Efficient filtering and separating device for preparing bio-based lactic acid by recycling kitchen garbage

Abstract

The invention relates to the technical field of kitchen waste treatment and recycling, and discloses an efficient filtering and separating device for preparing bio-based lactic acid through kitchen waste recycling, the efficient filtering and separating device comprises a mounting frame, a raw material tank and a base are mounted in the middle of the mounting frame, and a top cover is arranged at the top of the raw material tank; a rotary homogenizing and crushing mechanism is mounted at the bottom of the top cover and is used for crushing fibers and particles in raw materials and scraping attachments on the inner wall; the rotary homogenizing and crushing mechanism comprises a rotating frame, the rotating frame is rotationally connected to the bottom of the top cover, a stirring frame is rotationally connected to the middle of the rotating frame, a cutting blade and a scraper blade are fixedly connected to the middle of the stirring frame, and a first motor is installed at the top of the top cover; the rotating frame is fixedly connected to the output end of the first motor. By arranging composite rotary crushing, pipeline zero-energy-consumption self-cleaning filtering and terminal automatic switching material receiving, the blocking problem is solved, and the automation degree of the working process is improved.

Description

Technical Field

[0001] This invention relates to the field of kitchen waste treatment and resource utilization technology, specifically to a high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid. Background Technology

[0002] In the process of using kitchen waste to produce high-value products such as bio-based lactic acid, efficient solid-liquid separation is the core link that determines the quality of the final product and production efficiency. However, existing technical solutions generally have several shortcomings when handling complex liquid materials.

[0003] The composition of food waste fermentation liquid is extremely complex, containing a large amount of tough plant fibers, incompletely decomposed solid particles, and high-viscosity lumps. These impurities are the main sources of challenges in the treatment process. During the raw material storage stage, these solids are prone to settling and hardening at the bottom of the tank or forming a stubborn adhesion layer on the tank wall. Traditional stirring methods are often ineffective, resulting in dead zones and uneven discharge. The formation of large lumps further exacerbates the difficulty of subsequent processing.

[0004] When these insufficiently pretreated feed solutions are pumped out, the fibers and particles present pose a serious threat of clogging to subsequent pipelines, pumps, valves, and especially sophisticated membrane separation systems. This not only leads to frequent system shutdowns for manual disassembly and cleaning, significantly reducing overall production efficiency, but also increases equipment operation and maintenance costs.

[0005] Furthermore, in the final product collection stage, the production line generally relies on manual, timed replacement of material bins. This operating mode not only consumes valuable human resources but is also prone to product spillage and production interruptions due to untimely replacement or operational negligence, making it difficult to achieve truly 24 / 7, unattended, continuous automated production. Therefore, developing a device capable of crushing impurities at the source, preventing blockages online, and achieving full-process automation is a pressing technical challenge in this field. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a highly efficient filtration and separation device for the resource-based preparation of bio-based lactic acid from kitchen waste. This device solves the problems of frequent clogging of subsequent equipment due to the inability to effectively handle fiber particles in the raw materials, as well as the low degree of automation in the filtration and material collection processes, which affects production efficiency and stability.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a high-efficiency filtration and separation device for preparing bio-based lactic acid from kitchen waste, comprising an installation frame, a raw material tank and a base installed in the middle of the installation frame, a top cover provided on the top of the raw material tank, and a rotary homogenizing crushing mechanism installed at the bottom of the top cover for crushing fibers and particles in the raw material and scraping off the adhering substances on the inner wall; The rotary homogenizing crushing mechanism includes a rotating frame, which is rotatably connected to the bottom of the top cover. A stirring frame is rotatably connected to the middle of the rotating frame. A cutting blade and a scraper are fixedly connected to the middle of the stirring frame. A motor is installed on the top of the top cover. The rotating frame is fixedly connected to the output end of the motor. A revolution and rotation transmission assembly is installed on the outside of the rotating frame. The bottom of the raw material tank is fixedly connected to a conveying pipe, and the end of the conveying pipe is equipped with a self-cleaning filter mechanism to filter out broken fibers and particles in the raw material and prevent the conveying pipe from clogging. The top of the base is equipped with a periodic rotating mechanism, and the top of the periodic rotating mechanism is equipped with four collection buckets. The periodic rotating mechanism is used to periodically switch the collection buckets. The mounting frame is equipped with a water pump, a primary filter, a high-pressure pump, an ultrafiltration membrane, a nanofiltration membrane, and a discharge valve in the middle. The feed pipe, the water pump, the primary filter, the high-pressure pump, the ultrafiltration membrane, the nanofiltration membrane, and the discharge valve are connected in sequence through pipes. The discharge pipe connected to the output end of the discharge valve is located above one of the collection tanks.

[0008] Preferably, the revolution and rotation transmission assembly includes a first gear, which is fixedly connected to the outside of the rotating frame, a second gear is fixedly connected to the top of the stirring frame, and an internal gear ring is fixedly connected to the bottom of the top cover. Both the first gear and the internal gear ring mesh with the second gear.

[0009] Preferably, the self-cleaning filtration mechanism includes a filter screen, which is fixedly connected to the end of the feed pipe. An impeller is rotatably connected to the side of the filter screen, and the impeller is rotatably connected inside the feed pipe. A fixed housing is fixedly connected to the rotating shaft of the impeller. A cleaning brush is connected to the middle of the fixed housing through an adaptive elastic component. The side of the filter screen near the impeller is in contact with the cleaning brush.

[0010] Preferably, the adaptive elastic component includes a fixing plate, which is fixedly connected to the inside of the fixing shell. A fixing rod is fixedly connected to the side of the fixing plate, and a sliding block is slidably connected to the outside of the fixing rod. A connecting rod is rotatably connected to the side of the sliding block, and the connecting rod is rotatably connected to the side of the cleaning brush. A spring is sleeved on the outer periphery of the fixing rod.

[0011] Preferably, a telescopic rod is fixedly connected inside the fixed housing, and the end of the telescopic rod is fixedly connected to the side of the cleaning brush. The fixed rod is disposed between the fixed plate and the sliding block.

[0012] Preferably, the periodic rotation mechanism includes a rotary table, which is rotatably connected to the top of the base. A driven wheel is fixedly connected to the bottom of the rotary table, and a driving wheel is rotatably connected to the top of the base. A limit wheel and a drive column are fixedly connected to the top of the driving wheel. The drive column is slidably connected to the middle of the driven wheel. A second motor is installed at the bottom of the base, and the driving wheel is fixedly connected to the output end of the second motor.

[0013] Preferably, four XY-axis moving platforms are fixedly connected to the top of the rotary table, and the four collection buckets are respectively fixedly connected to the moving surfaces of the XY-axis moving platforms.

[0014] Preferably, the driven wheel has a U-shaped groove in the middle, and the drive column is slidably connected to the middle of the U-shaped groove.

[0015] Preferably, the bottom of the rotary table is provided with a positioning groove, and the top edge of the base is slidably connected to the middle of the positioning groove.

[0016] This invention provides a high-efficiency filtration and separation device for the resource recovery of bio-based lactic acid from kitchen waste. It has the following beneficial effects: 1. This invention, by setting up a rotary homogenizing crushing mechanism, uses a motor to drive the rotating frame to revolve. Simultaneously, through the meshing and linkage of gears one and two with the internal gear ring in the revolution-rotation transmission assembly, the stirring frame achieves a powerful rotation. This combined revolution and rotation motion drives the cutting blades and scrapers to comprehensively crush and scrape the materials in the raw material tank, which can efficiently process tough fibers and particles, eliminate the potential for subsequent pipeline blockage from the source, and significantly improve the efficiency of the separation process.

[0017] 2. This invention cleverly utilizes the kinetic energy of the fluid flowing through the feed pipe to drive the impeller to rotate by setting a self-cleaning filtration mechanism. The impeller then drives the cleaning brush to continuously clean the filter screen. At the same time, the elastic pressure applied to the sliding block by the spring in the adaptive elastic component ensures that the cleaning brush is always in close contact with the surface of the filter screen, and it can retract and avoid when encountering hard particles, thus avoiding the risk of jamming and stopping. This achieves a zero-energy-consumption and highly reliable online anti-clogging function.

[0018] 3. This invention, by setting up a periodic rotation mechanism, uses a motor to drive the drive wheel, whose drive column intermittently engages with the U-shaped groove on the driven wheel, and is precisely limited by a limiting wheel, to achieve stable and reliable step-by-step rotation of the rotary table. This automatically switches the collection bucket below. At the same time, the XY-axis moving stage set on the rotary table can precisely adjust the position of the collection bucket, ensuring accurate alignment between the discharge port and the bucket opening. Ultimately, this achieves complete automation of the material collection process and reduces labor costs. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the high-pressure pump of the present invention; Figure 3 This is a schematic diagram of the top cover of the present invention; Figure 4 This is a schematic diagram of the rotary homogenizing crushing mechanism of the present invention; Figure 5 This is a schematic diagram of the internal toothed ring of the present invention; Figure 6 This is a schematic diagram of the material conveying pipe of the present invention; Figure 7 This is a schematic diagram of the self-cleaning filter mechanism of the present invention; Figure 8 This is a schematic diagram of the structure of the fixing rod of the present invention; Figure 9 This is a schematic diagram of the structure of the rotary table of the present invention; Figure 10 This is a schematic diagram of the periodic rotation mechanism of the present invention; Figure 11 This is a schematic diagram of the driven wheel of the present invention.

[0020] The components include: 1. mounting frame; 2. raw material tank; 3. top cover; 4. Rotary homogenizing crushing mechanism; 401. Rotating frame; 402. Mixing frame; 403. Cutting blade; 404. Scraper; 405. Motor 1; 406. Gear 1; 407. Gear 2; 408. Internal gear ring; 5. Material conveying pipe; 6. Self-cleaning filter mechanism; 601. Filter screen; 602. Impeller; 603. Fixed housing; 604. Cleaning brush; 605. Fixed plate; 606. Fixed rod; 607. Sliding block; 608. Connecting rod; 609. Spring; 610. Telescopic rod; 7. Base; 8. Periodic rotation mechanism; 801. Rotary table; 802. Driven wheel; 803. Driving wheel; 804. Limiting wheel; 805. Drive column; 806. Motor II; 807. U-shaped groove; 808. Positioning groove; 809. XY axis moving table; 9. Collection tank; 10. Water pump; 11. Primary filter; 12. High-pressure pump; 13. Ultrafiltration membrane; 14. Nanofiltration membrane; 15. Discharge valve. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 - Appendix Figure 11 This invention provides a high-efficiency filtration and separation device for preparing bio-based lactic acid from kitchen waste, including a mounting frame 1, a raw material tank 2 and a base 7 installed in the middle of the mounting frame 1, a top cover 3 provided on the top of the raw material tank 2, and a rotary homogenizing crushing mechanism 4 installed at the bottom of the top cover 3 for crushing fibers and particles in the raw material and scraping off the adhering substances on the inner wall. The rotary homogenizing crushing mechanism 4 includes a rotating frame 401, which is rotatably connected to the bottom of the top cover 3. A stirring frame 402 is rotatably connected to the middle of the rotating frame 401. A cutting blade 403 and a scraper 404 are fixedly connected to the middle of the stirring frame 402. A motor 405 is installed on the top of the top cover 3. The rotating frame 401 is fixedly connected to the output end of the motor 405. A revolution and rotation transmission assembly is installed on the outer side of the rotating frame 401. The bottom of the raw material tank 2 is fixedly connected to a conveying pipe 5. The end of the conveying pipe 5 is equipped with a self-cleaning filter mechanism 6, which is used to filter the broken fibers and particles in the raw material and prevent the conveying pipe 5 from clogging. The top of the base 7 is equipped with a periodic rotating mechanism 8, and four collection buckets 9 are set on the top of the periodic rotating mechanism 8. The periodic rotating mechanism 8 is used to periodically switch the collection buckets 9. The mounting frame 1 is equipped with a water pump 10, a primary filter 11, a high-pressure pump 12, an ultrafiltration membrane 13, a nanofiltration membrane 14, and a discharge valve 15 in the middle. The feed pipe 5, water pump 10, primary filter 11, high-pressure pump 12, ultrafiltration membrane 13, nanofiltration membrane 14, and discharge valve 15 are connected in sequence through pipes. The discharge pipe connected to the output end of the discharge valve 15 is located above one of the collection tanks 9.

[0023] Specifically, there are two mixing racks 402. When the motor 405 drives the rotating frame 401 to rotate, the two mixing racks 402 revolve around the rotating frame 401.

[0024] Please see the appendix Figure 3 - Appendix Figure 5 In a preferred embodiment of the present invention, the revolution and rotation transmission assembly includes a first gear 406, which is fixedly connected to the outside of the rotating frame 401. A second gear 407 is fixedly connected to the top of the stirring frame 402, and an internal gear ring 408 is fixedly connected to the bottom of the top cover 3. Both the first gear 406 and the internal gear ring 408 mesh with the second gear 407.

[0025] Specifically, with the cooperation of gear 1 406, gear 2 407 and internal gear ring 408, the stirring frame 402 connected to gear 2 407, carrying the cutting blade 403 and scraper 404, revolves around the revolution while rotating on its own center.

[0026] Please see the appendix Figure 6 - Appendix Figure 8 In a preferred embodiment of the present invention, the self-cleaning filter mechanism 6 includes a filter screen 601, which is fixedly connected to the end of the feed pipe 5. An impeller 602 is rotatably connected to the side of the filter screen 601. The impeller 602 is rotatably connected to the inside of the feed pipe 5. A fixed housing 603 is fixedly connected to the rotating shaft of the impeller 602. A cleaning brush 604 is connected to the middle of the fixed housing 603 through an adaptive elastic component. The side of the filter screen 601 near the impeller 602 is in contact with the cleaning brush 604.

[0027] Specifically, when the fermentation liquid is output from the raw material tank 2, it passes through the filter screen 601 to filter out residual fibers and particles. The flow of the fermentation liquid impacts the impeller 602, and the kinetic energy generated by the flow controls the rotation of the impeller 602. The impeller 602 then drives the cleaning brush 604 to rotate synchronously through the fixed shell 603, so that the cleaning brush 604 removes the deposits on the filter screen 601.

[0028] Please see the appendix Figure 6 - Appendix Figure 8 In a preferred embodiment of the present invention, the adaptive elastic component includes a fixing plate 605, which is fixedly connected to the inside of the fixing shell 603. A fixing rod 606 is fixedly connected to the side of the fixing plate 605. A sliding block 607 is slidably connected to the outside of the fixing rod 606. A connecting rod 608 is rotatably connected to the side of the sliding block 607. The connecting rod 608 is rotatably connected to the side of the cleaning brush 604. A spring 609 is sleeved on the outer periphery of the fixing rod 606.

[0029] Specifically, the elastic pressure of the spring 609 is transmitted to the cleaning brush 604 through the sliding block 607 and the connecting rod 608, so that it is in close contact with the filter screen 601. At the same time, it can also retract when it encounters hard particles to avoid jamming and stopping.

[0030] Please see the appendix Figure 6 - Appendix Figure 8 In a preferred embodiment of the present invention, a telescopic rod 610 is fixedly connected inside the fixed shell 603, the end of the telescopic rod 610 is fixedly connected to the side of the cleaning brush 604, and the fixed rod 606 is disposed between the fixed plate 605 and the sliding block 607.

[0031] Specifically, by setting the telescopic rod 610, the movement trajectory of the cleaning brush 604 is limited, preventing the cleaning brush 604 from tilting.

[0032] Please see the appendix Figure 9 - Appendix Figure 11 In a preferred embodiment of the present invention, the periodic rotation mechanism 8 includes a rotating platform 801, which is rotatably connected to the top of the base 7. A driven wheel 802 is fixedly connected to the bottom of the rotating platform 801. A driving wheel 803 is rotatably connected to the top of the base 7. A limit wheel 804 and a drive column 805 are fixedly connected to the top of the driving wheel 803. The drive column 805 is slidably connected to the middle of the driven wheel 802. A second motor 806 is installed at the bottom of the base 7. The driving wheel 803 is fixedly connected to the output end of the second motor 806.

[0033] Specifically, the motor rotates the drive wheel 803, which in turn rotates the limit wheel 804 and the drive column 805. When the drive column 805 slides into the driven wheel 802, it pushes the driven wheel 802 to rotate. When the drive column 805 slides out of the driven wheel 802, the driven wheel 802 stops rotating with the help of the limit wheel 804. During this process, the driven wheel 802 rotates 90 degrees.

[0034] Please see the appendix Figure 9 - Appendix Figure 11 In a preferred embodiment of the present invention, four XY-axis moving stages 809 are fixedly connected to the top of the rotary table 801, and four collection buckets 9 are respectively fixedly connected to the moving surfaces of the XY-axis moving stages 809.

[0035] Specifically, the XY axis moving stage 809 mainly consists of a base, mutually perpendicular X-axis and Y-axis slides, linear guide rails, ball screws and drive motors. This is existing technology and will not be described in detail here. The XY axis moving stage 809 can precisely adjust the position of the collection bucket 9 so that the collection bucket 9 is aligned with the discharge pipe of the discharge valve 15.

[0036] Please see the appendix Figure 9 - Appendix Figure 11 In a preferred embodiment of the present invention, a U-shaped groove 807 is provided in the middle of the driven wheel 802, and the drive column 805 is slidably connected to the middle of the U-shaped groove 807.

[0037] Specifically, by setting a U-shaped groove 807, space is provided for the drive column 805 to slide into the driven wheel 802, while limiting the trajectory of the drive column 805 sliding in the driven wheel 802.

[0038] Please see the appendix Figure 9 - Appendix Figure 11 In a preferred embodiment of the present invention, a positioning groove 808 is provided at the bottom of the rotary table 801, and the top edge of the base 7 is slidably connected to the middle part of the positioning groove 808.

[0039] Specifically, by setting a positioning groove 808, which works in conjunction with the top edge of the base 7, the rotation position of the rotary table 801 is limited, preventing the rotary table 801 from shifting off the center of the base 7 when it rotates.

[0040] Working principle: When the fermentation broth is stored in the raw material tank 2, the motor 405 is started to drive the rotating frame 401 and gear 406 to rotate. The rotating frame 401 controls the stirring frame 402 and its cutting blade 403 and scraper 404 to revolve around gear 406. At the same time, the gear 407 on the top of the stirring frame 402 cooperates with gear 406 and internal gear ring 408 to control the stirring frame 402 to rotate around itself. The simultaneous rotation of the stirring frame 402, the cutting blade 403 and the scraper 404 achieve efficient stirring of the raw broth in the raw material tank 2, reduce the deposits on the inner wall of the raw material tank 2, stabilize and cut the tough plant fibers, incompletely decomposed particles and clumps contained in the fermentation broth, improve the efficiency of filtration and separation, scrape off the deposits on the inner wall of the raw material tank 2, prevent the deposits from corroding the raw material tank 2, and extend the service life of the raw material tank 2.

[0041] When the fermentation liquid in the raw material tank 2 is discharged, the flowing liquid impacts the impeller 602, driving the impeller 602 to rotate. The rotating impeller 602 drives the cleaning brush 604 to rotate simultaneously through the fixed housing 603, so that the cleaning brush 604 cleans the residue on the filter screen 601 and prevents the filter screen 601 from clogging. At the same time, the cleaning brush 604 is connected to the fixed housing 603 through the fixed plate 605, the fixed rod 606, the sliding block 607 and the connecting rod 608. The fixed rod 606 is equipped with a spring 609. The pressure applied by the spring 609 to the sliding block 607 makes the cleaning brush 604 subject to an elastic pressure, so that it always keeps in close contact with the surface of the filter screen 601. Even if it encounters hard particles, it can retract and avoid them, avoiding jamming. This achieves zero-energy self-cleaning, effectively preventing the filter screen 601 from clogging and avoiding affecting the efficiency of the work.

[0042] When a certain amount of product liquid has been collected in the collection tank 9, the motor 806 drives the limit wheel 804 and the drive column 805 to rotate one revolution through the drive wheel 803. This causes the drive column 805 to slide into the driven wheel 802, pushing the driven wheel 802 and causing it to rotate with the collection tank 9 via the rotary table 801. When the drive column 805 slides out of the driven wheel 802, the driven wheel 802, the rotary table 801, and the collection tank 9 stop rotating through the cooperation of the limit wheel 804. During this process, the rotary table 801 rotates 90 degrees, switching the next empty collection tank 9 to the discharge position for product liquid collection. At the same time, the position of the collection tank 9 can be precisely adjusted by the XY axis moving table 809 on the rotary table 801, so that the collection tank 9 is aligned with the discharge pipe of the discharge valve 15. This achieves periodic automatic rotation and switching of the collection tank 9, improving the automation level and working efficiency of the device and reducing labor costs.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid, comprising a mounting frame (1), characterized in that, The mounting frame (1) is equipped with a raw material tank (2) and a base (7) in the middle. The top of the raw material tank (2) is provided with a top cover (3). The bottom of the top cover (3) is equipped with a rotary homogenizing crushing mechanism (4) for crushing fibers and particles in the raw material and scraping off the adhering substances on the inner wall. The rotary homogenizing crushing mechanism (4) includes a rotating frame (401), which is rotatably connected to the bottom of the top cover (3). A stirring frame (402) is rotatably connected to the middle of the rotating frame (401). A cutting blade (403) and a scraper (404) are fixedly connected to the middle of the stirring frame (402). A motor (405) is installed on the top of the top cover (3). The rotating frame (401) is fixedly connected to the output end of the motor (405). A revolution and rotation transmission assembly is installed on the outer side of the rotating frame (401). The bottom of the raw material tank (2) is fixedly connected to a conveying pipe (5), and the end of the conveying pipe (5) is equipped with a self-cleaning filter mechanism (6) for filtering broken fibers and particles in the raw material, while avoiding blockage of the conveying pipe (5). The top of the base (7) is equipped with a periodic rotation mechanism (8), and the top of the periodic rotation mechanism (8) is provided with four collection buckets (9). The periodic rotation mechanism (8) is used to periodically switch the collection buckets (9). The mounting frame (1) is provided with a water pump (10), a primary filter (11), a high-pressure pump (12), an ultrafiltration membrane (13), a nanofiltration membrane (14), and a discharge valve (15) in the middle. The feed pipe (5), the water pump (10), the primary filter (11), the high-pressure pump (12), the ultrafiltration membrane (13), the nanofiltration membrane (14), and the discharge valve (15) are connected in sequence by pipes. The discharge pipe connected to the output end of the discharge valve (15) is located above one of the collection buckets (9).

2. The high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid according to claim 1, characterized in that, The revolution and rotation transmission assembly includes a first gear (406), which is fixedly connected to the outside of the rotating frame (401). A second gear (407) is fixedly connected to the top of the stirring frame (402), and an internal gear ring (408) is fixedly connected to the bottom of the top cover (3). Both the first gear (406) and the internal gear ring (408) mesh with the second gear (407).

3. The high-efficiency filtration and separation device for preparing bio-based lactic acid from kitchen waste according to claim 1, characterized in that, The self-cleaning filter mechanism (6) includes a filter screen (601), which is fixedly connected to the end of the feed pipe (5). An impeller (602) is rotatably connected to the side of the filter screen (601). The impeller (602) is rotatably connected to the inside of the feed pipe (5). A fixed housing (603) is fixedly connected to the rotating shaft of the impeller (602). A cleaning brush (604) is connected to the middle of the fixed housing (603) through an adaptive elastic component. The side of the filter screen (601) near the impeller (602) is in contact with the cleaning brush (604).

4. The high-efficiency filtration and separation device for preparing bio-based lactic acid from kitchen waste according to claim 3, characterized in that, The adaptive elastic component includes a fixing plate (605) which is fixedly connected to the inside of the fixing shell (603). A fixing rod (606) is fixedly connected to the side of the fixing plate (605). A sliding block (607) is slidably connected to the outside of the fixing rod (606). A connecting rod (608) is rotatably connected to the side of the sliding block (607). The connecting rod (608) is rotatably connected to the side of the cleaning brush (604). A spring (609) is sleeved on the outer periphery of the fixing rod (606).

5. The high-efficiency filtration and separation device for preparing bio-based lactic acid from kitchen waste according to claim 4, characterized in that, A telescopic rod (610) is fixedly connected inside the fixed housing (603). The end of the telescopic rod (610) is fixedly connected to the side of the cleaning brush (604). The fixed rod (606) is disposed between the fixed plate (605) and the sliding block (607).

6. The high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid according to claim 1, characterized in that, The periodic rotation mechanism (8) includes a rotating platform (801), which is rotatably connected to the top of the base (7). A driven wheel (802) is fixedly connected to the bottom of the rotating platform (801). A driving wheel (803) is rotatably connected to the top of the base (7). A limit wheel (804) and a drive column (805) are fixedly connected to the top of the driving wheel (803). The drive column (805) is slidably connected to the middle of the driven wheel (802). A second motor (806) is installed at the bottom of the base (7). The driving wheel (803) is fixedly connected to the output end of the second motor (806).

7. The high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid according to claim 6, characterized in that, Four XY-axis moving stages (809) are fixedly connected to the top of the rotary table (801), and the four collection buckets (9) are respectively fixedly connected to the moving surfaces of the XY-axis moving stages (809).

8. The high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid according to claim 6, characterized in that, The driven wheel (802) has a U-shaped groove (807) in the middle, and the drive column (805) is slidably connected to the middle of the U-shaped groove (807).

9. The high-efficiency filtration and separation device for the resource utilization of kitchen waste to prepare bio-based lactic acid according to claim 6, characterized in that, The bottom of the rotating platform (801) is provided with a positioning groove (808), and the top edge of the base (7) is slidably connected to the middle of the positioning groove (808).

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