CN116474914A - A high-efficiency sorting and processing system device and system method for construction demolition waste - Google Patents

Abstract

The present invention provides a high-efficiency sorting and processing system device for construction demolition waste and a system method thereof. The system device includes a feeding module, a heavy-duty screening module or a crushing and screening module. The feeding module includes a two-way conveying device. The first-direction material outlet of the two-way conveying device is connected to the material inlet of the heavy-duty screening module, the second-direction material outlet of the two-way conveying device is connected to the material inlet of the crushing and screening module, and the material outlet of the heavy-duty screening module is connected to the material inlet of the crushing and screening module. The system device and system method have strong material adaptability, high degree of automation, large processing capacity, high sorting efficiency, stable production line operation, no jamming, and low repair and maintenance costs.

Description

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

technical field

The invention belongs to the technical field of construction solid waste pretreatment and resource utilization, and relates to a construction demolition waste sorting and processing system device and a system method thereof, in particular to a construction demolition waste high-efficiency sorting and processing system device and a system method thereof.

Background technique

Construction demolition waste is solid waste generated during the demolition process of various buildings (structures), pipe networks, roads and bridges, etc. It mainly contains concrete, bricks, ceramics, stone, metal iron, wood, plastic and other substances. The scientific and reasonable treatment and utilization of construction demolition waste, and the realization of resource utilization and recycling of construction demolition waste will bring huge environmental, social and economic benefits to the development of the city. It is of great significance in controlling environmental pollution, saving natural resources, energy, and optimizing the urban ecological environment.

Traditional construction demolition waste mainly uses manual pre-sorting, crushing and screening equipment for simple processing. The method is relatively simple, and no targeted treatment process is adopted for the complexity of construction demolition waste. Impurities in construction demolition waste cannot be effectively removed, especially for some mixed construction demolition waste that has not been properly controlled at the source.

Contents of the invention

In order to solve the technical problems existing in the prior art, the present invention provides a high-efficiency sorting and processing system device and system method for construction demolition waste. The system device and system method have strong material adaptability, high degree of automation, large processing capacity, high sorting efficiency, stable production line operation, no jamming, low repair and maintenance costs, and the obtained recycled aggregate products have low impurity content and high quality. Recycle for reuse.

In order to achieve the above technical effects, the present invention adopts the following technical solutions:

One of the objects of the present invention is to provide a system device for efficient sorting and processing of construction demolition waste, wherein the system device includes a feeding module, a heavy-duty screening module or a crushing and screening module, the feeding module includes a two-way conveying device, the first direction material outlet of the two-way conveying device is connected to the material inlet of the heavy-duty screening module, the second-direction material outlet of the two-way conveying device is connected to the material inlet of the crushing and screening module, and the material outlet of the heavy-duty screening module is connected to the material inlet of the crushing and screening module.

In the present invention, the system device can adjust the process route according to the content of impurities in the construction demolition waste, and through the switching of the conveying direction of the two-way conveying device, the opening of the construction demolition waste treatment mode with different impurity content can be realized, and the automatic adjustment between equipment can be realized. A production line can meet the requirements of different impurity content for construction demolition waste treatment, and at the same time, each equipment can be used scientifically and rationally. The feeding module, heavy-duty screening module and crushing and screening module are opened at the same time. The heavy-duty screening module fully removes impurities in the material to meet the needs of efficient sorting and processing of mixed construction demolition waste.

In the present invention, the two-way conveying device may be a belt conveyor with forward and reverse functions, through forward rotation, the material can be transported to the crushing and screening module, and through reverse rotation, the material can be transported to the heavy screening module. The specific transmission direction and the transmission relationship with the heavy-duty screening module and the crushing and screening module can be adjusted according to the requirements of the device and the process. The above situation is just a simple example.

As a preferred technical solution of the present invention, the feeding module includes a vibrating feeding device, a jaw crushing device, a first magnetic separation device and a two-way conveying device connected in sequence.

Preferably, the oversize material outlet of the vibrating feeding device is connected to the material inlet of the jaw crushing device, and the undersize material outlet of the vibrating feeding device is connected to the material inlet of the first magnetic separation device.

As a preferred technical solution of the present invention, the heavy-duty screening module includes a heavy-duty compound screening device, a magnetic separation unit, a winnowing unit and a first manual sorting unit connected in sequence.

Preferably, the magnetic separation unit includes a second magnetic separation device and a third magnetic separation device connected in parallel.

Preferably, the winnowing unit includes a first winnowing device and a second winnowing device connected in parallel.

As a preferred technical solution of the present invention, the oversized material outlet of the heavy-duty compound screening device is connected with the material inlet of the second magnetic separation device.

Preferably, the screened material outlet of the heavy-duty compound screening device is connected to the material inlet of the third magnetic separation device.

Preferably, the material outlet of the second magnetic separation device is connected to the material inlet of the first air separation device.

Preferably, the material outlet of the third magnetic separation device is connected to the material inlet of the second wind separation device.

Preferably, the heavy material outlet of the first winnowing device and the heavy material outlet of the second winnowing device are independently connected to the material inlet of the first manual sorting unit.

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

As a preferred technical solution of the present invention, the crushing and screening module includes a crushing device, a fourth magnetic separation device and a circular vibration screening device connected in sequence.

Preferably, the crushing device is an impact crushing device.

As a preferred technical solution of the present invention, the circular vibration screening device includes a first material outlet, a second material outlet, a third material outlet and a fourth material outlet.

Preferably, the third material outlet is connected to the material inlet of the light matter separation device.

Preferably, the fourth material outlet is connected to the material inlet of the second manual sorting unit.

Preferably, the high-purity material outlet of the second manual sorting unit is connected to the material inlet of the crushing device.

The second object of the present invention is to provide a system method for efficient sorting and processing of construction demolition waste, and the system method uses any one of the system devices described above;

When the construction demolition waste is construction demolition waste with low impurity content, the construction demolition waste enters the crushing and screening module through the two-way conveying device of the feeding device for crushing and screening;

When the construction demolition waste is construction demolition waste with high impurity content, the construction demolition waste enters the heavy-duty screening module through the two-way conveying device of the feeding device for impurity removal treatment, and then enters the crushing and screening module for crushing and screening.

In the present invention, the construction demolition waste with low impurity content refers to the discarded materials produced in the demolition process of various buildings and structures, and the impurity content is less than 5%, and the construction demolition waste with high impurity content refers to the discarded materials produced in the demolition process of various buildings and structures, and the impurity content is less than 30%.

As a preferred technical solution of the present invention, when the construction demolition waste is construction demolition waste with low impurity content, the system method includes the following steps:

(1) The construction demolition waste enters the vibrating feeding device for feeding and screening, the under-screen material enters the first magnetic separation device for the first impurity removal treatment, and the over-screen material enters the jaw crusher for the first crushing treatment and then enters the first magnetic separation device for the first magnetic impurity removal treatment;

(2) The two-way conveying device transports 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 the second crushing treatment to obtain the crushed material;

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

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

As a preferred technical solution of the present invention, when the construction demolition waste is construction demolition waste with high impurity content, the system method includes the following steps:

(1) described construction demolition waste enters vibrating feeding device and carries out feeding and first screening process, and material under the screen enters first magnetic separation device and carries out first impurity removal process, and material on the screen enters jaw crusher and carries out first crushing process and then enters described first magnetic separation device and carries out first impurity removal process;

(II) The two-way conveying device transports the material after the first impurity removal treatment in step (1) from the first direction to the heavy-duty composite screening device of the heavy-duty screening module for the second screening process, the screened material enters the second magnetic separation device and the first air separation device for the second impurity removal process, the screened material enters the third magnetic separation device and the second air separation device for the third impurity removal process, and the second impurity removal process and the material after the third impurity removal process enter the first manual sorting unit for the first sorting process;

(III) The heavy material after the first sorting process in step (II) enters the crushing device of the crushing and screening module for a second crushing process to obtain crushed materials;

(IV) After the crushed material in step (III) enters the fourth magnetic separation device for the fourth impurity removal treatment, it enters the circular vibrating screening device for screening to obtain aggregates of the first particle size, aggregates of the second particle size, aggregates of the third particle size and aggregates of the fourth particle size;

(V) The aggregate with the fourth particle size in step (IV) enters the second manual sorting unit for the second sorting process, and then returns to the crushing device.

As a preferred technical solution of the present invention, the particle diameter of the material after the first crushing treatment described in step (1) and step (1) is less than 180mm, such as 170mm, 160mm, 150mm, 140mm, 130mm, 120mm, 110mm, 100mm, 90mm, 80mm, 70mm, 60mm or 50mm, etc., but it is not limited to the listed values, and other unlisted values in the range of values are also applicable.

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

In the present invention, the second screening process performed in the heavy-duty compound screening device also includes that the 0-20mm undersize is a muck mixture, which can be directly transported to the corresponding muck bin by a conveyor for temporary storage.

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

Wherein, the particle diameter of the first aggregate can be 0.5mm, 1mm, 2mm, 3mm, 4mm or 5mm, etc., the particle diameter of the second aggregate can be 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc., and the particle diameter of the third aggregate can be 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm or 31.5mm, etc., but are not limited to the listed values. Other unrecited values within the respective value ranges also apply.

In the present invention, the number of types and particle sizes of the first particle size aggregate, the second particle size aggregate, the third particle size aggregate, and the fourth particle size aggregate described in step (3) and step (IV) can be adjusted independently, and are not fixed values. The specific values may depend on the actual construction project, and the above range is for reference only.

Preferably, the third aggregate in step (3) and step (IV) enters the light matter separation device for impurity removal treatment.

In the present invention, the first impurity removal treatment, the second impurity removal treatment, the third impurity removal treatment and the fourth impurity removal treatment are independently carried out in the first magnetic separator, the second magnetic separator, the third magnetic separator and the fourth magnetic separator to separate magnetic metal impurities. The light mixed combustibles are sorted out by the first winnowing device and the second winnowing device. The first manual sorting unit and the second manual sorting unit perform sorting processing respectively, and sort out mixed combustibles and other materials such as wood and paper. The third aggregate enters the light matter separation device for impurity removal treatment, and the mixed combustibles are separated.

Compared with the prior art, the present invention has at least the following beneficial effects:

(1) A high-efficiency sorting and processing system for construction demolition waste proposed by the present invention, through the setting of the bypass path of the forward and reverse belt conveyor and the switching of the electrical control system, the opening of the construction demolition waste treatment mode with different trash content is realized, and the automatic adjustment between equipment is realized. Only one production line can meet the processing requirements of construction demolition waste with different trash content, the equipment occupies a smaller area, and the project cost is reduced;

(2) The high-efficiency sorting and processing system for construction demolition waste proposed by the present invention is generally applicable to the processing needs of construction demolition waste with different impurity rates in China. It can realize efficient utilization of equipment, reduce system operating costs and labor costs, and have more stable equipment operation and low failure rate. It has better processing effects on material crushing, sorting, and screening.

(3) The whole system adopts an integrated design, considering the production line equipment system, electrical control system, dust removal system, and steel structure system together. The system process route is smoother and more adaptable, and it is worthy of engineering promotion and application.

Description of drawings

Fig. 1 is the structural schematic diagram of the high-efficiency sorting and processing system device for construction demolition waste provided by Embodiment 2 of the present invention;

Fig. 2 is a schematic flow diagram of the construction demolition waste efficient sorting and processing system method provided by Application Example 1 of the present invention;

Fig. 3 is a schematic flowchart of the system method for efficient sorting and processing of construction demolition waste provided by Application Example 2 of the present invention.

The present invention will be further described in detail below. However, the following examples are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention shall be determined by the claims.

Detailed ways

For better illustrating the present invention, facilitate understanding technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:

Example 1

This embodiment provides a high-efficiency sorting and processing system device for construction demolition waste. The system device includes a feeding module, a heavy-duty screening module or a crushing and screening module. The feeding module includes a two-way conveying device. The first direction material outlet of the two-way conveying device is connected to the material inlet of the heavy-duty screening module.

The feeding module includes a vibrating feeding device, a jaw crushing device, a first magnetic separation device and a two-way conveying device connected in sequence;

The over-screen material outlet of the vibrating feeding device is connected to the material inlet of the jaw crushing device, and the under-screen material outlet of the vibrating feeding device is connected to the material inlet of the first magnetic separator;

The heavy-duty screening module includes a heavy-duty composite screening device, a magnetic separation unit, a wind separation unit and a first manual sorting unit connected in sequence, the magnetic separation unit includes a parallel second magnetic separation device and a third magnetic separation device, and the wind separation unit includes a parallel first wind separation device and a second wind separation device;

The material outlet on the screen of the heavy-duty composite screening device is connected with the material inlet of the second magnetic separation device, the 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 wind separation device, the material outlet of the third magnetic separation device is connected with the material inlet of the second wind separation device, the heavy material material outlet of the first wind separation device and the heavy material material outlet of the second wind separation device are independently connected with the material inlet of the first manual sorting unit;

The crushing and screening module includes a crushing device, a fourth magnetic separation device and a circular vibration screening device connected in sequence, and the crushing device is an impact crushing device;

The circular vibration screening device includes a first material outlet, a second material outlet, a third material outlet and a fourth material outlet, the third material outlet is connected to the material inlet of the light matter separation device, the fourth material outlet is connected to the material inlet of the second manual sorting unit, and the high-purity material outlet of the second manual sorting unit is connected to the material inlet of the crushing device.

Example 2

The present embodiment provides a system device for high-efficiency sorting and processing of construction demolition waste. Its structure is as shown in Figure 1. The system device includes a feeding module, a heavy-duty screening module or a crushing and screening module. The feeding module includes a forward and reverse belt conveyor. The reverse direction material outlet of the forward and reverse belt conveyor is connected to the material inlet of the heavy-duty screening module. The forward-rotation material outlet of the forward and reverse belt conveyor is connected to the material inlet of the crushing and screening module, and the material outlet of the heavy-duty screening module is connected to the material inlet of the crushing and screening module;

The feeding module includes a vibrating feeder, a jaw crusher, a first magnetic separator and a forward and reverse belt conveyor connected in sequence;

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

The heavy-duty screening module includes a heavy-duty compound screening machine, a magnetic separation unit, a winnowing unit and a first manual sorting room connected in sequence, the magnetic separation unit includes a parallel second magnetic separator and a third magnetic separator, and the winnowing unit includes a parallel first winnowing machine and a second winnowing machine;

The material outlet on the screen of the heavy-duty composite screening machine is connected to the material inlet of the second magnetic separator, the material outlet in the screen of the heavy-duty composite screening machine is connected to the material inlet of the third magnetic separator, the material outlet of the second magnetic separator is connected to the material inlet of the first air separator, the material outlet of the third magnetic separator is connected to the material inlet of the second air separator, and the heavy material material outlet of the first air separator and the heavy material outlet of the second air separator are independently connected to the material inlet of the first manual sorting room;

The crushing and screening module includes an impact crusher, a fourth magnetic separator and a circular vibration screening machine connected in sequence;

The circular vibration screening machine includes a first material outlet, a second material outlet, a third material outlet and a fourth material outlet, the third material outlet is connected to the material inlet of the light matter separator, the fourth material outlet is connected to the material inlet of the second manual sorting room, and the high-purity material outlet of the second manual sorting room is connected to the material inlet of the impact crusher.

Application example 1

This application example provides a system method for efficient sorting and processing of construction demolition waste. The high-efficiency separation and processing system device for construction demolition waste provided in Example 2 is used. The process flow is shown in Figure 2. The construction demolition waste processed in this application example is construction demolition waste with low impurity content.

The system method includes the steps of:

(1) The construction demolition waste enters the vibrating feeder for feeding and screening, the under-screen material enters the first magnetic separator for the first impurity removal process to separate the magnetic iron material, and the screened material enters the jaw crusher for the first crushing process until the particle size of the material is less than 180 mm, then enters the first magnetic separator for the first impurity removal process to separate the magnetic iron material;

(2) The reversing belt conveyor transfers the material after the first impurity removal treatment in step (1) from the forward direction to the impact crusher of the crushing and screening module for the second crushing process to obtain the crushed material;

(3) The crushed material in step (2) enters the fourth magnetic separator for the second impurity removal treatment to separate the magnetic iron material, and then enters the circular vibration screening machine for screening to obtain aggregates with a first particle size of 0-5 mm, aggregates with a second particle size of 5-10 mm, aggregates with a third particle size of 10-31.5 mm, and aggregates with a fourth particle size greater than 31.5 mm;

(4) The aggregate with the fourth particle size in step (3) enters the second manual sorting room for sorting and processing to separate the mixed combustibles and resources such as wood and paper, and then returns to the impact crusher; the third aggregate enters the light matter separator to separate the mixed combustibles, and can be used as building materials with the aggregates of the first particle size and the second particle size.

Application example 2

This application example provides an efficient sorting and processing system method for construction demolition waste, using the construction demolition waste high-efficiency sorting and processing system device provided in Example 2. The process is shown in Figure 3. The construction demolition waste processed in this application example is construction demolition waste with high impurity content.

The system method includes the steps of:

(1) the building demolition waste enters the vibrating feeder for feeding and the first screening process, the under-screen material enters the first magnetic separator and carries out the first impurity removal process to separate the magnetic iron material, and the material on the screen enters the jaw crusher for the first crushing process and then enters the first magnetic separator to carry out the first impurity removal process to separate the magnetic iron material;

(II) The reversing belt conveyor transports the material after the first impurity removal treatment in step (1) from the reverse direction to the heavy-duty compound screening machine of the heavy-duty screening module for the second screening process. The material on the screen with a particle size of 80-180 mm enters the second magnetic separator and the first air separator for the second impurity removal process to separate the magnetic iron material and mixed combustibles. The undersieve with a particle size of 0-20mm is a mixture of muck and soil, and the materials after the second impurity removal treatment and the third impurity removal treatment enter the first manual sorting room for the first sorting process to separate mixed combustibles and resources such as wood and paper;

(III) The heavy material after the first sorting process in step (II) enters the impact crusher of the crushing and screening module for a second crushing process to obtain crushed materials;

(IV) The crushed material in step (III) enters the fourth magnetic separator for the fourth impurity removal treatment to separate the magnetic iron material, and then enters the circular vibration screening machine for screening to obtain aggregates with a first particle size of 0 to 5 mm, aggregates with a second particle size of 5 to 10 mm, aggregates with a third particle size of 10 to 31.5 mm, and aggregates with a fourth particle size greater than 31.5 mm;

(V) The aggregate with the fourth particle size in step (IV) enters the second manual sorting room for sorting and processing to separate the mixed combustibles and resource materials such as wood and paper, and then returns to the impact crusher; the third aggregate enters the light matter separator to separate the mixed combustibles, and can be used as building materials with the aggregates of the first particle size and the second particle size.

Application Example 1 and Application Example 2 After efficient sorting of construction demolition waste, recycled aggregates, mixed combustibles, muck mixture, magnetic iron materials, wood, paper and other resources are obtained. The proportions of the above materials are shown in Table 1.

Table 1 Types and proportions of terminal products after efficient sorting and treatment of construction demolition waste

It can be seen from the test results in Table 1 that the construction demolition waste high-efficiency sorting and processing system device provided in Examples 1 and 2 and the construction demolition waste high-efficiency sorting and processing system method provided in Application Examples 1 and 2 can sort construction demolition waste into recycled aggregates, mixed combustibles, slag-soil mixtures, magnetically separated iron materials, wood, paper and other resources, and realize efficient sorting and resource utilization of construction demolition waste.

The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of selected components in the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific details in the above-mentioned embodiment. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (10)

1. A construction demolition garbage efficient sorting and processing system device, characterized in that, the system device includes a feeding module, a heavy-duty screening module or a crushing and screening module, the feeding module includes a two-way conveying device, the first direction material outlet of the two-way conveying device is connected with the material inlet of the described heavy-duty screening module, the second direction material outlet of the two-way conveying device 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. 2. The system device according to claim 1, wherein the feeding module includes a vibrating feeding device, a jaw crushing device, a first magnetic separation device and a two-way conveying device connected in sequence; Preferably, the oversize material outlet of the vibrating feeding device is connected to the material inlet of the jaw crushing device, and the undersize material outlet of the vibrating feeding device is connected to the material inlet of the first magnetic separation device. 3. According to the system device described in claim 1 or 2, it is characterized in that the heavy-duty screening module includes a heavy-duty compound screening device, a magnetic separation unit, a winnowing unit and a first manual sorting unit connected in sequence; Preferably, the magnetic separation unit includes a second magnetic separation device and a third magnetic separation device connected in parallel; Preferably, the winnowing unit includes a first winnowing device and a second winnowing device connected in parallel. 4. The system device according to claim 3, wherein the material outlet on the screen of the heavy-duty composite screening device is connected to the material inlet of the second magnetic separation device; Preferably, the material outlet in the screen of the heavy-duty compound screening device is connected to the material inlet of the third magnetic separation device; Preferably, the material outlet of the second magnetic separation device is connected to the material inlet of the first wind separation device; Preferably, the material outlet of the third magnetic separation device is connected to the material inlet of the second wind separation device; Preferably, the heavy material outlet of the first winnowing device and the heavy material outlet of the second winnowing device are independently connected to the material inlet of the first manual sorting unit. 5. The system device according to any one of claims 1-4, wherein the crushing and screening module includes a crushing device, a fourth magnetic separation device and a circular vibration screening device connected in sequence; Preferably, the crushing device is an impact crushing device. 6. The system device according to claim 5, wherein the circular vibration screening device comprises a first material outlet, a second material outlet, a third material outlet and a fourth material outlet; Preferably, the third material outlet is connected to the material inlet of the light matter separation device; Preferably, the fourth material outlet is connected to the material inlet of the second manual sorting unit; Preferably, the high-purity material outlet of the second manual sorting unit is connected to the material inlet of the crushing device. 7. A system method for efficient sorting and processing of construction demolition waste, characterized in that the system method uses the system device described in any one of claims 1-6; When the construction demolition waste is construction demolition waste with low impurity content, the construction demolition waste enters the crushing and screening module through the two-way conveying device of the feeding device for crushing and screening; When the construction demolition waste is construction demolition waste with high impurity content, the construction demolition waste enters the heavy-duty screening module through the two-way conveying device of the feeding device for impurity removal treatment, and then enters the crushing and screening module for crushing and screening. 8. system method according to claim 7, is characterized in that, when described construction demolition waste is low impurity content construction demolition waste, described system method comprises the following steps: (1) The construction demolition waste enters the vibrating feeding device for feeding and screening, the under-screen material enters the first magnetic separation device for the first impurity removal treatment, and the over-screen material enters the jaw crusher for the first crushing treatment and then enters the first magnetic separation device for the first impurity removal treatment; (2) The two-way conveying device transports 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 the second crushing treatment to obtain the crushed material; (3) After the crushed material in step (2) enters the fourth magnetic separation device for the second impurity removal treatment, it enters the circular vibrating screening device for screening to obtain aggregates of the first particle size, aggregates of the second particle size, aggregates of the third particle size and aggregates of the fourth particle size; (4) The aggregate with the fourth particle size in step (3) enters the second manual sorting unit for sorting treatment, and then returns to the crushing device. 9. system method according to claim 7, is characterized in that, when described construction demolition waste is high impurity content construction demolition waste, described system method comprises the following steps: (1) described construction demolition waste enters vibrating feeding device and carries out feeding and first screening process, and material under the screen enters first magnetic separation device and carries out first impurity removal process, and material on the screen enters jaw crusher and carries out first crushing process and then enters described first magnetic separation device and carries out first impurity removal process; (II) The two-way conveying device transports the material after the first impurity removal treatment in step (1) from the first direction to the heavy-duty composite screening device of the heavy-duty screening module for the second screening process, the screened material enters the second magnetic separation device and the first air separation device for the second impurity removal process, the screened material enters the third magnetic separation device and the second air separation device for the third impurity removal process, and the second impurity removal process and the material after the third impurity removal process enter the first manual sorting unit for the first sorting process; (III) The heavy material after the first sorting process in step (II) enters the crushing device of the crushing and screening module for a second crushing process to obtain crushed materials; (IV) After the crushed material in step (III) enters the fourth magnetic separation device for the fourth impurity removal treatment, it enters the circular vibrating screening device for screening to obtain aggregates of the first particle size, aggregates of the second particle size, aggregates of the third particle size and aggregates of the fourth particle size; (V) The aggregate with the fourth particle size in step (IV) enters the second manual sorting unit for the second sorting process, and then returns to the crushing device. 10. system method according to claim 8 or 9, is characterized in that, the particle diameter of the material after the first crushing treatment described in step (1) and step (1) is less than 180mm; Preferably, the particle size of the material in the sieve in the second sieving treatment in step (II) is 20-80 mm, and the particle size of the material on the sieve is 80-180 mm; Preferably, the particle size of the first aggregate in step (3) and step (IV) is 0-5 mm, the particle size of the second aggregate is 5-10 mm, the particle size of the third aggregate is 10-31.5 mm, and the particle size of the fourth aggregate is greater than 31.5 mm; Preferably, the third aggregate in step (3) and step (IV) enters the light matter separation device for impurity removal treatment.