CN113070321A - Construction waste treatment method - Google Patents
Construction waste treatment method Download PDFInfo
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- CN113070321A CN113070321A CN202110307298.0A CN202110307298A CN113070321A CN 113070321 A CN113070321 A CN 113070321A CN 202110307298 A CN202110307298 A CN 202110307298A CN 113070321 A CN113070321 A CN 113070321A
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- materials
- aggregate
- construction waste
- screening
- combustible
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- 239000002699 waste material Substances 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 74
- 239000007769 metal material Substances 0.000 claims abstract description 27
- 238000012216 screening Methods 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 19
- 238000004064 recycling Methods 0.000 claims abstract description 11
- 238000007885 magnetic separation Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims description 7
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- 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
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- 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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a construction waste treatment method, which comprises the following steps: s1, pre-sorting out ultralimit large aggregates, large-size metals and large-size combustible materials; s2, crushing the oversized large aggregate to obtain a primary crushed material; s3, carrying out primary screening operation on the screened residual construction waste and the primary crushed materials, and screening out oversize large aggregate and undersize mixture; s4, carrying out magnetic separation on the undersize mixture, and removing soil from the residual material after the magnetic separation to obtain an oversize separation material; s5, carrying out air separation operation on the materials sorted on the screen and sorting the heavy materials after air separation to obtain large-size aggregate; s6, sorting combustible sundries and metal materials from the oversize large aggregates, and then crushing to obtain secondary crushed materials; s7, carrying out magnetic separation on the secondary crushed materials, and then carrying out screening operation to obtain various levels of recycled aggregate; s8, crushing the large-particle recycled aggregate and the large-size aggregate again, and screening the crushed aggregates again; and S9, recycling various materials.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction waste treatment method.
Background
Construction waste is solid waste generated during the process of building construction, reconstruction, extension or demolition. According to different generation sources of the construction waste, the construction waste and the demolished construction waste can be divided. The construction waste is solid waste generated in new construction, reconstruction or extension projects, and the demolition construction waste is construction waste generated in demolition and demolition of buildings.
The existing construction waste treatment work generally adopts the backfill operation of the construction waste, and the recycling rate of the treatment mode is not high, so that a large amount of resources are wasted, and the treatment cost of the construction waste is increased; moreover, the construction waste backfilling in the soil can cause certain pollution to the soil, underground water and the like, cannot meet the requirement of environmental protection, and brings certain trouble to the treatment work of the construction waste.
Disclosure of Invention
The invention aims to solve the problems and provides a construction waste treatment method which is simple to operate and high in recycling rate.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a construction waste treatment method comprises the following steps:
s1, pre-sorting the construction waste manually or/and by an excavator, and selecting out overlimit large aggregates, large-size metals and large-size combustible substances in the construction waste;
s2, crushing the overrun large aggregate by using large crushing equipment to obtain a primary crushed material;
s3, conveying the residual construction waste and the preliminary crushed materials after manual or/and excavator screening to a stepped bar pre-screening machine through a feeding device for preliminary screening operation, and respectively screening out flexible combustible materials, oversize large aggregates and undersize mixtures;
s4, feeding the undersize mixture into a first magnetic separator for magnetic separation, and feeding the rest materials into a soil removal drum sieve for screening after a first metal material is selected to obtain undersize soil and oversize sorted materials;
s5, performing air separation operation on the oversize separated materials by using an air separator to obtain heavy materials and light materials, and separating the heavy materials to obtain second metal materials, large-size aggregates and first combustible impurities;
s6, sorting out second combustible impurities and third metal materials from the oversize large aggregates, and feeding the remaining materials in the oversize large aggregates into a jaw crusher for crushing to obtain secondary crushed materials;
s7, feeding the secondary crushed materials into a second magnetic separator for magnetic separation operation, feeding the remaining materials into a multi-layer mesh grading sieve for screening operation after a fourth metal material is selected, and respectively obtaining 0-5 mm regenerated aggregate, 5-10 mm regenerated aggregate, 10-25 mm regenerated aggregate and large-particle regenerated aggregate;
s8, feeding large-particle recycled aggregate and large-size aggregate into a reaction crusher for crushing, and feeding the crushed materials into a multi-layer mesh classifying screen again for screening;
s9, recycling the large-size metal, the first metal material, the second metal material, the third metal material and the fourth metal material; incinerating and recycling large-size combustible materials, flexible combustible materials, first combustible sundries, second combustible sundries and light materials; backfilling the undersize soil for utilization; 0-5 mm of recycled aggregate, 5-10 mm of recycled aggregate and 10-25 mm of recycled aggregate are produced and recycled.
Further, the large piece crushing device in the step S2 is a excavator hydraulic shear or a hydraulic crushing hammer.
Further, the feeding device in the step S3 includes a loader and a scraper chain conveyor.
Compared with the prior art, the invention has the advantages and positive effects that:
according to the invention, the construction waste is subjected to graded treatment operation by adopting each process, so that various materials such as metal materials, combustible materials, soil, recycled aggregate and the like are finally obtained, the construction waste is recycled to the greatest extent by classifying and recycling various materials, the resource waste is avoided, the treatment cost of the construction waste is reduced, meanwhile, the pollution to the soil and underground water system after the construction waste is backfilled is avoided, the requirement of environmental protection is met, and the convenience is brought to the treatment work of the construction waste.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the framework of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.
As shown in fig. 1, the embodiment discloses a construction waste treatment method, which includes the following steps:
s1, pre-sorting the construction waste manually or/and by an excavator, and selecting out overlimit large aggregates, large-size metals and large-size combustible substances in the construction waste; the ultralimit large aggregate is a material with the maximum external dimension larger than that of rear-end equipment, in particular to the maximum dimension aggregate allowed to enter a feeding port of a jaw crusher, such as the aggregate with the dimension larger than 600-700 mm;
s2, crushing the oversized large aggregate by using a hydraulic shear of a digging machine or a hydraulic crushing hammer to obtain a primary crushed material;
s3, conveying the residual construction waste and the primarily crushed materials after manual or/and excavator screening to a stepped bar pre-screening machine in a manner of combining a loader and a chain plate conveyor for primary screening operation, and respectively screening out flexible combustible materials, oversize large aggregates and undersize mixtures; the chain plate machine is adopted for feeding, so that the front end feeding height can be reduced, and meanwhile, the chain plate machine can be matched with a loader for feeding, and certain operation cost can be saved compared with the mode that the excavator is directly adopted for feeding;
adopt ladder stick bar screen (ing) machine in advance to separate thick reposition of redundant personnel, at first it can avoid being less than the material of the broken discharge gate size of jaw or need not to carry out the material of thick brokenly and get into jaw crusher, can full play jaw crusher's crushing efficiency, its front end raw materials feeding volume that can increase jaw crusher simultaneously to promote the productivity of whole strip production line: secondly, the method can remove large-size flexible sundries which are pre-sorted and missed to be sorted at the front end, avoid reducing the service performance of rear-end equipment when the flexible sundries enter the rear-end equipment, and simultaneously avoid increasing the impurity removal difficulty in subsequent operation after the flexible sundries are crushed so as to reduce the purity of a final product; in addition, the jaw crusher can prevent a large amount of sand from entering the jaw crusher to cause scouring and abrasion on the jaw crusher and rear-end equipment, and the service life of the equipment and vulnerable parts can be prolonged.
If the pre-screening machine is replaced by a screening machine (an upper-layer multi-step needle-shaped cantilever bar screen and a lower-layer steel wire woven net) similar to a Kaiser heavy screen, although the functions of coarse separation and soil removal can be realized at one time, the lower-layer net is extremely easy to block holes, and needs to be frequently stopped and cleaned, so that the production continuity and the production capacity are seriously influenced.
S4, feeding the undersize mixture into a first magnetic separator for magnetic separation, and feeding the rest materials into a soil removal drum sieve for screening after a first metal material is selected to obtain undersize soil and oversize sorted materials;
adopt the drum sieve as the soil removal sieve can prevent that light thing stifled hole, simultaneously if the moisture content is higher, also easy stifled hole of pan feeding section screen cloth needs the configuration to clean the round brush in order to clear up the sieve mesh in time. The scattered metal in the supplied materials needs to be removed before soil removal, so that scattered disassembled reinforcing steel bars, iron wires and the like can be prevented from being hung and clamped on the sieve pores to block the sieve pores, and the frequency of stopping machine for cleaning is reduced.
S5, performing air separation operation on the oversize separated materials by using an air separator to obtain heavy materials and light materials, and separating the heavy materials to obtain second metal materials, large-size aggregates and first combustible impurities;
s6, sorting out second combustible impurities and third metal materials from the oversize large aggregates, and feeding the remaining materials in the oversize large aggregates into a jaw crusher for crushing to obtain secondary crushed materials;
s7, feeding the secondary crushed materials into a second magnetic separator for magnetic separation operation, feeding the remaining materials into a multi-layer mesh grading sieve for screening operation after a fourth metal material is selected, and respectively obtaining 0-5 mm regenerated aggregate, 5-10 mm regenerated aggregate, 10-25 mm regenerated aggregate and large-particle regenerated aggregate;
s8, feeding large-particle recycled aggregate and large-size aggregate into a reaction crusher for crushing, and feeding the crushed materials into a multi-layer mesh classifying screen again for screening;
s9, recycling the large-size metal, the first metal material, the second metal material, the third metal material and the fourth metal material; incinerating and recycling large-size combustible materials, flexible combustible materials, first combustible sundries, second combustible sundries and light materials; backfilling the undersize soil for utilization; 0-5 mm of recycled aggregate, 5-10 mm of recycled aggregate and 10-25 mm of recycled aggregate are produced and recycled.
The recycled aggregate can be used for manufacturing recycled baking-free bricks and kerbs and for backfilling structures such as foundations, roadbeds, base layers, pavements and the like, or used as superior aggregate.
The particle size class of the final product can be adjusted according to the terminal resource utilization requirement, a 3-layer mesh classifying screen is usually adopted, 4 materials can be produced, downward compatibility can be realized (for example, only 3 or 2 materials need to be produced), and the particle size of each level of materials is controlled by replacing a screen with different apertures.
According to the invention, the construction waste is subjected to graded treatment operation by adopting each process, so that various materials such as metal materials, combustible materials, soil, recycled aggregate and the like are finally obtained, the construction waste is recycled to the greatest extent by classifying and recycling various materials, the resource waste is avoided, the treatment cost of the construction waste is reduced, meanwhile, the pollution to the soil and underground water system after the construction waste is backfilled is avoided, the requirement of environmental protection is met, and the convenience is brought to the treatment work of the construction waste.
Claims (3)
1. A construction waste treatment method is characterized by comprising the following steps: the method comprises the following steps:
s1, pre-sorting the construction waste manually or/and by an excavator, and selecting out overlimit large aggregates, large-size metals and large-size combustible substances in the construction waste;
s2, crushing the overrun large aggregate by using large crushing equipment to obtain a primary crushed material;
s3, conveying the residual construction waste and the preliminary crushed materials after manual or/and excavator screening to a stepped bar pre-screening machine through a feeding device for preliminary screening operation, and respectively screening out flexible combustible materials, oversize large aggregates and undersize mixtures;
s4, feeding the undersize mixture into a first magnetic separator for magnetic separation, and feeding the rest materials into a soil removal drum sieve for screening after a first metal material is selected to obtain undersize soil and oversize sorted materials;
s5, performing air separation operation on the oversize separated materials by using an air separator to obtain heavy materials and light materials, and separating the heavy materials to obtain second metal materials, large-size aggregates and first combustible impurities;
s6, sorting out second combustible impurities and third metal materials from the oversize large aggregates, and feeding the remaining materials in the oversize large aggregates into a jaw crusher for crushing to obtain secondary crushed materials;
s7, feeding the secondary crushed materials into a second magnetic separator for magnetic separation operation, feeding the remaining materials into a multi-layer mesh grading sieve for screening operation after a fourth metal material is selected, and respectively obtaining 0-5 mm regenerated aggregate, 5-10 mm regenerated aggregate, 10-25 mm regenerated aggregate and large-particle regenerated aggregate;
s8, feeding large-particle recycled aggregate and large-size aggregate into a reaction crusher for crushing, and feeding the crushed materials into a multi-layer mesh classifying screen again for screening;
s9, recycling the large-size metal, the first metal material, the second metal material, the third metal material and the fourth metal material; incinerating and recycling large-size combustible materials, flexible combustible materials, first combustible sundries, second combustible sundries and light materials; backfilling the undersize soil for utilization; 0-5 mm of recycled aggregate, 5-10 mm of recycled aggregate and 10-25 mm of recycled aggregate are produced and recycled.
2. The construction waste treatment method according to claim 1, characterized in that: the large-piece crushing equipment in the step S2 is excavator hydraulic shears or a hydraulic crushing hammer.
3. The construction waste treatment method according to claim 2, characterized in that: the feeding device in the step S3 includes a loader and a scraper chain conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307298.0A CN113070321A (en) | 2021-03-23 | 2021-03-23 | Construction waste treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307298.0A CN113070321A (en) | 2021-03-23 | 2021-03-23 | Construction waste treatment method |
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| Publication Number | Publication Date |
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| CN113070321A true CN113070321A (en) | 2021-07-06 |
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| CN202110307298.0A Pending CN113070321A (en) | 2021-03-23 | 2021-03-23 | Construction waste treatment method |
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| CN (1) | CN113070321A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751465A (en) * | 2021-09-03 | 2021-12-07 | 联迈环境科技(苏州)有限公司 | Resource disposal process for construction waste and decoration waste |
| CN118002593A (en) * | 2024-03-01 | 2024-05-10 | 北京格林雷斯环保科技有限公司 | Fitment garbage solid waste screening device and technology |
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| CN209005920U (en) * | 2018-08-14 | 2019-06-21 | 襄阳市市政工程总公司 | A kind of cracking and sorting processing system of building waste |
| CN110813483A (en) * | 2018-08-14 | 2020-02-21 | 襄阳市市政工程总公司 | Construction waste crushing and sorting treatment system |
| CN111360042A (en) * | 2020-04-20 | 2020-07-03 | 上海环境工程设计研究院有限公司 | Building decoration garbage recycling treatment system and process |
| CN111957420A (en) * | 2020-06-28 | 2020-11-20 | 北京格林雷斯环保科技有限公司 | Building waste pretreatment system and pretreatment method |
| CN112427124A (en) * | 2020-10-30 | 2021-03-02 | 北京建工资源循环利用投资有限公司 | Construction waste recycling method and equipment |
-
2021
- 2021-03-23 CN CN202110307298.0A patent/CN113070321A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1393296A (en) * | 2001-06-27 | 2003-01-29 | *** | Process for classifying and reclaiming wastes |
| CN108237135A (en) * | 2016-12-27 | 2018-07-03 | 越艳 | A kind of equipment of building waste pretreatment system |
| CN209005920U (en) * | 2018-08-14 | 2019-06-21 | 襄阳市市政工程总公司 | A kind of cracking and sorting processing system of building waste |
| CN110813483A (en) * | 2018-08-14 | 2020-02-21 | 襄阳市市政工程总公司 | Construction waste crushing and sorting treatment system |
| CN109226194A (en) * | 2018-09-26 | 2019-01-18 | 鸿翔环境产业有限公司 | A kind for the treatment of process for fitting up waste material |
| CN111360042A (en) * | 2020-04-20 | 2020-07-03 | 上海环境工程设计研究院有限公司 | Building decoration garbage recycling treatment system and process |
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| CN112427124A (en) * | 2020-10-30 | 2021-03-02 | 北京建工资源循环利用投资有限公司 | Construction waste recycling method and equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751465A (en) * | 2021-09-03 | 2021-12-07 | 联迈环境科技(苏州)有限公司 | Resource disposal process for construction waste and decoration waste |
| CN118002593A (en) * | 2024-03-01 | 2024-05-10 | 北京格林雷斯环保科技有限公司 | Fitment garbage solid waste screening device and technology |
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