CN110899119A - Stock garbage screening device and method - Google Patents

Stock garbage screening device and method Download PDF

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Publication number
CN110899119A
CN110899119A CN201911252183.5A CN201911252183A CN110899119A CN 110899119 A CN110899119 A CN 110899119A CN 201911252183 A CN201911252183 A CN 201911252183A CN 110899119 A CN110899119 A CN 110899119A
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China
Prior art keywords
garbage
screening
discharging
machine
feeding
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CN201911252183.5A
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Chinese (zh)
Inventor
王洋
齐长青
杨庆彬
罗彬�
倪哲
陈雨
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Beijing Geoenviron Engineering and Technology Inc
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Beijing Geoenviron Engineering and Technology Inc
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Priority to CN201911252183.5A priority Critical patent/CN110899119A/en
Publication of CN110899119A publication Critical patent/CN110899119A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/30Combinations with other devices, not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00Operations not covered by a single other subclass or by a single other group in this subclass

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a device and a method for screening stored garbage, wherein a primary sorting module comprises a screening machine and a first magnetic separator; the screening machine is provided with a first feeding hole, a first discharging hole and a first discharging hole, the first discharging hole is used for discharging undersize materials, and the first discharging hole is used for discharging oversize materials; the first magnetic separator is connected with the first discharge hole and used for separating metals in undersize materials; the secondary sorting module comprises a winnowing machine, a second magnetic separator and a packaging machine; the winnowing machine is provided with a second feeding hole, a second discharging hole and a second discharging hole, the second feeding hole is connected with the first discharging hole, the second discharging hole is used for discharging light materials, and the second discharging hole is used for discharging heavy aggregate; the second magnetic separator is connected with the second discharge port and used for separating metal in the heavy aggregate; the baling press is connected in the second discharge gate for the light thing of baling press. The scheme has the advantages of simple flow, less equipment investment and small occupied area, and can quickly and effectively separate heavy aggregates, light substances, humus and metals in the garbage.

Description

Stock garbage screening device and method
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a device and a method for screening stored garbage.
Background
The refuse landfill is used as a receiving place of urban solid wastes, the problem of the urban solid wastes going out is effectively solved, important contribution is made to the rapid development of cities, the urban area is gradually increased along with the acceleration of the development process of the cities and the increase of population, and a plurality of refuse landfills originally located in suburbs of the cities are located at the edges of the cities and even at the centers of the cities. The existence of the refuse landfill not only causes great pollution to the surrounding environment, but also causes serious troubles to the production and the living of surrounding residents, and the existence of the landfill greatly reduces the original site value, so that a large number of refuse landfills face the problem of moving, but some stock refuse landfills which are not used for many years need to be screened and treated due to long stacking time and certain difficulty in moving.
The garbage screening treatment at the present stage adopts a multi-stage fine screening process, so that the problems of complex flow, high equipment investment, overlarge occupied site area and the like exist, heavy aggregates, light matters, humus soil and metals in the stored garbage can not be separated quickly and effectively, and the defects of frequent equipment blockage and frequent shutdown and maintenance are caused when the stored garbage with higher water content is screened because no measures for reducing the water content of the garbage are adopted. In addition, the screened light materials are not packed, so that the light garbage is scattered around under the outdoor condition, and the surrounding environment is influenced.
Therefore, the present invention is expected to provide a storage garbage screening device and method which have simple process flow and can rapidly and effectively separate heavy aggregates, light matters, humus and metals in the storage garbage, and improve the screening efficiency.
Disclosure of Invention
The invention aims to provide a device and a method for screening stored garbage, which can reduce the influence of the movement of a garbage landfill on the surrounding environment, avoid equipment blockage, improve the screening efficiency and quickly and effectively separate heavy aggregates, light objects, humus and metals in the stored garbage.
In order to achieve the above object, the present invention provides a device for screening garbage stocks, comprising a primary sorting module and a secondary sorting module:
the primary sorting module comprises a screening machine and a first magnetic separator;
the screening machine is provided with a first feeding hole, a first discharging hole and a first discharging hole, the first discharging hole is used for discharging undersize materials, and the first discharging hole is used for discharging oversize materials;
the first magnetic separator is connected with the first discharge hole and used for separating metal in the undersize products;
the secondary sorting module comprises a winnowing machine, a second magnetic separator and a packaging machine;
the winnowing machine is provided with a second feeding hole, a second discharging hole and a second discharging hole, the second feeding hole is connected to the first discharging hole, the second discharging hole is used for discharging light materials, and the second discharging hole is used for discharging heavy aggregate;
the second magnetic separator is connected to the second discharge port and used for separating metal in the heavy aggregate;
the packer is connected to the second discharge port and used for packing the light objects.
Preferably, the material distribution device further comprises a feeding module, wherein the feeding module comprises a first feeding belt, a uniform material distributor and a second feeding belt;
a third feeding hole and a third discharging hole are formed in the uniform material distributor;
one end of the first feeding belt is a storage garbage feeding end, and the other end of the first feeding belt is connected to the third feeding port;
one end of the second feeding belt is connected to the third discharge hole, and the other end of the second feeding belt is connected to the first feed hole;
the first material loading belt is used for conveying the stored garbage into the uniform distribution machine, the stored garbage is uniformly distributed on the second material loading belt after passing through the uniform distribution machine, and the second material loading belt transports the stored garbage into the screening machine.
Preferably, the feeding module further comprises a manual sorting platform, and the manual sorting platform is arranged on two sides of the second feeding belt.
Preferably, the screening machine is a drum screen, the installation angle of the drum screen is 4-6 degrees, the rotating speed is 4-12 rpm, and the diameter of the screen is 15-80 mm.
More preferably, a bag breaking knife is arranged on the inner wall of the drum screen.
More preferably, discharge conveying belts are respectively arranged at the discharge outlets of the first magnetic separator and the second magnetic separator.
More preferably, still include belt conveyor, belt conveyor set up in the screening machine with between the first magnet separator, the screening machine with between the air separator, the air separator with between the second magnet separator and the air separator with between the baling press.
More preferably, the baler is a hydraulic baler.
More preferably, the air volume of the air separator is 24000m3/h~30000m3/h。
The invention also provides a method for screening the stored garbage, which utilizes the screening device and comprises the following steps:
1) digging out and inputting the stored garbage into a screening machine;
2) starting a screening machine, and screening the garbage stored in the screening machine;
3) discharging the undersize products of the sieving machine into a first magnetic separator, removing iron metals in the undersize products, and then carrying out outward treatment;
4) inputting oversize materials of the screening machine into a winnowing machine, and screening the oversize materials of the screening machine by using the winnowing machine;
5) conveying the light objects screened by the winnowing machine into a packaging machine for packaging, and then carrying out outward treatment;
6) and discharging the heavy aggregate screened by the air separator into a second magnetic separator, removing iron metals in the heavy aggregate, and then transporting the heavy aggregate outwards.
Preferably, the step 1) includes:
1.1) excavating the stored garbage;
1.2) airing the dug-out stored garbage;
1.3) conveying the aired stored garbage to a first feeding belt;
1.4) the first material loading belt sends the stored garbage into the uniform material distributor;
and 1.5) uniformly distributing the stored garbage on a second material loading belt by the uniform material distributor, and conveying the stored garbage to the screening machine by the second material loading belt.
Preferably, the step 1.2) further comprises:
and (4) overturning the aired stored garbage regularly, and separating out the materials with the particle size of more than 500 mm.
Preferably, the step 1.5) further comprises:
and separating out electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size of more than 200mm in the garbage on the second material loading belt.
Preferably, when the garbage storage is excavated, slope excavation is carried out according to the proportion of 1: 1-1: 2, and a working platform with the width of 4-5 m is arranged every 5-7 m of height difference.
Preferably, when the garbage storage is excavated, the concentration of methane gas in the garbage pile cannot exceed 5%.
The invention has the beneficial effects that:
1. the present scheme of the stock waste screening device and method adopts a two-stage screening process, the flow is simple, humus soil, heavy aggregate, light objects and metal in the stock waste can be separated quickly and effectively, the effective recovery of available resources in the stock waste is realized, the reutilization of a polluted site is realized simultaneously, the light objects generated by screening are packed by a packing machine, the scattering problem of the light waste can be effectively avoided, the influence on the surrounding environment is reduced, and the light objects are convenient to transport and process outside.
2. The garbage storage with high water content is turned over and aired, so that the water content can be reduced, the garbage looseness can be improved, the problems that equipment is easy to block and frequent shutdown and manual cleaning are solved, and the garbage screening efficiency is greatly improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Figure 1 shows a schematic view of an inventory waste screening device according to one embodiment of the present invention.
Fig. 2 shows a process flow diagram of an inventory waste screening method according to one embodiment of the invention.
Description of the reference numerals
1. A first material loading belt; 2. a uniform material distributor; 3. a second material loading belt; 4. a manual sorting platform; 5. a drum screen; 6. a belt conveyor; 7. a first magnetic separator; 8. a discharge conveyor belt; 9. a winnowing machine; 10. a second magnetic separator; 11. a hydraulic baling press;
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
The invention provides a stock garbage screening device, which comprises a primary sorting module and a secondary sorting module:
the primary separation module comprises a screening machine and a first magnetic separator;
the screening machine is provided with a first feeding hole, a first discharging hole and a first discharging hole, the first discharging hole is used for discharging undersize materials, and the first discharging hole is used for discharging oversize materials;
the first magnetic separator is connected with the first discharge hole and used for separating metals in undersize materials;
the secondary sorting module comprises a winnowing machine, a second magnetic separator and a packaging machine;
the winnowing machine is provided with a second feeding hole, a second discharging hole and a second discharging hole, the second feeding hole is connected with the first discharging hole, the second discharging hole is used for discharging light materials, and the second discharging hole is used for discharging heavy aggregate;
the second magnetic separator is connected with the second discharge port and used for separating metal in the heavy aggregate;
the baling press is connected in the second discharge gate for the light thing of baling press.
Specifically, the present scheme of the present invention adopts a two-stage screening process, the process is simple, the equipment investment is low, the occupied area is small, humus soil, heavy aggregate, light weight and metal in the garbage can be separated quickly and effectively, the available resources in the garbage can be effectively recovered, the polluted site can be reused, the light weight generated by screening is packed by a packing machine, the problem of scattering of the light weight garbage can be effectively avoided, the influence on the surrounding environment is reduced, and the light weight can be transported outside conveniently.
As a preferred scheme, the material feeding device further comprises a material feeding module, wherein the material feeding module comprises a first material feeding belt, an uniform material distributor and a second material feeding belt;
a third feeding port and a third discharging port are arranged on the uniform material distributor;
one end of the first feeding belt is a garbage storage feeding end, and the other end of the first feeding belt is connected to the third feeding port;
one end of the second feeding belt is connected with the third discharge hole, and the other end of the second feeding belt is connected with the first feed hole;
the first material loading belt is used for sending the stored garbage into the uniform distribution machine, the stored garbage is uniformly distributed on the second material loading belt after passing through the uniform distribution machine, and the second material loading belt transports the stored garbage to the screening machine.
As preferred scheme, the material loading module still includes artifical platform of selecting separately, and artifical platform of selecting separately sets up in second material loading area both sides.
Particularly, through setting up artifical sorting platform, can use the manual work to further filter the stock rubbish in second material loading area, separate out and sieve the great material of operation influence to follow-up equipment.
Preferably, the screening machine is a drum screen, the installation angle of the drum screen is 4-6 degrees, the rotating speed is 4-12 rpm, and the diameter of the screen is 15-80 mm.
Specifically, the installation angle and the rotating speed of the rotary screen can be adjusted according to the discharge speed, the diameter of the screen can be selected from 15mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm and 80mm, and the screen is specifically selected according to the humus treatment requirement.
As the preferred scheme, be provided with broken bag sword on the inner wall of drum sieve.
Specifically, parameters such as the number of bag breaking knives of the drum screen, the aperture of the screen mesh, the running speed and the like are adjusted according to the loose condition of garbage in the garbage storage, the content condition of bagged garbage and the discharging condition of humus soil, so that the screening effect is ensured to be optimal.
As the preferred scheme, the discharge openings of the first magnetic separator and the second magnetic separator are respectively provided with a discharge conveyor belt.
Specifically, through setting up the conveyer belt of unloading can be with the ejection of compact direct transport to the transshipment equipment of discharge gate department on, save time and manpower and materials.
As the preferred scheme, still include belt conveyor, belt conveyor sets up between screening machine and first magnetic separator, between screening machine and the air separator, between air separator and the second magnetic separator and between air separator and baling press.
Preferably, the baler is a hydraulic baler.
Preferably, the air volume of the air separator is 24000m3/h~30000m3/h。
Specifically, relevant parameters such as fan power, air nozzle angle and the like can be adjusted according to the content of the light weight material in the heavy weight material and the content of the heavy weight material in the light weight material in the air separation process.
The invention also provides a method for screening the stored garbage, which utilizes the screening device and comprises the following steps:
1) digging out and inputting the stored garbage into a screening machine;
2) starting a screening machine, and screening the garbage stored in the screening machine;
3) discharging the undersize products of the sieving machine into a first magnetic separator, removing iron metals in the undersize products, and then carrying out outward treatment;
4) inputting oversize materials of the screening machine into a winnowing machine, and screening the oversize materials of the screening machine by using the winnowing machine;
5) conveying the light objects screened by the winnowing machine into a packaging machine for packaging, and then carrying out outward treatment;
6) and discharging the heavy aggregate screened by the air separator into a second magnetic separator, removing iron metals in the heavy aggregate, and then transporting the heavy aggregate outwards.
Specifically, in the compression and packaging process, an iron wire is used for packaging the light object, and the unit width of the compressed and packaged light object is 1100mm, the height of the compressed and packaged light object is 1250mm, and the length of the compressed and packaged light object is 1500 mm.
Preferably, step 1) comprises:
1.1) excavating the stored garbage;
1.2) airing the dug-out stored garbage;
1.3) conveying the aired stored garbage to a first feeding belt;
1.4) the first material loading belt sends the stored garbage into the uniform material distributor;
and 1.5) uniformly distributing the stored garbage on a second material loading belt by the uniform material distributor, and conveying the stored garbage to the screening machine by the second material loading belt.
Specifically, before the excavation of the inventory garbage, the concentration of methane gas in the garbage pile body is ensured to be within a safe range, and meanwhile, the layered excavation is carried out in the excavation process.
Further, the dried stored garbage is transferred to the first material loading belt by the loader, the loader continuously shakes the hopper while discharging the material until the stored garbage in the hopper is completely discharged, so that the thickness of the stored garbage entering the first material loading belt is uniform, the looseness of the stored garbage is improved, and uniform distribution of the uniform distribution device is facilitated.
Preferably, step 1.2) further comprises:
and (4) overturning the aired stored garbage regularly, and separating out the materials with the particle size of more than 500 mm.
Specifically, the thickness of the layer should be ensured to be uniform in the airing process of the stored garbage, and materials with overlarge particle sizes are separated out by using a machine, so that the damage to a screening system is avoided.
Furthermore, the thickness of the garbage storage airing layer is preferably 0.8-1.5 m, and the garbage storage airing layer is turned over periodically by an excavator to separate materials with the particle size of more than 500 mm.
Preferably, step 1.5) further comprises:
and separating out electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size of more than 200mm in the garbage on the second material loading belt.
Specifically, 2 sorting personnel are equipped on the manual sorting platform and are respectively positioned on two sides of the upper second material loading belt, so that electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size of more than 200mm in the garbage stored on the manual sorting platform are separated.
Preferably, when the garbage storage is excavated, the garbage storage is excavated on a slope according to the proportion of 1: 1-1: 2, and a working platform with the width of 4-5 m is arranged every 5-7 m of height difference, so that the excavating machine can walk in a rotating manner.
Preferably, when the garbage storage is excavated, the concentration of methane gas in the garbage pile cannot exceed 5%.
Examples
FIG. 1 shows a schematic diagram of an inventory waste screening device according to the present embodiment; fig. 2 shows a process flow diagram of the inventory waste screening method according to the present embodiment.
As shown in fig. 1 to 2, the present invention provides an inventory waste screening device comprising:
one end of the first feeding belt 1 is a stored garbage feeding end, the other end of the first feeding belt is connected to a feeding hole of the uniform distribution machine 2, one end of the second feeding belt 3 is connected to a discharging hole of the uniform distribution machine 2, the other end of the second feeding belt is connected to a feeding hole of the drum screen 5 and used for uniformly distributing stored garbage and then inputting the distributed stored garbage into the drum screen 5, and the manual sorting platform 4 is arranged on two sides of the second feeding belt 3;
the installation angle of the rotary screen 5 is 4-6 degrees, the rotating speed is 4-12 rpm, the diameter of the screen is 15-80 mm, a bag breaking knife is arranged on the inner wall of the rotary screen, the discharge port of the rotary screen 5 is connected to the feed port of a first magnetic separator 7 through a belt conveyor 6, and the discharge port of the first magnetic separator 7 is connected to a discharge conveyor belt 8 through the belt conveyor 6; the discharge outlet of the drum screen 5 is connected with the feed inlet of the winnowing machine 9 by a belt conveyor 6;
the air quantity of the winnowing machine 9 is 24000m3/h~30000m3The frequency conversion is adjustable, and a discharge port of the winnowing machine 9 is connected to a hydraulic baler 11 through a belt conveyor 6; the discharge port of the winnowing machine 9 is connected with the feed port of the second magnetic separator 10 through the belt conveyor 6, and the discharge port of the second magnetic separator 10 is connected to the discharge conveyor belt 8 through the belt conveyor 6;
the method for screening the garbage storage by using the screening device comprises the following steps:
1) the method comprises the steps of (1) carrying out slope excavation on stored garbage according to the proportion of 1: 1-1: 2, setting a work with the width of 4-5 m every 5-7 m of height difference, and when the stored garbage is excavated, enabling the concentration of methane gas in a garbage pile to be not more than 5%;
2) airing the dug-out stored garbage, periodically turning over the stored garbage in the airing process, and separating out materials with the particle size of more than 500 mm;
3) conveying the aired stored garbage to a first feeding belt;
4) the first material loading belt sends the stored garbage to the uniform material distributor;
5) the uniform material distributor uniformly distributes the stored garbage on a second material loading belt, the second material loading belt transports the stored garbage to the drum screen, and meanwhile, sorting personnel are arranged on the manual sorting platform to separate out electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size of more than 200mm from the stored garbage on the second material loading belt;
6) starting the drum screen, and screening the garbage stored in the drum screen;
7) discharging the undersize of the drum screen into a first magnetic separator, removing iron metals in the undersize, and carrying out outward treatment;
8) inputting oversize materials of the drum screen into a winnowing machine, and sieving the oversize materials of the drum screen by using the winnowing machine;
9) conveying the light objects screened by the winnowing machine into a packaging machine for packaging, and then carrying out outward treatment;
10) and discharging the heavy aggregate screened by the air separator into a second magnetic separator, removing iron metals in the heavy aggregate, and then transporting the heavy aggregate outwards.
The method comprises the following steps:
firstly, carrying out excavation treatment on a garbage pile body, ensuring that the concentration of methane gas in the garbage pile body is not more than 5% in the excavation process, carrying out layered slope excavation in the garbage excavation operation, wherein the slope ratio is preferably 1: 1-1: 2, and setting a working platform with the width of 4-5 m every 5-7 m of height difference.
After the stored garbage is excavated, the stored garbage is aired in a landfill site with airing conditions, and an excavator is used for overturning periodically, so that the looseness of the stored garbage is improved, and the moisture content of the stored garbage is reduced.
And conveying the aired stock garbage to a first material loading belt by using a loader, and continuously shaking a hopper of the loader in the stock garbage unloading process until the stock garbage in the hopper is completely unloaded.
The material storage garbage is conveyed to the uniform material distributor through the first material feeding belt to be uniformly distributed, then is conveyed to the drum screen through the second material feeding belt to be sorted, manual sorting platforms are arranged on two sides of the middle of the second material feeding belt, and 2 sorting personnel are equipped to sort out electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size exceeding 200mm in the material storage garbage on the second material feeding belt, so that the influence of the materials on the normal operation of subsequent screening equipment is avoided.
And conveying the undersize materials after the screening by the drum to a first magnetic separator through a belt conveyor to remove iron metals, conveying the undersize materials to a discharging conveyor belt through the belt conveyor, and finally loading and transporting the undersize materials outside.
And (3) conveying oversize materials separated by the drum screen to a winnowing machine through a belt conveyor, conveying heavy aggregate separated by the winnowing machine to a second magnetic separator through the belt conveyor to remove iron metals, conveying the heavy aggregate to a discharging conveyor belt through the belt conveyor, and finally loading and transporting the heavy aggregate outside.
And conveying the light objects sorted by the winnowing machine to a hydraulic baling press by a belt conveyor, compressing and baling the light objects, and then carrying out external treatment.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. The utility model provides an inventory rubbish screening plant which characterized in that, includes that one-level selects separately module and second grade and selects separately the module:
the primary sorting module comprises a screening machine and a first magnetic separator;
the screening machine is provided with a first feeding hole, a first discharging hole and a first discharging hole, the first discharging hole is used for discharging undersize materials, and the first discharging hole is used for discharging oversize materials;
the first magnetic separator is connected with the first discharge hole and used for separating metal in the undersize products;
the secondary sorting module comprises a winnowing machine, a second magnetic separator and a packaging machine;
the winnowing machine is provided with a second feeding hole, a second discharging hole and a second discharging hole, the second feeding hole is connected to the first discharging hole, the second discharging hole is used for discharging light materials, and the second discharging hole is used for discharging heavy aggregate;
the second magnetic separator is connected to the second discharge port and used for separating metal in the heavy aggregate;
the packer is connected to the second discharge port and used for packing the light objects.
2. The inventory waste screening device as claimed in claim 1, further comprising a feeding module, said feeding module comprising a first feeding belt, a uniform distributor and a second feeding belt;
a third feeding hole and a third discharging hole are formed in the uniform material distributor;
one end of the first feeding belt is a storage garbage feeding end, and the other end of the first feeding belt is connected to the third feeding port;
one end of the second feeding belt is connected to the third discharge hole, and the other end of the second feeding belt is connected to the first feed hole;
the first material loading belt is used for conveying the stored garbage into the uniform distribution machine, the stored garbage is uniformly distributed on the second material loading belt after passing through the uniform distribution machine, and the second material loading belt transports the stored garbage into the screening machine.
3. The inventory waste screening device as claimed in claim 2, wherein said feeding module further comprises manual sorting platforms disposed on both sides of said second feeding belt.
4. The inventory waste screening device according to claim 1, wherein the screening machine is a drum screen, the included angle between the axis of the drum screen and the horizontal direction is 4-6 degrees, the rotating speed is 4-12 rpm, and the diameter of the screen is 15-80 mm.
5. A method of screening inventory waste using a screening device as claimed in any one of claims 1 to 4, the method including the steps of:
1) digging out and inputting the stored garbage into a screening machine;
2) starting a screening machine, and screening the garbage stored in the screening machine;
3) discharging the undersize products of the sieving machine into a first magnetic separator, removing iron metals in the undersize products, and then carrying out outward treatment;
4) inputting oversize materials of the screening machine into a winnowing machine, and screening the oversize materials of the screening machine by using the winnowing machine;
5) conveying the light objects screened by the winnowing machine into a packaging machine for packaging, and then carrying out outward treatment;
6) and discharging the heavy aggregate screened by the air separator into a second magnetic separator, removing iron metals in the heavy aggregate, and then transporting the heavy aggregate outwards.
6. The inventory waste screening method of claim 5, wherein said step 1) includes:
1.1) excavating the stored garbage;
1.2) airing the dug-out stored garbage;
1.3) conveying the aired stored garbage to a first feeding belt;
1.4) the first material loading belt sends the stored garbage into the uniform material distributor;
and 1.5) uniformly distributing the stored garbage on a second material loading belt by the uniform material distributor, and conveying the stored garbage to the screening machine by the second material loading belt.
7. The inventory waste screening method of claim 6, wherein said step 1.2) further comprises:
and (4) overturning the aired stored garbage regularly, and separating out the materials with the particle size of more than 500 mm.
8. The inventory waste screening method as claimed in claim 6, wherein said step 1.5) further comprises:
and separating out electric wires, iron wires, bundled clothes, glass bottles and materials with the particle size of more than 200mm in the garbage on the second material loading belt.
9. The method for screening the garbage stocks as claimed in claim 6, wherein when the garbage stocks are excavated, the garbage stocks are excavated by being put on a slope according to the proportion of 1: 1-1: 2, and a working platform with the width of 4-5 m is arranged every 5-7 m.
10. The method for screening the inventory of garbage of claim 6, wherein the excavation of the inventory of garbage is performed such that the methane gas concentration in the garbage heap does not exceed 5%.
CN201911252183.5A 2019-12-09 2019-12-09 Stock garbage screening device and method Pending CN110899119A (en)

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