CN210253135U

CN210253135U - Stale refuse sorting system

Info

Publication number: CN210253135U
Application number: CN201921274804.5U
Authority: CN
Inventors: 葛亚军; 刘明达; 曹占强; 戴小东; 左钟; 曹冬萌; 王莹; 付罕; 郭强
Original assignee: Beijing Capital Environment Technology Co Ltd
Current assignee: Beijing Capital Environment Technology Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-04-07
Anticipated expiration: 2029-08-07

Abstract

The utility model belongs to the technical field of stale refuse treatment, in particular to stale refuse sorting system, including plate conveyor, pick up the magnet separator that belt conveyor links to each other, pass through the drum sieve that the material loading belt conveyor links to each other with the magnet separator through artifical hand with plate conveyor, pass through the air separator that the belt conveyor links to each other and collect the baling press that the belt conveyor links to each other through selection by winnowing light material with the drum sieve. The utility model firstly adopts the uniform material distributor and the manual sorting platform to control the material to be uniform height and screen out massive stones, thereby facilitating the subsequent sorting; then the materials pass through a drum screen, a wind screen and a disc screen, harmful substances in the materials are removed, recyclable substances in the garbage are fully reserved and used for recycling in different fields, energy is saved, and the application field is wider.

Description

Stale refuse sorting system

Technical Field

The utility model belongs to the technical field of stale refuse treatment, specifically speaking relates to a stale refuse sorting system.

Background

With the development of the urbanization process, the quantity of garbage in large cities increases day by day, the storage capacity of garbage landfill sites cannot meet the actual requirement, and the redundant household garbage faces the embarrassment of ubiquitous landfill. In order to solve the problem, on one hand, the capacity of the refuse landfill needs to be expanded, and on the other hand, a novel treatment method for reducing and harmlessly treating the stale refuse of the refuse landfill needs to be explored to move the storage capacity of the refuse landfill, prolong the service life of the refuse landfill and explore ways for reducing and recycling the stale refuse of the refuse landfill to the greatest extent. The reduction, resource treatment and utilization of the garbage need to develop a proper stale garbage sorting system.

SUMMERY OF THE UTILITY MODEL

Aiming at various defects in the prior art, the utility model discloses a stale refuse sorting system is researched and designed in long-term practice.

In order to achieve the above object, the utility model provides a following technical scheme:

the stale refuse sorting system comprises a plate conveyor, a magnetic separator, a rotary screen, a winnowing machine and a packing machine, wherein the magnetic separator is connected with the plate conveyor through a manual hand picking belt conveyor, the rotary screen is connected with the magnetic separator through a rotary screen feeding belt conveyor, the winnowing machine is connected with the rotary screen through a rotary screen oversize material transferring belt conveyor, and the packing machine is connected with the winnowing machine through a winnowing light material collecting belt conveyor.

The bottom of the drum screen is provided with a drum screen undersize collecting belt conveyor, and one end of the drum screen undersize collecting belt conveyor, which is close to the magnetic separator, is connected with a drum screen undersize transferring belt conveyor.

Furthermore, the plate conveyor is supported by a plurality of first supporting legs, a storage hopper is arranged along the length direction of the plate conveyor, and the storage hopper is supported by a plurality of storage hopper supports; the middle of storage hopper is equipped with first conveyer belt, and first conveyer belt one end is equipped with first gear motor.

Further, a uniform distributor is arranged between the plate conveyor and the manual hand picking belt conveyor; the uniform distributor is internally provided with a lifting assembly controlled by a driving assembly, and a second speed reduction motor is arranged beside the driving assembly.

Furthermore, an upper cover plate is arranged along the length direction of the manual hand picking belt conveyor, and manual sorting platforms are arranged on two sides of the manual hand picking belt conveyor; the manual sorting platform is characterized in that one end of the manual sorting platform is provided with a staircase, and a large object chute is further arranged on the manual sorting platform.

Furthermore, a second conveying belt is arranged at the bottom of the upper cover plate, and a tensioning device is arranged at the front end of the second conveying belt; an upper carrier roller group is arranged in the second conveying belt, and a return belt carrier roller is arranged at the bottom of the second conveying belt; and a sweeper is arranged at one end of the manual hand picking belt conveyor close to the magnetic separator.

Furthermore, the magnetic separator comprises a stainless steel storage hopper arranged in the frame, an electromagnet is arranged at the top of the stainless steel storage hopper, and the electromagnet is arranged on a bearing seat; the bearing block is hung on a lifting lug at the top of the frame through an adjusting bolt group; and a transmission chain is arranged above one end of the bearing seat.

Further, the trommel is supported by a plurality of second legs; a fourth conveying belt is arranged in the drum screen, and two ends of the fourth conveying belt are supported by driving carrier rollers; a driving motor is arranged between the two driving carrier rollers, and the two driving carrier rollers and the driving motor are connected through a universal coupling; the bottom of the drum screen is provided with an undersize material chute and an oversize material discharge hopper, and the drum screen is also provided with an observation window; an observation platform is further arranged on one side of the drum screen and connected with the drum screen crawling ladder, and a safety guardrail is further arranged on the observation platform.

Further, the air separator comprises a first fan and a second fan which are both connected with an air box of the air separator, the top of the air box is provided with an air inlet and an air return pipe of the air separator, and two ends of the bottom of the air box are respectively provided with a light material outlet and a heavy material outlet; a net chain machine is also arranged in the air box, and the output end of the net chain machine is connected with a net chain; the light material discharge port is connected with the winnowing light material collecting belt conveyor, the heavy material discharge port is connected with the winnowing heavy material receiving belt conveyor, and the winnowing heavy material receiving belt conveyor is connected with the winnowing heavy material bidirectional discharging belt conveyor.

Further, the other end of the drum screen undersize transfer belt conveyor is connected with the disc screen; the disc screen comprises a disc screen, and a disc screen feeding port is formed in the top of the disc screen; the disc screen is characterized in that a chute is arranged at the bottom of the disc screen, and a disc screen discharge hole is formed in the bottom of the chute.

The utility model has the advantages that:

firstly, the material is controlled to be uniform in height by adopting the uniform distributor and the manual sorting platform, and large stones and wood are screened out, so that the subsequent sorting is facilitated, the damage of the large materials to equipment is avoided, and the service life of the subsequent equipment is prolonged; then the materials pass through a drum screen, a wind screen and a disc screen to remove harmful substances in the materials, and the materials with various categories such as small particle size, light substances, humus soil and the like can be subdivided, so that recyclable substances in garbage are fully reserved and used for recycling in different fields, energy is saved, and the application field is wider.

Drawings

FIG. 1 is a top view of the overall structure of the sorting system of the present invention;

FIG. 2 is a front view of the scraper conveyor and uniform distributor of the present invention;

FIG. 3 is a front view of the manual sorting platform of the present invention;

FIG. 4 is a left side view of the magnetic separator of the present invention;

fig. 5 is a front view of the trommel of the present invention;

fig. 6 is a front view of the air classifier of the present invention;

FIG. 7 is a front view of the structure of the device from the drum screen to the disc screen of the present invention;

fig. 8 is a top view of the baler of the present invention.

In the drawings: 1-plate conveyor, 2-uniform distributor, 3-manual sorting platform, 4-magnetic separator, 5-rotary screen, 6-winnowing machine, 7-tray sorting screen, 8-packer, 11-first supporting leg, 12-first speed reducing motor, 13-discharge hopper, 14-driving component, 15-lifting component, 16-second speed reducing motor, 17-storage hopper, 18-storage hopper bracket, 31-upper cover plate, 32-tension device, 33-return belt carrier roller, 34-large object chute, 35-upper carrier roller group, 36-cleaner, 41-adjusting bolt group, 42-bearing seat, 43-electromagnet, 44-lifting lug, 45-transmission chain, 46-stainless steel storage hopper, 47-frame, lifting lug, and the like, 51-driving carrier roller, 52-undersize material chute, 53-second supporting leg, 54-oversize material discharge hopper, 55-safety guardrail, 56-universal coupling, 57-driving motor, 58-observation window, 59-rotary screen ladder, 61-air separator feed inlet, 62-first fan, 63-second fan, 64-light material discharge outlet, 65-mesh chain machine, 66-air return pipe, 67-heavy material discharge outlet, 68-air separator bellows, 69-mesh chain, 71-belt conveyor discharge outlet, 72-belt conveyor sweeper, 73-disc screen feed inlet, 74-disc screen, 75-chute, 76-disc screen discharge outlet, 81-iron wire packing pulley frame, 82-hydraulic station, 83-shell, 84-automatic wire threading assembly, 85-a bag body pressing component, 86-a bag body guide slope, 87-a manual hand picking belt conveyor, 88-a drum screen feeding belt conveyor, 89-a drum screen undersize collecting belt conveyor, 90-a drum screen undersize transferring belt conveyor, 91-a drum screen oversize transferring belt conveyor, 92-a winnowing heavy material receiving belt conveyor, 93-a winnowing light material collecting belt conveyor, 94-a disc screen undersize collecting belt conveyor, 95-a disc screen undersize reversible discharging belt conveyor, 96-a disc screen oversize belt conveyor and 97-a winnowing heavy material bidirectional discharging belt conveyor.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following description is given with reference to the accompanying drawings of the present invention for clear and complete description of the technical solution of the present invention. Based on the embodiments in the present application, other similar embodiments obtained by persons of ordinary skill in the art without any creative effort shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for the purpose of illustrating the present invention and not for the purpose of limiting the same.

The present invention will be further described with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-8, the utility model discloses a stale waste sorting system, including slat conveyor 1, pick up the magnet separator 4 that belt conveyor 87 links to each other through artifical hand with slat conveyor 1, pass through the drum sieve 5 that drum sieve material loading belt conveyor 88 links to each other with magnet separator 4, transport the air separator 6 that belt conveyor 91 links to each other through the drum sieve oversize with drum sieve 5, and collect baling press 8 that belt conveyor 93 links to each other through selection by winnowing light material with air separator 6.

Referring to fig. 1 and 2, a uniform distributor 2 is further arranged between the plate conveyor 1 and the manual hand picking belt conveyor 87. The plate conveyor 1 is supported and inclined by a plurality of first support legs 11, and the height of one end of the plate conveyor, which is close to the uniform distributor 2, is the highest. The storage hopper 17 is arranged along the length direction of the plate conveyor 1, the storage hopper 17 is supported by a plurality of storage hopper supports 18, a first conveying belt is arranged in the middle of the storage hopper 17, and the first conveying belt is powered by a first speed reducing motor 12 and conveys stale garbage to the uniform distributor 2.

The uniform distributor 2 is internally provided with a lifting assembly 15 controlled by a driving assembly 14, wherein the driving assembly 14 is powered by a second speed reduction motor 16 to drive the lifting assembly 15 to move to a set position in the uniform distributor 2, so that the stale refuse from the uniform distributor 2 is in a set thickness.

Referring to fig. 1 and 3, the aged refuse passes through the uniform distributor 2 and enters the manual hand picking belt conveyor 87. The upper cover plate 31 is arranged along the length direction of the manual hand picking belt conveyor 87, so that stale garbage coming out of the uniform distributor 2 is prevented from overflowing out of the manual hand picking belt conveyor 87. The upper cover plate 31 is arranged discontinuously, and the manual sorting platforms 3 are arranged on two sides of the manual hand picking belt conveyor (87) at the middle interval. The bottom of the upper cover plate 31 is provided with a second conveying belt of the manual hand picking belt conveyor 87, and the front end of the second conveying belt is provided with a tensioning device 32 for controlling the tensioning force of the conveying belt. An upper supporting roller set 35 is arranged in the second conveying belt and is used for supporting the weight of the second conveying belt and the stale refuse material. A return belt idler 33 is also provided at the bottom of the second belt to support the weight of the lower portion of the second belt. A sweeper 36 is arranged at one end of the manual hand picking belt conveyor 87 close to the magnetic separator 4 and is used for sweeping the old garbage stuck on the front and back surfaces of the second conveying belt.

The escalator is arranged at one end of the manual sorting platform 3 on two sides of the manual hand picking belt conveyor 87, the upper part and the lower part of a worker are arranged on the escalator, a large object chute 34 is further arranged on the escalator, and the worker puts large objects such as large stones and large wood pieces which are selected out into the chute and sends the large objects to a specific place for processing the materials.

Referring to fig. 1 and 4, the magnetic separator 4 includes a stainless steel storage hopper 46 disposed in the frame 47, one end of a manual belt conveyor 87 is connected to the stainless steel storage hopper 46, the conveyed stale refuse falls into the stainless steel storage hopper 46, the lower end of the stainless steel storage hopper 46 is connected to a roller screen charging belt conveyor 88, and the stale refuse falling into the stainless steel storage hopper 46 directly falls onto a third conveyor belt of the roller screen charging belt conveyor 88.

An electromagnet 43 is arranged at the top of the stainless steel storage hopper 46 and is used for adsorbing the waste iron in the stale refuse. The electromagnet 43 is mounted on a bearing seat 42, and the bearing seat 42 is hung on a lifting lug 44 at the top of a frame 47 through an adjusting bolt group 41. A transmission chain 45 is arranged above one end of the bearing seat 42 and used for driving a belt sleeved on the electromagnet 43, so that the adsorbed scrap iron is conveyed to a specific place for processing the materials.

Referring to fig. 1 and 5, one end of the drum screen 5 close to the magnetic separator 4 is provided with a drum screen undersize transfer belt conveyor 90, and the drum screen undersize transfer belt conveyor 90 is connected with a drum screen undersize collection belt conveyor 89 arranged at the bottom of the drum screen 5. The drum screen underflow collecting belt conveyor 89 is used to collect the stale refuse particles having a particle size of less than 50mm screened by the drum screen 5. The bottom of the drum screen 5 is provided with a screen underflow chute 52, stale garbage particles with the particle size smaller than 50mm fall to a drum screen underflow collecting belt conveyor 89 through the screen underflow chute 52, are conveyed to a drum screen underflow transferring belt conveyor 90 through the drum screen underflow collecting belt conveyor 89, and are conveyed to the disc screen 7.

The trommel 5 is supported by a plurality of second legs 53 and is disposed at an incline with its lowest elevation adjacent one end of the trommel screen oversize transfer belt conveyor 91. The stale refuse screened by the magnetic separator 4 is conveyed into the drum screen 5, the drum screen rotates to overturn and roll the stale refuse on the screen surface, and the qualified materials (undersize materials) are discharged to the drum screen undersize material collecting belt conveyor 89 through the undersize material chute 52 at the bottom of the drum screen 5.

The drum screen 5 is internally provided with a fourth conveying belt, two ends of the fourth conveying belt are supported by the driving carrier rollers 51, a driving motor 57 is arranged between the two driving carrier rollers 51, the fourth conveying belt and the driving motor 57 are connected through a universal coupling 56, the universal coupling 56 transmits the rotation of the driving motor 57 to the driving carrier rollers 51, and then the fourth conveying belt is rotated. The non-qualified material (oversize material) left after being screened by the drum screen 5 is conveyed to the oversize material discharge hopper 54 through the fourth conveying belt, and then falls to the drum screen oversize material transfer belt conveyor 91.

An observation platform is further arranged on one side of the drum screen 5, and a worker can observe the operation condition of the drum screen through an observation window 58 on the drum screen by going up to the observation platform through a drum screen crawling ladder 59. A safety guardrail 55 is further arranged on the outer side of the observation platform to prevent the worker from falling carelessly.

Referring to fig. 1 and 6, the air classifier 6 includes a first fan 62 and a second fan 63, both the first fan 62 and the second fan 63 are connected to an air box 68 of the air classifier, and the air is introduced into the air box 68. The top of the end of the air box 68 close to the drum screen 5 is provided with a material inlet 61 of the air separator, and materials conveyed by the material transferring belt conveyor 91 on the drum screen enter the air separator 6 from the material inlet 61 of the air separator for crushing and screening. A light material outlet 64 and a heavy material outlet 67 are respectively arranged at two ends of the bottom of the air box 68, light RDF (Refuse Derived Fuel) falls onto the air separation light material collecting belt conveyor 93 through the light material outlet 64, and the rest material falls onto the air separation heavy material collecting belt conveyor 92 through the heavy material outlet 67.

The top of the wind box 68, which is far from the end of the inlet 61 of the air separator, is provided with a return air duct 66 for returning air, because the air separator 6 of the present embodiment is a blowing-sucking type air separator, the air circulates inside, and the return air duct 66 prevents dust in the garbage from being blown outside.

The wind box 68 is also provided with a net chain machine 65, the output end of the net chain machine 65 is connected with a net chain 69, and the net chain 69 is used for filtering air and blocking light objects on one side of the net chain.

Referring to fig. 1 and 8, the light RDF screened by the winnowing machine 6 is conveyed to a packaging machine by a winnowing light material collecting belt conveyor 93, compressed into a bale, and intensively conveyed to a thermal power plant for incineration power generation.

The baler 8 comprises hydraulic stations 82 and automatic threading assemblies 84 arranged at the left and right ends of the housing 83, the hydraulic stations 82 providing power to the baler 8, and the threading assemblies 84 for baling. A baling iron wire pulley frame 81 is arranged at the left end of the hydraulic station 82 and is used for threading baling iron wires.

The automatic wire feeding assembly 84 is also fixedly connected with a bag body pressing assembly 85, and the right side of the bag body pressing assembly is connected with a bag body guide slope 86, so that the packaged materials can conveniently slide to a manual collecting position and can be transported by loading.

The remaining materials screened by the winnowing machine 6 are conveyed to a winnowing heavy material bidirectional discharge belt conveyor 97 through a winnowing heavy material receiving belt conveyor 92, and then are loaded on a muck truck and conveyed away for centralized landfill.

Referring to fig. 1 and 7, after being screened by the drum screen 5, the stale refuse particles with the particle size of less than 50mm are conveyed to the disc screen 7 through the drum screen undersize transfer belt conveyor 90, and after being screened by the disc screen 7, the humus in the stale refuse particles fall onto the disc screen undersize collection belt conveyor 94 and are conveyed to the disc screen undersize reversible discharge belt conveyor 95, and then are loaded onto a muck truck to be conveyed away as green fertilizers for utilization. The particles left except the humus soil are conveyed to an air separation heavy material bidirectional discharge belt conveyor 97 through a disc screening screen oversize belt conveyor 96, and are converged with the heavy material which is screened by the air separation machine 6 and then the light RDF is removed, and the heavy material is loaded on a muck truck and conveyed away for centralized landfill.

The disc screen 7 comprises a disc screen 74, and a disc screen feed opening 73 is formed in the top of the disc screen 74. The under-sieve material of the drum sieve is transferred to the belt conveyor 90 to convey the stale garbage particles with the particle size less than 50mm to the discharge port 71 of the belt conveyor and fall into the feed port 73 of the disc sieve. A belt conveyor sweeper 72 is also arranged on the drum screen undersize transferring belt conveyor 90 at the belt conveyor discharge port 71 and is used for clearing the garbage particles adhered on the drum screen undersize transferring belt conveyor 90 and ensuring that the garbage particles all fall into the belt conveyor discharge port 71. A chute 75 is arranged at the bottom of the disc screen 74, and a disc screen discharge port 76 is arranged at the bottom of the chute 75.

Each shaft of the disc screen 74 is provided with a plurality of discs, gaps are formed among the discs, and humus particles are small and can fall to the chute 75 from the gaps and then fall from the discharge port 76 of the disc screen.

The utility model discloses a when old and useless rubbish sorting system used, at first with the loader with old and useless rubbish dress to the storage hopper 17 of plate conveyor 1 in, plate conveyor 1 sends the material to the manual hand and picks up belt conveyor 87. Before reaching the manual hand picking belt conveyor 87, the thickness of the material layer is adjusted to a preset size through the uniform distributor 2. When the materials pass through the manual hand picking belt conveyor 87, the workers on the manual sorting platform 3 can select large materials such as large stones and large wood. The garbage after manual sorting is subjected to iron scrap removal by a magnetic separator 4 and then enters a drum screen 5 for screening.

The garbage with the particle size smaller than 50mm can enter the disc screen 7 through the drum screen undersize collection belt conveyor 89 and the drum screen undersize transfer belt conveyor 90, when small-particle materials pass through the disc screen 7, humus soil falls onto the lower disc screen undersize collection belt conveyor 94 through gaps of the disc screen 7, the humus soil is sent to the disc screen undersize reversible discharge belt conveyor 95 and then sent to the muck truck, and the collected humus soil can be used as a greening fertilizer. Oversize (material other than humus) from the tray screen 7 is brought together with heavy material from which light RDF has been removed by another tray screen oversize belt conveyor 96.

Oversize materials which are not screened out in the drum screen 5 enter the winnowing machine 6 through the conveying drum screen oversize material transfer belt conveyor 91, the light RDF is blown to the winnowing light material collecting belt conveyor 93 by wind, and then the light RDF is compressed into a package block through a packaging machine and is intensively conveyed to a thermal power plant for incineration power generation. The heavy materials without RDF fall onto the winnowing heavy material receiving belt conveyor 92, and are loaded on a muck truck for centralized landfill through the winnowing heavy material bidirectional discharging belt conveyor 97, and harmful substances are removed, so that the environment cannot be polluted after the landfill.

The stale refuse sorting system of the utility model firstly adopts the uniform distributor and the manual sorting platform to control the material to be uniform height and screen out large stones and wood, thereby facilitating the subsequent sorting, avoiding the damage of the large materials to the equipment and prolonging the service life of the subsequent equipment; then the materials pass through a drum screen, a wind screen and a disc screen to remove harmful substances in the materials, and the materials with various categories such as small particle size, light substances, humus soil and the like can be subdivided, so that recyclable substances in garbage are fully reserved and used for recycling in different fields, energy is saved, and the application field is wider.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.

Claims

1. The stale refuse sorting system is characterized by comprising a plate conveyor (1), a magnetic separator (4) connected with the plate conveyor (1) through a manual hand picking belt conveyor (87), a rotary screen (5) connected with the magnetic separator (4) through a rotary screen feeding belt conveyor (88), a winnowing machine (6) connected with the rotary screen (5) through a rotary screen oversize material transferring belt conveyor (91), and a packing machine (8) connected with the winnowing machine (6) through a winnowing light material collecting belt conveyor (93);

the bottom of the drum screen (5) is provided with a drum screen undersize collecting belt conveyor (89), and one end of the drum screen undersize collecting belt conveyor (89) close to the magnetic separator (4) is connected with a drum screen undersize transferring belt conveyor (90).

2. A stale waste sorting system according to claim 1, wherein the slat conveyor (1) is supported by a plurality of first legs (11), a storage hopper (17) is provided along the length of the slat conveyor (1), and the storage hopper (17) is supported by a plurality of storage hopper supports (18); the middle of the storage hopper (17) is provided with a first conveying belt, and one end of the first conveying belt is provided with a first speed reduction motor (12).

3. The stale refuse sorting system according to claim 2, wherein a uniform distributor (2) is arranged between the plate conveyor (1) and the manual hand picking belt conveyor (87); the uniform distributor (2) is internally provided with a lifting assembly (15) controlled by a driving assembly (14), and a second speed reduction motor (16) is arranged beside the driving assembly (14).

4. The stale refuse sorting system according to claim 1, wherein an upper cover plate (31) is arranged along the length direction of the manual hand picking belt conveyor (87), and manual sorting platforms (3) are arranged on two sides of the manual hand picking belt conveyor (87); the manual sorting platform is characterized in that one end of the manual sorting platform (3) is provided with a staircase, and a large object chute (34) is further arranged on the manual sorting platform (3).

5. The stale refuse sorting system according to claim 4, wherein the bottom of the upper cover plate (31) is provided with a second conveyor belt, and the front end of the second conveyor belt is provided with a tensioning device (32); an upper carrier roller group (35) is arranged in the second conveying belt, and a return belt carrier roller (33) is arranged at the bottom of the second conveying belt; and a sweeper (36) is arranged at one end of the manual hand picking belt conveyor (87) close to the magnetic separator (4).

6. The stale refuse sorting system according to claim 1, wherein the magnetic separator (4) comprises a stainless steel storage hopper (46) arranged in a frame (47), an electromagnet (43) is arranged at the top of the stainless steel storage hopper (46), and the electromagnet (43) is arranged on a bearing seat (42); the bearing seat (42) is hung on a lifting lug (44) at the top of the frame (47) through an adjusting bolt group (41); and a transmission chain (45) is arranged above one end of the bearing seat (42).

7. A stale waste sorting system according to claim 1, wherein the trommel (5) is supported by a plurality of second legs (53); a fourth conveying belt is arranged in the drum screen (5), and two ends of the fourth conveying belt are supported by driving carrier rollers (51); a driving motor (57) is arranged between the two driving carrier rollers (51), and the two driving carrier rollers and the driving motor (57) are connected through a universal coupling (56); the bottom of the drum screen (5) is provided with a screen underflow chute (52) and a screen overflow discharge hopper (54), and the drum screen (5) is also provided with an observation window (58); an observation platform is further arranged on one side of the drum screen (5), the observation platform is connected with a drum screen ladder stand (59), and a safety guardrail (55) is further arranged on the observation platform.

8. The stale refuse sorting system according to claim 1, wherein the air separator (6) comprises a first fan (62) and a second fan (63) both connected to an air separator bellows (68), the top of the bellows (68) is provided with an air separator inlet (61) and an air return pipe (66), and the two ends of the bottom of the bellows (68) are respectively provided with a light material outlet (64) and a heavy material outlet (67); a net chain machine (65) is further arranged in the air box (68), and the output end of the net chain machine (65) is connected with a net chain (69); the light material discharge port (64) is connected with a winnowing light material collecting belt conveyor (93), the heavy material discharge port (67) is connected with a winnowing heavy material receiving belt conveyor (92), and the winnowing heavy material receiving belt conveyor (92) is connected with a winnowing heavy material bidirectional discharging belt conveyor (97).

9. The stale refuse sorting system according to claim 1, wherein the other end of the drum screen undersize transfer belt conveyor (90) is connected with the disc screen (7); the disc screen (7) comprises a disc screen (74), and a disc screen feeding hole (73) is formed in the top of the disc screen (74); the bottom of the disc screen (74) is provided with a chute (75), and the bottom of the chute (75) is provided with a disc screen discharge hole (76).