An extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities

Abstract

This invention relates to the field of food waste resource utilization technology, and particularly to a compression dehydration and oil extraction device for secondary treatment of food waste impurities. The device includes a processing tank, an iron stirring rod with stirring blades mounted on it, a partition inside the processing tank, and a filter cartridge between the partition and the processing tank. A drain pipe is located on the side of the processing tank, and an impurity input pipe is located on the side of the filter cartridge. This invention utilizes a rotatable and axially movable stirring assembly, allowing the stirring blades to perform layered stirring of food waste impurities at different heights. This achieves thorough mixing and oil desorption of different areas inside and on the surface of the impurities. After layered stirring, the stirring assembly moves upwards to avoid obstruction and works in conjunction with the compression assembly to apply axial compression force to the impurities, further squeezing out the oily liquid remaining inside the impurities after layered stirring, thus achieving deep dehydration.

Description

Technical Field

[0001] This invention relates to the field of food waste resource utilization technology, specifically a squeeze dehydration and oil extraction device for secondary treatment of food waste impurities. Background Technology

[0002] The disposal of food waste typically includes stages such as receiving and temporary storage, coarse separation, fine separation and pulping, impurity and sand removal, oil-water separation, and subsequent resource recovery. The grease obtained from oil-water separation can be further processed into energy products such as biodiesel; therefore, the grease recovery rate from food waste directly affects the economic efficiency of the treatment system. In existing food waste pretreatment processes, large-particle impurities, plastic bags, packaging materials, and bones are usually separated and discharged as solid impurities during the coarse separation or impurity removal stage. However, these impurities often have a large amount of grease adhering to their surfaces. Direct incineration or landfill disposal not only wastes grease resources but also increases the environmental burden.

[0003] To improve oil extraction rates, existing technologies have attempted secondary washing or sieving of the aforementioned impurities. However, current solutions largely rely on simple stirring and natural drainage, leaving a significant amount of oily liquid residue in the impurities, resulting in limited dehydration effectiveness. Furthermore, these methods often require independent dehydration equipment, leading to complex systems and high energy consumption. Therefore, achieving thorough removal of residual oily liquid from kitchen waste without significantly increasing equipment size and operating costs remains a pressing issue that needs to be addressed in current technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a compression dehydration and oil extraction device for secondary treatment of kitchen waste, aiming to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An extrusion dehydration and oil extraction device for secondary treatment of kitchen waste includes a processing box, an iron stirring rod, and a stirring blade installed on the iron stirring rod. The processing box is equipped with a partition, and a filter cylinder is arranged between the partition and the processing box. A drain pipe is arranged on the side of the processing box, and an impurity input pipe is arranged on the side of the filter cylinder.

[0007] The surface of the processing box is equipped with a bearing seat, and a rotating hollow rod is rotatably connected inside the bearing seat. The iron stirring rod is slidably connected inside the rotating hollow rod. A first electromagnet sleeve is sleeved on the outside of the iron stirring rod. The first electromagnet sleeve and the processing box are jointly provided with a drive assembly for driving the first electromagnet sleeve to rotate.

[0008] The surface of the processing box is provided with an automatic lifting component, which is used to drive the iron stirring rod to slide inside the rotating hollow rod when the first electromagnet sleeve is de-energized.

[0009] The partition is provided with an extrusion assembly, which includes a hydraulic telescopic rod installed on the surface of the partition, and one end of the hydraulic telescopic rod is connected to an extrusion plate. The surface of the extrusion plate has a first through hole, and a cover plate is slidably connected to the surface of the extrusion plate. A first electric telescopic rod is installed on the surface of the extrusion plate.

[0010] Furthermore, the width of the first through hole is greater than the width of the stirring blade.

[0011] Furthermore, the drive assembly includes a drive motor mounted on the surface of the processing box, and a transmission gear is mounted on the output end of the drive motor. A transmission gear ring is sleeved on the outer side of the first electromagnet sleeve, and the transmission gear ring meshes with the transmission gear.

[0012] Furthermore, the automatic lifting assembly includes a second electric telescopic rod installed on the surface of the processing tank, and a support frame is provided at one end of the second electric telescopic rod. Two second electromagnet sleeves that are slidably connected to the surface of the iron stirring rod are installed on the surface of the support frame.

[0013] Furthermore, the iron stirring rod is in close contact with the inner wall of the rotating hollow rod and the second electromagnet sleeve.

[0014] Furthermore, the extrusion assembly also includes a T-shaped groove on the surface of the extrusion plate, and a T-shaped slider is installed on the surface of the cover plate. The cover plate is slidably connected to the surface of the extrusion plate through the cooperation of the T-shaped slider and the T-shaped groove, and the telescopic end of the first electric telescopic rod is connected to the surface of the cover plate.

[0015] Furthermore, a second through hole is provided on the surface of the partition.

[0016] Furthermore, the surface of the iron stirring rod is provided with an anti-corrosion coating.

[0017] Furthermore, a liquid injection pipe is connected to the side of the processing box, and a flow meter is installed on the surface of the liquid injection pipe.

[0018] Furthermore, a spiral output machine is provided on the side of the processing box, and one end of the spiral output machine is designed to be open, with the opening connected to the interior of the filter cartridge.

[0019] The present invention provides an extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities, which has the following beneficial effects:

[0020] This invention employs a rotatable and axially adjustable stirring assembly, allowing the stirring blades to perform layered stirring of kitchen waste impurities at different heights. This ensures thorough mixing and grease desorption of different areas within and on the surface of the impurities. After layered stirring, the stirring assembly moves upwards to avoid obstructing the flow and works in conjunction with an extrusion assembly to apply axial pressure to the impurities. This further squeezes out any remaining oily liquid within the impurities after layered stirring, achieving deep dehydration. Through the dual effects of layered stirring and extrusion dehydration, this invention significantly reduces the residual liquid content of impurities and increases the overall oil extraction rate within the same processing space. With its compact structure and stable operation, it is suitable for the efficient resource recovery of large-particle impurities during the pretreatment of kitchen waste, demonstrating significant engineering application value and economic benefits. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a squeeze dehydration and oil extraction device for secondary treatment of kitchen waste.

[0022] Figure 2 This is a schematic diagram of the extrusion plate, the first electric telescopic rod, and the cover plate in an extrusion dehydration and oil extraction device for secondary treatment of kitchen waste.

[0023] In the diagram: 1. Working platform; 2. Drain pipe; 3. Processing tank; 4. Injection pipe; 5. Second through hole; 6. Transmission gear ring; 7. Second electric telescopic rod; 8. Support frame; 9. Second electromagnet sleeve; 10. First electromagnet sleeve; 11. Transmission gear; 12. Drive motor; 13. Hydraulic telescopic rod; 14. Bearing seat; 15. Rotating hollow rod; 16. Iron stirring rod; 17. Extrusion plate; 18. First through hole; 19. Stirring blade; 20. Filter cartridge; 21. Spiral output machine; 22. Impurity input pipe; 23. Cover plate; 24. First electric telescopic rod; 25. Partition plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] like Figures 1-2As shown in the figure, an embodiment of the present invention provides a squeeze dehydration and oil extraction device for secondary treatment of kitchen waste, including a processing box 3 and an iron stirring rod 16. The processing box 3 is set on a working platform 1, and a stirring blade 19 is installed on the iron stirring rod 16. A partition 25 is provided inside the processing box 3, and a filter cylinder 20 is provided between the partition 25 and the processing box 3. A drain pipe 2 is provided on the side of the processing box 3, and an impurity input pipe 22 is provided on the side of the filter cylinder 20. A liquid injection pipe 4 is connected to the side of the processing box 3.

[0027] A bearing seat 14 is mounted on the surface of the processing tank 3, and a rotating hollow rod 15 is rotatably connected inside the bearing seat 14. An iron stirring rod 16 is slidably connected inside the rotating hollow rod 15. A first electromagnet sleeve 10 is sleeved on the outside of the iron stirring rod 16. The first electromagnet sleeve 10 and the processing tank 3 are jointly provided with a drive assembly for driving the first electromagnet sleeve 10 to rotate. The drive assembly includes a drive motor 12 mounted on the surface of the processing tank 3, and a transmission gear 11 is mounted on the output end of the drive motor 12. A transmission gear ring 6 is sleeved on the outside of the first electromagnet sleeve 10, and the transmission gear ring 6 is meshed with the transmission gear 11.

[0028] The surface of the processing tank 3 is equipped with an automatic lifting assembly, which is used to drive the iron stirring rod 16 to slide inside the rotating hollow rod 15 when the first electromagnet sleeve 10 is de-energized. The automatic lifting assembly includes a second electric telescopic rod 7 installed on the surface of the processing tank 3, and a support frame 8 is provided at one end of the second electric telescopic rod 7. Two second electromagnet sleeves 9 are slidably connected to the surface of the iron stirring rod 16 on the surface of the support frame 8. The iron stirring rod 16 is in close contact with the inner walls of the rotating hollow rod 15 and the second electromagnet sleeves 9.

[0029] A pressing assembly is provided on the partition 25. The pressing assembly includes a hydraulic telescopic rod 13 mounted on the surface of the partition 25, and one end of the hydraulic telescopic rod 13 is connected to a pressing plate 17. A first through hole 18 is formed on the surface of the pressing plate 17, and the width of the first through hole 18 is greater than the width of the stirring blade 19. A cover plate 23 is slidably connected to the surface of the pressing plate 17, and a first electric telescopic rod 24 is mounted on the surface of the pressing plate 17.

[0030] In one embodiment of the present invention, the operation of this device is as follows:

[0031] First, kitchen waste with a lot of grease on its surface (such as plastic bags, large particles, large bones, etc.) is fed into the interior of the filter cartridge 20 through the waste inlet pipe 22, so that the waste directly enters the filter cartridge 20 for processing and does not enter the interior space of the processing box 3.

[0032] After loading an appropriate amount of impurities into the filter cartridge 20, the liquid separated by the three-phase centrifuge of the catering enterprise is injected into the treatment tank 3 through the liquid injection pipe 4. The temperature of the liquid is usually 70-80℃. While providing a cleaning medium for the impurities, it also heats, softens and promotes the dissolution of the grease attached to the surface of the impurities.

[0033] The mixing process then begins. Initially, the stirring blades 19 are located in the upper part of the filter cylinder 20 and below the extrusion plate 17. At this time, the first electromagnet sleeve 10 is energized, while the two second electromagnet sleeves 9 are de-energized. Under the electromagnetic attraction force generated by the first electromagnet sleeve 10, the iron stirring rod 16 is reliably attracted and fixed inside the rotating hollow rod 15. Subsequently, the drive motor 12 is started, which drives the transmission gear 11 to rotate. The transmission gear 11 drives the transmission gear ring 6 to rotate, thereby causing the first electromagnet sleeve 10, the rotating hollow rod 15, and the fixed iron stirring rod 16 to rotate synchronously. This allows the stirring blades 19 on the iron stirring rod 16 to mix the impurities inside the filter cylinder 20, ensuring that the grease on the surface of the impurities is fully removed and mixed into the liquid.

[0034] During the stirring process, the automatic lifting assembly is used to adjust the axial position of the iron stirring rod 16 and the stirring blade 19, so as to perform stratified stirring of impurities in different height areas within the filter cartridge 20. Specifically, when it is necessary to adjust the stirring height, one of the two second electromagnet sleeves 9 is first energized to axially limit the iron stirring rod 16. Then, the first electromagnet sleeve 10 is de-energized, releasing the iron stirring rod 16 from its fixed position. Next, the second electric telescopic rod 7 is activated, which drives the support frame 8 and the corresponding second electromagnet sleeve 9 to move axially, thereby moving the iron stirring rod 16 and the stirring blade 19 up or down to the predetermined position. Subsequently, the first electromagnet sleeve 10 is energized again and the second electromagnet sleeve 9 is de-energized, so that the iron stirring rod 16 is re-fixed and participates in rotational stirring. Through multiple position adjustments, the impurities in different areas within the filter cartridge 20 can be fully stirred, improving the oil desorption efficiency.

[0035] After the stirring process is completed, the oil in the liquid has been basically dissolved into the liquid phase. At this time, the oily liquid can be discharged by opening the drain pipe 2. However, relying solely on natural drainage, a large amount of oily liquid will still remain and adhere to the surface of impurities or linger in the gaps between impurities, resulting in insufficient oil extraction.

[0036] To solve the above problems, this device uses the coordinated operation of an automatic lifting assembly and a squeezing assembly to squeeze and dehydrate impurities. The specific process is as follows: First, based on the position of the first through hole 18, the axial position of the iron stirring rod 16 and the stirring blade 19 is adjusted so that the final position of the stirring blade 19 is aligned with the first through hole 18; then, according to the aforementioned lifting method, the iron stirring rod 16 and the stirring blade 19 are gradually moved upward until the stirring blade 19 passes through the first through hole 18 and is located in the area above the squeezing plate 17.

[0037] After the stirring blade 19 completes its upward movement to avoid obstruction, the first electric telescopic rod 24 is activated, causing the cover plate 23 to move and block the first through hole 18, preventing impurities or liquid from flowing back through the first through hole 18 during the extrusion process. Subsequently, the hydraulic telescopic rod 13 is activated, driving the extrusion plate 17 to move downward, so that the extrusion plate 17, together with the cover plate 23, applies axial extrusion force to the impurities in the filter cartridge 20. Under the extrusion action, the oily liquid remaining in the impurities is further squeezed out and discharged through the filter cartridge 20, thereby achieving deep dehydration.

[0038] After extrusion is completed, the extrusion plate 17 is reset and the cover plate 23 is removed from the first through hole 18. Then, the iron stirring rod 16 and stirring blade 19 are returned to the initial stirring position for the next cycle of processing.

[0039] It should be noted that during the rotation process, the iron stirring rod 16 is in close but not rigidly pressed fit with the rotating hollow rod 15 and the inner wall of the second electromagnet sleeve 9. In the rotating state, the iron stirring rod 16 is mainly provided with axial fixation and radial constraint by the first electromagnet sleeve 10, thereby avoiding large frictional resistance between the iron stirring rod 16 and the inner wall of the second electromagnet sleeve 9 or the first electromagnet sleeve 10, and ensuring that the rotation process is stable and reliable.

[0040] Both the second electromagnet sleeve 9 and the first electromagnet sleeve 10 can adopt an enclosed sleeve structure, with several electromagnet blocks inside. By controlling the on and off of different electromagnet blocks, the selective fixing, release, and limiting of the iron stirring rod 16 can be achieved, thereby ensuring reliable switching between lifting and rotating actions.

[0041] To prevent impurities from tangling or accumulating during the mixing process, the device can rotate the stirring blade 19 alternately clockwise and counterclockwise as needed, thereby further improving the uniformity of mixing and the stability of the process.

[0042] Compared with existing kitchen waste treatment devices, the present invention has at least the following advantages:

[0043] By directly introducing impurities into the filter cartridge 20 for treatment, and avoiding impurities from entering the inner cavity of the treatment box 3, it is beneficial to achieve effective separation of liquid and solid and improve the stability of system operation.

[0044] The rotatable and axially movable iron stirring rod 16 and stirring blade 19 achieve stratified stirring of impurities, allowing the oil to be more fully separated from the surface of the impurities and improving the oil dissolution efficiency.

[0045] Through the coordinated operation of the automatic lifting component and the extrusion component, the impurities are axially extruded and dehydrated after stirring, which significantly reduces the residual oily liquid in the impurities and improves the overall oil extraction rate.

[0046] The mixing and extrusion are completed in stages within the same processing space, eliminating the need for additional independent dehydration equipment. The structure is compact and energy consumption is low. Before extrusion, the upward movement of the mixing blade 19 and the sealing design of the first through hole 18 prevent structural interference during the extrusion process, thereby improving the reliability of equipment operation.

[0047] This invention is applicable to the secondary treatment of large-particle impurities, packaging materials, and foreign objects in food waste pretreatment systems, and is particularly suitable for food waste resource recovery projects with high oil extraction rate requirements. This device can significantly reduce residual oily liquid in impurities, improve oil recovery rate, and reduce the load on subsequent incineration or landfill treatment, resulting in good economic and environmental benefits and broad engineering application prospects.

[0048] During the implementation of this device, it is important to note that before impurity treatment, impurities should be introduced into the interior of the filter cartridge 20 via the impurity input pipe 22, rather than directly into the inner cavity of the treatment chamber 3, to avoid interference from large-diameter impurities with other components. The amount of impurities loaded should not exceed the effective volume of the filter cartridge 20 to ensure sufficient subsequent stirring and extrusion processes.

[0049] The liquid injected through the injection pipe 4 should cover the main area of ​​impurities, but should not exceed the area below the extrusion plate 17, in order to prevent the liquid from flowing back to the non-treatment area during the extrusion stage, thereby affecting the extrusion and dehydration effect.

[0050] Before entering the extrusion and dehydration stage, the rotating agitator must be stopped and the first electromagnet sleeve 10 must be de-energized to release the iron agitator rod 16 from its rotating and fixed state. Then, the iron agitator rod 16 and the agitator blade 19 are moved upward by the automatic lifting assembly.

[0051] The extrusion step can only proceed after the stirring blade 19 has completely passed through the first through hole 18 and is located above the extrusion plate 17, so as to avoid interference or damage to the stirring blade 19 with the extrusion plate 17 or the cover plate 23 during the extrusion process.

[0052] Before starting the extrusion assembly, the cover plate 23 should be driven by the first electric telescopic rod 24 to block the first through hole 18 to prevent impurities or liquid from flowing back from the first through hole 18 during the extrusion process and affecting the extrusion effect.

[0053] During the extrusion process, the downward movement speed of the extrusion plate 17 should not be too fast, so as to ensure that the liquid can be gradually discharged along the structure of the filter cartridge 20 under the extrusion force, and avoid the collapse of the impurity structure or the blockage of the filter channel due to instantaneous extrusion.

[0054] After extrusion is completed, the extrusion plate 17 should be reset first and the cover plate 23 should be removed from the first through hole 18. Then, the iron stirring rod 16 and stirring blade 19 should be reset to avoid starting the rotating stirring before the stirring blade 19 is fully returned to its original position.

[0055] After completing one squeeze dehydration process, it should be confirmed that the iron stirring rod 16, stirring blade 19, squeezing plate 17 and cover plate 23 have all returned to their initial state before proceeding with the next batch of impurities, in order to ensure consistent operation and stable running between each processing cycle.

[0056] In this embodiment, the extrusion assembly further includes a T-shaped groove on the surface of the extrusion plate 17, a T-shaped slider is installed on the surface of the cover plate 23, and the cover plate 23 is slidably connected to the surface of the extrusion plate 17 through the cooperation of the T-shaped slider and the T-shaped groove. The telescopic end of the first electric telescopic rod 24 is connected to the surface of the cover plate 23.

[0057] Through the above structural design, the cover plate 23 can slide linearly in a restricted manner along the surface of the extrusion plate 17 under the drive of the first electric telescopic rod 24, thereby realizing the opening and sealing of the first through hole 18. The cooperation structure of the T-shaped groove and the T-shaped slider ensures that the cover plate 23 moves stably in the predetermined direction, while effectively preventing the cover plate 23 from tilting, shifting, or detaching from the extrusion plate 17 during the extrusion process, ensuring that the sealing action is performed reliably.

[0058] In this embodiment, a second through hole 5 is provided on the surface of the partition 25. By providing the second through hole 5 on the partition 25, a space is formed below the partition 25 to accommodate the axial movement and avoidance of the stirring blade 19. During the process of the iron stirring rod 16 driving the stirring blade 19 to move axially upward or downward, interference between the stirring blade 19 and the partition 25 can be avoided, thereby ensuring that the lifting and lowering process of the iron stirring rod 16 is smooth and reliable.

[0059] In this embodiment, the surface of the iron stirring rod 16 is provided with an anti-corrosion coating. By providing an anti-corrosion coating on the surface of the iron stirring rod 16, corrosion can be effectively inhibited when the iron stirring rod 16 is in long-term contact with kitchen processing liquids and impurities containing grease, acid, or alkaline components, thereby ensuring the structural strength and operational stability of the iron stirring rod 16 during rotation and axial movement.

[0060] In this embodiment, a flow meter is installed on the surface of the injection pipe 4. By installing a flow meter on the injection pipe 4, the flow rate of the liquid injected into the treatment tank 3 can be monitored and controlled in real time, so that the injection volume matches the amount of impurities loaded in the filter cartridge 20, thereby ensuring the stability and consistency of the stirring and extrusion dehydration process.

[0061] In this embodiment, a screw conveyor 21 is provided on the side of the processing box 3, and one end of the screw conveyor 21 is designed to be open, with the opening communicating with the interior of the filter cartridge 20. Through the above structural arrangement, impurities after the extrusion and dehydration treatment can directly enter the screw conveyor 21 from the interior of the filter cartridge 20 and be continuously output, thereby avoiding the accumulation of impurities in the processing chamber and ensuring the continuous operation capability of the device.

[0062] In this embodiment, an observation window is provided on the side of the processing box 3 to observe the relative positional relationship between the stirring blade 19 and the first through hole 18, so as to confirm or adjust the axial position of the iron stirring rod 16 before the extrusion dehydration process; in addition, the processing box 3 and the filter cylinder 20 are respectively provided with cleaning windows on their sides, so as to clean or guide the impurities remaining at the bottom of the filter cylinder 20 after the processing is completed, so that the residual impurities can smoothly enter the screw conveyor 21 and avoid the accumulation of impurities in the processing chamber.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for secondary treatment of kitchen waste by extrusion dehydration and oil extraction, comprising a processing tank (3) and an iron stirring rod (16), wherein the iron stirring rod (16) is equipped with stirring blades (19), characterized in that, The processing box (3) is provided with a partition (25) inside, and a filter cartridge (20) is provided between the partition (25) and the processing box (3). A drain pipe (2) is provided on the side of the processing box (3), and an impurity input pipe (22) is provided on the side of the filter cartridge (20). The surface of the processing box (3) is equipped with a bearing seat (14), and a rotating hollow rod (15) is rotatably connected inside the bearing seat (14). The iron stirring rod (16) is slidably connected inside the rotating hollow rod (15). A first electromagnet sleeve (10) is sleeved on the outside of the iron stirring rod (16). The first electromagnet sleeve (10) and the processing box (3) are jointly provided with a drive assembly for driving the first electromagnet sleeve (10) to rotate. The surface of the processing box (3) is provided with an automatic lifting component, and the automatic lifting component is used to drive the iron stirring rod (16) to slide inside the rotating hollow rod (15) when the first electromagnet sleeve (10) is de-energized; The partition (25) is provided with an extrusion assembly, which includes a hydraulic telescopic rod (13) installed on the surface of the partition (25), and one end of the hydraulic telescopic rod (13) is connected to an extrusion plate (17). The surface of the extrusion plate (17) is provided with a first through hole (18), and a cover plate (23) is slidably connected to the surface of the extrusion plate (17). The surface of the extrusion plate (17) is provided with a first electric telescopic rod (24).

2. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The width of the first through hole (18) is greater than the width of the stirring blade (19).

3. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The drive assembly includes a drive motor (12) mounted on the surface of the processing box (3), and a transmission gear (11) is mounted on the output end of the drive motor (12). A transmission gear ring (6) is sleeved on the outer side of the first electromagnet sleeve (10), and the transmission gear ring (6) meshes with the transmission gear (11).

4. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The automatic lifting assembly includes a second electric telescopic rod (7) installed on the surface of the processing box (3), and a support frame (8) is provided at one end of the second electric telescopic rod (7). A second electromagnet sleeve (9) is installed on the surface of the support frame (8) and is slidably connected to the surface of the iron stirring rod (16).

5. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 3, characterized in that, The iron stirring rod (16) is in close contact with the inner wall of the rotating hollow rod (15) and the second electromagnet sleeve (9).

6. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The extrusion assembly also includes a T-shaped groove on the surface of the extrusion plate (17), a T-shaped slider is installed on the surface of the cover plate (23), the cover plate (23) is slidably connected to the surface of the extrusion plate (17) through the cooperation of the T-shaped slider and the T-shaped groove, and the telescopic end of the first electric telescopic rod (24) is connected to the surface of the cover plate (23).

7. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The surface of the partition (25) is provided with a second through hole (5).

8. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The surface of the iron stirring rod (16) is provided with an anti-corrosion coating.

9. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The side of the treatment box (3) is connected to a liquid injection pipe (4), and a flow meter is installed on the surface of the liquid injection pipe (4).

10. The extrusion dehydration and oil extraction device for secondary treatment of kitchen waste impurities according to claim 1, characterized in that, The processing box (3) is provided with a spiral output machine (21) on its side, and one end of the spiral output machine (21) is designed to be open, and the opening is connected to the inside of the filter cartridge (20).

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