A biofilm cleaning system and method

Abstract

This invention discloses a biofilm cleaning system and method, including an installation box assembly, a shielding component, a cleaning component, an equipment box assembly, a moving component, and a lifting component. The installation box assembly is used to arrange the biofilm in compartments. The cleaning component includes sequentially arranged rinsing, oxidative cleaning, acid washing, rinsing, and drying units. The moving component drives the lifting component to transfer the biofilm. The cleaning method includes: opening the shielding component to expose the biofilm; grabbing and transferring the biofilm using the moving and lifting components; continuously cleaning and drying it through each cleaning unit; and then resetting the biofilm. This invention achieves simultaneous removal of organic and inorganic pollutants, thorough cleaning without reagent residue, high automation, accelerated biofilm recovery, reduced system downtime, stable structure, and convenient maintenance. It is suitable for cleaning various types of biofilms in wastewater treatment.

Description

Technical Field

[0001] This invention relates to the field of biofilm cleaning technology, and in particular to a biofilm cleaning system and method. Background Technology

[0002] In the fields of wastewater treatment, water purification, and environmental governance, the biofilm method is a widely used and highly efficient treatment technology. Its core principle is to utilize a biofilm attached to a carrier surface, through which microorganisms degrade pollutants in the water, thus achieving water purification. As the carrier and metabolic site for microorganisms, the cleanliness of the biofilm surface directly determines microbial activity, treatment efficiency, and system operational stability. Therefore, regular cleaning and regeneration of the biofilm are crucial for ensuring the long-term, efficient operation of the entire treatment system.

[0003] Currently, during long-term filtration operation, residual sludge, colloidal substances, microbial metabolites, and inorganic pollutants inevitably accumulate on the surface of MBR membrane modules or biofilter media in biofilm treatment systems. These pollutants gradually accumulate, leading to membrane pore blockage and poor pore flow in the media, thereby reducing the specific surface area and microbial activity of the biofilm. This results in a decline in effluent quality, increased energy consumption, and in severe cases, even necessitates shutdown for maintenance, affecting the continuous operation of the treatment system.

[0004] To address the issue of contaminant accumulation on biofilm surfaces, current technologies typically employ a single cleaning method for biofilm regeneration, primarily categorized into physical cleaning and chemical cleaning. Physical cleaning often utilizes simple water rinsing or basic aeration, effectively removing loose contaminants such as sludge and suspended solids from the membrane surface or packing material layer. However, it has limited effectiveness against stubborn contaminants like tightly adhered biological slime, aged biofilm, and inorganic scale, making complete removal difficult and hindering the effective restoration of biofilm flux or packing porosity.

[0005] Chemical cleaning often uses a single type of chemical agent, such as sodium hypochlorite solution to oxidize and decompose organic pollutants, or citric acid solution to dissolve inorganic scale. It cannot simultaneously remove both organic and inorganic pollutants. At the same time, existing chemical cleaning processes lack scientific process design, and residual chemicals are difficult to completely remove after cleaning. When wastewater is introduced and restarted, the residual chemicals will inhibit microbial activity, affect the rapid recovery of biofilm, and thus prolong system downtime and reduce treatment efficiency. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing cleaning methods result in incomplete cleaning and slow recovery of biofilm.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a biofilm cleaning system, including an installation box assembly, in which slots are evenly arranged, and each slot has an independently openable and closable shielding component on its top. Biofilm is arranged in the slots. A cleaning component for continuously cleaning the biofilm is arranged in the slot at one end of the installation box assembly. An equipment box assembly is connected to one side of the cleaning component. A movable component is slidably arranged along the axial direction on the top of the installation box assembly, and a lifting component for lifting the biofilm is fixed on the movable component.

[0008] Preferably, the shielding assembly includes limiting grooves fixed on both sides of the top of the mounting box assembly and a mounting box fixed at the end of the limiting grooves. A winding shaft is rotatably arranged inside the mounting box, and a shielding roller blind is wound on the winding shaft. The two sides of the shielding roller blind are slidably connected in the limiting grooves. A take-up and unwinding motor for driving the winding shaft to rotate is fixedly connected to the top of the mounting box.

[0009] Preferably, the moving component includes a support shell, a support track rotatably connected to the bottom of the support shell, and a moving motor fixed to the support shell to drive the support track.

[0010] Preferably, guide grooves are fixedly provided on both sides of the top of the mounting box assembly. The guide grooves are arranged parallel to the mounting box assembly and have an I-shaped cross-section. The bottom of the support shell is provided with a slot to accommodate the guide grooves. Guide blocks are fixed on the opposite inner sidewalls of the support shell. The movable sidewall of the guide block fits against the inner sidewall of the guide groove. Support ribs are connected between the top wall and the sidewall of the support shell.

[0011] Preferably, a brush is fixedly installed at the bottom of the support shell, and the bottom end of the brush contacts the top surface of the mounting box assembly.

[0012] Preferably, the lifting assembly includes a gantry frame fixed between the movable components on both sides of the top of the mounting box assembly. A lifting shaft and a winch for driving the lifting shaft to rotate are provided in the middle of the gantry frame. A lifting rope is wound on the lifting shaft, and a hook is fixed to the movable end of the lifting rope.

[0013] Preferably, the cleaning assembly includes a rinsing unit, an oxidation cleaning unit, an acid washing unit, a rinsing unit, and a drying unit, which are respectively arranged in continuous tanks of the mounting box assembly; The rinsing unit includes a rinsing chamber, a support block assembly arranged in the rinsing chamber for tilting support of the biofilm, and rinsing nozzles evenly distributed inside the rinsing chamber. The rinsing nozzles are connected to the equipment box assembly via a water supply pipe.

[0014] Preferably, the support block assembly includes a bottom support block, a middle support block, and a top support block. The top of the bottom support block is provided with an inclined groove adapted to the bottom of the biofilm, and the middle support block and the bottom support block are both inclined.

[0015] Preferably, the oxidation cleaning unit, acid washing unit and rinsing unit are all provided with a stirring assembly in the middle, and the two sides inside are provided with limiting components for vertically installing the biofilm. The oxidation cleaning unit is filled with sodium hypochlorite solution, the acid washing unit is filled with dilute hydrochloric acid, and the rinsing unit is filled with water.

[0016] Preferably, the stirring assembly includes a support frame fixed in the middle of the compartment and a stirring belt vertically rotatably arranged inside the support frame. A stirring motor for driving the internal drive shaft of the stirring belt is fixed on the top of the support frame, and stirring blades are uniformly fixedly connected to the outer wall of the stirring belt.

[0017] Preferably, the limiting component includes bottom inserts fixed on both sides of the bottom of the compartment, the top of the bottom inserts being provided with a slot adapted to the bottom of the biofilm, the top of the slot being provided with a guide slope, and the limiting component also includes a top frame fixed between the inner sidewall of the compartment and the top of the support frame, the top frame having an opening in the middle for accommodating the top of the biofilm.

[0018] Preferably, the drying unit includes a support block assembly disposed in the corresponding compartment and drying air nozzles uniformly disposed on the inner sidewall of the compartment.

[0019] A biofilm cleaning method, using the aforementioned cleaning system, includes the following steps: S1. Open the shielding component to expose the biofilm inside the installation box group compartment; S2. Move the lifting component to the target slot using the moving component, grab and lift the biofilm, and close the shielding component; S3. The moving component drives the biofilm to be transferred sequentially inside the cleaning component, in the following order: rinsing unit, oxidation cleaning unit, acid washing unit, rinsing unit and drying unit, to continuously clean and dry; S4. After cleaning and drying, the biofilm is transferred back to the original compartment of the installation box by the lifting component, and the shielding component is opened again to reset the biofilm, thus completing the cleaning and regeneration of the biofilm.

[0020] Preferably, in step S1, when the shielding component is turned on, the winding shaft is driven to rotate by the unwinding motor to retract the shielding roller shutter. The shielding roller shutter slides along the limiting grooves on both sides to expose the biofilm in the mounting box compartment. The operation of turning off the shielding component is the reverse of the operation of turning it on.

[0021] Preferably, in step S2, when the moving component slides, the moving motor drives the support track to rotate, which in turn drives the lifting component composed of the support shell and the gantry frame to move. When moving, the guide block at the bottom of the support shell slides along the guide groove at the top of the installation box, and the brush simultaneously cleans the debris on the top surface of the installation box. Then, the winch drives the lifting shaft to rotate, releases the lifting rope, and uses the hook to grab and lift the biofilm.

[0022] Preferably, in step S3, after the biofilm is transferred to the rinsing unit, it is placed at an angle on the support block assembly. The rinsing nozzle is connected to the equipment box assembly through a water supply pipe to obtain water and rinse the biofilm in all directions to remove loose sludge and suspended matter from the surface of the biofilm. After the biofilm is transferred to the drying unit, it is also placed at an angle on the support block assembly inside the drying unit and dried quickly by delivering hot air through the drying nozzle.

[0023] Preferably, in step S3, after the biofilm is transferred to the oxidation cleaning unit, acid washing unit, and rinsing unit, the biofilm is placed within the limiting component. The sodium hypochlorite solution in the oxidation cleaning unit, under the action of the stirring component, fully contacts the biofilm to oxidize and decompose the organic pollutants and biological slime on the surface of the biofilm. The dilute hydrochloric acid in the acid washing unit fully dissolves the inorganic scale on the surface of the biofilm. The clean water in the rinsing unit fully washes away the residual agents and pollutants on the surface of the biofilm.

[0024] Preferably, the stirring assembly drives the drive shaft to rotate via the output shaft of the stirring motor, and the drive shaft drives the stirring belt to rotate. During the rotation of the stirring belt, the stirring blades on its outer wall agitate the liquid inside the tank, thereby achieving the circulation of the cleaning medium.

[0025] This invention provides a biofilm cleaning system and method, which has the following beneficial effects.

[0026] 1. The cleaning system features a continuous cleaning structure consisting of a rinsing unit, an oxidation cleaning unit, an acid washing unit, a rinsing unit, and a drying unit. The cleaning process involves first removing loose sludge and suspended solids through the rinsing unit, then oxidizing and decomposing organic pollutants and biological slime with sodium hypochlorite solution in the oxidation cleaning unit, dissolving inorganic scale with dilute hydrochloric acid in the acid washing unit, and finally removing residual chemicals through the rinsing unit. This effectively solves the problems of existing single-method cleaning methods, which struggle to address both organic and inorganic pollutants and achieve thorough cleaning, thus effectively restoring biofilm flux and carrier porosity.

[0027] 2. By working together with the moving and lifting components, the biofilm can be automatically grasped, transferred, cleaned, and reset without the need for manual handling. The shielding component opens and closes automatically through the winding and unwinding motor, and the stirring component automatically drives the cleaning medium to circulate. The entire process is automated, which not only reduces the labor intensity of operators but also avoids problems such as uneven cleaning and biofilm damage caused by manual operation.

[0028] 3. After cleaning, the biofilm is quickly dried by the drying unit to avoid residual moisture from breeding microorganisms. At the same time, the cleaning process is reasonably designed, and the rinsing is thorough and there is no chemical residue. This can avoid residual chemicals inhibiting microbial activity. After the biofilm is reset, it can quickly restore its activity, which greatly shortens the system downtime for cleaning and biofilm recovery time and improves the continuous operation efficiency of the sewage treatment system. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the shielding component in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of the moving component in an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the internal structure of the moving component in an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the internal structure of the cleaning component in an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the rinsing unit in an embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the structure of the stirring belt in an embodiment of the present invention.

[0036] In the diagram: 1. Mounting box assembly; 2. Equipment box assembly; 3. Shielding assembly; 4. Moving assembly; 5. Lifting assembly; 6. Flushing unit; 7. Oxidative cleaning unit; 8. Acid washing unit; 9. Rinsing unit; 10. Drying unit; 201. Water tank; 202. Water pump; 301. Limiting groove; 302. Mounting box; 303. Winding motor; 304. Obstruction roller shutter; 401. Support shell; 402. Support rib; 403. Support track; 404. Guide block; 405. Brush bristles; 406. Moving motor; 501. Gantry frame; 502. Lifting reel; 503. Winch; 601. Flushing nozzle; 602. Support block assembly; 603. Water supply pipe; 801. Support frame; 802. Stirring motor; 803. Stirring belt; 804. Stirring blades; 805. Bottom insert block; 806. Top frame; 807. Drive shaft; 101. Drying nozzle. Detailed Implementation

[0037] like Figures 1 to 7 As shown, the present invention provides a biofilm cleaning system, including an installation box assembly 1. The installation box assembly 1 is evenly provided with compartments, and each compartment is independently provided with an openable shielding component 3 on its top. Biofilm is arranged in the compartments. A cleaning component for continuously cleaning biofilm is provided in the compartment at one end of the installation box assembly 1. One side of the cleaning component is connected to an equipment box assembly 2. A moving component 4 is slidably arranged along the axial direction on the top of the installation box assembly 1. A lifting component 5 for lifting biofilm is fixed on the moving component 4.

[0038] The installation unit 1 is a container structure. Multiple compartments are set inside the installation unit 1. Each compartment is relatively sealed. The front compartment is equipped with a biofilm for water treatment, and the rear compartment is equipped with a cleaning component for cleaning and restoring the biofilm.

[0039] The equipment box 2 is equipped with a tank that provides the corresponding solution for the cleaning component, as well as control equipment for the moving component 4 and the lifting component 5; a camera is installed on the lifting component 5 to ensure accurate control during the biofilm transfer process.

[0040] like Figure 1 and Figure 2 As shown. The shielding assembly 3 includes limiting grooves 301 fixed on both sides of the top of the mounting box assembly 1 and a mounting box 302 fixed at the end of the limiting grooves 301. A winding shaft is rotatably arranged inside the mounting box 302, and a shielding roller blind 304 is wound on the winding shaft. The two sides of the shielding roller blind 304 are slidably connected in the limiting grooves 301. A take-up and unwinding motor 303 that drives the winding shaft to rotate is fixedly connected to the top of the mounting box 302.

[0041] Each compartment of the installation box 1 is equipped with an independent shielding component 3 at the top. The shielding component 3 is used to control the opening and closing of the compartment. When cleaning or transferring the corresponding biofilm, the corresponding shielding component 3 is opened.

[0042] like Figure 1 , Figure 3 and Figure 4As shown. The moving component 4 includes a support shell 401, a support track 403 rotatably connected to the bottom of the support shell 401, and a moving motor 406 fixed to the support shell 401 to drive the support track 403. The moving motor 406 drives the track wheels in the support track 403 to rotate, thereby realizing the movement of the entire support shell 401.

[0043] like Figure 1 , Figure 3 and Figure 4 As shown. Guide grooves are fixedly provided on both sides of the top of the mounting box 1, arranged parallel to the mounting box 1. The cross-section of the guide groove is I-shaped. A slot to accommodate the guide groove is provided at the bottom of the support shell 401. Guide blocks 404 are fixed to the opposite inner sidewalls of the support shell 401. The movable sidewall of the guide block 404 fits against the inner sidewall of the guide groove. Support ribs 402 connect the top wall and sidewalls of the support shell 401. The guide grooves and guide blocks 404 ensure accurate movement of the moving component 4. The support ribs 402 are evenly distributed along the length of the support shell 401, improving the structural strength of the support shell 401 and enhancing the stability of the moving component 4.

[0044] like Figure 4 As shown. A brush 405 is fixedly installed at the bottom of the support shell 401, with the bottom end of the brush 405 contacting the top surface of the mounting box assembly 1. During movement, the brush 405 clears the path ahead of the moving component 4, preventing debris from raising the moving component 4 and causing the equipment to jam.

[0045] like Figure 1 As shown. The lifting assembly 5 includes a gantry frame 501 fixed between the movable assemblies 4 on both sides of the top of the mounting box 1. A lifting shaft 502 and a winch 503 for driving the lifting shaft 502 to rotate are provided in the middle of the gantry frame 501. A lifting rope is wound on the lifting shaft 502, and a hook is fixed to the movable end of the lifting rope.

[0046] The two movable components 4 on the top sides of the installation box 1 move synchronously, driving the lifting component 5 to move. After the lifting component 5 moves to the set position, the winch 503 drives the lifting shaft 502 to rotate, unwinding the lifting rope. Once the unwinding length of the lifting rope is sufficient, the hook can be connected to the biofilm by installing an electromagnetic adsorption structure on the hook, or workers can climb onto the installation box 1 and manually attach the hook to the biofilm. Then, the winch 503 controls the rotation of the lifting shaft 502 to lift the biofilm.

[0047] like Figure 5 and Figure 6As shown. The cleaning assembly includes a rinsing unit 6, an oxidation cleaning unit 7, an acid washing unit 8, a rinsing unit 9, and a drying unit 10, which are respectively arranged in the continuous tanks of the mounting box assembly 1; The rinsing unit 6 includes a rinsing chamber, a support block assembly 602 arranged in the rinsing chamber for tilting support of the biofilm, and rinsing nozzles 601 evenly distributed on the inner side of the rinsing chamber. The rinsing nozzles 601 are connected to the equipment box assembly 2 through a water supply pipe 603.

[0048] A water tank 201 and a water pump 202 are installed in the equipment box 2. The output end of the water pump 202 is connected to the water supply pipe 603. Several branch pipes are installed on the water supply pipe 603. The flushing nozzles 601 are evenly connected to the branch pipes. Water is supplied through the water tank 201, and the flushing nozzles 601 flush the biofilm evenly.

[0049] The oxidation cleaning unit 7 is filled with sodium hypochlorite solution, with a concentration range of 0.5% to 2.0% (mass fraction). This solution can effectively oxidize and decompose organic pollutants and biofilm on the biofilm surface, while avoiding damage to the biofilm itself due to excessive concentration. It also balances environmental protection and cleaning efficiency. The acid washing unit 8 is filled with dilute hydrochloric acid, with a concentration range of 5% to 15% (mass fraction). This concentration range can quickly dissolve inorganic scale on the biofilm surface without corroding the biofilm's carrier structure, thus meeting the process requirements for biofilm cleaning. The rinsing unit 9 is filled with clean water.

[0050] The flushing unit 6 recovers the water used for flushing the biofilm. After the water is recovered, it is filtered by the processor and then enters the water tank 201 for recycling.

[0051] like Figure 5 and Figure 6 As shown. The support block assembly 602 includes a bottom support block, a middle support block, and a top support block. The bottom support block has an inclined groove on its top that fits the bottom of the biofilm. Both the middle and bottom support blocks are inclined. The inclined groove on the top of the bottom support block is used to engage the bottom end of the biofilm. When the biofilm is placed at an angle, the middle and top support blocks support the middle and top of the biofilm, respectively. Inclined rinsing makes it easier to wash off the deposits on the biofilm.

[0052] like Figure 5 and Figure 7 As shown. The oxidation cleaning unit 7, acid washing unit 8, and rinsing unit 9 are all equipped with stirring components in their central parts, and limiting components for vertically installing the biofilm are provided on both sides of their interiors. The oxidation cleaning unit 7 is filled with sodium hypochlorite solution, the acid washing unit 8 is filled with dilute hydrochloric acid, and the rinsing unit 9 is filled with clean water.

[0053] Oxidation cleaning unit 7, acid washing unit 8 and rinsing unit 9 all adopt the immersion cleaning method. After the biofilm is immersed, the internal solution is stirred by the stirring component and circulated for cleaning, thereby improving the cleaning quality.

[0054] like Figure 5 and Figure 7 As shown. The stirring assembly includes a support frame 801 fixed in the middle of the tank and a stirring belt 803 vertically rotatably arranged inside the support frame 801. A stirring motor 802, which drives the internal drive shaft 807 of the stirring belt 803, is fixed to the top of the support frame 801. Stirring blades 804 are uniformly fixedly connected to the outer wall of the stirring belt 803. The stirring motor 802 drives the drive shaft 807 to rotate, and the drive shaft 807 drives the stirring belt 803 to rotate. During the rotation of the stirring belt 803, the liquid is stirred by the multiple stirring blades 804 on its surface, thus circulating and cleaning the biofilm. The stirring belt 803 is arranged inside the support frame 801 and does not contact the biofilm. The stirring method using stirring blades 804 allows for the simultaneous and uniform cleaning of two biofilms being cleaned.

[0055] like Figure 5 As shown. The limiting assembly includes bottom inserts 805 fixed on both sides of the bottom of the compartment. Each bottom insert 805 has a slot at its top that adapts to the bottom of the biofilm. A guide slope is provided at the top of the slot. The limiting assembly also includes a top frame 806 fixed between the inner wall of the compartment and the top of the support frame 801. An opening in the middle of the top frame 806 is provided to accommodate the top of the biofilm. During the lowering process, the bottom end of the biofilm first contacts the bottom inserts 805, then slides down the guide slope into the slot, thus fixing the bottom end of the biofilm. The top frame 806 limits the position of the top of the biofilm, preventing it from shaking during cleaning.

[0056] like Figure 5 As shown, the drying unit 10 includes a support block assembly 602 disposed in the corresponding compartment and drying nozzles 101 uniformly disposed on the inner sidewall of the compartment. The equipment box assembly 2 provides high-temperature drying gas to the drying nozzles 101 to dry the biofilm. After drying, the biofilm can be re-used.

[0057] The entire biofilm cleaning system can continuously clean multiple biofilms and immediately reinstall and reset the biofilms after cleaning, ensuring continuous use of the equipment.

[0058] A biofilm cleaning method, using the aforementioned cleaning system, includes the following steps: S1. Open the shielding component 3 to expose the biofilm in the sub-slot of the installation box 1; S2. Move the lifting component 5 above the target slot by moving component 4, grab and lift the biofilm, and close the shielding component 3. S3, the moving component 4 drives the biofilm to transfer sequentially inside the cleaning component, in the following order: rinsing unit 6, oxidative cleaning unit 7, acid washing unit 8, rinsing unit 9 and drying unit 10, to continuously clean and dry; S4. After cleaning and drying, the biofilm is transferred back to the original compartment of the installation box 1 by lifting component 5, and the shielding component 3 is opened again to reset the biofilm, thus completing the cleaning and regeneration of the biofilm.

[0059] In step S1, when the shielding component 3 is turned on, the winding shaft is driven to rotate by the winding motor 303, and the shielding roller shutter 304 is rolled up. The shielding roller shutter 304 slides along the limiting grooves 301 on both sides, exposing the biofilm in the groove of the installation box 1. The operation of turning off the shielding component 3 is the opposite of the operation of turning it on.

[0060] In step S2, when the moving component 4 slides, the moving motor 406 drives the support track 403 to rotate, which in turn drives the lifting component 5 composed of the support shell 401 and the gantry frame 501 to move. When moving, the guide block 404 at the bottom of the support shell 401 slides along the guide groove at the top of the mounting box 1. The brush 405 simultaneously cleans the debris on the top surface of the mounting box 1. Then, the winch 503 drives the lifting shaft 502 to rotate, releases the lifting rope, and uses the hook to grab and lift the biofilm.

[0061] In step S3, after the biofilm is transferred to the rinsing unit 6, it is placed at an angle on the support block group 602. The rinsing nozzle 601 is connected to the equipment box group 2 through the water supply pipe 603 to obtain water source and rinse the biofilm in all directions to remove loose sludge and suspended matter on the surface of the biofilm. After the biofilm is transferred to the drying unit 10, it is also placed at an angle on the support block group 602 inside the drying unit 10 and hot air is delivered through the drying nozzle 101 for rapid drying.

[0062] In step S3, after the biofilm is transferred to the oxidation cleaning unit 7, acid washing unit 8, and rinsing unit 9, the biofilm is placed within the limiting component. The sodium hypochlorite solution in the oxidation cleaning unit 7, under the action of the stirring component, fully contacts the biofilm to oxidize and decompose the organic pollutants and biological slime on the surface of the biofilm. The dilute hydrochloric acid in the acid washing unit 8 fully dissolves the inorganic scale on the surface of the biofilm. The clean water in the rinsing unit 9 fully cleans the residual agents and pollutants on the surface of the biofilm.

[0063] The stirring assembly drives the drive shaft 807 to rotate via the output shaft of the stirring motor 802. The drive shaft 807 drives the stirring belt 803 to rotate. During the rotation of the stirring belt 803, the stirring blades 804 on its outer wall agitate the liquid inside the tank, thereby achieving the circulation of the cleaning medium.

Claims

1. A biofilm cleaning system, characterized in that: The installation box assembly (1) includes a uniformly arranged compartment, and each compartment has an independently closable shielding component (3) on its top. The compartment contains a biofilm. A cleaning component for continuously cleaning the biofilm is installed in the compartment at one end of the installation box assembly (1). One side of the cleaning component is connected to an equipment box assembly (2). A moving component (4) is slidably arranged on the top of the installation box assembly (1) along the axial direction. A lifting component (5) for lifting the biofilm is fixed on the moving component (4).

2. The biofilm cleaning system as described in claim 1, characterized in that: The shielding assembly (3) includes a limiting groove (301) fixed on both sides of the top of the mounting box assembly (1) and a mounting box (302) fixed at the end of the limiting groove (301). A winding shaft is rotatably arranged inside the mounting box (302), and a shielding roller blind (304) is wound on the winding shaft. The two sides of the shielding roller blind (304) are slidably connected in the limiting groove (301). A take-up and unwinding motor (303) that drives the winding shaft to rotate is fixedly connected to the top of the mounting box (302).

3. The biofilm cleaning system as described in claim 1, characterized in that: The moving component (4) includes a support shell (401), a support track (403) rotatably connected to the bottom of the support shell (401), and a moving motor (406) fixed on the support shell (401) to drive the support track (403).

4. The biofilm cleaning system as described in claim 3, characterized in that: The top two sides of the mounting box assembly (1) are fixedly provided with guide grooves. The guide grooves are arranged parallel to the mounting box assembly (1). The cross-section of the guide groove is I-shaped. The bottom of the support shell (401) is provided with a slot to accommodate the guide groove. The inner sidewalls of the support shell (401) are fixed with guide blocks (404). The movable sidewall of the guide block (404) fits against the inner sidewall of the guide groove. The top wall and sidewall of the support shell (401) are connected by a support rib (402).

5. The biofilm cleaning system as described in claim 4, characterized in that: The bottom of the support shell (401) is fixedly installed with bristles (405), and the bottom end of the bristles (405) contacts the top surface of the mounting box assembly (1).

6. The biofilm cleaning system as described in claim 1, characterized in that: The lifting assembly (5) includes a gantry frame (501) fixed between the moving assemblies (4) on both sides of the top of the mounting box assembly (1). A lifting reel (502) and a winch (503) for driving the lifting reel (502) to rotate are provided in the middle of the gantry frame (501). A lifting rope is wound on the lifting reel (502), and a hook is fixed to the movable end of the lifting rope.

7. The biofilm cleaning system as described in claim 1, characterized in that: The cleaning assembly includes a rinsing unit (6), an oxidation cleaning unit (7), an acid washing unit (8), a rinsing unit (9), and a drying unit (10) respectively arranged in the continuous tanks of the mounting box assembly (1). The rinsing unit (6) includes a rinsing chamber, a support block group (602) arranged in the rinsing chamber for tilting support of the biofilm, and rinsing nozzles (601) evenly distributed on the inner side of the rinsing chamber. The rinsing nozzles (601) are connected to the equipment box group (2) through a water supply pipe (603).

8. The biofilm cleaning system as described in claim 7, characterized in that: The support block group (602) includes a bottom support block, a middle support block and a top support block. The top of the bottom support block is provided with an inclined groove that is adapted to the bottom of the biofilm. The middle support block and the bottom support block are both inclined.

9. The biofilm cleaning system as described in claim 7, characterized in that: The oxidation cleaning unit (7), acid washing unit (8) and rinsing unit (9) are all equipped with stirring components in the middle, and limiting components for vertical installation of the biofilm are provided on both sides inside. The oxidation cleaning unit (7) is filled with sodium hypochlorite solution, the acid washing unit (8) is filled with dilute hydrochloric acid, and the rinsing unit (9) is filled with clean water.

10. The biofilm cleaning system as described in claim 9, characterized in that: The stirring assembly includes a support frame (801) fixed in the middle of the compartment and a stirring belt (803) arranged vertically and rotatably inside the support frame (801). A stirring motor (802) that drives the internal drive shaft (807) of the stirring belt (803) is fixed on the top of the support frame (801). Stirring blades (804) are uniformly fixed on the outer side wall of the stirring belt (803).

11. The biofilm cleaning system as described in claim 10, characterized in that: The limiting component includes bottom inserts (805) fixed on both sides of the bottom of the compartment. The bottom inserts (805) have slots on their tops that are adapted to the bottom of the biofilm. The slots have guide slopes on their tops. The limiting component also includes a top frame (806) fixed between the inner sidewall of the compartment and the top of the support frame (801). The top frame (806) has an opening in the middle for accommodating the top of the biofilm.

12. The biofilm cleaning system as described in claim 8, characterized in that: The drying unit (10) includes a support block group (602) disposed in the corresponding compartment and drying nozzles (101) uniformly disposed on the inner sidewall of the compartment.

13. A biofilm cleaning method, using the cleaning system as described in any one of claims 1-12, characterized in that, Includes the following steps: S1. Open the shielding component (3) to expose the biofilm in the compartment of the installation box assembly (1); S2. Move the lifting component (5) to the target slot by moving component (4), grab and lift the biofilm, and close the shielding component (3). S3. The moving component (4) drives the biofilm to transfer sequentially inside the cleaning component, in the following order: rinsing unit (6), oxidation cleaning unit (7), acid washing unit (8), rinsing unit (9) and drying unit (10), to perform continuous cleaning and drying; S4. After cleaning and drying, the biofilm is transferred back to the original compartment of the installation box (1) by the lifting component (5), and the shielding component (3) is opened again to reset the biofilm, thus completing the cleaning and regeneration of the biofilm.

14. The biofilm cleaning method as described in claim 13, characterized in that: In step S1, when the shielding component (3) is turned on, the winding shaft is driven to rotate by the winding motor (303) to retract the shielding roller shutter (304). The shielding roller shutter (304) slides along the limiting grooves (301) on both sides to expose the biofilm in the groove of the installation box (1). The operation of turning off the shielding component (3) is the opposite of the operation of turning on.

15. The biofilm cleaning method as described in claim 13, characterized in that: In step S2, when the moving component (4) slides, the moving motor (406) drives the support track (403) to rotate, which in turn drives the lifting component (5) composed of the support shell (401) and the gantry frame (501) to move. When moving, the guide block (404) at the bottom of the support shell (401) slides along the guide groove at the top of the installation box assembly (1), and the brush (405) cleans the debris on the top surface of the installation box assembly (1) at the same time. Then the winch (503) drives the lifting shaft (502) to rotate, releases the lifting rope, and uses the hook to grab and lift the biofilm.

16. The biofilm cleaning method as described in claim 13, characterized in that: In step S3, after the biofilm is transferred to the rinsing unit (6), it is placed at an angle on the support block group (602). The rinsing nozzle (601) is connected to the equipment box group (2) through the water supply pipe (603) to obtain water source and rinse the biofilm in all directions to remove loose sludge and suspended matter on the surface of the biofilm. After the biofilm is transferred to the drying unit (10), it is also placed at an angle on the support block group (602) inside the drying unit (10) and hot air is delivered through the drying nozzle (101) for rapid drying.

17. The biofilm cleaning method as described in claim 13, characterized in that: In step S3, after the biofilm is transferred to the oxidation cleaning unit (7), acid washing unit (8) and rinsing unit (9), the biofilm is placed in the limiting component. The sodium hypochlorite solution in the oxidation cleaning unit (7) fully contacts the biofilm under the action of the stirring component, and oxidizes and decomposes the organic pollutants and biological slime on the surface of the biofilm. The dilute hydrochloric acid in the acid washing unit (8) fully dissolves the inorganic scale on the surface of the biofilm. The clean water in the rinsing unit (9) fully cleans the residual agents and pollutants on the surface of the biofilm.

18. The biofilm cleaning method as described in claim 17, characterized in that: The stirring assembly drives the drive shaft (807) to rotate via the output shaft of the stirring motor (802). The drive shaft (807) drives the stirring belt (803) to rotate. During the rotation of the stirring belt (803), the stirring blades (804) on its outer wall agitate the liquid inside the tank, thereby achieving the circulation of the cleaning medium.

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