Brick-concrete garbage separation and regeneration method and device

Abstract

The invention relates to a brick-mixed garbage separation and regeneration method and device. The brick-concrete garbage separation and regeneration method comprises the steps that S1, in the brick-concrete garbage feeding process, material components and bonding characteristics are detected; s2, according to a detection result, determining a unique brick-concrete dissociation mechanism corresponding to each part of materials in the n brick-concrete dissociation mechanisms, sorting each part of materials, and transmitting the sorted materials to the corresponding brick-concrete dissociation mechanisms; s3, based on the n brick-concrete dissociation mechanisms, differentiated crushing treatment is conducted on the brick-concrete garbage conveyed to the n brick-concrete dissociation mechanisms; s4, the materials crushed by the n brick-concrete dissociation mechanisms are screened, and brick materials and concrete materials are obtained; s5, sorting and purifying the concrete material obtained in the step S4; s6, crushing the concrete material separated and purified in the step S5 to obtain concrete aggregate; and S7, screening the concrete aggregate obtained by crushing in the step S6, and outputting the concrete aggregate in a plurality of particle size intervals.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction waste treatment, in particular to a brick-concrete waste separation and regeneration method. BACKGROUND

[0004] Efficient separation of bricks and concrete in construction waste is the core and difficulty of its resource utilization. The existing technology generally adopts the processing flow of "crushing-screening-separation", for example, the Chinese invention patent with the publication number CN112742578A and the name "a construction waste brick-concrete separation and sorting system" and the Chinese invention patent with the publication number CN110394225A and the name "a construction waste brick-concrete separation and comprehensive disposal process", the technical solutions disclosed in the patents can realize basic separation, but in the process of crushing and separating the construction waste, the loose materials will be excessively crushed to produce a large amount of powder, and the bonded materials will not be sufficiently screened and separated, which will seriously affect the purity, so the subsequent sorting equipment is needed to remove the mixed materials, resulting in low separation and utilization efficiency of the brick-concrete waste, which cannot meet the needs of the current construction industry for brick-concrete waste separation and regeneration. SUMMARY

[0005] The present application provides a brick-concrete waste separation and regeneration method to solve the problem of low separation and utilization rate of brick-concrete waste in the prior art.

[0006] The brick-concrete waste separation and regeneration method provided by the embodiments of the present application comprises: S1, detecting the material composition and bonding characteristics of the brick-concrete waste during the feeding of the brick-concrete waste; S2, determining the unique brick-concrete dissociation mechanism corresponding to each part of the material according to the detection results of the material composition and bonding characteristics, and sorting and transmitting each part of the material to the corresponding brick-concrete dissociation mechanism; n is an integer greater than or equal to 2, and the n brick-concrete dissociation mechanisms have different crushing characteristics for the brick-concrete waste; S3, based on the n brick-concrete dissociation mechanisms, differentiating the crushing treatment of the brick-concrete waste transmitted to the n brick-concrete dissociation mechanisms; S4, screening the materials after the crushing treatment of the n brick-concrete dissociation mechanisms to obtain brick materials and concrete materials; S5, sorting and purifying the concrete materials obtained in step S4; S6, crushing the concrete materials after the sorting and purification in step S5 to obtain concrete aggregates; S7, screening the concrete aggregates obtained by crushing in step S6 to output concrete aggregates in multiple particle size intervals.

[0007] In the step S1, the detection of the brick-concrete garbage adopts visual recognition and / or near-infrared spectrum analysis, and based on the image and / or spectrum information of the brick-concrete garbage feedstock obtained, the respective volume proportions, bonding strength and water content characteristics of the brick-concrete garbage feedstock are analyzed.

[0008] In the step S1, the detection of the brick-concrete garbage adopts visual recognition and / or near-infrared spectrum analysis, and based on the image and / or spectrum information of the brick-concrete garbage feedstock obtained, the respective volume proportions, bonding strength and water content characteristics of the brick-concrete garbage feedstock are analyzed. In the step S2, the detection results of high concrete content and strong bonding material sorting are transmitted to the first brick-concrete dissociation mechanism, and the detection results of high brick content and loose material sorting are transmitted to the second brick-concrete dissociation mechanism.

[0009] In the step S1, the detection of the brick-concrete garbage adopts visual recognition and / or near-infrared spectrum analysis, and based on the image and / or spectrum information of the brick-concrete garbage feedstock obtained, the respective volume proportions, bonding strength and water content characteristics of the brick-concrete garbage feedstock are analyzed. The second brick-concrete dissociation mechanism includes a shear type crusher or a double-shaft crusher with a rotation speed lower than 40 rpm, and the working parameters are configured to implement high-efficiency crushing of brittle materials and control the generation of powder.

[0010] In the step S6, the concrete material is crushed by a counter-attack type crusher.

[0011] In the step S6, the concrete material is crushed by a counter-attack type crusher.

[0012] In the step S6, the concrete material is crushed by a counter-attack type crusher. S60, crushing the sorted and purified concrete material; S61, detecting the particle size distribution of the concrete aggregate online at the outlet after the crushing of the concrete material; S62, comparing the detected particle size distribution of the concrete aggregate with the preset distribution interval of the concrete aggregate; S63, if the deviation between the detected particle size distribution of the concrete aggregate and the preset distribution interval of the concrete aggregate exceeds the set threshold, the crushing parameters in the crushing process of the concrete material in step S60 are modified.

[0013] In the step S7, the concrete aggregate is screened by a multi-layer vibrating screen with a circulation loop, the circulation loop connects the outlet of the multi-layer vibrating screen and the inlet of the counter-attack type crusher, and the concrete aggregate exceeding the preset maximum particle size filtered out at the outlet is introduced into the inlet of the counter-attack type crusher and crushed again in the counter-attack type crusher. In the step S7, the concrete aggregate is screened by a multi-layer vibrating screen with a circulation loop, the circulation loop connects the outlet of the multi-layer vibrating screen and the inlet of the counter-attack type crusher, and the concrete aggregate exceeding the preset maximum particle size filtered out at the outlet is introduced into the inlet of the counter-attack type crusher and crushed again in the counter-attack type crusher.

[0014] In the step S4, the heavy bar vibrating screen is used to screen the material crushed by the n brick-concrete dissociation mechanisms.

[0015] In the step S5, the air jet separator and / or the photoelectric separator are used to separate and purify the concrete material obtained in the step S4.

[0016] The brick-concrete waste separation and regeneration device provided by the application comprises a feeding module, a first detection and analysis module, a shunt transmission module, n brick-concrete dissociation mechanisms, a first separation module, a concrete crushing module, a second separation module and a third separation module. The feeding module is used to input brick-concrete waste. The first detection and analysis module is arranged at the feeding port of the feeding module and is used to detect the material composition and bonding characteristics of the brick-concrete waste input by the feeding module. The shunt transmission module comprises multiple transmission shunts connecting the feeding port of the feeding module to the n brick-concrete dissociation mechanisms and further comprises shunt valves used to control the states of the multiple transmission shunts. The n≥2, the n brick-concrete dissociation mechanisms at least comprise a first brick-concrete dissociation mechanism and a second brick-concrete dissociation mechanism. The first brick-concrete dissociation mechanism is used to accurately dissociate brick-concrete waste, and the second brick-concrete dissociation mechanism is used to efficiently crush brick-concrete structures. The first separation module is used to screen the material crushed by the n brick-concrete dissociation mechanisms and separate brick material and concrete material. The second separation module is connected with the concrete material outlet of the first separation module and is used to separate and remove impurities in the concrete material. The concrete crushing module is connected with the second separation module and is used to crush the concrete material separated by the second separation module to obtain concrete aggregate. The third separation module is connected with the concrete crushing module and is used to separate and screen the concrete aggregate to obtain clean concrete aggregate in multiple particle size intervals.

[0017] The brick-concrete waste separation and regeneration device further comprises an online particle size analyzer arranged at the outlet of the concrete crushing module and used to detect the particle size distribution of the concrete aggregate online.

[0018] The brick-concrete waste separation and regeneration device further comprises a controller. The controller compares the particle size distribution of the concrete aggregate detected by the online particle size analyzer with the preset distribution interval of the concrete aggregate and sends an instruction to the concrete crushing module to correct the crushing parameters of the concrete material when the deviation between the two exceeds a set threshold.

[0019] The brick-concrete waste separation and regeneration method and device provided by the embodiment of the application can classify and grade the brick-concrete waste by detecting the composition and bonding characteristics of the material during the feeding process of the brick-concrete waste, and the materials of different classifications are transmitted to different brick-concrete dissociation mechanisms corresponding to the materials, and the brick-concrete dissociation mechanisms perform targeted crushing processing on the received materials. Finally, after the crushing processing of the n brick-concrete dissociation mechanisms, the materials with different compositions and bonding characteristics in the brick-concrete waste can be well crushed, the high-concrete-content and strongly bonded materials can be effectively separated and crushed to obtain concrete aggregates, and the over-crushing of the high-brick-content and loose materials to form more powder can be avoided, so that more concrete aggregates can have a particle size distribution meeting the expectation, and more concrete aggregates can be distributed in an interval with high market demand and high economic value, thereby improving the separation and utilization efficiency of the brick-concrete waste and the economic value of the brick-concrete waste separation and regeneration. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0022] One or more embodiments are illustrated by way of example in the drawings that are for illustrative purposes only, and are not intended to limit the application, elements in the figures have the same reference numbers indicating similar elements, unless otherwise indicated, the drawings in the figures do not constitute a proportional limit.

[0023] Figure 1 A flowchart of the brick-concrete waste separation and regeneration method provided by the embodiment of the application is shown in the figure. Figure 2 A structural diagram of the brick-concrete waste separation and regeneration device provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without any creative effort are within the scope of protection of the application.

[0025] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0026] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0027] In one embodiment of the brick-concrete waste separation and recycling method of the present invention, see [reference needed]. Figure 1 The brick-concrete waste separation and recycling method includes the following steps S1 to S7.

[0028] S1, during the feeding process of brick-concrete waste, detect the material composition and bonding characteristics of the fed brick-concrete waste.

[0029] In step S1, a plate feeder can be used to feed the brick-concrete waste. To achieve better detection results, the plate feeder should feed the waste at a uniform speed and evenly during the feeding process. Also, for the same purpose, the brick-concrete waste can be screened before detection, for example, using a heavy-duty bar screen with a 50mm aperture for pre-screening. This step can remove impurities such as mud and slag from the brick-concrete waste.

[0030] In step S1, the detection of brick-concrete waste is carried out using visual recognition and / or near-infrared spectral analysis. Based on the images and / or spectral information of the brick-concrete waste feed obtained in practice, the volume ratio, bonding strength and moisture content characteristics of brick and concrete in the brick-concrete waste feed are analyzed.

[0031] Specifically, after pre-screening to remove some impurities, the brick-concrete waste feed enters the detection area. At this time, a high-resolution industrial camera can be used to continuously and in real time collect images of the brick-concrete waste being fed. The collected images are transmitted to the image processing unit for analysis and interpretation. When interpreting the collected images, a pre-trained convolutional neural network (CNN) model can be used to identify regions with different colors and texture features (bricks are generally red or brownish-yellow and generally have a porous structure, while concrete is generally gray and has a dense structure) and their proportions, thereby determining the volume ratio of bricks and concrete.

[0032] Simultaneously, a near-infrared spectroscopy (NIR) probe can be used to scan the material surface. By analyzing the absorption characteristics in specific wavelength ranges (e.g., around 1450 nm and 1940 nm), the moisture content of the material in different regions can be assessed. Based on the scanning results of the near-infrared spectroscopy probe, the internal bonding strength of the blocky material can also be determined according to the spectral characteristics (the strength level can be specifically divided into three grades: high, medium, and low).

[0033] The above-mentioned detection and analysis results of materials can be used to generate a special material characteristic label (carrying information about the detection results of the materials), and the data information of the material characteristic label can be sent to the central controller and the devices involved in subsequent stages.

[0034] S2, based on the test results of material composition and bonding characteristics, determine the unique brick-concrete disintegration mechanism corresponding to each part of the material among the n brick-concrete disintegration mechanisms, and pick and transfer each part of the material to the corresponding brick-concrete disintegration mechanism; n is an integer greater than or equal to 2, and the n brick-concrete disintegration mechanisms have different crushing characteristics for brick-concrete waste. In step S2, n brick-concrete disintegration mechanisms are set up. These n mechanisms are also used to crush brick-concrete waste, but their crushing intensity, process, and targeting of the crushed material components are different, and they are used for differentiated crushing of different materials. It can be understood that each brick-concrete disintegration mechanism has a corresponding relationship with a portion of brick-concrete waste, and it is specifically used to crush that portion of brick-concrete waste, achieving a good crushing effect. Therefore, in step S2, based on the detection of the material composition and adhesion characteristics of the brick-concrete waste feed completed in the previous step S1, the corresponding brick-concrete disintegration mechanism can be determined according to the detection results, and then each portion of material is transferred to the corresponding brick-concrete disintegration mechanism.

[0035] Taking n=2 as an example, that is, there are two brick-concrete separation mechanisms. These two mechanisms are designated as the first and second brick-concrete separation mechanisms. The first mechanism is used for precise separation of brick-concrete waste, while the second mechanism is used for efficient crushing of the brick-concrete structure. In actual implementation, materials with high concrete content and strong adhesion are selected and transferred to the first mechanism; materials with high brick content and loose material are selected and transferred to the second mechanism.

[0036] Understandably, to transfer each portion of material to its corresponding brick-concrete separation mechanism, multiple transfer paths are needed. These paths originate downstream of the detection area in step S1 and terminate at the inlets of n brick-concrete separation mechanisms. Furthermore, it is necessary to install, for example, electric or pneumatic flap valves to control the connectivity of these multiple transfer paths. For instance, if the detection result is "brick content > 60%" or "bonding strength: low," the flap valve can be controlled to connect the transfer path to the second brick-concrete separation mechanism; if the detection result is "concrete content > 50%" and "bonding strength: medium or high," the flap valve can be controlled to connect the transfer path to the first brick-concrete separation mechanism. For materials with unclear characteristics, a default path can be set (controlling the flap valve to connect the transfer path to the first brick-concrete separation mechanism).

[0037] S3, based on n brick-concrete separation mechanisms, performs differentiated crushing treatment on the brick-concrete waste transmitted to the n brick-concrete separation mechanisms.

[0038] In step S3, the brick and concrete waste received by the n brick and concrete separation mechanisms are all materials corresponding to them, and their crushing intensity, process, etc. are all aimed at this part of the material, so a good crushing effect can be obtained.

[0039] As in step S2 above, taking two brick-concrete separation mechanisms as an example, specifically, the first brick-concrete separation mechanism may include a vertical shaft impact crusher or an impact crusher, whose operating parameters are configured to prioritize high-energy impact force on the brick-concrete interface; the second brick-concrete separation mechanism includes a shear crusher or a twin-shaft crusher with a speed below 40 rpm, primarily using shearing and extrusion, whose operating parameters are configured to efficiently crush brittle materials and control powder generation. In actual implementation, for strongly bonded and high-concrete-content materials entering the first brick-concrete separation mechanism, a vertical shaft impact crusher (VSI) is used, with its rotor linear velocity set to 78 m / s, employing a "stone-on-stone" or "stone-on-iron" working mode. During operation, when the high-speed ejected material violently collides with the anvil or the material itself, the impact force prioritizes the brick-concrete interface with different hardness and toughness, thereby achieving efficient separation and fully separating the brick and concrete components while avoiding excessive crushing of the concrete aggregate. For the loose and... For materials with high brick content, a twin-shaft shear crusher is used, with the cutter roller speed set to 30 rpm and the blade gap adjustable according to the feed particle size. During operation, the material is subjected to shearing, tearing, and compression between the low-speed rotating cutter rollers, which can efficiently crush brittle materials such as bricks. Furthermore, due to the relatively gentle force, less fine powder is produced, which helps maintain good aggregate particle shape and high output.

[0040] S4, screening the materials after crushing by n brick-concrete separation mechanisms to obtain bricks and concrete.

[0041] In step S4, the materials crushed by the n brick-concrete separation mechanisms are collected by a conveyor and then screened.

[0042] This screening process can be performed using a heavy-duty bar vibrating screen with a screen aperture size of 40mm. After screening, materials with a particle size greater than 40mm are recorded as oversize, whose main components are dissociated bricks and a small amount of large concrete pieces; materials with a particle size less than 40mm are recorded as undersize, whose main components are concrete aggregate, mortar, and a small amount of brick fragments.

[0043] The oversize and undersize materials are processed separately. Specifically, the oversize material (brick stream) is conveyed to the centralized brick processing module, where an impact crusher or hammer crusher can be used to crush the bricks to the required particle size (e.g., 0~31.5mm) for use in the production of recycled brick aggregate or as raw material for brick making.

[0044] For the undersize material (concrete flow), proceed to step S5.

[0045] S5, the concrete material obtained in step S4 is sorted and purified.

[0046] In step S5, the concrete material is sorted and purified, which can remove or reduce the non-concrete substances contained in the screened material, thereby increasing the proportion of concrete.

[0047] Specifically, air-jet separators, photoelectric separators, or both can be used for sorting. In practice, high-precision vision sensors are used to identify the color difference between concrete (gray) and residual bricks (red). When a brick pixel is detected, a precise airflow nozzle at the corresponding location is controlled to instantly spray high-pressure air, blowing the brick away from the main material stream (this portion of bricks can later be transferred to a centralized brick processing module), thereby achieving purification. After this sorting and purification, the purity of the concrete stream can be increased to over 95%.

[0048] S6, crush the concrete material after sorting and purification in step S5 to obtain concrete aggregate.

[0049] In step S6, the concrete material is crushed to reduce its particle size and obtain the desired concrete aggregate. Specifically, in this step, an impact crusher can be used to crush the concrete material.

[0050] Specifically, step S6 includes the following steps S60 to S63.

[0051] S60 is used to crush the sorted and purified concrete material.

[0052] In step S60, an impact crusher is used to crush the concrete material, reducing the overall average particle size of the concrete material and forming concrete aggregate.

[0053] S61, at the outlet of the crushed concrete material, the particle size distribution of the concrete aggregate is detected online.

[0054] In step S61, an online particle size analyzer is installed at the discharge port of the impact crusher. The online particle size analyzer is used to detect the particle size of the concrete aggregate formed by crushing in step S60.

[0055] S62, compare the particle size distribution of the tested concrete aggregate with the preset distribution range of the concrete aggregate.

[0056] In step S62, the preset distribution range of concrete aggregate is a pre-set target range of concrete aggregate. This target range can be determined based on factors such as the value generated by the application of concrete aggregate of different particle sizes, the crushing performance of the impact crusher and the time and efficiency of crushing to produce concrete aggregate of different particle sizes, the demand for concrete aggregate of different particle sizes and the urgency of time, and is adjusted accordingly based on the dynamic changes of the above factors.

[0057] By comparing the particle size distribution of the concrete aggregate detected in step S61 with the preset distribution range mentioned above, the working status of the impact crusher in step S60 and the crushing effect on the concrete aggregate can be evaluated.

[0058] S63, if the comparison result shows that the deviation between the particle size distribution of the detected concrete aggregate and the preset distribution range of the concrete aggregate exceeds the set threshold, then the crushing parameters in the concrete crushing process in step S60 are corrected.

[0059] In step S63, if the aforementioned comparison result shows that the deviation between the detected particle size distribution of the concrete aggregate and the preset distribution range of the concrete aggregate exceeds a set threshold, this indicates that the operating status of the impact crusher in step S60 is abnormal, or that the crushing parameters previously set for the impact crusher are incorrect. In this case, correcting the crushing parameters during the concrete crushing process in step S60 can improve the aforementioned deviation and ensure that the particle size distribution of the concrete aggregate obtained by the impact crusher meets the target and expectation. Specifically, correcting the crushing parameters can involve adjusting the rotor speed, feed rate, and hammer gap of the impact crusher.

[0060] For example, an online particle size analyzer continuously monitors the particle size distribution of crushed concrete aggregate and transmits the data to the controller in real time. The controller has a preset optimization target: maximizing the yield of the 10-25mm particle size range, with its proportion exceeding 50% in the total. The controller operates a proportional-integral (PI) control algorithm: if real-time data indicates that the proportion of coarse-grained concrete aggregate with a particle size greater than 31.5mm exceeds 15%, it outputs a command to increase the rotor speed of the impact crusher by 50 rpm; if the proportion of powder with a particle size less than 5mm exceeds 20%, it outputs a command to decrease the rotor speed of the impact crusher by 50 rpm, while simultaneously reducing the feed rate by 10%. Through this real-time feedback and adjustment, the concrete aggregate produced by the impact crusher can always approach or reach the preset target.

[0061] S7, the concrete aggregate obtained from crushing in step S6 is screened to output concrete aggregate with multiple particle size ranges.

[0062] In step S7, a multi-layer vibrating screen can be used to screen the concrete aggregate. This multi-layer vibrating screen can specifically include four screen layers with apertures of 31.5mm, 20mm, 10mm, and 5mm from top to bottom. Based on this multi-layer linear vibrating screen, the concrete aggregate is screened into five grades: >31.5mm, 20~31.5mm, 10~20mm, 5~10mm, and 0~5mm.

[0063] In step S7, the multi-layer vibrating screen used to screen concrete aggregates may be equipped with a circulation loop. The circulation loop connects the outlet of the multi-layer vibrating screen and the inlet of the impact crusher, and guides the concrete aggregates that are filtered out at the outlet and exceed the preset maximum particle size into the inlet of the impact crusher, where they are crushed again.

[0064] Specifically, for the aforementioned grade 5 concrete aggregate, concrete aggregate with a particle size greater than 31.5 mm can be recycled back into the inlet of the impact crusher via a circulation loop to re-crush this portion of concrete aggregate so that its particle size can fall partially or completely into the desired particle size range of 10~25 mm after crushing.

[0065] Among the aforementioned five grades of concrete aggregates, key aggregate grades with high market demand and economic value, such as concrete aggregates with particle sizes of 10~20mm and 20~31.5mm, can be sorted and purified. Specifically, these aggregates are fed into sorting equipment such as high-precision photoelectric separators. Combined with high-definition line array cameras and multispectral light sources, the residual trace amounts of brick particles or lightweight materials can be identified from the concrete aggregates by recognizing the color and texture characteristics of the materials. These impurities can be removed using high-pressure air guns, ultimately obtaining high-cleanliness concrete aggregates with a purity of over 99%.

[0066] Concrete aggregates with particle sizes of 5-10mm or 0-5mm can be used in the production of recycled bricks and as roadbed materials.

[0067] In summary, the brick-concrete waste separation and recycling method provided by this invention detects the composition and binding characteristics of the brick-concrete waste during the feeding process, classifies and grades the waste, and transfers the different classified and graded materials to different brick-concrete separation mechanisms corresponding to their respective materials. These mechanisms then perform targeted crushing processing on the received materials. Ultimately, after crushing by n brick-concrete separation mechanisms, materials with different compositions and binding characteristics in the brick-concrete waste can be effectively crushed. This method effectively separates and crushes materials with high concrete content and strong binding properties to obtain concrete aggregates, while avoiding over-crushing of materials with high brick content and loose materials, which would result in excessive powder formation. This allows for a greater proportion of concrete aggregates with the expected particle size distribution, placing them within the range of high market demand and economic value. Therefore, this method improves the efficiency of brick-concrete waste separation and utilization, as well as the economic value of brick-concrete waste separation and recycling.

[0068] In an embodiment of the brick-concrete waste separation and recycling device provided by the present invention, such as Figure 2As shown, the brick-concrete waste separation and recycling device includes a feeding module, a first detection and analysis module, a branch transmission module, n brick-concrete separation mechanisms, a first sorting module, a concrete crushing module, a second sorting module, and a third sorting module. The feeding module is used to input brick-concrete waste. The first detection and analysis module is located at the feeding port of the feeding module and is used to detect the material composition and binding characteristics of the brick-concrete waste input by the feeding module. The branch transmission module includes multiple transmission branches connecting the feeding port of the feeding module to the n brick-concrete separation mechanisms, and also includes branch valves for controlling the status of the multiple transmission branches. n ≥ 2, and the n brick-concrete separation mechanisms include at least a first brick-concrete separation mechanism and a second brick-concrete separation mechanism. The first brick-concrete separation mechanism is used for precise separation of brick-concrete waste, and the second brick-concrete separation mechanism is used for efficient crushing of brick-concrete structures. The first sorting module is used to screen the materials crushed by the n brick-concrete separation mechanisms to separate brick materials and concrete materials. The second sorting module is connected to the concrete material outlet of the first sorting module and is used to sort and remove impurities in the concrete material. The concrete crushing module is connected to the second sorting module and is used to crush the concrete material sorted by the second sorting module to obtain concrete aggregate. The third sorting module is connected to the concrete crushing module and is used to sort and screen the concrete aggregate to obtain clean concrete aggregate with multiple particle size ranges.

[0069] In this embodiment, the brick-concrete waste separation and recycling device is mainly used to execute the various embodiments of the aforementioned brick-concrete waste separation and recycling method. The feeding module and the first detection and analysis module are used to implement the feeding and detection of material composition and bonding characteristics in step S1 of the aforementioned brick-concrete waste separation and recycling method. The branching and transmission module is used to implement the step S2 of picking and transmitting each part of the material to the corresponding brick-concrete disintegration mechanism. n brick-concrete disintegration mechanisms are used to disintegrate and crush the received material, i.e., to implement the content of step S3. The first sorting module is used to collect the crushed material from the n brick-concrete disintegration mechanisms and sort out brick and concrete materials, i.e., to implement the brick-concrete waste separation and recycling method. The following steps are performed: The brick and concrete materials separated by the first sorting module are processed separately. The brick materials are processed to form brick aggregate or used as raw materials for brick making. The concrete materials are sorted by the first sorting module to remove impurities and obtain higher purity concrete materials (step S5). Then, these concrete materials are transferred to the concrete crushing module for crushing, resulting in concrete aggregates of different particle sizes (step S6). Finally, the concrete aggregates of different particle sizes are sorted and screened to obtain clean concrete aggregates with multiple particle size ranges and grades, which are then used for different purposes (step S7).

[0070] The beneficial effects of the brick-concrete waste separation and recycling device in this embodiment of the invention are the same as those of the brick-concrete waste separation and recycling method described above, and will not be repeated here.

[0071] In one embodiment of the present invention, the brick-concrete waste separation and recycling device further includes an online particle size analyzer, which is installed at the discharge port of the concrete crushing module for online detection of the particle size distribution of concrete aggregates.

[0072] In this embodiment, by setting up an online particle size analyzer, the particle size distribution of concrete aggregate can be monitored and detected in real time, and it can be verified whether the particle size distribution of the generated concrete aggregate is within the preset distribution range and whether it meets expectations.

[0073] In one embodiment of the present invention, the brick-concrete waste separation and recycling device further includes a controller, which compares the particle size distribution of concrete aggregate detected by the online particle size analyzer with the preset distribution range of concrete aggregate, and sends an instruction to the concrete crushing module to correct the crushing parameters of the concrete material when the deviation between the two exceeds a set threshold.

[0074] In this embodiment, if the deviation between the particle size distribution of the concrete aggregate detected by the online particle size analyzer and the preset distribution range of the concrete aggregate exceeds a set threshold, it indicates that the operation of the concrete crushing module has malfunctioned, or that the crushing parameters previously set for the concrete crushing module are incorrect and cannot achieve the expected particle size distribution. In this case, the controller sends a command to the concrete crushing module to correct the crushing parameters of the concrete material, so that the particle size distribution of the concrete aggregate produced by the concrete crushing module tends to or is within the preset distribution range, approaching or meeting the preset target.

[0075] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0076] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0077] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for separating and recycling brick-concrete waste, characterized in that, The brick-concrete waste separation and recycling method includes: S1, During the feeding process of brick-concrete waste, detect the material composition and bonding characteristics of the fed brick-concrete waste; S2, based on the test results of material composition and bonding characteristics, determine the unique brick-concrete disintegration mechanism corresponding to each part of the material among the n brick-concrete disintegration mechanisms, and pick and transfer each part of the material to the corresponding brick-concrete disintegration mechanism; n is an integer greater than or equal to 2, and the n brick-concrete disintegration mechanisms have different crushing characteristics for brick-concrete waste. S3, based on n brick-concrete separation mechanisms, performs differentiated crushing treatment on the brick-concrete waste transmitted to the n brick-concrete separation mechanisms; S4, screen the material after crushing by n brick-concrete separation mechanisms to obtain brick material and concrete material; S5, the concrete material obtained in step S4 is sorted and purified; S6, crush the sorted and purified concrete material in step S5 to obtain concrete aggregate; S7, the concrete aggregate obtained from crushing in step S6 is screened to output concrete aggregate with multiple particle size ranges.

2. The method for separating and regenerating brick-concrete waste according to claim 1, characterized in that, In step S1, the detection of brick-concrete waste is carried out using visual recognition and / or near-infrared spectral analysis. Based on the acquisition of images and / or spectral information of the brick-concrete waste feed, the volume ratio, bonding strength and moisture content characteristics of brick and concrete in the brick-concrete waste feed are analyzed.

3. The method for separating and regenerating brick-concrete waste according to claim 1, characterized in that, The n=2, the two brick-concrete separation mechanisms are the first brick-concrete separation mechanism and the second brick-concrete separation mechanism. The first brick-concrete separation mechanism is used to accurately separate brick-concrete waste, and the second brick-concrete separation mechanism is used to efficiently crush brick-concrete structures. In step S2, materials with high concrete content and strong adhesion are picked up and transferred to the first brick-concrete separation mechanism; materials with high brick content and loose material are picked up and transferred to the second brick-concrete separation mechanism.

4. The method for separating and regenerating brick-concrete waste according to claim 3, characterized in that, The first brick-concrete separation mechanism includes a vertical shaft impact crusher or an impact crusher, whose working parameters are configured to set the rotor linear velocity in the range of 70-85 m / s, so that the material can obtain high kinetic energy, thereby allowing the impact force to act preferentially on the brick-concrete interface. The second brick-concrete separation mechanism includes a shear crusher or a twin-shaft crusher with a rotation speed of less than 40 rpm and mainly using shearing and extrusion actions. Its working parameters are configured to efficiently crush brittle materials and control powder generation.

5. The method for separating and regenerating brick-concrete waste according to claim 1, characterized in that, In step S6, an impact crusher is used to crush the concrete material.

6. The method for separating and regenerating brick-concrete waste according to claim 1 or 5, characterized in that, At the outlet of the crushed concrete material, an online particle size analyzer is used to detect the particle size distribution of the concrete aggregate.

7. The method for separating and regenerating brick-concrete waste according to claim 6, characterized in that, Step S6 includes: S60 is used to crush the sorted and purified concrete material. S61, At the outlet of the crushed concrete material, the particle size distribution of the concrete aggregate is detected online; S62, compare the detected particle size distribution of concrete aggregate with the preset distribution range of concrete aggregate; S63, if the comparison result shows that the deviation between the particle size distribution of the detected concrete aggregate and the preset distribution range of the concrete aggregate exceeds the set threshold, then the crushing parameters in the concrete crushing process in step S60 are corrected.

8. The method for separating and regenerating brick-concrete waste according to claim 5, characterized in that, In step S7, a multi-layer vibrating screen with a circulation loop is used to screen the concrete aggregate. The circulation loop connects the outlet of the multi-layer vibrating screen and the inlet of the impact crusher. The concrete aggregate that exceeds the preset maximum particle size filtered out at the outlet is introduced into the inlet of the impact crusher and crushed again in the impact crusher.

9. A brick-concrete waste separation and recycling device, characterized in that, The brick-concrete waste separation and recycling device includes a feeding module, a first detection and analysis module, a branch transmission module, n brick-concrete separation mechanisms, a first sorting module, a concrete crushing module, a second sorting module, and a third sorting module; The feeding module is used to input brick-concrete waste; The first detection and analysis module is set at the feed port of the feeding module and is used to detect the material composition and bonding characteristics of the brick-concrete waste input by the feeding module. The branch transmission module includes multiple transmission branches connecting the feed port of the feeding module to n brick-concrete separation mechanisms, and also includes branch valves for controlling the status of the multiple transmission branches. The n≥2, the n brick-concrete disintegration mechanisms include at least a first brick-concrete disintegration mechanism and a second brick-concrete disintegration mechanism, the first brick-concrete disintegration mechanism is used to accurately disintegrate brick-concrete waste, and the second brick-concrete disintegration mechanism is used to efficiently crush brick-concrete structures; The first sorting module is used to screen the materials after they have been crushed by the n brick-concrete separation mechanisms, and to separate brick materials and concrete materials. The second sorting module is connected to the concrete material outlet of the first sorting module and is used to sort and remove impurities from the concrete material. The concrete crushing module is connected to the second sorting module and is used to crush the concrete material sorted by the second sorting module to obtain concrete aggregate. The third sorting module is connected to the concrete crushing module and is used to sort and screen the concrete aggregate to obtain clean concrete aggregate with multiple particle size ranges.

10. The brick-concrete waste separation and recycling device according to claim 9, characterized in that, The brick-concrete waste separation and recycling device also includes an online particle size analyzer, which is installed at the discharge port of the concrete crushing module and is used to detect the particle size distribution of concrete aggregates online. The brick-concrete waste separation and recycling device also includes a controller. The controller compares the particle size distribution of concrete aggregate detected by the online particle size analyzer with the preset distribution range of concrete aggregate. When the deviation between the two exceeds a set threshold, the controller sends a command to the concrete crushing module to correct the crushing parameters of the concrete material.

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