A method and apparatus for sorting construction waste

Abstract

This application provides a method and apparatus for sorting construction waste. The sorting method includes: for target construction waste that has undergone primary crushing, primary screening is performed according to the unit particle diameter of the waste, followed by outputting slag, first medium-sized waste, and coarse-sized waste at a first conveying speed; the coarse-sized waste is sorted using spectral color sorting and visual grasping to obtain coarse-sized waste to be screened; the coarse-sized waste to be screened is subjected to secondary crushing, and secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste and recycled fine aggregate products; the first medium-sized waste and the second medium-sized waste are sorted by density difference to obtain recycled coarse aggregate products. In this way, sorting is performed based on the component characteristics of construction waste to effectively remove impurities in each particle size, improving the efficiency and accuracy of the sorting process.

Description

Technical Field

[0001] This application relates to the field of waste sorting technology, and in particular to a method and apparatus for sorting construction waste. Background Technology

[0002] Construction waste is composed of rigid aggregates (concrete, bricks, aerated concrete blocks, ceramic tiles, etc.), flexible lightweight debris (wood, plastics, woven bags, sponges, foams, etc.), and scrap metals (steel bars, non-ferrous metals, etc.), making its composition extremely complex, with significant fluctuations between each component. Construction waste sorting technologies generally rely on density differences between components, such as air separation, vibration-wind coupling separation, and buoyancy separation.

[0003] Currently, intelligent sorting technologies and equipment, such as intelligent grasping based on machine vision recognition and intelligent color sorting using compressed air jetting to separate materials based on differences in reflectance spectra, are gradually maturing. However, both of these intelligent sorting technologies require suitable operating conditions. Furthermore, due to the mixed composition of construction waste, it is difficult to achieve uniform waste transportation. Surges in short-term transportation or a sharp increase in the impurity content of the waste can cause overflow problems due to insufficient processing capacity of equipment at certain stages. In addition, most production lines are simply replacements for manual sorting, and their operational efficiency cannot be guaranteed. The highly mixed and extremely uneven nature of construction waste components, coupled with the indispensability of manual sorting, results in construction waste production lines still suffering from high labor requirements, high operating costs, unreliable sorting results, and unstable production. There is an urgent need for an intelligent sorting technology that can provide suitable operating conditions, reduce its usage requirements, and be rationally combined with other process stages to achieve unmanned operation and high-efficiency processing. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method, apparatus, electronic device, and storage medium for sorting construction waste. By crushing and screening construction waste, and considering the compositional characteristics of construction waste, the method employs visual grasping to sort large, coarse-sized waste, uses reflectance spectral color sorting to sort general coarse-sized waste, and uses density difference sorting to sort medium-sized waste. This achieves effective removal of impurities from waste of each particle size, controls the feed particle size range and conveying speed in the waste sorting process, eliminates the adverse effects of waste exceeding the particle size range, provides suitable working conditions for the waste sorting process, improves the efficiency and accuracy of the sorting process, and thus saves resources.

[0005] This application provides a method for sorting construction waste, the sorting method comprising:

[0006] For construction waste that has completed primary crushing, after primary screening according to the unit particle diameter of the waste, it is output at the first conveying speed to obtain slag, medium-sized waste and coarse-sized waste.

[0007] The coarse-particle waste is sorted by spectral color sorting and visual grasping to obtain coarse-particle waste to be screened;

[0008] The coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste and recycled fine aggregate products.

[0009] Density difference sorting is performed on the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products;

[0010] The slag, the recycled coarse aggregate product, and the recycled fine aggregate product are identified as sorting products of construction waste.

[0011] Furthermore, the step of outputting the first medium-sized waste at the first conveying speed includes:

[0012] Determine the first cumulative feed amount corresponding to the first medium-sized waste obtained from the output;

[0013] Determine whether the first cumulative feed amount is greater than the first calibrated buffer amount;

[0014] If so, the first conveying speed is adjusted to be reduced to the first calibrated speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0015] Furthermore, the coarse-particle waste includes general coarse-particle waste and large coarse-particle waste; the sorting of the coarse-particle waste by spectral color sorting and visual grasping to obtain coarse-particle waste to be screened includes:

[0016] The coarse-sized waste is conveyed at a second conveying speed for feed sorting;

[0017] By utilizing the spectral reflectance differences of waste particles, compressed air is used to separate the coarse-sized waste from the general coarse-sized waste to be screened.

[0018] Based on machine vision recognition technology, the large coarse-sized waste to be screened is separated from the large coarse-sized waste in the coarse-sized waste by grasping.

[0019] Furthermore, the step of conveying the coarse-sized waste at the second conveying speed for feed sorting includes:

[0020] Determine the specific spacing value between unit waste particles in the coarse-diameter waste and the number of unit waste particles in the coarse-diameter waste, respectively;

[0021] The specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset number of particles threshold;

[0022] When the specific spacing value is less than the preset spacing threshold and / or the number of waste particles per unit is greater than the preset number of particles threshold, the second conveying speed is adjusted to be reduced to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0023] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of waste particles per unit is less than or equal to the preset number of particles threshold, the second conveying speed is adjusted to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0024] Furthermore, the method also includes:

[0025] Determine whether the specific spacing value and the number of garbage particles per unit meet a predetermined condition; the predetermined condition is that the specific spacing value is greater than or equal to a preset spacing threshold and the number of garbage particles per unit is less than or equal to a preset particle count threshold.

[0026] If not, the specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset particle number threshold.

[0027] When the specific spacing value is less than the preset spacing threshold and / or the number of unit garbage particles is greater than the preset number of particles threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter garbage is output using the first calibration speed.

[0028] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit garbage particles is less than or equal to the preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0029] Furthermore, the step of determining the specific spacing value between unit waste particles in the coarse-grained waste includes:

[0030] Determine multiple spacing values ​​between unit waste particles in the coarse-grained waste;

[0031] The multiple spacing values ​​are arranged in ascending order, and the arranged multiple spacing values ​​are divided into multiple spacing windows according to a preset length;

[0032] Count the number of multiple spacing values ​​included in each spacing window and the upper and lower limits corresponding to the boundaries of each spacing window;

[0033] Following the ascending order of the multiple spacing values, the cumulative sum of the number of multiple spacing values ​​in multiple spacing windows is counted sequentially.

[0034] For each of the sums ...

[0035] The ratio is compared sequentially with the preset ratio;

[0036] According to the increasing order of the ratios, when the first ratio is greater than the preset ratio, the spacing window corresponding to that ratio is determined;

[0037] For the spacing window corresponding to the ratio, the lower limit value corresponding to the boundary of the spacing window is determined as the specific spacing value between unit waste particles in the coarse-grained waste.

[0038] Furthermore, the process of secondary crushing of the coarse-sized waste to be screened, followed by secondary screening according to the unit particle diameter of the coarse-sized waste, yields a second medium-sized waste and recycled fine aggregate products, including:

[0039] The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste.

[0040] Determine whether the impurity content of the discharged material is greater than a preset discharge threshold;

[0041] If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The second medium-sized waste and recycled fine aggregate products are output according to the third conveying speed.

[0042] If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste;

[0043] The remaining coarse-sized waste is subjected to secondary crushing and secondary screening according to the unit particle diameter of the coarse-sized waste. The waste is then output at a third conveying speed to obtain the second medium-sized waste and recycled fine aggregate products.

[0044] Furthermore, the step of outputting the second type of particle size waste at the third conveying speed includes:

[0045] Determine the second cumulative feed amount corresponding to the second particle size waste obtained from the output;

[0046] Determine whether the second cumulative feed amount is greater than the second calibrated buffer amount;

[0047] If so, the third conveying speed is adjusted to be reduced to the calibrated conveying speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0048] Furthermore, the density difference sorting includes primary density difference sorting and secondary density difference sorting; the density difference sorting of the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products includes:

[0049] The impurity content of the first medium-sized waste was determined by detecting the impurity content of the first medium-sized waste.

[0050] The feed impurity content is compared with a first preset feed threshold and a second preset feed threshold, respectively; the second preset feed threshold is greater than the first preset feed threshold;

[0051] When the impurity content of the feed is less than or equal to the first preset feed threshold, the first medium-sized waste is identified as recycled coarse aggregate product.

[0052] When the impurity content of the feed is greater than or equal to the second preset feed threshold, the first medium-sized waste is subjected to first-level density difference sorting and then second-level density difference sorting to obtain recycled coarse aggregate product.

[0053] When the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting to obtain recycled coarse aggregate product.

[0054] The second medium-sized waste is subjected to secondary density difference sorting to obtain recycled coarse aggregate products.

[0055] This application embodiment also provides a sorting device for construction waste, the sorting device comprising:

[0056] The first screening module is used to screen the target construction waste that has completed primary crushing according to the unit particle diameter of the waste, and output the waste, medium-sized waste, and coarse-sized waste according to the first conveying speed.

[0057] The first sorting module is used to sort the coarse-particle waste by means of spectral color sorting and visual grasping to obtain coarse-particle waste to be screened;

[0058] The second screening module is used to perform secondary crushing on the coarse-sized waste to be screened, and after secondary screening according to the unit particle diameter of the coarse-sized waste, to obtain the second medium-sized waste and recycled fine aggregate products.

[0059] The second sorting module is used to sort the first medium-sized waste and the second medium-sized waste by density difference to obtain recycled coarse aggregate products.

[0060] The product identification module is used to identify the slag, the recycled coarse aggregate product, and the recycled fine aggregate product as sorting products of construction waste.

[0061] Furthermore, when the first screening module is used to output waste of the first medium particle size at the first conveying speed, the first screening module is used to:

[0062] Determine the first cumulative feed amount corresponding to the first medium-sized waste obtained from the output;

[0063] Determine whether the first cumulative feed amount is greater than the first calibrated buffer amount;

[0064] If so, the first conveying speed is adjusted to be reduced to the first calibrated speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0065] Furthermore, the coarse-particle waste includes general coarse-particle waste and large coarse-particle waste; when the first sorting module sorts the coarse-particle waste using spectral color sorting and visual grasping to obtain the coarse-particle waste to be screened, the first sorting module is used for:

[0066] The coarse-sized waste is conveyed at a second conveying speed for feed sorting;

[0067] By utilizing the spectral reflectance differences of waste particles, compressed air is used to separate the coarse-sized waste from the general coarse-sized waste to be screened.

[0068] Based on machine vision recognition technology, the large coarse-sized waste to be screened is separated from the large coarse-sized waste in the coarse-sized waste by grasping.

[0069] Furthermore, when the first sorting module is used to convey the coarse-sized waste at a second conveying speed for feed sorting, the first sorting module is used to:

[0070] Determine the specific spacing value between unit waste particles in the coarse-diameter waste and the number of unit waste particles in the coarse-diameter waste, respectively;

[0071] The specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset number of particles threshold;

[0072] When the specific spacing value is less than the preset spacing threshold and / or the number of waste particles per unit is greater than the preset number of particles threshold, the second conveying speed is adjusted to be reduced to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0073] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of waste particles per unit is less than or equal to the preset number of particles threshold, the second conveying speed is adjusted to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0074] Furthermore, the first sorting module is also used for:

[0075] Determine whether the specific spacing value and the number of garbage particles per unit meet a predetermined condition; the predetermined condition is that the specific spacing value is greater than or equal to a preset spacing threshold and the number of garbage particles per unit is less than or equal to a preset particle count threshold.

[0076] If not, the specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset particle number threshold.

[0077] When the specific spacing value is less than the preset spacing threshold and / or the number of unit garbage particles is greater than the preset number of particles threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter garbage is output using the first calibration speed.

[0078] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit garbage particles is less than or equal to the preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0079] Furthermore, when determining the specific spacing value between unit waste particles in the coarse-grained waste, the first sorting module is used to:

[0080] Determine multiple spacing values ​​between unit waste particles in the coarse-grained waste;

[0081] The multiple spacing values ​​are arranged in ascending order, and the arranged multiple spacing values ​​are divided into multiple spacing windows according to a preset length;

[0082] Count the number of multiple spacing values ​​included in each spacing window and the upper and lower limits corresponding to the boundaries of each spacing window;

[0083] Following the ascending order of the multiple spacing values, the cumulative sum of the number of multiple spacing values ​​in multiple spacing windows is counted sequentially.

[0084] For each of the sums ...

[0085] The ratio is compared sequentially with the preset ratio;

[0086] According to the increasing order of the ratios, when the first ratio is greater than the preset ratio, the spacing window corresponding to that ratio is determined;

[0087] For the spacing window corresponding to the ratio, the lower limit value corresponding to the boundary of the spacing window is determined as the specific spacing value between unit waste particles in the coarse-grained waste.

[0088] Furthermore, when the second screening module is used to perform secondary crushing on the coarse-sized waste to be screened, and secondary screening according to the unit particle diameter of the coarse-sized waste to obtain the second medium-sized waste and recycled fine aggregate products, the second screening module is used for:

[0089] The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste.

[0090] Determine whether the impurity content of the discharged material is greater than a preset discharge threshold;

[0091] If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The second medium-sized waste and recycled fine aggregate products are output according to the third conveying speed.

[0092] If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste;

[0093] The remaining coarse-sized waste is subjected to secondary crushing and secondary screening according to the unit particle diameter of the coarse-sized waste. The waste is then output at a third conveying speed to obtain the second medium-sized waste and recycled fine aggregate products.

[0094] Furthermore, when the second screening module is used to output waste of the second particle size at the third conveying speed, the second screening module is used to:

[0095] Determine the second cumulative feed amount corresponding to the second particle size waste obtained from the output;

[0096] Determine whether the second cumulative feed amount is greater than the second calibrated buffer amount;

[0097] If so, the third conveying speed is adjusted to be reduced to the calibrated conveying speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0098] Furthermore, the density difference sorting includes primary density difference sorting and secondary density difference sorting; when the second sorting module is used to perform density difference sorting on the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products, the second sorting module is used for:

[0099] The impurity content of the first medium-sized waste was determined by detecting the impurity content of the first medium-sized waste.

[0100] The feed impurity content is compared with a first preset feed threshold and a second preset feed threshold, respectively; the second preset feed threshold is greater than the first preset feed threshold;

[0101] When the impurity content of the feed is less than or equal to the first preset feed threshold, the first medium-sized waste is identified as recycled coarse aggregate product.

[0102] When the impurity content of the feed is greater than or equal to the second preset feed threshold, the first medium-sized waste is subjected to first-level density difference sorting and then second-level density difference sorting to obtain recycled coarse aggregate product.

[0103] When the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting to obtain recycled coarse aggregate product.

[0104] The second medium-sized waste is subjected to secondary density difference sorting to obtain recycled coarse aggregate products.

[0105] This application provides a method and apparatus for sorting construction waste. The sorting method includes: for target construction waste that has undergone primary crushing, primary screening is performed according to the unit particle diameter of the waste, and output at a first conveying speed to obtain slag, first medium-sized waste, and coarse-sized waste; the coarse-sized waste is sorted by spectral color sorting and visual grasping to obtain coarse-sized waste to be screened; the coarse-sized waste to be screened is subjected to secondary crushing, and secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste and recycled fine aggregate product; the first medium-sized waste and the second medium-sized waste are sorted by density difference to obtain recycled coarse aggregate product; the slag, the recycled coarse aggregate product, and the recycled fine aggregate product are identified as the sorted products of construction waste.

[0106] Compared with existing technologies that rely on density differences between components and manual sorting, this method, through crushing and screening of construction waste, utilizes visual grasping to sort large, coarse-sized waste, reflectance spectral color sorting to sort general coarse-sized waste, and density difference sorting to sort medium-sized waste. This approach effectively removes impurities from waste of each size and controls the feed particle size range and conveying speed in the waste sorting process. It also eliminates the adverse effects of waste exceeding the particle size range, provides suitable working conditions for the waste sorting process, improves the efficiency and accuracy of the sorting process, and ultimately saves resources.

[0107] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0108] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0109] Figure 1 A flowchart illustrating a method for sorting construction waste provided in an embodiment of this application;

[0110] Figure 2 A flowchart illustrating the sorting process for coarse-sized waste to be screened, provided in an embodiment of this application;

[0111] Figure 3 This is a flowchart illustrating the density difference sorting process for medium-sized waste, provided in an embodiment of this application.

[0112] Figure 4 A schematic diagram of the process for sorting a target construction waste product provided in an embodiment of this application;

[0113] Figure 5 This is a schematic diagram of the structure of a construction waste sorting device provided in an embodiment of this application. Detailed Implementation

[0114] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0115] Research has found that intelligent sorting technologies and equipment, such as intelligent grasping based on machine vision recognition and intelligent color sorting using compressed air jetting to separate based on differences in reflectance spectrum, are gradually maturing. However, both of these intelligent sorting technologies require suitable working conditions. In addition, due to the mixed composition of construction waste, it is difficult to achieve uniform waste transportation. A surge in transportation within a short period of time or a sharp increase in the impurity content of the waste can cause the equipment at a certain stage to be unable to handle the overflow problem.

[0116] Based on this, the embodiments of this application provide a method for sorting construction waste. By crushing and screening the construction waste, and considering the compositional characteristics of the construction waste, a visual grasping method is used to sort large, coarse-sized waste, a reflectance spectral color sorting method is used to sort general coarse-sized waste, and a density difference method is used to sort medium-sized waste. This method effectively removes impurities from waste of each particle size and controls the feed particle size range and conveying speed in the waste sorting process. It also eliminates the adverse effects of waste exceeding the particle size range, provides suitable working conditions for the waste sorting process, improves the efficiency and accuracy of the sorting process, and thus saves resources.

[0117] Please see Figure 1 , Figure 1 This is a flowchart illustrating a method for sorting construction waste provided in an embodiment of this application. Figure 1 As shown in the embodiments of this application, the method for sorting construction waste includes:

[0118] S101. For the target construction waste that has completed primary crushing, after primary screening according to the unit particle diameter of the waste, the waste is output at the first conveying speed to obtain slag, medium-sized waste and coarse-sized waste.

[0119] It should be noted that the target construction waste refers to the original input waste from which recyclable products are expected to be obtained through the sorting process. For example, the target construction waste includes hard aggregates (concrete, bricks, aerated concrete blocks, tiles, etc.), flexible lightweight debris (wood, plastics, woven bags, sponges, foam, etc.), and scrap metals (steel bars, non-ferrous metals, etc.). The first conveying speed is the speed at which the user controls the conveying of waste or products using adjustable-speed conveying equipment. Slag can be used as a sorting product of the target waste, for example, for making building materials such as clay and cement. The first medium-sized and coarse-sized waste require further sorting.

[0120] In this step, firstly, a toothed roller crusher, which combines hardness and flexibility, is used to fully crush the flexible components of the target construction waste, achieving complete separation of large bricks and tiles, thus completing the primary crushing of the target construction waste; then, according to the unit particle diameter of the waste, a drum screen that can fully tumble and roll the material is used for primary screening of the target construction waste that has completed primary crushing, in order to enhance the grading effect of the target construction waste; finally, the adjustable speed conveyor is adjusted to the first conveying speed, and through this adjustable speed conveyor, slag, medium-sized waste, and coarse-sized waste are output according to the first conveying speed.

[0121] Specifically, the waste is screened according to the unit particle diameter to output slag, medium-sized waste, and coarse-sized waste. In one embodiment of this application, according to the unit particle diameter of the waste, the particles with a unit particle diameter of less than 5 mm are slag; the particles with a unit particle diameter of 5-31.5 mm are medium-sized waste; and the particles with a unit particle diameter of more than 31.5 mm are coarse-sized waste.

[0122] In one embodiment of this application, in specific implementation, the step S101 of outputting waste of the first medium particle size according to the first conveying speed may include:

[0123] S1011. Determine the first cumulative amount of feed corresponding to the first medium-sized waste obtained from the output.

[0124] In this step, firstly, the processing capacity for the first medium-sized particle size waste is determined, that is, the cumulative amount of first medium-sized particle size waste that the method used in this application can process per unit time; the actual amount of first medium-sized particle size waste output per unit time is calculated; finally, based on the calculation relationship between the actual amount of input output per unit time and the cumulative amount of first medium-sized particle size waste that can be processed per unit time, the first cumulative amount of input corresponding to the first medium-sized particle size waste output is determined.

[0125] Specifically, the calculation relationship between the actual output of feed per unit time and the cumulative feed of the first medium-sized waste that can be processed per unit time is shown below.

[0126]

[0127] Where A is the first cumulative feed amount corresponding to the first medium-sized waste, in tons (t); A i The actual amount of first-sized particle size waste fed per unit time, expressed in t / h; A 设 θ represents the cumulative amount of first-sized waste that can be processed per unit time, in t / h; θ represents the unit time length, in h.

[0128] S1012. Determine whether the first cumulative feed amount is greater than the first calibrated buffer amount.

[0129] In this step, the first calibration buffer amount is a buffer amount set for the first medium-sized waste output to ensure that the entire sorting process can proceed normally and avoid adverse effects caused by resource redundancy; the first calibration buffer amount is the calibration buffer amount corresponding to the first cumulative feed amount. The determined first cumulative feed amount and the first calibration buffer amount are compared to determine whether the first cumulative feed amount is greater than the first calibration buffer amount.

[0130] Specifically, the first calibrated buffer amount is the product of the maximum tolerance for the first medium-sized waste obtained from the output and the buffer ratio. For example, in one embodiment of this application, the buffer ratio may be 80%, but is not limited to 80%, and may be adjusted to other ratios according to engineering conditions.

[0131] S1013. If so, adjust the first conveying speed to reduce it to the first calibration speed, and use the first calibration speed to output the coarse-particle waste.

[0132] In this step, if the first cumulative amount of feed is greater than the first calibrated buffer amount, firstly, the first conveying speed of the originally set adjustable speed conveying device is reduced to the first calibrated speed; then, the coarse-sized waste is output using this first calibrated speed to ensure the normal operation of the conveying output process.

[0133] Here, the first calibration speed is the conveying speed value for the first cumulative feed amount, calibrated based on the experimental results of the first calibration buffer amount. It corresponds to the first conveying speed, the first cumulative feed amount, and the first calibration buffer amount, respectively.

[0134] S102. The coarse-sized waste is sorted by spectral color sorting and visual grasping to obtain coarse-sized waste to be screened.

[0135] It should be noted that, based on the unit particle diameter of coarse-grained waste, the coarse-grained waste includes general coarse-grained waste and large coarse-grained waste. Specifically, in one embodiment of this application, waste with a unit particle diameter greater than 31.5 mm is coarse-grained waste. Further refining this, waste with a unit particle diameter between 31.5 and 100 mm is general coarse-grained waste; waste with a unit particle diameter greater than 100 mm is large coarse-grained waste.

[0136] In this step, spectral color sorting is a method for sorting general coarse-sized waste. It uses the difference in the reflectance spectrum of waste particles and sorts them by blowing away impurities with compressed air. Visual grasping is a method for sorting large coarse-sized waste. It is based on machine vision recognition and controls the gripper of the grasping machine to sort the waste.

[0137] Here, since the amount of large coarse-sized waste is relatively small and the boundaries of the material particles are clear, it is easy to recognize images. Using visual grasping and sorting methods to sort large coarse-sized waste can achieve the effect of fine sorting and maximizing resource utilization. On the other hand, the number of particles of general coarse-sized waste is large and the gaps between particles are small. The probability of other components adhering to the particle surface is low. Using a blowing method can separate a large number of debris particles and achieve a high-efficiency sorting effect.

[0138] In one embodiment of this application, step S102 may include:

[0139] S1021. The coarse-sized waste is conveyed for feeding and sorting according to the second conveying speed.

[0140] In this step, by adjusting the adjustable speed conveyor to the second conveying speed, general coarse-sized waste and large coarse-sized waste are conveyed through the adjustable speed conveyor at the second conveying speed for feeding and sorting, in preparation for subsequent specific sorting of the two types of coarse-sized waste.

[0141] Here, the second conveying speed is the speed at which coarse-sized waste is conveyed, based on the engineering test results of the conveying equipment.

[0142] In one embodiment of this application, step S1021 may include:

[0143] S10211. Determine the specific spacing value between unit waste particles in the coarse-grained waste and the number of unit waste particles in the coarse-grained waste, respectively.

[0144] Here, by determining the specific spacing value between unit waste particles and the number of unit waste particles in coarse-grained waste, it is possible to determine whether there are problems with the feed rate congestion and process redundancy, and then adjust the relevant conveying speed to the range of normal production; in addition, the blowing position of visual grasping and spectral color sorting in the sorting method can be determined according to the specific spacing value.

[0145] In this step, firstly, multiple windows are divided based on the multiple spacing values ​​between unit waste particles in coarse-grained waste; then, specific spacing values ​​between unit waste particles in coarse-grained waste are obtained in ascending order; finally, the number of unit waste particles in coarse-grained waste is determined by identifying coarse-grained waste.

[0146] In one embodiment of this application, in specific implementation, the step of determining the specific spacing value between unit waste particles in the coarse-grained waste in step S10211 may include:

[0147] S102111. Determine multiple spacing values ​​between unit waste particles in the coarse-grained waste.

[0148] In this step, multiple spacing values ​​between unit waste particles in coarse-grained waste are obtained through an identification device; specifically, for example, if there are 100 unit particles of coarse-grained waste, multiple spacing values ​​between two adjacent unit particles in these 100 unit wastes are obtained through the identification device.

[0149] S102112. Arrange the plurality of spacing values ​​in ascending order, and divide the arranged plurality of spacing values ​​into a plurality of spacing windows according to a preset length.

[0150] In this step, firstly, the multiple spacing values ​​obtained by the recognition device are arranged into an increasing sequence in ascending order; then, the preset length corresponding to a specific spacing value is determined according to engineering requirements; finally, the increasing sequence formed by the multiple spacing values ​​is divided into multiple spacing windows according to the preset length.

[0151] For example, if the identification device obtains 500 spacing values ​​corresponding to 100 units of waste, and the preset length is determined to be 50mm, then these 500 spacing values ​​are divided into 10 spacing windows according to the preset length, and the length of each spacing window is 50mm.

[0152] S102113. Count the number of multiple spacing values ​​included in each spacing window and the upper and lower limits corresponding to the boundaries of each spacing window.

[0153] In this step, firstly, based on the determined multiple spacing windows, the number of multiple spacing values ​​included in each spacing window is counted; then, for each spacing window, the boundary of the spacing window is determined according to a preset length; finally, the upper limit value and lower limit value corresponding to the boundary of the spacing window are determined.

[0154] For example, if 500 spacing values ​​are divided into 10 spacing windows, and each spacing window is 50mm long, then the boundaries of the multiple spacing windows and their corresponding upper and lower limits are as follows: the boundary of the first spacing window is 0-50mm, with an upper limit of 50mm and a lower limit of 0mm; the boundary of the second spacing window is 50-100mm, with an upper limit of 100mm and a lower limit of 50mm; and so on, with the boundary of the tenth spacing window being 450-500mm, with an upper limit of 500mm and a lower limit of 450mm.

[0155] S102114. According to the increasing order of the multiple spacing values, the cumulative number of multiple spacing values ​​in multiple spacing windows is counted in turn.

[0156] In this step, firstly, based on the increasing sequence formed by the multiple spacing values ​​arranged, the number of multiple spacing values ​​included in each spacing window is counted sequentially according to the increasing order of this increasing sequence; then, the number of multiple spacing values ​​included in each spacing window is accumulated sequentially; finally, the sum of the number of multiple spacing values ​​in multiple spacing windows is determined.

[0157] For example, the first spacing window includes 25 spacing values ​​in the range of 0-50mm; the second spacing window includes 29 spacing values ​​in the range of 50-100mm; the third spacing window includes 33 spacing values ​​in the range of 150-200mm; the fourth spacing window includes 36 spacing values ​​in the range of 250-300mm; and so on, up to the tenth spacing window which includes 28 spacing values ​​in the range of 450-500mm; the number of multiple spacing values ​​included in each spacing window is added up sequentially, the sum corresponding to the first spacing window is 25, the sum corresponding to the first and second spacing windows is 54, the sum corresponding to the first, second and third spacing windows is 87; the sum corresponding to the first, second, third and fourth spacing windows is 123; and so on, the sum corresponding to the first to tenth spacing windows is 500.

[0158] S102115. For each of the sums ...

[0159] In this step, based on each of the sums of the determined sums of multiple spacing windows, the ratio of each sum to the total number of spacing values ​​is determined.

[0160] For example, the total number of spacing values ​​is 500; the sum of the first spacing window is 25, the sum of the first and second spacing windows is 54, the sum of the first, second, and third spacing windows is 87; the sum of the first, second, third, and fourth spacing windows is 123; and so on, the sum of the first to tenth spacing windows is 500; the ratio of the first spacing window is 5%; the ratio of the first and second spacing windows is 10.8%; the ratio of the first, second, and third spacing windows is 17.4%; the ratio of the first, second, third, and fourth spacing windows is 24.6%; and so on, the ratio of the first to tenth spacing windows is 100%.

[0161] S102116. Compare the ratio with the preset ratio in sequence;

[0162] In this step, the ratio of the cumulative number corresponding to the determined multiple spacing windows to the number of multiple spacing values ​​is compared with a preset ratio to determine the size relationship between the two ratios.

[0163] Here, since the specific spacing value between unit waste particles in coarse-grained waste is not the average or extreme value between unit waste particles in coarse-grained waste, but is determined based on the frequency distribution of multiple spacing values ​​and the data characteristics of spacing values ​​with frequency distribution in a lower range, in one embodiment of this application, the preset ratio is generally in the range of 10%-30%.

[0164] For example, the preset ratio is set to 20%; the ratio corresponding to the first spacing window is 5%; the ratio corresponding to the first and second spacing windows is 10.8%; the ratio corresponding to the first, second, and third spacing windows is 17.4%; the ratio corresponding to the first, second, third, and fourth spacing windows is 24.6%; and so on, with the ratio corresponding to the first to tenth spacing windows being 100%; the ratios corresponding to the first, second, and third spacing windows, the ratios corresponding to the first and second spacing windows, and the ratio corresponding to the first spacing window are all less than the preset ratio, while all other ratios are greater than the preset ratio.

[0165] S102117. According to the increasing order of the ratios, when the first ratio is greater than the preset ratio, determine the spacing window corresponding to the ratio.

[0166] In this step, based on the ratio of the cumulative number of the determined multiple spacing windows to the number of multiple spacing values, and based on the comparison result of the ratio and the preset ratio, the spacing window corresponding to the first ratio is determined when the first ratio is greater than the preset ratio, in ascending order of the ratio.

[0167] For example, the preset ratio is set to 20%; the ratio corresponding to the first spacing window is 5%; the ratio corresponding to the first and second spacing windows is 10.8%; the ratio corresponding to the first, second and third spacing windows is 17.4%; the ratio corresponding to the first, second, third and fourth spacing windows is 24.6%; and so on, with the ratio corresponding to the first to tenth spacing windows being 100%; wherein, starting from the fourth spacing window, the ratio is greater than the preset ratio.

[0168] S102118. For the spacing window corresponding to the ratio, the lower limit value corresponding to the boundary of the spacing window is determined as the specific spacing value between unit garbage particles in the coarse-grained garbage.

[0169] In this step, firstly, the boundary of the spacing window is determined according to the spacing window corresponding to the determined ratio; then, the lower limit value corresponding to the boundary of the spacing window is determined, and the lower limit value is determined as the specific spacing value between unit garbage particles in the coarse-grained garbage.

[0170] For example, starting from the fourth spacing window, the ratio is greater than a preset ratio, the boundary range corresponding to the fourth spacing window is 150-200mm, the lower limit of the boundary range is 150mm, and 150mm is determined as the specific spacing value between unit garbage particles in the coarse-grained garbage.

[0171] S10212. Compare the specific spacing value with the preset spacing threshold, and compare the number of unit garbage particles with the preset particle number threshold.

[0172] In this step, based on the determined specific spacing value and the number of garbage particles per unit, the specific spacing value and the number of garbage particles per unit are compared with the preset spacing threshold and the preset particle number threshold, respectively, to determine the comparison result. Based on the comparison result, the conveying speed of the adjustable speed conveyor is adjusted.

[0173] Here, the preset spacing threshold and preset particle number threshold are the maximum spacing and maximum particle number of coarse-diameter waste that can be tolerated during the sorting process, based on the conveying capacity of the adjustable speed conveyor and the maximum processing capacity of the sorted waste.

[0174] When the specific spacing value is greater than or equal to the preset spacing threshold and the number of waste particles per unit is less than or equal to the preset number of particles threshold, it indicates that the sorting process is operating normally, and there is no need to adjust the conveying speed of the adjustable speed conveyor.

[0175] S10213. When the specific spacing value is less than the preset spacing threshold and / or the number of waste particles per unit is greater than the preset number of particles threshold, the second conveying speed is adjusted to be reduced to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0176] In this step, when any of the following three situations occur: the specific spacing value is less than the preset spacing threshold, the number of waste particles per unit is greater than the preset particle number threshold, or the specific spacing value is less than the preset spacing threshold and the number of waste particles per unit is greater than the preset particle number threshold, firstly, the second conveying speed of the originally adjustable speed conveying device is reduced to the second calibrated speed; then, the coarse-diameter waste is conveyed using this second calibrated speed for feeding and sorting to ensure the normal operation of the feeding process.

[0177] S10214. When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit waste particles is less than or equal to the preset particle number threshold, the second conveying speed is adjusted to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0178] In this step, when either the specific spacing value is greater than or equal to a preset spacing threshold or the number of waste particles per unit is less than or equal to a preset particle number threshold, firstly, the second conveying speed of the originally adjustable speed conveying device is increased to the second calibrated speed; then, the coarse-diameter waste is conveyed using this second calibrated speed for feeding and sorting to ensure the normal operation of the feeding process.

[0179] Optionally, in addition to the method of conveying the coarse-sized waste at the second conveying speed for feeding and sorting, which includes steps S10211 to S10214, the method also includes steps S10215 to S10218. Specifically, steps S10215 to S10218 are used to explain the method of adjusting the first conveying speed to ensure that the coarse-sized waste can be fed and sorted normally when adjusting the second conveying speed fails to make the specific spacing value and the number of waste particles per unit not meet the predetermined conditions.

[0180] Here, the specific steps of steps S10211 to S10214 are as described above, and will not be repeated here.

[0181] S10215. Determine whether the specific spacing value and the number of garbage particles per unit meet a predetermined condition; the predetermined condition is that the specific spacing value is greater than or equal to a preset spacing threshold and the number of garbage particles per unit is less than or equal to a preset particle number threshold.

[0182] Here, when adjusting the second conveying speed fails to make the specific spacing value and the number of waste particles per unit meet the predetermined conditions, the first conveying speed can be adjusted to the first calibrated speed to make the specific spacing value and the number of waste particles per unit meet the predetermined conditions.

[0183] The predetermined condition is that the specific spacing value is greater than or equal to the preset spacing threshold and the number of waste particles per unit is less than or equal to the preset number of particles threshold. Under this condition, the sorting process is running normally, and there is no need to adjust the conveying speed of the adjustable speed conveyor.

[0184] In this step, the specific spacing value and the number of garbage particles per unit are compared with the preset spacing threshold and the preset particle number threshold, respectively, to determine whether they meet the predetermined condition that the specific spacing value is greater than or equal to the preset spacing threshold and the number of garbage particles per unit is less than or equal to the preset particle number threshold.

[0185] S10216. If not, compare the specific spacing value with the preset spacing threshold, and compare the number of unit garbage particles with the preset particle number threshold.

[0186] In this step, if the specific spacing value and the number of waste particles per unit do not meet the predetermined conditions, the comparison results of the specific spacing value and the number of waste particles per unit with the preset spacing threshold and the preset particle number threshold are determined, and the first conveying speed is adjusted according to the comparison results.

[0187] S10217. When the specific spacing value is less than the preset spacing threshold and / or the number of unit garbage particles is greater than the preset particle number threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0188] In this step, when any one of the following three situations occurs: the specific spacing value is less than the preset spacing threshold, the number of waste particles per unit is greater than the preset particle number threshold, or the specific spacing value is less than the preset spacing threshold and the number of waste particles per unit is greater than the preset particle number threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter waste is obtained by outputting the first calibration speed.

[0189] S10218. When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit garbage particles is less than or equal to the preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0190] In this step, when either the specific spacing value is greater than or equal to a preset spacing threshold or the number of unit garbage particles is less than or equal to a preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0191] S1022. Utilizing the spectral reflectance differences of waste particles, the coarse-particle waste to be screened is separated from the general coarse-particle waste to be screened by means of compressed air blowing.

[0192] In this step, based on the principle that the amount of light absorbed by different substances changes with wavelength, impurities in general coarse-grained waste are first identified, and then separated using compressed air nozzles. Since the particles in general coarse-grained waste are small and the impurities have low application value, there is no need to classify them. Instead, spectral color sorting is performed on general coarse-grained waste with a unit particle diameter between 31.5-100mm in construction waste to remove impurities from medium-sized waste. The remaining coarse-grained waste is then screened.

[0193] S1023. Based on machine vision recognition technology, the large coarse-sized waste to be screened is separated from the large coarse-sized waste to be screened in the coarse-sized waste by grasping.

[0194] Here, the uneven surface of large coarse-sized waste affects the accuracy of spectral color sorting. In addition, the large particle weight of large coarse-sized waste requires a large amount of compressed air for blowing, resulting in high energy consumption for spectral sorting. Therefore, visual grasping technology is used to sort large coarse-sized waste to remove impurities.

[0195] In this step, based on machine vision recognition technology, it is possible to classify and grab large-mass, large-volume waste material particles in a single operation. It is used to visually grab large coarse-sized waste particles with a unit particle diameter of more than 100mm in construction waste, which can recover usable components and remove impurities from large medium-sized waste particles, further improving the resource utilization rate of construction waste, and obtaining large coarse-sized waste particles to be screened from the coarse-sized waste particles to be screened.

[0196] S103. The coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain the second medium-sized waste and recycled fine aggregate products.

[0197] In this step, firstly, the impurity content of the coarse-sized waste to be screened is determined; then, it is determined whether the impurity content is greater than the preset discharge threshold; if not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste, and the waste and recycled fine aggregate products are output at the third conveying speed; if yes, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste; then, the remaining coarse-sized waste is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste, and the waste and recycled fine aggregate products are output at the third conveying speed.

[0198] In one embodiment of this application, step S103 may include:

[0199] S1031. The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste.

[0200] In this step, firstly, the discharge density and particle volume of the coarse-sized waste to be screened are identified using waste identification equipment, as well as the actual density and particle volume of impurities. Then, the actual particle density and particle volume of the coarse-sized waste to be screened are detected using waste composition detection equipment. Finally, based on the obtained discharge data and actual data, the discharge impurity rate of the coarse-sized waste to be screened is calculated according to the calculation formula.

[0201] Specifically, the method for calculating the impurity content of coarse-sized waste to be screened is as follows.

[0202]

[0203] Where, η 出 The impurity content of the coarse-sized waste to be screened; α i To identify the discharge density of coarse-grained waste to be screened, the unit is t / m³. 3 ;β i To identify the output particle volume of coarse-sized waste to be screened, the unit is m. 3 ;σ k To determine the actual particle density of the coarse-sized waste to be screened, the unit is t / m³. 3 ;λ k To determine the actual particle volume of coarse-sized waste to be screened, the unit is m. 3 ;γ j To identify the actual density of impurities in the coarse-grained waste to be screened, the unit is t / m³. 3 ;θ j To identify the actual particle volume of the impurities in the coarse-sized waste to be screened, the unit is m. 3 .

[0204] S1032. Determine whether the impurity content of the discharged material is greater than the preset discharge threshold.

[0205] In this step, the impurity content of the coarse-sized waste to be screened will be detected, and the output impurity content of the coarse-sized waste to be screened will be compared with the preset output threshold to determine whether the output impurity content is greater than the preset output threshold.

[0206] Here, the preset discharge threshold is the discharge standard impurity rate of coarse-sized waste to be screened, set according to product requirements and raw material conditions. It is used to evaluate whether the process of removing impurities from coarse-sized waste during spectral color sorting and visual grasping meets the standard.

[0207] Specifically, in one embodiment of this application, the preset discharge threshold is generally set between 5% and 8%, but is not limited to 5% to 8%, and can be adjusted to other ratios according to product requirements and raw material conditions.

[0208] S1033. If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The waste and recycled fine aggregate products are output according to the third conveying speed.

[0209] In this step, when the discharge impurity rate is less than or equal to the preset discharge threshold, firstly, the coarse-sized waste to be screened is subjected to secondary crushing by a hammer crusher that can selectively crush hard and brittle components to avoid large flexible impurities being crushed into small pieces; then, secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste with a particle diameter in the range of 5-31.5mm and recyclable fine aggregate products, and the second medium-sized waste and recyclable fine aggregate products are output at a third conveying speed.

[0210] S1034. If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste.

[0211] In this step, when the discharge impurity rate is greater than the preset discharge threshold, it indicates that the discharge impurity rate of the coarse-sized waste to be screened is too high and does not meet the preset discharge impurity rate standard. It is necessary to perform spectral color sorting on the coarse-sized waste to be screened to obtain the remaining coarse-sized waste, and then carry out subsequent crushing and screening processes.

[0212] S1035. The remaining coarse-sized waste is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The waste is then output at the third conveying speed to obtain the second medium-sized waste and recycled fine aggregate products.

[0213] In this step, firstly, the remaining coarse-sized waste is subjected to secondary crushing using a hammer crusher; then, it is subjected to secondary screening according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste with a particle diameter in the range of 5-31.5mm and recyclable fine aggregate products. The second medium-sized waste and the recycled fine aggregate products are then output at a third conveying speed.

[0214] For details, please refer to Figure 2 , Figure 2 This is a flowchart illustrating a sorting process for coarse-sized waste to be screened, provided as an embodiment of this application. Figure 2 As shown in the figure, the discharge impurity rate η is obtained by detecting the impurity rate of coarse-sized waste to be screened. 出 and η 出 With the preset discharge threshold η 设出 Comparison, when η 出 Greater than η 设出At that time, after spectral color sorting of the waste to be screened, secondary crushing and secondary screening are performed to obtain waste of the second medium particle size and recycled fine aggregate products; when η 出 Less than or equal to η 设出 At that time, the waste to be screened is directly subjected to secondary crushing and secondary screening to obtain waste of the second medium particle size and recycled fine aggregate products.

[0215] In one embodiment of this application, in specific implementation, the step of outputting the second particle size waste according to the third conveying speed in step S1035 may include:

[0216] S10351. Determine the second cumulative feed amount corresponding to the second medium-sized waste obtained from the output.

[0217] In this step, firstly, the processing capacity for the second medium-sized waste is determined, that is, the cumulative amount of second medium-sized waste that the method used in this application can process per unit time; the actual amount of second medium-sized waste output per unit time is calculated; finally, based on the calculation relationship between the actual amount of input per unit time and the cumulative amount of second medium-sized waste that can be processed per unit time, the second cumulative amount of input corresponding to the second medium-sized waste output is determined.

[0218] Specifically, the calculation relationship between the actual output of feed per unit time and the cumulative feed of second-sized waste that can be processed per unit time is shown below.

[0219]

[0220] Wherein, B represents the second cumulative feed amount corresponding to the second particle size waste, in tons (t); B i B represents the actual amount of second-sized waste fed per unit time, expressed in t / h. 设 θ represents the cumulative amount of second-sized waste that can be processed per unit time, in t / h; θ represents the unit time length, in h.

[0221] S10352. Determine whether the second cumulative feed amount is greater than the second calibrated buffer amount.

[0222] In this step, the second calibration buffer amount is a buffer amount set for the second medium-sized waste output to ensure that the entire sorting process can proceed normally and avoid adverse effects caused by resource redundancy; the second calibration buffer amount is the calibration buffer amount corresponding to the second cumulative feed amount. The determined second cumulative feed amount and the second calibration buffer amount are compared to determine whether the second cumulative feed amount is greater than the second calibration buffer amount.

[0223] Specifically, the second calibrated buffer amount is the product of the maximum tolerance for the second medium-sized waste obtained from the output and the buffer ratio. For example, in one embodiment of this application, the buffer ratio may be 80%, but is not limited to 80%, and may be adjusted to other ratios according to engineering conditions.

[0224] S10353. If so, adjust the third conveying speed to reduce it to the calibrated conveying speed, and use the first calibrated speed output to obtain the coarse-particle waste.

[0225] In this step, if the second cumulative feed amount is greater than the second calibrated buffer amount, firstly, the second conveying speed of the originally set adjustable speed conveying device is adjusted to be reduced to the second calibrated speed; then, the coarse-sized waste is output using this second calibrated speed to ensure the normal operation of the conveying output process.

[0226] Here, the second calibration speed is the conveying speed value for the second cumulative feed amount, calibrated based on the experimental results of the first calibration buffer amount. It corresponds to the second conveying speed, the second cumulative feed amount, and the second calibration buffer amount, respectively.

[0227] S104. Perform density difference sorting on the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products.

[0228] It should be noted that density difference sorting refers to the technology of sorting based on the density difference between components, such as air classification, vibration and wind coupling sorting, and water buoyancy sorting. Density difference sorting mainly selects impurities such as wood and hard plastics with small density differences from hard aggregates. Then, combined with the product standards for medium particle size, suitable recyclable recycled coarse aggregate products are selected.

[0229] Here, the density difference sorting includes primary density difference sorting and secondary density difference sorting. The sorting object of primary density difference sorting corresponds to the first medium-sized waste obtained by primary screening; the sorting object of secondary density difference sorting corresponds to the second medium-sized waste obtained by secondary screening.

[0230] In this step, firstly, the impurity content of the first medium-sized waste obtained from the primary screening is detected to obtain the impurity content of the first medium-sized waste in the feed; then, the impurity content of the feed is compared with the first preset feed threshold and the second preset feed threshold respectively; finally, based on the comparison results, the first medium-sized waste and the second medium-sized waste are subjected to primary density difference sorting and secondary density difference sorting respectively to obtain recycled coarse aggregate products.

[0231] In one embodiment of this application, step S104 may include:

[0232] S1041. The impurity content of the first medium-sized waste is determined by detecting the impurity content of the first medium-sized waste.

[0233] In this step, firstly, the feed density and feed particle volume of the first medium-sized waste are identified by the waste identification device; then, the actual density and actual particle volume of the impurity components are identified; finally, based on the obtained feed data and actual data, the feed impurity rate of the first medium-sized waste is calculated according to the calculation formula.

[0234] Specifically, the method for calculating the impurity content of the first type of waste is as follows.

[0235]

[0236] Where, η 入 The impurity content of the first medium-sized waste in the feed; α z To identify the feed density of the first type of waste particle size, the unit is t / m³. 3 ;β z To identify the feed particle volume of the first type of waste, the unit is m. 3 ;γ m To identify the actual density of impurity components in the first particle size waste, the unit is t / m³. 3 ;θ m To identify the actual particle volume of impurities in the first type of waste, the unit is m. 3 .

[0237] S1042, The impurity content of the feed is compared with the first preset feed threshold and the second preset feed threshold respectively; the second preset feed threshold is greater than the first preset feed threshold.

[0238] In this step, the impurity content of the first medium-sized waste will be detected by measuring the impurity content. The impurity content of the first medium-sized waste will be compared with the first preset feeding threshold and the second preset feeding threshold to determine the relationship between the impurity content and the first and second preset feeding thresholds.

[0239] Here, the second preset feed threshold is greater than the first preset feed threshold; the preset feed threshold is the feed calibration impurity rate of the first medium-sized waste set according to product requirements and raw material conditions, used to evaluate the proportion of impurities in the first medium-sized waste screened out during the primary screening process; the first preset feed threshold is a standard feed threshold with higher requirements for impurity removal accuracy, and the second preset feed threshold has relatively lower requirements for impurity removal accuracy compared to the first preset feed threshold.

[0240] Specifically, in one embodiment of this application, the first preset feeding threshold is generally set between 0.5% and 1%, but not limited to 0.5% and 1%; the second preset feeding threshold is generally set between 5% and 8%, but not limited to 5% and 8%. Here, the first preset feeding threshold and the second preset feeding threshold can be adjusted to other ratios according to product requirements and raw material conditions.

[0241] S1043. When the impurity content of the feed is less than or equal to the first preset feed threshold, the first medium-sized waste is identified as recycled coarse aggregate product.

[0242] In this step, when the impurity content of the feed is less than or equal to the first preset feed threshold, it indicates that the impurity content of the first medium-sized waste is extremely low, and the first medium-sized waste can be directly identified as a recyclable recycled coarse aggregate product.

[0243] S1044. When the impurity content of the feed is greater than or equal to the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting, and then secondary density difference sorting is performed to obtain recycled coarse aggregate product.

[0244] In this step, when the impurity content of the feed is greater than or equal to the second preset feed threshold, it indicates that the impurity content of the first medium-sized waste is very high. It is necessary to perform first-level density difference sorting on the first medium-sized waste and then perform second-level density difference sorting. This can achieve the effect of deep impurity removal for the first medium-sized waste with a high impurity content. After completing the two-level density difference sorting, the recycled coarse aggregate product is obtained.

[0245] S1045. When the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting to obtain recycled coarse aggregate product.

[0246] In this step, when the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, it indicates that the first medium-sized waste has a certain impurity content, but it is within a controllable range. The first medium-sized waste needs to be sorted by first-level density difference to obtain recycled coarse aggregate products.

[0247] S1046. Perform secondary density difference sorting on the second medium-sized waste to obtain recycled coarse aggregate products.

[0248] In this step, for the second medium-sized waste obtained through secondary screening, since the second medium-sized waste has already undergone secondary crushing and secondary screening before being obtained, it is necessary to perform secondary density difference sorting on the second medium-sized waste to obtain recycled coarse aggregate products.

[0249] For details, please refer to Figure 3 , Figure 3 This is a flowchart illustrating the density difference sorting process for medium-sized waste, provided as an embodiment of this application. Figure 3 As shown, the feed impurity rate η is obtained by detecting the impurity rate of the first medium-sized waste obtained from the primary screening. 入 and η 入 Each is related to the first feed threshold η 设入1 Second feed threshold η 设入2 Compare; when η 入 Less than or equal to η 设入1 When the first medium-sized waste does not require density difference sorting, recycled coarse aggregate products can be obtained directly; when η 入 Greater than or equal to η 设入2 At this time, the first-stage density difference sorting of the waste with the first medium particle size is required, followed by a second-stage density difference sorting to obtain recycled coarse aggregate products; when η 入 Greater than η 设入1 And η 入 Less than η 设入2 At that time, after primary density difference sorting of the first medium-sized waste, recycled coarse aggregate products are obtained.

[0250] S105. The slag, the recycled coarse aggregate product, and the recycled fine aggregate product are identified as sorting products of construction waste.

[0251] In this step, the slag is obtained through a primary screening process; the recycled coarse aggregate product is obtained by density difference sorting of the first and second medium-sized waste; the recycled fine aggregate product is obtained by spectral color sorting and visual grasping of the coarse-sized waste, followed by secondary crushing and secondary screening; the obtained slag, recycled coarse aggregate product and recycled fine aggregate product are identified as the sorted products of construction waste.

[0252] For details, please refer to Figure 4 , Figure 4 This is a schematic diagram illustrating the process of sorting a target construction waste product according to an embodiment of this application. Figure 4 As shown, after primary crushing of the target construction waste, primary screening yields slag, first medium-sized waste, and coarse-sized waste, which can be used as sorting products. The coarse-sized waste undergoes spectral color sorting and visual grasping to obtain coarse-sized waste to be screened. Based on the discharge impurity rate of the coarse-sized waste to be screened, it is determined whether further spectral color sorting is needed. Then, the coarse-sized waste to be screened undergoes secondary crushing and secondary screening to obtain second medium-sized waste and recycled fine aggregate products, which can be used as sorting products. The feed impurity rate of the first medium-sized waste is detected to determine whether primary density difference sorting and / or secondary density difference sorting are needed. Then, secondary density difference sorting is performed on the second medium-sized waste to obtain recycled coarse aggregate products, which can be used as sorting products.

[0253] This application provides a method for sorting construction waste. For construction waste that has undergone primary crushing, it is first screened according to the unit particle diameter, and then output at a first conveying speed to obtain slag, first medium-sized waste, and coarse-sized waste. The coarse-sized waste is sorted using spectral color sorting and visual grasping to obtain coarse-sized waste to be screened. The coarse-sized waste to be screened is then subjected to secondary crushing and secondary screening according to the unit particle diameter to obtain second medium-sized waste and recycled fine aggregate products. The first medium-sized waste and the second medium-sized waste are then sorted by density difference to obtain recycled coarse aggregate products. The slag, the recycled coarse aggregate products, and the recycled fine aggregate products are identified as the sorted construction waste products. In this way, by crushing and screening construction waste, and considering the compositional characteristics of the construction waste, visual grasping is used to sort large, coarse-sized waste, reflectance spectral color sorting is used to sort general coarse-sized waste, and density difference sorting is used to sort medium-sized waste. This achieves effective removal of impurities from waste of each particle size, and controls the feed particle size range and conveying speed in the waste sorting process to eliminate the adverse effects of waste exceeding the particle size range. This provides suitable working conditions for the waste sorting process, improves the efficiency and accuracy of the sorting process, and thus saves resources.

[0254] Please see Figure 5 , Figure 5 This is a schematic diagram of a construction waste sorting device provided in an embodiment of this application. Figure 5 As shown, the construction waste sorting device 500 includes:

[0255] The first screening module 510 is used to screen the target construction waste that has completed primary crushing according to the unit particle diameter of the waste, and output the slag, medium-sized waste and coarse-sized waste according to the first conveying speed.

[0256] The first sorting module 520 is used to sort the coarse-particle waste by means of spectral color sorting and visual grasping to obtain coarse-particle waste to be screened.

[0257] The second screening module 530 is used to perform secondary crushing on the coarse-sized waste to be screened, and after secondary screening according to the unit particle diameter of the coarse-sized waste, to obtain the second medium-sized waste and recycled fine aggregate products.

[0258] The second sorting module 540 is used to sort the first medium-sized waste and the second medium-sized waste by density difference to obtain recycled coarse aggregate products.

[0259] Product determination module 550 is used to determine the slag, the recycled coarse aggregate product and the recycled fine aggregate product as sorting products of construction waste.

[0260] Furthermore, when the first screening module 510 is used to output the first medium-sized waste at the first conveying speed, the first screening module 510 is used to:

[0261] Determine the first cumulative feed amount corresponding to the first medium-sized waste obtained from the output;

[0262] Determine whether the first cumulative feed amount is greater than the first calibrated buffer amount;

[0263] If so, the first conveying speed is adjusted to be reduced to the first calibrated speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0264] Furthermore, the coarse-particle waste includes general coarse-particle waste and large coarse-particle waste; when the first sorting module 520 sorts the coarse-particle waste by means of spectral color sorting and visual grasping to obtain the coarse-particle waste to be screened, the first sorting module 520 is used for:

[0265] The coarse-sized waste is conveyed at a second conveying speed for feed sorting;

[0266] By utilizing the spectral reflectance differences of waste particles, compressed air is used to separate the coarse-sized waste from the general coarse-sized waste to be screened.

[0267] Based on machine vision recognition technology, the large coarse-sized waste to be screened is separated from the large coarse-sized waste in the coarse-sized waste by grasping.

[0268] Furthermore, when the first sorting module 520 is used to convey the coarse-sized waste for feeding and sorting at a second conveying speed, the first sorting module 520 is used to:

[0269] Determine the specific spacing value between unit waste particles in the coarse-diameter waste and the number of unit waste particles in the coarse-diameter waste, respectively;

[0270] The specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset number of particles threshold;

[0271] When the specific spacing value is less than the preset spacing threshold and / or the number of waste particles per unit is greater than the preset number of particles threshold, the second conveying speed is adjusted to be reduced to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0272] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of waste particles per unit is less than or equal to the preset number of particles threshold, the second conveying speed is adjusted to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

[0273] Furthermore, the first sorting module 520 is also used for:

[0274] Determine whether the specific spacing value and the number of garbage particles per unit meet a predetermined condition; the predetermined condition is that the specific spacing value is greater than or equal to a preset spacing threshold and the number of garbage particles per unit is less than or equal to a preset particle count threshold.

[0275] If not, the specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset particle number threshold.

[0276] When the specific spacing value is less than the preset spacing threshold and / or the number of unit garbage particles is greater than the preset number of particles threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter garbage is output using the first calibration speed.

[0277] When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit garbage particles is less than or equal to the preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

[0278] Furthermore, when determining a specific spacing value between unit waste particles in the coarse-grained waste, the first sorting module 520 is used to:

[0279] Determine multiple spacing values ​​between unit waste particles in the coarse-grained waste;

[0280] The multiple spacing values ​​are arranged in ascending order, and the arranged multiple spacing values ​​are divided into multiple spacing windows according to a preset length;

[0281] Count the number of multiple spacing values ​​included in each spacing window and the upper and lower limits corresponding to the boundaries of each spacing window;

[0282] Following the ascending order of the multiple spacing values, the cumulative sum of the number of multiple spacing values ​​in multiple spacing windows is counted sequentially.

[0283] For each of the sums ...

[0284] The ratio is compared sequentially with the preset ratio;

[0285] According to the increasing order of the ratios, when the first ratio is greater than the preset ratio, the spacing window corresponding to that ratio is determined;

[0286] For the spacing window corresponding to the ratio, the lower limit value corresponding to the boundary of the spacing window is determined as the specific spacing value between unit waste particles in the coarse-grained waste.

[0287] Furthermore, when the second screening module 530 is used to perform secondary crushing on the coarse-sized waste to be screened, and secondary screening according to the unit particle diameter of the coarse-sized waste to obtain the second medium-sized waste and recycled fine aggregate products, the second screening module 530 is used for:

[0288] The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste.

[0289] Determine whether the impurity content of the discharged material is greater than a preset discharge threshold;

[0290] If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The second medium-sized waste and recycled fine aggregate products are output according to the third conveying speed.

[0291] If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste;

[0292] The remaining coarse-sized waste is subjected to secondary crushing and secondary screening according to the unit particle diameter of the coarse-sized waste. The waste is then output at a third conveying speed to obtain the second medium-sized waste and recycled fine aggregate products.

[0293] Furthermore, when the second screening module 530 is used to output waste of the second medium particle size at the third conveying speed, the second screening module 530 is used for:

[0294] Determine the second cumulative feed amount corresponding to the second particle size waste obtained from the output;

[0295] Determine whether the second cumulative feed amount is greater than the second calibrated buffer amount;

[0296] If so, the third conveying speed is adjusted to be reduced to the calibrated conveying speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

[0297] Furthermore, the density difference sorting includes primary density difference sorting and secondary density difference sorting; when the second sorting module 540 is used to perform density difference sorting on the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate product, the second sorting module 540 is used for:

[0298] The impurity content of the first medium-sized waste was determined by detecting the impurity content of the first medium-sized waste.

[0299] The feed impurity content is compared with a first preset feed threshold and a second preset feed threshold, respectively; the second preset feed threshold is greater than the first preset feed threshold;

[0300] When the impurity content of the feed is less than or equal to the first preset feed threshold, the first medium-sized waste is identified as recycled coarse aggregate product.

[0301] When the impurity content of the feed is greater than or equal to the second preset feed threshold, the first medium-sized waste is subjected to first-level density difference sorting and then second-level density difference sorting to obtain recycled coarse aggregate product.

[0302] When the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting to obtain recycled coarse aggregate product.

[0303] The second medium-sized waste is subjected to secondary density difference sorting to obtain recycled coarse aggregate products.

[0304] The construction waste sorting device provided in this application embodiment, for target construction waste that has completed primary crushing, performs primary screening according to the unit particle diameter of the waste, and outputs slag, first medium-sized waste, and coarse-sized waste at a first conveying speed; the coarse-sized waste is sorted by spectral color sorting and visual grasping to obtain coarse-sized waste to be screened; the coarse-sized waste to be screened is subjected to secondary crushing, and after secondary screening according to the unit particle diameter of the coarse-sized waste, a second medium-sized waste and recycled fine aggregate product are obtained; the first medium-sized waste and the second medium-sized waste are sorted by density difference to obtain recycled coarse aggregate product; the slag, the recycled coarse aggregate product, and the recycled fine aggregate product are identified as the sorted products of construction waste. In this way, by crushing and screening construction waste, and considering the compositional characteristics of the construction waste, visual grasping is used to sort large, coarse-sized waste, reflectance spectral color sorting is used to sort general coarse-sized waste, and density difference sorting is used to sort medium-sized waste. This achieves effective removal of impurities from waste of each particle size, and controls the feed particle size range and conveying speed in the waste sorting process to eliminate the adverse effects of waste exceeding the particle size range. This provides suitable working conditions for the waste sorting process, improves the efficiency and accuracy of the sorting process, and thus saves resources.

[0305] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0306] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0307] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0308] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0309] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0310] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for sorting construction waste, characterized in that, The sorting method includes: For construction waste that has completed primary crushing, after primary screening according to the unit particle diameter of the waste, it is output at the first conveying speed to obtain slag, medium-sized waste and coarse-sized waste. The coarse-particle waste is sorted by spectral color sorting and visual grasping to obtain coarse-particle waste to be screened; The coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste and recycled fine aggregate products. The process of secondary crushing of the coarse-sized waste to be screened, followed by secondary screening according to the unit particle diameter of the coarse-sized waste, yields a second medium-sized waste and recycled fine aggregate products, including: The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste. Determine whether the impurity content of the discharged material is greater than a preset discharge threshold; If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The second medium-sized waste and recycled fine aggregate products are output according to the third conveying speed. If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste; The remaining coarse-grained waste is subjected to secondary crushing and secondary screening according to the unit particle diameter of the coarse-grained waste. Then, it is output at the third conveying speed to obtain the second medium-grained waste and recycled fine aggregate products. Density difference sorting is performed on the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products; The slag, the recycled coarse aggregate product, and the recycled fine aggregate product are identified as sorting products of construction waste.

2. The method according to claim 1, characterized in that, The step of outputting the first medium-sized waste at the first conveying speed includes: Determine the first cumulative feed amount corresponding to the first medium-sized waste obtained from the output; Determine whether the first cumulative feed amount is greater than the first calibrated buffer amount; If so, the first conveying speed is adjusted to be reduced to the first calibrated speed, and the coarse-particle waste is obtained by outputting the first calibrated speed.

3. The method according to claim 1, characterized in that, The coarse-grained waste includes general coarse-grained waste and large coarse-grained waste; the sorting of the coarse-grained waste by spectral color sorting and visual grasping to obtain coarse-grained waste to be screened includes: The coarse-sized waste is conveyed at a second conveying speed for feed sorting; By utilizing the spectral reflectance differences of waste particles, compressed air is used to separate the coarse-sized waste from the general coarse-sized waste to be screened. Based on machine vision recognition technology, the large coarse-sized waste to be screened is separated from the large coarse-sized waste in the coarse-sized waste by grasping.

4. The method according to claim 3, characterized in that, The process of conveying the coarse-sized waste at a second conveying speed for feed sorting includes: Determine the specific spacing value between unit waste particles in the coarse-diameter waste and the number of unit waste particles in the coarse-diameter waste, respectively; The specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset number of particles threshold; When the specific spacing value is less than the preset spacing threshold and / or the number of waste particles per unit is greater than the preset number of particles threshold, the second conveying speed is adjusted to be reduced to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting. When the specific spacing value is greater than or equal to the preset spacing threshold or the number of waste particles per unit is less than or equal to the preset number of particles threshold, the second conveying speed is adjusted to the second calibration speed, and the coarse-diameter waste is conveyed at the second calibration speed for feeding and sorting.

5. The method according to claim 4, characterized in that, The method further includes: Determine whether the specific spacing value and the number of garbage particles per unit meet a predetermined condition; the predetermined condition is that the specific spacing value is greater than or equal to a preset spacing threshold and the number of garbage particles per unit is less than or equal to a preset particle count threshold. If not, the specific spacing value is compared with the preset spacing threshold, and the number of waste particles per unit is compared with the preset particle number threshold. When the specific spacing value is less than the preset spacing threshold and / or the number of unit garbage particles is greater than the preset number of particles threshold, the first conveying speed is adjusted to be reduced to the first calibration speed, and the coarse-diameter garbage is output using the first calibration speed. When the specific spacing value is greater than or equal to the preset spacing threshold or the number of unit garbage particles is less than or equal to the preset particle number threshold, the first conveying speed is adjusted to increase to the first calibration speed, and the coarse-diameter garbage is obtained by outputting the first calibration speed.

6. The method according to claim 4, characterized in that, The step of determining the specific spacing value between unit waste particles in the coarse-grained waste includes: Determine multiple spacing values ​​between unit waste particles in the coarse-grained waste; The multiple spacing values ​​are arranged in ascending order, and the arranged multiple spacing values ​​are divided into multiple spacing windows according to a preset length; Count the number of multiple spacing values ​​included in each spacing window and the upper and lower limits corresponding to the boundaries of each spacing window; Following the ascending order of the multiple spacing values, the cumulative sum of the number of multiple spacing values ​​in multiple spacing windows is counted sequentially. For each of the sums ... The ratio is compared sequentially with the preset ratio; According to the increasing order of the ratios, when the first ratio is greater than the preset ratio, the spacing window corresponding to that ratio is determined; For the spacing window corresponding to the ratio, the lower limit value corresponding to the boundary of the spacing window is determined as the specific spacing value between unit waste particles in the coarse-grained waste.

7. The method according to claim 1, characterized in that, The step of outputting the second type of particle size waste at the third conveying speed includes: Determine the second cumulative feed amount corresponding to the second particle size waste obtained from the output; Determine whether the second cumulative feed amount is greater than the second calibrated buffer amount; If so, the third conveying speed is adjusted to be reduced to the calibrated conveying speed, and the coarse-particle waste is obtained by outputting the calibrated conveying speed.

8. The method according to claim 1, characterized in that, The density difference sorting includes primary density difference sorting and secondary density difference sorting; the density difference sorting of the first medium-sized waste and the second medium-sized waste to obtain recycled coarse aggregate products includes: The impurity content of the first medium-sized waste was determined by detecting the impurity content of the first medium-sized waste. The feed impurity content is compared with a first preset feed threshold and a second preset feed threshold, respectively; the second preset feed threshold is greater than the first preset feed threshold; When the impurity content of the feed is less than or equal to the first preset feed threshold, the first medium-sized waste is identified as recycled coarse aggregate product. When the impurity content of the feed is greater than or equal to the second preset feed threshold, the first medium-sized waste is subjected to first-level density difference sorting and then second-level density difference sorting to obtain recycled coarse aggregate product. When the impurity content of the feed is greater than the first preset feed threshold and less than the second preset feed threshold, the first medium-sized waste is subjected to primary density difference sorting to obtain recycled coarse aggregate product. The second medium-sized waste is subjected to secondary density difference sorting to obtain recycled coarse aggregate products.

9. A sorting device for construction waste, characterized in that, The sorting device includes: The first screening module is used to screen the target construction waste that has completed primary crushing according to the unit particle diameter of the waste, and output the waste, medium-sized waste, and coarse-sized waste according to the first conveying speed. The first sorting module is used to sort the coarse-particle waste by spectral color sorting and visual grasping to obtain coarse-particle waste to be screened. The second screening module is used to perform secondary crushing on the coarse-sized waste to be screened, and after secondary screening according to the unit particle diameter of the coarse-sized waste, to obtain the second medium-sized waste and recycled fine aggregate products. The second sorting module is used to sort the first medium-sized waste and the second medium-sized waste by density difference to obtain recycled coarse aggregate products. The product identification module is used to identify the slag, the recycled coarse aggregate product, and the recycled fine aggregate product as sorting products of construction waste; When the second screening module is used to perform secondary crushing on the coarse-sized waste to be screened, and then performs secondary screening according to the unit particle diameter of the coarse-sized waste to obtain second medium-sized waste and recycled fine aggregate products, the second screening module is used for: The impurity content of the coarse-sized waste to be screened is determined by detecting the impurity content of the waste. Determine whether the impurity content of the discharged material is greater than a preset discharge threshold; If not, the coarse-sized waste to be screened is subjected to secondary crushing, and then secondary screening is performed according to the unit particle diameter of the coarse-sized waste. The second medium-sized waste and recycled fine aggregate products are output according to the third conveying speed. If so, the coarse-sized waste to be screened is sorted by spectral color sorting to obtain the remaining coarse-sized waste; The remaining coarse-sized waste is subjected to secondary crushing and secondary screening according to the unit particle diameter of the coarse-sized waste. The waste is then output at a third conveying speed to obtain the second medium-sized waste and recycled fine aggregate products.

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