 for feeding wastewater to be treated into the first filter cartridge 2.

[0051] In one embodiment of the present invention, a slag discharge cylinder 28 is connected to a fixed plate 21 away from the water inlet pipe 210, which is correspondingly provided and connected to the slag discharge trough 24. The screw conveyor 27 extends into the slag discharge cylinder 28 to send the residue of the slag discharge trough 24 into the slag discharge cylinder 28 and discharge it from the fixed shell 11. Then, it is guided to the recycling position through the first slag discharge channel 29.

[0052] In a further optimized design, several axially spaced reinforcing rods 211 are rotatably connected between the two fixed plates 21. The filter screen 23 is rolled into a cylindrical shape and fixed between the reinforcing rods 211, with both ends of the filter screen 23 respectively sealingly sliding against the fixed plates 21. A first driven gear 212 is sleeved on the outer wall of the reinforcing rods 211, and the first driven gear 212 is connected to the first drive assembly. The reinforcing rods 211 are arranged between the two fixed plates 21 to provide radial support for the cylindrical filter screen 23 and transmit rotational driving force, thereby ensuring that the filter screen 23 is subjected to uniform force. The first driven gear 212 transmits power to the reinforcing rods 211 to drive the filter screen 23 to rotate. When the first drive assembly drives the reinforcing rods 211 to rotate through the first driven gear 212, the cylindrical filter screen 23 wound on the reinforcing rods 211 rotates accordingly.

[0053] In one embodiment of the present invention, the first driving component includes a first driving motor 214 fixedly mounted on the top of the fixed housing 11. The output end of the first driving motor 214 drives the first driven gear 212 to rotate through the first driving gear 213, thereby driving the rotation of the first filter cartridge 2.

[0054] In one embodiment of the present invention, a protective cover 215 is provided at the top of the fixed shell 11 to protect the exposed first drive motor 214 and improve safety.

[0055] In a further optimized design, a first support block 13 is fixedly connected inside the fixed shell 11, located below the first filter cylinder 2. An installation cavity 15 is formed at the bottom of the first support block 13. The second filter cylinder 3 is rotatably connected within the installation cavity 15. A second slag discharge assembly is fixedly connected to the top of the installation cavity 15 and communicates with the inner cavity of the second filter cylinder 3. A second drive assembly for driving the rotation of the second filter cylinder 3 is provided inside the first support block 13. The first support block 13 is located inside the fixed shell 11 and below the first filter cylinder 2, providing a stable mounting base for the second filter cylinder 3. The installation cavity 15 is formed at the bottom of the first support block 13, accommodating the second filter cylinder 3 and providing space for its rotation, preventing residue leakage. The second drive assembly is located inside the first support block 13, driving the second filter cylinder 3 to rotate for centrifugal filtration. After preliminary filtration by the first filter cylinder 2, the wastewater flows downwards into the second filter cylinder 3. Driven by the second drive assembly, the second filter cylinder 3 continuously rotates, separating the residue in the water through centrifugal force and throwing it towards the cylinder wall. The separated residue is discharged through the second slag discharge assembly, while the filtered water enters the subsequent treatment stage; the installation cavity 15 provides a sealed space for the rotational movement of the second filter cylinder 3.

[0056] In one embodiment of the present invention, the top of the first support block 13 is configured as a groove that slopes downward toward the center, so as to facilitate the water collection into the second filter cylinder 3 and avoid water accumulation.

[0057] In a further optimized design, a drive cover 34, which is connected to the second drive assembly, is located at the top of the second filter cylinder 3. The drive cover 34 is rotatably connected in the mounting cavity 15. Several slag outlets 35 are provided on the side wall of the drive cover 34, and these outlets 35 communicate with the second slag discharge assembly. The drive cover 34 covers the top of the second filter cylinder 3 and establishes a power transmission relationship with the second drive assembly, thereby driving the second filter cylinder 3 to rotate. The slag outlets 35 are located on the side wall of the drive cover 34, and during the rotation of the drive cover 34, the residue is periodically discharged into the second slag discharge assembly. When the drive cover 34 is driven to rotate by the second drive assembly, the second filter cylinder 3 rotates synchronously. The residue adhering to the inner wall of the second filter cylinder 3 is thrown to the side wall area under the action of centrifugal force, and then enters the interior of the second slag discharge assembly through the slag outlets 35. The centrifugal force generated by the operation of the equipment itself is used to achieve continuous discharge of residue without interrupting the filtration operation.

[0058] In one embodiment of the present invention, the second drive assembly includes a second drive motor 31 fixedly installed in the first support block 13. The output end of the second drive motor 31 is connected to a second drive gear 32. The second drive gear 32 meshes with a second driven gear 33 disposed on the drive cover 34 to drive the second filter cartridge 3.

[0059] Further optimizing the design, a cleaning rod 36 is rotatably connected inside the second filter cylinder 3, and the cleaning rod 36 is fixedly connected to the inner cavity of the fixed shell 11. Several second cleaning plates 37 arranged in an arc shape are axially and evenly fixed to the outer wall of the cleaning rod 36, and the second cleaning plates 37 slide in contact with the inner wall of the second filter cylinder 3. The cleaning rod 36 is fixed inside the fixed shell 11 by a fixing bracket 311, extending into the second filter cylinder 3 and rotatably connected to it, providing fixed support for the cleaning device. The second cleaning plates 37 are arc-shaped push plates 39 evenly distributed axially on the outer wall of the cleaning rod 36, and are arranged in a spiral shape longitudinally. Through sliding contact, they scrape off residue and push it upwards for easy discharge from the slag outlet 35. When the second filter cylinder 3 rotates during centrifugal filtration, the fixedly connected cleaning rod 36 remains stationary. As the filter cartridge 3 rotates, the arc-shaped second cleaning plate 37 continuously slides in contact with the inner wall of the filter cartridge, gradually scraping off the residue adhering to the inner wall. The scraped residue is pushed up by centrifugal force and the spiral-shaped second cleaning plate 37 and discharged through the slag outlet 35. The entire process can complete the real-time cleaning of the inner wall of the filter cartridge without stopping the machine. It achieves automatic removal of residue without affecting the continuity of filtration operations, solving the problems of equipment operation interruption and excessive maintenance frequency, maintaining the filtration efficiency of the second filter cartridge 3, and reducing the workload of equipment maintenance.

[0060] The scheme is further optimized. The second slag discharge component includes an annular slag discharge plate 38 fixedly connected in the installation cavity 15. The inner ring of the annular slag discharge plate 38 is slidably sealed with the side wall of the drive cover 34. The residue discharged through the slag discharge port 35 falls onto the annular slag discharge plate 38. The outer wall of the drive cover 34 is fixedly connected with a push plate 39 corresponding to the annular slag discharge plate 38. The push plate 39 discharges the residue on the annular slag discharge plate 38 through the second slag discharge channel 310. An annular slag discharge plate 38 is axially arranged around the drive cover 34 to receive the residue thrown out of the slag discharge port 35 of the drive cover 34 after centrifugal filtration. The pusher plate 39 is a scraping component fixed to the outer wall of the drive cover 34. Its radial extension length covers the width range of the annular slag discharge plate 38. During rotation, it pushes the residue deposited on the annular slag discharge plate 38 to move and pushes it into the second slag discharge channel 310 for discharge. Specifically, during the rotation of the second filter cylinder 3, the material containing residue is thrown out through the slag discharge port 35 on the side wall of the drive cover 34 to the surface of the annular slag discharge plate 38. The pusher plate 39 rotates synchronously with the drive cover 34, and its arc-shaped edge keeps in contact with the surface of the annular slag discharge plate 38, pushing the deposited residue circumferentially along the annular slag discharge plate 38 and discharging it through the second slag discharge channel 310, thus realizing the continuous discharge of residue.

[0061] In one embodiment of the present invention, an anti-seepage layer 312 is provided inside the mounting cavity 15, and an annular support plate 313 is provided outside the support frame 311. The anti-seepage layer 312 is stacked on the support plate 313, and a cavity adapted to the second filter cartridge 3 is provided on the anti-seepage layer 312. When the second filter cartridge 3 rotates and centrifuges, the separated water falls into the cavity, and then falls through the filter of the anti-seepage layer 312 and through the porous support plate 313 to the top of the second support block 14, and then is conveniently transferred to the concave activated carbon adsorption assembly.

[0062] In one embodiment of the present invention, the impermeable layer 312, based on the technology for the migration and prevention of heavy metals in heterogeneous soils, selects soils with different structures and different combinations of indicators. Combined with wastewater infiltration and chemical analysis of the content of pollutants such as nutrients, salts, and heavy metals in the silted sand matrix and wastewater, the effect of cement embedded in the sand matrix on the infiltration volume, some pollutants in the water, especially heavy metals, and the impact of heavy metal migration in the soil is analyzed. Specifically, different soils, different bulk densities, and different combinations of infiltration matrices are selected. Fine-grained materials such as fly ash, fine-grained clay, cement particles, and blast furnace slag are selected as candidate impermeable fine-grained materials. Under the same infiltration method, the impermeability of the cement embedded in the soil matrix on wastewater infiltration is compared. Then, cement, which has a significant impermeability effect and is easy to operate, is selected as the impermeable material. Further, combined with wastewater infiltration, the effect of cement embedded in the soil matrix on the impermeability and migration of heavy metals and related pollutants in wastewater is explored. It is found that cement embedded in the soil matrix has a significant impermeability effect on heavy metals and other pollutants in wastewater.

[0063] In one embodiment of the present invention, an ozone circulating fluidized bed 314 is provided in the cavity, and the ozone circulating fluidized bed 314 is used as a reactor, and activated carbon fiber supported Ni / Fe-LDH composite material is used as a catalyst to effectively degrade the main pollutants in the wastewater.

[0064] In one embodiment of the present invention, the ozone circulating fluidized bed 314 uses carbon fiber (ACF) as the raw material and different transition metal inorganic and organic salts as precursors. It employs impregnation adsorption, in-situ reduction / precipitation, and anaerobic calcination to load transition metals Ni and Fe, and incorporates LDH to prepare modified ACF-loaded transition metals with different Ni / Fe ratios and novel ACF composite materials with different structures. This achieves efficient and low-consumption treatment of recalcitrant organic matter in wastewater, reduces treatment costs, promotes industrial upgrading, and improves economic efficiency. It also lays the experimental and theoretical foundation for the large-scale application of ozone advanced oxidation in wastewater treatment.

[0065] In one embodiment of the present invention, the following conclusions were drawn from experiments: fine particulate matter embedded in riverbed silt can significantly reduce the infiltration capacity of water in the soil matrix; in the comparison of the seepage blocking effects of several fine particulate materials, it was found that cement embedded in the soil has the best seepage blocking effect and is an ideal seepage blocking particle that combines economy and practicality; cement embedded in the soil matrix can achieve a stable infiltration rate blocking effect of about 35% on soil water; cement embedded in the soil matrix also has a certain blocking effect on infiltrated water and some pollutants, including heavy metals. The cement has a significant effect on blocking heavy metals in wastewater. Many factors influence the infiltration reduction effect of cement in riverbed silt and sand, including the initial water head at cement infiltration, the interval between cement infiltration and infiltration water supply, the bulk density of the soil matrix, the texture of the surface soil matrix, and the amount of cement infiltrated. For heterogeneous soils, once the infiltrated water penetrates the infiltration column, the heterogeneous structure does not significantly affect the infiltration rate. The condition of the isolation layer formed by the bonding between the gel material and the upper soil layer plays a decisive role in the infiltration blocking effect. Based on experiments, this project conducted a detailed mechanistic analysis of the experimental results and phenomena. Experiments have shown that adding fine cement particles to the soil matrix before or during soil water infiltration, allowing these particles to infiltrate the soil matrix, has a significant infiltration blocking effect, especially on loosely structured sandy soils. It also has a significant blocking effect on heavy metals and other pollutants in wastewater, making it an effective measure to control and prevent the downward migration of heavy metals.

[0066] In one embodiment of the present invention, the pusher plate 39 is an arc-shaped plate inclined in the direction of rotation, which can apply an outward squeezing force to the residue, so as to push the residue into the second slag discharge channel 310.

[0067] In one embodiment of the present invention, the second slag discharge channel 310 is connected to the first slag discharge channel 29 to facilitate the joint processing of residues.

[0068] In one embodiment of the present invention, the top of the second support block 14 is configured as a groove that slopes downward toward the center, so as to facilitate the water to flow into the filter chamber 4 and avoid water accumulation.

[0069] Further optimization of the scheme: the activated carbon adsorption assembly includes a second support block 14 fixed to the bottom of the fixed shell 11. Several coaxially arranged fixed activated carbon tubes 41 are fixed to the bottom of the second support block 14. Several coaxially arranged movable activated carbon tubes 42 are arranged in the inner cavity of the movable shell 12. The fixed activated carbon tubes 41 and movable activated carbon tubes 42 are slidably connected in a staggered manner. The second support block 14 is installed at the bottom of the fixed shell 11 to support the fixed activated carbon tubes 41, ensuring stable installation of the activated carbon assembly. Several fixed activated carbon tubes 41 are coaxially fixed to the bottom of the second support block 14 to form water flow channels. Several movable activated carbon tubes are arranged in the inner cavity of the movable shell 12 and cooperate with the fixed activated carbon tubes 41. A lifting component is used to achieve relative displacement with the fixed activated carbon tubes 41, forming a dynamically coordinated adsorption interface, while simultaneously adjusting the dimensions of the filter chamber 4. When wastewater enters the filter chamber 4 after pre-filtration, the water flows sequentially through the staggered channels formed by the fixed activated carbon tubes 41 and movable activated carbon tubes 42. During the process of the lifting component driving the movable shell 12 to move up and down, the movable activated carbon tube 42 and the fixed activated carbon tube 41 generate axial relative displacement, causing the contact surface between the two to continuously change, so that the saturated activated carbon area can be replaced, while the underutilized activated carbon area is exposed to the water flow.

[0070] In one embodiment of this application, the biofilm assembly includes a biofilm 47 attached to and grown on the surfaces of a fixed activated carbon tube 41 and a movable activated carbon tube 42. Microorganisms attach to the solid surface, forming a biologically active membrane layer. This membrane can adsorb and degrade organic matter and is mainly composed of microorganisms such as bacteria, fungi, algae, and protozoa. The biofilm 47 significantly improves wastewater treatment efficiency, reduces pollutant discharge concentration, provides a stable growth environment for microorganisms, enhances microbial activity and diversity, and improves biological treatment effects. Compared with traditional treatment methods, biofilm technology has lower energy consumption and chemical reagent consumption, can further improve treatment capacity and stability, reduce operating costs, and can recover and utilize useful substances in wastewater, achieving resource utilization. These substances can be further processed for use as fertilizer or energy. It is highly adaptable and can be adjusted and optimized for different water quality characteristics. It is also easy to automate management, reducing labor costs.

[0071] In one embodiment of the present invention, the biofilm 47 can be used to construct a biofilter in an activated carbon adsorption module. Through the metabolic action of microorganisms, pollutants such as organic matter and ammonia nitrogen in wastewater are removed. It has the advantages of simple structure, convenient operation, and high treatment efficiency. At the same time, the biofilm 47 can increase the concentration and activity of microorganisms, enhance the stability of wastewater treatment, and keep the biofilm 47 in a fluidized state. The wastewater and the biofilm 47 are in full contact, resulting in high treatment efficiency. It is suitable for various types of wastewater, including domestic sewage, industrial wastewater, and agricultural wastewater. For different water quality characteristics, biofilm technology can selectively cultivate suitable microorganisms and effectively remove harmful substances in wastewater.

[0072] In one embodiment of this application, biofilm technology has the following main functions in wastewater treatment:

[0073] Organic matter removal: Microorganisms (such as bacteria and fungi) in biofilms can decompose organic matter (such as BOD and COD) in wastewater, converting it into carbon dioxide, water and microbial cell matter, thereby effectively reducing the organic pollution load of wastewater.

[0074] Nitrogen removal function: Biofilms contain microbial communities with different functions that can carry out nitrification and denitrification reactions. Nitrifying bacteria convert ammonia nitrogen into nitrate or nitrite, while denitrifying bacteria reduce nitrate to nitrogen gas under anaerobic conditions, thereby achieving nitrogen removal.

[0075] Phosphorus removal function: Some microorganisms (such as polyphosphate-accumulating bacteria) take up excessive phosphorus under aerobic conditions and release phosphorus under anaerobic conditions. Phosphorus can be removed from the system by sludge discharge, thus achieving the effect of phosphorus removal.

[0076] Strong resistance to shock loads: The biofilm has a stable structure and a rich variety of microorganisms, making it highly adaptable to fluctuations in water quality and quantity and less prone to failure due to changes in influent water quality.

[0077] Low sludge production: Compared with the activated sludge process, microorganisms in biofilm technology grow by attaching to the carrier and are not easily lost, resulting in relatively less sludge production and reducing sludge treatment costs.

[0078] Small footprint: Biofilm reactors typically have high volumetric loading and treatment efficiency, thus reducing reactor volume and saving floor space, making them suitable for areas with limited land resources.

[0079] Stable operation and convenient management: Biofilm systems are stable in operation, have strong shock resistance, and are relatively simple to operate and manage. They are suitable for small and medium-sized sewage treatment facilities and also applicable to decentralized sewage treatment.

[0080] It can treat recalcitrant organic matter: biofilms contain a variety of microorganisms, some of which have the ability to degrade recalcitrant organic matter (such as phenols, dyes, etc.), making them suitable for treating industrial wastewater.

[0081] In one embodiment of this application, the outer diameter of the movable activated carbon tube 42 is slightly smaller than the inner diameter of the fixed activated carbon tube 41, and the gap between the two can be controlled within the range of 1-3 mm. When the movable shell 12 is in the highest position, the movable activated carbon tube 42 is completely inserted into the fixed activated carbon tube 41 to form a tight fit. When the movable shell 12 descends, the fit area between the two gradually decreases, forming a gradual adsorption interface.

[0082] In a further optimized design, a drainage chamber 43 communicating with the outside is provided inside the second support block 14. The bottom end of the drainage chamber 43 is connected to the outer wall of the top of the filter chamber 4 through several drainage holes 44. A one-way valve 45 that opens to the drainage chamber 43 is provided in the drainage hole. The drainage chamber 43 is located inside the second support block 14 and connected to the external drainage pipe 46. It is used to collect water treated by activated carbon and guide it to be discharged outward. The drainage hole 44 connects the drainage chamber 43 and the top of the filter chamber 4. The one-way valve 45 is a valve structure that only allows fluid to flow from the filter chamber 4 to the drainage chamber 43, preventing water in the drainage chamber 43 from flowing back into the filter chamber 4. After the water treated by activated carbon adsorption is purified in the filter chamber 4, it enters the drainage chamber 43 from the top of the filter chamber 4 through the drainage hole 44. The purified water flows into the drainage chamber 43 along the drainage hole 44 and is finally discharged. When the internal pressure of the system fluctuates or the external pipeline pressure is abnormal, the one-way valve 45 automatically closes to block the reverse flow, preventing untreated water or pollutants from seeping back into the activated carbon component area. This achieves the dual functions of directional discharge of treated water and backflow prevention, maintaining the continuous operation of the filtration system without shutting down the system. It avoids activated carbon layer pollution caused by pressure fluctuations, reduces the impact of maintenance on system operation, and extends the effective service life of the activated carbon component.

[0083] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An activated carbon adsorption and regeneration system for multi-stage wastewater treatment, characterized in that, include: The housing (1) includes a fixed housing (11) and a movable housing (12) arranged coaxially. The movable housing (12) is sealed and slidably at the bottom of the inner cavity of the fixed housing (11) by a lifting assembly. The first filter cylinder (2) is horizontally rotatably connected to the top of the fixed shell (11) body (1). The top of the inner cavity of the first filter cylinder (2) is provided with a first slag discharge assembly. The first slag discharge assembly slides in contact with the inner cavity of the first filter cylinder (2). The residue filtered out after the sewage from the outside is sent into the first filter cylinder (2) is discharged from the fixed shell (11) through the first slag discharge assembly. The second filter cylinder (3) is vertically rotatably connected to the fixed shell (11) body (1). The top of the second filter cylinder (3) is provided with a second slag discharge assembly. The water filtered by the first filter cylinder (2) enters the second filter cylinder (3) for centrifugal filtration, and the filtered residue is discharged from the fixed shell (11) through the second slag discharge assembly. The filter chamber (4) is equipped with an activated carbon adsorption component and a biofilm component. The water filtered by the second filter cylinder (3) is discharged after being treated by the activated carbon adsorption component. The activated carbon adsorption assembly includes a second support block (14) fixed to the bottom of the fixed shell (11), and a plurality of coaxially arranged fixed activated carbon tubes (41) are fixed to the bottom of the second support block (14). A plurality of coaxially arranged movable activated carbon tubes (42) are arranged in the inner cavity of the movable shell (12). The fixed activated carbon tubes (41) and the movable activated carbon tubes (42) are offset and slidably connected. The movable activated carbon tube (42) achieves relative displacement with the fixed activated carbon tube (41) through the lifting component, forming a dynamically matched adsorption interface, while adjusting the size of the filter chamber (4); when the sewage enters the filter chamber (4) after passing through the pre-filtration stage, the water flows through the staggered channel formed by the fixed activated carbon tube (41) and the movable activated carbon tube (42) in sequence; during the process of the lifting component driving the movable shell (12) to move up and down, the movable activated carbon tube (42) and the fixed activated carbon tube (41) generate axial relative displacement, so that the contact surface between the two continuously changes, thereby allowing the adsorption saturated activated carbon area to be replaced, while exposing the underutilized activated carbon area to the water flow.

2. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 1, characterized in that: The first filter cylinder (2) includes two symmetrically arranged fixing plates (21), with the ends of the two fixing plates (21) being far apart from each other and respectively fixed to the inner cavity of the fixing shell (11); a filter screen (23) is rotatably connected between the two fixing plates (21), and the filter screen (23) is connected to the first drive assembly disposed at the top of the fixing shell (11).

3. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 2, characterized in that: The first slag discharge assembly includes a slag discharge trough (24) fixed between the two fixed plates (21). The top of the slag discharge trough (24) is open. A first cleaning plate (25) is fixed to the side of the slag discharge trough (24) in the rotation direction of the filter screen (23). The end of the first cleaning plate (25) slides in contact with the inner wall of the filter screen (23). A screw conveyor (27) is rotatably connected inside the slag discharge trough (24) to discharge the residue that falls into the slag discharge trough (24).

4. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 2, characterized in that: A plurality of reinforcing rods (211) are rotatably connected between the two fixed plates (21), and the filter screen (23) is rolled into a cylindrical shape and fixed between the plurality of reinforcing rods (211). The two ends of the filter screen (23) are respectively sealed and slidably connected to the fixed plate (21). A first driven gear (212) is sleeved on the outer wall of the plurality of reinforcing rods (211), and the first driven gear (212) is connected to the first drive assembly in a transmission manner.

5. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 1, characterized in that: The fixed shell (11) is fixedly connected to a first support block (13) located below the first filter cylinder (2). The bottom end of the first support block (13) is provided with an installation cavity (15). The second filter cylinder (3) is rotatably connected in the installation cavity (15). The second slag discharge assembly is fixedly connected to the top end of the installation cavity (15) and communicates with the inner cavity of the second filter cylinder (3). The first support block (13) is provided with a second drive assembly that drives the second filter cylinder (3) to rotate.

6. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 5, characterized in that: The top of the second filter cylinder (3) is provided with a drive cover (34) that is connected to the second drive assembly. The drive cover (34) is rotatably connected in the mounting cavity (15). The side wall of the drive cover (34) is provided with a plurality of slag outlets (35), which are connected to the second slag outlet assembly.

7. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 6, characterized in that: A cleaning rod (36) is rotatably connected inside the second filter cylinder (3), and the cleaning rod (36) is fixedly connected to the inner cavity of the fixed shell (11); a number of second cleaning plates (37) arranged in an arc shape are axially and equally spaced on the outer wall of the cleaning rod (36), and the second cleaning plates (37) slide in contact with the inner wall of the second filter cylinder (3).

8. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 6, characterized in that: The second slag discharge assembly includes an annular slag discharge plate (38) fixedly connected in the mounting cavity (15). The inner ring of the annular slag discharge plate (38) is slidably sealed to the side wall of the drive cover (34). The residue discharged through the slag discharge port (35) falls onto the annular slag discharge plate (38). The outer wall of the drive cover (34) is fixedly connected to a push plate (39) corresponding to the annular slag discharge plate (38). The push plate (39) discharges the residue on the annular slag discharge plate (38) through the second slag discharge channel (310).

9. The activated carbon adsorption regeneration system for multi-stage wastewater treatment according to claim 1, characterized in that: The second support block (14) has a drainage chamber (43) that communicates with the outside. The bottom end of the drainage chamber (43) is connected to the outer wall of the top of the filter chamber (4) through several drainage holes (44). A one-way valve (45) that opens to the drainage chamber (43) is provided in the drainage hole.

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