Garbage drying and incinerating device

Abstract

The application discloses a garbage drying and incineration device, which comprises an incineration furnace and a drying chamber, the drying chamber comprises a feeding port at the top, a discharging port at the bottom, an air inlet and an air outlet at the side, the air inlet is communicated to a flue gas pipeline, a material rack arranged below the feeding port comprises a central shaft and a pair of stand columns, a plurality of layer pushing and scraping assemblies are connected between the pair of stand columns, the pushing and scraping assembly comprises a shaft sleeve, a pushing plate and a scraping plate, the central shaft is rotatable in the shaft sleeve, a horizontal tray is arranged on the central shaft, the horizontal tray comprises a semicircular disc bottom and a semicircular ring-shaped fence, the lower side edge of the scraping plate is flush with the top of the fence, and the lower end of the pushing plate vertically extends to the disc bottom of the horizontal tray and horizontally extends to the inner wall of the fence. The device overcomes the problems of high drying energy consumption, insufficient drying degree of garbage and the like in the prior art when garbage is dried and incinerated, the flue gas of the incineration furnace is used for drying the garbage, the garbage falls layer by layer and is air dried, and thus the water content of the garbage can be effectively reduced and the garbage incineration effect can be improved.

Description

Technical Field

[0001] This invention relates to the field of waste incineration technology, and more particularly to a waste drying and incineration apparatus. Background Technology

[0002] Waste incineration is an important means of reducing and harmlessly disposing of waste, and it is currently the most practical choice for waste treatment in my country. In particular, waste-to-energy incineration projects can effectively utilize waste to generate considerable economic benefits.

[0003] The calorific value of waste is a major factor affecting the combustion efficiency of waste. Currently, the waste incinerated by waste-to-energy plants in my country is mainly municipal solid waste with high moisture content. The calorific value of untreated waste is often lower than that required for incineration power generation. Waste drying technology is an effective method to reduce moisture content and further increase calorific value. However, the waste drying and incineration technologies currently used still struggle to achieve the drying effect required for incineration. Chinese Patent Publication No. CN110513996A, published on November 29, 2019, entitled "A Waste Drying Device for Waste-to-Energy Plants," discloses a waste drying device, including a box with an inlet and outlet, and a stirring and cutting device installed in the box. It uses electric heating plates to heat and dry the waste, which can serve as a pre-treatment for waste drying before incineration. However, the waste drying device provided by this patent requires an additional heat source, resulting in high energy consumption. The moisture emitted by the waste easily accumulates in the box, affecting the degree of drying. Summary of the Invention

[0004] This invention overcomes the problems of high energy consumption and insufficient drying degree in the existing technology when drying and incinerating waste. It provides a waste drying and incineration device that uses the flue gas of the incinerator to dry the waste. By setting up multiple horizontal trays and cooperating with the pushing and scraping components, the waste is dried layer by layer, spread out and dried by air blowing. The waste is dried to meet the calorific value of normal incineration power generation while reducing the energy consumption of waste drying.

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

[0006] Waste drying and incineration equipment includes:

[0007] An incinerator includes a furnace opening, a furnace cavity, a slag outlet, and flue gas ducts;

[0008] The drying chamber includes a top inlet, a bottom outlet, and side air inlets and outlets. The air inlets are connected to the flue gas duct and equipped with a blower. The outlets are connected to the furnace opening. A material rack is provided below the inlet. The material rack includes a central shaft and a pair of columns. A multi-layer pusher assembly is connected between the pair of columns. Each pusher assembly includes a bushing and push plates and scrapers connected to its two sides. The push plates and scrapers of the upper and lower pusher assemblies are staggered. The central shaft is driven to rotate in the bushing by a power assembly. A horizontal tray fixed to the central shaft is provided below each pusher assembly. The horizontal tray includes a semi-circular bottom centered on the central shaft and a semi-circular annular enclosure on its arc-shaped edge. Two adjacent horizontal trays are located on opposite sides of the central shaft. The lower edge of the scraper is flush with the top of the enclosure. The lower end of the pusher extends vertically to the bottom of the horizontal tray and horizontally to the inner wall of the enclosure.

[0009] Preferably, the apparatus also includes a dry waste storage area, which includes an upper inlet and a lower outlet, the inlet being connected below the discharge port at the bottom of the drying chamber, and the outlet being connected above the furnace opening of the incinerator.

[0010] Preferably, the number of air inlets is the same as the number of horizontal trays, and the orientation of the air inlets corresponds one-to-one with the position of the horizontal trays.

[0011] Preferably, the bottom surface of the drying chamber is provided with a slope that slopes towards the discharge port.

[0012] Preferably, the power assembly includes a motor, the output of which drives the central shaft to rotate around its axis via a gear set.

[0013] Preferably, the system also includes a waste shredder, the waste outlet of which is connected above the feed inlet of the drying chamber.

[0014] Preferably, the air outlet is connected to a vacuum device for drawing gas from the drying chamber.

[0015] This application also provides a waste drying and incineration method, using the waste drying and incineration apparatus provided by any of the above schemes, the method comprising the following steps:

[0016] S1: Use the power unit to drive the central shaft to rotate so that the uppermost horizontal tray is below the feed inlet. The starting end of the horizontal tray in the rotation direction is below the scraper, and the ending end is below the push plate.

[0017] S2: Open the feed inlet to let the garbage fall into the top horizontal pallet, drive the central shaft to rotate half a turn, and each horizontal pallet passes under the scraper. The height of the garbage in the horizontal pallet is leveled to the height of the enclosure by the scraper.

[0018] S3: The blower at the air inlet blows the outside air and the high-temperature flue gas in the flue gas duct toward the horizontal tray to dry the garbage in it;

[0019] S4: After completing one round of waste drying, drive the central shaft to rotate half a turn. Each layer of horizontal pallets passes under the push plate. The waste in the upper layer of horizontal pallets is pushed into the lower layer of horizontal pallets by the push plate. The waste in the bottom layer of horizontal pallets falls to the bottom of the drying chamber and enters the furnace opening of the incinerator from the discharge port. Return to step S2 to continue execution.

[0020] The present invention includes at least the following beneficial effects: (1) The garbage falls layer by layer on the material rack and is dried by multiple air blowing processes, resulting in a high degree of dryness and high calorific value; (2) The garbage is turned over multiple times during the multiple falls, which can achieve uniform drying of each part of the garbage and improve the overall degree of dryness; (3) The high temperature flue gas of the incinerator is fully utilized as a heat source, which can improve the drying speed of the garbage and save energy; (4) The airflow between the air inlet and the air outlet can promptly remove the water vapor evaporated from the garbage, maintain the stable humidity in the drying chamber to meet the drying conditions of the garbage, and facilitate the continuous operation of the device; (5) A temporary storage area for dried garbage can be set up at the discharge port, and the temporarily stored dried garbage can be used for the rapid start-up of the garbage incinerator. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the material rack structure of the present invention;

[0023] Figure 3 This is a top view of the material rack structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the central shaft connection structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the column connection structure of the present invention.

[0026] In the diagram: 1. Furnace opening; 2. Flue gas duct; 3. Drying chamber; 31. Feed inlet; 32. Discharge outlet; 33. Air inlet; 34. Air outlet; 4. Material rack; 5. Central shaft; 6. Column; 7. Bushing; 8. Horizontal pallet; 9. Scraper; 10. Push plate; 11. Inclined ramp. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the materials described are commercially available unless otherwise specified. In the description of this invention, it should be noted that, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] like Figure 1-5 As shown, the waste drying and incineration apparatus provided by the present invention includes:

[0031] The incinerator includes a furnace opening 1, a furnace cavity, a slag outlet, and a flue gas duct 2. The incinerator is a conventional product that can be obtained through market channels. The main types of incinerators include mechanical grate furnaces, fluidized bed incinerators, pyrolysis incinerators, and rotary kiln incinerators. All of these types of incinerators can be used in the scheme of this application. Considering the incineration performance and economy, the mechanical grate furnace with mature and reliable technology is preferred.

[0032] The drying chamber 3 includes a top inlet 31, a bottom outlet 32, and side air inlets 33 and outlets 34. The air inlet 33 is connected to the flue gas duct 2 and is equipped with a blower. The outlet 32 ​​is connected to the furnace opening 1. A material rack 4 is provided below the inlet 31. The material rack 4 includes a central shaft 5 and a pair of columns 6. A multi-layer pusher / scraper assembly is connected between the pair of columns 6. Each pusher / scraper assembly includes a bushing 7 and push plates 10 and scrapers 9 connected to its two sides respectively. The push plates 10 and scrapers 9 of the upper and lower pusher / scraper assemblies are connected to each other. The plates 9 are staggered, and the central shaft 5 is driven by the power component to rotate in the bushing 7. Each layer of the scraping component is provided with a horizontal tray 8 fixed on the central shaft 5. The horizontal tray 8 includes a semi-circular bottom with the axis of the central shaft 5 as the center and a semi-circular ring barrier on its arc edge. Two adjacent horizontal trays 8 are located on both sides of the central shaft 5. The lower edge of the scraper 9 is flush with the top of the barrier. The lower end of the pusher 10 extends vertically to the bottom of the horizontal tray 8 and horizontally to the inner wall of the barrier.

[0033] The feed inlet 31 is funnel-shaped. The waste to be dried provided by the external feeding equipment enters the drying chamber 3 through the feed inlet 31. The waste falls into the uppermost horizontal tray 8 of the material rack 4. The lower end of the feed inlet 31 is positioned closer to the uppermost scraper 9 than the uppermost push plate, so that the scraper 9 can properly level the waste. The opening interval and single feeding amount of the feed inlet 31 can be adjusted by a valve. The discharge outlet 32 ​​is connected to the furnace opening 1 through a conveying pipe. After being dried in multiple layers, the waste falls to the bottom of the drying chamber 3 and accumulates in a small amount before falling into the discharge outlet 32. Most of the high-temperature flue gas in the flue gas duct 2 is used for turbine power generation, and a small portion enters the drying chamber 3 from the air inlet 33 to form hot air. The air inlet 33 may also optionally have an air inlet for external air to enter. The blower mixes the flue gas and air and blows it onto the horizontal tray 8 to dry the waste. The water vapor evaporated from the waste is discharged from the drying chamber 3 through the air outlet 34 in a timely manner. The humidity in the drying chamber 3 is maintained within a certain range without the problem of water vapor accumulation.

[0034] The lower ends of a pair of uprights 6 of the material rack 4 are fixed to the bottom of the drying chamber 3. The central shaft 5 is located in the middle of the pair of uprights 6. To facilitate the connection of the pusher and scraper assembly, the uprights 6 are preferably square column structures. The bushings 7 in the pusher and scraper assembly are divided into multiple segments of equal length and are all fitted on the central shaft 5. The two opposite sides of the outer surface of the bushings 7 are connected to the pusher plate 10 and the scraper 9, respectively. The length directions of the pusher plate 10 and the scraper 9 are consistent. The horizontal trays 8 on the central shaft 5 are spaced apart. The bottom side of the upper horizontal tray 8 is separated from the top side of the bottom of the lower horizontal tray 8 by a bushing 7. In actual installation and manufacturing, the central shaft 5 can be placed in the bushings 7 first, and then the horizontal trays 8 can be fixed to the central shaft 5 layer by layer by welding. The vertical projection of each layer of horizontal tray 8 is a semi-circle. The adjacent upper and lower layers of horizontal trays 8 are staggered to form a complete circle. When the waste in the upper layer of horizontal tray 8 is pushed, it falls into the lower layer of horizontal tray 8. The waste falls layer by layer until it reaches the bottom of the drying chamber 3. The scraper 9 is a long strip plate, with both ends connected to the bushing 7 and the column 6 respectively. The lower edge of the scraper 9 is flush with the top of the enclosure of the horizontal tray 8. When rotating relative to the horizontal tray 8, it scrapes the garbage in the horizontal tray 8 that is higher than the enclosure to improve the drying effect. The pusher 10 includes an upper part connected to the column 6 and the bushing 7 respectively, and a lower part that fits against the bottom of the horizontal tray 8 and the enclosure. When rotating relative to the horizontal tray 8, the pusher pushes all the garbage in the horizontal tray 8 to the next layer of horizontal tray 8. It should be noted that in the actual design, the rotation method involved in the material rack 4 is not limited to driving the central shaft 5 to rotate. It can also be driven by driving the column 6 to make a circular motion around the central shaft 5. If the column 6 is used to move, the column 6 is separated from the bottom of the drying chamber 3 and connected to the power component, and the central shaft 5 is fixed to the bottom of the drying chamber 3. It is only necessary to ensure that the horizontal tray 8 and the pusher component can achieve a controllable relative rotation angle. This change is obvious. Because the horizontal pallets 8 are staggered, and the push plates 10 and scrapers 9 are also staggered, the relative angles between each layer of horizontal pallet 8 and its corresponding push plate 10 and scraper 9 above it are consistent, thereby achieving the simultaneous scraping of the garbage in each layer of horizontal pallet 8 or the simultaneous pushing of the garbage in each layer of horizontal pallet 8 to the next layer.

[0035] When using the device for waste drying and incineration, waste is first added directly to the furnace opening 1 of the incinerator to start the incinerator. Alternatively, the waste can be preliminarily dried using external air in the drying chamber 3 before being added to the incinerator to accelerate the start-up of the incinerator. After the incinerator is started, the high-temperature flue gas in the flue gas duct 2 is used to dry the waste. During normal operation, the initial position of the horizontal pallet 8 is first adjusted. The power unit drives the central shaft 5 to rotate so that the uppermost horizontal pallet 8 is below the feed inlet 31. At this time, the starting end of the horizontal pallet 8 in the rotation direction is below the scraper 9, and the ending end is below the push plate 10. The initial position of the horizontal pallet 8 does not need to be adjusted every time because the device actually operates in a cycle of one full rotation of the horizontal pallet 8. Therefore, the horizontal pallet 8 will eventually return to its initial position, and no further adjustment is needed when starting the device next time. After the horizontal pallet 8 is in place, the feed inlet 31 is opened so that a certain amount of waste falls into the uppermost horizontal pallet 8. Before rotation, the waste on the horizontal pallet 8 is mainly concentrated near the starting end in the rotation direction. The power unit drives the central shaft 5 to rotate half a turn, and each layer of horizontal pallet 8 completely passes under its corresponding scraper 9. The waste in the horizontal pallet 8... The height is leveled to the enclosure height by scraper 9; the blower at air inlet 33 blows external air and high-temperature flue gas from flue gas duct 2 onto horizontal tray 8 to dry the waste there. During the waste drying process, moisture is carried away from drying chamber 3 through air outlet 34; after air is blown through air inlet 33 for a period of time, one cycle of waste drying is completed. At this time, the power component drives the central shaft 5 to rotate half a turn, and each layer of horizontal tray 8 passes completely under the corresponding push plate 10. The waste in the upper layer of horizontal tray 8 is pushed into the lower layer of horizontal tray 8 by push plate 10. The waste in the bottom layer of horizontal tray 8 falls to the bottom of drying chamber 3 and enters the furnace opening 1 of the incinerator through discharge port 32. The number of times the waste falls to the bottom of drying chamber 3 is dried is the number of layers of horizontal tray 8. The waste is constantly turned over during the process of falling layer by layer to ensure that the waste entering furnace opening 1 and the final moisture content and drying uniformity can meet the incineration standards. After completing one cycle, the valve of discharge port 32 is opened to replenish waste to the uppermost horizontal tray 8, and the horizontal trays continue to rotate and the waste continues to dry.

[0036] By using this waste drying and incineration device, the waste falls layer by layer on the material rack 4 and is dried layer by layer. After multiple drying processes, the waste has a high degree of dryness and high calorific value, resulting in good incineration effect. During the multiple falling process, the waste can be turned over multiple times, ensuring that all parts of the waste are dried evenly. Since the waste with low moisture content is not continuously dried in one area, the overall dryness of the waste is improved. The device makes full use of the flue gas from the incinerator as a heat source. The flue gas is a high-temperature gas, and its temperature remains high and contains little moisture after mixing with air, which can improve the drying speed of waste and save energy. The airflow between the air inlet 33 and the air outlet 34 can promptly remove the moisture evaporated from the waste, keeping the humidity in the drying chamber 3 stable and meeting the conditions for waste drying. The device is not prone to failure during continuous operation.

[0037] In another technical solution, such as Figure 1 As shown, the device also includes a dry waste storage area, which includes an upper inlet and a lower outlet. The inlet is connected below the discharge port 32 at the bottom of the drying chamber 3, and the outlet is connected above the furnace opening 1 of the incinerator. The connection between the dry waste buffer zone, the drying chamber 3, and the incinerator is controlled by valves. Under normal circumstances, the discharge port 32 of the drying chamber 3 is directly connected to the furnace opening 1 of the incinerator. The rate at which the drying chamber 3 dries waste is kept close to the rate at which the incinerator consumes waste. By improving the waste drying efficiency, a large amount of dry waste is generated, a portion of which is sent to the incinerator, and the remainder is sent to the dry waste storage area. The waste temporarily stored in the dry waste storage area can be directly added to the incinerator for incineration, and a portion is reserved as the initial waste to be fed when the incinerator is started next time. When the incinerator is started, there is a continuous combustion and temperature rise process until it stabilizes. The time taken for this process is greatly affected by the degree of dryness of the waste. Because this portion of waste is highly dry, it can significantly speed up the start-up speed of the incinerator.

[0038] In another technical solution, such as Figure 1 As shown, the number of air inlets 33 is the same as the number of horizontal trays 8, and the orientation of the air inlets 33 corresponds one-to-one with the position of the horizontal trays 8. By setting corresponding air inlets 33 for each layer of horizontal trays 8, precise air blowing and drying can be achieved. Since the moisture content of the garbage decreases layer by layer, the air volume of different layers can be adjusted by controlling the power of the blower to achieve a better drying effect.

[0039] The bottom surface of the drying chamber 3 is provided with a ramp 11 that slopes towards the discharge port 32. Under normal circumstances, the waste that falls to the bottom of the drying chamber 3 will naturally fall into the discharge port 32 after accumulating, or the discharge port 32 can be set under the material rack 4 so that the dried waste can directly enter the discharge port 32. By setting the ramp 11 that slopes towards the discharge port 32, the dried waste can be guided to the discharge port 32 to reduce the amount of accumulation.

[0040] The power unit includes a motor, whose output drives the central shaft 5 to rotate around its axis via a gear set. The motor can be a common stepper motor or a servo motor, facilitating control of the rotation speed and number of revolutions of the central shaft 5 and the horizontal tray 8. The gear set includes gears connected to the motor output shaft and the upper end of the central shaft 5, respectively. The gear connected to the motor output shaft has a smaller diameter than the gear on the upper end of the central shaft 5, and the two can mesh directly. Alternatively, a multi-stage gear meshing structure can be used for indirect transmission. Multiple rotations of the motor drive the central shaft 5 to rotate half a revolution, reducing the impact of motor speed control accuracy on the rotation accuracy of the central shaft 5.

[0041] In another technical solution, such as Figure 1 As shown, the device also includes a garbage shredder, the garbage outlet of which is connected above the feed inlet 31 of the drying chamber 3. The garbage shredder shreds the garbage before it enters the drying chamber 3 to make it more uniform in size and achieve a better drying effect.

[0042] The air outlet 34 is connected to a vacuum device for drawing gas from the drying chamber 3. The addition of a vacuum device to the air outlet 34 can actively draw air to increase the convection velocity in the drying chamber 3, thereby improving the drying rate of the waste. The vacuum device can also be connected to a gas filtration and purification structure to deodorize and remove dust from the gas discharged from the drying chamber 3.

[0043] This application also provides a waste drying and incineration method, using the waste drying and incineration apparatus provided by any of the above schemes, the method comprising the following steps:

[0044] S1: Drive the central shaft 5 to rotate using the power assembly so that the uppermost horizontal tray 8 is located below the feed inlet 31. The starting end of the horizontal tray 8 in the rotation direction is located below the scraper 9, and the ending end is located below the push plate 10.

[0045] S2: Open the feed port 31 to let the garbage fall into the top horizontal pallet 8, drive the central shaft 5 to rotate half a turn, and each horizontal pallet 8 passes under the scraper 9. The height of the garbage in the horizontal pallet 8 is leveled to the height of the enclosure by the scraper 9.

[0046] S3: The blower at the air inlet 33 blows the outside air and the high-temperature flue gas in the flue gas duct 2 toward the horizontal tray 8 to dry the garbage there;

[0047] S4: After completing one round of waste drying, drive the central shaft 5 to rotate half a turn. Each layer of horizontal pallets 8 passes under the push plate 10. The waste in the upper layer of horizontal pallets 8 is pushed into the lower layer of horizontal pallets 8 by the push plate 10. The waste in the bottommost horizontal pallet 8 falls to the bottom of the drying chamber 3 and enters the furnace opening 1 of the incinerator from the discharge port 32. Return to step S2 to continue execution.

[0048] By using the waste drying and incineration apparatus provided in this application, waste is dried and incinerated. The waste fed into the drying chamber 3 falls layer by layer on the material rack 4. During the drying process, the waste is turned over multiple times, which can achieve uniform drying of each part of the waste and improve the overall drying degree. The waste has a high calorific value and good combustion effect, which can improve the power generation efficiency of the waste incineration power plant. The high-temperature flue gas of the incinerator is fully utilized as the heat source for waste drying, which increases the waste drying speed while reducing additional energy consumption. The water vapor evaporated during the waste drying process is removed in time, and the apparatus can operate stably for a long time, which speeds up the waste processing speed and increases the amount of waste that can be incinerated per operation of a single unit in the power plant.

[0049] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A waste drying and incineration device, characterized in that, include: An incinerator includes a furnace opening, a furnace cavity, a slag outlet, and flue gas ducts; The drying chamber includes a top inlet, a bottom outlet, and side air inlets and outlets. The air inlets are connected to the flue gas duct and equipped with a blower. The outlets are connected to the furnace opening. A material rack is provided below the inlet. The material rack includes a central shaft and a pair of columns. A multi-layer pusher assembly is connected between the pair of columns. Each pusher assembly includes a bushing and push plates and scrapers connected to its two sides. The push plates and scrapers of the upper and lower pusher assemblies are staggered. The central shaft is driven to rotate in the bushing by a power assembly. A horizontal tray fixed to the central shaft is provided below each pusher assembly. The horizontal tray includes a semi-circular bottom centered on the central shaft and a semi-circular annular enclosure on its arc-shaped edge. Two adjacent horizontal trays are located on opposite sides of the central shaft. The lower edge of the scraper is flush with the top of the enclosure. The lower end of the pusher extends vertically to the bottom of the horizontal tray and horizontally to the inner wall of the enclosure.

2. The waste drying and incineration apparatus according to claim 1, characterized in that, It also includes a dry waste storage area, which has an upper inlet and a lower outlet, the inlet being connected below the discharge port at the bottom of the drying chamber, and the outlet being connected above the furnace opening of the incinerator.

3. The waste drying and incineration apparatus according to claim 1, characterized in that, The number of air inlets is the same as the number of horizontal trays, and the orientation of the air inlets corresponds one-to-one with the position of the horizontal trays.

4. The waste drying and incineration apparatus according to claim 1, characterized in that, The bottom surface of the drying chamber is provided with a slope that slopes towards the discharge port.

5. The waste drying and incineration apparatus according to claim 1, characterized in that, The power component includes a motor, and the output of the motor drives the central shaft to rotate around the axis via a gear set.

6. The waste drying and incineration apparatus according to claim 1, characterized in that, It also includes a waste shredder, the waste outlet of which is connected above the feed inlet of the drying chamber.

7. The waste drying and incineration apparatus according to claim 1, characterized in that, The air outlet is connected to a vacuum device for drawing gas from the drying chamber.

8. A method for drying and incinerating waste, characterized in that, The method using the waste drying and incineration apparatus as described in any one of claims 1-7 includes the following steps: S1: Use the power unit to drive the central shaft to rotate so that the uppermost horizontal tray is below the feed inlet. The starting end of the horizontal tray in the rotation direction is below the scraper, and the ending end is below the push plate. S2: Open the feed inlet to let the garbage fall into the top horizontal pallet, drive the central shaft to rotate half a turn, and each horizontal pallet passes under the scraper. The height of the garbage in the horizontal pallet is leveled to the height of the enclosure by the scraper. S3: The blower at the air inlet blows the outside air and the high-temperature flue gas in the flue gas duct toward the horizontal tray to dry the garbage in it; S4: After completing one round of waste drying, drive the central shaft to rotate half a turn. Each layer of horizontal pallets passes under the push plate. The waste in the upper layer of horizontal pallets is pushed into the lower layer of horizontal pallets by the push plate. The waste in the bottom layer of horizontal pallets falls to the bottom of the drying chamber and enters the furnace opening of the incinerator from the discharge port. Return to step S2 to continue execution.

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