Construction waste fine processing production line and production method

Abstract

The application discloses a building garbage fine treatment production line and a production method. The fine treatment production line comprises a sorting line and a crushing line; the sorting line comprises a pre-sorting unit, a first-stage sorting unit, a second-stage sorting unit, a third-stage sorting unit and a fourth-stage sorting unit, and plastic film, wood, PVC, rubber, brick slag base mixture, foam, stone powder, sand and metal are obtained; the crushing line is used for crushing, screening, magnetic separation and air separation of the brick slag base mixture and powder obtained in the sorting line, and plastic film, stone, stone powder and metal are obtained. The application also discloses a production method for fine treatment of building garbage by using the building garbage fine treatment production line. The application solves the problem that the plastic film in the building garbage cannot be finely separated in the prior art, and improves the recycling rate of the plastic film in the building garbage.

Description

Technical Field

[0001] This invention relates to a production line and method for the refined processing of construction waste, belonging to the field of construction waste recycling technology. Background Technology

[0002] Construction waste refers to the waste generated by construction units or individuals during the construction, laying, demolition, and repair of various buildings, structures, and pipelines. Construction waste contains components such as plastic film, wood, PVC, rubber, scrap metal, stones, stone powder, brick slag, and foam. To recycle the plastic film for use in building pipes, oil refining, and as RDF fuel, it is necessary to separate the components of construction waste.

[0003] However, in the field of construction waste recycling technology, due to the complex composition of construction waste, current conventional recycling and processing technologies are unable to effectively separate the plastic film from the construction waste. As a result, a large amount of plastic film usually remains in the construction waste, leading to a low recycling rate of plastic film. Summary of the Invention

[0004] The present invention aims to provide a production line and method for the refined processing of construction waste, which solves the problem that existing technologies are unable to achieve refined separation of plastic film in construction waste, and improves the recycling rate of plastic film in construction waste.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A production line for the refined processing of construction waste includes a sorting line and a crushing line, wherein the sorting line includes:

[0007] The pre-sorting unit is used to pre-sort construction waste to remove waste that is not suitable for processing, and send the remaining material to the primary sorting unit;

[0008] The primary sorting unit uses a spiral roller screen to screen materials in descending order of particle size, forming the first-stage material that enters the bouncing screen, the second-stage material that enters the sorting chamber, and the third-stage material that enters the bar tension screen.

[0009] The secondary sorting unit includes a bouncing screen, a sorting chamber, and a bar tensioning screen. The bouncing screen produces plastic film, the sorting chamber produces plastic film, wood, PVC, rubber, and brick slag base mixture, and the bar tensioning screen sorts the materials according to their particle size from large to small to form the fourth-stage material that enters the horizontal air classifier, the fifth-stage material that enters the negative pressure air classifier, and the sixth-stage material that is collected.

[0010] The third sorting unit includes a horizontal air separator and a negative pressure air separator, the brick-dust-based mixture and the material containing plastic film are obtained through the horizontal air separator, and the brick-dust-based mixture and the plastic film are obtained through the negative pressure air separator;

[0011] The fourth sorting unit includes a single-layer flip-flow screen for further sorting of the material containing plastic film obtained through the horizontal air separator, and the powder and the plastic film are obtained through the single-layer flip-flow screen.

[0012] The crushing line is used for further crushing, screening, magnetic separation and air separation of the brick-dust-based mixture and the powder obtained through the sorting line, so as to obtain the plastic film, the stone, the stone powder and the metal.

[0013] The material is sequentially screened according to particle size from large to small in the first sorting unit to form the first material (such as particle size greater than 180 mm), the second material (such as particle size between 50 mm and 180 mm), and the third material (such as particle size less than 50 mm), and the material is sequentially screened according to particle size from large to small in the second sorting unit to form the fourth material (such as particle size greater than 30 mm), the fifth material (such as particle size between 8 mm and 30 mm), and the sixth material (such as particle size less than 8 mm).

[0014] Further, the crushing line comprises:

[0015] The jaw crusher is used for primary crushing of the brick-dust-based mixture and the powder.

[0016] The double-layer vibrating screen is used for sequentially screening the material after the primary crushing and the secondary crushing according to particle size from large to small to form the material entering the impact crusher, the material entering the air separation unit, and the material entering the single-layer vibrating screen.

[0017] The impact crusher is used for secondary crushing of the material.

[0018] The third magnetic separator is used for magnetic separation of the material ready to enter the impact crusher to obtain the metal.

[0019] The air separation unit is used for air separation of the material to obtain the plastic film and the stone.

[0020] The single-layer vibrating screen is used for re-screening of the material to obtain the stone and the stone powder.

[0021] Further, the brick-dust-based mixture and the powder obtained through the sorting line are stacked in the crushing and feeding yard, and the crushing line further comprises:

[0022] The second excavator is used for sending the material in the crushing and feeding yard to the vibrating feeder.

[0023] The vibrating feeder is used for feeding the material to the jaw crusher.

[0024] Further, the pre-sorting unit comprises:

[0025] A first excavator for pre-sorting while excavating, the first excavator comprising a bucket, the bucket comprising at least two spaced-apart tines;

[0026] A plate chain feeder for feeding the pre-sorted material to the screw auger screen;

[0027] A manual sorting platform for removing missed and unsuitable garbage during the feeding process of the plate chain feeder.

[0028] Further, the sorting house comprises:

[0029] A house body for providing a closed environment;

[0030] A plurality of sorting stations and / or sorting devices arranged on the same side of the house body for sorting the material entering the house body;

[0031] A sorting bin for collecting the sorted plastic film, wood, PVC, and rubber, the sorting bin being arranged outside the house body and being in communication with the bottom of the house body through a passage, the sorting bin being arranged opposite to the sorting stations and / or sorting devices.

[0032] Further, the four-stage sorting unit comprises a manual sorting station arranged between the horizontal air separator and the crushing and feeding yard, the manual sorting station being used for sorting the brick-dust-based mixture obtained from the horizontal air separator to obtain wood and PVC.

[0033] Further, the sorting line further comprises an additional sorting unit, the additional sorting unit comprising a first magnetic separator for magnetically sorting the brick-dust-based mixture obtained from the sorting house, a second magnetic separator for magnetically sorting the fourth-stage material, and a foam air separator for air sorting the sixth-stage material, the first magnetic separator and the second magnetic separator being used to obtain metal, and the foam air separator being used to obtain foam particles.

[0034] Further, both the sorting line and the crushing line comprise atomization equipment for spraying and dust removal.

[0035] Further, the plastic film obtained from the sorting line and the crushing line is washed in a washing line, the washing line comprising:

[0036] A multi-stage shredding unit for multi-stage shredding of the plastic film;

[0037] A separator for separating impurities from the multi-stage shredded plastic film;

[0038] A rinsing pool for rinsing the plastic film after impurity separation;

[0039] A dehydration and baling system for dehydrating and baling plastic film after washing;

[0040] A water circulation system for circulating sewage from the separator, the washing pool and the dehydration and baling system, and providing circulating clean water to the separator and the washing pool.

[0041] Based on the same inventive concept, the application further provides a production method for fine processing of construction waste by using the construction waste fine processing production line.

[0042] S0, pre-separation: pre-separation of construction waste, removal of unsuitable waste, and sending the remaining material to a first separation unit;

[0043] S1, first separation: using a spiral roller screen to screen the material according to particle size from large to small to form a first-stage material entering the bounce screen, a second-stage material entering the sorting room, and a third-stage material entering the rod slack screen;

[0044] S2, second separation: using the bounce screen to screen the incoming material to obtain plastic film; using the sorting room to separate the incoming material to obtain plastic film, wood, PVC, rubber, and brick residue base mixture, and using the sorting room to magnetically separate the brick residue base mixture to obtain metal; using the rod slack screen to screen the incoming material according to particle size from large to small to form a fourth-stage material entering the horizontal air separator, a fifth-stage material entering the negative pressure air separator, and a sixth-stage material being collected, and using the rod slack screen to magnetically separate the fourth-stage material to obtain metal and to foam air separation of the sixth-stage material to obtain foam particles;

[0045] S3, third separation: using the horizontal air separator to horizontally air separate the incoming material to obtain brick residue base mixture and material containing plastic film; using the negative pressure air separator to negatively pressure air separate the incoming material to obtain brick residue base mixture and plastic film;

[0046] S4, fourth separation: separately sorting the brick residue base mixture and the material containing plastic film obtained by horizontal air separation to obtain wood, PVC, powder, and plastic film;

[0047] S5, crushing line processing: further crushing, screening, magnetically separating, and air separating the obtained brick residue base mixture and powder to obtain plastic film, stones, stone powder, and metal.

[0048] Further, the step of crushing line processing comprises:

[0049] S51, first-stage crushing: using a jaw crusher to first-stage crush the obtained brick residue base mixture and powder;

[0050] S52, vibration sorting: adopt double-layer vibration screen to screen the materials after first crushing and second crushing according to particle size from large to small to form materials entering the impact crusher, materials entering the air separation unit, and materials entering the single-layer vibration screen, and magnetically select the materials ready to enter the impact crusher to obtain metals;

[0051] S53, three-grade processing: adopt the impact crusher to perform second crushing on the materials; adopt the air separation unit to perform air separation on the materials to obtain plastic film and stones; adopt the single-layer vibration screen to screen the materials again to obtain stones and stone powder.

[0052] Compared with the prior art, the application has the following beneficial effects:

[0053] 1, The building waste fine processing production line of the application avoids the problem that the conventional processing technology of first crushing and then sorting is prone to plastic film winding and high energy consumption by first sorting and then crushing; at the same time, by setting the spiral roller screen as a first sorting unit upstream of the bounce screen, the problem of low production capacity and frequent maintenance caused by the use of the bounce screen as the first sorting device in the industry for many years is solved, the fine degree of separating plastic film from building waste is improved, the recycling rate of plastic film is improved, the material sorting precision and sorting quality are improved, and the sorting precision reaches 85%-90%.

[0054] 2, The building waste fine processing production line of the application independently sets the sorting line and the crushing line, that is, the sorting line and the crushing line are only connected into an integral production line at the crushing material stacking yard and the second excavator, and the sorting line and the crushing line independently operate at the remaining devices, so that the crushing link and the sorting link of the traditional building waste processing process are divided into two independent units, the operation time of a single unit is effectively increased, and the energy consumption and maintenance cost are effectively reduced.

[0055] 3, The building waste fine processing production line of the application improves the pre-sorting efficiency and sorting precision by additionally setting a first excavator for pre-sorting while shoveling in the pre-sorting unit and cooperating with the manual sorting platform, improves the fine degree of separating plastic film from building waste, and improves the recycling rate of plastic film in building waste.

[0056] 4, The building waste fine processing production line of the application can accurately separate materials by setting a rod bar flip-flow screen for composite screening and combining with negative pressure air separation and adsorption, improves the fine degree of separating plastic film from building waste, and improves the recycling rate of plastic film in building waste.

[0057] 5、The construction waste fine processing production line of the present application, through the double-stage crushing and closed loop design of the jaw crusher, double-layer vibrating screen and impact crusher, makes the qualified rate of aggregate particle size ≥95%, greatly improves the qualified rate of particle size of recycled aggregate; at the same time, through the setting of three times of magnetic separation, makes the metal recovery rate ≥98%, greatly improves the metal recovery rate.

[0058] 6、The construction waste fine processing production line of the present application, through the setting of the water washing line, reduces the impurity content that may be contained in the plastic film obtained from the sorting line and crushing line, further improves the fine degree of plastic film separation, and improves the purity and recycling rate of plastic film.

[0059] 7、The production method for fine processing of construction waste of the present application, through "pre-sorting + multi-stage screening + wind selection at each stage + three times of magnetic separation + crushing closed loop", can separate the plastic film in the construction waste more finely, and improves the recycling rate of plastic film in the construction waste. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 is the process flow chart of an embodiment of the present application. DETAILED DESCRIPTION

[0061] The present application will be further described in detail below with reference to the accompanying drawings.

[0062] Example 1

[0063] Referring to Figure 1 , the present embodiment provides a construction waste fine processing production line. The production line comprises a sorting line, a crushing line and a water washing line. The sorting line comprises a pre-sorting unit, a first-stage sorting unit, a second-stage sorting unit, a third-stage sorting unit, a fourth-stage sorting unit, an additional sorting unit, a light material tailings yard, a light material bin, a third-stage stone powder stock yard and a crushing feed stock yard. The crushing line is used for further crushing, screening, magnetic separation and air separation of the brick residue base mixture and powder in the crushing feed stock yard; the crushing line comprises a second excavator for feeding the material in the crushing feed stock yard to a vibrating feeder, a vibrating feeder for uniformly feeding the jaw crusher, a jaw crusher arranged downstream of the vibrating feeder, a double-layer vibrating screen arranged downstream of the jaw crusher, an impact crusher and an air separation unit respectively connected to the double-layer vibrating screen through a belt conveyor, and a single-layer vibrating screen, and a third magnetic separator arranged on the belt conveyor between the double-layer vibrating screen and the impact crusher, wherein the discharge port of the impact crusher is in communication with the feed port of the double-layer vibrating screen. The water washing line is used for water washing of the plastic film obtained from the sorting line and the crushing line; the water washing line comprises a multi-stage shredding unit, a separator, a flushing pool, a dehydration and packaging system and a water circulation system.

[0064] In the sorting line: the pre-sorting unit includes a first excavator, a plate chain feeder, and a single-person artificial sorting platform. The first excavator includes a shovel hopper, which includes at least two spaced tooth bars for shoveling. A spiral roller screen is connected to the discharge port of the plate chain feeder through a feeding belt, and the single-person artificial sorting platform is arranged on the side of the feeding belt. Through the cooperation of the first excavator and the single-person artificial sorting platform, large-size materials can be quickly separated to reduce the load of the subsequent production line.

[0065] In the sorting line: the first-stage sorting unit adopts a spiral roller screen, and the discharge port of the spiral roller screen is connected to a bounce screen, a sorting room, and a rod slack screen. The spiral roller screen screens materials according to particle size from large to small to form first-stage materials entering the bounce screen, second-stage materials entering the sorting room, and third-stage materials entering the rod slack screen. The particle size of the first-stage materials is greater than 180 mm, the particle size of the second-stage materials is between 50 mm and 180 mm, and the particle size of the third-stage materials is less than 50 mm.

[0066] In the sorting line: the bounce screen of the second-stage sorting unit is connected to a light material tailing yard, a sorting room, and a rod slack screen. The bounce screen is a conventional product purchased on the market; the bounce screen includes a rack, a power device installed on the rack, a crankshaft installed on the rack and connected to the power device, and eight screen plates installed in the rack and connected to the crankshaft. The screen plates are inclined, and a plurality of screen holes and sawteeth are arranged on the screen plates. The inclined screen plates enable heavy materials on the screen plates to roll back and be recovered. The power device drives the eccentric reciprocating operation of the crankshaft, which drives the eight screen plates to move up and down in a staggered manner, so that the plastic film on the screen plates can move upward along the surface of the screen plates through the sawteeth on the screen plates. Through the initial separation of the spiral roller screen, the amount of materials entering the bounce screen is reduced, and the target materials processed by the bounce screen are more accurate, thereby improving the sorting quality of the bounce screen and reducing the frequency of maintenance of the bounce screen.

[0067] In the sorting line, the sorting room of the secondary sorting unit receives the material with a particle size of 50-180 mm screened by the spiral roller screen and the material with a particle size greater than 50 mm screened by the bounce screen. The sorting room is connected with the crushing and feeding yard through a belt conveyor. The sorting room includes a house body for providing a closed environment, a plurality of sorting stations and / or sorting devices arranged on the same side of the house body, and a sorting bin arranged on the outside of the house body and in communication with the bottom of the house body through a passage. The plurality of sorting stations and / or sorting devices are arranged on the same side of the belt conveyor along the conveying direction of the belt conveyor in the house body, and the sorting bin is arranged on the other side of the belt conveyor (i.e., opposite to the sorting stations and / or sorting devices). The passage corresponds to the plurality of sorting stations or sorting devices. The sorting room is a manual sorting room. In the implementation, five sorting stations are arranged, and workers are arranged at the sorting stations to pick out the material leaked from the belt conveyor and send the material into the sorting bin through the passage. Since the space in the sorting room is isolated from the space where the other devices in the production line are arranged, the quality of the working environment of the personnel or devices can be improved, dust and noise can be reduced, and the operation safety can be ensured. By arranging the sorting bin outside and the corresponding passage, the dust in the sorting room can be prevented from gathering, the quality of the working environment of the personnel or devices can be improved, the sorting efficiency and the operation convenience can be improved, and the material in the sorting bin can be conveniently recycled. The production line improves the sorting environment of the construction waste by arranging the sorting room and adopting the structure configuration of the single-side sorting station and / or sorting device layout and the opposite sorting bin, reduces the moving distance of the workers or devices, greatly improves the sorting efficiency and the operation convenience, improves the sorting efficiency by about 25-30%, improves the fine degree of separating the plastic film in the construction waste, and improves the recycling rate of the plastic film in the construction waste.

[0068] In the sorting line, the bar and flip-flow screen (combination of bar screen and flip-flow screen) of the secondary sorting unit is connected with the horizontal air separator and negative pressure air separator and the third stone powder stock yard through a belt conveyor. The bar and flip-flow screen is a conventional product purchased on the market. The bar and flip-flow screen screens the incoming material according to the particle size from large to small to form the fourth-level material entering the horizontal air separator, the fifth-level material entering the negative pressure air separator, and the sixth-level material entering the third stone powder stock yard. The particle size of the fourth-level material is greater than 30 mm, the particle size of the fifth-level material is between 8 mm and 30 mm, and the particle size of the sixth-level material is less than 8 mm.

[0069] In the sorting line: the third sorting unit includes a horizontal air separator and a negative pressure air separator. The fourth sorting unit includes a single-layer flip-flow screen for further sorting of the plastic film-containing material obtained from the horizontal air separator, and a manual sorting station arranged on the side of the belt conveyor between the horizontal air separator and the crushing and feeding stock yard. The single-layer flip-flow screen is connected with the crushing and feeding stock yard and the light material tailing stock yard respectively. The horizontal air separator separates the brick debris base mixture and the plastic film-containing material from the incoming material, the plastic film-containing material is discharged from the front end into the single-layer flip-flow screen, and the brick debris base mixture is discharged from the tail end and transported to the crushing and feeding stock yard by the belt conveyor (a manual sorting station is arranged in the middle of the belt conveyor, which is a two-person sorting station for further sorting of wood and PVC). The plastic film discharge port of the negative pressure air separator is connected with the light material bin, and the brick debris base mixture obtained from the negative pressure air separator is transported to the crushing and feeding stock yard by the belt conveyor. The screen aperture of the single-layer flip-flow screen is 8 mm, which is used for further cleaning and sorting of the plastic film-containing material to obtain powder and plastic film.

[0070] In the sorting line: the additional sorting unit includes a first magnetic separator for magnetic separation of the brick debris base mixture obtained from the sorting room, a second magnetic separator for magnetic separation of the material with a particle size greater than 30 mm after the second sorting, and a foam air separator for air separation of the material with a particle size less than 8 mm after the second sorting. The first magnetic separator and the second magnetic separator are used to select metal, wherein the first magnetic separator is arranged on the belt conveyor between the sorting room and the crushing and feeding stock yard, and the second magnetic separator is arranged on the belt conveyor between the rod strip flip-flow screen and the horizontal air separator. The foam air separator is used to select foam particles, and the foam air separator is arranged on the belt conveyor between the rod strip flip-flow screen and the third stone powder stock yard.

[0071] In the crushing line: the upper layer screen aperture of the double-layer vibrating screen is 40 mm, and the lower layer screen aperture is 16 mm. The jaw crusher is used for coarse crushing (crushing ratio 3-6), and the impact crusher is used for fine crushing, which are combined with the double-layer vibrating screen to form a closed circuit to ensure that the qualified rate of the aggregate particle size is ≥95%.

[0072] In the sorting line and the crushing line: atomizing equipment for spraying dust is arranged in the third stone powder stock yard, the crushing and feeding stock yard, the external stone stock yard, the stone stock yard, and the stone powder stock yard respectively.

[0073] Example Two

[0074] The embodiment provides a production method for fine processing of construction waste by using the above-mentioned production line for fine processing of construction waste. The method comprises the following steps:

[0075] S0, pre-sorting: the first excavator uniformly feeds the building waste to the plate chain feeder, while the first excavator's shovel bucket pre-sorts the building waste through the gap between the tines (i.e., large pieces of wood, large pieces of rubber, large pieces of nylon bags, net-shaped objects, stones with a particle size of more than 300 mm, bricks, concrete blocks, etc. will remain on the tines and be removed later, while the remaining small pieces of material and materials with a particle size of not more than 300 mm will fall through the gap between the tines to the plate chain feeder), and the plate chain feeder uniformly feeds the building waste to the spiral roller screen through the feeding belt. During the feeding process, the single-person manual sorting platform sorts the large pieces of wood, large pieces of rubber, large pieces of nylon bags, net-shaped objects, stones with a particle size of more than 300 mm, bricks, and concrete blocks that are missed during pre-sorting, to prevent the above materials from entering the system.

[0076] S1, primary sorting: the spiral roller screen classifies the building waste according to the size and specific gravity of the materials: materials with a particle size of more than 180 mm and containing plastic film are discharged laterally along the spiral blade and enter the bounce screen for further sorting, light materials and heavy materials with a particle size of 50 mm to 180 mm enter the spiral blade and are pushed to the front end of the spiral roller screen for discharge into the manual sorting room for sorting, and heavy materials with a particle size of less than 50 mm and containing plastic film enter the bar screen for further processing.

[0077] S2, secondary sorting: the bounce screen screens the materials with a particle size of more than 180 mm after primary sorting: heavy materials with a particle size of less than 50 mm enter the bar screen for processing, plastic film moves upward through the sawtooth on the screen plate and is transported to the light material tailing yard by the belt conveyor, and heavy materials with a particle size of more than 50 mm roll off the inclined screen plate surface and enter the manual sorting room for further sorting. The manual sorting room is equipped with five people to accurately sort the materials with a particle size of 50 mm to 180 mm after primary sorting and the materials with a particle size of more than 50 mm obtained from the bounce screen, to obtain plastic film, wood, PVC, and rubber. The remaining brick residue mixture is sent to the crushing and feeding yard by the belt conveyor, and the first magnetic separator is used to fully sort the residual metal on the belt conveyor during the conveying process. The brick residue mixture after sorting is continuously transported to the crushing and feeding yard by the belt conveyor. The bar screen divides the materials into three categories through the bar and the punched screen surface: materials with a particle size of more than 30 mm enter the horizontal air separator for processing, materials with a particle size of 8 mm to 30 mm are sent to the negative pressure air separator for processing, and stone powder and sand particles with a particle size of less than 8 mm are transported to the third stone powder storage yard by the belt conveyor. At the same time, the second magnetic separator is used to sort the residual metal during the conveying process of the materials with a particle size of more than 30 mm, and the foam air separator is used to sort the foam particles during the conveying process of the stone powder and sand particles with a particle size of less than 8 mm.

[0078] S3, tertiary sorting: the horizontal air separator is used for air separation of the material with particle size greater than 30 mm screened by the bar and rod flip screen, the light material containing plastic film selected is fed into the single-layer flip screen, and the remaining brick residue base mixture is transported to the crushing and feeding stockyard by the belt conveyor. The negative pressure air separator is used for negative pressure air separation of the material with particle size between 8 mm and 30 mm screened by the bar and rod flip screen, the selected plastic film is fed into a separate light material bin, and the remaining brick residue base mixture is transported to the crushing and feeding stockyard by the belt conveyor.

[0079] S4, fourth sorting: the brick residue base mixture and the material containing plastic film obtained by horizontal air separation are sorted respectively: the single-layer flip screen is used for further cleaning and sorting of the light material containing plastic film discharged from the front end of the horizontal air separator, the undersize material, i.e. the powder, is fed into the crushing and feeding stockyard, and the oversize material, i.e. the plastic film, is transported to the light material tailing stockyard by the belt conveyor; two sorting workstations are used for further sorting of the brick residue base mixture discharged from the tail end of the horizontal air separator and transported to the crushing and feeding stockyard by the belt conveyor, and wood and PVC are obtained.

[0080] S5, primary crushing: the second excavator loads the brick residue base mixture and the powder in the crushing and feeding stockyard to the vibrating feeder, and uniformly feeds them to the jaw crusher for primary crushing.

[0081] S6, vibration sorting: the double-layer vibration screen divides the material after primary and secondary crushing into three kinds: the material with particle size greater than 40 mm is fed into the impact crusher for secondary crushing by the belt conveyor (at the same time, the third magnetic separator installed on the belt conveyor magnetically separates and screens the residual metal during conveying), the material with particle size between 16 mm and 40 mm is fed into the air separation unit for treatment, and the stone and stone powder with particle size less than 16 mm are fed into the single-layer vibration screen for treatment.

[0082] S7, three-grade treatment: after the material is secondarily crushed by the impact crusher, the tailings are screened again by the double-layer vibration screen; at the same time, the air separation unit sorts the incoming material based on the specific gravity of the material, the selected plastic film is fed into the light material bin, and the selected stone is transported to the external stone stockyard by the belt conveyor; at the same time, the single-layer vibration screen separates the stone and stone powder in the incoming material through the 8 mm single-layer screen, the undersize stone powder is sent to the stone powder stockyard, and the oversize stone is sent to other stone stockyard; at the same time, the misting equipment is used for dust removal in the three-grade stone powder stockyard, the crushing and feeding stockyard, the external stone stockyard, the stone stockyard and the stone powder stockyard.

[0083] S8, water washing treatment: the plastic film obtained above enters a multi-stage shredding unit for multi-stage shredding, the plastic film after multi-stage shredding enters a separator for impurity separation, the plastic film after impurity separation enters a flushing pool for flushing, and the plastic film after flushing enters a dehydration and packaging system for final dehydration and packaging. In this process, the clean water required by the separator and the flushing pool is provided by a water circulation system, and the sewage generated by the separator, the flushing pool and the dehydration and packaging system enters the water circulation system for treatment to generate clean water, so as to circulate.

[0084] In the embodiment, the steps S1 to S4 and the steps S5 to S8 can be performed simultaneously, thereby significantly improving the processing efficiency.

[0085] The production method can finely process construction waste through "pre-separation + multi-stage screening + multi-stage air separation + three-stage magnetic separation + closed loop crushing + water washing", can more comprehensively and effectively separate construction waste to obtain plastic film, wood, PVC, rubber, metal, stone, stone powder, brick slag and foam, greatly improves the resource utilization rate, improves the material separation precision, improves the separation efficiency, and improves the production efficiency.

[0086] The embodiments of the present application are described above in combination with the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A construction waste fine processing production line, comprising a sorting line and a crushing line, characterized in that, The sorting line comprises: a pre-sorting unit for pre-sorting construction waste to remove unsuitable waste for treatment and sending the remaining material to a primary sorting unit; the primary sorting unit uses a spiral roller screen to screen the material according to particle size from large to small to form first-stage material entering a bounce screen, second-stage material entering a sorting room, and third-stage material entering a bar flip-flow screen; the secondary sorting unit comprises the bounce screen, the sorting room, and the bar flip-flow screen, plastic film is obtained through the bounce screen, plastic film, wood, PVC, rubber, and brick residue-based mixture are obtained through the sorting room, and the material is screened according to particle size from large to small through the bar flip-flow screen to form fourth-stage material entering a horizontal air separator, fifth-stage material entering a negative pressure air separator, and sixth-stage material being collected; the tertiary sorting unit comprises the horizontal air separator and the negative pressure air separator, brick residue-based mixture and material containing plastic film are obtained through the horizontal air separator, and brick residue-based mixture and plastic film are obtained through the negative pressure air separator; the quaternary sorting unit comprises a single-layer flip-flow screen for further sorting the material containing plastic film obtained by the horizontal air separator, and powder and plastic film are obtained through the single-layer flip-flow screen; the crushing line is used for further crushing, screening, magnetic separation, and air separation of the brick residue-based mixture and the powder obtained in the sorting line to obtain plastic film, stones, stone powder, and metal; the crushing line comprises: a jaw crusher for primary crushing of the brick residue-based mixture and the powder; a double-layer vibrating screen for screening the material after the primary crushing and the secondary crushing according to particle size from large to small to form material entering a counterattack crusher, material entering an air separation unit, and material entering a single-layer vibrating screen; the counterattack crusher for secondary crushing of the material; a third magnetic separator for magnetic separation of the material ready to enter the counterattack crusher to obtain metal; the air separation unit for air separation of the material to obtain plastic film and stones; the single-layer vibrating screen for re-screening of the material to obtain stones and stone powder.

2. The construction waste fine processing production line according to claim 1, characterized in that, The brick residue-based mixture and the powder obtained in the sorting line are stacked in a crushing and feeding yard; the crushing line further comprises: a second excavator for sending the material in the crushing and feeding yard to a vibrating feeder; the vibrating feeder for feeding the material to the jaw crusher.

3. The construction waste fine processing production line according to claim 1, characterized in that, The pre-sorting unit comprises: a first excavator for pre-sorting while shoveling, the first excavator comprises a shoveling bucket, and the shoveling bucket comprises at least two spaced tooth bars; a plate chain feeder for feeding the material after pre-sorting to the spiral roller screen; a manual sorting platform for removing unsuitable waste missed in the feeding process of the plate chain feeder.

4. The construction waste fine processing production line according to claim 1, characterized in that, The sorting room comprises: a room body for providing a closed environment; a plurality of sorting stations and / or sorting devices arranged on the same side in the room body for sorting the material entering the room body; a sorting bin for collecting sorted plastic film, wood, PVC, and rubber, the sorting bin is arranged outside the room body and is in communication with the bottom of the room body through a channel, and the sorting bin is arranged opposite to the sorting stations and / or sorting devices.

5. The construction waste fine processing production line according to claim 2, characterized in that, The fourth-stage sorting unit comprises a manual sorting station arranged between the horizontal air separator and the crushing and feeding yard, and the manual sorting station is used for sorting the brick-dust-based mixture obtained by the horizontal air separator to obtain wood and PVC.

6. The construction waste fine processing production line according to any one of claims 1 to 5, characterized in that, The sorting line further comprises an additional sorting unit, which comprises a first magnetic separator for performing magnetic separation on the brick-dust-based mixture obtained by the sorting room, a second magnetic separator for performing magnetic separation on the fourth-stage material, and a foam air separator for performing air separation on the sixth-stage material, wherein the first magnetic separator and the second magnetic separator are used to obtain metal, and the foam air separator is used to obtain foam particles.

7. The construction waste fine processing production line according to claim 1, characterized in that, The plastic film obtained in the sorting line and the crushing line is washed in a washing line; The washing line comprises: a multi-stage shredding unit for shredding the plastic film in multiple stages; a separator for separating impurities from the plastic film after the multiple-stage shredding; a flushing tank for flushing the plastic film after the impurity separation; a dehydration and packaging system for dehydrating and packaging the plastic film after the flushing; a water circulation system for recycling sewage from the separator, the flushing tank and the dehydration and packaging system, and providing recycled clean water to the separator and the flushing tank.

8. A production method of fine processing of construction waste using the production line for fine processing of construction waste according to any one of claims 1 to 7, characterized by, The method comprises the following steps: S0, pre-sorting: pre-sorting the construction waste to remove unsuitable waste, and sending the remaining material to a first-stage sorting unit; S1, first-stage sorting: using a spiral roller screen to screen the material according to particle size from large to small to form first-stage material entering a bounce screen, second-stage material entering a sorting room, and third-stage material entering a rod slack screen; S2, second-stage sorting: using the bounce screen to separate the incoming material to obtain plastic film; using the sorting room to separate the incoming material to obtain plastic film, wood, PVC, rubber, brick-dust-based mixture, and performing magnetic separation on the brick-dust-based mixture to obtain metal; using the rod slack screen to screen the incoming material according to particle size from large to small to form fourth-stage material entering a horizontal air separator, fifth-stage material entering a negative pressure air separator, and sixth-stage material being collected, and performing magnetic separation on the fourth-stage material to obtain metal and performing foam air separation on the sixth-stage material to obtain foam particles; S3, third-stage sorting: using the horizontal air separator to perform horizontal air separation on the incoming material to obtain brick-dust-based mixture and material containing plastic film; using the negative pressure air separator to perform negative pressure air separation on the incoming material to obtain brick-dust-based mixture and plastic film; S4, fourth-stage sorting: separately sorting the brick-dust-based mixture and the material containing plastic film obtained by the horizontal air separation to obtain wood, PVC, powder and plastic film; S5, crushing line processing: further crushing, screening, magnetic separation and air separation on the obtained brick-dust-based mixture and powder to obtain plastic film, stone, stone powder and metal.

9. The production method according to claim 8, characterized by, The steps of the crushing line processing comprise: S51, first-stage crushing: using a jaw crusher to perform first-stage crushing on the obtained brick-dust-based mixture and powder; S52, vibration sorting: using a double-layer vibration screen to screen the material after the first-stage crushing and the second-stage crushing according to particle size from large to small to form material entering a counterattack crusher, material entering an air separation unit, and material entering a single-layer vibration screen, and performing magnetic separation on the material ready to enter the counterattack crusher to obtain metal; S53, three-grade processing: using the counterattack crusher to carry out two-stage crushing on the incoming material; using the air separation unit to air separate the incoming material to obtain the plastic film and the stone; using the single-layer vibrating screen to screen the incoming material again to obtain the stone and the stone powder.

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