Closed type grading filter discharge bin for recovering kitchen waste oil

Abstract

The application discloses a closed type grading filter discharge bin for recovering kitchen waste oil, and particularly relates to the technical field of recovering kitchen waste oil, and comprises a bin body with an inlet and outlet and a hot flow device. The first heating assembly and the second heating assembly are arranged to form the hot flow device, the first heating assembly is matched with the baffle element thereon, the heat carried by the steam can be fully transmitted to the bin chamber, the oil material in the bin chamber is uniformly heated in the whole region, the oil in the bin chamber is rapidly and uniformly heated, the second heating assembly is matched with the material disturbing element thereon, the oil-containing residue falling into the conical bin can be fully heated, the heat transmission efficiency is strengthened, and the upper oil and the lower residue in the discharge bin can be heated in the whole region gradiently under the cooperation of the first heating assembly and the second heating assembly. While the oil flowability is ensured, the material is prevented from being hardened, and problems such as filter hole blockage, poor discharging and difficult residue discharging caused by low-temperature solidification of the material are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of kitchen waste oil recycling technology, and in particular to a closed-type graded filtration and unloading bin for kitchen waste oil recycling. Background Technology

[0002] Waste cooking oil is a collective term for waste edible oil, oily kitchen waste, and oily wastewater separated from food service, food processing and production activities. It is both a renewable raw material with resource utilization value and an organic waste that is easily perishable, smelly, and pollutes the environment. Therefore, it is necessary to achieve its harmless disposal and resource utilization through standardized recycling and treatment processes.

[0003] Currently, waste cooking oil contains solid impurities of various particle sizes, such as bones, plastic packaging, vegetable leaves, rice grains, and fine sand. To ensure the quality of feed materials for subsequent oil purification and processing, it is often necessary to perform graded filtration during the recycling process to gradually trap impurities of different particle sizes and separate oil from residue. Existing filtration and unloading equipment often adopts a bin structure with built-in multi-layer filter plates, relying on gravity sedimentation and step-by-step filtration to achieve solid-liquid separation, and then discharge clean oil and filter residue separately. However, because waste cooking oil contains a large amount of saturated fatty acid components, the viscosity of the oil will increase sharply at low temperatures, and may even solidify, resulting in a significant decrease in fluidity. At the same time, the oily residue deposited at the bottom of the bin is prone to compaction and caking due to low temperatures. This can easily cause blockage of filter plate pores and a decrease in filtration flux. It can also cause problems such as poor discharge from the bin and blockage of the bottom slag outlet, which seriously affect the continuous and stable operation of graded filtration and unloading, and greatly increase the frequency of equipment cleaning and maintenance and operating costs.

[0004] Therefore, this application proposes a closed-type graded filtration and unloading bin for recycling kitchen waste oil. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a closed-type graded filtration and unloading bin for the recycling of kitchen waste oil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A closed-type graded filtration and unloading bin for recycling kitchen waste oil includes a bin body with inlet and outlet and a heat flow device. The silo body is vertically equipped with at least one filter baffle, which divides the silo body into multiple interconnected chambers. Each chamber has a conical chamber with a slag discharge port at its bottom, and the upper part of the first chamber is detachably equipped with a filter frame that communicates with the silo body's feed inlet. The heat flow device includes a steam pipeline, a first heating component, and a second heating component. The steam pipeline is connected to the steam of the first heating component and the second heating component respectively. The first heating component is located outside each chamber and has several baffles inside. The baffles are configured to guide the steam flow and accelerate the heat transfer to the grease layer. The second heating component is located between each conical chamber and has several sets of material agitators on it. The material agitators are configured to accelerate the heat transfer to the residue layer and agitate the flow of the residue material.

[0007] As a further embodiment of the present invention, the first heating component includes an annular cavity, which is opened between the inner and outer sides of the chamber. A plurality of the flow deflectors are obliquely arranged at both ends of the annular cavity, and adjacent two flow deflectors are staggered vertically to form a bent steam flow path. The flow deflectors extend into the interior of the chamber. The second heating component includes a heating tube that extends laterally through the bottom of the conical chamber. Multiple sets of the material-scraping components are fixed to the outer wall of the heating tube and located inside the conical chamber. The section of the heating tube located outside the conical chamber is provided with an insulation sleeve. The steam pipeline includes two sets of steam supply mains for steam inlet and steam return, respectively, to form a steam circulation loop. The heating pipe is located between the two sets of steam supply mains, and branch pipes are provided between the two sets of steam supply mains and the chamber body. The branch pipes are connected to the annular clamp cavity.

[0008] As a further embodiment of the present invention, the two ends of the heating tube are respectively connected to the ends of two sets of steam supply main pipes by rotary joints, and the heating tube and the side wall of each conical chamber are sealed and rotated by sealed bearings. An adjustment unit is provided at one end of the heating tube outside the conical chamber, and the adjustment unit is used to drive the heating tube to swing back and forth.

[0009] As a further aspect of the present invention, the adjustment unit includes: Two fixing rings are symmetrically arranged on the outer wall of the heating tube, and telescopic rods are symmetrically arranged at the bottom ends of the two fixing rings. A support rod is connected between the bottom ends of the two telescopic rods, and a sliding sleeve is slidably sleeved on the outer wall of the support rod. A drive motor has a handle connected to its output end. A connecting rod is provided at the end of the handle, and the top end of the connecting rod is movably connected to a sliding sleeve through a bearing.

[0010] As a further aspect of the present invention, a plurality of blocks facing the material disturbance component are provided on the inner bottom side of the conical chamber. The blocks are configured to collide with the material disturbance component and cause the conical chamber to vibrate when the material disturbance component moves.

[0011] As a further embodiment of the present invention, the inlet of the silo is provided with an inlet pipe and the outlet is provided with an outlet pipe, the slag outlet of the conical silo is provided with a slag discharge pipe, and the ends of the slag discharge pipe, the inlet pipe and the outlet pipe are all provided with flange quick-connect joints.

[0012] As a further embodiment of the present invention, a maintenance opening is provided at the top of the hopper, a fixing plate is fixedly provided at the top center of the maintenance opening, and push-pull plates are movably provided at both ends of the top.

[0013] As a further embodiment of the present invention, the fixed plate is provided with an exhaust port communicating with the chamber, and a secondary recycling unit is provided at the exhaust port.

[0014] As a further aspect of the present invention, the secondary recycling unit includes: The separator is fixedly connected to the top of the fixed plate by a bracket, and its air inlet is connected to an exhaust pipe, and its air outlet is connected to a fan. One end of the exhaust pipe is connected to the exhaust outlet. A collection cylinder, the top of which is connected to the bottom of the separator, and the bottom of which is connected to the chamber through a pipe, the pipe being equipped with a solenoid valve; The purification box is fixedly connected to the top of the fixed plate by a frame, and its top end is connected to the air outlet of the fan. The bottom end of the purification box is connected to an air outlet pipe, and the interior of the purification box is provided with at least one set of packing layers.

[0015] The technical effects and advantages provided by the present invention in the above technical solution are as follows: This invention constructs a heat flow device by setting up a first heating component and a second heating component. The two heating components can supply steam simultaneously. The first heating component, in conjunction with its baffle, can fully transfer the heat carried by the steam to the chamber, forming uniform heating of the oil and grease materials in the chamber, and achieving rapid and uniform temperature rise of the oil and grease in the chamber. At the same time, the second heating component, in conjunction with its baffle, can fully heat the oily residue falling into the conical chamber, enhancing the heat transfer efficiency. With their synergistic cooperation, it can achieve full-area gradient heating of the upper layer of oil and the lower layer of residue in the unloading chamber. While ensuring the fluidity of the oil, it can prevent the material from caking and effectively prevent problems such as filter pore blockage, poor discharge, and difficulty in slag discharge caused by low-temperature solidification of the material. This greatly ensures the continuous and stable operation of the graded filtration and unloading operation. Steam is introduced into the heating pipe, and the reciprocating oscillation of the agitator can fully agitate the oily residue deposited in the conical bin, continuously breaking down the compacted structure of the material and keeping the residue in a loose and flowing state. At the same time, on the one hand, heat can quickly and evenly penetrate into the deep layer of the material, further enhancing the heating and heat exchange efficiency of the bottom area of ​​the cone. On the other hand, it can greatly reduce the risk of residue clumping and blocking the slag discharge port, ensuring continuous and stable operation of the slag discharge operation. The reciprocating swing motion of the material agitator causes it to collide with the stop block 800. The vibration force generated by the impact is transmitted to the wall of the conical bin, which can further loosen the residual material deposited in the bin, destroy the adhesion interface between the material and the bin wall, accelerate the material to flow down to the bottom slag discharge port, avoid the material from forming bridges or getting stuck in the cone corner area, further prevent the slag discharge port from being blocked due to material compaction and agglomeration, and ensure continuous and smooth slag discharge operation. By setting up exhaust ports and secondary recovery units, the oil vapor, water vapor, and odorous mixed gases that are volatilized by heating can be treated. The useful oil mixture is separated and returned to the unloading silo, while the separated odorous gases are filtered, purified, and discharged from the unloading silo. This achieves closed-loop resource recovery of volatile oils, reduces raw material loss, improves the overall recovery efficiency of kitchen waste oil, ensures that emissions meet standards, and ultimately achieves leak-free, odorless, and environmentally friendly operation throughout the entire closed unloading process. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 This is one of the structural diagrams of the internal structure of the container of the present invention; Figure 4 This is the second schematic diagram of the internal structure of the container of the present invention; Figure 5 This is a cross-sectional view of the container body of the present invention; Figure 6 This is a schematic diagram of the connection structure between the conical chamber and the heating tube of the present invention; Figure 7 This is a schematic diagram of the structure of the adjustment unit of the present invention; Figure 8 This is a schematic diagram of the secondary recycling unit of the present invention; Figure 9 This is a schematic diagram of the internal structure of the purification box of the present invention.

[0017] In the diagram: 100, silo body; 101, feed pipe; 102, discharge pipe; 103, conical silo; 104, slag discharge pipe; 200, filter frame; 300, filter baffle; 400, steam supply main pipe; 401, heating pipe; 402, branch pipe; 500, annular clamping cavity; 501, baffle; 600, material disturbance component; 700, regulating unit; 701, drive motor; 702, fixing ring; 703, telescopic rod; 704, support rod; 705, sliding sleeve; 706, connecting rod; 707, handle; 800, stop block; 900, secondary recovery unit; 901, separator; 902, exhaust pipe; 903, collection cylinder; 904, purification box; 905, air outlet pipe; 906, packing layer. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1-6 As shown, the present invention provides a closed-type graded filtration and unloading bin for recycling kitchen waste oil, including a bin body 100 with inlet and outlet and a heat flow device. The interior of the silo 100 is vertically provided with at least one filter baffle 300, which divides the interior of the silo 100 into multiple chambers connected in sequence. Each chamber has a conical silo 103 with a slag discharge port at the bottom, and a filter frame 200 connected to the feed inlet of the silo 100 is detachably installed on the upper part of the first chamber. In this embodiment, the inlet of the silo 100 is provided with an inlet pipe 101 and the outlet is provided with an outlet pipe 102. The outlet of the conical silo 103 is provided with an outlet pipe 104. The ends of the outlet pipe 104, the inlet pipe 101 and the outlet pipe 102 are all provided with flange quick-connect fittings.

[0020] The sealed transfer vehicle for waste cooking oil is connected to the feed pipe 101 via a front flange quick-connect connector. The oil first passes through the front detachable filter frame 200, which intercepts bones, plastic bags, and large pieces of kitchen debris. The pre-filtered oil enters the chamber 100. As shown in the figure, the chamber 100 in this embodiment is equipped with two filter baffles 300 (a medium filter baffle and a fine filter baffle with progressively smaller pore sizes) to progressively intercept vegetable leaves, rice grains, and small sand and gravel residues. These are discharged through the bottom slag discharge pipe 104 (pumped into the impurity removal machine for deep filtration). The clean oil after filtration and purification flows by gravity and falls into the lower conical chamber 103 of each chamber for temporary storage. The finely filtered oil material enters the next process through the discharge pipe 102 to achieve graded filtration and recycling of waste cooking oil.

[0021] A maintenance opening is provided at the top of the silo body 100. A fixed plate is fixedly installed at the top center of the maintenance opening, and push-pull plates are movably installed at both ends of the top. It is worth noting that the push-pull plates can be slidably connected to the top of the silo body 100 via slide rails. The driving method can be either electric or manual. If electric drive is used, an electric push rod can be installed on the top wall of the fixed plate. The telescopic end of the electric push rod is fixedly connected to the side of the push-pull plate. The telescopic movement of the electric push rod drives the push-pull cover to slide and move along the slide, realizing the automatic opening and closing of the maintenance and inspection opening for internal maintenance and cleaning. In addition, sealing rubber gaskets can be installed on the mating surfaces and connecting surfaces of the push-pull plates to ensure the overall airtightness of the unloading silo.

[0022] The heat flow device includes a steam pipeline, a first heating component, and a second heating component. The steam pipeline is connected to the steam of the first heating component and the second heating component respectively. The first heating component is located outside each chamber and has several baffles 501 inside it. The baffles 501 are configured to guide the steam flow and accelerate the heat transfer to the grease layer. The second heating component is located between each conical chamber 103 and has several sets of material agitators 600 on it. The material agitators 600 are configured to accelerate the heat transfer to the residue layer and agitate the flow of the residue material.

[0023] The steam supply main pipe 400 for input steam can supply saturated steam to the heating pipe 401 (the steam source can be taken from the centralized steam network of the plant or an independent steam generator), and at the same time, it can supply steam to the annular clamp cavity 500 through the front branch pipe 402, so as to realize the synchronous steam supply of the two heating components.

[0024] In one specific embodiment of the present invention, the first heating component includes an annular cavity 500, which is located between the inner and outer sides of the chamber 100. A plurality of baffles 501 are obliquely arranged at both ends inside the annular cavity 500, and adjacent baffles 501 are staggered vertically to form a bent steam flow path. Part of the baffles 501 extends into the chamber. It should be noted that in order to prevent steam from condensing and accumulating in the annular cavity 500, a drain pipe can be additionally provided to discharge condensate.

[0025] After steam enters the annular jacket 500, it flows synchronously towards the center along the flow channels at both ends of the chamber. Due to the multiple sets of staggered and inclined baffles 501 arranged at both ends of the center of the annular jacket 500, a continuous curved steam flow channel is formed in the annular jacket 500, which effectively extends the residence time and heat exchange path of the steam in the annular jacket 500. This allows the heat carried by the steam to be fully transferred to the chamber through the side wall of the chamber body 100. The annular jacket 500 surrounds the side wall of each chamber, which can form uniform heating of the oil and grease materials in the chamber. At the same time, since the local structure of the baffles 501 extends into the chamber, the steam heat can be directly conducted to the oil and grease materials through the baffles 501, further improving the heating rate and realizing rapid and uniform heating of the oil and grease in the chamber. The second heating component includes a heating tube 401, which extends laterally through the bottom of the conical silo 103. Multiple sets of material handling components 600 are fixed to the outer wall of the heating tube 401 and located inside the conical silo 103. The section of the heating tube 401 located outside the conical silo 103 is provided with an insulation sleeve. Based on this, the insulation sleeve can prevent the rapid loss of heat from the heating tube 401 exposed outside the conical silo 103, thereby effectively ensuring the heating effect of the heating tube 401 on the material inside the conical silo 103.

[0026] The steam pipeline includes two sets of steam supply mains 400 for steam inlet and steam return respectively, forming a steam circulation loop. The heating pipe 401 is located between the two sets of steam supply mains 400, and branch pipes 402 are provided between the two sets of steam supply mains 400 and the chamber 100. The branch pipes 402 are connected to the annular clamp cavity 500.

[0027] Meanwhile, the steam entering the heating tube 401 flows axially along the tube body. Since the heating tube 401 extends laterally through the lower inner cavity of each conical chamber 103, the tube body is directly immersed in the residue material layer deposited at the bottom of the cone, which can directly heat the oily residue falling into the conical chamber 103. At the same time, multiple sets of baffles 600 are arranged on the outer wall of the heating tube 401. Each set of baffles 600 is embedded in the residue material layer of the conical chamber 103, which can further increase the heat exchange contact area and enhance the heat transfer efficiency to the interior of the material. Through the coordinated operation of the first and second heating components and their internal components, full-area gradient heating of the upper layer of grease and the lower layer of residue in the unloading bin can be achieved. While ensuring the fluidity of the grease, material caking is avoided, and problems such as filter pore blockage, poor discharge and difficulty in slag removal caused by low-temperature solidification of materials are effectively prevented. This greatly ensures the continuous and stable operation of graded filtration and unloading.

[0028] Example 2 like Figure 2 , Figure 4 and Figure 7 As shown, the two ends of the heating tube 401 are respectively connected to the ends of the two sets of steam supply main pipes 400 through rotary joints, and the heating tube 401 and the side wall of each conical chamber 103 are sealed and rotated through the sealing bearing. An adjustment unit 700 is provided at one end of the heating tube 401 and outside the conical chamber 103. The adjustment unit 700 is used to drive the heating tube 401 to swing back and forth.

[0029] Steam is introduced into the heating pipe 401, and the reciprocating oscillation of the material agitator 600 can fully agitate the oily residue deposited in the conical bin 103, continuously breaking down the caking structure of the material and keeping the residue material in a loose and flowing state. At the same time, on the one hand, heat can quickly and evenly penetrate into the deep layer of the material, further enhancing the heating and heat exchange efficiency of the bottom area of ​​the cone. On the other hand, it can greatly reduce the risk of residue clumping and blocking the slag discharge port, ensuring the continuous and stable operation of the slag discharge operation.

[0030] In this embodiment, the adjustment unit 700 includes: two fixed rings 702, which are symmetrically arranged on the outer wall of the heating tube 401, and telescopic rods 703 are symmetrically arranged at the bottom ends of the two fixed rings 702. A support rod 704 is connected between the bottom ends of the two telescopic rods 703, and a sliding sleeve 705 is slidably sleeved on the outer wall of the support rod 704; a drive motor 701, the output end of which is connected to a handle 707, and a connecting rod 706 is arranged at the end of the handle 707. The top end of the connecting rod 706 is movably connected to the sliding sleeve 705 through a bearing. During operation, the drive motor 701 drives the rotating handle 707 to rotate, which in turn drives the connecting rod 706 to make a circular motion. The connecting rod 706 can drive the sliding sleeve 705 to slide back and forth along the support rod 704, which in turn drives the telescopic rod 703 to extend and retract. The telescopic rod 703 drives the heating tube 401 to reciprocate through the fixed ring 702, which in turn causes the heating tube 401 to drive each set of material handling components 600 to reciprocate within their respective conical chambers 103.

[0031] It should be noted that the structural shape of the material disturbance component 600 can be customized according to the characteristics of the material composition trapped in the conical bin 103 to match the disturbance, anti-clogging and heat exchange requirements of residues with different particle sizes and shapes. For example, in the conical bin 103 at the front end, the retained residue is mainly long fibrous debris such as vegetable leaves and large pieces of organic matter from kitchen waste. Therefore, the material handling component 600 in this area can adopt a blade-shaped structure with a cutting edge to cut and crush the material as it swings. Correspondingly, in the conical bin 103 at the rear end, a strip-shaped plate structure can be adopted to loosen the material through the reciprocating swing of the strip plate and break the compacted state of the granular material.

[0032] Example 3 like Figure 3 and Figure 6 As shown, the conical chamber 103 has several blocks 800 on its inner bottom side facing the material disturber 600. The blocks 800 are configured to collide with the material disturber 600 when it moves, causing the conical chamber 103 to vibrate. It is worth noting that the blocks 800 can be made of oil-resistant rubber, polyurethane elastomer, etc., which have both wear resistance and oil resistance.

[0033] During operation, when the material swaying component 600 swings back and forth to its maximum stroke on both sides, the end of the material swaying component 600 can hit the corresponding side of the stop block 800 on the inner wall of the conical bin 103. The vibration force generated by the impact is transmitted to the bin wall of the conical bin 103 through the stop block 800, which can further loosen the residual material deposited in the bin, destroy the adhesion interface between the material and the bin wall, accelerate the material to flow down to the bottom slag discharge port, avoid the material from forming bridges and jams in the cone corner area, further prevent the slag discharge port from being blocked due to material compaction and agglomeration, and ensure continuous and smooth slag discharge operation.

[0034] It is worth noting that when the material slugging component 600 is a blade-shaped cutter body structure with a cutting edge, the stop block 800 on the inner wall of the conical chamber 103 in this area can be removed to avoid damage such as chipping and curling caused by repeated impacts between the cutting edge of the cutter body and the stop block 800. If it is necessary to retain the vibration and flow promotion effect in this area, a plate impact stop block 800 can also be set separately.

[0035] Example 4 like Figures 1-2 and Figures 8-9 As shown, the fixed plate is provided with an exhaust port that communicates with the compartment, and a secondary recovery unit 900 is provided at the exhaust port.

[0036] In this embodiment, the secondary recycling unit 900 includes: a separator 901, which is fixedly connected to the top of the fixed plate by a bracket, and its air inlet is connected to an exhaust pipe 902, and its air outlet is connected to a fan, with one end of the exhaust pipe 902 connected to the exhaust outlet; a collection cylinder 903, the top end of which is connected to the bottom end of the separator 901, and the bottom end is connected to the chamber through a pipe, with a solenoid valve installed on the pipe; and a purification box 904, which is fixedly connected to the top of the fixed plate by a frame, and its top end is connected to the air outlet of the fan, with an air outlet pipe 905 connected to the bottom end of the purification box 904, and at least one set of packing layers 906 is provided inside the purification box 904.

[0037] Because the unloading hopper is a sealed design, the grease inside the hopper will evaporate water vapor, light oil vapor, and malodorous gaseous components when heated, causing the air pressure inside the hopper to rise continuously. If the positive pressure inside the hopper cannot be balanced in time, problems such as pressure buildup during feeding and overflow can easily occur. In order to solve this problem, in this embodiment: By setting an exhaust port connected to the secondary recovery unit 900, and opening the exhaust pipe 902 through a valve, the fan provides suction, causing the volatile oil vapor, water vapor and malodorous mixed gas to pass tangentially through the exhaust port and exhaust pipe 902 into the separator 901. Under the centrifugal settling action of the cyclone separator 901, the oil mist droplets and fine solid particles entrained in the airflow are separated and captured, falling down the wall of the separator into the collection cylinder 903 at the bottom. The airflow after the droplets and dust are removed then gathers upward and enters the purification box 904. The grease mixture falling into the collection cylinder 903 can be returned to the unloading hopper through the pipeline, thereby realizing the closed-loop recycling of volatile grease, reducing raw material loss, and improving the overall recycling efficiency of kitchen waste grease. The gas entering the purification box 904 can be deeply purified through the packing layer 906. The packing layer 906 can be one or more combinations of honeycomb activated carbon fiber, modified zeolite packing, and biological deodorizing packing to adsorb volatile organic acids, sulfur-containing odor components and VOCs in the purified gas flow, ensuring that the emission gas meets the standards, and ultimately achieving leak-free, odorless and environmentally friendly operation throughout the closed unloading process.

[0038] It should be noted that temperature and pressure sensors can be installed in the unloading hopper to collect the material temperature, gas phase temperature and gas pressure parameters in the hopper in real time. The packing layer 906 can adopt a pull-out modular design for easy maintenance and replacement. Not all of them are shown in the figure. They are all conventional technical means in this field, so they will not be described in detail.

[0039] Working principle and process: During operation, the sealed transfer vehicle for waste cooking oil is connected to the feed pipe 101 via the front flange quick-connect joint. The oil first passes through the front detachable filter frame 200, which first intercepts bones, plastic bags and large pieces of kitchen debris. The pre-filtered oil enters the compartment 100. Multiple filter baffles 300 are installed in sequence in the compartment 100 to progressively intercept vegetable leaves, rice grains and small sand and gravel residues. The clean oil after filtration and purification flows by gravity and falls into the conical compartment 103 at the bottom of each compartment for temporary storage. Saturated steam can be introduced into the heating pipe 401 through the steam supply main pipe 400, and at the same time, it is introduced into the annular clamp cavity 500 through the front branch pipe 402 to realize the synchronous steam supply of the two heating components. After steam enters the annular jacket 500, it flows along the continuous, curved steam channel formed by the baffles 501 at both ends of the chamber. The annular jacket 500 surrounds the side walls of each compartment, providing uniform heating to the oily materials within the compartment. Simultaneously, the portion of the baffles 501 extending into the interior of the compartment can directly transfer the heat from the steam to the oily materials. Meanwhile, the steam entering the heating pipe 401 flows axially along the pipe body, which is directly immersed in the layer of residue material deposited at the bottom of the cone. This allows for direct heating of the oily residue falling into the conical compartment 103. Furthermore, the multiple sets of baffles 600 arranged on the outer wall of the heating pipe 401 further increase the heat exchange contact area and enhance the efficiency of heat transfer to the interior of the material. The reciprocating oscillation of the mixing component 600 can fully agitate the oily residue deposited in the conical bin 103, continuously breaking down the material's compacted structure and keeping the residue in a loose and flowing state. This allows heat to penetrate quickly and evenly to the deep layers of the material, while also greatly reducing the risk of residue clumping and clogging the discharge port. During the heating process of the oil, the volatilized oil vapor, water vapor, and malodorous mixed gas enter the secondary recovery unit 900 through the exhaust port. The secondary recovery unit 900 separates the useful oil mixture and returns it to the unloading bin. The separated malodorous gas is filtered and purified before being discharged from the unloading bin. Finally, the residue is discharged through the bottom slag discharge pipe 104, and the finely filtered oil material enters the next process through the discharge pipe 102.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A closed-type graded filtration and unloading bin for recycling kitchen waste oil, characterized in that, Includes a silo body (100) with inlet and outlet ports and a heat flow device; The silo body (100) is vertically provided with at least one filter baffle (300) to divide the interior of the silo body (100) into multiple chambers connected in sequence. Each chamber has a conical silo (103) with a slag discharge port at the bottom, and a filter frame (200) connected to the feed inlet of the silo body (100) can be detachably installed on the upper part of the first chamber. The heat flow device includes a steam pipeline, a first heating component, and a second heating component. The steam pipeline is connected to the steam of the first heating component and the second heating component respectively. The first heating component is located outside each chamber and has several baffles (501) inside it. The baffles (501) are configured to guide the steam flow and accelerate the heat transfer to the grease layer. The second heating component is located between each conical chamber (103) and has several sets of material disturbance components (600) on it. The material disturbance components (600) are configured to accelerate the heat transfer to the residue layer and disturb the flow of the residue material.

2. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 1, characterized in that, The first heating component includes an annular cavity (500), which is located between the inner and outer sides of the chamber (100). Several baffles (501) are obliquely arranged at both ends inside the annular cavity (500), and adjacent baffles (501) are staggered vertically to form a bent steam flow path. The baffles (501) extend into the interior of the chamber. The second heating component includes a heating tube (401), which extends laterally through the bottom of the conical chamber (103). Multiple sets of the material handling components (600) are fixed to the outer wall of the heating tube (401) and located inside the conical chamber (103). The section of the heating tube (401) located outside the conical chamber (103) is provided with a heat insulation sleeve. The steam pipeline includes two sets of steam supply mains (400) for steam inlet and steam return respectively, forming a steam circulation loop. The heating pipe (401) is located between the two sets of steam supply mains (400), and branch pipes (402) are provided between the two sets of steam supply mains (400) and the chamber (100). The branch pipes (402) are connected to the annular cavity (500).

3. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 2, characterized in that, The two ends of the heating tube (401) are respectively connected to the ends of two sets of steam supply main pipes (400) through rotary joints. The heating tube (401) and the side wall of each conical chamber (103) are sealed and rotated through the joints. An adjustment unit (700) is provided at one end of the heating tube (401) outside the conical chamber (103). The adjustment unit (700) is used to drive the heating tube (401) to swing back and forth.

4. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 3, characterized in that, The adjustment unit (700) includes: Two fixing rings (702) are symmetrically arranged on the outer wall of the heating tube (401), and telescopic rods (703) are symmetrically arranged at the bottom ends of the two fixing rings (702). A support rod (704) is connected between the bottom ends of the two telescopic rods (703), and a sliding sleeve (705) is slidably sleeved on the outer wall of the support rod (704). A drive motor (701) has a handle (707) connected to its output end. A connecting rod (706) is provided at the end of the handle (707). The top end of the connecting rod (706) is movably connected to a sliding sleeve (705) through a bearing.

5. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 1, characterized in that, The conical bin (103) has several blocks (800) facing the material disturber (600) on its inner bottom side. The blocks (800) are configured to collide with the material disturber (600) and cause the conical bin (103) to vibrate when the material disturber (600) moves.

6. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 1, characterized in that, The inlet of the silo body (100) is provided with a feed pipe (101), and the outlet is provided with a discharge pipe (102). The outlet of the conical silo (103) is provided with a discharge pipe (104), and the ends of the discharge pipe (104), the feed pipe (101) and the discharge pipe (102) are all provided with flange quick-connect joints.

7. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 1, characterized in that, The top of the compartment (100) is provided with a maintenance port, a fixing plate is fixedly provided at the top middle of the maintenance port, and push-pull plates are movably provided at both ends of the top.

8. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 7, characterized in that, The fixed plate is provided with an exhaust port that communicates with the compartment, and a secondary recovery unit (900) is provided at the exhaust port.

9. The closed-type graded filtration and unloading bin for recycling kitchen waste oil according to claim 8, characterized in that, The secondary recycling unit (900) includes: The separator (901) is fixedly connected to the top of the fixed plate by a bracket, and its air inlet is connected to an exhaust pipe (902), and its air outlet is connected to a fan. One end of the exhaust pipe (902) is connected to the exhaust outlet. A collection cylinder (903) is provided, the top end of which is connected to the bottom end of the separator (901), and the bottom end is connected to the chamber through a pipe, and a solenoid valve is provided on the pipe. The purification box (904) is fixedly connected to the top of the fixed plate by a frame, and its top end is connected to the air outlet of the fan. The bottom end of the purification box (904) is connected to the air outlet pipe (905), and the interior of the purification box (904) is provided with at least one set of packing layer (906).

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