CN111922032A - Simple screening method for stored garbage of landfill - Google Patents
Simple screening method for stored garbage of landfill Download PDFInfo
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- CN111922032A CN111922032A CN202010649969.7A CN202010649969A CN111922032A CN 111922032 A CN111922032 A CN 111922032A CN 202010649969 A CN202010649969 A CN 202010649969A CN 111922032 A CN111922032 A CN 111922032A
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- garbage
- combustible
- materials
- screening
- screening method
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Links
- 238000012216 screening Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 74
- 239000004744 fabric Substances 0.000 claims abstract description 13
- 239000005060 rubber Substances 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 12
- 239000002023 wood Substances 0.000 description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 6
- 235000017491 Bambusa tulda Nutrition 0.000 description 6
- 241001330002 Bambuseae Species 0.000 description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 6
- 239000011425 bamboo Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003864 humus Substances 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING 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
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING 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
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING 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
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING 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
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING 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
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a simple screening method for refuse storage in a landfill, which comprises the following specific steps: stabilizing the garbage, digging and transporting the garbage, crushing large garbage, vibrating and scattering the garbage, screening fine soil by using a primary drum screen and a disc type separator, screening aggregate by using a wind power separator, manually separating combustible large objects, wherein the combustible large objects comprise rubber, plastic and cloth, screening fine soil by using a secondary drum screen, separating recycled objects by using a bounce screening machine, and packaging the combustible objects. The invention divides the garbage storage into fine soil, aggregate and combustible material, separates combustible large material and recovered material from the combustible material, further separates the material in the combustible material, realizes resource utilization, and can be widely applied to the technical field of garbage treatment.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a simple screening method for stored garbage in a landfill.
Background
In the simple landfill, except for high content of humus, the content of combustible components such as plastics, fabrics, wood, bamboo, rubber and the like is high. In the traditional screening process, substances such as rubber, plastics, cloth and wood are directly screened out in the form of combustible substances and are directly sent to an incineration plant for incineration treatment, and although energy recovery is carried out through incineration, under the background that the current incineration cannot meet the incineration requirement of fresh daily garbage, the traditional screening method is to be further improved to recover the rubber, the plastics, the cloth and the wood in the combustible substances in the form of recovered substances.
Disclosure of Invention
In order to solve at least one of the technical problems, the invention provides a simple screening method for garbage storage in a landfill to obtain recovered materials by separating combustible materials again, which adopts the following technical scheme:
the invention provides a simple screening method for refuse storage in a landfill, which comprises the following specific processes: stabilizing the garbage, digging and transporting the garbage, crushing large garbage, vibrating and scattering the garbage, screening fine soil by using a primary drum screen and a disc type separator, screening aggregate by using a wind power separator, manually separating combustible large objects, wherein the combustible large objects comprise rubber, plastic and cloth, screening fine soil by using a secondary drum screen, separating recycled objects by using a bounce screening machine, and packaging the combustible objects.
Further, squeeze into the rubbish heap body with gas injection pipe and exhaust tube, the gas injection pipe pressurization pours into the rubbish heap body with fresh air into, and the exhaust tube takes out carbon dioxide gas in the rubbish heap body, and the direction of bleeding is exchanged with gas injection and air exhaust every 1 ~ 2 hours of operation, and the time of stabilization is 7 ~ 10 days.
Further, the temperature and humidity of the extracted gas are detected during the stabilization treatment.
And further, screening the scattered garbage materials by using a primary drum screen, discharging undersize materials with the particle size smaller than 40mm from a discharge port at the bottom of the primary drum screen, discharging oversize materials with the particle size larger than 40mm from a discharge port at the tail part of the primary drum screen, feeding oversize materials discharged by the primary drum screen into a disc type separator, discharging undersize materials with the particle size smaller than 10mm from a discharge port at the bottom of the disc type separator, and discharging the rest oversize materials from a discharge port at the tail part of the disc type separator.
Further, oversize materials of the primary drum screen and oversize materials of the disc type sorting machine enter a wind power sorting machine, heavy materials fall on a manual sorting platform by self weight, and combustible materials fall on a combustible material conveying belt by wind power to be output.
Further, after the combustible large objects are manually selected, the residual heavy objects enter the aggregate pit through the aggregate conveying belt.
And further, the combustible materials screened by the wind power separator are gathered into a secondary drum screen, oversize materials with the particle size larger than 60mm are discharged from a discharge port at the tail part of the secondary drum screen, and undersize materials with the particle size smaller than 60mm are discharged from a discharge port at the bottom of the secondary drum screen and gathered into fine land.
And furthermore, oversize materials of the secondary drum screen are converged into a box body of the horizontal binding machine through a conveying belt to be compressed and packed.
Further, the compression ratio is 1:1.5 to 1: 1.8.
And further, screening the crushed garbage by using a bounce screening machine, and sorting and recovering the garbage.
Has the advantages that: the invention divides the garbage storage into fine soil, aggregate and combustible material, separates combustible large material and recovered material from the combustible material, further separates the material in the combustible material, realizes resource utilization, and can be widely applied to the technical field of garbage treatment.
Drawings
FIG. 1 is a flow diagram of a screening method;
FIG. 2 is a schematic distribution diagram of a primary trommel, a disc type separator, a wind separator, a manual separation platform, a secondary trommel and a bouncing screening machine;
FIG. 3 is a schematic structural view of a screen shaft in the bouncing screening machine.
Detailed Description
The present invention will be further described with reference to fig. 1 to 3.
The invention relates to a simple screening method for refuse storage in a landfill, which comprises the following steps: stabilizing the garbage, digging and transporting the garbage, crushing large garbage, vibrating and scattering the garbage, screening fine soil by using a primary drum sieve 11 and a disc type separator 12, screening aggregate by using a wind power separator 13, manually separating combustible large objects, screening the combustible large objects by using rubber, plastic and cloth, screening the fine soil by using a secondary screening method, separating recycled objects by using a bounce screening machine 17, and packaging the combustible objects.
The stabilization treatment is a process for rapidly stabilizing the garbage pile body by technical measures such as gas injection ventilation, gas extraction and the like. Squeeze into the rubbish heap body with gas injection pipe and exhaust tube, the degree of depth of squeezing into should be greater than the exploitation degree of depth 0.5 ~ 1m, and gas injection pipe and exhaust tube pass through hose connection to fan, and the gas injection pipe pressurization pours fresh air into the rubbish heap body into, and carbon dioxide gas takes out in the exhaust tube with the rubbish heap body, and the orientation of bleeding and air exhaust is exchanged every 1 ~ 2 hours of operation, prevents that the interior oxygen concentration of processing unit is poor to form local anaerobic environment. The stabilization treatment time is 7-10 days, the temperature and the humidity of the extracted gas are detected in the treatment process, the operation parameters are adjusted through the detection result, and the non-anaerobic microorganisms in the garbage are activated to be rapidly propagated, so that the generation of methane is inhibited.
When the garbage is excavated and transported, the equipment enters a field to level the field, performs construction paying off and then performs surface layer excavation, performs side slope putting and side slope supporting after the surface layer excavation is finished, performs deep layer excavation, transfers to the next area after the excavation reaches the reserved garbage elevation, performs subsequent construction, and transfers the garbage to a garbage stacking area before large pieces are crushed in real time by a garbage transfer vehicle in the safe excavation work.
And the stored garbage transported to the large-piece crushing system is crushed fully by the large-piece crusher and transported to a material storage area at the front end of the sorting system after crushing. The garbage has various materials with different sizes, and after crushing treatment, large materials and materials which are easy to wind are crushed into materials with greatly reduced sizes, so that the efficient operation of the screening system is ensured.
Stock rubbish gets into anterior segment material district after the breakage, throws the material by the hook machine and gets into the vibration feeder hopper, and the motor drives eccentric wheel subassembly high-speed rotatory through belt and belt pulley in the vibration feeder hopper, and eccentric wheel subassembly produces powerful centrifugal force and drives the vibration hopper and carry out the shake motion of certain frequency under the cooperation that the spring-supported, and the stock rubbish of balling is scattered, and the vibration feeder hopper is discharging the material under the state of transferring to suitable angle.
The scattered garbage materials are screened by the first-stage drum screen 11, and the garbage materials are turned and rolled on the sunning surface along with the inclination and rotation of the drum screen after entering the first-stage drum screen 11. And discharging undersize products with the particle size of less than 40mm from a discharge hole at the bottom of the primary drum sieve 11, wherein most of the undersize products are humus. Oversize materials with the grain diameter larger than 40mm are discharged from a discharge hole at the tail part of the primary drum screen 11 and are light materials such as bricks, stones, plastics and the like. Oversize products discharged by the primary drum sieve 11 enter the disc type separator 12, undersize products with the grain diameter smaller than 10mm are discharged from a discharge hole at the bottom of the disc type separator 12, and most of the undersize products are fine soil. The rest oversize materials are discharged from a discharge port at the tail part of the disc separator 12 and are granular aggregates and light-weight RDF.
Oversize materials of the primary drum screen 11 and oversize materials of the disc type sorting machine 12 enter the wind power sorting machine 13, the oversize materials freely fall along a parabola after entering the wind power sorting machine 13, wind penetrates through garbage in the horizontal direction in the falling process, materials with different masses in the garbage are divided in two directions under the action of wind, a part of light materials move forwards in the horizontal direction, the combustible materials are blown down on a combustible material conveying belt by wind power through a sorting blowing nozzle, and the heavy materials fall on the manual sorting platform 14 by self weight. The discharge port at the tail end of the air separator 13 is provided with a cyclone separator 16 for separating fine combustible substances.
The heavy objects falling into the manual sorting platform 14 are manually selected from large combustible objects which are difficult to break and screen, such as rubber, plastic and cloth, and the large combustible objects selected manually can be recycled. The remaining heavies enter the aggregate pit through an aggregate conveyor belt.
Combustible materials screened by the air separator 13 are gathered into the secondary rotary screen 15, and oversize materials with the particle size larger than 60mm are discharged from a discharge opening at the tail part of the secondary rotary screen 15. And undersize products with the particle size of less than 60mm are discharged from a discharge hole at the bottom of the secondary drum sieve 15 and are gathered into fine land, mainly fine plastics and humus.
Oversize materials of the secondary drum screen 15 are gathered into a box body of the horizontal binding machine through a conveying belt to be compressed and packed, the volume of the garbage is reduced by pressure, and the compression ratio is 1: 1.5-1: 1.8, so that the garbage is convenient to transport and store.
And screening the crushed garbage by using a bounce screening machine 17, and sorting recovered materials, wherein the recovered materials comprise rubber, cloth and wood and bamboo. The bounce screening machine 17 is provided with a plurality of screening shafts 18, the screening shafts 18 are arranged in parallel in a horizontal plane, screening sheets 19 are arranged on the screening shafts 18, the screening shafts 18 rotate in the same direction, garbage moves forwards along the screening surfaces and is dispersed, recovered materials of large materials such as rubber, cloth and wood bamboo are driven by the screening shafts 18 to be conveyed, and the rest garbage is discharged from gaps of the screening shafts 18 to realize the purpose of sorting. On the basis of the traditional screening, a bounce screening machine 17 is introduced to separate and recover the wood, bamboo, cloth, rubber and the like.
Aiming at the characteristic that the combustible materials separated from the simple landfill have high contents of plastics, wood, bamboo, cloth and rubber, the screening method separates and recovers the components of the wood, the bamboo, the cloth and the rubber, and the like.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A simple method for screening the stored garbage in a landfill site is characterized by comprising the following steps: the garbage is stabilized, the garbage is dug and transported, large garbage is crushed, the garbage is scattered through vibration, fine soil is sieved through a primary drum sieve (11) and a primary disc type sorting machine (12), aggregate is sieved through a wind power sorting machine (13), combustible large objects are manually sorted, the combustible large objects comprise rubber, plastic and cloth, fine soil is sieved through a secondary drum sieve (15), recovered objects are sorted through a bounce screening machine (17), and the combustible objects are packaged.
2. The simple landfill inventory garbage screening method according to claim 1, characterized in that: the garbage pile is driven into the garbage pile body through the gas injection pipe and the exhaust pipe, fresh air is injected into the garbage pile body through pressurization of the gas injection pipe, carbon dioxide gas in the garbage pile body is pumped out through the exhaust pipe, the gas injection direction and the gas pumping direction are exchanged every 1-2 hours of operation, and the stabilization treatment time is 7-10 days.
3. The simple landfill inventory garbage screening method according to claim 2, characterized in that: the temperature and humidity of the extracted gas are detected during the stabilization process.
4. The simple landfill inventory garbage screening method according to claim 1, characterized in that: the scattered garbage materials are screened by the aid of the first-level drum screen (11), undersize materials with the particle sizes smaller than 40mm are discharged from a discharge port in the bottom of the first-level drum screen (11), oversize materials with the particle sizes larger than 40mm are discharged from a discharge port in the tail of the first-level drum screen (11), oversize materials discharged by the first-level drum screen (11) enter the disc type sorting machine (12), undersize materials with the particle sizes smaller than 10mm are discharged from a discharge port in the bottom of the disc type sorting machine (12), and other oversize materials are discharged from a discharge port in the tail of the disc type sorting machine (12).
5. The simple landfill inventory garbage screening method according to claim 4, characterized in that: oversize materials of the primary drum screen (11) and oversize materials of the disc type sorting machine (12) enter a wind power sorting machine (13), heavy materials fall on a manual sorting platform (14) by self weight, and combustible materials fall on a combustible material conveying belt by wind power to be output.
6. The simple landfill garbage screening method according to claim 5, characterized in that: after the combustible large objects are manually selected, the residual heavy objects enter the aggregate pit through the aggregate conveying belt.
7. The simple landfill inventory garbage screening method according to claim 6, characterized in that: combustible materials screened by the wind power separator (13) are gathered into the secondary rotary screen (15), oversize materials with the grain size larger than 60mm are discharged from a discharge hole at the tail part of the secondary rotary screen (15), undersize materials with the grain size smaller than 60mm are discharged from a discharge hole at the bottom of the secondary rotary screen (15) and are gathered into fine land.
8. The simple landfill inventory garbage screening method according to claim 7, characterized in that: oversize materials of the secondary drum screen (15) are converged into a box body of the horizontal binding machine through a conveying belt to be compressed and packed.
9. The simple landfill inventory waste screening method of claim 8, wherein: the compression ratio is 1:1.5 to 1: 1.8.
10. The simple landfill inventory garbage screening method according to claim 1, characterized in that: the garbage is screened by a bounce screening machine (17) to sort and recover the materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010649969.7A CN111922032A (en) | 2020-07-08 | 2020-07-08 | Simple screening method for stored garbage of landfill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010649969.7A CN111922032A (en) | 2020-07-08 | 2020-07-08 | Simple screening method for stored garbage of landfill |
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| CN111922032A true CN111922032A (en) | 2020-11-13 |
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| CN202010649969.7A Pending CN111922032A (en) | 2020-07-08 | 2020-07-08 | Simple screening method for stored garbage of landfill |
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