A kind of production equipment and method for resource processing of decoration waste

Abstract

The present application relates to the technical field of recycling renovation waste resources, and specifically to a production device and method for recycling renovation waste resources. The method comprises: evenly distributing renovation waste on a conveyor belt; sorting the renovation waste on the conveyor belt; performing primary crushing on the sorted renovation waste and then screening it to obtain a first aggregate and a second aggregate; magnetically separating the first aggregate and the second aggregate using a magnetic separator; controlling the magnetic separation current during the magnetic separation process of the magnetic separator, performing secondary crushing on the magnetically separated second aggregate and then mixing it with the magnetically separated first aggregate for air separation; screening the air-separated aggregate, and if there is aggregate larger than a preset particle size after screening, performing secondary crushing again to obtain aggregate meeting the preset particle size; and performing tertiary crushing on the aggregate meeting the preset particle size, and screening to obtain fine aggregate, medium aggregate, and coarse aggregate. This improves the quality of recycled aggregate from renovation waste.

Description

Technical Field

[0001] The present application relates to the technical field of recycling renovation waste resources, and in particular to a production device and method for recycling renovation waste resources. Background Art

[0002] Renovation waste primarily originates from waste generated during home renovation, repair, and demolition, including concrete, bricks, drywall, wood, and metal products. Traditional methods of disposing of renovation waste rely on landfill and incineration, which consumes significant land resources and pollutes soil, water, and air. Recycling renovation waste not only effectively reduces environmental pollution, conserves resources, and reduces energy and emissions, but also creates new economic growth opportunities and promotes a greener and more sustainable society.

[0003] In the existing resource recovery process of renovation waste, renovation waste is usually converted into recycled aggregate for brick making. However, in the process of obtaining recycled aggregate, there is a problem of incomplete sorting of recycled aggregate and heavy metal leaching in the screened aggregate, which affects the durability of recycled aggregate products. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a production equipment and method for resource processing of decoration waste. The technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for recycling renovation waste, the method comprising the following steps:

[0006] The sorted renovation waste is crushed and then screened to obtain a first aggregate and a second aggregate, wherein the particle size of the first aggregate is smaller than that of the second aggregate; the first aggregate and the second aggregate are magnetically separated using a magnetic separator respectively; and the steps of controlling the magnetic separation current during the magnetic separation process of the magnetic separator are as follows:

[0007] Collect the pressure at each preset position in the magnetic separator at each moment, and collect the linear speed of the electromagnetic roller of the magnetic separator and the conveyor belt speed at each moment;

[0008] Analyzing the change and dispersion of the pressure at all preset positions in the magnetic separator of the first aggregate at the current moment to obtain the resistance factor of the magnetic separator of the first aggregate at the current moment;

[0009] Analyze the pressure variation range at all preset positions in the magnetic separator for the second aggregate at the current moment, and the distance between the preset positions, to obtain the resistance factor of the magnetic separator for the second aggregate at the current moment;

[0010] Based on the resistance factor of the magnetic separator for the first aggregate and the resistance factor of the magnetic separator for the second aggregate at the current moment, combined with the difference between the linear velocity and the conveying speed of the conveyor belt at the current moment, respectively determine the magnetic separation current of the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment;

[0011] Based on the first aggregate and the second aggregate after magnetic separation, multiple crushing and screening are performed to obtain aggregates divided into various particle size ranges.

[0012] In one embodiment, the sorting is to evenly spread the decoration waste on a conveyor belt and remove wood and plastic waste from the decoration waste.

[0013] In one embodiment, the particle size of the first aggregate is 0-31.5 mm, and the particle size of the second aggregate is 31.5-100 mm.

[0014] In one embodiment, determining the resistance factor of the magnetic separator of the first aggregate at the current moment includes:

[0015] Calculating an average value of the pressures at all preset positions in the magnetic separator for the first aggregate at the current moment, and calculating a difference between the average value and the pressure when there is no aggregate in the magnetic separator, which is recorded as a first difference;

[0016] Based on the first difference and the degree of dispersion, a resistance factor of a magnetic separator for the first aggregate at a current moment is determined.

[0017] In one embodiment, the resistance factor of the magnetic separator of the first aggregate at the current moment is positively correlated with the first difference and negatively correlated with the degree of dispersion.

[0018] In one embodiment, determining the resistance factor of the magnetic separator of the second aggregate at the current moment includes:

[0019] The range of the pressure at all preset positions in the magnetic separator for the second aggregate at the current moment is calculated, and the distance between two preset positions corresponding to the range is obtained. The resistance factor of the magnetic separator for the second aggregate at the current moment is the fusion result of the range and the distance.

[0020] In one embodiment, determining the magnetic separation currents of the magnetic separators for the first aggregate and the second aggregate at the current moment respectively includes:

[0021] For the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment, if the difference between their linear speeds and the conveyor belt transmission speeds is less than a preset threshold value, the magnetic separation currents of the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment are their upper limits of operating currents; otherwise, for the magnetic separator for the first aggregate at the current moment, based on the difference between the linear speeds and the conveyor belt transmission speeds at the current moment and the resistance factor of the magnetic separator for the first aggregate, an adjustment weight for the magnetic separator for the first aggregate at the current moment is determined, and the product of the adjustment weight and the difference between the upper and lower limits of the operating current range of the magnetic separator is calculated;

[0022] Determine the difference between the upper limit of the working current of the magnetic separator of the first aggregate at the current moment and the product as the magnetic separation current of the magnetic separator of the first aggregate at the current moment;

[0023] The magnetic separation current of the magnetic separator for the second aggregate at the current moment is obtained based on the resistance factor of the magnetic separator for the second aggregate using the same method as that for the magnetic separation current of the magnetic separator for the first aggregate at the current moment.

[0024] In one embodiment, the first aggregate and the second aggregate after magnetic separation are crushed and screened multiple times to obtain aggregates divided into various particle size ranges, including:

[0025] The second aggregate after magnetic separation is subjected to secondary crushing and then mixed with the first aggregate after magnetic separation for air separation; the aggregate after air separation is screened, and if there is aggregate larger than a preset particle size after screening, it is subjected to secondary crushing again to obtain aggregate meeting the preset particle size;

[0026] Aggregates that meet the preset particle size are crushed in three stages and sieved to obtain fine aggregate, medium aggregate and coarse aggregate.

[0027] In one embodiment, the preset particle size is 31.5 mm, the fine aggregate is 0-5 mm, the medium aggregate is 5-10 mm, and the coarse aggregate is 10-31.5 mm.

[0028] In the second aspect, the embodiment of the present application also provides a production equipment for resource processing of decoration waste, which includes a crusher, a screening device, a magnetic separator, a data acquisition module, and a magnetic separation current control module. The data acquisition module is used to collect the pressure of each preset position in the magnetic separator at each moment, as well as the linear speed of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment; the aggregate crushed by the crusher is transferred to the screening device for screening, and the screened aggregate is transferred to the magnetic separator for magnetic separation. A data acquisition module and a magnetic separation current control module are set in the magnetic separator. After the data is collected, the data acquisition module inputs the data into the magnetic separation current control module for processing. The magnetic separation current control module implements the above-mentioned steps of controlling the magnetic separation current during the magnetic separation process of the magnetic separator.

[0029] This application has at least the following beneficial effects:

[0030] The present application achieves this by evenly spreading decoration waste on a conveyor belt; sorting the decoration waste on the conveyor belt to remove wood and plastic in the decoration waste to avoid affecting the quality of recycled aggregate; crushing the sorted decoration waste at the first level and then screening it to obtain a first aggregate and a second aggregate; magnetically separating the first aggregate and the second aggregate using a magnetic separator respectively; controlling the magnetic separation current during the magnetic separation process of the magnetic separator, collecting the pressure at each preset position at each moment in the magnetic separator, collecting the linear speed of the electromagnetic roller of the magnetic separator at each moment and the conveying speed of the conveyor belt; analyzing the change and discrete degree of the pressure at all preset positions at the current moment in the magnetic separator of the first aggregate to obtain the resistance factor of the magnetic separator of the first aggregate at the current moment; reflecting the metal resistance of the magnetic separator of the first aggregate at the current moment, reflecting the matching degree of the magnetic field strength and metal resistance of the magnetic separator at the current moment, and improving the reliability of the magnetic separation current adjustment of the subsequent magnetic separator; analyzing the change range of the pressure at all preset positions at the current moment in the magnetic separator of the second aggregate the resistance factor of the magnetic separator for the second aggregate at the current moment is obtained based on the resistance factor of the magnetic separator for the first aggregate and the resistance factor of the magnetic separator for the second aggregate at the current moment, combined with the difference between the linear velocity and the conveying speed of the conveyor belt at the current moment, respectively determining the magnetic separation current of the magnetic separator for the first aggregate and the second aggregate at the current moment; improving the accuracy of the magnetic separation current control of the magnetic separator for the first aggregate and the second aggregate, thereby improving the magnetic separation effect of the magnetic separator, and effectively removing the metal components in the first aggregate and the second aggregate; subjecting the magnetically separated second aggregate to secondary crushing and then mixing with the magnetically separated first aggregate for air separation; screening the aggregate after air separation, and if there is aggregate larger than the preset particle size after screening, subjecting it to secondary crushing again to obtain aggregate meeting the preset particle size; subjecting the aggregate meeting the preset particle size to tertiary crushing, and obtaining fine aggregate, medium aggregate and coarse aggregate after screening, thereby improving the resource processing efficiency of decoration waste and improving the quality and durability of recycled aggregate products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A flowchart of a method for recycling renovation waste provided in one embodiment of the present application;

[0033] Figure 2It is a structural diagram of an electromagnetic roller belt magnetic separator;

[0034] Figure 3 This is the magnetic separation current control flow chart of the magnetic separator;

[0035] Figure 4 Flow chart for the production of recycled aggregate from renovation waste. DETAILED DESCRIPTION

[0036] In order to further illustrate the technical means and effects adopted by this application to achieve the intended invention objectives, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effects of a renovation waste resource processing production device and method proposed in this application. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable form.

[0037] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0038] The specific scheme of the production equipment and method for resource processing of decoration waste provided by this application is described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 , which shows a flowchart of a method for recycling renovation waste provided by an embodiment of the present application, the method comprising the following steps:

[0040] S1, evenly spread the decoration waste on the transmission belt; sort the decoration waste on the transmission belt.

[0041] Renovation waste refers to waste generated directly or indirectly during home renovation and repair. Its collection and management are key to urban governance. Based on fixed waste dumps within residential communities, transport vehicles with enclosed compartments transport waste from these communities to integrated raw material storage workshops, thereby enabling the collection of scattered renovation waste within the city.

[0042] The purpose of transport vehicles with enclosed compartments is to prevent dust and spillage during transportation, which could pollute the city. The integrated raw material storage workshop is a place where renovation waste materials are accumulated, enabling their stacking, transfer, and temporary storage.

[0043] The components of renovation waste that can be processed into renewable aggregates mainly include: concrete blocks, brick and tile fragments, ceramics, gypsum boards and waste mortar. However, during the renovation process, wood, plastic, metal and other impurities that affect the quality of recycled aggregates may be mixed in, so pre-treatment of renovation waste is required.

[0044] During the pretreatment process, wood and plastic are selected. The specific real-time process is: the decoration waste in the integrated raw material storage workshop is loaded into the raw material feeder through the transfer equipment. The raw material feeder can evenly spread the decoration waste on the raw material transmission belt. A vision-based sorting control module is deployed on the transmission belt to sort out the wood and plastic products in the decoration waste. The remaining decoration waste enters the next level of processing.

[0045] The transfer device, a loader in this embodiment, is used to transfer renovation waste from the integrated raw material storage workshop to the raw material feeder. The vision-based sorting control module primarily includes visual detection, using a visual sensor to capture images of the renovation waste on the conveyor belt and perform image recognition to detect wood and plastic within the waste. The sorting control terminal receives command information after image recognition and provides feedback to the sorting robot arm, ultimately completing the sorting operation.

[0046] It should be noted that the collection and pretreatment of decoration waste are carried out in the integrated raw material storage workshop, and sorted decoration waste is obtained.

[0047] S2, crushing the sorted decoration waste into a primary state and then screening it to obtain a first aggregate and a second aggregate; magnetically separating the first aggregate and the second aggregate using a magnetic separator; and controlling the magnetic separation current of the magnetic separator during the magnetic separation process.

[0048] The particle size of decoration waste is often large, basically between 0 and 600 mm. In order to improve the utilization rate of recycled aggregates, the sorted decoration waste is crushed using a crusher to convert large particles into small particles that can be operated.

[0049] Since the primary crushing is mainly aimed at crushing large pieces of concrete and bricks, a crusher with strong crushing force and strong processing capacity is required. Therefore, this embodiment uses an impact crusher to perform the crushing operation in the primary crushing. After the crushing is completed, the particle size of the decoration waste will be converted into 0-100mm.

[0050] The decoration waste after primary crushing contains recyclable debris and larger material blocks, so it needs to be screened using a screening device.

[0051] In this application, a drum screen is used for screening. The diameter of the drum screen is greater than 2m, the screen length is greater than 6m, the inclination angle is less than 10°, and the drum speed is between 5 and 18 rpm. Aggregates with a particle size of 0 to 31.5mm after screening are designated as the first aggregate, and aggregates with a particle size of 31.5 to 100mm after screening are designated as the second aggregate. In this embodiment, the drum screen has a diameter of 4m, a screen length of 8m, an inclination angle of 8°, and a drum speed of 10 rpm.

[0052] It should be noted that the dividing boundary of 31.5 mm between the first aggregate and the second aggregate is a preset particle size, which can be adjusted by the implementer according to actual conditions.

[0053] After primary crushing and screening, the renovation waste is converted into the first aggregate and the second aggregate. Some metal components, such as steel bars, nails, and metal fragments, may be mixed into the renovation waste. If the processed aggregate contains more metal components, it will seriously affect the strength and durability of the aggregate products. The specific reason is that the metal components are incompatible with the cement hydration reaction, affecting the normal coagulation and hardening of the cement, thereby affecting the strength of the concrete. At the same time, metals are easily corroded in a humid environment, resulting in a decrease in the bonding force between the aggregate and the cement, thereby affecting the durability of the concrete. In addition, unqualified metal component screening can easily lead to the release of heavy metal ions in the aggregate, exacerbating environmental pollution. Therefore, it is necessary to remove the metal components in the first aggregate and the second aggregate.

[0054] At present, electromagnetic roller belt magnetic separator is often used to separate metal components from aggregates. The structural diagram of electromagnetic roller belt magnetic separator is as follows: Figure 2 As shown, Figure 2 In the figure, 1 represents the feeder, 2 represents the feed trough, 3 represents the conveyor belt, 4 represents the electromagnetic roller, 5 represents the partition plate, 6 represents the sweeper, and 7 represents the driven wheel. In this embodiment, two magnetic separators are used to perform magnetic separation on the first aggregate and the second aggregate respectively to separate the metal components therein. The magnetic separator for magnetic separation of the first aggregate is denoted as the first magnetic separator, and the magnetic separator for magnetic separation of the second aggregate is denoted as the second magnetic separator. Magnetic separation current control modules are respectively deployed on the first magnetic separator and the second magnetic separator to control the magnetic separation current during the magnetic separation process of the magnetic separator, specifically:

[0055] S2.1, collecting the pressure at each preset position in the magnetic separator at each moment, and collecting the linear velocity of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment.

[0056] In the traditional magnetic separation process, a fixed alternating current is supplied to the first and second magnetic separators, causing their electromagnetic rollers to generate a magnetic field that can adsorb metal components on the belt surface, while other non-metallic components are separated by the partition plate based on inertia. During the rotation of the electromagnetic rollers, the metal components will be removed by the cleaner and screened out on the left side of the partition plate.

[0057] However, during actual operation of the magnetic separator, it was discovered that due to the difference in particle size between the first and second aggregates, the separation efficiency of the magnetic separator for the first and second aggregates was poor under the same fixed alternating current. Furthermore, due to the random distribution and content of metal components in the aggregates, the fixed magnetic field strength generated by the fixed alternating current could easily cause some metal to be applied to the sweeper, increasing resistance on the conveyor belt and affecting conveyor flow. To improve the quality of the recycled aggregate and magnetic separation, this embodiment implements automated control of the magnetic separator.

[0058] In this embodiment, N mechanical sensors are evenly spaced at the top of the sweepers of the first and second magnetic separators. The pressure applied to the mechanical sensors measures the amount of metal adsorbed by the electromagnetic rollers. Speed ​​sensors are used to measure the linear velocity of the electromagnetic rollers and the conveyor belt speed, respectively. The mechanical sensors and speed sensors are set to synchronize data acquisition, with a sampling interval of M. In this embodiment, N = 5 and M = 30 seconds. Implementers can set these values ​​based on their actual needs and this embodiment does not impose any restrictions.

[0059] S2.2, analyzing the change and dispersion of the pressure at all preset positions in the magnetic separator for the first aggregate at the current moment, and obtaining the resistance factor of the magnetic separator for the first aggregate at the current moment.

[0060] The first magnetic separator is designed for aggregates with a particle size of 0 to 31.5 mm, while the second magnetic separator is designed for aggregates with a particle size of 31.5 to 100 mm. The first and second aggregates will have different performances on the magnetic separators during the magnetic separation process. Specifically:

[0061] The first magnetic separator screens small aggregate particles, which primarily contain granular or dusty metal components. These metal components often deposit on the conveyor belt's surface during the shaking process. When these metal components reach the electromagnetic roller, they are firmly adsorbed on the conveyor belt surface. On the reverse side of the conveyor belt's rotating magnetic separation, at the bottom of the magnetic separator, they evenly contact the mechanical sensors on the sweeper. When the electromagnetic roller's magnetic field is strong, granular or dusty metal accumulates in front of the sweeper, gradually increasing its resistance. This allows analysis of the first magnetic separator's metal resistance to measure the matching of the current electromagnetic strength with metal screening.

[0062] In this embodiment, the resistance factor of the magnetic separator for the first aggregate at the current moment, that is, the first magnetic separator, is calculated as follows: Where A 1 is the resistance factor of the first magnetic separator at the current moment, is the average value of the pressure collected by the N mechanical sensors of the first magnetic separator at the current moment, F0 is the value of the mechanical sensor on the sweeper of the first magnetic separator when there is no aggregate for magnetic separation. Since the sweeper is in contact with the surface of the conveyor belt, there will also be a value on the mechanical sensor when there is no aggregate, and the surface of the conveyor belt is uniform, so the values ​​of all mechanical sensors are the same, σ is the degree of discreteness of the pressure collected by the N mechanical sensors of the first magnetic separator at the current moment, β is a preset value greater than 0, the purpose is to avoid the denominator being 0, in this embodiment β = 0.01, the implementer can set it according to the actual situation, and this embodiment does not limit it here. Recorded as the first difference.

[0063] It should be noted that in this embodiment, the degree of discreteness is calculated using variance, and the implementer can choose other existing feasible calculation methods, such as standard deviation, coefficient of variation, etc.; the greater the difference between the pressure collected on the sweeper of the first magnetic separator and the no-load pressure, and the smaller the deviation of all pressures, the greater the resistance of the first magnetic separator at this time.

[0064] S2.3, analyzing the pressure variation range at all preset positions in the magnetic separator for the second aggregate at the current moment, and the distances between the preset positions, to obtain a resistance factor of the magnetic separator for the second aggregate at the current moment.

[0065] The second magnetic separator screens larger aggregate particles. The actual flake or ribbon-like metal components contained within them are often distributed on the surface of the aggregate during conveying, compared to actual concrete or brick aggregate. As the metal components are gradually conveyed to the electromagnetic rollers, they are randomly absorbed onto the contact surface with the conveyor belt. When the conveyor belt rotates to the back, they may only come into contact with the portion applied to the sweeper. When the magnetic field of the electromagnetic rollers is strong, the flake or ribbon-like metal components become clogged on the sweeper's contact surface. Furthermore, as the magnetic separator operates, the metal components gradually accumulate, further affecting its efficiency. The pressure on the mechanical sensor on the sweeper of the second magnetic separator exhibits a wide distribution of values ​​and a radial pattern, with the maximum and minimum values ​​often far apart. This provides an analysis of the metal resistance of the second magnetic separator at the current moment.

[0066] In this embodiment, the resistance factor of the magnetic separator for the second aggregate at the current moment, that is, the resistance factor of the second magnetic separator, is calculated as follows: 2 =ρ+Δd; where A 2is the resistance factor of the second magnetic separator at the current moment, ρ is the pressure range detected by the N mechanical sensors of the second magnetic separator at the current moment, and Δd is the distance between the two mechanical sensors corresponding to the current range. ρ + Δd is the fusion result. Fusion combines multiple variables, specifically using addition, multiplication, or a combination of addition and multiplication.

[0067] It should be noted that, in this embodiment, the spacing is expressed by the number of mechanical sensors between the two mechanical sensors corresponding to the range. For example, if the range is calculated by the pressure values ​​corresponding to mechanical sensor No. 1 and mechanical sensor No. 3, then the spacing between mechanical sensor No. 1 and mechanical sensor No. 3 is 1.

[0068] S2.4, based on the resistance factor of the magnetic separator for the first aggregate and the resistance factor of the magnetic separator for the second aggregate at the current moment, combined with the difference between the linear velocity and the conveyor belt speed at the current moment, determine the magnetic separation current of the magnetic separator for the first aggregate and the magnetic separation current of the second aggregate, respectively.

[0069] Analysis of the metal resistance on the first and second magnetic separators reflects the degree of adjustment of the electromagnetic rollers in their current state. As metal accumulates, the magnetic field's attraction to the metal increases the belt's resistance, affecting the belt's speed. To further accurately control the magnetic separation accuracy, magnetic separation current regulation is necessary, taking into account the belt's operating conditions.

[0070] In a magnetic separator, the powered rollers often drive the conveyor belt. Ideally, the linear speed of the powered rollers matches the conveyor belt's operating speed. However, increased metal resistance or increased aggregate loading can cause a speed difference between the powered rollers and the conveyor belt. Aggregates are typically added evenly, so the metal resistance is the most direct factor affecting the roller linear speed and conveyor belt speed. A larger speed difference indicates greater conveyor belt resistance, necessitating adjustment of the magnetic force.

[0071] This embodiment sets the speed difference between the roller linear velocity and the conveyor belt speed to less than a preset threshold under normal circumstances, indicating that no intervention is required. At this point, the magnetic separator's current will continue to operate at the separator's upper operating current limit, as a stronger magnetic field improves metal separation. When the speed difference exceeds the preset threshold, indicating significant metal resistance, the magnetic field strength should be reduced to allow the metal components to be removed by the cleaner, improving operational smoothness. The preset threshold in this embodiment is 0.3, and implementers can adjust it based on actual circumstances. This embodiment does not impose any restrictions.

[0072] Therefore, when the speed difference between the electromagnetic roller linear velocity and the conveyor belt speed is greater than a preset threshold, for the first magnetic separator, the absolute value of the difference between the linear velocity of the electromagnetic roller and the conveyor belt speed at the current moment is calculated, and the product of the absolute value of the difference and the normalized resistance factor of the first magnetic separator is calculated as the adjustment weight of the first magnetic separator. The difference between the upper limit and the lower limit of the working current of the first magnetic separator is calculated and recorded as the first difference. The multiplication result of the adjustment weight of the first magnetic separator and the first difference is calculated, and the difference between the upper limit of the working current of the first magnetic separator at the current moment and the multiplication result is used as the magnetic separation current of the first magnetic separator at the current moment. In this embodiment, the Sigmoid function is used to obtain the normalized resistance factor of the first magnetic separator. The implementer can choose other existing feasible normalization methods.

[0073] For the second magnetic separator, the same calculation method as the first magnetic separator is used to obtain the magnetic separation current of the second magnetic separator at the current moment. The magnetic separation current control flow chart of the magnetic separator is as follows: Figure 3 shown.

[0074] Finally, based on the magnetic separation current calculated by the first magnetic separator and the second magnetic separator, the first magnetic separator and the second magnetic separator are controlled respectively, so as to improve the accuracy of magnetic separation and the operating efficiency of the magnetic separator, avoid interruption of decoration waste recycling due to blockage, and thus improve the removal accuracy of metal components in decoration waste.

[0075] S3, the second aggregate after magnetic separation is subjected to secondary crushing and then mixed with the first aggregate after magnetic separation for air separation; the aggregate after air separation is screened, and if there is aggregate larger than the preset particle size after screening, it is subjected to secondary crushing again to obtain aggregate meeting the preset particle size.

[0076] The aggregate particle size after magnetic separation by the second magnetic separator is relatively large, and thus needs to be further crushed. Therefore, the aggregate after magnetic separation by the second magnetic separator is subjected to secondary crushing by an impact crusher, with the aim of obtaining aggregate with a particle size of 0 to 31.5 mm.

[0077] After renovation waste is pre-processed and sorted, some organic matter may still remain, which will affect the quality of the final recycled aggregate. Therefore, the aggregate separated by the first magnetic separator and the aggregate after the second crushing are mixed and then separated by air using a vibrating air separator to ensure the quality of the aggregate.

[0078] In actual processing, there may be cases where aggregates are missed during processing by the impact crusher. Therefore, in this embodiment, the aggregates after air separation are screened. If there are still aggregates with a particle size larger than 31.5 mm after screening, the aggregates with a particle size larger than 31.5 mm are separately crushed again in the secondary stage, so that the particle size of the aggregates after air separation is less than 31.5 mm, thereby ensuring the uniform particle size of the recycled aggregates.

[0079] S4, aggregates meeting the preset particle size are crushed in three stages and sieved to obtain fine aggregate, medium aggregate and coarse aggregate.

[0080] According to the demand for different aggregates, this embodiment performs three-stage crushing on the aggregates after air separation. The three-stage crushing uses a hydraulic crusher with better crushing effect to further reduce the particle size of the aggregates.

[0081] The double-layered fluctuating screen is used to screen the aggregate after the third stage of crushing, with the purpose of screening out fine aggregate, medium aggregate and coarse aggregate. It should be noted that the upper screen hole of the double-layered fluctuating screen is 10mm, and the lower screen hole is 5mm. Therefore, the aggregate with a diameter of 0-5mm is regarded as fine aggregate, the aggregate with a diameter of 5-10mm is regarded as medium aggregate, and the aggregate with a diameter of 10-31.5mm is regarded as coarse aggregate. The production flow chart of recycled aggregate from decoration waste is as follows: Figure 4 shown.

[0082] At this point, the fine aggregate, medium aggregate and coarse aggregate are transported to the corresponding aggregate storage workshops respectively, completing the resource recycling of decoration waste.

[0083] Based on the same inventive concept as the above method, an embodiment of the present application also provides a renovation waste resource processing and production equipment, the equipment including a crusher, a screening device, a magnetic separator, a data acquisition module, and a magnetic separation current control module. The data acquisition module is used to collect the pressure at each preset position in the magnetic separator at each moment, as well as the linear speed of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment; the aggregate crushed by the crusher is transferred to the screening device for screening, and the screened aggregate is transferred to the magnetic separator for magnetic separation. A data acquisition module and a magnetic separation current control module are provided in the magnetic separator. After the data is collected, the data acquisition module inputs the data into the magnetic separation current control module for processing. The magnetic separation current control module implements the step of controlling the magnetic separation current in the magnetic separation process of the magnetic separator as described in the above-mentioned renovation waste resource processing and production method.

[0084] It should be noted that the order in which the embodiments of the present application are presented is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. Furthermore, the foregoing descriptions of specific embodiments of this specification are provided. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential sequence shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0085] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for recycling decoration waste, characterized in that: The method comprises the following steps: The sorted renovation waste is crushed and then screened to obtain a first aggregate and a second aggregate, wherein the particle size of the first aggregate is smaller than that of the second aggregate, the first aggregate contains granular or dusty metal components, and the second aggregate contains flaky or strip-shaped metal components; the first aggregate and the second aggregate are magnetically separated using a magnetic separator respectively; and the steps of controlling the magnetic separation current during the magnetic separation process of the magnetic separator are as follows: Collect the pressure at each preset position in the magnetic separator at each moment, and collect the linear speed of the electromagnetic roller of the magnetic separator and the conveyor belt speed at each moment; Analyzing the change and dispersion of the pressure at all preset positions in the magnetic separator for the first aggregate at the current moment to obtain a resistance factor of the magnetic separator for the first aggregate at the current moment, the resistance factor of the magnetic separator for the first aggregate being used to reflect the metal resistance experienced by the magnetic separator for the first aggregate at the current moment; the resistance factor of the magnetic separator for the first aggregate is determined based on a first difference and a dispersion of the pressure, the first difference being the difference between an average value of the pressure at all preset positions in the magnetic separator for the first aggregate at the current moment and the pressure when there is no aggregate in the magnetic separator; Analyze the pressure variation range at all preset positions in the magnetic separator for the second aggregate at the current moment, and the distance between the preset positions, to obtain a resistance factor of the magnetic separator for the second aggregate at the current moment; the resistance factor of the magnetic separator for the second aggregate is a fusion result of the range of the pressure at all preset positions in the magnetic separator for the second aggregate at the current moment and the distance between two preset positions corresponding to the range; Based on the resistance factor of the magnetic separator for the first aggregate and the resistance factor of the magnetic separator for the second aggregate at the current moment, combined with the difference between the linear velocity and the conveying speed of the conveyor belt at the current moment, respectively determine the magnetic separation current of the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment; The second aggregate after magnetic separation is subjected to secondary crushing and then mixed with the first aggregate after magnetic separation for air separation; the aggregate after air separation is screened, and if there is aggregate larger than a preset particle size after screening, it is subjected to secondary crushing again to obtain aggregate meeting the preset particle size; Aggregates that meet the preset particle size are crushed in three stages and sieved to obtain fine aggregate, medium aggregate and coarse aggregate.

2. A method for recycling decoration waste according to claim 1, characterized in that: The sorting is to evenly spread the decoration waste on the transmission belt and remove wood and plastic waste from the decoration waste.

3. The method for recycling decoration waste according to claim 1, wherein: The particle size of the first aggregate is 0-31.5 mm, and the particle size of the second aggregate is 31.5-100 mm.

4. The method for recycling decoration waste according to claim 1, wherein: The resistance factor of the magnetic separator of the first aggregate at the current moment is positively correlated with the first difference, and negatively correlated with the degree of dispersion of pressure.

5. The method for recycling decoration waste according to claim 1, wherein: The determining of the magnetic separation currents of the magnetic separators for the first aggregate and the second aggregate at the current moment respectively includes: For the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment, if the difference between their linear speeds and the conveyor belt transmission speeds is less than a preset threshold value, the magnetic separation currents of the magnetic separator for the first aggregate and the magnetic separator for the second aggregate at the current moment are their upper limits of operating currents; otherwise, for the magnetic separator for the first aggregate at the current moment, based on the difference between the linear speeds and the conveyor belt transmission speeds at the current moment and the resistance factor of the magnetic separator for the first aggregate, an adjustment weight for the magnetic separator for the first aggregate at the current moment is determined, and the product of the adjustment weight and the difference between the upper and lower limits of the operating current range of the magnetic separator is calculated; Determine the difference between the upper limit of the working current of the magnetic separator of the first aggregate at the current moment and the product as the magnetic separation current of the magnetic separator of the first aggregate at the current moment; The magnetic separation current of the magnetic separator for the second aggregate at the current moment is obtained based on the resistance factor of the magnetic separator for the second aggregate using the same method as that for the magnetic separation current of the magnetic separator for the first aggregate at the current moment.

6. The method for recycling decoration waste according to claim 1, wherein: The preset particle size is 31.5 mm, the fine aggregate is 0-5 mm, the medium aggregate is 5-10 mm, and the coarse aggregate is 10-31.5 mm.

7. A method for resource recovery and processing of decoration waste as described in claim 1, wherein the equipment for implementing the method is a decoration waste resource recovery and processing equipment, the equipment comprising a crusher, a screening device, a magnetic separator, a data acquisition module, and a magnetic separation current control module, the data acquisition module being used to collect the pressure of each preset position at each moment in the magnetic separator, as well as the linear speed of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment; the aggregate crushed by the crusher is transferred to the screening device for screening, and the screened aggregate is transferred to the magnetic separator for magnetic separation, the magnetic separator is provided with a data acquisition module and a magnetic separation current control module, and the data acquisition module collects data and inputs it into the magnetic separation current control module for processing, characterized in that The magnetic separation current control module implements the step of controlling the magnetic separation current during the magnetic separation process of the magnetic separator as described in claim 1.

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