Decoration waste resourceful treatment production equipment and method

Abstract

The invention relates to the technical field of decoration garbage resource recycling, in particular to decoration garbage resourceful treatment production equipment and method, and the method comprises the steps that decoration garbage is evenly scattered on a conveying belt; the decoration garbage on the conveying belt is sorted; the sorted decoration waste is subjected to primary crushing and then screened, and first aggregate and second aggregate are obtained; magnetic separation is conducted on the first aggregate and the second aggregate through a magnetic separator; controlling magnetic separation current in the magnetic separation process of the magnetic separator, performing secondary crushing on the magnetically separated second aggregate, mixing the magnetically separated second aggregate with the magnetically separated first aggregate, and performing winnowing; screening the winnowed aggregate, and if the aggregate with the particle size larger than the preset particle size exists after screening, performing secondary crushing on the aggregate again to obtain the aggregate meeting the preset particle size; the aggregate meeting the preset particle size is subjected to three-stage crushing and screening, and then fine aggregate, medium aggregate and coarse aggregate are obtained. Therefore, the quality of the recycled aggregate of the decoration garbage is improved.

Description

Technical Field

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

[0002] Decoration waste mainly comes from waste generated during house decoration, repair, and demolition, including concrete, bricks, gypsum boards, wood, and metal products. Traditional methods of disposing decoration waste mainly rely on landfill and incineration, which occupies a large amount of land resources and pollutes soil, water, and air. The resource-based treatment of decoration waste can not only effectively reduce environmental pollution, save resources, and reduce energy consumption, but also bring new growth points to the economy and promote the development of society in a greener and more sustainable direction.

[0003] In the existing resource processing of decoration waste, decoration waste is usually converted into recycled aggregate for aggregate 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 decoration waste is crushed at the primary level and then sieved 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 by 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 at each moment in the magnetic separator, and collect the linear speed of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment;

[0008] Analyze the change and discreteness of the pressure at all preset positions in the magnetic separator of the first aggregate at the current moment, and obtain the resistance factor of the magnetic separator of the first aggregate at the current moment;

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

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

[0015] Calculate the average value of the pressure at all preset positions in the magnetic separator of the first aggregate at the current moment, and calculate the difference between the average value and the pressure when there is no aggregate in the magnetic separator, which is recorded as the first difference;

[0016] Based on the first difference and the discrete degree, a resistance factor of a magnetic separator for the first aggregate at the 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 discrete degree.

[0018] In one embodiment, the determination of 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 of 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 of the second aggregate at the current moment is the fusion result of the range and the distance.

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

[0021] For the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment, if the difference between their line speed and the conveying speed of the conveyor belt is less than the preset threshold value, the magnetic separation current of the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment is the upper limit of their working current; otherwise, for the magnetic separator of the first aggregate at the current moment, based on the difference between the line speed and the conveying speed of the conveyor belt at the current moment and the resistance factor of the magnetic separator of the first aggregate, the adjustment weight of the magnetic separator of 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 working 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 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 screened 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 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 at each moment and the conveying speed of the conveyor belt; the aggregate crushed by the crusher is transmitted to the screening device for screening, and the screened aggregate is transmitted to the magnetic separator for magnetic separation. A data acquisition module and a magnetic separation current control module are arranged 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 comprises the following steps: evenly spreading decoration waste on a transmission belt; sorting the decoration waste on the transmission belt to remove wood and plastic from the decoration waste to avoid affecting the quality of recycled aggregate; first-stage crushing of the sorted decoration waste and screening to obtain a first aggregate and a second aggregate; magnetic separation of 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 the 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 of the second aggregate at the current moment is obtained by measuring the distance between the preset positions and the preset positions; based on the resistance factor of the magnetic separator of the first aggregate at the current moment and the resistance factor of the magnetic separator of the second aggregate, combined with the difference between the linear speed at the current moment and the conveying speed of the conveyor belt, the magnetic separation current of the magnetic separator of the first aggregate and the second aggregate at the current moment is determined respectively; the accuracy of the magnetic separation current control of the magnetic separator of the first aggregate and the second aggregate is improved, thereby improving the magnetic separation effect of the magnetic separator, and effectively removing the metal components in the first aggregate and the second aggregate; 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; the aggregate meeting the preset particle size is subjected to tertiary crushing, and fine aggregate, medium aggregate and coarse aggregate are obtained after screening, thereby improving the resource processing efficiency of decoration waste, and at the same time 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 in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. 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 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 schematic diagram of the structure 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 explain the technical means and effects adopted by this application to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, features and effects of a decoration waste resource processing production equipment and method proposed in this application in combination with the accompanying drawings and preferred embodiments. 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 in 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 a renovation waste resource processing production equipment and method provided by the present 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 decoration 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 the process of house decoration and repair. The collection and management of renovation waste is the key to urban governance. Based on fixed decoration waste dumping points in the community, transportation vehicles with closed compartments are used to transport the decoration waste in the community to the integrated raw material storage workshop, so as to realize the collection of scattered decoration waste in the city.

[0042] The purpose of the transport vehicles with closed compartments is to avoid dust or spillage during transportation, which would pollute the city. The integrated raw material storage workshop refers to the place where the decoration waste raw materials are piled up, so as to realize the stacking, transportation and temporary storage of raw materials.

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

[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 function of the transfer device is to transfer the decoration waste in the integrated raw material storage workshop to the raw material feeder. In this embodiment, the transfer device is a loader. The vision-based sorting control module mainly includes visual detection, which collects the decoration waste image on the transmission belt through the visual sensor, and detects the wood and plastic in it through image recognition. The sorting control end receives the instruction information after image recognition and feeds back to the sorting robot arm to finally realize the sorting action.

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

[0047] S2, 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; and controlling the magnetic separation current during the magnetic separation process of the magnetic separator.

[0048] The particle size of decoration waste is often larger, basically between 0 and 600 mm. In order to improve the utilization rate of recycled aggregates, the sorted decoration waste is crushed by 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 adopts an impact crusher for crushing 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, wherein the diameter of the drum screen is greater than 2m, the length of the screen is greater than 6m, the inclination angle is less than 10°, and the drum speed is 5-18r / min. The aggregate with a particle size of 0-31.5mm after screening is recorded as the first aggregate, and the aggregate with a particle size of 31.5-100mm after screening is recorded as the second aggregate. In this embodiment, the diameter of the drum screen is 4m, the length of the screen is 8m, the inclination angle is 8°, and the drum speed is 10r / min.

[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 the actual situation.

[0053] After primary crushing and screening, the decoration 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 in the decoration waste. If the processed aggregate contains more metal components, the strength and durability of the aggregate products will be seriously affected. The specific reason is that the metal components are incompatible with the cement hydration reaction, which affects the normal coagulation and hardening of cement, thereby affecting the strength of concrete. At the same time, metals are easily corroded in a humid environment, resulting in a decrease in the bonding force between aggregate and cement, thereby affecting the durability of concrete. In addition, unqualified metal component screening can easily lead to the release of heavy metal ions in the aggregate, aggravating 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 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 recorded as the first magnetic separator, and the magnetic separator for magnetic separation of the second aggregate is recorded 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 at each moment in the magnetic separator, and collecting the linear speed 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 magnetic separator and the second magnetic separator, so that their electromagnetic rollers generate a magnetic field, which can adsorb metal components on the belt surface, while other non-metallic components are separated by the partition plate according to inertia. During the rotation of the electromagnetic roller, the metal components will be removed by the cleaner, so that the metal components are screened out on the left side of the partition plate.

[0057] However, during the actual operation of the magnetic separator, it was found that due to the difference in particle size between the first aggregate and the second aggregate, the magnetic separation effect of the magnetic separator on the first aggregate and the second aggregate was poor under the same fixed alternating current. At the same time, since the content and distribution of metal components in the aggregate are random, the fixed magnetic field strength generated by the fixed alternating current can easily cause part of the metal to be applied to the sweeper, causing the resistance of the conveyor belt to increase and affecting the smoothness of the transmission. In order to improve the quality of recycled aggregate and magnetic separation, this embodiment performs automatic control on the magnetic separator.

[0058] In this embodiment, N mechanical sensors are evenly distributed at the top of the sweepers of the first magnetic separator and the second magnetic separator. The amount of metal components adsorbed by the electromagnetic roller is measured by the pressure on the mechanical sensor, and the linear speed of the electromagnetic roller and the conveying speed of the conveyor belt are obtained by the speed sensor. The mechanical sensor and the speed sensor are set to synchronous acquisition, and the sampling interval is M. In this embodiment, N==5, M==30s, and the implementer can set it according to the actual situation, and this embodiment does not limit it here.

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

[0060] The first magnetic separator is used for aggregates with a particle size of 0 to 31.5 mm, while the second magnetic separator is used 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 selects small-size aggregate particles, which mainly contain granular or dusty metal components, and the metal components are often deposited on the surface of the conveyor belt during the shaking transmission process on the conveyor belt. At this time, when the metal components reach the electromagnetic roller, they can be firmly adsorbed on the surface of the conveyor belt, and evenly contact the mechanical sensor on the sweeper when the conveyor belt rotates on the back of the magnetic separation, that is, the bottom of the magnetic separator. When the magnetic field strength of the electromagnetic roller is strong, granular or dusty metal will accumulate in front of the sweeper, making the resistance of the sweeper gradually increase. The metal resistance of the first magnetic separator is analyzed to measure the matching of the current electromagnetic strength and metal screening.

[0062] In this embodiment, the resistance factor of the magnetic separator of the first aggregate at the current moment, that is, the first magnetic separator, is calculated in the following specific manner: In the formula, 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, F 0is 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. Therefore, the values ​​of all mechanical sensors are the same. σ is the discrete degree 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. 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 may 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, it means that the resistance of the first magnetic separator is greater at this time.

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

[0065] The second magnetic separator screens aggregate particles with larger particle sizes. The actual sheet or strip metal components contained therein are often distributed on the surface of the aggregate during the transmission process, compared with the actual concrete or brick aggregates. When the metal components are gradually transmitted to the electromagnetic roller, the metal components will be randomly adsorbed on the contact surface with the conveyor belt. When the conveyor belt rotates to the back, it may only contact the part applied to the sweeper. When the magnetic field of the electromagnetic roller is large, the sheet or strip metal components will be blocked on the contact surface of the sweeper. At the same time, as the magnetic separator runs, the metal components will gradually pile up, further affecting the operation efficiency of the magnetic separator. At this time, the pressure of the mechanical sensor on the sweeper of the second magnetic separator is manifested as a large difference in the distribution of numerical values, and presents a radial distribution, that is, the maximum and minimum values ​​are often far apart. This analyzes the metal resistance of the second magnetic separator at the current moment.

[0066] In this embodiment, the resistance factor of the magnetic separator of the second aggregate at the current moment, that is, the resistance factor of the second magnetic separator, is calculated in the following specific manner: A 2 =ρ+Δd; where A 2 is the resistance factor of the second magnetic separator at the current moment, ρ is the range of pressure collected 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 range at the current moment. ρ+Δd is the fusion result. Fusion means combining multiple variables, which can be calculated by addition, multiplication, or a combination of addition and multiplication.

[0067] It should be noted that the spacing in this embodiment is expressed by the number of mechanical sensors between the two mechanical sensors corresponding to the range. For example, the range is calculated by the pressure values ​​corresponding to mechanical sensor No. 1 and mechanical sensor No. 3, and 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 of the first aggregate and the resistance factor of the magnetic separator of the second aggregate at the current moment, combined with the difference between the line speed at the current moment and the conveying speed of the conveyor belt, determine the magnetic separation current of the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment respectively.

[0069] By analyzing the metal resistance on the first and second magnetic separators, the adjustment degree of the electromagnetic rollers in the current state can be reflected. When the metal accumulates, the magnetic field attracts the metal, which increases the resistance of the belt and affects the belt speed. In order to further accurately control the accuracy of magnetic separation, it is necessary to adjust the magnetic separation current in combination with the operation of the belt.

[0070] In magnetic separators, the power roller often drives the conveyor belt to run. Therefore, ideally, the linear speed of the power roller is consistent with the running speed of the conveyor belt. However, when the metal resistance increases or the amount of aggregate being conveyed increases, there will be a speed difference between the linear speed of the power roller and the running speed of the conveyor belt. Aggregates are often added evenly, so the most direct influence of the roller linear speed and the conveyor belt speed is the metal resistance. If the speed difference between the two is larger, it means that the resistance to the running of the conveyor belt is greater at this time, and the magnetic force needs to be adjusted.

[0071] In this embodiment, the speed difference between the roller linear speed and the conveyor belt speed is set to be less than the preset threshold under normal circumstances, indicating that no intervention is required. At this time, the magnetic separation current of the magnetic separator will continue to operate at the upper limit of the working current of the magnetic separator, because the greater the magnetic field strength, the better the metal separation effect. When the speed difference is greater than the preset threshold, it indicates that the metal resistance is large at this time. At this time, the magnetic field strength should be reduced so that the metal components can be removed by the sweeper to improve the running smoothness. The preset threshold in this embodiment is 0.3, and the implementer can adjust it according to the actual situation. This embodiment does not limit it here.

[0072] Therefore, when the speed difference between the electromagnetic roller linear speed and the conveyor belt speed is greater than the preset threshold, for the first magnetic separator, the absolute value of the difference between the linear speed 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, and the difference between the upper limit of the working current of the first magnetic separator and the lower limit of the working current is calculated, recorded as the first difference, and 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, and 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 renovation waste recycling due to blockage, and thereby improve the removal accuracy of metal components in renovation 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, in order to obtain aggregate with a particle size of 0 to 31.5 mm.

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

[0078] In the actual process, there may be cases where aggregates are missed during processing by the impact crusher. Therefore, in this embodiment, the aggregates after air selection 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 for the second time, so that the particle size of the aggregates after air selection is less than 31.5 mm, thereby ensuring the uniform particle size of the recycled aggregate.

[0079] S4, aggregates meeting the preset particle size are crushed in three stages, and fine aggregate, medium aggregate and coarse aggregate are obtained after screening.

[0080] According to the demand for different aggregates, this embodiment performs three-stage crushing on the aggregates after air selection. 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, and its purpose is to screen 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 of 0-5mm is regarded as fine aggregate, the aggregate of 5-10mm is regarded as medium aggregate, and the aggregate 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 respectively transported to the corresponding aggregate storage workshops to complete 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 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 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 at each moment and the conveying speed of the conveyor belt; the aggregate crushed by the crusher is transmitted to the screening device for screening, and the screened aggregate is transmitted to the magnetic separator for magnetic separation, a data acquisition module and a magnetic separation current control module are arranged in the magnetic separator, and after the data acquisition module collects data, it is input into the magnetic separation current control module for processing, and 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 above sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some 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 referenced to each other, and 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 substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for recycling decoration waste, characterized in that: The method comprises the following steps: The sorted decoration waste is crushed at the primary level and then sieved 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 by 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 at each moment in the magnetic separator, and collect the linear speed of the electromagnetic roller of the magnetic separator and the conveying speed of the conveyor belt at each moment; Analyze the change and discreteness of the pressure at all preset positions in the magnetic separator of the first aggregate at the current moment, and obtain the resistance factor of the magnetic separator of the first aggregate at the current moment; Analyze the pressure variation range of all preset positions in the magnetic separator of the second aggregate at the current moment, and the distance between the preset positions, to obtain the resistance factor of the magnetic separator of the second aggregate at the current moment; Based on the resistance factor of the magnetic separator of the first aggregate and the resistance factor of the magnetic separator of the second aggregate at the current moment, combined with the difference between the linear speed and the conveying speed of the conveyor belt at the current moment, respectively determine the magnetic separation current of the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment; 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.

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

3. A method for recycling decoration waste as claimed in claim 1, characterized in that: 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. A method for recycling decoration waste as claimed in claim 1, characterized in that: The determination of the resistance factor of the magnetic separator of the first aggregate at the current moment includes: Calculate the average value of the pressure at all preset positions in the magnetic separator of the first aggregate at the current moment, and calculate the difference between the average value and the pressure when there is no aggregate in the magnetic separator, which is recorded as the first difference; Based on the first difference and the discrete degree, a resistance factor of a magnetic separator for the first aggregate at the current moment is determined.

5. A method for recycling decoration waste as claimed in claim 4, characterized in that: 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.

6. A method for recycling decoration waste as claimed in claim 1, characterized in that: The determination of the resistance factor of the magnetic separator of the second aggregate at the current moment includes: The range of the pressure at all preset positions in the magnetic separator of 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 of the second aggregate at the current moment is the fusion result of the range and the distance.

7. A method for recycling decoration waste as claimed in claim 1, characterized in that: The method of respectively determining the magnetic separation current of the magnetic separator for the first aggregate and the second aggregate at the current moment includes: For the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment, if the difference between their line speed and the conveying speed of the conveyor belt is less than the preset threshold value, the magnetic separation current of the magnetic separator of the first aggregate and the magnetic separator of the second aggregate at the current moment is the upper limit of their working current; otherwise, for the magnetic separator of the first aggregate at the current moment, based on the difference between the line speed and the conveying speed of the conveyor belt at the current moment and the resistance factor of the magnetic separator of the first aggregate, the adjustment weight of the magnetic separator of 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 working 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 the magnetic separation current of the magnetic separator for the first aggregate at the current moment.

8. The method for recycling decoration waste as claimed in claim 1, characterized in that: 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: 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 screened to obtain fine aggregate, medium aggregate and coarse aggregate.

9. A method for recycling decoration waste as claimed in claim 8, characterized in that: 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.

10. A kind of renovation waste resource processing production equipment, the equipment 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 at each time in the magnetic separator, as well as the linear speed of the electromagnetic roller of the magnetic separator at each time and the conveying speed of the conveyor belt; the aggregate crushed by the crusher is introduced into the screening device for screening, and the screened aggregate is introduced into the magnetic separator for magnetic separation. The data acquisition module and the magnetic separation current control module are arranged in the magnetic separator. After the data is collected by the data acquisition module, it is input 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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