Household garbage in-situ processing system

Abstract

The invention relates to the technical field of garbage processing, in particular to a household garbage in-situ processing system which comprises a feeding machine, and the discharging end of the feeding machine is connected with a feeding port of a shredding machine; a feeding port of the hot drying machine is connected with a discharging port of the shredding machine, a hot water pipe is arranged in the hot drying machine, and the hot drying machine is used for receiving the garbage conveyed by the shredding machine and drying the garbage; the water heater is connected with the hot water pipe; the sorting machine is used for treating the garbage subjected to heat drying, and the air distribution fan is matched with the heat drying machine to divide the garbage into light garbage and heavy garbage to be output; and the post-treatment mechanism is connected with the sorting machine and is used for carrying out compression molding treatment on the sorted garbage. According to the invention, an integrated processing technology of'in-situ crushing, heat drying, sorting and thermal plasticizing 'is adopted to realize on-site and timely processing and disposal of the household garbage of residents, and an integrated technical scheme of'hot air and hot water circulation condensation heat exchange' is adopted to realize resource recycling and pollution reduction.

Description

Technical Field

[0001] The invention relates to the technical field of garbage processing, and in particular to an in-situ processing system 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 in garbage bins to achieve source classification of garbage. Although this can achieve source classification and collection of garbage to a certain extent, due to the incomplete technology and settings of terminal classification and processing of garbage, the garbage sorted at the source is mixed into mixed garbage and transported to landfills or waste incineration plants, and the goal of garbage classification and resource utilization is not truly achieved. The existing garbage sorting and processing equipment has a complex processing process, high energy consumption, high cost and large area. Summary of the invention

[0003] One of the problems in the background art that the present invention is intended to solve.

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

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

[0006] A system for in-situ processing of domestic waste, comprising:

[0007] Feeder, and

[0008] A shredder, wherein the discharge end of the feeder is connected to the feed inlet of the shredder, and the shredder is used to tear the garbage bag;

[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, which is used to process the heat-dried garbage. The fan cooperates with the heat-drying machine to separate the garbage into light garbage and heavy garbage for output;

[0012] The post-processing mechanism is connected to the sorting machine and is used for performing compression molding on the sorted garbage.

[0013] Furthermore, the thermal dryer is connected to a heat exchange condenser, the air inlet of the heat exchange condenser is connected to the air outlet of the thermal dryer, the air outlet of the heat exchange condenser is connected to a blower, and the air outlet of the blower is connected to the thermal dryer and the sorting machine.

[0014] Furthermore, the circulating water inlet of the heat exchange condenser is connected to the circulating water outlet of the thermal dryer, the circulating water outlet of the heat exchange condenser is connected to a cache water tank, the outlet of the cache water tank is connected to a circulating water pump, the outlet of the circulating water pump is connected to a check valve, and the check valve is connected to the water inlet of the water heater.

[0015] Furthermore, a plurality of mesh belt conveyors are arranged in the thermal drying machine, the number of the hot water pipes is consistent with the number of the mesh belt conveyors, and the hot water pipes are arranged between the upper and lower mesh belts in the corresponding mesh belt conveyors.

[0016] Furthermore, a flipping mechanism is arranged above each mesh belt conveyor, and the flipping mechanism includes a through rod and a hanging nail. The through rod is arranged along the feeding direction of the mesh belt conveyor, and the hanging nail is rotatably connected to the through rod. When the mesh belt conveyor transports garbage, the hanging nail contacts with the garbage and rotates driven by the moving garbage.

[0017] Furthermore, scraper plates are fixed vertically and equidistantly on the outer surface of the mesh belt of the mesh belt conveyor. When the hanging nails and the scraper plates are in a vertical state, the projected height h of the scraper plates on the hanging nails accounts for 60-80% of the height H of the hanging nails.

[0018] Furthermore, among the adjacent mesh belt conveyors, the operating transmission speed of the mesh belt conveyor located in the upper layer is higher than the transmission operating speed of the mesh belt conveyor located in the lower layer.

[0019] Furthermore, the feeder adopts a chain conveyor, the chain conveyor is arranged in a Z shape, the two ends of the chain conveyor are arranged horizontally, the middle part of the chain conveyor is inclined toward the shredder, and the chain conveyor conveys the garbage toward the shredder in an inclined upward manner. Baffle plates are arranged at equal distances on the chain plates, and the motor that drives the chain plates to move adopts a stepping control motor, and the motor control strategy adopted is that the dwell time is 2-3 times the travel time of the baffle plate spacing.

[0020] Furthermore, the height of the material blocking plate should be greater than 50% of the average height of the garbage bag.

[0021] 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.

[0022] 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.

[0023] 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

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the in-situ processing system of residents' domestic waste in the present invention.

[0026] Figure 2 It is a structural schematic diagram of the feeder in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the shredder in the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the thermal drying machine in the present invention.

[0029] Figure 5 It is a structural schematic diagram of the positional relationship between the scraper plate and the hanging nails in the thermal drying machine of the present invention.

[0030] 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. Fabric fan; 20. Third product collection box; 21. Bottom plate; 22 , side panel; 23, top cover; 24, exhaust fan; 25, feeding door; 26, weighing sensor; 1-1, chain plate; 1-2, material blocking plate; 1-3, motor; 2-1, cylinder; 2-2, piston push rod; 2-3, movable plate; 2-4, fixed plate; 3-1, mesh belt conveyor; 3-2, hot water pipe; 3-3, heat conducting fins; 3-4, mesh belt; 3-5, scraper plate; 3-6, hanging nails; 3-7, through rod; 3-8, first discharge port; 3-9, second discharge port; 3-10, third discharge port; 3-11, receiving plate. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] A system for processing domestic waste in situ comprises a shell, and a feeder 1, a shredder 2, a thermal dryer 3, a blower 12, a heat exchange condenser 13, a water heater 15, a condensate collection box 14 and a post-processing mechanism integrated in the shell, the post-processing mechanism comprising a first material conveyor 4, a second material conveyor 8, a first forced feeder 5, a second forced feeder 9, a first thermoplasticizing machine, a second thermoplasticizing machine, 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 dryer 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 thermoplasticizing machine, and the second thermoplasticizing machine.

[0035] The shell includes a top cover 23, a bottom plate 21, and a side panel 22 connected between the top cover 23 and the bottom plate 21. The side panel 22 is provided with a feeding door 25, a material taking door and a central control cabinet operating door. The feeding door 25 is used to install the feeder 1.

[0036] The discharge end of the feeder 1 is connected to the feed port of the shredder 2, the discharge port of the shredder 2 is connected to the feed port of the heat dryer 3, the heat dryer 3 is provided with three discharge ports, the first discharge port 3-8 is connected to the feed port of the first material conveyor 4, the second discharge port 3-9 is connected to the feed port of the second material conveyor 8, and the discharge of the third discharge port 3-10 is provided with a third product collection box 20 through a transmission device 27 such as an auger. The discharge port of the first material conveyor 4 is connected to the feed port of the first forced feeder 5, the discharge port of the first forced feeder 5 is connected to the feed port of the first thermoplastic molding machine, the discharge port of the first thermoplastic molding machine is connected to the feed port of the first product collection box 7; the discharge port of the second material conveyor 8 is connected to the feed port of the second forced feeder 9, the discharge port of the second forced feeder 9 is connected to the feed port of the second thermoplastic molding machine, the discharge port of the second thermoplastic molding machine is connected to the feed port of the second product collection box 11.

[0037] Among them, 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 connection between the blower 12 and the thermal dryer 3 is located between the bottom mesh belt 3-4 of the thermal dryer 3.

[0038] The thermal dryer 3 is connected to a hot water pipe 3-2 for heating the air in the thermal dryer 3 to dry the moisture in the garbage. The hot water inlet of the hot water pipe 3-2 is connected to the water outlet of the water heater 15. The water vapor generated during the drying process of the garbage in the thermal dryer is discharged to the heat exchange condenser 13 along with the hot air in the thermal dryer 3. The heat exchange condenser 13 condenses the water vapor in the hot air into condensed water. The condensed water outlet of the heat exchange condenser 13 is connected to a condensed water collecting box 14. The heat exchange condenser 13 transmits the dehydrated air to the blower 12.

[0039] During the thermal drying process, the hot water pipe 3-2 heats the air in the thermal dryer 3, so that the moisture in the garbage sublimates into water vapor and is discharged to the heat exchange condenser 13 with the hot air. The heat exchange condenser 13 separates the humid hot air into condensed water and dry hot air. The dry hot air returns to the thermal dryer 3 through the blower 12 and is output to the air distribution fan 19 for use, and the condensed water is output for storage. The circulating water inlet of the heat exchange condenser 13 is connected to the circulating water outlet of the thermal dryer 3, and the circulating water outlet of the heat exchange condenser 13 is connected to a buffer water tank 18, and the outlet of the buffer water tank 18 is connected to a circulating water pump, and the outlet of the circulating water pump is connected to a check valve 16, and the check valve 16 is connected to the water inlet of the water heater 15. The circulating water in the hot dryer is input into the water heater 15 for heating, and then input into the hot water pipe 3-2 to heat the hot dryer.

[0040] During the air separation process, the heated dry air separates the garbage into light garbage and heavy garbage, and performs secondary drying on the garbage to convert the residual moisture in the garbage into water vapor. The air containing water vapor is returned to the air source heat pump through the air outlet of the air distribution fan 19 for reuse.

[0041] In the present application, the hot water generated by the water heater 15 first heats the water pipe 3-2, and then heats the air outside the pipe. The air outside the pipe heats the garbage and takes away the moisture in the garbage to form high-temperature humid air. The method of heating the air by the hot water pipe 3-2 can quickly make the air in the hot dryer achieve a uniform temperature increase. Since the air temperature in the hot dryer is uniform, the generation of condensed water can be effectively controlled, and the secondary wetting of the garbage by the generation of condensed water can be effectively reduced, thereby improving the efficiency of garbage drying.

[0042] After leaving the thermal dryer 3, the high-temperature humid air directly enters the air source heat pump. In the air source heat pump, the humid air is first condensed and dehumidified to release heat, and low-temperature dry air and condensed water are obtained. Then, the waste heat is recovered and the dry air is heated again. The heated dry air is blown into the cloth fan 19 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. 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 the water vapor removed from the garbage recovered by the air source heat pump on the other hand. The condensation heat of the condensed water is fully utilized to achieve full utilization of energy, and the condensation heat in the water removed from the garbage is recycled and utilized, while avoiding the escape of odor during the thermal drying of the garbage. In addition, a ventilator is provided on the upper part of the side panel 22 of the shell, and a ventilator is installed in the ventilator. When there is no garbage processing, the shell is ventilated by the ventilator to avoid the growth of bacteria.

[0043] It should be noted that a weighing sensor 26 is provided on the horizontal panel of the feeding door 25 of the shell, which has both induction switch and weighing functions. The feeder 1 adopts a chain plate 1-1 conveyor, which is arranged in a Z shape, and the two ends of the chain plate 1-1 conveyor are arranged horizontally, and the middle part of the chain plate 1-1 conveyor is arranged tilted toward the shredder 2, and the chain plate 1-1 conveyor conveys the garbage in an inclined upward manner toward the shredder 2. Baffle plates 1-2 are arranged at equal distances on the chain plate 1-1, and the height of the baffle plates 1-2 should be greater than 50% of the average height of the garbage bag, and is set to 100mm-300mm to prevent the garbage bag from sliding on the chain plate 1-1; and the spacing between the first baffle plates 1-2 on the chain plate 1-1 should be greater than or equal to the average width of the garbage bag, so as to prevent the garbage bag from being stuck on the chain plate 1-1 conveyor. The spacing between adjacent baffle plates 1-2 should be greater than or equal to the average width of the garbage bag, and is set to 300mm-600mm. The motor 1-3 driving the chain plate 1-1 to move adopts a step-by-step control motor 1-3, and the control strategy of the motor 1-3 adopted is that the dwell time is 2-3 times the spacing travel time of the baffle plate 1-2.

[0044] When feeding garbage to the inlet of the feeder 1, the amount of garbage fed and the time interval of feeding are often random, and it is easy to feed a large amount of garbage in a short period of time. If the unevenly fed garbage is directly transported to the shredder 2, the shredder 2 will be fed with a large amount of garbage in a short period of time, which may lead to insufficient shredding, garbage accumulation and blockage, and overload of the shredder 2. Therefore, the motor 1-3 control strategy is adopted to achieve uniform material transmission, avoid the subsequent equipment overload caused by the uncertainty of the garbage feeding time interval and the change of the feeding amount, and even the problems of material instability, discontinuity, and other problems such as material accumulation and blockage, and gap intervals that affect the normal operation of the equipment.

[0045] The shredder 2 adopts a double-stick tooth bite shredder 2, which includes two rollers rolling in opposite directions. The blades on the rollers are 5-20mm wide, the grooves are 30-50mm deep, and the distance between adjacent blade tips on the circumference is 100-150mm, ensuring that bottle-shaped garbage such as plastic bottles and glass bottles are bitten into and shredded, and the particle length of the shredded material is less than 200mm and the width is less than 20mm. The motor 1-3 driving the shredder 2 is provided with an overload protector, and when overloaded, the motor 1-3 automatically stops for protection.

[0046] The heat drying machine 3 is composed of a multi-layer mesh belt conveyor 3-1 and a multi-layer hot water pipe 3-2 alternately combined. The multi-layer mesh belt conveyor 3-1 is arranged in the vertical direction, and the adjacent mesh belt conveyors 3-1 are staggered in the horizontal direction. One layer of mesh belt conveyor 3-1 corresponds to one hot water pipe 3-2, and the hot water pipe 3-2 on the same layer is located between the upper and lower mesh belts 3-4 inside the mesh belt conveyor 3-1. Each layer of hot water pipe 3-2 is composed of multiple metal pipes of the same specification, and the mesh single aperture and opening area of ​​the mesh belt conveyor 3-1 should meet the requirements of air permeability and no leakage. The single aperture is designed to be 3-5mm, and the opening rate is designed to be 40%-60%. The minimum adjacent surface distance between adjacent metal pipes should meet the requirements of air permeability and heat exchange area, and is designed to be 5mm-10mm.

[0047] A plurality of passive material turning mechanisms are arranged at equal distances on the upper surface of each layer of mesh belt conveyor 3-1. The material turning mechanism is composed of a penetration rod 3-7, a rotating drum and a material hanging nail 3-6. The two ends of the penetration rod 3-7 are fixed on the end plate, the rotating drum is sleeved on the penetration rod 3-7, and the material hanging nail 3-6 is welded on the rotating drum evenly along the circumference. The lower end of the material hanging nail 3-6 is in contact with the upper surface of the mesh belt conveyor 3-1; a scraper plate 3-5 and a material hanging nail 3-6 are fixed vertically at equal distances on the outer surface of the mesh belt 3-4 of the mesh belt conveyor 3-1. When the scraper plate 3-5 and the scraper plate 3-5 are both in a vertical state, the projected height h of the scraper plate 3-5 on the hanging nail 3-6 accounts for 60-80% of the height H of the hanging nail 3-6. In this application, the top of the scraper plate 3-5 is 10mm-20mm lower than the height of the hanging nail 3-6 to ensure that the scraper plate 3-5 passes horizontally from under the material turning mechanism. The height of the hanging nail 3-6 should be sufficient to allow the top tip to be inserted between 1 / 3 and 2 / 3 of the garbage material layer, and does not hinder the normal operation of the adjacent mesh belt conveyor 3-1. The hanging nail 3-6 and the scraper plate 3-5 form a rake tooth shape, which is convenient for raking the garbage material layer on the mesh belt 3-4, which is beneficial to increase the air permeability of the garbage material layer, reduce the resistance of hot air, and reduce the energy consumption of the fan.

[0048] It should be noted that each layer of mesh belt conveyor 3-1 is respectively equipped with an independent motor frequency converter, which is convenient for independent speed regulation of each layer of mesh belt conveyor 3-1 and differential operation of the mesh belt 3-4 between layers; the present invention is designed that the operation speed of the mesh belt conveyor 3-1 of the upper layer is higher than the operation speed of the mesh belt conveyor 3-1 of the adjacent lower layer, so that it is convenient to achieve uniform thickness of the garbage material layer between layers. Except for the conveyor on the lowest layer, the rotation direction of other mesh belt conveyors 3-1 is opposite to that of the adjacent mesh belt conveyors 3-1, and the transmission direction of the mesh belt conveyor 3-1 on the lowest layer is the same as that of the adjacent mesh belt conveyors 3-1.

[0049] The cloth fan 19 uses a bouncing screening machine, which is set between the upper and lower mesh belts 3-4 of the bottom mesh belt conveyor 3-1 to control the vibration of the mesh belt 3-4. No material turning mechanism is set above the bottom mesh belt 3-4; the cross-sectional area of ​​a single mesh of the mesh belt 3-4 is 25-400mm 2 The opening area of ​​the screen surface is greater than 60%, and the installation inclination angle of the screen surface can be 10-30 degrees to ensure the sorting effect.

[0050] The three discharge ports of the thermal dryer 3 are arranged at the bottom of the thermal dryer 3, wherein a through opening is arranged between the first discharge port 3-8 and the second discharge port 3-9, a receiving plate 3-11 is arranged at the through opening, and the third discharge port 3-10 is arranged on the receiving plate 3-11. The garbage is transported layer by layer toward the bottom of the hot dryer 3. When the garbage is transported to the mesh belt conveyor 3-1 at the bottom layer, the light garbage floats up under the action of the cloth fan 19, and is driven to move toward the first discharge port 3-8 under the action of the scraper on the mesh belt 3-4 at the lower side of the penultimate mesh belt conveyor 3-1; the non-hookable garbage continues to move along the upper surface of the mesh belt 3-4 at the bottom layer, and falls into the feed port of the 2# material conveyor 8 by its own weight at the second discharge port 3-9 at the end of the mesh belt conveyor 3-1 at the bottom layer; the remaining heavy fine particles of garbage pass through the mesh holes of the mesh belt 3-4 at the bottom layer, pass through the cloth fan 19 downward, fall onto the bottom plate, and are horizontally scraped away by the baffle plate 3-5 on the mesh belt 3-4 at the bottom layer, and discharged from the third discharge port 3-10. The separation of heavy garbage, light garbage, hookable garbage and non-hookable garbage is achieved.

[0051] In addition, a heat-conducting fin 3-3 is arranged outside the hot water pipe, and the surface area of ​​the heat-conducting fin 3-3 is 3-5 times the surface area of ​​the hot water pipe 3-2.

[0052] The first plasticizing and molding machine 6 and the second plasticizing and molding machine 10 both adopt low-pressure screw hot-melt plasticizing machines, and the pitches of the screws on the first plasticizing and molding machine 6 and the second plasticizing and molding machine 10 are both set to three equal-length sections, and the pitch ratios of the front 1 / 3, the middle 1 / 3 and the rear 1 / 3 are 1:0.3~0.7:0.1~0.3.

[0053] The implementation principle of this application is:

[0054] First, preheat the equipment. Through the automatic control program setting, 15-30 minutes before the specified garbage delivery 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.

[0055] 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.

[0056] When the weighing sensor 26 senses the garbage thrown in by residents, the feeding door 25 opens, and the feeder 1 is automatically turned on synchronously. According to the set program, each time a baffle plate 1-2 spacing is traveled, it stays for 2-3 times the travel time 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 fabric blower 19, the heat dryer 3, and the shredder 2 are turned on synchronously in sequence, so that the equipment system starts and operates in reverse order. The garbage bag first enters the shredder 2 through the conveyor to complete the bag breaking and garbage shredding.

[0057] The shredded garbage falls onto the first mesh belt 3-4 of the thermal dryer 3 by its own weight, and moves horizontally with the mesh belt 3-4. When the garbage passes through the hanging nails 3-6 in the turning mechanism, the garbage is turned over to improve the heat exchange effect. When the distance of the single-layer mesh belt 3-4 is completed, the garbage automatically falls into the next layer of mesh belt 3-4, repeating the transmission process of the first layer of mesh belt 3-4, until it finally falls into the cloth fan 19 to complete the garbage transmission process. While the garbage is walking on the mesh belt 3-4, it is heated by the hot air passing from bottom to top. The hot air inlet temperature is set to 80℃-85℃, the hot air outlet temperature is set to 90℃-95℃, the garbage outlet temperature after drying is set to 80℃-85℃, and the garbage drying time is 30min-45min. 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 drying garbage 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 directly sublimates into a gaseous state, forming steam and being discharged from the dryer with the hot air; the high-temperature humid air enters the air source heat pump after leaving the hot dryer 3. In the air source heat pump, the humid 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 and the dry air is heated. The heated dry air is blown into the air blower 19 through the blower 12, first participates in the sorting and secondary drying and dehydration of the garbage, and then enters the hot dryer 3 for recycling.

[0058] 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 17, enters the check valve 16 from the outlet of the circulating water pump 17, and enters the water heater 15 through the check valve 16 to complete the hot water circulation.

[0059] When the garbage falls onto the mesh belt 3-4 of the lowest mesh belt conveyor 3-1 in the thermal dryer, the wind force from the air distributor 19 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 scraper plate 3-5 on the upper mesh belt 3-4, moves forward in the horizontal direction and falls into the first discharge port 3-8 by its own weight, and falls into the feed port of the 1# material conveyor 4 from the first discharge port 3-8 by its own weight; the non-hookable garbage that is not hooked by the hanging nails 3-6 continues to move forward along the upper surface of the lowest mesh belt 3-4, and falls into the feed port of the 2# material conveyor 8 by its own weight at the second discharge port 3-9 at the end of the lowest mesh belt conveyor 3-1; the remaining heavy fine particle garbage passes through the mesh holes of the lowest mesh belt 3-4, passes downward through the air distributor 19, falls onto the bottom plate, is horizontally scraped away by the baffle plate 3-5 on the lowest mesh belt 3-4, and is discharged from the third discharge port 3-10.

[0060] The light garbage and heavy garbage obtained after sorting are then forced to feed into the first plasticizing and molding machine 6 and the second plasticizing and molding machine 10 for plasticizing and molding respectively, completing the hot plasticizing and molding of the garbage, and finally realizing the in-situ processing and productization of the garbage.

[0061] Some time after the specified garbage disposal time ends, the equipment system will shut down in sequence according to the order of material flow and wait to be started again when the next garbage disposal is required.

[0062] 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.

[0063] 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 3-4 operating rake teeth of the mesh belt 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.

[0064] 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.

[0065] 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 system for in-situ processing of domestic waste, characterized in that: include, a feeder (1), and A shredder (2), wherein the discharge end of the feeder (1) is connected to the feed inlet of the shredder (2), and the shredder (2) is used to tear up garbage bags; A heat drying machine (3), wherein the feed port of the heat drying machine (3) is connected to the feed 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 transported 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 cloth fan (19), the cloth fan (19) is used to process the heat-dried garbage, and the cloth fan (19) cooperates with the heat dryer (3) to separate the garbage into light garbage and heavy garbage for output; A post-processing mechanism is connected to the air distribution fan (19) and is used for performing compression molding on the sorted garbage.

2. The domestic waste in-situ processing system according to claim 1 is characterized in that: The thermal drying machine (3) is connected to a heat exchange condenser (13), the air inlet of the heat exchange condenser (13) is connected to the air outlet of the thermal drying machine (3), the air outlet of the heat exchange condenser (13) is connected to a blower (12), and the air outlet of the blower (12) is connected to the thermal drying machine (3) and a distribution fan (19).

3. The domestic waste in-situ processing system according to claim 2 is characterized in that: The circulating water inlet of the heat exchange condenser (13) is connected to the circulating water outlet of the thermal dryer (3); the circulating water outlet of the heat exchange condenser (13) is connected to a buffer water tank (18); the outlet of the buffer water tank (18) is connected to a circulating water pump; the outlet of the circulating water pump is connected to a check valve (16); and the check valve (16) is connected to the water inlet of the water heater (15).

4. The domestic waste in-situ processing system according to claim 1 is characterized in that: A plurality of mesh belt conveyors (3-1) are arranged in the thermal drying machine (3), the number of the hot water pipes (3-2) is consistent with the number of the mesh belt conveyors (3-1), and the hot water pipes (3-2) are arranged between the upper and lower mesh belts (3-4) in the corresponding mesh belt conveyors (3-1).

5. The domestic waste in-situ processing system according to claim 4 is characterized in that: A turnover mechanism is arranged above each mesh belt conveyor (3-1), and the turnover mechanism comprises a penetration rod (3-7) and a material hanging nail (3-6). The penetration rod (3-7) is arranged along the feeding direction of the mesh belt conveyor (3-1), and the material hanging nail (3-6) is rotatably connected to the penetration rod (3-7). When the mesh belt conveyor (3-1) is conveying garbage, the material hanging nail (3-6) contacts the garbage and rotates under the drive of the moving garbage.

6. The domestic waste in-situ processing system according to claim 5, characterized in that: Scraper plates are fixedly connected vertically and equidistantly to the outer surface of the mesh belt (3-4) of the mesh belt conveyor (3-1); when the hanging nail (3-6) and the scraper plates are both in a vertical state, the projected height h of the scraper plates on the hanging nail (3-6) accounts for 60 to 80% of the height H of the hanging nail (3-6).

7. The domestic waste in-situ processing system according to claim 4 is characterized in that: Among the adjacent mesh belt conveyors (3-1), the operating transmission speed of the mesh belt conveyor (3-1) located in the upper layer is higher than the transmission operating speed of the mesh belt conveyor (3-1) located in the lower layer.

8. The domestic waste in-situ processing system according to claim 1, characterized in that: The feeder (1) adopts a chain plate (1-1) conveyor, the chain plate (1-1) conveyor is arranged in a Z shape, the two ends of the chain plate (1-1) conveyor are arranged horizontally, the middle part of the chain plate (1-1) conveyor is arranged inclined toward the shredder (2), and the chain plate (1-1) conveyor conveys the garbage toward the shredder (2) in an inclined upward manner. The chain plate (1-1) is provided with baffle plates (1-2) at equal distances, and the motor (1-3) driving the chain plate (1-1) to move adopts a step-by-step control motor (1-3), and the motor (1-3) control strategy adopted is that the dwell time is 2-3 times the travel time of the baffle plate (1-2) interval.

9. The domestic waste in-situ processing system according to claim 8, characterized in that: The height of the baffle plate (1-2) should be greater than 50% of the average height of the garbage bag.

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