A high-efficiency sorting and processing system device for construction demolition waste and a system method thereof

Abstract

The application provides a building demolition garbage efficient sorting treatment system device and a system method thereof, the system device comprises a feeding module, a heavy screening module or a crushing screening module, the feeding module comprises a bidirectional conveying device, a first direction material outlet of the bidirectional conveying device is connected with a material inlet of the heavy screening module, a second direction material outlet of the bidirectional conveying device is connected with a material inlet of the crushing screening module, and a material outlet of the heavy screening module is connected with a material inlet of the crushing screening module. The system device and the system method have the advantages of strong material adaptability, high automation degree, large processing capacity, high sorting efficiency, stable production line operation, no blockage, and low maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building solid waste pretreatment and resource utilization, and relates to a building demolition waste sorting treatment system device and a system method thereof, in particular to a high-efficiency building demolition waste sorting treatment system device and a system method thereof. BACKGROUND

[0002] Building demolition waste is solid waste generated in the process of demolishing various buildings, structures, pipelines, bridges, etc., mainly containing concrete, bricks, ceramics, stone, metal iron, wood, plastic and other substances, which has the characteristics of large volume, much dust and difficult degradation, not only occupies a large amount of land resources and affects the city appearance, but also easily causes environmental secondary pollution. However, the recyclable components such as concrete brick aggregate, wood and metal iron in the building demolition waste account for a high proportion, and have great resource utilization properties. If the building demolition waste can be scientifically and reasonably treated and utilized, and the resource utilization and recycling of the building demolition waste are realized, it will bring great environmental, social and economic benefits to the development of the city, and has important significance in controlling environmental pollution, saving natural resources, energy and optimizing urban ecological environment.

[0003] The traditional building demolition waste is mainly processed by manual pre-sorting, crushing and screening equipment, and the processing method is relatively single. No targeted processing technology is adopted according to the complexity of the building demolition waste, and the impurities in the building demolition waste cannot be effectively removed. Especially for some mixed building demolition waste with complex components that are not well controlled at the source, the equipment adaptability is poor, resulting in high impurity content, uneven particle size, poor quality and low market acceptance of the recycled aggregate products, which seriously restricts the resource utilization of the building demolition waste. SUMMARY

[0004] To solve the technical problems in the prior art, the present application provides a high-efficiency building demolition waste sorting treatment system device and a system method thereof. The system device and the system method have strong material adaptability, high automation degree, large processing capacity, high sorting efficiency, stable production line operation, no blockage, low maintenance cost, low impurity content of the recycled aggregate products, high quality, and can be used as raw materials for brick making, concrete preparation, dry-mixed mortar and recycled water-stable material. The recycled products are rich in additional value, and the high-efficiency resource utilization and recycling application of the building demolition waste can be realized.

[0005] To achieve the above technical effects, the present application adopts the following technical solutions:

[0006] One of the purposes of the present application is to provide a high-efficiency sorting and processing system device for construction demolition waste, characterized in that the system device comprises a feeding module, a heavy screening module or a crushing screening module, the feeding module comprises a bidirectional conveying device, a first direction material outlet of the bidirectional conveying device is connected with a material inlet of the heavy screening module, a second direction material outlet of the bidirectional conveying device is connected with a material inlet of the crushing screening module, and a material outlet of the heavy screening module is connected with a material inlet of the crushing screening module.

[0007] In the present application, the system device can adjust the process route according to the content of impurities in the construction demolition waste, realize the opening of different impurity content construction demolition waste processing modes through the switching of the conveying direction of the bidirectional conveying device, realize the automatic adjustment between devices, and satisfy different impurity content construction demolition waste processing with one production line while each device is used scientifically and reasonably. When the incoming construction demolition waste has a low impurity content, a high-purity construction demolition waste processing mode is opened, and the system only needs to open the feeding module and the crushing screening module. When the incoming construction demolition waste has a high impurity content, a mixed construction demolition waste processing mode is opened, and the feeding module, the heavy screening module and the crushing screening module are opened at the same time. The heavy screening module can fully remove the impurities in the material to meet the high-efficiency sorting and processing requirements of the mixed construction demolition waste.

[0008] In the present application, the bidirectional conveying device can be a belt conveyor with forward and reverse functions. The material is conveyed to the crushing screening module through forward rotation, and the material is conveyed to the heavy screening module through reverse rotation. The specific conveying direction and the conveying relationship with the heavy screening module and the crushing screening module can be adjusted according to the requirements of the device and the process. The above cases are only simple examples.

[0009] As a preferred technical solution of the present application, the feeding module comprises a vibrating feeding device, a jaw crusher, a first magnetic separation device and a bidirectional conveying device connected in sequence.

[0010] Preferably, a screen above material outlet of the vibrating feeding device is connected with a material inlet of the jaw crusher, and a screen below material outlet of the vibrating feeding device is connected with a material inlet of the first magnetic separation device.

[0011] As a preferred technical solution of the present application, the heavy screening module comprises a heavy composite screening device, a magnetic separation unit, an air separation unit and a first manual sorting unit connected in sequence.

[0012] Preferably, the magnetic separation unit comprises a second magnetic separation device and a third magnetic separation device connected in parallel.

[0013] Preferably, the air separation unit comprises a first air separation device and a second air separation device connected in parallel.

[0014] As a preferred technical scheme of the present application, the sieve material outlet of the heavy compound screening device is connected with the material inlet of the second magnetic separation device.

[0015] Preferably, the sieve material outlet of the heavy compound screening device is connected with the material inlet of the third magnetic separation device.

[0016] Preferably, the material outlet of the second magnetic separation device is connected with the material inlet of the first air separation device.

[0017] Preferably, the material outlet of the third magnetic separation device is connected with the material inlet of the second air separation device.

[0018] Preferably, the heavy material outlet of the first air separation device and the heavy material outlet of the second air separation device are respectively and independently connected with the material inlet of the first manual sorting unit.

[0019] In the present application, the heavy material outlet of the first manual sorting unit is connected with the material inlet of the crushing and screening module.

[0020] As a preferred technical scheme of the present application, the crushing and screening module comprises a crushing device, a fourth magnetic separation device and a circular vibrating screening device connected in sequence.

[0021] Preferably, the crushing device is a counterattack crushing device.

[0022] As a preferred technical scheme of the present application, the circular vibrating screening device comprises a first material outlet, a second material outlet, a third material outlet and a fourth material outlet.

[0023] Preferably, the third material outlet is connected with the material inlet of a light material separation device.

[0024] Preferably, the fourth material outlet is connected with the material inlet of a second manual sorting unit.

[0025] Preferably, the high-purity material outlet of the second manual sorting unit is connected with the material inlet of the crushing device.

[0026] The second object of the present application is to provide a system and method for efficient sorting and processing of construction demolition waste.

[0027] When the construction demolition waste is low-impurity-content construction demolition waste, the construction demolition waste enters the crushing and screening module for crushing and screening through the bidirectional conveying device of the feeding device.

[0028] When the construction demolition waste is high-impurity-content construction demolition waste, the construction demolition waste enters a heavy screening module for impurity removal treatment through the bidirectional conveying device of the feeding device, and then enters the crushing and screening module for crushing and screening.

[0029] In the present application, low-impurity-content construction demolition waste refers to discarded materials generated in the demolition process of various buildings and structures, with impurity content less than 5%, and high-impurity-content construction demolition waste refers to discarded materials generated in the demolition process of various buildings and structures, with impurity content less than 30%.

[0030] As a preferred technical solution of the present application, when the construction demolition waste is low-impurity-content construction demolition waste, the system method comprises the following steps:

[0031] (1) The construction demolition waste enters the vibrating feeding device for feeding and screening treatment, the screened material enters the first magnetic separation device for first impurity removal treatment, and the screened material enters the jaw crusher for first crushing treatment and then enters the first magnetic separation device for first impurity removal treatment of magnetic impurities;

[0032] (2) The bidirectional conveying device conveys the material after the first impurity removal treatment in step (1) from the second direction to the crushing device of the crushing and screening module for second crushing treatment, to obtain crushed material;

[0033] (3) The crushed material in step (2) enters the fourth magnetic separation device for second impurity removal treatment, and then enters the circular vibrating screening device for screening, to obtain first, second, third and fourth particle size aggregates;

[0034] (4) The fourth particle size aggregate in step (3) enters the second manual sorting unit for sorting treatment, and then returns to the crushing device.

[0035] As a preferred technical solution of the present application, when the construction demolition waste is high-impurity-content construction demolition waste, the system method comprises the following steps:

[0036] (I) The construction demolition waste enters the vibrating feeding device for feeding and first screening treatment, the screened material enters the first magnetic separation device for first impurity removal treatment, and the screened material enters the jaw crusher for first crushing treatment and then enters the first magnetic separation device for first impurity removal treatment;

[0037] (II) The bidirectional conveying device conveys the material after the first impurity removal treatment in step (1) from the first direction to the heavy composite screening device of the heavy screening module for the second screening treatment. The material on the screen enters the second magnetic separation device and the first air separation device in sequence for the second impurity removal treatment. The material in the screen enters the third magnetic separation device and the second air separation device in sequence for the third impurity removal treatment. The material after the second impurity removal treatment and the third impurity removal treatment enters the first manual sorting unit for the first sorting treatment.

[0038] (III) Step (II) The heavy material after the first sorting process enters the crushing device of the crushing and screening module for a second crushing process to obtain crushed material;

[0039] (IV) After the crushed material described in step (III) enters the fourth magnetic separator for the fourth impurity removal process, it enters the circular vibrating screen for screening to obtain aggregates of the first, second, third and fourth particle sizes.

[0040] (V) After the fourth-sized aggregate described in step (IV) enters the second manual sorting unit for the second sorting process, it is returned to the crushing device.

[0041] As a preferred technical solution of the present invention, the particle size of the material after the first crushing treatment in steps (1) and (I) is less than 180mm, such as 170mm, 160mm, 150mm, 140mm, 130mm, 120mm, 110mm, 100mm, 90mm, 80mm, 70mm, 60mm or 50mm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0042] Preferably, in step (II), the particle size of the material in the sieve during the second screening process is 20-80 mm, such as 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm or 80 mm, and the particle size of the material on the sieve is 80-180 mm, such as 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm or 180 mm, but it is not limited to the listed values. Other unlisted values ​​within the above ranges are also applicable.

[0043] In this invention, the second screening process in the heavy-duty composite screening device also includes a 0-20mm undersize material which is a mixture of slag and soil, which can be directly transported to the corresponding slag and soil silo for temporary storage via a conveyor.

[0044] Preferably, the particle size of the first aggregate in step (3) and step (IV) is 0-5mm, the particle size of the second aggregate is 5-10mm, the particle size of the third aggregate is 10-31.5mm, and the particle size of the fourth aggregate is greater than 31.5mm.

[0045] The particle size of the first aggregate can be 0.5mm, 1mm, 2mm, 3mm, 4mm or 5mm, the particle size of the second aggregate can be 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, the particle size of the third aggregate can be 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm or 31.5mm, but not limited to the listed values, and other values not listed in the above ranges are also applicable.

[0046] In the present application, the number and particle size of the first, second, third and fourth aggregates in step (3) and step (IV) can be adjusted independently, and are not fixed values, which can be determined according to the actual construction project, and the above ranges are only for reference.

[0047] Preferably, the third aggregate in step (3) and step (IV) is subjected to impurity removal treatment in the light substance separation device.

[0048] In the present application, the first, second, third and fourth impurity removal treatments are independently carried out in the first, second, third and fourth magnetic separators, respectively, to separate magnetic metal impurities. The first and second air separation devices separate light mixed combustibles. The first and second manual sorting units are subjected to sorting treatment, respectively, to separate mixed combustibles and other materials such as wood and paper. The third aggregate is subjected to impurity removal treatment in the light substance separation device to separate mixed combustibles.

[0049] Compared with the prior art, the present application has at least the following beneficial effects:

[0050] (1) The building demolition waste efficient sorting treatment system provided by the present application realizes the opening of different impurity content building demolition waste treatment modes through the bypass path of the forward and reverse belt conveyor and the switching of the electrical control system, realizes the automatic adjustment between devices, and only one production line can meet the treatment needs of building demolition waste with different impurity contents, the equipment occupies smaller area, and the project engineering cost is reduced.

[0051] (2) The building demolition waste efficient sorting treatment system provided by the application is universally applicable to the treatment requirements of building demolition waste with different impurity contents in China, can realize efficient utilization of equipment, reduces system operation cost and labor cost, and has stable equipment operation and low failure rate, has better treatment effect on material crushing, sorting and screening, significantly improves system sorting efficiency, guarantees the quality of regenerated aggregate, and recycles and utilizes recyclable materials as much as possible, and realizes maximum resource utilization of building demolition waste.

[0052] (3) The entire system adopts integrated design, considers the production line equipment system, electrical control system, dust removal system and steel structure system, has smooth and smooth system process route, has strong adaptability, and is worthy of engineering popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 The structure schematic view of the building demolition waste efficient sorting treatment system device provided by the application example 2 is provided.

[0054] Figure 2 The flowchart of the building demolition waste efficient sorting treatment system method provided by the application example 1 is provided.

[0055] Figure 3 The flowchart of the building demolition waste efficient sorting treatment system method provided by the application example 2 is provided.

[0056] The application will be further described in detail. However, the following examples are only simple examples of the application, and do not represent or limit the protection scope of the application, and the protection scope of the application is subject to the claims. DETAILED DESCRIPTION

[0057] In order to better illustrate the application and facilitate understanding of the technical scheme of the application, the typical but non-limiting embodiments of the application are as follows:

[0058] Embodiment 1

[0059] The embodiment provides a building demolition waste efficient sorting treatment system device, which comprises a feeding module, a heavy screening module or a crushing and screening module, the feeding module comprises a bidirectional conveying device, a first direction material outlet of the bidirectional conveying device is connected with a material inlet of the heavy screening module, a second direction material outlet of the bidirectional conveying device is connected with a material inlet of the crushing and screening module, and a material outlet of the heavy screening module is connected with a material inlet of the crushing and screening module.

[0060] The feeding module comprises a vibration feeding device, a jaw crusher, a first magnetic separator and a bidirectional conveying device connected in sequence.

[0061] The screen-over material outlet of the vibrating feeder is connected with the material inlet of the jaw crusher, and the screen-under material outlet of the vibrating feeder is connected with the material inlet of the first magnetic separator;

[0062] The heavy-duty screening module comprises a heavy-duty composite screening device, a magnetic separation unit, an air separation unit and a first manual sorting unit connected in sequence, the magnetic separation unit comprises a second magnetic separation device and a third magnetic separation device connected in parallel, and the air separation unit comprises a first air separation device and a second air separation device connected in parallel;

[0063] The screen-over material outlet of the heavy-duty composite screening device is connected with the material inlet of the second magnetic separation device, the screen-under material outlet of the heavy-duty composite screening device is connected with the material inlet of the third magnetic separation device, the material outlet of the second magnetic separation device is connected with the material inlet of the first air separation device, the material outlet of the third magnetic separation device is connected with the material inlet of the second air separation device, and the heavy material outlet of the first air separation device and the heavy material outlet of the second air separation device are respectively and independently connected with the material inlet of the first manual sorting unit;

[0064] The crushing and screening module comprises a crushing device, a fourth magnetic separation device and a circular vibrating screening device connected in sequence, and the crushing device is a counterattack type crushing device;

[0065] The circular vibrating screening device comprises a first material outlet, a second material outlet, a third material outlet and a fourth material outlet, the third material outlet is connected with the material inlet of a light material separation device, the fourth material outlet is connected with the material inlet of a second manual sorting unit, and the high-purity material outlet of the second manual sorting unit is connected with the material inlet of the crushing device.

[0066] Embodiment 2

[0067] The embodiment provides a building demolition garbage efficient sorting and processing system device, which has the structure as shown in the figure. Figure 1 The system device comprises a feeding module, a heavy-duty screening module or a crushing and screening module, the feeding module comprises a forward-reverse belt conveyor, the reverse direction material outlet of the forward-reverse belt conveyor is connected with the material inlet of the heavy-duty screening module, the forward direction material outlet of the forward-reverse belt conveyor is connected with the material inlet of the crushing and screening module, and the material outlet of the heavy-duty screening module is connected with the material inlet of the crushing and screening module;

[0068] The feeding module comprises a vibrating feeder, a jaw crusher, a first magnetic separator and a forward-reverse belt conveyor connected in sequence;

[0069] The screen-over material outlet of the vibrating feeder is connected with the material inlet of the jaw crusher, and the screen-under material outlet of the vibrating feeder is connected with the material inlet of the first magnetic separator;

[0070] The heavy screening module comprises a heavy composite screening machine, a magnetic separation unit, an air separation unit and a first manual sorting room connected in sequence, the magnetic separation unit comprises a second magnetic separator and a third magnetic separator connected in parallel, and the air separation unit comprises a first air separator and a second air separator connected in parallel;

[0071] The screen-over material outlet of the heavy composite screening machine is connected with the material inlet of the second magnetic separator, the screen-under material outlet of the heavy composite screening machine is connected with the material inlet of the third magnetic separator, the material outlet of the second magnetic separator is connected with the material inlet of the first air separator, the material outlet of the third magnetic separator is connected with the material inlet of the second air separator, and the heavy material outlet of the first air separator and the heavy material outlet of the second air separator are respectively and independently connected with the material inlet of the first manual sorting room;

[0072] The crushing and screening module comprises a counter-attack crusher, a fourth magnetic separator and a circular vibrating screening machine connected in sequence;

[0073] The circular vibrating screening machine comprises a first material outlet, a second material outlet, a third material outlet and a fourth material outlet, the third material outlet is connected with the material inlet of a light material separator, the fourth material outlet is connected with the material inlet of a second manual sorting room, and the high-purity material outlet of the second manual sorting room is connected with the material inlet of the counter-attack crusher.

[0074] Application Example 1

[0075] The application example provides a kind of building demolition garbage efficient sorting processing system method, using the building demolition garbage efficient sorting processing system device provided in example 2, its flow as shown in Figure 2 The building demolition garbage processed in the application example is low-impurity-content building demolition garbage, and the source is the scrap generated in the demolition process of various buildings, structures and the like, and the impurity content is less than 5%.

[0076] The system method comprises the following steps:

[0077] (1) the building demolition garbage enters vibrating feeder for feeding and screening treatment, and the screen-under material enters the first magnetic separator for first impurity removal treatment to separate out magnetic iron material, and the screen-over material enters the jaw crusher for first crushing treatment to less than 180mm particle size, and then enters the first magnetic separator for first impurity removal treatment to separate out magnetic iron material;

[0078] (2) the forward-reverse belt conveyor transports the material after the first impurity removal treatment in step (1) from forward rotation to the impact crusher of the crushing and screening module for second crushing treatment to obtain crushed material;

[0079] (3) after the crushed material in step (2) enters the fourth magnetic separator for second impurity removal treatment to separate out magnetic iron material, it enters the circular vibrating screen for screening to obtain first particle size aggregate with a particle size of 0-5 mm, second particle size aggregate with a particle size of 5-10 mm, third particle size aggregate with a particle size of 10-31.5 mm, and fourth particle size aggregate with a particle size greater than 31.5 mm;

[0080] (4) after the fourth particle size aggregate in step (3) enters the second manual sorting room for sorting treatment to separate out mixed combustibles and wood, paper and other resource materials, it is returned to the impact crusher; the third aggregate enters the light material separator to separate out mixed combustibles, which can be used as building materials together with the first particle size aggregate and the second particle size aggregate.

[0081] Application Example 2

[0082] The application example provides a kind of building demolition garbage efficient sorting treatment system method, using the building demolition garbage efficient sorting treatment system device provided in application example 2, its flow as shown in Figure 3 Building demolition garbage processed in the present application is high-impurity-content building demolition garbage, which is generated in the process of demolishing various buildings, structures and the like, and the impurity content is less than 30%.

[0083] The system method comprises the following steps:

[0084] (I) the building demolition garbage enters the vibrating feeder for feeding and first screening treatment, the undersize material enters the first magnetic separator for first impurity removal treatment to separate out magnetic iron material, and the oversize material enters the jaw crusher for first crushing treatment and then enters the first magnetic separator for first impurity removal treatment to separate out magnetic iron material;

[0085] (II) the forward-reverse belt conveyor transports the material after the first impurity removal treatment in step (1) from reverse rotation to the heavy-duty composite screen of the heavy-duty screening module for second screening treatment, the oversize material with a particle size of 80-180 mm enters the second magnetic separator and the first air separator in sequence for second impurity removal treatment to separate out magnetic iron material and mixed combustibles, the middle-size material with a particle size of 20-80 mm enters the third magnetic separator and the second air separator in sequence for third impurity removal treatment to separate out magnetic iron material and mixed combustibles, and the undersize material with a particle size of 0-20 mm is a residue mixture; the material after the second impurity removal treatment and the third impurity removal treatment enters the first manual sorting room for first sorting treatment to separate out mixed combustibles and wood, paper and other resource materials;

[0086] (III) The heavy material after the first sorting treatment of step (II) enters the impact crusher of the crushing and screening module for a second crushing treatment to obtain a crushed material;

[0087] (IV) After the fourth impurity removal treatment of the crushed material of step (III) by the fourth magnetic separator, the magnetic iron material is separated out and enters the circular vibrating screen for screening to obtain a first particle size aggregate with a particle size of 0-5 mm, a second particle size aggregate with a particle size of 5-10 mm, a third particle size aggregate with a particle size of 10-31.5 mm, and a fourth particle size aggregate with a particle size greater than 31.5 mm;

[0088] (V) After the fourth particle size aggregate of step (IV) is sorted by the second artificial sorting room, mixed combustibles and wood, paper and other resources are separated out and returned to the impact crusher; the third aggregate enters the light material separator to separate out mixed combustibles, which can be used as building materials together with the first particle size aggregate and the second particle size aggregate.

[0089] After the efficient sorting treatment of the building demolition waste in application examples 1 and 2, the recycled aggregate, mixed combustibles, slag mixture, magnetic iron material and wood, paper and other resources are separated out, and the proportions of the above materials are shown in Table 1.

[0090] Table 1: Types and proportions of end products after efficient sorting treatment of building demolition waste

[0091]

[0092]

[0093] As can be seen from the test results in Table 1, the building demolition waste efficient sorting treatment system device provided in examples 1 and 2 and the building demolition waste efficient sorting treatment system method provided in application examples 1 and 2 can sort the building demolition waste into recycled aggregate, mixed combustibles, slag mixture, magnetic iron material and wood, paper and other resources, and realize efficient sorting and resource utilization of building demolition waste.

[0094] The applicant declares that the above examples are used to illustrate the detailed structural features of the present application, but the present application is not limited to the above detailed structural features, i.e. it does not mean that the present application must rely on the above detailed structural features to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of the components selected by the present application, addition of auxiliary components, selection of specific methods, etc. fall within the scope of protection and disclosure of the present application.

[0095] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details of the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0096] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0097] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed by the present application.

Claims

1. A building demolition waste efficient sorting treatment system device, characterized in that, The system device comprises a feeding module, a heavy screening module and a crushing screening module, the feeding module comprises a vibrating feeding device, a jaw crusher, a first magnetic separation device and a bidirectional conveying device connected in sequence, the first direction material outlet of the bidirectional conveying device is connected with the material inlet of the heavy screening module, the second direction material outlet of the bidirectional conveying device is connected with the material inlet of the crushing screening module, and the material outlet of the heavy screening module is connected with the material inlet of the crushing screening module; The screen above material outlet of the vibrating feeding device is connected with the material inlet of the jaw crusher, and the screen below material outlet of the vibrating feeding device is connected with the material inlet of the first magnetic separation device; The heavy screening module comprises a heavy composite screening device, a magnetic separation unit, an air separation unit and a first manual sorting unit connected in sequence; the magnetic separation unit comprises a second magnetic separation device and a third magnetic separation device connected in parallel; the air separation unit comprises a first air separation device and a second air separation device connected in parallel; The screen above material outlet of the heavy composite screening device is connected with the material inlet of the second magnetic separation device, the screen middle material outlet of the heavy composite screening device is connected with the material inlet of the third magnetic separation device, the material outlet of the second magnetic separation device is connected with the material inlet of the first air separation device, the material outlet of the third magnetic separation device is connected with the material inlet of the second air separation device, and the heavy material outlet of the first air separation device and the heavy material outlet of the second air separation device are respectively and independently connected with the material inlet of the first manual sorting unit; The crushing screening module comprises a crushing device, a fourth magnetic separation device and a circular vibrating screening device connected in sequence; the circular vibrating screening device comprises a first material outlet, a second material outlet, a third material outlet and a fourth material outlet; the third material outlet is connected with the material inlet of a light material separation device, and the fourth material outlet is connected with the material inlet of a second manual sorting unit; the high-purity material outlet of the second manual sorting unit is connected with the material inlet of the crushing device; When the construction demolition waste is low-impurity-content construction demolition waste, the construction demolition waste enters the crushing screening module for crushing and screening through the bidirectional conveying device of the feeding module; When the construction demolition waste is high-impurity-content construction demolition waste, the construction demolition waste enters the crushing screening module for crushing and screening after being treated by the heavy screening module.

2. The system of claim 1, wherein, The crushing device is a counterattack type crushing device.

3. A method for efficient sorting of construction demolition waste, characterized in that, The system method uses the system device of claim 1 or 2.

4. The system method of claim 3, wherein, When the construction demolition waste is low-impurity-content construction demolition waste, the system method comprises the following steps: (1) the construction demolition waste enters the vibrating feeding device for feeding and screening treatment, the screen below material enters the first magnetic separation device for first impurity removal treatment, and the screen above material enters the jaw crusher for first crushing treatment and then enters the first magnetic separation device for first impurity removal treatment; (2) the bidirectional conveying device conveys the material after the first impurity removal treatment in step (1) from the second direction to the crushing device of the crushing and screening module for second crushing treatment, to obtain crushed material; (3) the crushed material in step (2) enters the fourth magnetic separation device for second impurity removal treatment, and then enters the circular vibrating screening device for screening, to obtain first particle size aggregate, second particle size aggregate, third particle size aggregate and fourth particle size aggregate; (4) the fourth particle size aggregate in step (3) enters the second manual sorting unit for sorting treatment, and then returns to the crushing device.

5. The system method of claim 4, wherein, When the construction demolition waste is high-impurity-content construction demolition waste, the system and method comprises the following steps: (I) the construction demolition waste enters the vibrating feeding device for feeding and first screening treatment, the undersize material enters the first magnetic separation device for first impurity removal treatment, and the oversize material enters the jaw crusher for first crushing treatment and then enters the first magnetic separation device for first impurity removal treatment; (II) the bidirectional conveying device conveys the material after the first impurity removal treatment in step (1) from the first direction to the heavy composite screening device of the heavy screening module for second screening treatment, the oversize material sequentially enters the second magnetic separation device and the first air separation device for second impurity removal treatment, the middle-size material sequentially enters the third magnetic separation device and the second air separation device for third impurity removal treatment, and the material after the second impurity removal treatment and the third impurity removal treatment enters the first manual sorting unit for first sorting treatment; (III) the heavy material after the first sorting treatment in step (II) enters the crushing device of the crushing and screening module for second crushing treatment, to obtain crushed material; (IV) the crushed material in step (III) enters the fourth magnetic separation device for fourth impurity removal treatment, and then enters the circular vibrating screening device for screening, to obtain first particle size aggregate, second particle size aggregate, third particle size aggregate and fourth particle size aggregate; (V) the fourth particle size aggregate in step (IV) enters the second manual sorting unit for second sorting treatment, and then returns to the crushing device.

6. The system method of claim 5, wherein, The particle size of the material after the first crushing treatment in step (1) and step (I) is less than 180 mm.

7. The system method of claim 5, wherein, In the second screening treatment in step (II), the particle size of the middle-size material is 20-80 mm, and the particle size of the oversize material is 80-180 mm.

8. The system method of claim 5, wherein, In step (3) and step (IV), the particle size of the first particle size aggregate is 0-5 mm, the particle size of the second particle size aggregate is 5-10 mm, the particle size of the third particle size aggregate is 10-31.5 mm, and the particle size of the fourth particle size aggregate is greater than 31.5 mm.

9. The system method of claim 5, wherein, The third particle size aggregate in step (3) and step (IV) enters the light material separation device for impurity removal treatment.

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