Kitchen waste treatment system and treatment method thereof

Abstract

The present invention discloses a kitchen waste treatment system and a treatment method thereof, which sequentially performs crushing, primary filtration, secondary filtration and filter pressing on kitchen waste, and finally performs oil-water separation, recovers oil pollution, and discharges filtered water, wherein solid waste is squeezed into dry waste in the secondary filtration, thereby realizing the basic discharge of the oil-water mixture in the waste mixture, and the remaining solid waste is squeezed and formed into cake-shaped dry waste, and then the dry waste is discharged separately from the secondary filtration device, thereby completing the dry-wet separation, and the discharged dry waste is of uniform specifications, and since the oil-water mixture is basically separated, the placement time of the dry waste is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen waste treatment equipment, and in particular to a kitchen waste treatment system and a treatment method thereof. Background Art

[0002] A food waste disposer is a device used to process kitchen waste, reducing the amount of waste sent to landfill by processing food scraps and organic waste within a home or commercial setting.

[0003] In the current food waste disposers, a common treatment method is to crush organic waste into fine particles through granulation processing technology to reduce its volume and facilitate subsequent processing. This method can accelerate the decomposition of garbage, reduce the subsequent garbage processing time, and is conducive to subsequent resource utilization. However, although food waste disposers have made certain progress in crushing technology, they still face some technical problems: food waste disposers usually need to deal with moist and perishable organic waste, and the equipment is susceptible to corrosion and wear during long-term operation. Therefore, the reliability and maintenance cost of the equipment is an important technical issue. In addition, food waste may contain impurities and pollutants, such as plastic bags, harmful chemicals, etc., which require more complete classification and purification processing technology to ensure that the treated products meet environmental protection standards.

[0004] A garbage disposal device in the prior art crushes and separates kitchen waste by passing it into a cavity with a screw. Although the kitchen waste can be effectively crushed by the rotation of the screw, it can only separate a portion of the oil-water mixture, and the discharged solid waste is still mixed with a lot of oil and sewage. In addition, the treated waste cannot be shaped, and the waste retained in the cavity is prone to stink. The discharged treated waste can only prevent the drain pipe from being blocked, and the treated waste is difficult to reuse. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a method for treating kitchen waste.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A method for treating kitchen waste, comprising the following steps:

[0007] Step A, garbage crushing, providing a crushing device, crushing the kitchen waste into a garbage mixture consisting of solid impurities and an oil-water mixture in the crushing device;

[0008] Step B, primary filtration, a primary filtration device is set up to receive the garbage mixture and separate part of the oil-water mixture by squeezing, and the rest of the garbage mixture continues to be discharged;

[0009] Step C, secondary filtration, setting a secondary filtration device, receiving the garbage mixture from the primary filtration device, separating the remaining oil-water mixture by extrusion, and shaping the solid impurities in the secondary filtration device, opening the secondary filtration device, and discharging and collecting the fixed impurities by extrusion;

[0010] Step D, filter pressing, setting a filter pressing device to receive the oil-water mixture from the primary filter device and the secondary filter device, and further separating the residual impurities in powder or granular form in the oil-water mixture by extrusion, and pressing and shaping the residual impurities;

[0011] Step E, oil-water separation, setting an oil-water separation chamber to receive the oil-water mixture and residual impurities from the filter press device, leaving the oil-water mixture to stand to separate the oil and water layers, and discharging the filtered water and collecting the filtered oil.

[0012] Furthermore, in step A, the pulverizing device is also connected to a drainage channel and a discharge channel, the garbage mixture is transported to the primary filtering device through the discharge channel, and an electromagnetic valve is arranged between the drainage channel and the discharge channel. When the pulverizing device is started, the electromagnetic valve closes the drainage channel, and when the pulverizing device is turned off, the electromagnetic valve opens the drainage channel.

[0013] Furthermore, in step B and step C, by arranging an extrusion component in the filter cavity of the primary filter device and the secondary filter device, and arranging an oil hole on the filter cavity, the extrusion component performs an extrusion action in the filter cavity, and filters out the oil-water mixture in the garbage mixture through the oil hole to be discharged to the filter press device, wherein the primary filter device is connected to the secondary filter device through a primary discharge pipe, and the secondary filter device discharges the shaped solid impurities through the impurity removal port, and the primary discharge pipe and the impurity removal port are both located at the ends of the extrusion component and the filter cavity.

[0014] Further, in step C, the filter chamber of the secondary filtration device is closed, and the solid impurities are squeezed and shaped at the end of the filter chamber by an extrusion component, and the oil-water mixture is discharged at the front end of the filter chamber. Then, the end of the filter chamber is opened, and a collection box is set at the end of the secondary filtration device. The shaped fixed impurities are discharged into the collection box with the help of the extrusion component, wherein the filter chamber matches the contour of the extrusion component, and the fixed impurities are squeezed and shaped into a corresponding shape.

[0015] Furthermore, in step B and step C, the oil holes limit the outer diameter of the residual impurities discharged into the filter press device, and a filter basket is arranged in the oil-water separation chamber. The filter basket is provided with multiple oil holes. After the residual impurities are squeezed by the filter press, the remaining powdery impurities are discharged through the oil holes along with the oil-water mixture and enter the oil-water separation chamber, and the large particles of residual impurities are retained in the filter basket.

[0016] Further, in step E, a heating component is provided in the oil-water separation chamber and is started when the oil-water mixture is stationary in the chamber to keep the oil-water mixture in a liquid state.

[0017] Further, in step E, a first partition and a second partition are sequentially arranged in the oil-water separation chamber, a first overflow groove is formed between the bottom of the first partition and the oil-water separation chamber, and a second overflow groove is formed between the second partition and the top of the oil-water separation chamber. The oil-water mixture passing through the filter press first passes through the filter basket, and sequentially passes through the first overflow groove and the second overflow groove, and a drain port and an oil collecting tank are connected at the end of the oil-water separation chamber, and a baffle is arranged on the drain port to prevent the oil-water mixture from directly entering the drain port.

[0018] Furthermore, in step B to step D, radially arranged protrusions are provided at the lower part of the extrusion component, and guide portions matching the protrusions are provided in the filter cavity, and the oil holes are provided directly below the protrusions.

[0019] The present invention also provides a kitchen waste treatment system, comprising:

[0020] A comminution device having a processing channel for the entry and discharge of kitchen waste;

[0021] The secondary filtering device comprises a debris removal chamber connected to the processing channel, a debris removal port provided at the end of the debris removal chamber, a stopper component and a collection chamber, wherein an extrusion component is further arranged in the debris removal chamber, wherein the stopper component has a filter pressing position for keeping the filter removal port closed, and a debris removal position for releasing the filter removal port, wherein the stopper component receives the extrusion component at the filter pressing position and shapes the garbage mixture between the stopper component and the extrusion component, and wherein the extrusion component separates part of the oil-water mixture by extruding the garbage mixture, and wherein the stopper component opens relative to the debris removal port at the debris removal position and discharges the shaped garbage mixture through the extrusion component;

[0022] The oil-water separation device includes multiple oil-water separation chambers, an overflow chamber arranged between the oil-water separation chambers, the front end oil-water separation chamber receives the oil-water mixture, the end oil-water separation chamber is also connected to the oil storage chamber and the drainage pipe, and a heating component is arranged at the bottom of the oil-water separation chamber.

[0023] Furthermore, a primary filtering device is arranged between the crushing device and the secondary filtering device, a filtering cavity is arranged in the primary filtering device, and the extrusion component is also arranged in the filtering cavity. Both the primary filtering device and the secondary filtering device are provided with an oil pipe for discharging the oil-water mixture.

[0024] It also includes a filter press device, which has a filter press cavity, in which an extrusion component is arranged, and the oil pipe is connected to the filter press device, and the filter press device is used to extrude and shape the garbage powder in the oil-water mixture.

[0025] The upper part of the impurity removal port is provided with a driving assembly for driving the stopper component to move between the impurity removal position and the filter pressing position, and the lower part of the impurity removal port is provided with a retaining assembly for locking or releasing the stopper component at the filter pressing position.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] The pulverizing device of the present invention first pulverizes kitchen waste to form a pulverized garbage mixture mixed with oil and water, which then enters a primary filtering device, and separates 70% to 80% of the oil-water mixture in the garbage mixture through an extrusion component in the primary filtering device and discharges it to a filter press device, while the remaining solid waste and residual oil-water mixture are sent to a secondary filtering device through an extrusion action, and then the secondary filtering device further extrude the garbage mixture therein to achieve the basic discharge of the oil-water mixture in the garbage mixture, and the remaining solid waste is extruded and formed into cake-shaped dry waste, and then the dry waste is discharged separately from the secondary filtering device to complete the dry-wet separation, and the discharged dry waste is of uniform specifications, and because the oil-water mixture is basically separated, the placement time of the dry waste is increased;

[0028] The oil-water mixture separated in the secondary filtration device also enters the filter press device, and then the filter press device further squeezes the residual powder garbage in the oil-water mixture to press the rod, ensuring the separation rate of the oil-water mixture from the garbage mixture, and finally enters the oil-water separation chamber for static stratification and overflow. The residual powder garbage is statically precipitated in the chamber, and the stratified oil is discharged into the oil storage chamber. The filtered water meets the oil-free discharge standard and is finally discharged into the drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the secondary filtering device of the present invention;

[0031] Figure 3 is a cross-sectional schematic diagram of a secondary filtering device of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the stopper component of the present invention being closed on the impurity removal port;

[0033] Figure 5 It is a schematic diagram of the structure of the extrusion component and the filter cavity of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the oil-water separation device of the present invention;

[0035] Figure 7 is a cross-sectional view of the oil-water separation device of the present invention;

[0036] Figure 8 is a cross-sectional view of the filtering device of the present invention;

[0037] Fig. 9 is a cross-sectional view of the filter press device of the present invention;

[0038] Fig.10 is a flow chart of the steps of the present invention;

[0039] In the figure:

[0040] 1. Crushing device;

[0041] 2. Secondary filtering device; 2.1. De-impurity chamber; 2.2. De-impurity port; 2.3. Stopper component; 2.31. Matching edge;

[0042] 3. Oil-water separation device; 3.1. First oil-water separation chamber; 3.2. Second oil-water separation chamber; 3.3. Box;

[0043] 3.4, first baffle; 3.5, second baffle; 3.6, first overflow trough; 3.7, second overflow trough; 3.8, overflow cavity; 3.9, filter basket; 3.91, filter hole;

[0044] 4. Oil storage chamber; 5. Drainage pipe; 6. Discharge pipe;

[0045] 7. Primary filtering device; 7.1. Filter chamber; 7.2. Primary discharge pipe;

[0046] 8. Filter press device; 8.1. Filter press chamber; 8.2. Three-stage oil pipe;

[0047] 9. Extrusion component; 9.1. Protrusion;

[0048] 10. First-level oil pipe; 11. Second-level oil pipe;

[0049] 12. Filter chamber; 12.1. Oil hole;

[0050] 13. Guide strip;

[0051] 14. Driving assembly; 14.1. Mounting seat; 14.2. First motor; 14.3. Rotating shaft; 14.4. First gear; 14.5. Second gear;

[0052] 15. Holding assembly; 15.1. Second motor; 15.2. First transmission wheel; 15.3. Second transmission wheel; 15.4. Locking arm;

[0053] 16. Collection box; 17. Oil baffle;

[0054] 18. Shell assembly; 18.1. First shell; 18.2. Second shell;

[0055] 19. Oil cylinder workbench; 20. Heating assembly; 20.1. First heating pipeline; 20.2. Second heating pipeline; 21. Three-way solenoid valve; 22. Cake-shaped dry garbage; DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0058] like Figure 1-10 As shown, a method for treating kitchen waste is provided, which is provided with a crushing device 1, a primary filtering device 7, a secondary filtering device 2 connected in series in sequence, and a filter pressing device 8 connecting the primary filtering device 7 and the secondary filtering device 2, and the bottom of the filter pressing device 8 is connected to an oil-water separation device 3, and further includes the following steps:

[0059] Step A, garbage crushing, providing a crushing device 1, discharging kitchen waste into the crushing device 1, and crushing the kitchen waste into a garbage mixture consisting of solid impurities and an oil-water mixture in the crushing device 1;

[0060] Step B, primary filtration, a primary filtration device 7 is set to receive the garbage mixture, and separate part of the oil-water mixture by squeezing, the separated oil-water mixture is discharged to the filter press device 8 alone, and the rest of the garbage mixture continues to be discharged to the secondary filtration device 2, and the garbage mixture discharged into the secondary filtration device 2 is separated from most of the oil-water mixture due to the squeezing effect of the primary filtration, wherein the squeezed garbage mixture is discharged into the secondary filtration device 2 at the end of the primary filtration device 7, and the oil-water mixture separated therefrom is discharged into the filter press device 8 at the lower part of the primary filtration device 7;

[0061] Step C, secondary filtration, a secondary filtration device 2 is provided to receive the garbage mixture from the primary filtration device 7, and further separate the remaining oil-water mixture by extrusion, wherein the solid impurities in the garbage mixture are shaped in the secondary filtration device 2 to form a cake-shaped dry garbage 22, and the cake-shaped dry garbage 22 is specifically shaped at the end of the secondary filtration device 2, and the oil-water mixture separated therefrom is discharged from the lower part of the secondary filtration device 2 into the filter press device 8, and then the secondary filtration device 2 is opened, and the fixed impurities are discharged and collected by extrusion;

[0062] Step D, filter pressing, setting a filter pressing device 8 to receive the oil-water mixture from the primary filter device 7 and the secondary filter device 2, and further separating the residual impurities in powder or granular form in the oil-water mixture by pressing, and pressing the residual impurities to dry and shape them, and the oil-water mixture is discharged into the oil-water separation chamber by the pressing action;

[0063] Step E, oil-water separation, setting an oil-water separation chamber to receive the oil-water mixture and residual impurities from the filter press 8, leaving the oil-water mixture to stand to separate the oil and water, and respectively discharging the filtered water and collecting the filtered oil. The filtered water is passed into the municipal groundwater through the drainage pipe 5, and the filtered oil is collected through the oil storage tank. At this point, the separation of solid waste, oil stains and filtered water in the kitchen waste is completed.

[0064] In step A, the pulverizing device 1 is also connected to a drainage channel and a discharge channel. The drainage pipe 5 is used for normal drainage by the user when the pulverizing device 1 is closed, and the garbage mixture is transported to the primary filter device 7 through the discharge channel. A solenoid valve is arranged between the drainage channel and the discharge channel. When the pulverizing device 1 is started, the solenoid valve closes the drainage channel, and when the pulverizing device 1 is closed, the solenoid valve opens the drainage channel.

[0065] Specifically, the solenoid valve refers to a three-way solenoid valve 21, which is connected to the discharge channel of the crushing device 1. One control end of the three-way solenoid valve 21 is connected to the primary filter device 7, and the other control end is connected to the drainage pipe 5. When the crushing device 1 is started, the three-way solenoid valve 21 closes the control end of the drainage pipe 5 to ensure that the garbage mixture enters the primary filter device 7, the secondary filter device 2 and the filter press device 8. When the crushing device 1 is closed, the three-way solenoid valve 21 opens the control end of the drainage channel and closes the control end of the discharge channel for normal use.

[0066] When there is no kitchen waste to be processed, the crushing device 1 can be opened and clean water can be introduced. The clean water can be passed through the primary filter device 7, the secondary filter device 2 and the filter press device 8 for self-cleaning. At this time, the connection of the oil storage chamber 4 is closed to discharge the residual fine garbage inside and reduce the back-odor.

[0067] An extrusion chamber for extruding and filtering the garbage mixture is provided in the primary filter device 7, the secondary filter device 2 and the filter press device 8, and a filter chamber 12 is provided below the extrusion chamber. The filter chamber 12 is used to receive the separated oil-water mixture. For the convenience of distinction, the filter chamber 12 of the primary filter device 7 is defined as the filter chamber 7.1, the filter chamber 12 of the secondary filter device 2 is defined as the impurity removal chamber 2.1, and the filter chamber 12 of the filter press device 8 is defined as the filter press chamber 8.1.

[0068] In step B and step C, by arranging an extrusion component 9 in the extrusion chambers of the primary filter device 7 and the secondary filter device 2, and arranging an oil hole 12.1 on the extrusion chamber, the extrusion component 9 performs an extrusion operation in the extrusion chamber, and filters out the oil-water mixture in the garbage mixture through the oil hole 12.1, enters the filter chamber 12, and is discharged to the filter press device 8.

[0069] The primary filter device 7 is connected to the secondary filter device 2 through the primary discharge pipe 7.2, and the secondary filter device 2 discharges the shaped dry solid impurities through the impurity removal port 2.2. The primary discharge pipe 7.2 and the impurity removal port 2.2 are both located at the ends of the extrusion component 9 and the extrusion cavity, and the end of the primary discharge pipe 7.2 is connected to the front of the extrusion component 9 in the impurity removal cavity 2.1, and the end of the discharge pipe 6 from the pulverizing device 1 is connected to the front of the extrusion component 9 in the filter cavity 7.1;

[0070] The primary filter device 7 is connected to the filter press device 8 through the primary oil pipe 10, and the secondary filter device 2 is connected to the filter press device 8 through the secondary oil pipe 11. The primary oil pipe 10 and the secondary oil pipe 11 are both arranged at the bottom of the extrusion component 9, the extrusion cavity, and the filter cavity 12 of the filter device where they are located, and the primary oil pipe 10 and the secondary oil pipe 11 intersect and are connected to the front of the extrusion component 9 in the filter pressure cavity 8.1.

[0071] In step B and step C, the extrusion component 9 implements the extrusion action in the extrusion cavity, and the extrusion cavity is preferably matched with the contour of the extrusion component 9 and the movement trajectory to ensure that the garbage mixture in the cavity can be fully squeezed, especially in the primary filtering device 7, to improve the separation efficiency of the oil-water mixture, and for the secondary filtering device 2, to effectively reduce the breakage of the solid garbage and improve the shaping effect of the solid garbage.

[0072] Specifically, in step C, the end of the extrusion chamber of the secondary filter device 2 is first closed, and only the garbage mixture from the primary filter device 7 is allowed to be discharged through the primary discharge pipe 7.2. Then, the solid impurities are squeezed and shaped at the end of the extrusion chamber by the extrusion component 9, and the oil-water mixture is discharged from the oil hole 12.1 at the bottom of the front end of the extrusion chamber, and enters the filter press device 8 through the filter chamber 7.1 and the secondary oil pipe 11. Then, the end of the extrusion chamber is opened, and a collection box 16 is set at the end of the secondary filter device 2. The shaped fixed impurities are discharged into the collection box 16 with the help of the extrusion component 9, wherein the extrusion chamber matches the contour of the extrusion component 9, and the fixed impurities are squeezed and shaped into a corresponding shape.

[0073] By squeezing and discharging the solid waste separately, the dryness of the solid waste is effectively guaranteed, which is convenient for subsequent collection and reuse, and improves energy utilization. The discharged cake-like dry waste 22 does not produce odor within a certain period of time, and the specifications of the cake-like dry waste 22 are uniform. A collection box 16 is set below the end of the secondary filtering device 2 to temporarily store the cake-like dry waste 22.

[0074] Specifically, in step B and step C, the oil hole 12.1 limits the outer diameter of the residual impurities discharged to the filter press device 8, and a filter basket 3.9 is arranged in the oil-water separation chamber. The filter basket 3.9 is provided with multiple oil holes 12.1. After the residual impurities are squeezed by the filter press, the remaining powdery impurities are discharged through the oil hole 12.1 and enter the oil-water separation chamber along with the oil-water mixture, and the large particles of residual impurities are retained in the filter basket 3.9. In this way, even if there is residual garbage in the garbage mixture after impurities are removed by the secondary filtering device 2, the residual garbage in the filter press device 8 is small particles or powder. These residual garbage can be discharged into the oil-water separation chamber for precipitation, and discharged along with the flushing of clean water in the self-cleaning stage.

[0075] As another implementation method of self-cleaning, a control valve may also be provided on the drain outlet of the oil-water separation chamber. During the self-cleaning process, the drain outlet is closed by the control valve, and the oil storage tank is opened to connect to the oil-water separation chamber, so that the flushed residual garbage and clean water are collected in the oil storage tank.

[0076] Of course, the oil storage tank can be separated from the oil-water separation chamber to reuse the oil inside it. During self-cleaning, the oil storage tank collects flushing water and residual garbage to prevent the residual garbage from being directly discharged into the municipal sewer and causing blockage.

[0077] In step C, in order to realize the automatic discharge of the cake-like dry garbage 22, an opening is formed at the end of the impurity removal chamber 2.1 to form an impurity removal port 2.2 for allowing the cake-like dry garbage 22 to pass through, and a movable stopper 2.3 is provided at the impurity removal port 2.2. The stopper 2.3 has a filter pressing position for keeping the impurity removal port 2.2 closed, and a impurity removal position for releasing the impurity removal port 2.2. When the pulverizing device 1 is in the working state, the stopper 2.3 is kept in the filter pressing position. At this time, the garbage mixture enters the impurity removal chamber 2.1, and part of the oil-water mixture is discharged through the holes in the impurity removal chamber 2.1. The extrusion component 9 is at the initial end of the stroke and is squeezed by The action of the component 9 squeezes the garbage mixture in the impurity removal chamber 2.1. Under the squeezing action, the garbage mixture is fully squeezed between the stop component 2.3 and the squeezing component 9, completing the separation of solid impurities and the oil-water mixture, and the oil-water mixture is discharged from the oil hole 12.1. Due to the separation and squeezing of the oil-water mixture, the solid impurities are formed into cake-like dry garbage 22 at the end of the impurity removal chamber 2.1. After the pulverizing device 1 stops working for a period of time, the stop component 2.3 is actuated and opened relative to the impurity removal port 2.2. Under the action of the squeezing component 9, the cake-like dry garbage 22 is pushed out of the impurity removal chamber 2.1, completing the separation of the oil-water mixture and the solid garbage.

[0078] from Figures 2 to 4 As shown in the figure, as an implementation method for switching the stop component 2.3 between the impurity removal position and the filter press position, a driving component 14 for driving the stop component 2.3 to move between the impurity removal position and the filter press position is provided at the upper portion of the impurity removal port 2.2, and a retaining component 15 for locking or releasing the stop component 2.3 in the filter press position is provided at the lower portion of the impurity removal port 2.2.

[0079] In this embodiment, the stop component 2.3 is configured to be opened by rotating at the upper part of the impurity removal port 2.2. Optionally, the stop component 2.3 can also be configured to be opened by rotating at other positions of the impurity removal port 2.2, or to be opened by translation with respect to the impurity removal port 2.2. The difference lies in the use of different drive components 14. For example, the stop component 2.3 can be opened by translation through a gear rack structure.

[0080] like Figure 3 As shown, specifically, the driving assembly 14 includes a mounting base 14.1 arranged on the impurity removal port 2.2, and a first motor 14.2 arranged on one side of the mounting base 14.1, a rotating shaft 14.3 is provided on the upper portion of the mounting base 14.1, and the stop member 2.3 is fixedly arranged on the rotating shaft 14.3, a first gear 14.4 is provided on the action end of the first motor 14.2, and a second gear 14.5 is provided on the rotating shaft 14.3, so that the opening or closing action of the stop member 2.3 is driven by the first motor 14.2 to realize the automatic discharge of the cake-like dry garbage 22.

[0081] The first gear 14.4 and the second gear 14.5 are preferably bevel gears to simplify the transmission system between the drive assembly 14 and the stop member 2.3, so that the first motor 14.2 can be vertically arranged on one side of the secondary filtering device 2 to reduce the space occupied by the drive assembly 14.

[0082] like Figure 4 As shown, specifically, the holding assembly 15 includes a second motor 15.1 arranged at the bottom of the impurity removal port 2.2, a first transmission wheel 15.2 arranged on the action end of the second motor 15.1, and a second transmission wheel 15.3 meshed on both sides of the first transmission wheel 15.2, and two locking arms 15.4 driven to rotate by the second transmission wheel 15.3. Through the action of the second motor 15.1, the two locking arms 15.4 are driven to engage with the stop member 2.3 to achieve locking, or to open relative to the stop member 2.3 to achieve unlocking. The holding assembly 15 effectively improves the stability of the stop member 2.3 in the filter pressing position to prevent the stop member 2.3 from being pushed open.

[0083] Preferably, the two locking arms 15.4 are hook-shaped plates, which are arranged in parallel at the bottom of the debris removal port 2.2. The lower end of the stop member 2.3 is extended with a mating edge 2.31, and the locking arms 15.4 are specifically engaged on the mating edge 2.31, thereby further reducing the space occupied by the retaining assembly 15.

[0084] The mounting seat 14.1 is L-shaped for the second motor 15.1 to be connected and fixed.

[0085] In step D, residual solid impurity powder still remains in the oil-water mixture after passing through the primary filter device 7 and the secondary filter device 2, and is discharged into the filter press device 8 together with the oil-water mixture, which is specifically connected to the primary oil pipe 10 and the secondary oil pipe 11, and the filter press device 8 has a filter press chamber 8.1, and an extrusion component 9 is arranged in the filter press chamber 8.1. The filter press device 8 is used to extrude and shape the garbage powder in the oil-water mixture. The bottom of the end of the filter press chamber 8.1 is connected to the tertiary oil pipe 8.2. As an option, the arrangement of the extrusion component 9 in the filter press chamber 8.1 is the same as that of the primary filter device 7 and the secondary filter device 2, and the cross-section of the filter press chamber 8.1 matches the cross-section of the extrusion component 9, which will not be described in detail here.

[0086] like Figure 1 and Fig. 9 As shown, a three-stage oil pipe 8.2 is provided at the bottom of the filter press chamber 8.1, and the three-stage oil pipe 8.2 is connected to the top of the oil-water separation chamber.

[0087] During operation, the filter press device 8 receives the oil-water mixture from the previous operation and squeezes the oil-water mixture through further actuation of the squeezing component 9, wherein the remaining powdery impurities are squeezed dry at the end of the filter press chamber 8.1, and the oil-water mixture enters the oil-water separation chamber.

[0088] As a method for treating residual powder impurities in the filter press device 8, a filter basket 3.9 is arranged in the oil-water separation chamber, and the residual impurities squeezed and dried are discharged into the oil-water separation chamber together with the oil-water mixture and first filtered through the filter basket 3.9, wherein the residual impurities with a larger outer diameter squeezed by the filter press device 8 are retained in the filter basket 3.9, and the residual impurities with a smaller outer diameter pass through the filter basket 3.9 and are precipitated in the oil-water separation chamber.

[0089] As another method for treating the residual powder impurities in the filter press device 8, a filter basket 3.9 is arranged in the oil-water separation chamber, and the residual impurities are kept in a squeezed state by the force-applying unit in the filter press chamber 8.1. At the same time, the oil-water mixture in the filter press chamber 8.1 is discharged into the oil-water separation chamber, and the squeezed residual impurities are released after the stratification and overflow in the oil-water separation chamber are completed, so that the residual impurities can be discharged from the drainage pipe 5 together with the clean water used in subsequent daily life, so as to improve the purity of the oil pollution in the oil storage chamber 4 for the reuse of the oil pollution.

[0090] Of course, since most of the solid impurities have been shaped and squeezed into cakes and then discharged in the previous secondary filtering device 2, only the residual impurities in powder form enter the filter press chamber 8.1 along with the oil-water mixture.

[0091] Optionally, the outer diameter of the filter holes 3.91 on the filter basket 3.9 can be controlled so that powdery fine residual impurities from the filter pressure chamber 8.1 are retained in the filter basket 3.9, or the outer diameter of the filter holes 3.91 on the filter basket 3.9 can be controlled to allow powdery residual garbage to pass through and be discharged together with the clean water in subsequent daily use or the filtered water and oil discharged after stratification, so as to avoid the blockage of the drainage pipe 5 caused by large particles of residual impurities.

[0092] Optionally, residual water may be reserved in the oil-water separation chamber so that the oil and water in the oil-water mixture can be quickly discharged from the overflow chamber 3.8.

[0093] It should be pointed out that according to the guidance of the present invention, it is conceivable that the actuating force of the primary filter device 7, the secondary filter device 2 and the filter press device 8 can also be provided by a motor. For example, in the present embodiment, the filter press device 8 can be set to be electrically started, so that it can work independently of the primary filter device 7 and the secondary filter device 2.

[0094] Based on the different actuating forces of the primary filter device 7, the secondary filter device 2 and the filter press device 8, what is the same is that they all use the linear extrusion action of the extrusion component 9 to fully extrude the garbage mixture at the end of the extrusion chamber, thereby separating the oil-water mixture. This is different from the screw crushing device in the prior art, which can crush the garbage mixture but cannot achieve good separation of the oil-water mixture. That is to say, in the garbage mixture that has been screw-crushed in the prior art, solid impurities are still mixed with the oil-water mixture.

[0095] In step B to step D, radially arranged protrusions 9.1 are provided at the lower part of the extrusion component 9, and guides matching the protrusions 9.1 are provided in the extrusion cavity, and the oil holes 12.1 are provided directly below the protrusions 9.1.

[0096] like Figure 5 As shown, as a further implementation of the extrusion component 9, the extrusion component 9 is specifically connected to the output end of the driving cylinder, and the driving cylinder can be the above-mentioned oil cylinder or electric cylinder. The force-applying end of the extrusion component 9 specifically includes a regular main body part, and convex parts 9.1 extending radially downward at the bottom of the main body part. The convex parts 9.1 are arranged at intervals to form a rough tooth shape. In the cavity where the extrusion component 9 is located, a guide bar 13 matching between two adjacent convex parts 9.1 is provided. The movement of the extrusion component 9 is guided by the guide bar 13, thereby improving the stability of the extrusion action and helping to reduce the gap between the extrusion component 9 and the inner wall of the cavity where it is located.

[0097] The extrusion action of the extrusion component 9 also plays a role in collecting solid waste, so that residual waste and solid waste can be collected in a direction between the guide bars 13, and through the extrusion action of the extrusion component 9, the protrusion 9.1 and the main part of the extrusion component 9 can fully squeeze the waste, thereby separating the oil-water mixture, while reducing the generation of powdery residual waste, and fully shaping and squeezing the solid waste in the secondary filtration device 2, and in the filter press device 8, the extrusion component 9 can better act on the powdery residual impurities through the protrusion 9.1, forcing the powdery residual impurities to accumulate and be shaped after extrusion.

[0098] The cavity where the extrusion component 9 is located refers to the impurity removal cavity 2.1 and the over-extrusion cavity, and may also include the pressure extrusion cavity.

[0099] Preferably, the oil holes 12.1 are directly below the protrusion 9.1 and are located on both sides of the guide bar 13, and the oil holes 12.1 are arranged in sequence and at intervals with respect to the movement trajectory of the extrusion component 9, and the movement trajectory of the guide bar 13 with respect to the extrusion component 9 extends to the end of the cavity where it is located.

[0100] Specifically, in step E, a first partition plate 3.4 and a second partition plate 3.5 are sequentially arranged in the oil-water separation chamber, a first overflow groove 3.6 is formed between the bottom of the first partition plate 3.4 and the oil-water separation chamber, and a second overflow groove 3.7 is formed between the second partition plate 3.5 and the top of the oil-water separation chamber. The oil-water mixture passing through the filter press device 8 first passes through the filter basket 3.9, and sequentially passes through the first overflow groove 3.6 and the second overflow groove 3.7, and a drain port and an oil collecting tank are connected at the end of the oil-water separation chamber, and a baffle is arranged on the drain port to prevent the oil-water mixture from directly entering the drain port.

[0101] In step E, a heating assembly 20 is provided in the oil-water separation chamber and is started when the oil-water mixture is stationary in the chamber to keep the oil-water mixture in a liquid state.

[0102] The present invention also provides a kitchen waste treatment system, comprising:

[0103] The pulverizing device 1 has a processing channel for the food waste to enter and be discharged. After entering the processing channel, the food waste is pulverized to form a waste mixture mixed with granular solid waste and an oil-water mixture. During the operation of the pulverizing device 1, domestic water is also discharged to improve the fluidity of the waste mixture.

[0104] The secondary filtering device 2 comprises a cleaning chamber 2.1 connected to the processing channel, a cleaning port 2.2 arranged at the end of the cleaning chamber 2.1, a stopper 2.3 and a collecting box 16. The cleaning chamber 2.1 is also provided with an extrusion component 9. The stopper 2.3 has a filter pressing position for keeping the cleaning port 2.2 closed and a cleaning position for releasing the cleaning port 2.2. When the pulverizing device 1 is in working state, the stopper 2.3 is kept in the filter pressing position. At this time, the garbage mixture enters the cleaning chamber 2.1, and part of the oil-water mixture is discharged through the holes in the cleaning chamber 2.1. The extrusion component 9 is at the initial end of the stroke, and the oil-water mixture is discharged through the holes in the cleaning chamber 2.1. The garbage mixture in the impurity removal chamber 2.1 is squeezed by the stopper 2.3 and the squeezing member 9. The solid impurities and the oil-water mixture are separated. The oil-water mixture is discharged from the impurity removal chamber 2.1. The solid impurities are formed into cake-like dry garbage 22 at the end of the impurity removal chamber 2.1 due to the separation and squeezing of the oil-water mixture. After the pulverizing device 1 stops working for a period of time, the stopper 2.3 is actuated and opens relative to the impurity removal port 2.2. The cake-like dry garbage 22 is pushed out of the impurity removal chamber 2.1 by the squeezing member 9. The separation of the oil-water mixture and the solid garbage is completed.

[0105] The oil-water separation device 3 includes a plurality of oil-water separation chambers, an overflow chamber 3.8 arranged between the oil-water separation chambers, the front end oil-water separation chamber receives the oil-water mixture, the rear end oil-water separation chamber is also connected to the oil storage chamber 4 and the drainage pipe 5, and a heating component 20 is arranged at the bottom of the oil-water separation chamber, wherein, after the above-mentioned impurity removal process, the solid impurities in the oil-water mixture are effectively reduced, and the oil-water mixture is statically stratified through the plurality of oil-water separation chambers, and the dirty oil is discharged from the top of the oil-water separation chamber to the oil storage chamber 4, and the filtered water meets the discharge standard after the dirty oil and solid impurities are separated, and then is directly discharged from the drainage pipe 5.

[0106] In order to improve the separation rate of the liquid oil-water mixture in the garbage mixture, a primary filtering device 7 is further arranged between the pulverizing device 1 and the secondary filtering device 2. A filtering chamber 7.1 is arranged in the primary filtering device 7. An extruding component 9 is also arranged in the filtering chamber 7.1. The bottom of the filter chamber 12 of the primary filtering device 7 is connected to a primary oil pipe 10. The bottom of the filter chamber 12 of the secondary filtering device 2 is connected to a secondary oil pipe 11. The primary oil pipe 10 and the secondary oil pipe 11 mainly discharge the oil-water mixture after being squeezed and separated by the squeezing component 9.

[0107] In order to improve the separation rate of the liquid oil-water mixture in the garbage mixture, a filter press device 8 is also provided. A filter press chamber 8.1 is provided in the filter press device 8. An extrusion component 9 is also arranged in the filter press chamber 8.1. The primary oil pipe 10 and the secondary oil pipe 11 are connected to the front of the extrusion component 9 in the filter press device 8. The filter press device 8 is used to extrude and shape the residual garbage powder in the oil-water mixture. The bottom of the end of the filter press chamber 8.1 is connected to the tertiary oil pipe 8.2. The tertiary oil pipe 8.2 is connected to the top of the oil-water separation chamber. The arrangement of the extrusion component 9 in the filter press chamber 8.1 is the same as that of the extrusion component 9 of the primary filter device 7 and the secondary filter device 2, and the cross-section of the filter press chamber 8.1 matches the cross-section of the extrusion component 9, which will not be described in detail here.

[0108] In this embodiment, the garbage mixture first enters the filter chamber 7.1 through the discharge pipe 6, and the oil-water mixture in the garbage mixture is preliminarily separated by the squeezing action of the squeezing component 9 in the filter chamber 7.1. As an example, the squeezing action of the primary filter device 7 separates 70% to 80% of the oil-water mixture. The garbage mixture after the initial filtration is brought out from the end of the filter chamber 7.1 to the primary discharge pipe 7.2 by the squeezing component 9, and enters the impurity removal chamber 2.1, thereby reducing the proportion of the oil-water mixture in the impurity removal chamber 2.1, achieving double squeezing of the garbage mixture, and further The humidity of the cake-like dry garbage 22 is reduced to reduce the odor of the cake-like dry garbage 22 discharged from the impurity removal chamber 2.1. The oil-water mixture separated by extrusion is then further extruded in the filter press device 8 to extrude, separate and shape the powdered and granular residual garbage. The filter press device 8 further discharges the oil-water mixture and the above-mentioned residual garbage into the oil-water separation chamber by extrusion. The oil-water mixture is stratified in the oil-water separation chamber, and the residual impurities are precipitated in the oil-water separation chamber, which can be discharged through subsequent self-cleaning flushing. The upper layer of oil is discharged into the oil storage tank, and the filtered water of the lower layer is discharged into the drainage pipe 5.

[0109] Through the above improvements, the cake-like dry garbage 22 discharged after the secondary squeezing, filtering and separating action of the primary filtering device 7 and the secondary filtering device 2 is collected outside the impurity removal chamber 2.1 to increase the retention time of the cake-like dry garbage 22. In a household environment, the cake-like dry garbage 22 can be cleaned after processing and collecting a day's kitchen waste. There is no need to clean the collection box 16 of the cake-like dry garbage 22 multiple times, and convenience is provided for the processing and classification of kitchen waste. The filtered water passing through the oil-water separation chamber meets the requirements of municipal discharge water, and the oil pollution passing through the oil-water separation chamber is collected for subsequent secondary utilization, thereby improving energy utilization.

[0110] like Figure 3 and Figure 8 As shown, as an embodiment of the primary filter device 7 and the secondary filter device 2, the primary filter device 7 and the secondary filter device 2 both include a shell assembly 18, an extrusion component 9 is arranged in the shell assembly 18 for linear movement, and the filter chamber 7.1 matches the movement trajectory of the impurity removal chamber 2.1 and the extrusion component 9, the impurity removal chamber 2.1 and the impurity removal port 2.2 are in the same direction as the movement trajectory of the extrusion component 9, and the filter chamber 7.1 and the extrusion component 9 therein, and the impurity removal chamber 2.1 and the extrusion component 9 therein match the contours. This arrangement ensures that the action of the extrusion component 9 fully extrudes the garbage mixture, improves the separation effect of the oil-water mixture, and the extrusion shaping effect on the solid impurities. On the other hand, the action of the extrusion component 9 can also ensure that there is no solid debris residue in the filter chamber 7.1 or the impurity removal chamber 2.1, avoiding the anti-odor phenomenon caused by garbage retention in the chamber.

[0111] from Figure 1It can be seen that, specifically, the extrusion components 9 of the primary filter device 7 and the secondary filter device 2 provide extrusion driving force through hydraulic pressure. For this purpose, a cylinder workbench 19 is provided to supply pressure to the primary filter device 7 and the secondary filter device 2. By selecting the oil pressure actuation method to provide a smooth output force and speed control for the action of the extrusion component 9, the movement process can be accurately controlled, which is beneficial to improving the extrusion efficiency. It has high reliability, few parts, and a long service life. It can adapt to various harsh environments and high-load working conditions. When subjected to load changes, the output force of the hydraulic cylinder remains basically stable, and can maintain stable operation under changing loads.

[0112] Of course, multiple primary filtering devices 7 may also be provided to gradually improve the separation effect of the oil-water mixture, and the pressure is supplied by the cylinder workbench 19 .

[0113] like Figure 5 and Figures 8 to 9 As shown, the shell assembly 18 includes a first shell 18.1 arranged on the periphery of the force-applying unit to form the above-mentioned impurity removal chamber 2.1, filter chamber 7.1, and filter press chamber 8.1. For the impurity removal chamber 2.1 and the filter chamber 7.1, it also includes a second shell 18.2. The second shell 18.2 is covered outside the first shell 18.1 and forms a filter chamber 12 with the first shell 18.1. An oil hole 12.1 is provided on the upper part of the filter chamber 12. The oil hole 12.1 is arranged on the movement trajectory of the extrusion component 9. The oil hole 12.1 is specifically arranged at the bottom of the first shell 18.1, so that after the force-applying unit is actuated, the separated oil-water mixture is discharged through the oil hole 12.1 and finally enters the oil-water separation device 3.

[0114] Optionally, a second shell 18.2 and an oil hole 12.1 on the first shell 18.1 may be provided outside the filter press chamber 8.1, and the oil hole 12.1 at the filter press chamber 8.1 has a smaller aperture to prevent powdery residual garbage from being directly discharged.

[0115] like Figure 6 and Figure 7 As shown, as a further embodiment of the oil-water separation device 3, the oil-water separation device 3 includes a box body 3.3, and a first partition plate 3.4 and a second partition plate 3.5 arranged in sequence in the box body 3.3, a first overflow groove 3.6 is provided at the bottom of the first partition plate 3.4, a second overflow groove 3.7 is provided at the top of the second partition plate 3.5, an overflow chamber 3.8 is separated from the first partition plate 3.4 and the second partition plate 3.5, and the first partition plate 3.4 and the second partition plate 3.5 are separated from the box body 3.3 to form a first oil-water separation chamber 3.1 and a second oil-water separation chamber 3.2 respectively.

[0116] Specifically, the first oil-water separation chamber 3.1 is connected to the first overflow groove 3.6, the second overflow groove 3.7 and the second oil-water separation chamber 3.2 in sequence.

[0117] Specifically, the drainage pipe 5 and the oil storage chamber 4 form a drainage port and an oil discharge port in the box body 3.3.

[0118] The first oil-water separation chamber 3.1 is arranged on the side of the first baffle 3.4 away from the second baffle 3.5, and is used for the oil-water mixture to enter. A filter basket 3.9 is arranged in the first oil-water separation chamber 3.1, and oil holes 12.1 are arranged on the filter basket 3.9 to further block and filter large particles of residual impurities in the oil-water mixture. The oil-water mixture is precipitated in the first oil-water separation chamber 3.1 and enters the overflow chamber 3.8 through the first overflow groove 3.6, and then enters the second oil-water separation chamber 3.2 through the upper second overflow groove 3.7, and the layered oil dirt on the upper part of the second oil-water separation chamber 3.2 is discharged into the oil storage chamber 4, and the filtered water on the lower part enters the drainage pipe 5.

[0119] The height of the oil drain port is higher than that of the water drain port, which can separate oil and water more effectively, because oil usually has a lighter density, while water has a larger density, and the oil floating on the water surface can be guided to the oil drain port,

[0120] Specifically, an oil baffle plate 17 is provided on the drain outlet. The oil baffle plate 17 is spaced from the drain outlet and forms a through opening below the drain outlet, which can prevent oil from flowing out of the drain outlet too early.

[0121] The heating component 20 includes a first heating pipe 20.1 and a second heating pipe 20.2. The first heating pipe 20.1 is arranged at the bottom of the first oil-water separation chamber, and the second heating pipe 20.2 is arranged at the bottom of the second oil-water separation chamber 3.2. The oil-water mixture will pass through these two heating pipes. If the ambient temperature is low, the oil may affect its fluidity due to solidification. The heating component 20 can provide heat to the oil and water to ensure that the oil remains in a liquid state during the separation process.

[0122] Specifically, the box body 3.3 is connected to an oil storage tank, the oil storage chamber 4 is formed in the oil storage tank, a control valve is provided between the oil storage tank and the second oil-water separation chamber 3.2, and a collection box 16 is provided below the impurity removal port 2.2.

[0123] It is worth mentioning that the collecting box 16 and the oil storage tank are both independently detachable.

[0124] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A method for treating kitchen waste, characterized in that: A kitchen waste treatment system is provided, wherein the kitchen waste treatment system comprises: A comminution device (1) having a processing channel for allowing food waste to enter and exit; A secondary filtering device (2) comprises a debris removal chamber (2.1) connected to a processing channel, a debris removal port (2.2) and a stopper component (2.3) arranged at the end of the debris removal chamber (2.1), and a collection chamber arranged below the debris removal port (2.2); an extrusion component (9) is also arranged in the debris removal chamber (2.1); a driving component (14) is arranged at the upper part of the debris removal port (2.2) for driving the stopper component (2.3) to close or open the debris removal port (2.2); a retaining component (15) is arranged at the lower part of the debris removal port (2.2) for locking or releasing the stopper component (2.3) when closing the debris removal port (2.2); solid impurities in a garbage mixture are shaped between the stopper component (2.3) and the extrusion component (9); an oil-water mixture in the garbage mixture is extruded and separated; the stopper component (2.3) discharges the solid impurities by opening the driving component (14) and releasing the retaining component (15); A primary filter device (7) is also arranged between the pulverizing device (1) and the secondary filter device (2); a filter chamber (7.1) is arranged in the primary filter device (7); an extrusion component (9) is also arranged in the filter chamber (7.1); the bottom of the filter chamber (12) of the primary filter device (7) is connected to a primary oil pipe (10); and the bottom of the filter chamber (12) of the secondary filter device (2) is connected to a secondary oil pipe (11); A filter press device (8) is also provided, wherein a filter press chamber (8.1) is provided in the filter press device (8), an extrusion component (9) is also arranged in the filter press chamber (8.1), a primary oil passing pipe (10) and a secondary oil passing pipe (11) are connected to the front of the extrusion component (9) in the filter press device (8), the filter press device (8) is used to extrude and shape the residual garbage powder in the oil-water mixture, the bottom of the end of the filter press chamber (8.1) is connected to a tertiary oil passing pipe (8.2), and the tertiary oil passing pipe (8.2) is connected to the top of the oil-water separation chamber; The extrusion component (9) is arranged in the housing assembly (18) to move linearly, and the movement tracks of the filter chamber (7.1), the impurity removal chamber (2.1) and the extrusion component (9) match, the impurity removal chamber (2.1) and the impurity removal port (2.2) are in the same direction as the movement track of the extrusion component (9), and the filter chamber (7.1) and the extrusion component (9) therein, as well as the impurity removal chamber (2.1) and the extrusion component (9) therein match in profile; The oil-water separation device (3) comprises an oil-water separation chamber for receiving the oil-water mixture, the oil-water separation chamber is also connected to an oil storage chamber (4) and a drainage pipe (5), and a heating component (20) is arranged at the bottom of the oil-water separation chamber; The following steps are also included: Step A, garbage crushing, providing a crushing device (1), crushing the kitchen waste into a garbage mixture consisting of solid impurities and an oil-water mixture in the crushing device (1); Step B, primary filtration, a primary filtration device (7) is provided to receive the garbage mixture and separate part of the oil-water mixture by squeezing, while the rest of the garbage mixture continues to be discharged; Step C, secondary filtration, setting a secondary filtration device (2), receiving the garbage mixture from the primary filtration device (7), separating the remaining oil-water mixture by extrusion, and shaping the solid impurities in the secondary filtration device (2), opening the secondary filtration device (2), and discharging and collecting the fixed impurities by extrusion; Step D, filter pressing, setting a filter pressing device (8) to receive the oil-water mixture from the primary filter device (7) and the secondary filter device (2), and further separating the residual impurities in powder or granular form in the oil-water mixture by extrusion, and pressing the residual impurities to dry and shape them; Step E, oil-water separation, setting an oil-water separation chamber to receive the oil-water mixture and residual impurities from the filter press device (8), leaving the oil-water mixture to stand to separate the oil and water layers, and discharging the filtered water and collecting the filtered oil.

2. A method for treating kitchen waste according to claim 1, characterized in that: In step A, the pulverizing device (1) is also connected to a drainage channel and a discharge channel, and the garbage mixture is transported to the primary filtering device (7) through the discharge channel. A solenoid valve is arranged between the drainage channel and the discharge channel. When the pulverizing device (1) is started, the solenoid valve closes the drainage channel, and when the pulverizing device (1) is closed, the solenoid valve opens the drainage channel.

3. A method for treating kitchen waste according to claim 1, characterized in that: In step B and step C, a squeezing component (9) is arranged in the filter cavity (12) of the primary filter device (7) and the secondary filter device (2), and an oil hole (12.1) is arranged on the filter cavity (12). The squeezing component (9) performs squeezing in the filter cavity (12) and filters out the oil-water mixture in the garbage mixture through the oil hole (12.1) to be discharged to the filter press device (8), wherein the primary filter device (7) is connected to the secondary filter device (2) through a primary discharge pipe (7.2), and the secondary filter device (2) discharges the solid impurities after being shaped through the secondary discharge pipe, and the primary discharge pipe (7.2) and the secondary discharge pipe are both located at the ends of the squeezing component (9) and the filter cavity (12).

4. A method for treating kitchen waste according to claim 1, characterized in that: In step C, the filter chamber (12) of the secondary filtering device (2) is closed, and the solid impurities are squeezed and shaped at the end of the filter chamber (12) by means of an extrusion component (9), and the oil-water mixture is discharged at the front end of the filter chamber (12). Then, the end of the filter chamber (12) is opened, and a collection box (16) is provided at the end of the secondary filtering device (2). The shaped fixed impurities are discharged into the collection box (16) by means of the extrusion component (9), wherein the filter chamber (12) matches the contour of the extrusion component (9), and the fixed impurities are squeezed and shaped into a corresponding shape.

5. A method for treating kitchen waste according to claim 3, characterized in that: In step B and step C, the oil hole (12.1) limits the outer diameter of the residual impurities discharged to the filter press device (8), and a filter basket (3.9) is arranged in the oil-water separation chamber. The filter basket (3.9) is provided with a plurality of filter holes (3.91). After the residual impurities are squeezed by the filter press, the remaining powdery impurities are discharged through the filter holes (3.91) along with the oil-water mixture and enter the oil-water separation chamber, and the large particles of residual impurities are retained in the filter basket (3.9).

6. A method for treating kitchen waste according to claim 1, characterized in that: In step E, a heating component (20) is arranged in the oil-water separation chamber and is started when the oil-water mixture is stationary in the chamber to keep the oil-water mixture in a liquid state. The heating component includes a first heating pipe and a second heating pipe. The first heating pipe is arranged at the bottom of the first oil-water separation chamber, and the second heating pipe is arranged at the bottom of the second oil-water separation chamber.

7. A method for treating kitchen waste according to claim 1, characterized in that: In step E, a first baffle (3.4) and a second baffle (3.5) are sequentially arranged in the oil-water separation chamber, a first overflow groove (3.6) is formed between the bottom of the first baffle (3.4) and the oil-water separation chamber, and a second overflow groove (3.7) is formed between the second baffle (3.5) and the top of the oil-water separation chamber. The oil-water mixture passing through the filter press device (8) first passes through the filter basket (3.9), and sequentially passes through the first overflow groove (3.6) and the second overflow groove (3.7), and a drain port and an oil collecting tank are connected at the end of the oil-water separation chamber, and a baffle is arranged on the drain port to prevent the oil-water mixture from directly entering the drain port.

8. A method for treating kitchen waste according to claim 1, characterized in that: In steps B to D, radially arranged protrusions (9.1) are provided at the bottom of the extrusion component (9), and guides matching the protrusions (9.1) are provided in the filter cavity (12), and the oil holes (12.1) are provided directly below the protrusions (9.1).

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