A kitchen waste resourceful drying recovery device and method

Abstract

The application discloses a kind of kitchen garbage resourceization drying recovery device and method, belong to biomass garbage incinerator technical field, wherein catering waste pretreatment efficient drying device, including cylinder, fence drying mechanism is fixedly arranged in the inside of cylinder, fence drying mechanism is isolated to form two drying cavities inside cylinder;Two drying cavities are respectively corresponding first screw conveying mechanism and second screw conveying mechanism are provided, the helical blade of first screw conveying mechanism partially extends into the clearance of fence drying mechanism, the helical blade of second screw conveying mechanism and the helical blade of first screw conveying mechanism staggered interlaced arrangement and outside is equipped with cleaning paddle;Solve the technical defects that existing equipment is not uniform, prone to material blocking, no material crushing function, cannot be circulated and fine drying, dehydration efficiency is low, single working condition, realize catering waste continuous drying, circulating depth drying, material scattering extrusion, water vapor liquid seepage active extraction integrated pretreatment operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of biomass waste incinerators, and particularly relates to a resource-based drying and recycling device and method for food waste. Background Art

[0002] Food waste is an important raw material for biomass resource utilization. After drying and dewatering pretreatment, it can be sent to a biomass incinerator for incineration power generation and heat energy utilization, which is an important way for solid waste resource recycling. At present, the pre-drying equipment supporting biomass incinerators mostly adopts a single drum drying and fixed fence drying structure, with a single structure and function. It only relies on a single heating surface to achieve contact drying of materials, and is the mainstream equipment for food waste pretreatment.

[0003] The drying equipment in the prior art has obvious defects in actual use. First, only the contact part of the material with the drying structure can be quickly dried, and the drying of the non-contact area lags behind, easily resulting in uneven dryness and undercooked materials, with poor drying uniformity. Second, food waste has a high moisture content and high viscosity, and is extremely easy to adhere and block in the gaps of the drying structure. Long-term accumulation will block the drying air duct and material channel, continuously reduce the drying efficiency, increase the equipment failure rate and shutdown cleaning cost. Third, traditional equipment only has a single-direction continuous feeding and drying function, and cannot disperse agglomerated wet waste, nor can it achieve closed-loop deep drying. High-humidity food waste is difficult to reach the dehydration standard and cannot adapt to the stable feeding conditions of the biomass incinerator.

[0004] In addition, the existing drying equipment only relies on heat conduction to achieve drying, and can only remove the surface moisture of the material, and cannot actively extract the leachate inside the material and the water vapor generated by drying. The dehydration efficiency is low and the drying energy consumption is high. At the same time, the equipment has no material extrusion and reciprocating cycle drying structure, and cannot switch the operation mode according to the feeding humidity, with poor working condition adaptability, and it is difficult to meet the production requirements of large-scale and refined food waste pretreatment. Based on the many defects of the above-mentioned prior art, there is an urgent need to design a food waste pretreatment drying device with optimized structure, integrated functions and high drying efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient drying device for food waste pretreatment in view of the deficiencies of the prior art, to solve the technical defects of uneven drying, easy material jamming and adhesion, no material crushing function, inability to recycle and precisely dry, low dehydration efficiency, and single working condition of the existing equipment, and to achieve an integrated pretreatment operation of continuous drying, cyclic deep drying, material dispersion and extrusion, and active extraction of water vapor and leachate of food waste.

[0006] This invention is implemented as follows: a high-efficiency drying device for pre-treatment of catering waste includes a cylindrical body. A grid-type drying mechanism is fixedly installed inside the cylindrical body, isolating the interior of the cylindrical body into two drying chambers. A first spiral conveying mechanism and a second spiral conveying mechanism are respectively installed within the two drying chambers. The spiral blades of the first spiral conveying mechanism partially extend into the gaps of the grid-type drying mechanism. The spiral blades of the second spiral conveying mechanism are staggered and interleaved with the spiral blades of the first spiral conveying mechanism, and cleaning blades are provided on their outer sides. The first and second spiral conveying mechanisms are each matched with independent drive components. The two sets of drive components are used to control the two sets of spiral conveying mechanisms to rotate in the same or opposite directions, and at the same or different speeds. A medium channel is opened inside the rotating shaft of the second spiral conveying mechanism. The shaft body has flow micropores communicating with the medium channel. The medium channel is used to connect to external equipment to achieve medium injection or fluid negative pressure suction operations.

[0007] As a preferred embodiment of the present invention, the grid-type drying mechanism includes an upper crossbar and a lower crossbar arranged in parallel, and a plurality of vertically arranged drying rods fixed between the upper and lower crossbars at equal intervals, with a uniform material passage and drying gap formed between adjacent vertically arranged drying rods.

[0008] As a preferred embodiment of the present invention, the first spiral conveying mechanism includes a first rotating shaft and a first spiral blade, the first spiral blade being fixedly wound around the outside of the first rotating shaft, and the edge of the first spiral blade extending into the gap of the grid-type drying mechanism.

[0009] As a preferred embodiment of the present invention, the second spiral conveying mechanism includes a second rotating shaft and a second spiral blade. The pitch of the second spiral blade is the same as that of the first spiral blade. The second spiral blade does not extend into the gap of the grid-type drying mechanism. The cleaning blades are arranged in an arc-shaped uniform array on the outer edge of the second spiral blade.

[0010] As a preferred embodiment of the present invention, the driving component is an independent servo motor, and the two sets of servo motors are electrically connected to the control system respectively, for independently adjusting the rotation direction and rotation speed of the rotating shaft.

[0011] As a preferred embodiment of the present invention, the cylinder is provided with an openable and closable inlet and outlet. When the inlet and outlet are completely closed, the cylinder and the grid-type drying mechanism cooperate to form a closed-loop drying chamber.

[0012] As a preferred embodiment of the present invention, the end of the medium channel of the second rotating shaft is connected to an external pipeline through a sealed rotary joint, and the external pipeline is respectively connected to a hot air supply device, a compressed air purging device and a negative pressure suction device.

[0013] As a preferred embodiment of the present invention, a straight lever is fixedly connected to the first rotating shaft, and the end of the straight lever can fit against one side of the drying rod.

[0014] As a preferred embodiment of the present invention, the cylinder is a double-arc cylinder, and both the upper and lower parts are provided with receiving grooves, and the grid-type drying mechanism is fixedly installed in the receiving grooves.

[0015] A high-efficiency drying method for pre-treatment of food waste employs a high-efficiency drying device to complete the pre-treatment and drying operation of the food waste. The drying device includes a cylinder, a grid-type drying mechanism fixed inside the cylinder, and a first spiral conveying mechanism and a second spiral conveying mechanism located in cavities on both sides of the grid-type drying mechanism. The spiral blades of the first spiral conveying mechanism partially extend into the gaps of the grid-type drying mechanism. The spiral blades of the second spiral conveying mechanism are equipped with cleaning blades on their outer sides, and the rotating shaft has a built-in medium channel with microporous flow holes. The first and second spiral conveying mechanisms are each equipped with independent drive components. The drying method includes the following steps: S1. Feeding and feeding: The high-moisture food waste to be processed is fed into the cylinder. The cylinder is divided into two cavities by a grid-type drying mechanism to achieve double-sided feeding. Two sets of independent drive components are started, and the corresponding operation mode is matched according to the moisture content of the material. S2. Normalized continuous drying operation: For catering waste with normal moisture content, the first spiral conveyor and the second spiral conveyor are controlled to rotate in the same direction, driving the material to continuously move, tumble and convey along the surface of the grid-type drying mechanism. The structure of the first spiral blade extending into the gap cleans the material stuck in the gap in real time, and the outer blade of the second spiral blade cleans the material sticking and clumping, so that the material is evenly attached to the grid-type drying mechanism to complete continuous heat exchange and drying. S3. Deep Circulation Drying Operation for High Moisture Materials: For high moisture and clumped catering waste, the inlet and outlet ports of the cylinder are closed to form a sealed cavity. The first and second spiral conveyor mechanisms are controlled to rotate in opposite directions and / or at different speeds. The staggered structure of the two sets of spiral blades forms a squeezing, rubbing and shearing effect on the material, breaking up the clumps and increasing the fluffiness of the material. At the same time, the material is driven to shuttle back and forth between the double-sided cavity and the gap of the grid-type drying mechanism, realizing deep circulation dehydration of the material by multiple contact with the drying mechanism. S4. Media-assisted enhanced drying and purification operation: During the above drying operation, external equipment is selectively connected through the media channel and flow micropores inside the second rotating shaft. Hot air and compressed air are introduced into the cavity through the micropores to enhance the heat exchange and drying of the material, purge and prevent blockage, or the negative pressure mode is turned on to actively extract the leachate and water vapor generated by the drying of the material, quickly stripping the free water inside the material, completing the efficient pre-treatment and drying process of catering waste, and obtaining finished material with uniform moisture content that is suitable for combustion in a biomass combustion furnace.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention adopts a double-sided staggered double-helix structure, which can realize continuous mixing and conveying of materials through synchronous rotation in the same direction, so that the materials fit the drying mechanism in all directions, completely solving the problems of uneven drying contact, large difference between dry and wet materials, and half-drying in traditional equipment, and greatly improving the overall drying uniformity.

[0017] 2. The first spiral blade of this invention extends into the drying gap, and the second spiral blade works in conjunction with the outer side of the paddle to clean the gap and the surface material in real time, which can prevent material accumulation and blockage. This solves the defects of traditional equipment such as easy jamming, efficiency reduction and high failure rate, and ensures long-term stable operation of the equipment.

[0018] 3. The second rotating shaft of this invention has a built-in medium channel and flow micropores, which can introduce hot air and compressed air to enhance drying and prevent clogging. It can also actively extract material leachate and drying moisture through negative pressure, reduce the material moisture content from the source, greatly improve drying efficiency, reduce drying energy consumption, and is suitable for large-scale biomass pretreatment production scenarios.

[0019] 4. This device can freely switch between continuous mass drying and closed-loop deep drying modes, adapting to the pretreatment needs of food waste with different humidity and conditions. It is highly versatile and practical, and can stably provide raw materials with uniform moisture content to the downstream biomass combustion furnace, ensuring stable operation of the combustion furnace. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the high-efficiency drying device for pre-treatment of catering waste provided in an embodiment of the present invention; Figure 2 This is a second-view structural schematic diagram of the high-efficiency drying device for pretreatment of catering waste provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the high-efficiency drying device for pretreatment of catering waste provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the grid-type drying mechanism and the first spiral conveying mechanism provided in the embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the fence-type drying mechanism, the first spiral conveying mechanism, and the second spiral conveying mechanism provided in the embodiments of the present invention; Figure 6 This is provided by the embodiments of the present invention. Figure 5 A magnified structural diagram of part A in the middle; Figure 7 This is a connection diagram of the hot air supply device, compressed air purging device, negative pressure suction device, and medium channel provided in the embodiments of the present invention.

[0021] In the diagram: 1. Cylinder; 2. Fence-type drying mechanism; 201. Upper crossbar; 202. Lower crossbar; 203. Drying rod; 3. First spiral conveying mechanism; 301. First rotating shaft; 302. First spiral blade; 4. Second spiral conveying mechanism; 401. Second rotating shaft; 402. Second spiral blade; 5. Cleaning paddle; 6. Medium channel; 7. Flow micropore; 8. Feed inlet; 9. Discharge outlet; 10. Hot air supply equipment; 11. Compressed air purging equipment; 12. Negative pressure suction equipment; 13. Straight paddle; 14. Receiving tank. Detailed Implementation

[0022] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0023] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1 to 7 As shown in the figure, an embodiment of the present invention provides a high-efficiency drying device for pre-treatment of catering waste, including a cylinder 1. A grid-type drying mechanism 2 is fixedly installed inside the cylinder 1, which isolates the inside of the cylinder 1 to form two drying chambers. A first spiral conveying mechanism 3 and a second spiral conveying mechanism 4 are respectively installed in the two drying chambers. The spiral blades of the first spiral conveying mechanism 3 partially extend into the gaps of the grid-type drying mechanism 2. The spiral blades of the second spiral conveying mechanism 4 are staggered and interleaved with the spiral blades of the first spiral conveying mechanism 3, and a cleaning blade 5 is provided on the outside. The first spiral conveying mechanism 3 and the second spiral conveying mechanism 4 are respectively matched with independent drive components. The two sets of drive components are used to control the two sets of spiral conveying mechanisms to rotate in the same or opposite directions, and to rotate at the same speed or at a different speed. A medium channel 6 is opened inside the rotating shaft of the second spiral conveying mechanism 4. The rotating shaft rod is provided with a flow microhole 7 that connects to the medium channel 6. The medium channel 6 is used to connect with external equipment to realize medium injection or fluid negative pressure suction operation.

[0025] Specifically, a grid-type drying mechanism 2 is fixedly installed in the middle of the cylinder 1. Multiple equidistant vertical rods form a hollow drying structure, dividing the cylinder 1 into two independent chambers, left and right. The left chamber of the dryer is equipped with a first rotating shaft 301 and a first spiral blade 302, with the blades partially extending into the gaps between the vertical rods. The right chamber is equipped with a second rotating shaft 401 and a second spiral blade 402. The two sets of blades have the same pitch and are staggered. The outer side of the second blades features an array of arc-shaped paddles that conform to the outer wall of the vertical rods. Both sets of rotating shafts are driven by independent servo motors, enabling various operating modes including same-direction and same-speed, same-direction and differential-speed, and reverse-direction and differential-speed. Under normal continuous drying conditions, the two sets of spiral blades rotate synchronously in the same direction, coordinating to tumble and convey materials. The first blade continuously cleans the gaps where materials are stuck, while the second blade, in conjunction with the paddles, cleans the outer wall of materials adhering to it. The materials continuously maintain full contact with the drying vertical rods, achieving uniform drying and continuous feeding and discharging operations. Under the deep drying condition of high-moisture materials, the feed inlet 8 and discharge outlet 9 of the cylinder 1 are closed to form a sealed cavity; the two sets of rotating shafts are controlled to rotate in opposite directions at different speeds, and the staggered spiral blades and paddles squeeze, rub and break up the clumps of catering waste to improve the fluffiness of the material; at the same time, the material is driven to shuttle back and forth between the left and right cavities and the gap between the vertical rods, and repeatedly fits the drying structure to achieve deep dehydration and drying.

[0026] Specifically, the second rotating shaft 401 has a built-in through-medium channel 6 and evenly distributed micropores 7 around its perimeter. During operation, the working mode can be switched according to requirements: high-temperature hot air is introduced to directly blow material through the micropores, enhancing the internal drying effect; compressed air is introduced to achieve micropore jet purging, preventing material adhesion and accumulation on the rotating shaft and blades; negative pressure suction is activated to actively extract leachate and moisture generated during drying through the micropores, rapidly reducing the overall moisture content of the material and significantly improving drying efficiency. This device integrates continuous drying, circulating fine drying, material dispersing, anti-clogging cleaning, and active dehydration into one unit, effectively solving various defects of traditional catering waste drying equipment. With its novel structure, flexible operating conditions, and excellent drying effect, it is highly suitable as a dedicated pre-treatment drying device for biomass combustion furnaces, possessing extremely high practical value and promising prospects for promotion.

[0027] Specifically, the grid-type drying mechanism 2 includes an upper crossbar 201 and a lower crossbar 202 arranged in parallel, and a plurality of vertically arranged drying rods 203 equidistantly fixed between the upper and lower crossbars 202, forming a uniform material passage and drying gap between adjacent vertically arranged drying rods 203. The first spiral conveying mechanism 3 includes a first rotating shaft 301 and a first spiral blade 302, the first spiral blade 302 being fixedly wound around the outside of the first rotating shaft 301, and the edge of the first spiral blade 302 extending into the gap of the grid-type drying mechanism 2. The second spiral conveying mechanism 4 includes a second rotating shaft 401 and a second spiral blade 402, the second spiral blade 402 having the same pitch specification as the first spiral blade 302, the second spiral blade 402 not extending into the gap of the grid-type drying mechanism 2, and the cleaning paddles 5 being uniformly arrayed in an arc shape on the outer edge of the second spiral blade 402. The driving component is an independent servo motor, and the two sets of servo motors are electrically connected to the control system respectively, for independently adjusting the rotation direction and rotation speed of the rotating shaft. This invention features dual rotating shafts that support reverse differential rotation, enabling the squeezing, rubbing, and breaking up of clumped food waste. It achieves material fluffing without the need for pre-crushing equipment. Simultaneously, the inlet and outlet can be closed to form a closed cavity, driving the material to circulate and dry in both cavities, achieving deep dehydration of high-moisture materials and solving the problem of traditional equipment having a single operating condition and being unable to perform fine drying.

[0028] Specifically, the cylinder 1 is provided with an openable and closable inlet 8 and outlet 9, for example, using a push-pull baffle structure. When the inlet 8 and outlet 9 are completely closed, the cylinder 1 and the grid-type drying mechanism 2 cooperate to form a closed-loop drying chamber. The end of the medium channel 6 of the second rotating shaft 401 is connected to an external pipeline through a sealed rotary joint. The external pipeline is connected to a hot air supply device 10, a compressed air purging device 11, and a negative pressure suction device 12, respectively. A straight blade 13 is fixedly connected to the first rotating shaft 301, and the end of the straight blade 13 can fit against one side of the drying rod 203. The cylinder 1 is a double-arc cylinder, and both the upper and lower parts are provided with receiving grooves 14. The grid-type drying mechanism 2 is fixedly installed in the receiving grooves 14.

[0029] A high-efficiency drying method for pre-treatment of food waste employs a high-efficiency drying device to complete the pre-treatment and drying of food waste. The drying device includes a cylinder 1, a grid-type drying mechanism 2 fixed inside the cylinder 1, and a first spiral conveying mechanism 3 and a second spiral conveying mechanism 4 located on either side of the grid-type drying mechanism 2. The spiral blades of the first spiral conveying mechanism 3 partially extend into the gaps of the grid-type drying mechanism 2. The spiral blades of the second spiral conveying mechanism 4 are provided with cleaning blades 5 on their outer sides, and the rotating shaft has a built-in medium channel 6 with flow micropores 7. The first spiral conveying mechanism 3 and the second spiral conveying mechanism 4 are each equipped with an independent drive assembly. The drying method includes the following steps: S1. Feeding and feeding: The high-moisture catering waste to be processed is fed into the cylinder 1. The cylinder 1 is divided into two cavities by the grid-type drying mechanism 2 to achieve double-sided feeding. Two sets of independent drive components are started to match the corresponding operation mode according to the moisture content of the material. S2. Normalized continuous drying operation: For catering waste with normal moisture content, the first spiral conveyor 3 and the second spiral conveyor 4 are controlled to rotate in the same direction, driving the material to continuously move, tumble and convey along the surface of the grid-type drying mechanism 2. The structure of the first spiral blade 302 extending into the gap cleans the material stuck in the gap in real time. The outer blade of the second spiral blade 402 cleans the material sticking and clumping, so that the material is evenly attached to the grid-type drying mechanism 2 throughout the entire area to complete continuous heat exchange and drying. S3. Deep Circulation Drying Operation for High Moisture Materials: For high moisture and clumped catering waste, the feed and discharge ports of cylinder 1 are closed to form a sealed cavity. The first spiral conveyor mechanism 3 and the second spiral conveyor mechanism 4 are controlled to rotate in opposite directions and / or at different speeds. The structure of the two sets of spiral blades is staggered to form a squeezing, rubbing and shearing effect on the material, breaking up the clumped material and improving the fluffiness of the material. At the same time, the material is driven to shuttle back and forth between the double-sided cavity and the gap of the grid-type drying mechanism 2, so as to realize the deep circulation dehydration of the material by multiple contact with the drying mechanism. S4. Media-assisted enhanced drying and purification operation: During the above drying operation, external equipment is selectively connected through the internal media channel 6 and flow micro-holes 7 of the second rotating shaft 401. Hot air and compressed air are introduced into the cavity through the micro-holes to enhance the heat exchange and drying of the material, purge and prevent blockage, or the negative pressure mode is turned on to actively extract the leachate and water vapor generated by the drying of the material, quickly stripping the free water inside the material, completing the efficient pre-treatment and drying process of catering waste, and obtaining finished material with uniform moisture content that is suitable for combustion in a biomass combustion furnace.

[0030] 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 process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency drying device for pre-treatment of catering waste, characterized in that: The device includes a cylindrical body (1), inside which a grid-type drying mechanism (2) is fixedly installed. The grid-type drying mechanism (2) isolates the inside of the cylindrical body (1) to form two drying chambers. The two drying chambers are respectively equipped with a first spiral conveying mechanism (3) and a second spiral conveying mechanism (4). The spiral blades of the first spiral conveying mechanism (3) partially extend into the gap of the grid-type drying mechanism (2). The spiral blades of the second spiral conveying mechanism (4) are staggered and interleaved with the spiral blades of the first spiral conveying mechanism (3), and a cleaning paddle (5) is provided on the outside. The first spiral conveying mechanism (3) and the second spiral conveying mechanism (4) are respectively matched with independent drive components. The two sets of drive components are used to control the two sets of spiral conveying mechanisms to rotate in the same or opposite direction, and to rotate at the same speed or at a different speed. The rotating shaft of the second spiral conveying mechanism (4) has a medium channel (6) inside. The rotating shaft rod is provided with a flow microhole (7) that connects to the medium channel (6). The medium channel (6) is used to connect to external equipment to realize medium injection or fluid negative pressure suction operation.

2. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The grid-type drying mechanism (2) includes an upper horizontal bar (201) and a lower horizontal bar (202) arranged in parallel, and a number of vertically arranged drying rods (203) arranged at equal intervals and fixed between the upper and lower horizontal bars (202), forming a uniform material passing and drying gap between adjacent vertically arranged drying rods (203).

3. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The first spiral conveying mechanism (3) includes a first rotating shaft (301) and a first spiral blade (302). The first spiral blade (302) is fixedly arranged around the outside of the first rotating shaft (301), and the edge of the first spiral blade (302) extends into the gap of the grid-type drying mechanism (2).

4. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The second spiral conveying mechanism (4) includes a second rotating shaft (401) and a second spiral blade (402). The second spiral blade (402) has the same pitch specification as the first spiral blade (302). The second spiral blade (402) does not extend into the gap of the grid-type drying mechanism (2). The cleaning blade (5) is arranged in an arc shape and uniformly on the outer edge of the second spiral blade (402).

5. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The drive component is an independent servo motor. The two sets of servo motors are electrically connected to the control system and are used to independently adjust the rotation direction and rotation speed of the shaft.

6. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The cylinder (1) is provided with an openable and closable inlet (8) and outlet (9). When the inlet (8) and outlet (9) are completely closed, the cylinder (1) and the grid-type drying mechanism (2) cooperate to form a closed-loop drying chamber.

7. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The end of the medium channel (6) of the second rotating shaft (401) is connected to an external pipeline through a sealed rotary joint. The external pipeline is connected to a hot air supply device (10), a compressed air purging device (11), and a negative pressure suction device (12), respectively.

8. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: A straight lever (13) is fixedly connected to the first rotating shaft (301), and the end of the straight lever (13) can fit against one side of the drying rod (203).

9. The high-efficiency drying device for pretreatment of catering waste according to claim 1, characterized in that: The cylinder (1) is a double-arc cylinder, and both the upper and lower parts are provided with receiving grooves (14). The grid-type drying mechanism (2) is fixedly installed in the receiving grooves (14).

10. A highly efficient drying method for pre-treatment of food waste, characterized in that, A high-efficiency drying device for food waste pretreatment is used to complete the drying pretreatment operation of food waste. The drying device includes a cylinder (1), a grid-type drying mechanism (2) fixed inside the cylinder (1), a first spiral conveying mechanism (3) and a second spiral conveying mechanism (4) respectively disposed in the cavities on both sides of the grid-type drying mechanism (2). The spiral blades of the first spiral conveying mechanism (3) partially extend into the gap of the grid-type drying mechanism (2). The spiral blades of the second spiral conveying mechanism (4) are provided with cleaning blades (5) on the outside and the rotating shaft has a medium channel (6) with flow micropores (7). The first spiral conveying mechanism (3) and the second spiral conveying mechanism (4) are respectively equipped with independent drive components. The drying method includes the following steps: S1, Feeding and feeding: The high-moisture catering waste to be processed is fed into the cylinder (1). The cylinder (1) is divided into two cavities by the grid-type drying mechanism (2) to achieve double-sided feeding. Two sets of independent drive components are started, and the corresponding operation mode is matched according to the moisture content of the material. S2, Normalized Continuous Drying Operation: For catering waste with normal moisture content, the first spiral conveyor (3) and the second spiral conveyor (4) are controlled to rotate in the same direction, driving the material to continuously move, stir and convey along the surface of the grid-type drying mechanism (2). The structure of the first spiral blade (302) extending into the gap cleans the material stuck in the gap in real time, and the outer blade of the second spiral blade (402) cleans the material sticking and clumping, so that the material is evenly attached to the grid-type drying mechanism (2) throughout the entire area to complete continuous heat exchange drying; S3. Deep circulation drying operation of high-moisture materials: For high-moisture clumped catering waste, close the feed and discharge ports of the cylinder (1) to form a closed cavity, control the first spiral conveyor (3) and the second spiral conveyor (4) to rotate in opposite directions and / or at different speeds, and use the structure of the two sets of spiral blades to squeeze, rub and shear the material to break up the clumped material and improve the fluffiness of the material. At the same time, drive the material to shuttle back and forth between the gap between the double-sided cavity and the grid-type drying mechanism (2) to achieve deep circulation dehydration of the material by multiple contact with the drying mechanism. S4. Medium-assisted enhanced drying and purification operation: During the above drying operation, external equipment is selectively connected through the internal medium channel (6) and flow micro-holes (7) of the second rotating shaft (401). Hot air and compressed air are introduced into the cavity through the micro-holes to enhance the heat exchange and drying of the material, purge and prevent blockage, or the negative pressure mode is turned on to actively suck up the leachate and water vapor generated by the drying of the material, quickly strip the free water inside the material, complete the efficient pre-treatment drying process of catering waste, and obtain finished material with uniform moisture content that is suitable for combustion in biomass combustion furnace.

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