Domestic garbage in-situ processing method

Abstract

The invention relates to the technical field of garbage processing, in particular to an in-situ processing method for household garbage, which comprises the following steps: breaking a garbage bag, and shredding the garbage; the shredded garbage and the garbage bag are dried through a heat drying machine, air in drying equipment is heated in the drying process, moisture in the garbage is vaporized, and high-saturation steam is formed and output; the dried garbage is divided into light garbage and heavy garbage through a sorting machine; carrying out thermoplastic molding on the light garbage and the heavy garbage; and high-saturation water vapor discharged in the drying process is recycled, condensate water and dry air in the high-saturation water vapor are separated out, and the dried garbage is subjected to winnowing through the separated dry air. The integrated technical scheme of hot air and hot water circulation condensation heat exchange is adopted, and odor is prevented from escaping; secondary steam generated by garbage heat drying exchanges heat with circulating water in the condenser and then is discharged in the form of condensate water, waste heat recovery and condensate water recovery are achieved, and water pollution to the environment and energy waste are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of garbage processing, in particular to an in-situ processing method for domestic garbage. Background Art

[0002] my country advocates the principles of waste reduction, resource utilization and harmless disposal. Source reduction, source classification, process classification and transportation, and terminal classification and processing are the inevitable choices for waste disposal. At present, my country's residents generally use the mode of classified disposal of domestic waste in garbage bins to achieve source classification of waste. Although this can achieve source classification and collection of waste to a certain extent, due to the incomplete technology and settings of terminal classification and processing of waste, a large amount of waste gas and waste liquid will be discharged during the waste treatment process, causing environmental pollution. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing garbage disposal method causes serious environmental pollution.

[0004] To this end, the present invention provides a method for in-situ processing of domestic waste.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A method for in-situ processing of domestic waste comprises the following steps:

[0007] Step 1: Start the domestic waste in-situ processing system, the domestic waste in-situ processing system includes a feeder and

[0008] Used to tear garbage bag shredder, the discharge end of the feeder is connected to the feed inlet of the shredder

[0009] A heat dryer, wherein the feed port of the heat dryer is connected to the discharge port of the shredder, the heat dryer is provided with an air inlet and an air outlet, a hot water pipe is provided inside the heat dryer, and the heat dryer is used to receive the garbage conveyed by the shredder and dry it;

[0010] A water heater connected to a hot water pipe;

[0011] A sorting machine, the sorting machine is used to process the heat-dried garbage;

[0012] A post-processing mechanism, which is connected to the sorting machine and is used to perform compression molding on the sorted garbage;

[0013] Step 2: Break the garbage bag and tear the garbage into pieces;

[0014] Step 3: Dry the shredded garbage and garbage bags through a thermal dryer. During the drying process, the air in the drying equipment is heated to vaporize the water in the garbage and form highly saturated water vapor output;

[0015] Step 4: Use a sorting machine to winnow the dried garbage to separate it into light garbage and heavy garbage;

[0016] Step 5, thermoforming the light waste and the heavy waste respectively through a post-processing mechanism;

[0017] Among them, the highly saturated water vapor discharged during the drying process is recovered, the condensed water and dry air in the highly saturated water vapor are separated, and the separated dry air is used to air-select the dried garbage.

[0018] Furthermore, in step two, the feeder conveys garbage toward the shredder in a step-by-step manner, and baffles are evenly and equidistantly arranged on the transmission line in the feeder. When a baffle reaches the feed end of the transmission line, the transmission of the transmission line is interrupted, and the stagnation time is 2-3 times the time from the previous baffle leaving the feed end of the transmission line to the baffle reaching the feed end of the transmission line.

[0019] Furthermore, in step three, during the process of drying the garbage, a hot water pipe is used to heat the air in the drying equipment, and the condensation heat generated by the separated condensed water from the highly saturated water vapor is used to auxiliary heat the air in the drying equipment.

[0020] Furthermore, in step three, hot air is input into the thermal dryer from the top of the thermal dryer.

[0021] Furthermore, in step three, the hot air outlet temperature of the thermal drying is higher than the hot air inlet temperature of the thermal drying machine.

[0022] Further, the hot air inlet temperature is set to 80°C-85°C, and the hot air outlet temperature is set to 90°C-95°C.

[0023] Furthermore, in the step three, a multi-layer mesh transmission line is provided in the heat dryer, and blades that can rotate with the garbage transmission are provided on the transmission line. During the transmission of the garbage in the heat dryer, the garbage is turned over, and the classification output of the garbage is achieved through the cooperation of the mesh transmission line and the blades. The garbage classification output is heavy garbage, light garbage and hookable garbage.

[0024] Furthermore, the plurality of mesh transmission lines are independently controlled, and among the adjacent mesh transmission lines, the operating transmission speed of the mesh transmission lines located in an upper layer is higher than the transmission operating speed of the mesh transmission lines located in a lower layer.

[0025] Furthermore, in step four, the hot air outputted from the hot dryer in step three is condensed, the separated dry air is used for heating, and the dried garbage is air-selected using the heated dry air.

[0026] Furthermore, the condensed water produced in step 4 is heated by a water heater and input into a hot water pipe in the thermal drying machine.

[0027] The beneficial effect of the present invention is that the application adopts the integrated processing technology of "in-situ crushing + thermal drying + sorting + thermal plasticization" to process domestic waste into renewable plastics and high-energy waste-derived fuels on site, realize on-site and timely processing and disposal of residents' domestic waste, and integrate the reduction of garbage volume and amount, source deodorization and source resource utilization, effectively reduce the cost of garbage collection and transportation and pollution along the way, and effectively increase the added value of garbage.

[0028] The integrated technical solution of "hot air and hot water circulation condensation heat exchange" is adopted. On the one hand, the hot drying air and sorting air are circulated in a closed manner in the system to prevent odor from escaping, reducing the investment in deodorization equipment and deodorization costs; on the other hand, the secondary steam generated by the thermal drying of garbage is discharged in the form of condensed water after heat exchange with the circulating water in the condenser, realizing waste heat recovery and condensed water recovery, avoiding water pollution of the environment and energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 It is a structural schematic diagram of the in-situ processing system of residents' domestic waste in the present invention.

[0031] Figure 2 It is a schematic flow chart of the in-situ processing method of domestic waste in the present invention.

[0032] Figure 3 It is a relationship diagram between the temperature at the outlet of the thermal dryer and the drying speed in the present invention.

[0033] In the figure: 1. feeder; 2. shredder; 3. heat dryer; 4. first material conveyor; 5. first forced feeder; 6. first plasticizing and molding machine; 7. first product collection box; 8. second material conveyor; 9. second forced feeder; 10. second plasticizing and molding machine; 11. second product collection box; 12. blower; 13. heat exchange condenser; 14. condensate collection box; 15. water heater; 16. check valve; 17. circulation pump; 18. buffer water tank; 19. air distribution fan; 20. third product collection box; 1-1. transmission line; 1-2. baffle; 3-1. mesh transmission line; 3-2. hot water pipe; 3-4. blade. DETAILED DESCRIPTION

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] A system for processing domestic waste in situ comprises a feeder 1, a shredder 2, a thermal drying machine 3, a blower 12, a heat exchange condenser 13, a water heater 15, a condensate collection box 14 and a post-processing mechanism, wherein the post-processing mechanism comprises a first material conveyor 4, a second material conveyor 8, a first forced feeder 5, a second forced feeder 9, a first plasticizing and molding machine 6, a second plasticizing and molding machine 10, a first product collection box 7, and a second product collection box 11. A central control cabinet is connected to the shell, and the central control cabinet is electrically connected to the feeder 1, the shredder 2, the thermal drying machine 3, the blower 12, the heat exchange condenser 13, the water heater 15, the condensate collection box 14, the first material conveyor 4, the second material conveyor 8, the first forced feeder 5, the second forced feeder 9, the first plasticizing and molding machine 6, and the second plasticizing and molding machine 10.

[0038] A transmission line 1-1 is arranged in the feeder 1, and a plurality of baffles 1-2 are arranged on the transmission line 1-1 at equal intervals. The unloading end of the transmission line 1-1 of the feeder 1 is connected to the shredder 2 for conveying the garbage toward the shredder 2. The shredder 2 is used for crushing the garbage. The shredder 2 is connected to the thermal dryer 3. The shredded garbage falls into the thermal dryer 3 for drying. The thermal dryer 3 is connected to the first material conveyor 4 and the second material conveyor 8. The first material conveyor 4 is connected to the first plasticizing and molding machine 6 through the first forced feeder 5, and the dried garbage is input into the first plasticizing and molding machine 6 for plasticization and discharge to the first product collection box 7. The second material conveyor 8 is connected to the second plasticizing and molding machine 10 through the second forced feeder 9, and the dried garbage is input into the second plasticizing and molding machine 10 for plasticization and discharge to the second product collection box 11.

[0039] It should be noted that the water heater 15 and the heat exchange condenser 13 are connected to the thermal dryer 3, the air inlet of the blower 12 is connected to the air outlet of the thermal dryer 3 through the heat exchange condenser 13, the air outlet of the blower 12 is connected to the thermal dryer 3 through the air distribution fan 19, and the blower 12 is arranged at the outlet of the thermal dryer 3 to select the dried garbage into light garbage and heavy garbage and input them into the first material conveyor 4 and the second material conveyor 8 respectively.

[0040] A method for in-situ processing of domestic waste comprises the following steps:

[0041] Step 1: Preheat the device.

[0042] Through the automatic control program setting, 15-30 minutes before the specified garbage disposal time, the electric heating devices of the first plasticizing and molding machine 6, the second plasticizing and molding machine 10 and the water heater 15 are automatically turned on, so that the hot plasticizing machine and the hot drying machine 3 reach the temperature set by the control program in advance.

[0043] Among them, the temperature range of the first plasticizing molding machine 6 is 160℃-220℃; the temperature range of the second plasticizing molding machine 10 is 180℃-240℃; the temperature range of the heat drying machine 3 is 65℃-85℃. By appropriately increasing the plasticizing temperature, the plasticized garbage can be plasticized quickly, and paper garbage, clothes and other garbage that cannot be plasticized can be wrapped in the garbage.

[0044] Step 2: The garbage bags are transported and shredded.

[0045] When the weighing sensor senses the garbage thrown in by residents, the feeding door opens and the feeder 1 is automatically started simultaneously. When conveying garbage, when a baffle 1-2 reaches the unloading end of the transmission line 1-1, the transmission of the transmission line 1-1 is interrupted. The stagnation time is 2-3 times the time t from the previous baffle 1-2 leaving the unloading end of the transmission line 1-1 to the baffle 1-2 reaching the unloading end of the transmission line 1-1. Since the garbage is intermittently moved during drying, that is, "stop and go", in order to prevent the material from piling up at the front end, the garbage conveying process adopts an intermittent feeding method, and a certain stagnation time is also set for garbage conveying. The feeding frequency is coordinated with the subsequent garbage drying process, so as to achieve uniform material transmission and avoid subsequent equipment blockage. After the feeder 1 is turned on, the first plasticizing and molding machine 6, the second plasticizing and molding machine 10, the first forced feeder 5, the second forced feeder 9, the first material conveyor 4, the second material conveyor 8, the air source heat pump, the blower 12, the sorter, the heat drying machine 3, and the shredder 2 are turned on in sequence, so that the equipment system starts to operate in reverse order. The garbage bags first enter the shredder 2 through the conveyor to complete the bag breaking and garbage shredding.

[0046] Step three: shred the garbage and dry it thermally.

[0047] The shredded garbage is turned over while being transported toward the outlet (the first material conveyor, the second material conveyor) in the thermal dryer 3, thereby improving the heat exchange effect; while the garbage is being transported toward the outlet, hot air is transported to the thermal dryer 3, and the hot air passes through the thermal dryer 3 from bottom to top.

[0048] Through basic experiments, taking into account the drying time and energy consumption factors, the temperature in the hot dryer 3 needs to be maintained at 90-95°C. To this end, with the hot air outlet temperature of 90-95°C as the boundary condition, the garbage drying system and waste heat recovery system were tested in a self-designed small simulator. After many tests, the following conclusions were obtained: when the hot water temperature is set to 95-98°C, the circulating water is cooled to 80-85°C after the hot water-cold air heat exchange in the drying bin, and the high-temperature and high-humidity hot air at the outlet of the drying bin can reach 90-95°C, and the low-temperature and low-humidity hot air temperature after passing through the condensing dehumidification heat exchanger is 80-85°C. The hot air inlet temperature of the thermal dryer 3 is set to 80℃-85℃, the hot air outlet temperature is set to 90℃-95℃, the outlet temperature of the dried garbage is set to 80℃-85℃, the garbage drying time is 30min-45min, and the higher the hot air outlet temperature, the greater the air humidity at the outlet, and the more moisture the hot air takes away when it is discharged, which is beneficial to the garbage drying process. The heat source for garbage drying mainly comes from hot air. The heat for heating the air comes from the water heater 15 on the one hand, and from the condensation heat of water vapor removed from the garbage recovered by the air source heat pump on the other hand. Among them, the hot water generated by the water heater 15 first heats the water pipe 3-2, and then heats the air outside the water pipe 3-2. The air outside the water pipe heats the garbage and takes away the moisture in the garbage to form high-temperature humid air. Compared with the wind heat method, the method of heating the air with hot water in the water pipe can more quickly and evenly increase the temperature in the dryer, so that the moisture in the garbage is directly sublimated into a gaseous state, forming steam and discharged from the dryer with the hot air; the high-temperature humid air enters the air source heat pump after leaving the thermal dryer 3. In the air source heat pump, the wet air is first condensed and dehumidified to release heat to obtain low-temperature dry air and condensed water, and then the waste heat is recovered to heat the dry air. The heated dry air is blown into the sorting machine through the blower 12, first participates in the sorting and secondary drying and dehydration of the garbage, and then enters the thermal dryer 3 for recycling.

[0049] In step three, a multi-layer mesh transmission line 3-1 is provided in the heat dryer 3, a hot water pipe 3-2 is provided between the transmission belts in the mesh transmission line 3-1, and a blade 3-4 which can rotate with the garbage transmission is provided on the transmission line 1-1. During the transmission of the garbage in the heat dryer 3, the garbage is turned over, and the classification output of the garbage is realized through the cooperation of the mesh transmission line 3-1 and the blade 3-4. The classified garbage output is heavy garbage, light garbage and hookable garbage, which are discharged separately.

[0050] The heat source for drying garbage in the thermal dryer 3 mainly comes from the hot air passing through the garbage layer from bottom to top. The heat of the hot air comes from the electrically heated water of the water heater 15 on the one hand, and from the condensation heat of the water vapor recovered from the garbage by the heat exchange condenser 13 on the other hand. Among them, the hot water generated in the water heater 15 flows in the hot water pipe 3-2 and exchanges heat with the circulating air outside the pipe to generate high-temperature wind. The high-temperature wind passes through the garbage layer and directly exchanges heat with the garbage, taking away the moisture in the garbage and turning into high-temperature and high-humidity wind; after leaving the thermal dryer 3, the high-temperature and high-humidity wind directly enters the outside of the tube of the heat exchange condenser 13 to exchange heat between the hot water in the tube, and the temperature of the heat output of the high-temperature and high-humidity wind is reduced, so that part of the water vapor therein condenses into condensed water, and the condensed water flows into the condensed water collection box 14 for temporary storage; the high-temperature and high-humidity wind is cooled and releases heat to become low-temperature and low-humidity wind, which comes out from the lower part of the heat exchange condenser 13 and enters the blower 12. The blower 12 blows the low-temperature and low-humidity wind into the thermal dryer 3, re-participates in the sorting and drying and dehydration of the garbage, and completes the circulation heat exchange of the hot air between the thermal dryer 3 and the heat exchange condenser 13, finally realizing the hot air drying and dehydration of the garbage and the recovery of the condensation heat of water vapor, while avoiding the escape of odor during the thermal drying of the garbage. The circulating water after heat exchange comes out from the bottom of the thermal dryer 3 and enters from the lower part of the heat exchange condenser 13. In the heat exchange condenser 13, it exchanges heat with the circulating air through the wall, takes away the heat of the circulating air, and becomes high-temperature circulating water. It comes out from the upper part of the heat exchange condenser 13, enters the buffer water tank 18 from the top, and then flows out from the lower outlet of the buffer water tank 18, enters the circulating water pump, enters the check valve 16 from the outlet of the circulating water pump, and enters the water heater 15 through the check valve 16 to complete the hot water circulation.

[0051] Step 4: Dry garbage sorting and transportation.

[0052] When the dried garbage approaches the outlet of the thermal dryer 3, the wind force from the blower 12 separates the light and heavy garbage vertically, and the light garbage floats upward. At the same time, the floating light garbage is affected by the horizontal hooking force of the upper mesh belt blades 3-4 and moves forward in the horizontal direction; when the hookable garbage moves out of the wind force range of the blower 12, the light garbage hooked on the blades 3-4 falls into the first discharge port by its own weight; the non-hookable garbage that is not hooked by the hanging nails continues to move along the upper surface of the bottom mesh belt, and falls into the feed port of the second material conveyor 8 by its own weight at the second discharge port at the end of the bottom mesh belt conveyor; the remaining heavy and fine particle garbage passes through the mesh holes of the bottom mesh belt, passes downward through the air distributor, falls onto the bottom plate, is horizontally scraped away by the baffle plate on the bottom mesh belt, and is discharged from the third discharge port.

[0053] Step five: sort the garbage and perform thermoplastic molding.

[0054] The light garbage and heavy garbage obtained after sorting are forced to feeder and enter the first plasticizing and molding machine 6 and the second plasticizing and molding machine 10 for plasticizing and molding respectively. The plasticizing temperature of light garbage in the first plasticizing and molding machine 6 is 160℃-220℃, and the plasticizing time is 0.5min-1.5min; the plasticizing temperature of heavy garbage in the second plasticizing and molding machine 10 is 180℃-240℃, and the plasticizing time is 1.0min-5.0min; the hot plasticizing and molding processing of garbage is completed, and finally the in-situ processing and productization of garbage is realized.

[0055] Step 6: Shutdown. 30 minutes after the specified garbage delivery time, the equipment system will shut down in the order of material flow and wait for the next garbage delivery to start.

[0056] To summarize, this application adopts the integrated processing technology of "in-situ crushing + thermal drying + sorting + thermal plasticization" to process domestic waste into renewable plastics and high-energy waste-derived fuels on site, realize on-site and timely processing and disposal of residents' domestic waste, and integrate the reduction of volume and amount of garbage at the source, source deodorization and source resource utilization, effectively reduce the cost of garbage collection and transportation and pollution along the way, and effectively increase the added value of garbage.

[0057] In the process of garbage disposal, the technical solution of "coupling and integration of hot air drying system and sorting system" is adopted, and the wind power and the hooking force of the mesh belt rake teeth are used to realize the online separation and transportation of hookable garbage and non-hookable garbage, eliminating traditional garbage sorting equipment and reducing investment and land occupation.

[0058] The integrated technical solution of "hot air and hot water circulation condensation heat exchange" is adopted. On the one hand, the hot drying air and sorting air are circulated in a closed manner in the system to prevent odor from escaping, reducing the investment in deodorization equipment and deodorization costs; on the other hand, the secondary steam generated by the thermal drying of garbage is discharged in the form of condensed water after heat exchange with the circulating water in the condenser, realizing waste heat recovery and condensed water recovery, avoiding water pollution of the environment and energy waste.

[0059] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for in-situ processing of domestic waste, characterized in that: The following steps are included: Step 1: start the domestic waste in-situ processing system, the domestic waste in-situ processing system comprising a feeder (1), and A shredder (2) for tearing garbage bags, wherein the discharge end of the feeder (1) and the feed port of the shredder (2) are connected to a heat drying machine (3), the feed port of the heat drying machine (3) is connected to the discharge port of the shredder (2), the heat drying machine (3) is provided with an air inlet and an air outlet, a hot water pipe (3-2) is provided inside the heat drying machine (3), and the heat drying machine (3) is used to receive the garbage conveyed by the shredder (2) and dry it; A water heater (15), wherein the water heater (15) is connected to the hot water pipe (3-2); A sorting machine, the sorting machine is used to process the heat-dried garbage; A post-processing mechanism, which is connected to the sorting machine and is used to perform compression molding on the sorted garbage; Step 2: Break the garbage bag and tear the garbage into pieces; Step 3: Drying the shredded garbage and garbage bags by a thermal dryer (3). During the drying process, the air in the drying equipment is heated to vaporize the water in the garbage, thereby forming highly saturated water vapor output; Step 4: Use a sorting machine to winnow the dried garbage to separate it into light garbage and heavy garbage; Step 5, thermoplastically molding the light waste and the heavy waste respectively through a post-processing mechanism; Among them, the highly saturated water vapor discharged during the drying process is recovered, the condensed water and dry air in the highly saturated water vapor are separated, and the separated dry air is used to air-select the dried garbage.

2. The method for in-situ processing of domestic waste according to claim 1, characterized in that: In step 2, the feeder (1) conveys garbage toward the shredder (2) in a step-by-step manner, and baffles (1-2) are evenly and equidistantly arranged on the transmission line (1-1) in the feeder (1). When a baffle (1-2) reaches the unloading end of the transmission line (1-1), the transmission of the transmission line (1-1) is interrupted, and the stagnation time is 2-3 times the time from the last baffle (1-2) leaving the unloading end of the transmission line (1-1) to the baffle (1-2) reaching the unloading end of the transmission line (1-1).

3. The method for in-situ processing of domestic waste according to claim 1, characterized in that: In step three, during the process of drying the garbage, the hot water pipe (3-2) is used to heat the air in the drying equipment, and the condensation heat generated by the separated condensed water from the highly saturated water vapor is used to auxiliary heat the air in the drying equipment.

4. The method for in-situ processing of domestic waste according to claim 3, characterized in that: In step three, hot air is input into the thermal dryer (3) from the top of the thermal dryer (3).

5. The method for in-situ processing of domestic waste according to claim 4, characterized in that: In step three, the outlet temperature of the hot air of the thermal drying is higher than the inlet temperature of the hot air of the thermal drying machine (3).

6. The method for in-situ processing of domestic waste according to claim 5, characterized in that: The hot air inlet temperature is set at 80℃-85℃, and the hot air outlet temperature is set at 90℃-95℃.

7. The method for in-situ processing of domestic waste according to claim 2, characterized in that: In step three, a multi-layer mesh transmission line (3-1) is arranged in the heat dryer (3), and blades (3-4) that can rotate with the garbage transmission are arranged on the transmission line (1-1). During the process of the garbage being transmitted in the heat dryer (3), the garbage is turned over, and the mesh transmission line (3-1) and the blades (3-4) cooperate to achieve classified output of the garbage, and the classified output of the garbage is heavy garbage, light garbage and hookable garbage.

8. The method for in-situ processing of domestic waste according to claim 7, characterized in that: The plurality of mesh transmission lines (3-1) are independently controlled, and among adjacent mesh transmission lines (3-1), the operating transmission speed of the mesh transmission line (3-1) located in the upper layer is higher than the transmission operating speed of the mesh transmission line (3-1) located in the lower layer.

9. The method for in-situ processing of domestic waste according to claim 1, characterized in that: In step 4, the hot air outputted from the hot dryer in step 3 is condensed, the separated dry air is used for heating, and the dried garbage is air-selected using the heated dry air.

10. The method for in-situ processing of domestic waste according to claim 9, characterized in that: The condensed water produced in step 4 is heated by a water heater (15) and input into a hot water pipe (3-2) in the thermal drying machine (3).

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