A fine separation device for kitchen waste

Abstract

This application relates to a fine separation device for kitchen waste, which relates to the field of kitchen waste treatment. It includes a feeding device, a screening device and a driving motor. The feeding device includes a feeding housing and a propulsion roller arranged inside the feeding housing. The feeding housing is fixed at one end of the screening device, and a feeding pipe connection structure is arranged on the side wall. A feeding screw is arranged on the propulsion roller. The screening device includes a screening housing, a transmission screw, a discharge end cover and a screen. An inlet hole is arranged at one end of the screening housing adjacent to the feeding device. A fine material collection mechanism and a coarse material collection mechanism are arranged at the lower part of the screening housing. The transmission screw is arranged inside the screening housing. The feeding screw is connected to one end of the transmission screw, and the other end of the transmission screw is connected to the discharge end cover. The screen is arranged outside the transmission screw and on the side where the fine material collection mechanism is located. The driving motor is arranged outside the screening housing and is drivingly connected to the discharge end cover, which can prevent the escape of odors and improve the fine separation effect of kitchen waste.

Description

Technical Field

[0001] This application relates to the field of food waste treatment, and in particular to a food waste fine separation device. Background Art

[0002] With the improvement of environmental protection requirements, in order to effectively treat domestic waste and reduce the impact of domestic waste on the environment, it is usually necessary to classify domestic waste. For food waste, it is usually first crushed by mechanical means, and then the fine materials and liquids in it are filtered out through a sieve and directly discharged, and the coarse materials and classified impurities that cannot be effectively crushed are separated for targeted treatment. Due to differences in regional policies and implementation efforts, the classification effects of food waste in different regions are different, and there are also differences in the collection and transportation conditions of food waste, resulting in differences in the materials faced when treating food waste. There is usually a certain amount of impurities that are difficult to crush, which affects the treatment effect of food waste.

[0003] When treating food waste, generally, the food waste is first pretreated, broken into pulp, and large impurities are removed, and then the pretreated slurry material is transported to a fine separation device for subsequent treatment. The fine separation device further crushes and finely separates the slurry material. The separated water and fine materials can be directly discharged, and the discharged coarse materials are sorted and classified for treatment, or directly landfilled.

[0004] In the existing food waste fine separation device, usually an inlet is provided at the upper part of the fine separation device housing, and a slurry passing port is also provided at the corresponding position of the sieve. When the slurry material enters the fine separation device through the inlet, the crushing and pushing structure is likely to interfere with the slurry material, causing the slurry material to splash out of the sieve, affecting the fine separation effect and causing the escape of food waste odor; the fine materials and coarse materials after fine separation are respectively discharged to a temporary storage device through discharge ports, and the odor of food waste escapes seriously; there are usually flexible impurities that are difficult to break remaining in the pretreated slurry material, which are likely to cause the flexible impurities to wind around the rotating shaft of the crushing and pushing structure, affecting the crushing and pushing effects of the crushing and pushing structure. Summary of the Invention

[0005] In order to reduce the escape of food waste odor and improve the fine separation effect of food waste, this application provides a food waste fine separation device.

[0006] The food waste fine separation device provided by this application adopts the following technical solutions:

[0007] A fine separation device for kitchen waste includes a feeding device, a screening device and a driving motor. The feeding device includes a feeding housing and a propulsion roller. The feeding housing is fixed at one end of the screening device and is provided with a feeding pipe connection structure on its side wall. The propulsion roller is arranged inside the feeding housing, and a feeding screw is arranged on the propulsion roller. The screening device includes a screening housing, a transmission screw, a discharge end cover and a screen. An inlet hole is arranged at one end of the screening housing adjacent to the feeding device. A fine material collection mechanism and a coarse material collection mechanism are arranged at the lower part of the screening housing. The transmission screw is arranged inside the screening housing. The feeding screw passes through the inlet hole and is connected to one end of the transmission screw. The other end of the transmission screw is connected to the discharge end cover. The screen is arranged outside the transmission screw and on the side where the fine material collection mechanism is located. The driving motor is arranged outside the screening housing and is drivingly connected to the discharge end cover.

[0008] By adopting the above technical solution, with the feeding device arranged at one end of the screening device, the pretreatment slurry of kitchen waste can be conveyed through the inlet hole to the inside of the screen and the transmission screw, avoiding the interference of the rotation of the transmission screw on the slurry material, preventing the splashing of the slurry material, and ensuring the fine separation effect of the slurry material. The feeding pipe connection structure can form a sealed connection between the pretreatment slurry conveying pipe and the feeding device, preventing the escape of the peculiar smell formed by the kitchen waste. With the fine material collection mechanism and the coarse material collection mechanism arranged at the lower part of the screening housing, it can ensure that the fine materials and coarse materials formed by fine separation are both inside the screening housing, preventing the escape of the peculiar smell of the kitchen waste. With the structure that the two ends of the transmission screw are respectively connected to the feeding screw and the discharge end cover, while ensuring the rotation of the feeding screw driven by the driving motor, the rotating shaft of the transmission screw is omitted, avoiding the winding of flexible impurities on the rotating shaft, and ensuring the crushing and propulsion effects of the transmission screw.

[0009] In a specific feasible embodiment, the fine material collection mechanism includes a fine material collection tank and a fine material discharge pipe. The fine material collection tank is integrally connected to the screening housing, and a fine material output hole is arranged on the fine material collection tank. The fine material discharge pipe passes through the fine material output hole and is hermetically connected to the fine material collection tank.

[0010] By adopting the above technical solution, with the fine material collection tank integrally connected to the lower part of the screening housing and the structure that the fine material discharge pipe is hermetically connected to the fine material collection tank, it can realize the isolation of the fine material collection tank from the external environment, preventing the escape of the peculiar smell of the fine materials collected in the fine material collection tank.

[0011] In a specific feasible implementation, the coarse material collection mechanism includes a coarse material collection tank and a screw conveyor. The coarse material collection tank is integrally connected to the screening housing, and a coarse material output hole is provided on the coarse material collection tank. The screw conveyor passes through the coarse material output hole and is hermetically connected to the coarse material collection tank.

[0012] By adopting the above technical solution, with the structure that the coarse material collection tank is integrally connected to the lower part of the screening housing and the screw conveyor is hermetically connected to the coarse material collection tank, it is possible to isolate the coarse material collection tank from the external environment and prevent the odor of the coarsely screened materials collected in the coarse material collection tank from escaping.

[0013] In a specific feasible implementation, the discharge end cover includes an end cover plate and an end cover shaft. The end cover shaft is fixed on one side of the end cover plate, and the transmission screw is connected to the other side of the end cover plate. The end cover shaft passes through the screening housing and is connected to the driving motor, and a packing seal box is provided between the end cover shaft and the screening housing.

[0014] By adopting the above technical solution, the end cover plate can form a stable connection between the discharge end cover and the conveying screw, so that the rotational torque of the driving motor can be transmitted to the conveying screw without using a rotating shaft, realizing the reliable rotation of the conveying screw. The packing seal box can achieve reliable sealing between the end cover shaft and the screening housing, reducing the escape of the odor of kitchen waste in the screening housing.

[0015] In a specific feasible implementation, the driving motor is connected to the end cover shaft through a coupling.

[0016] By adopting the above technical solution, the coupling can achieve reliable torque transmission between the driving motor and the end cover shaft, reduce the rotational vibration caused by the connection deviation between the output shaft of the driving motor and the end cover shaft, reduce the equipment noise, and improve the torque transmission efficiency.

[0017] In a specific feasible implementation, one end of the propulsion roller is provided with a propulsion roller shaft. The propulsion roller shaft passes through the feeding housing and is rotatably connected to a roller shaft support arranged outside the feeding housing, and a packing seal box is provided between the propulsion roller shaft and the feeding housing.

[0018] By adopting the above technical solution, with the arrangement that the propulsion roller shaft is rotatably connected to the roller shaft support, it is possible to improve the smooth rotation of the combination of the conveying roller, the feeding screw and the discharge end cover, reduce the rotation resistance; the packing seal box can form reliable sealing between the propulsion roller shaft and the feeding housing, reducing the escape of the odor of kitchen waste in the screening housing.

[0019] In a specific feasible implementation, the driving screw is arranged as an annular screw structure, and the driving screw includes a propulsion part located on the outer side of the screw and a cutting part located on the inner side of the screw.

[0020] By adopting the above technical solution, by using the annular screw structure of the driving screw, it is possible to crush and propel the slurry material at a position adjacent to the screen, which is beneficial to improving the crushing effect of the slurry material and the filtration efficiency of the slurry material.

[0021] In a specific feasible implementation, a screen flange is provided inside the screening housing, and both ends of the screen are fixed to the screen flange.

[0022] By adopting the above technical solution, the use of the screen flange can facilitate the installation and fixation of the screen inside the screening housing and improve the stability of the screen.

[0023] In a specific feasible implementation, the screen includes a first half-screen and a second half-screen, and the first half-screen and the second half-screen are combined with each other to form the cylindrical screen. The screen is arranged on the outer side of the driving screw and is adjacent to the driving screw.

[0024] By adopting the above technical solution, by using the screen structure formed by the combination of the first half-screen and the second half-screen, it is beneficial to the installation and disassembly of the screen and facilitates the maintenance and servicing of the screen; by using the arrangement that the screen is arranged at a position adjacent to the outer side of the conduction screw, it can enable the slurry material to be propelled close to the inner side of the screen, which is beneficial to the liquid and fine materials in the slurry material to pass through the mesh holes of the screen and realize the separation between the liquid and fine materials and the coarse materials.

[0025] In a specific feasible implementation, a flushing mechanism is provided at the upper part of the screening housing. The flushing mechanism includes a flushing water pipe and a plurality of flushing nozzles. The flushing water pipe is arranged on the outer side of the upper part of the screening housing, and the flushing nozzles are arranged at positions corresponding to the flushing water pipe on the inner side of the screening housing and are connected to the flushing water pipe.

[0026] By adopting the above technical solution, by using the flushing mechanism provided at the upper part of the screening housing, the screen can be flushed, reducing the blockage of the screen mesh holes and reducing the workload of screen maintenance; by using a plurality of flushing nozzles, the flushing range of the screen and the impact force on the screen can be improved, enhancing the flushing effect of the screen; by using the arrangement that the flushing water pipe is arranged outside the screening housing and the flushing nozzles are arranged inside the screening housing, the pollution of the flushing mechanism itself can be reduced and the service life of the equipment can be increased.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By using the feeding device arranged at one end of the screening device, the slurry material formed by the pretreatment of food waste can be conveyed into the interior of the screen and the driving screw, avoiding the interference of the high-speed rotating driving screw on the slurry material when the slurry material enters from the side wall of the screen and the driving screw, and affecting the crushing and fine screening effects of the slurry material;

[0029] 2. By using the feeding pipe connection structure, the pipeline for conveying the slurry material can be connected to the feeding pipe connection structure to form a sealed connection between the feeding pipeline and the feeding device, reducing the escape of the odor of food waste in the slurry material;

[0030] 3. By using the fine material collection mechanism and the coarse material collection mechanism arranged at the lower part of the screening housing, the fine material and the material formed by the fine screening of the slurry material can be collected inside the screening housing, reducing the escape of the odor of food waste;

[0031] 4. By using the setting that both ends of the driving screw are respectively connected to the feeding screw and the discharge end cover, the driving screw can be rotated without relying on the rotating shaft, preventing the flexible impurities in the slurry material from winding around the rotating shaft and affecting the crushing and conveying of the slurry material, and improving the effects of crushing and fine screening the slurry material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present application.

[0033] Figure 2 It is an exploded view of the parts of an embodiment of the present application.

[0034] Figure 3 It is a top view of an embodiment of the present application.

[0035] Figure 4 It is Figure 3 The sectional view taken along the A-A direction in

[0036] Description of the reference numerals: 1. Feeding device; 11. Feeding housing; 12. Propelling roller; 121. Feeding screw; 122. Propelling roller shaft; 13. Feeding pipe connection structure; 14. Roller shaft support; 141. Roller shaft seat frame; 142. Roller shaft bearing; 2. Screening device; 21. Screening housing; 211. Fine material collection tank; 212. Coarse material collection tank; 213. Inspection door; 22. Driving screw; 221. Propelling part; 222. Cutting part; 23. Discharge end cover; 231. End cover plate; 232. End cover shaft; 24. Screen; 241. First half screen; 242. Second half screen; 25. Screen flange; 26. Flushing mechanism; 261. Flushing water pipe; 262. Flushing nozzle; 3. Driving motor; 31. Coupling; 32. Motor seat; 4. Fine material discharge pipe; 5. Screw conveyor; 6. Stuffing box seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not used to limit the present application.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In this specification, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features.

[0040] An embodiment of the food waste fine separation device of the present application is as Figure 1 and Figure 2 shown, and includes a feeding device 1, a screening device 2 and a driving motor 3. The slurry material formed after the pretreatment of food waste is transported into the feeding device 1, and is transported into the screening device 2 through the feeding device 1 for fine separation treatment. The driving motor 3 is used to provide the driving force for the screening device 2 and the feeding device 1 to work.

[0041] The feeding device 1 includes a feeding housing 11 and a propulsion roller 12. The feeding housing 11 is a closed cylindrical outer shell made of metal material, and a feeding pipe connection structure 13 is provided on the side wall of the feeding housing 11. Through the feeding pipe connection structure 13, a fixed connection with the pipeline for transporting the slurry material of the pretreated food waste can be formed, and the slurry material is transported into the interior of the feeding housing 11, so that the slurry material in the transmission process is isolated from the external environment, and the odor of food waste in the slurry material is prevented from escaping. The propulsion roller 12 is arranged along the axial direction of the feeding housing 11 inside the feeding housing 11, and a feeding screw 121 is provided on the outer side wall of the propulsion roller 12. When the propulsion roller 12 rotates, the feeding screw 121 can be used to transport the slurry material in the feeding housing 11.

[0042] The screening device 2 includes a screening housing 21, a transmission screw 22, a discharge end cover 23 and a screen 24. The screening housing 21 is arranged as a sealed housing of a suitable shape. Generally, the size of the screening housing 21 is much larger than that of the feed housing 11 to provide a relatively large fine screening space for food waste. An inspection window may also be provided on the screening housing 21. During operation, a fastener is used to cover and install an inspection door 213 on the inspection window to keep the screening housing 21 airtight. When maintenance and inspection of the facilities inside the screening housing 21 are required, the inspection door 213 can be removed to perform maintenance and inspection operations through the inspection window. The transmission screw 22, the discharge end cover 23 and the screen 24 are all arranged inside the screening housing 21 to further crush and finely screen the food waste pretreatment slurry material in a sealed environment, reducing the escape of food waste odor.

[0043] An inlet hole is provided at one end of the screening housing 21. The size of the inlet hole is larger than the cross-sectional size of the propulsion roller 12 and smaller than the cross-sectional size of the feed housing 11. The feed housing 11 is fixedly connected to the screening housing 21 around the inlet hole. The feed housing 11 and the screening housing 21 can be connected by welding to maintain the seal at the connection between the feed housing 11 and the screening housing 21, preventing the leakage of slurry material and the escape of odor. The transmission screw 22 is arranged at one end of the screening housing 21 adjacent to the inlet hole. Generally, the diameter of the transmission screw 22 is much larger than that of the feed screw 121. The end of the transmission screw 22 is bent inward and is welded to the feed screw 121 at a position adjacent to the inlet hole. When the transmission screw 22 rotates, it drives the feed screw 121 to rotate synchronously, so that the food waste pretreatment slurry material is pushed by the feed screw 121 through the inlet hole and enters the screening housing 21 from the inside of the transmission screw 22. The other end of the transmission screw 22 is connected to the discharge end cover 23 to be able to rotate synchronously with the discharge end cover 23. The high-speed rotating transmission screw 22 cuts and crushes the slurry material and pushes the slurry material to move towards the other end of the screening housing 21.

[0044] The screen 24 is arranged on the outer periphery of the driving screw 22 and is located at a partial position near one end of the feeding hole within the screening housing 21. A plurality of screen holes are evenly arranged on the screen 24, and the screen holes are preferably circular holes with a diameter of 5 mm. The crushed slurry material moves on the screen 24 towards the other end of the screening housing 21 under the push of the driving screw 22. The fine material and liquid components therein pass through the screen holes on the screen 24 and enter the outside of the screen 24, while the coarse material that cannot pass through the screen holes of the screen 24 continues to move towards the other end of the screen 24 under the push of the driving screw 22 until it crosses the edge of the screen 24 and falls from the other end of the screening housing 21. A fine material collection mechanism and a coarse material collection mechanism are arranged at the lower part of the screening housing 21. The fine material collection mechanism and the coarse material collection mechanism can be arranged at the lower position within the screening housing 21, or can be formed by the fractal structure of the lower part of the screening housing 21 into the fine material collection mechanism and the coarse material collection mechanism, or a part of the fine material collection mechanism and the coarse material collection mechanism. The fine material collection mechanism is arranged at the corresponding position below the screen 24 so that the liquid and fine material passing through the screen holes of the screen 24 can fall into the fine material collection mechanism; the coarse material collection mechanism is arranged at the remaining part of the lower part of the screening housing 21 so that the coarse material crossing the edge of the screen 24 can fall into the coarse material collection mechanism, thereby realizing the separation of the fine material and the coarse material.

[0045] The driving motor 3 is arranged at one end of the screening housing 21 opposite to the feeding device 1 outside the screening housing 21. A motor base 32 is arranged outside the screening housing 21, and the driving motor 3 is installed on the motor base 32. The driving motor 3 is drivingly connected to the discharge end cover 23 through the screening housing 21. Specifically, the output shaft of the driving motor 3 can pass through the screening housing 21 and be connected to the discharge end cover 23, or the discharge end cover 23 can pass through the screening housing 21 and be connected to the output shaft of the driving motor 3. When the driving motor 3 operates, it can drive the discharge end cover 23 to rotate and drive the driving screw 22 to rotate through the discharge end cover 23, forming crushing and pushing on the slurry material. The driving motor 3 can adopt a variable-frequency motor, and the driving motor 3 can drive the discharge end cover 23, the driving screw 22, and the feeding screw 121 to rotate at a speed of 1000 - 1440 r / min. Since the driving screw 22 rotates under the drive of the discharge end cover 23, it gets rid of the drive of the traditional rotating shaft, thus avoiding the flexible impurities in the slurry material from winding around the rotating shaft and reducing the crushing and propulsion effect of the driving screw 22 on the slurry material, which affects the fine separation effect of kitchen waste.

[0046] In some embodiments of the kitchen waste fine separation equipment of the present application, such as Figure 3 and Figure 4As shown, the fine material collection mechanism includes a fine material collection tank 211 and a fine material discharge pipe 4. The fine material collection tank 211 is formed by processing a part of the bottom plate of the screening housing 21, and is formed into a structure integrally connected to the screening housing 21. A fine material output hole is provided on one side of the fine material collection tank 211. The fine material discharge pipe 4 passes through the fine material output hole and enters the fine material collection tank 211. The periphery of the fine material discharge pipe 4 is hermetically connected to the fine material collection tank 211 around the fine material output hole, so that the fine material formed by the fine separation of food waste can be output and discharged through the fine material discharge pipe 4 in a sealed state. Since most of the fine materials formed by the fine separation of food waste are easily degradable organic material fragments, they can be directly discharged together with domestic wastewater, or can be used as organic fertilizers after simple treatment.

[0047] In a preferred embodiment of the food waste fine separation equipment of the present application, as Figure 3 and Figure 4 shown, the coarse material collection mechanism includes a coarse material collection tank 212 and a screw conveyor 5. The coarse material collection tank 212 is formed by processing a part of the bottom plate of the screening housing 21, and is formed into a structure integrally connected to the screening housing 21. A coarse material output hole is provided on the side wall of the coarse material collection tank 212. The screw conveying pipeline of the screw conveyor 5 passes through the coarse material output hole and enters the coarse material collection tank 212. The pipe wall of the screw conveying pipeline is hermetically connected to the coarse material collection tank 212 around the coarse material output hole, so that the coarse material formed by the fine separation of food waste can be output through the screw conveyor 5 in a sealed state. Since the coarse materials formed by the fine separation of food waste contain a variety of different large substances, they are easy to classify and sort, which is convenient for targeted classification treatment according to different categories, recycling the garbage with utilization value, and the garbage without utilization value can be directly landfilled.

[0048] In some embodiments of the food waste fine separation equipment of the present application, as Figure 2 and Figure 4 shown, the discharge end cover 23 includes an end cover plate 231 and an end cover shaft 232. The end cover plate 231 can use a circular metal plate. The end cover shaft 232 is fixed at the center of the side of the end cover plate 231 by welding. The driving screw 22 is welded to the other side of the end cover plate 231, so that the rotation axis of the driving screw 22 is coaxial with the end cover shaft 232. The end of the end cover shaft 232 passes through the shaft hole on the screening housing 21 and is connected to the driving motor 3. When the driving motor 3 works, it can drive the driving screw 22 to rotate smoothly through the discharge end cover 23, forming a cutting and pushing effect on the slurry material, which is beneficial to the crushing and fine separation of the slurry material. A packing seal box 6 is installed between the end cover shaft 232 and the screening housing 21 around the shaft hole to form a seal between the end cover shaft 232 and the screening housing 21.

[0049] In a preferred embodiment of the food waste fine separation equipment of the present application, as Figures 2 to 4As shown in the figure, a coupling 31 is connected between the drive motor 3 and the end cover shaft 232. One end of the coupling 31 is connected to the output shaft of the drive motor 3, and the other end is connected to the end cover shaft 232. The use of the coupling 31 can reduce the requirement for the coaxiality between the output shaft of the drive motor 3 and the end cover shaft 232, and reduce the transmission stress and transmission vibration noise.

[0050] In some embodiments of the kitchen waste fine separation equipment of the present application, such as Figures 2 to 4 As shown in the figure, a propulsion roller shaft 122 is provided at one end of the propulsion roller 12. The propulsion roller shaft 122 is coaxially connected to the central axis position of the propulsion roller 12. A roller shaft support 14 is provided outside the feed housing 11. Specifically, the roller shaft support 14 may include a roller shaft seat frame 141 and a roller shaft bearing 142. One end of the roller shaft seat frame 141 is fixed to the feed housing 11, and a bearing support platform is provided on the roller shaft seat frame 141; the roller shaft bearing 142 is installed on the bearing support platform, and the propulsion roller shaft 122 passes through the feed housing 11 and is installed in the roller shaft bearing 142. The roller shaft bearing 142 and the end cover shaft 232 together form the rotation axis of the rotating body composed of the propulsion roller 12, the transmission screw 22 and the discharge end cover 23, ensuring the synchronous and stable rotation of the propulsion roller 12, the transmission screw 22 and the discharge end cover 23. A packing seal box 6 is installed at a position close to the feed housing 11 on the propulsion roller shaft 122. The packing seal box 6 can form a reliable seal between the propulsion roller shaft 122 and the feed housing 11, preventing the escape of the slurry material and the odor emitted therefrom.

[0051] In some embodiments of the kitchen waste fine separation equipment of the present application, such as Figure 2 and Figure 4 As shown in the figure, the transmission screw 22 is a spiral metal ring made of metal material. The transmission screw 22 is set as a variable-thickness screw with an outer diameter of 650 mm. A propulsion part 221 with a constant thickness is provided on the outside of the transmission screw 22, and a blade-shaped structure with a gradually decreasing thickness from the outside to the inside is provided on the inside of the transmission screw 22, forming a cutting part 222 located on the inside of the screw. When the transmission screw 22 rotates at a high speed, the annular transmission screw 22 forms a driving force on the slurry material in the area where it is located, pushing the material to move inside the screen 24, improving the filtering effect of the screen 24 on the slurry material, and pushing the coarse material that cannot pass through the screen 24 out of the screen. At the same time, the variable-thickness structure of the cutting part 222 and the inner blade part can also generate a cutting effect on the slurry material at the inner edge part of the transmission screw 22, further crushing the substances in the slurry material, and crushing the materials mainly composed of organic substances in the kitchen waste into pulp, so as to improve the separation and utilization amount of organic matter and reduce the loss of available organic matter.

[0052] In some embodiments of the kitchen waste fine separation equipment of the present application, such as Figure 2 and Figure 4As shown in the figure, a screen flange 25 is provided inside the screening housing 21. There are two screen flanges 25. One screen flange 25 is fixed on the screening housing 21 around the feed hole, and the other screen flange 25 is installed at the junction of the fine material collection tank 211 and the coarse material collection tank 212 inside the screening housing 21. Both ends of the screen 24 are respectively fixed on the two screen flanges 25. The slurry material enters the interior of the screen 24 through the channel in the middle of the screen flange 25 at one end of the screen 24. The coarse material that cannot pass through the screen 24 is pushed out of the edge of the screen 24 through the channel in the middle of the screen flange 25 at the other end of the screen 24 and falls into the coarse material collection tank 212.

[0053] In a preferred embodiment of the food waste fine screening device of the present application, as Figure 2 shown, the screen 24 includes a first half screen 241 and a second half screen 242. The first half screen 241 and the second half screen 242 are generally both arranged in a semi-cylindrical shape. The first half screen 241 and the second half screen 242 can be combined with each other to form a cylindrical screen 24. The structure of the screen 24 formed by the combination of the first half screen 241 and the second half screen 242 facilitates the installation of the screen 24, can conveniently wrap the transmission screw 22 inside the screen 24, and also facilitates the disassembly of the screen 24, so that the maintenance, repair and replacement of the screen 24 can be carried out conveniently.

[0054] Both ends of the first half screen 241 and the second half screen 242 are provided with installation structures adapted to the screen flange 25. The first half screen 241 and the second half screen 242 are installed on the screen flange 25 through the installation structures to form a cylindrical screen 24 that encloses the outer peripheral surface of the transmission screw 22. The inner diameter of the screen 24 is slightly larger than the outer diameter of the transmission screw 22. The transmission screw 22 is arranged inside the screen 24, and the propulsion part 221 of the transmission screw 22 is close to the inner surface of the screen 24. The arrangement that the periphery of the transmission screw 22 is close to the inner surface of the screen 24 enables the propulsion part 221 to push the food waste slurry material to move along the inner surface of the screen 24, which is beneficial for the liquid and fine materials in the slurry material to pass through the mesh holes of the screen 24 and be collected in the fine material collection tank 211. In addition, the high-speed rotation of the transmission screw 22 can also drive the rotation of the slurry material inside the screen 24, generating a centrifugal effect, improving the transmittance of the liquid and fine materials in the slurry material, and also making the coarse materials that cannot be broken have a higher dryness, which is beneficial for the sorting and subsequent treatment of the coarse materials.

[0055] As a specific implementation manner of the food waste fine screening device of the present application, as Figures 1 to 4As shown in the figure, a flushing mechanism 26 is provided at the upper part of the screening housing 21. In a specific structure, the flushing mechanism 26 includes a flushing water pipe 261 and a plurality of flushing nozzles 262. The flushing water pipe 261 is arranged outside the screening housing 21 and is arranged along the length direction of the screen 24. The plurality of flushing nozzles 262 are arranged at positions inside the screening housing 21 corresponding to the flushing water pipe 261. The flushing nozzles 262 pass through the screening housing 21 and are connected to the flushing water pipe 261, and the nozzles face the direction of the screen 24.

[0056] The flushing water pipe 261 is connected to a pressure water source, such as a tap water pipe. Usually, a control valve is provided between the pressure water source and the flushing water pipe 261. When needed, the control valve is opened, and the water in the pressure water source is sprayed onto the screen 24 through the plurality of flushing nozzles 262 to flush the screen 24, prevent the blockage of the screen 24, and ensure the filtering effect of the screen 24. The control valve can be opened regularly under the control of an electric control device to form a regular flushing of the screen 24, thereby reducing the workload of manual maintenance of the screen 24.

[0057] Two flushing water pipes 261 can also be provided on the front and rear sides of the top of the screening housing 21, and two groups of flushing nozzles 262 are arranged at the corresponding positions inside the screening housing 21 to perform a wider range of flushing on different positions of the screen 24 and improve the cleaning effect of the screen 24.

[0058] In the description of the present application, the descriptions referring to terms such as "one embodiment", "preferred embodiment", "specific implementation manner", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0059] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fine separation device for kitchen waste, characterized in that: It includes a feeding device (1), a screening device (2) and a driving motor (3). The feeding device (1) includes a feeding housing (11) and a propulsion roller (12). The feeding housing (11) is fixed at one end of the screening device (2), and a feeding pipe connection structure (13) is provided on the side wall. The propulsion roller (12) is arranged inside the feeding housing (11), and a feeding screw (121) is arranged on the propulsion roller (12). The screening device (2) includes a screening housing (21), a transmission screw (22), a discharge end cover (23) and a screen (24). A feeding hole is provided at one end of the screening housing (21) adjacent to the feeding device (1). A fine material collection mechanism and a coarse material collection mechanism are provided at the lower part of the screening housing (21). The transmission screw (22) is arranged inside the screening housing (21). The feeding screw (121) passes through the feeding hole and is connected to one end of the transmission screw (22). The other end of the transmission screw (22) is connected to the discharge end cover (23). The screen (24) is arranged outside the transmission screw (22) and on the side where the fine material collection mechanism is located. The driving motor (3) is arranged outside the screening housing (21) and is drivingly connected to the discharge end cover (23). The driving motor (3) can drive the discharge end cover (23) to rotate and drive the transmission screw (22) to rotate through the discharge end cover (23). The transmission screw (22) is arranged as an annular screw structure. The transmission screw (22) includes a propulsion part (221) located on the outer side of the screw and a cutting part (222) located on the inner side of the screw. The thickness of the propulsion part (221) remains unchanged, and the thickness of the cutting part (222) gradually decreases from outside to inside.

2. The food waste fine separation device according to claim 1, characterized in that: The fine material collection mechanism includes a fine material collection tank (211) and a fine material discharge pipe (4). The fine material collection tank (211) is integrally connected to the screening housing (21), and a fine material output hole is provided on the fine material collection tank (211). The fine material discharge pipe (4) passes through the fine material output hole and is hermetically connected to the fine material collection tank (211).

3. The fine separation device for kitchen waste according to claim 2, characterized in that: The coarse material collection mechanism includes a coarse material collection tank (212) and a screw conveyor (5). The coarse material collection tank (212) is integrally connected to the screening housing (21), and a coarse material output hole is provided on the coarse material collection tank (212). The screw conveyor (5) passes through the coarse material output hole and is hermetically connected to the coarse material collection tank (212).

4. The food waste fine separation device according to claim 1, characterized in that: The discharge end cover (23) includes an end cover plate (231) and an end cover shaft (232). The end cover shaft (232) is fixed on one side of the end cover plate (231), and the transmission screw (22) is connected to the other side of the end cover plate (231). The end cover shaft (232) passes through the screening housing (21) and is connected to the driving motor (3). A packing seal box (6) is provided between the end cover shaft (232) and the screening housing (21).

5. The food waste fine separation device according to claim 4, characterized in that: The driving motor (3) is connected to the end cover shaft (232) through a coupling (31).

6. The food waste precise separation device according to claim 1, characterized in that: One end of the propulsion roller (12) is provided with a propulsion roller shaft (122). The propulsion roller shaft (122) passes through the feeding housing (11) and is rotatably connected to a roller shaft support (14) arranged outside the feeding housing (11). A packing seal box (6) is arranged between the propulsion roller shaft (122) and the feeding housing (11).

7. The food waste fine separation equipment according to any one of claims 1-6, characterized in that: A screen flange (25) is arranged inside the screening housing (21). Both ends of the screen (24) are fixed to the screen flange (25).

8. The food waste fine separation device according to claim 7, characterized in that: The screen (24) includes a first half screen (241) and a second half screen (242). The first half screen (241) and the second half screen (242) are combined with each other to form the cylindrical screen (24). The screen (24) is arranged outside the transmission screw (22) and is adjacent to the transmission screw (22).

9. The kitchen waste fine separation device according to claim 8, characterized in that: A flushing mechanism (26) is arranged at the upper part of the screening housing (21). The flushing mechanism (26) includes a flushing water pipe (261) and a plurality of flushing nozzles (262). The flushing water pipe (261) is arranged outside the upper part of the screening housing (21). The flushing nozzles (262) are arranged at positions inside the screening housing (21) corresponding to the flushing water pipe (261) and are connected to the flushing water pipe (261).

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