Activated carbon adsorption regeneration system applied to multi-stage sewage treatment

Abstract

The invention belongs to the technical field of sewage treatment, and discloses an activated carbon adsorption regeneration system applied to multi-stage sewage treatment, the activated carbon adsorption regeneration system comprises a fixed shell and a movable shell which are coaxially arranged, and the movable shell slides on the fixed shell in a sealing manner through a lifting assembly; the first filter cartridge is horizontally and rotationally connected to the top end of the fixed shell; a first deslagging assembly is arranged at the top end of an inner cavity of the first filter cartridge; the second filter cartridge is vertically and rotatably connected into the fixed shell, a second residue discharging assembly is arranged at the top end of the second filter cartridge, and filtered residues are discharged out of the fixed shell through the second residue discharging assembly; an activated carbon adsorption assembly with a biological membrane assembly is arranged in the filter cavity, and water filtered by the second filter cartridge is discharged after being treated by the activated carbon adsorption assembly. The sewage treatment device is compact in structure, convenient to use and easy to maintain, sewage is treated in modes of multi-stage filtration, activated carbon adsorption and the like, filtered residues can be automatically cleaned in the filtration process, meanwhile, the residues are automatically discharged, and automatic treatment of the sewage is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an activated carbon adsorption regeneration system applied to multi-stage sewage treatment. Background Art

[0002] Wastewater filtration is an essential step in wastewater treatment. It removes suspended matter from wastewater, facilitating subsequent treatment and preventing it from clogging subsequent equipment. Existing filtration devices typically use a screen to intercept suspended matter in the water. The remaining water and small particles of suspended matter pass through the screen and are then discharged from the filtration device for the next process.

[0003] Existing sewage treatment technologies often face various challenges. First, traditional sewage treatment systems are often complex in structure, occupy a large area, and have high maintenance costs. Secondly, many sewage treatment systems lack flexibility and adjustability, and are difficult to adapt to sewage filtration needs of different flow rates. Furthermore, traditional filtration methods often cannot effectively remove residues and suspended matter in sewage, resulting in certain problems with the quality of the treated water. In addition, for deep adsorption treatment of organic matter, odor, pigments, etc., traditional methods are often inefficient and require frequent replacement of adsorption materials, which increases operating costs. Moreover, existing sewage treatment is generally simple mechanical treatment or biological treatment, with a single treatment effect and insufficient treatment efficiency. Finally, many sewage treatment systems cannot automatically clean and discharge filtered residues during the treatment process, and require manual intervention, which affects the degree of automation of sewage treatment.

[0004] Therefore, the present invention designs an activated carbon adsorption regeneration system for multi-stage sewage treatment to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an activated carbon adsorption regeneration system for multi-stage sewage treatment to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides an activated carbon adsorption regeneration system for multi-stage sewage treatment, comprising:

[0007] The housing comprises a coaxially arranged fixed shell and a movable shell, wherein the movable shell is sealed and slidable on the bottom end of the inner cavity of the fixed shell via a lifting assembly;

[0008] a first filter cartridge, the first filter cartridge being horizontally rotatably connected to the top end of the fixed housing; a first slag discharge assembly being provided at the top end of the inner cavity of the first filter cartridge, the first slag discharge assembly being in sliding contact with the inner cavity of the first filter cartridge; wastewater from the outside is fed into the first filter cartridge, and the residue filtered out is discharged from the fixed housing through the first slag discharge assembly;

[0009] a second filter cartridge, the second filter cartridge being vertically rotatably connected to the fixed housing, a second slag discharge assembly being provided at the top end of the second filter cartridge, the water filtered by the first filter cartridge entering the second filter cartridge for centrifugal filtration, and the filtered residue being discharged from the fixed housing through the second slag discharge assembly;

[0010] The filter chamber is provided with an activated carbon adsorption component, and a biofilm component is provided on the activated carbon component. The water filtered by the second filter cartridge is treated by the activated carbon adsorption component and then discharged.

[0011] Preferably, the first filter cartridge includes two symmetrically arranged fixed plates, and the ends of the two fixed plates that are away from each other are respectively fixedly connected to the inner cavity of the fixed shell; a filter screen is rotatably connected between the two fixed plates, and the filter screen is transmission-connected to the first drive assembly arranged at the top of the fixed shell.

[0012] Preferably, the first slag discharge component includes a slag discharge trough fixedly connected between the two fixed plates, the top of the slag discharge trough is open, the slag discharge trough is located on one side of the rotation direction of the filter screen and is fixed with a first cleaning plate, the end of the first cleaning plate is in sliding contact with the inner wall of the filter screen; a screw conveyor is rotatably connected in the slag discharge trough to discharge the residue falling into the slag discharge trough.

[0013] Preferably, a number of reinforcing rods arranged axially at equal intervals are rotatably connected between the two fixed plates, the filter screen is rolled into a cylindrical shape and fixed between the several reinforcing rods, and the two ends of the filter screen are respectively sealed and slidably connected with the fixed plates; the outer walls of the several reinforcing rods are provided with a first driven gear, and the first driven gear is transmission-connected to the first drive assembly.

[0014] Preferably, a first support block located below the first filter cartridge is fixedly connected in the fixed shell, an installation cavity is opened at the bottom end of the first support block, the second filter cartridge is rotatably connected in the installation cavity, the second slag discharge assembly is fixedly connected to the top of the installation cavity and communicated with the inner cavity of the second filter cartridge, and a second driving assembly for driving the second filter cartridge to rotate is provided in the first support block.

[0015] Preferably, a driving cover is provided at the top end of the second filter cylinder and is transmission-connected to the second driving assembly, and the driving cover is rotatably connected in the mounting cavity; a plurality of slag outlets are provided on the side wall of the driving cover, and the slag outlets are connected to the second slag outlet assembly.

[0016] Preferably, a cleaning rod is rotatably connected to the inside of the second filter cartridge, and the cleaning rod is fixed to the inner cavity of the fixed shell; a plurality of arc-shaped second cleaning plates are axially fixed to the outer wall of the cleaning rod at equal intervals, and the second cleaning plates are in sliding contact with the inner wall of the second filter cartridge.

[0017] Preferably, the second slag discharge assembly includes an annular slag discharge plate fixedly connected in the mounting cavity, the inner ring of the annular slag discharge plate is sealed and slidingly connected with the side wall of the driving cover, and the residue discharged through the slag discharge port falls onto the annular slag discharge plate; the outer wall of the driving cover is fixedly connected to a push plate arranged corresponding to the annular slag discharge plate, and the push plate discharges the residue on the annular slag discharge plate through the second slag discharge channel.

[0018] Preferably, the activated carbon adsorption assembly includes a second support block fixedly connected to the bottom end of the fixed shell, the bottom end of the second support block is fixedly connected to a plurality of coaxially arranged fixed activated carbon tubes, the inner cavity of the movable shell is provided with a plurality of coaxially arranged movable activated carbon tubes, and the fixed activated carbon tubes and the movable activated carbon tubes are staggered and slidably connected.

[0019] Preferably, a drainage cavity connected to the outside is provided in the second support block, the bottom end of the drainage cavity is connected to the outer wall of the top end of the filter cavity through a plurality of drainage holes, and a one-way valve that opens in one direction to the drainage cavity is provided 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 sewage treatment, which is mainly composed of a shell, a first filter cartridge, a second filter cartridge and a filter chamber, etc., and realizes effective treatment of sewage through multi-stage filtration and activated carbon adsorption; the shell includes a fixed shell and a movable shell that are coaxially arranged and can slide up and down, which is convenient for maintenance, replacement of components or adjustment of system status, and at the same time, the volume of the filter chamber can be adjusted according to needs, so as to meet the sewage filtration needs of different flow rates; the first filter cartridge is horizontally rotated and connected to the top of the fixed shell, and a first residue discharge component is provided at the top of the inner cavity. The sewage first enters the first filter cartridge for preliminary filtration, and the residue is discharged through the first residue discharge component; the second filter cartridge is vertically rotated and connected in the fixed shell, and the water filtered by the first filter cartridge enters the second filter cartridge for centrifugal filtration to further remove the residue, and at the same time, the residue is automatically discharged through the second residue discharge component, and the residue is discharged through the first filter cartridge and the second filter cartridge. The multi-stage filtration of the two filter cartridges effectively removes most of the residue and suspended matter in the sewage, improving the water quality; an activated carbon adsorption component is provided in the filter chamber to treat the water filtered by the second filter cartridge, and the activated carbon adsorption component is used to deeply adsorb organic matter, odor, pigments, etc. in the water, further improving the water quality; a biofilm component is provided on the surface of the activated carbon component, which uses microorganisms to form a biofilm on the surface of the solid medium, and the organic matter is degraded by microorganisms to achieve sewage purification, thereby increasing the treatment effect of the activated carbon adsorption component on sewage; during sewage treatment, the sewage is first sent to the first filter cartridge for preliminary filtration, and the residue is discharged through the first residue discharge component. The water after preliminary filtration enters the second filter cartridge for centrifugal filtration to further remove the residue. The residue is discharged through the second residue discharge component. The sewage that has been filtered multiple times enters the filter chamber and is deeply purified by the activated carbon adsorption component. The treated water is discharged from the system to meet the emission standards or be used for other purposes.

[0021] The present invention has a compact structure, is easy to use and maintain, and treats sewage through multi-stage filtration and activated carbon adsorption. During the filtration process, the filtered residue can be automatically cleaned and the residue can be automatically discharged, thereby facilitating the automated treatment of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

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

[0024] Figure 2 Schematic diagram of the structure of the activated carbon adsorption regeneration system applied to multi-stage sewage treatment according to the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

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

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

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

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

[0030] Figure 8 For the present invention Figure 7 A partial enlarged view of B in the middle;

[0031] Figure 9 It is a cross-sectional schematic diagram of the slag chute of the present invention;

[0032] Figure 10 For the present invention Figure 9 Figure 2. Local method diagram of C in the figure;

[0033] Figure 11 For the present invention Figure 2 Figure 2. Local method diagram of D in the middle;

[0034] In the figure: 1, housing; 2, first filter cartridge; 3, second filter cartridge; 4, filter chamber; 11, fixed housing; 12, movable housing; 13, first support block; 14, second support block; 15, mounting chamber; 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 trough; 25, first cleaning plate; 26, water leakage hole; 27, screw conveyor; 28, slag barrel; 29, first slag discharge channel; 210, water inlet pipe; 211, reinforcement rod; 212, first driven gear; 2 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 plate; 39. Push plate; 310. Second slag discharge channel; 311. Fixed frame; 312. Permeation 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 DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is 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 regeneration system for multi-stage sewage treatment, comprising:

[0038] The housing 1 comprises a coaxially arranged fixed shell 11 and a movable shell 12, wherein the movable shell 12 is sealed and slidable on the bottom end of the inner cavity of the fixed shell 11 via a lifting assembly;

[0039] The first filter cartridge 2 is horizontally rotatably connected to the top of the fixed shell 11. A first slag discharge assembly is provided at the top of the inner cavity of the first filter cartridge 2. The first slag discharge assembly is in sliding contact with the inner cavity of the first filter cartridge 2. After the external sewage is fed into the first filter cartridge 2, the filtered residue is discharged from the fixed shell 11 through the first slag discharge assembly.

[0040] The second filter cartridge 3 is vertically rotatably connected to the fixed shell 11 body 1. The top of the second filter cartridge 3 is provided with a second slag discharge assembly. The water filtered by the first filter cartridge 2 enters the second filter cartridge 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 provided with an activated carbon adsorption component, and a biofilm component is provided on the activated carbon component. The water filtered by the second filter cartridge 3 is treated by the activated carbon adsorption component and then discharged.

[0042] The present invention discloses an activated carbon adsorption regeneration system for multi-stage sewage treatment, which is mainly composed of a shell 1, a first filter cartridge 2, a second filter cartridge 3 and a filter chamber 4. It realizes effective treatment of sewage through multi-stage filtration and activated carbon adsorption; the shell 1 includes a fixed shell 11 and a movable shell 12 which are coaxially arranged and can slide up and down, which is convenient for maintenance, replacement of components or adjustment of system status, and at the same time, the volume of the filter chamber 4 can be adjusted as needed to meet the sewage filtration needs of different flow rates; the first filter cartridge 2 is horizontally rotated and connected to the top of the fixed shell 11, and a first residue discharge component is provided at the top of the inner cavity. The sewage first enters the first filter cartridge 2 for preliminary filtration, and the residue is discharged through the first residue discharge component; the second filter cartridge 3 is vertically rotated and connected in the fixed shell 11, and the water filtered by the first filter cartridge 2 enters the second filter cartridge 3 for centrifugal filtration to further remove the residue. At the same time, the residue is automatically discharged through the second residue discharge component, and the residue passes through the first filter cartridge 2 and the second filter cartridge 3. The multi-stage filtration effectively removes most of the residue and suspended matter in the sewage, improving the water quality. An activated carbon adsorption component is provided in the filter chamber 4 for treating the water filtered by the second filter cartridge 3. The activated carbon adsorption component deeply adsorbs organic matter, odor, pigment, etc. in the water, further improving the water quality. A biofilm component is provided on the surface of the activated carbon component, which uses microorganisms to form a biofilm on the surface of the solid medium, and the organic matter is degraded by the microorganisms to achieve sewage purification, thereby increasing the treatment effect of the activated carbon adsorption component on the sewage. During sewage treatment, the sewage is first sent to the first filter cartridge 2 for preliminary filtration, and the residue is discharged by the first residue discharge component. The water after preliminary filtration enters the second filter cartridge 3 for centrifugal filtration to further remove the residue. The residue is discharged by the second residue discharge component. The sewage after multiple filtrations enters the filter chamber 4 and is deeply purified by the activated carbon adsorption component. The treated water is discharged from the system to meet the discharge standards or be used for other purposes. The present invention has a compact structure, is easy to use and easy to maintain, and treats sewage through multi-stage filtration and activated carbon adsorption. The filtered residue can be automatically cleaned and discharged during the filtration process, facilitating the automated treatment of sewage.

[0043] Specifically, wastewater first enters the horizontally rotating first filter cartridge 2, where the filter screen inside intercepts large impurities. During the rotation, the residue is continuously scraped and discharged by the slag discharge assembly. The initially filtered water flows into the vertically positioned second filter cartridge 3 below. The centrifugal force generated by the high-speed rotation causes fine particles to adhere to the cylinder wall, where they are regularly removed through the top slag discharge port 35. After two stages of filtration, the water enters the activated carbon adsorption area, where the fixed tube and the movable block form a dynamic adsorption interface. Contaminants are captured by the activated carbon, and clean water flows out through the drain. Simultaneously, the biofilm assembly on the activated carbon adsorption assembly uses microorganisms to form a biofilm on the solid carrier surface, removing organic matter, nitrogen, phosphorus, and other pollutants from the wastewater through biodegradation. Compared to existing technologies, traditional single-stage filters require manual cleaning and cannot grade different particulate matter. This solution achieves stratified impurity removal through a two-stage filtration structure. While existing equipment requires complete shutdown to replace the filter screen, the local lifting design of the movable shell 12 allows for maintenance of specific components during operation. The combination of centrifugal filtration and slag removal by the push plate 39 replaces traditional backwashing methods, significantly reducing water consumption. Through the above technical solution, this application achieves continuous operation of multi-stage sewage filtration and adsorption treatment. The two-stage filter cartridges remove impurities of different particle sizes, reducing the load on the single-stage filter. The combination of the movable shell 12 and the liftable assembly eliminates the need for complete equipment shutdown for maintenance. The activated carbon module dynamically adjusts to enhance adsorption efficiency. Centrifugal force-assisted slag removal reduces the frequency of manual intervention. The overall system improves processing capacity while reducing operation and maintenance costs.

[0044] In one embodiment of the present invention, a support foot 16 is fixedly connected to the outer wall of the bottom end 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 end of the movable shell 12 is slidably connected to the guide section 18 to limit the lifting and lowering 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 transmission-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 movable shell 12 is driven to rise and fall and slide at the bottom end of the fixed shell 11 through the support ring 17.

[0046] As a further optimization scheme, the first filter cartridge 2 includes two symmetrically arranged fixed plates 21, and the ends of the two fixed plates 21 that are away from each other are fixedly connected to the inner cavity of the fixed shell 11 through positioning rods 22; a filter screen 23 is rotatably connected between the two fixed plates 21, and the filter screen 23 is transmission-connected to the first drive assembly arranged 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 an installation 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 through bearings to intercept solid particles in the sewage; the first drive assembly acts as a power to drive the filter screen 23 to rotate, accelerate filtration and assist in the discharge of residue, so that the residue attached to the surface of the filter screen 23 is separated from the filtration area with the direction of rotation; specifically, after the sewage enters the first filter cartridge 2 through the water inlet pipe 210, it is separated into solid and liquid by the rotating filter screen 23, and the 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 through the screw conveyor 27. This can achieve simultaneous filtration and slag discharge, avoid efficiency loss caused by shutdown for cleaning, solve the problem of decreased filtration efficiency caused by filter screen blockage, and realize continuous operation at the same time. The self-cleaning function of the filter screen 23 is realized in the sewage treatment process, eliminating the need for manual cleaning intervention, reducing the frequency of equipment maintenance, and ensuring the stability of filtration efficiency, avoiding fluctuations in processing capacity due to shutdown.

[0047] A further optimized solution is that the first slag discharge assembly includes a slag discharge chute 24 fixed between the two fixed plates 21. The top of the slag discharge chute 24 is open. The slag discharge chute 24 is located on one side of the filter screen 23 in the direction of rotation. The end of the first cleaning plate 25 is in sliding contact with the inner wall of the filter screen 23. A screw conveyor 27 is rotatably connected to the slag discharge chute 24 to discharge the residue that falls into the slag discharge chute 24. The slag discharge chute 24 is a U-shaped trough structure. The length direction of the trough body is arranged parallel to the axial direction of the filter screen 23. A plurality of water leakage holes 26 are provided at the bottom of the slag discharge chute 24 to drain excess water. The first cleaning plate 25 is used to scrape off attachments on the inner wall of the filter screen 23. This can be achieved by using a rubber push plate 39 or a metal scraper, the edge of which maintains line contact with the filter screen 23. The screw conveyor 27 is used to squeeze the collected residue and discharge it. Specifically, when the filter screen 23 rotates under the drive assembly, the solid particles adhered to the mesh are moved to the discharge chute 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 off the solid particles embedded in the mesh and guiding them into the open slag trough 24. The screw conveyor 27 rotates at a set speed in the slag trough 24, and its blades push the solid particles deposited at the bottom of the trough 24 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. Residue removal and filtration operations are carried out simultaneously, avoiding the equipment maintenance pressure caused by manual cleaning and ensuring 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 23, effectively preventing the degradation of the filtering performance due to mesh clogging.

[0049] In one embodiment of the present invention, the pitch of the spiral blades of the screw conveyor 27 gradually decreases toward the discharge direction, thereby gradually squeezing the residue and removing excess water.

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

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

[0052] A further optimized solution features a plurality of axially evenly spaced reinforcing rods 211 rotatably connected between the two fixed plates 21. The filter screen 23 is rolled into a cylindrical shape and fixed between the plurality of reinforcing rods 211. The filter screen 23 is sealed and slidingly connected to the fixed plates 21 at both ends. A first driven gear 212 is sleeved on the outer wall of the plurality of reinforcing rods 211, which is in transmission connection with the first drive assembly. The reinforcing rods 211 are arranged between the two fixed plates 21, providing radial support for the cylindrical filter screen 23 and transmitting rotational driving force, thereby ensuring uniform force on the filter screen 23. 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 via the first driven gear 212, the cylindrical filter screen 23 wound around the reinforcing rods 211 rotates accordingly.

[0053] In one embodiment of the present invention, the first drive assembly includes a first drive motor 214 fixedly mounted on the top of the fixed shell 11. The output end of the first drive motor 214 drives the first driven gear 212 to rotate through the first drive 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 on the top of the fixed shell 11 to protect the exposed first driving motor 214 and improve safety.

[0055] In a further optimized solution, a first support block 13 is fixedly connected to the fixed shell 11 and is located below the first filter cartridge 2. A mounting cavity 15 is defined at the bottom of the first support block 13. The second filter cartridge 3 is rotatably connected to the mounting cavity 15. A second slag discharge assembly is fixedly connected to the top of the mounting cavity 15 and communicates with the inner cavity of the second filter cartridge 3. A second drive assembly is provided within the first support block 13 to drive the rotation of the second filter cartridge 3. The first support block 13 is disposed within the fixed shell 11 and is located below the first filter cartridge 2, providing a stable mounting base for the second filter cartridge 3. The mounting cavity 15 is defined at the bottom of the first support block 13 to accommodate the second filter cartridge 3 and provide space for its rotation to prevent residue leakage. The second drive assembly is disposed within the first support block 13 to drive the second filter cartridge 3 to rotate to achieve centrifugal filtration. After the sewage is initially filtered by the first filter cartridge 2, the water flows downward into the second filter cartridge 3. Driven by the second drive assembly, the second filter cartridge 3 continues to rotate, separating the residue in the water through centrifugal action and throwing it toward the cylinder wall. The separated residue is discharged through the second residue discharge assembly, and the filtered water enters the subsequent processing link; the installation cavity 15 provides a closed space for the rotational movement of the second filter cartridge 3.

[0056] In one embodiment of the present invention, the top end of the first support block 13 is configured as a groove that descends toward the middle, so as to facilitate water collection toward the second filter cartridge 3 and avoid water accumulation.

[0057] In a further optimized solution, a drive cover 34 is provided at the top of the second filter barrel 3, which is transmission-connected to the second drive assembly. The drive cover 34 is rotationally connected to the mounting cavity 15. A plurality of slag outlets 35 are provided on the sidewall of the drive cover 34, which are connected to the second slag outlet assembly. The drive cover 34 covers the top of the second filter barrel 3 and establishes a power transmission relationship with the second drive assembly, thereby driving the second filter barrel 3 to rotate. The slag outlets 35 are provided on the sidewalls of the drive cover 34, and periodically discharge the residue into the second slag outlet assembly during the rotation of the drive cover 34. When the drive cover 34 is driven to rotate by the second drive assembly, the second filter barrel 3 rotates synchronously, and the residue attached to the inner wall of the second filter barrel 3 is thrown to the sidewall area under the action of centrifugal force, and then enters the interior of the second slag outlet assembly through the slag outlets 35. The centrifugal force generated by the operation of the equipment itself is used to continuously discharge the residue without interrupting the filtering 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, and the output end of the second drive motor 31 is connected to the second drive gear 32. The second drive gear 32 is engaged with the second driven gear 33 provided on the drive cover 34 to realize the driving of the second filter cartridge 3.

[0059] A further optimized solution is that a cleaning rod 36 is rotatably connected to the inside of the second filter cartridge 3, and the cleaning rod 36 is fixed to the inner cavity of the fixed shell 11; a plurality of second cleaning plates 37 arranged in an arc shape are fixed to the outer wall of the cleaning rod 36 at equal intervals in the axial direction, and the second cleaning plates 37 are in sliding contact with the inner wall of the second filter cartridge 3. The cleaning rod 36 is fixed to the fixed shell 11 by a fixing frame 311, which extends into the interior of the second filter cartridge 3 and is rotatably connected to the second filter cartridge 3, providing fixed support for the cleaning device; the second cleaning plates 37 are arc-shaped push plates 39 evenly distributed on the outer wall of the cleaning rod 36 along the axial direction, and the second cleaning plates 37 are arranged in a spiral shape longitudinally, which can scrape off the residue through sliding contact, and can push the residue upwards to facilitate discharge from the residue outlet 35; when the second filter cartridge 3 rotates during the centrifugal filtration process, the fixedly connected cleaning rod 36 remains stationary, and as the second filter cartridge 3 rotates, the cleaning rod 36 remains stationary. As the filter cartridge 3 rotates, the arc-shaped second cleaning plate 37 continuously makes sliding contact with the inner wall of the filter cartridge, gradually scraping off the residue attached to the inner wall. The scraped residue is pushed up by the centrifugal force and the spirally arranged second cleaning plate 37 and discharged through the residue outlet 35. The entire process can complete the real-time cleaning of the inner wall of the filter cartridge without stopping the machine, and realize automatic removal of residue without affecting the continuity of the filtering operation, thereby solving the problems of equipment operation interruption and excessive maintenance frequency, maintaining the filtration efficiency of the second filter cartridge 3, and reducing the equipment maintenance workload.

[0060] To further optimize the solution, the second slag discharge assembly 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 sealed and slidingly connected with the side wall of the driving cover 34, and the residue discharged through the slag discharge port 35 falls onto the annular slag discharge plate 38; the outer wall of the driving cover 34 is fixedly connected with a push plate 39 arranged corresponding to the annular slag discharge plate 38, and the push plate 39 discharges the residue on the annular slag discharge plate 38 through the second slag discharge channel 310. The annular slag discharge plate 38 is axially arranged around the drive cover 34 and is used to receive the residue thrown out from the slag outlet 35 of the drive cover 34 after centrifugal filtration; the push plate 39 is a scraping component fixed to the outer wall of the drive cover 34, and its radial extension length covers the width range of the annular slag discharge plate 38. During the rotation process, 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 drum 3, the material containing the residue is thrown out to the surface of the annular slag discharge plate 38 through the slag outlet 35 on the side wall of the drive cover 34, and the push plate 39 rotates synchronously with the drive cover 34, and its arc-shaped edge maintains 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, thereby realizing continuous discharge of the residue.

[0061] In one embodiment of the present invention, a barrier layer 312 is provided in the installation cavity 15, and an annular support plate 313 is provided outside the support frame 311. The barrier layer 312 is stacked on the support plate 313, and a cavity adapted to the second filter cartridge 3 is provided on the barrier layer 312. When the second filter cartridge 3 is rotated centrifugally, the separated water falls into the cavity, and then passes through the porous support plate 313 after being filtered by the barrier layer 312 and falls to the top of the second support block 14, and is then conveniently transferred to the concave activated carbon adsorption assembly.

[0062] In one embodiment of the present invention, the seepage barrier layer 312 utilizes soils of varying structures and combines various indicators based on the migration and control of heavy metals in heterogeneous soils. Combined with sewage infiltration, chemical analysis of the sedimentary sand matrix, and the nutrient, salt, and heavy metal content of the sewage, the effect of cement embedded in the sand matrix on the interception of infiltrating water volume, some pollutants in the water, particularly heavy metals, and its impact on the migration of heavy metals in the soil is analyzed. Specifically, different soils, varying bulk densities, and combinations are selected as infiltration matrices. Fine particles such as fly ash, fine clay, cement particles, and blast furnace slag are selected as alternative fine particle materials for seepage barrier. Their interception effects on sewage infiltration are compared under the same infiltration method. Cement, which exhibits significant and easy-to-use seepage barrier effects, is then selected as the seepage barrier material. Furthermore, combined with sewage infiltration, the impact of cement embedded in the soil matrix on the interception and migration of heavy metals and related pollution indicators is explored. It is found that cement embedded in the soil matrix has a significant interception effect on heavy metals and other pollutant elements in sewage.

[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 the activated carbon fiber-loaded Ni / Fe-LDH composite catalytic material is used as a catalyst to effectively degrade the main pollutants in the sewage.

[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, and adopts impregnation adsorption, in-situ reduction / precipitation and anaerobic calcination to load transition metals Ni and Fe, and incorporates LDH to prepare modified ACF loaded with transition metals with different Ni / Fe ratios and new ACF composite materials with different structures; achieves efficient and low-consumption treatment of difficult-to-degrade organic matter in sewage and wastewater, reduces treatment costs, promotes industrial structure upgrading, and improves economic benefits; and lays an experimental and theoretical foundation for the large-scale application of ozone advanced oxidation deep treatment of sewage.

[0065] In one embodiment of the present invention, the following conclusions were drawn through experiments: fine particulate matter infiltrating into riverbed deposited sand can significantly reduce the infiltration capacity of water in the soil matrix; in a comparison of the seepage-blocking effects of several fine particulate materials, it was found that cement infiltration has the best seepage-blocking effect and is an ideal seepage-blocking particle that is both economical and practical: cement infiltration into the soil matrix can block the stable infiltration rate of soil moisture by about 35%; cement infiltration has a certain blocking effect on infiltrating water and some pollutants including heavy metals. The interception effect on heavy metals in sewage is obvious: there are many factors that affect the infiltration reduction effect of cement infiltration into riverbed silted sand, the main factors of which are the initial head of 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, the amount of cement infiltration, etc. For heterogeneous soils, after the infiltration water penetrates the infiltration soil column, the heterogeneous structure has no significant difference in the infiltration rate: the isolation layer formed by the combination of gel material and the upper soil plays a decisive role in the infiltration effect: based on the experiments, this project conducted a detailed mechanism analysis of the experimental results and phenomena. The experiment proved that adding cement fine particles to the soil matrix before or during the infiltration process has a significant effect on the infiltration capacity of the soil, especially for loose sandy soils, and has a significant interception effect on heavy metals and other pollutants in sewage, which is an effective measure to prevent the downward migration of heavy metals.

[0066] In one embodiment of the present invention, the push plate 39 is an arc-shaped plate inclined along the rotation direction, which can exert an outward squeezing force on the residue, thereby conveniently pushing 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 treatment of residues.

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

[0069] A further optimized solution is provided, in which the activated carbon adsorption assembly includes a second support block 14 fixed to the bottom end of the fixed shell 11. A plurality of coaxially arranged fixed activated carbon tubes 41 are fixed to the bottom end of the second support block 14. The inner cavity of the movable shell 12 is provided with a plurality of coaxially arranged movable activated carbon tubes 42. The fixed activated carbon tubes 41 and the movable activated carbon tubes 42 are staggered and slidably connected. The second support block 14 is mounted on the bottom of the fixed shell 11 to support the fixed activated carbon tubes 41 and to achieve stable installation of the activated carbon assembly. The plurality of fixed activated carbon tubes 41 are coaxially fixed to the bottom of the second support block 14 to form a water flow channel. The plurality of movable activated carbon tubes are arranged in the inner cavity of the movable shell 12 and cooperate with the fixed activated carbon tubes 41. Relative displacement with the fixed activated carbon tubes 41 is achieved through a lifting assembly, forming a dynamically coordinated adsorption interface and simultaneously adjusting the specifications of the filter chamber 4. When sewage 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 the movable activated carbon tubes 42. When the lifting assembly drives the movable shell 12 to move up and down, the movable activated carbon tube 42 and the fixed activated carbon tube 41 produce axial relative displacement, so that the contact surface between the two continuously changes, so that the adsorption saturated activated carbon area can be replaced, and the activated carbon area that is not fully utilized is exposed to the water flow.

[0070] In one embodiment of the present application, the biofilm assembly includes a biofilm 47 attached and grown on the surfaces of the fixed activated carbon tubes 41 and the movable activated carbon tubes 42. Microorganisms adhere to the solid surface, forming a bioactive film layer that can adsorb and degrade organic matter. This film, primarily composed of microorganisms such as bacteria, fungi, algae, and protozoa, forms biofilm 47, which can significantly improve sewage treatment efficiency, reduce pollutant emission concentrations, provide a stable growth environment for microorganisms, enhance microbial activity and diversity, and improve biological treatment effectiveness. Compared to traditional treatment methods, biofilm technology has lower energy and chemical consumption, can further improve treatment capacity and stability, reduce operating costs, and can recycle useful substances in sewage for resource utilization, which can be further processed for use as fertilizer or energy. It has strong adaptability and can be adjusted and optimized for different water quality characteristics. It is easy to implement automated management and reduce labor costs.

[0071] In one embodiment of the present invention, the biofilm 47 can construct a biological filter in the activated carbon adsorption component to remove pollutants such as organic matter and ammonia nitrogen in the sewage through the metabolism of microorganisms, and has the advantages of simple structure, easy operation, and high treatment efficiency; at the same time, the biofilm 47 can increase the concentration and activity of microorganisms, enhance the stability of sewage treatment, and put the biofilm 47 in a fluidized state. The sewage is in full contact with the biofilm 47, and the treatment efficiency is high. It is suitable for various types of sewage, including domestic sewage, industrial wastewater, and agricultural wastewater. According to the characteristics of different water quality, biofilm technology can selectively cultivate adapted microorganisms and effectively remove harmful substances in wastewater.

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

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

[0074] Denitrification: The biofilm contains microbial communities with different functions, which 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 anoxic conditions, thus removing nitrogen.

[0075] Phosphorus removal function: Certain microorganisms (such as polyphosphate bacteria) absorb excessive phosphorus under aerobic conditions and release phosphorus under anaerobic conditions. Phosphorus can be removed from the system through sludge discharge, achieving the effect of phosphorus removal.

[0076] Strong resistance to shock loads: The biofilm has a stable structure, rich microbial species, and is highly adaptable to fluctuations in water quality and volume, and is not easily ineffective due to changes in influent water quality.

[0077] Low sludge production: Compared with the activated sludge method, the microorganisms in biofilm technology grow on the carrier and are not easy to lose. The sludge production is relatively small, which reduces the sludge treatment cost.

[0078] Small footprint: Biofilm reactors usually have a higher volumetric load and treatment efficiency, so the volume of the reactor can be reduced, saving floor space, and are suitable for areas with limited land resources.

[0079] Stable operation and easy management: The biofilm system has stable operation, strong impact resistance, and relatively simple operation and management. It is suitable for small and medium-sized sewage treatment facilities and is also suitable for decentralized sewage treatment.

[0080] Can treat difficult-to-degrade organic matter: There are various types of microorganisms in the biofilm, and some microorganisms have the ability to degrade difficult-to-degrade organic matter (such as phenols, dyes, etc.), which is suitable for treating industrial wastewater.

[0081] In one embodiment of the present 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 at the highest position, the movable activated carbon tube 42 is fully inserted into the fixed activated carbon tube 41 to form a tight fit; when the movable shell 12 descends, the fitting area between the two gradually decreases, forming a gradual adsorption interface.

[0082] To further optimize the solution, a drainage cavity 43 connected to the outside is opened in the second support block 14, and the bottom end of the drainage cavity 43 is connected to the outer wall of the top of the filter cavity 4 through a plurality of drainage holes 44, and a one-way valve 45 that opens in one direction to the drainage cavity 43 is provided in the drainage hole. The drainage chamber 43 is arranged inside the second support block 14 and is connected to the external drainage pipe 46, which is used to collect the water treated by the activated carbon and guide it to be discharged outward; the drainage hole 44 connects the drainage chamber 43 with the top of the filter chamber 4, and the one-way valve 45 is a valve structure that only allows the fluid to flow from the filter chamber 4 to the drainage chamber 43, preventing the water in the drainage chamber 43 from flowing back to 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, so that 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 pressure of the external pipeline is abnormal, the one-way valve 45 automatically closes to block the reverse flow, preventing untreated water or pollutants from back-osmosis into the activated carbon component area, realizing the dual functions of directional discharge of treated water and backflow blocking, maintaining the continuous operation of the filtration system without stopping the machine, avoiding the problem of activated carbon layer pollution caused by pressure fluctuations, reducing the impact of maintenance operations on system operation, and extending the effective service life of the activated carbon component.

[0083] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

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

Claims

1. An activated carbon adsorption regeneration system for multi-stage sewage treatment, characterized in that: include: The housing (1) comprises a coaxially arranged fixed shell (11) and a movable shell (12), wherein the movable shell (12) is sealed and slidable at the bottom end of the inner cavity of the fixed shell (11) via a lifting assembly; A first filter cartridge (2), the first filter cartridge (2) being horizontally rotatably connected to the top end of the fixed shell (11) body (1), a first slag discharge assembly being provided at the top end of the inner cavity of the first filter cartridge (2), the first slag discharge assembly being in sliding contact with the inner cavity of the first filter cartridge (2); the residue filtered out after sewage from the outside is fed into the first filter cartridge (2) is discharged from the fixed shell (11) through the first slag discharge assembly; a second filter cartridge (3), the second filter cartridge (3) being vertically rotatably connected to the fixed shell (11) body (1), a second slag discharge assembly being provided at the top end of the second filter cartridge (3), the water filtered by the first filter cartridge (2) entering the second filter cartridge (3) for centrifugal filtration, and the filtered residue being discharged from the fixed shell (11) through the second slag discharge assembly; A filter chamber (4) is provided with an activated carbon adsorption component in the filter chamber (4), a biofilm component is provided on the activated carbon component, and the water filtered by the second filter cartridge (3) is treated by the activated carbon adsorption component and then discharged.

2. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 1 is characterized in that: The first filter cartridge (2) comprises two symmetrically arranged fixed plates (21), with ends of the two fixed plates (21) being fixedly connected to the inner cavity of the fixed shell (11) at ends away from each other; a filter screen (23) is rotatably connected between the two fixed plates (21), and the filter screen (23) is transmission-connected to a first drive assembly arranged at the top end of the fixed shell (11).

3. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 2 is characterized in that: The first slag discharge assembly comprises a slag discharge trough (24) fixedly connected between the two fixed plates (21), the top end of the slag discharge trough (24) being open, the slag discharge trough (24) being located on one side of the rotation direction of the filter screen (23) and fixedly connected to a first cleaning plate (25), the end of the first cleaning plate (25) being in sliding contact with the inner wall of the filter screen (23); a screw conveyor (27) being rotatably connected in the slag discharge trough (24) to discharge the residue falling into the slag discharge trough (24).

4. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 2, characterized in that: A plurality of reinforcing rods (211) arranged at equal axial intervals are rotatably connected between the two fixed plates (21); the filter screen (23) is rolled into a cylindrical shape and fixed between the plurality of reinforcing rods (211); and both ends of the filter screen (23) are respectively in sealing and sliding connection with the fixed plates (21); and a first driven gear (212) is sleeved on the outer walls of the plurality of reinforcing rods (211), and the first driven gear (212) is in transmission connection with the first drive assembly.

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

6. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 5, characterized in that: A driving cover (34) is provided at the top end of the second filter cylinder (3) and is transmission-connected to the second driving assembly. The driving cover (34) is rotatably connected in the mounting cavity (15). A plurality of slag discharge ports (35) are provided on the side wall of the driving cover (34), and the slag discharge ports (35) are communicated with the second slag discharge assembly.

7. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 6, characterized in that: A cleaning rod (36) is rotatably connected to the inside of the second filter cylinder (3), and the cleaning rod (36) is fixed to the inner cavity of the fixed shell (11); a plurality of second cleaning plates (37) arranged in an arc shape are fixed to the outer wall of the cleaning rod (36) at equal intervals in the axial direction, and the second cleaning plates (37) are in sliding contact with the inner wall of the second filter cylinder (3).

8. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 6, characterized in that: The second slag discharge assembly 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 in sealing and sliding connection with the side wall of the driving cover (34), and the residue discharged through the slag discharge port (35) falls onto the annular slag discharge plate (38); the outer wall of the driving cover (34) is fixedly connected with a push plate (39) corresponding to the annular slag discharge plate (38), and 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 sewage treatment according to claim 1, characterized in that: The activated carbon adsorption assembly comprises a second support block (14) fixedly connected to the bottom end of the fixed shell (11); a plurality of coaxially arranged fixed activated carbon tubes (41) are fixedly connected to the bottom end 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 staggered and slidably connected.

10. The activated carbon adsorption regeneration system for multi-stage sewage treatment according to claim 9, characterized in that: A drainage cavity (43) communicating with the outside is provided in the second support block (14); the bottom end of the drainage cavity (43) is communicated with the outer wall of the top end of the filter cavity (4) through a plurality of drainage holes (44); a one-way valve (45) opening in one direction toward the drainage cavity (43) is provided in the drainage hole.

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