11308results about "Plastic recycling" patented technology

The invention provides a method for recovering a BHET monomer from a waste polyester textile alcoholysis solution, and is characterized in that the recovery method comprises the following steps: (1) filtering: mixing the waste polyester textile alcoholysis solution with water under a stirring condition, and filtering at 55-70 DEG C; and (2) cooling crystallization: under a stirring condition, carrying out primary cooling on the filtrate obtained by filtering in the step (1) from 55-70 DEG C to 45-55 DEG C, then adding a BHET seed crystal, then carrying out secondary cooling to 5-15 DEG C, and maintaining the temperature for 20-60 min to obtain the BHET monomer. The mixed solution cooling crystallization method is developed on the basis of complexity of components of the waste polyester textile fabric, the problems that in the conventional production process, a BHET crystal product is low in quality, prone to scaling, difficult to filter and dry and the like are solved, and the obtained BHET product is large in particle size, narrow in particle size distribution, high in purity, good in fluidity and high in stability.

Chemical recycling facilities for processing mixed plastic waste are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy generation / energy production facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

The invention relates to the technical field of injection molding waste plastic recovery, in particular to injection molding equipment and a process for producing plastic automobile ornaments. The equipment comprises an injection machine and an online recycling mechanism, the injection machine is provided with a double-channel solution cavity composed of a new material main runner and a waste material returning cavity, and the tail ends of the two channels converge in a 30-degree Y shape; the on-line recovery mechanism comprises a waste conveyor belt, a crushing mechanism and a transmission device, a magnetic separation impurity removal device is arranged in the crushing mechanism, and a discharge end is connected with the batching mechanism. Through double channels and a Y-shaped confluence structure, production waste is subjected to online recovery and crushing and then is fused, mixed and reused with new materials, the waste utilization rate is increased, and the cost is reduced. The magnetic separation and impurity removal device efficiently removes metal impurities through the movement of inclined avoiding, rotary impurity scraping and inclined discharging of a scraping plate; the batching mechanism removes dust to prevent impurities from affecting melt performance. The crushing device adapts to different waste materials, airflow assists discharging to improve the efficiency, and the green production concept is met.

The utility model belongs to the technical field of carbon molecular sieve production equipment, and discloses a flower mud material crushing conveyor line which comprises crushing equipment, a bottom belt conveyor, an inclined lifting belt conveyor and a vibrating screen, a sunken main pit is formed in the workshop ground of a flower mud crushing station, the crushing equipment is installed in the main pit, and the inclined lifting belt conveyor is installed in the main pit. A feeding hopper of the crushing equipment is removed towards the outer side wall, and the bottom of the feeding hopper is connected through a horizontal steel plate, extends and is connected to the workshop ground in a lap joint mode. The bottom belt conveyor is horizontally connected below a discharge port of the crushing equipment, the bottom end of the inclined lifting belt conveyor is connected at the discharge end of the bottom belt conveyor, and the high end of the inclined lifting belt conveyor inputs crushed flower mud materials to a feed port of the vibrating screen. According to the flower mud material crushing conveying line, crushing equipment is installed in a pit mode, the feeding difficulty is lowered, and the operation safety is improved.

The invention relates to a microbacterium ester, a microbial preparation thereof and a method for degrading plastics by using the microbacterium ester, the strain is microbacterium ester 2A3-D1, the microbacterium ester is registered in China General Microbiological Culture Collection Center on June 19, 2025, and the preservation number is CGMCC No.34950. The invention further discloses a method for degrading plastics by using the microbacterium ester. The invention relates to a microbial preparation containing microbacterium esterotorum 2A3-D1 as an active component. The invention relates to a method for degrading polyethylene and polypropylene micro-plastics by utilizing microbacterium esteroflavus 2A3-D1. The strain can grow by taking polyethylene and polypropylene micro-plastics as a unique carbon source, and has the capability of degrading the polyethylene and polypropylene micro-plastics. The method is applied to degradation of polyethylene and polypropylene plastics in a river in-situ environment, and has a wide application prospect.

The invention discloses a method for degrading polystyrene (PS) plastic and upgrading and recycling the PS plastic into benzoic acid based on nano MnO2 photocatalytic ozonation, and belongs to the technical field of solid waste recycling. The method comprises the following steps: firstly, mixing PS plastic fragments with nano MnO2 and an organic solvent, then simultaneously introducing ozone into a reaction system at normal temperature and normal pressure, and irradiating with light. Through synergistic catalysis of light and ozone, molecular chains of the PS plastic can be efficiently and selectively broken and oxidized, and finally the PS plastic is directionally converted into benzoic acid with high additional value. After the reaction is finished, a benzoic acid product can be obtained through simple separation, concentration and purification steps. The method provided by the invention realizes high-valued recycling of the waste PS plastic under mild conditions, solves the problems of high energy consumption, complex products, easy generation of secondary pollution and the like in a traditional treatment method, and has the outstanding advantages of green process, efficient reaction, high product value and the like.

The invention relates to the field of waste plastic recycling, and discloses plastic film recycling equipment which is used for cleaning and recycling broken plastic films. Comprising a cleaning pool, an inclined conveying belt is arranged at the tail end of the cleaning pool, water filtering holes are formed in the conveying belt, and an extrusion component is arranged on the conveying belt; and the fished-out fragments are extruded by the extrusion part, so that the drainage speed of the fragments is accelerated, and the subsequent recovery processing step is ensured to be smoothly carried out. A traditional conveying belt drains water only by means of gravity, and water in wet plastic fragments and between layers is difficult to effectively discharge, so that the water yield is large. The intermittent extrusion action is introduced in the operation cycle of the conveying belt, and the'wet cake 'structure formed by the surface tension of a water film of the wet material is destroyed in the squeezing process, so that the moisture is easier to release, the initial moisture content of the material is greatly reduced, the load of subsequent centrifugal dewatering or hot air drying equipment is effectively reduced, and the energy consumption and the operation cost are remarkably reduced.

The invention relates to the technical field of plastic waste recycling, in particular to a waste recycling device for plastic processing. Comprising a machining table, the top end of the machining table is provided with a feeding conveying belt used for conveying waste to be treated, the machining table is provided with a treatment bin, a feeding groove is formed in the side, close to the feeding conveying belt, of the treatment bin, and a circulating screening mechanism used for screening the crushed waste is arranged in the treatment bin; waste materials to be treated are fed into the feeding hopper through the feeding conveying belt via the feeding groove, the waste materials are crushed through the crushing mechanism, the crushed waste materials are screened through the circulating screening mechanism, the crushed waste materials are subjected to secondary crushing through the crushing mechanism, and therefore automatic circulating crushing of the waste materials is achieved; manual operation is not needed in the whole process, crushing, screening, secondary crushing and conveying are automatically conducted, the crushing quality is greatly improved, and meanwhile the workload of workers is relieved.

The automatic laser engraving equipment comprises a tire conveying mechanism, L-shaped fixed supporting plates are arranged on the two longitudinal sides of the tire conveying mechanism, a fixed mounting frame is arranged between the tops of the L-shaped fixed supporting plates, and a laser engraving assembly is slidably connected between the two transverse ends of the top of the fixed supporting frame in the longitudinal direction; an overturning assembly is arranged on one longitudinal side of the laser engraving assembly and is in sliding connection with the top of the fixed mounting frame in the longitudinal direction. The device has the beneficial effects that the device is reasonable in design, stable and firm in overall structure and high in practicability; the rubber tire laser engraving device is simple in structure, convenient to use, capable of achieving double-face laser engraving of the rubber tire and improving the rubber tire production and machining efficiency, capable of positioning and clamping the rubber tire so as to guarantee the position stability of the rubber tire in the laser engraving machining process and improve the effect and precision of laser engraving machining of the rubber tire, and suitable for application and popularization.

The invention discloses an efficient purification method of rBHET, and belongs to the technical field of waste polyester recycling. A reaction raw material obtained after premixing of waste PET polyester raw material particles and a catalyst and ethylene glycol are jointly and continuously introduced into a depolymerization reactor, the reaction raw material and ethylene glycol in the depolymerization reactor are mixed and pass through a plurality of rotating discs, and the materials form a flowing film on the rotating discs rotating at a high speed to promote depolymerization; depolymerization reaction liquid generated in the depolymerization reactor enters a temporary storage tank to be stored after being subjected to impurity removal, the depolymerization reaction liquid in the storage tank is introduced into a rectifying tower to be primarily concentrated and purified, obtained concentrated liquid enters an evaporator to be secondarily concentrated and purified, obtained secondary concentrated liquid enters a cooler to be cooled and then enters a product tank to be crystallized; and drying the crystallized solid to obtain a high-purity rBHET product. According to the method, the production efficiency is improved, and the purity of rBHET is effectively improved.

The invention discloses a cracking dechlorination catalyst as well as a preparation method and application thereof. The cracking dechlorination catalyst comprises zeolite, an adsorbent and a carrier, the zeolite is selected from at least one of an MFI structure, an FAU structure and an MEL structure; the adsorbent is selected from at least one of metal oxide and carbonate; and the carrier is selected from one of a carbon material and carbide. The invention provides a catalyst for one-step catalytic cracking-dechlorination of waste plastics, which can realize oil recovery and chlorine impurity removal in one step in catalytic cracking of chlorine-containing waste plastics.

This invention discloses a method for catalytically depolymerizing polyethylene terephthalate (PET) to prepare terephthalate. Under catalyst-free conditions or with a salt as a catalyst, PET or its composite system is treated in diester carbonate to achieve chemical depolymerization of PET, yielding PET monomers terephthalate and ethylene carbonate, and achieving complete depolymerization of PET in the composite. This invention, through the reaction of diester carbonate with PET, enables the depolymerization of PET under mild conditions, and further facilitates the research and development of related technologies for the chemical recovery of PET monomers from PET composite or mixed systems. The method provided by this invention has advantages such as high efficiency, environmental friendliness, and mild reaction conditions, and can catalyze the depolymerization of PET to generate its monomer terephthalate, possessing strong industrial application value.

The utility model relates to a rinsing, separating and precipitating device for waste plastic particles. The rinsing, separating and precipitating device comprises a cleaning pool, a spiral discharging mechanism arranged at the bottom of the cleaning pool, a stirring mechanism arranged at the top of the cleaning pool and a stirring and sweeping mechanism located at the end of the cleaning pool. A feeding cavity is formed in one end of the cleaning pool, a discharging cavity is formed in the other end of the cleaning pool, and a discharging outlet is formed in the bottom of the cleaning pool; the material stirring mechanism comprises a plurality of first material stirring assemblies and second material stirring assemblies which are located between the feeding cavity and the discharging cavity, and a material stirring driving unit for driving the first material stirring assemblies and the second material stirring assemblies to rotate, and the second material stirring assemblies are close to the discharging cavity; the shifting and sweeping mechanism is located on the side, away from the second shifting assembly, of the discharging cavity. According to the rinsing, separating and precipitating device for the waste plastic particles, the problem that the plastic particles cannot smoothly slide into the discharging cavity from the shifting plate can be solved, and the rinsing and discharging efficiency is improved.

The invention belongs to the technical field of shoe sole waste recycling treatment, and discloses a shoe sole processing waste recycling device which comprises a crushing box, two groups of crushing rollers are rotatably arranged on the inner side of the crushing box, linkage pressure applying assemblies are arranged on the two sides of the crushing rollers, and each linkage pressure applying assembly comprises two groups of limiting guide columns. According to the crushing device, through cooperation of structures such as the linkage pressure applying assembly and the crushing rollers, power can be provided for the pressure applying device when the crushing rollers rotate, it is guaranteed that downward pressure is provided while the crushing rollers rotate, and the crushing efficiency is improved; and therefore, the problems that the normal crushing treatment is influenced due to accumulation or clamping stagnation caused by the fact that rubber cannot be quickly concentrated between the crushing rollers, and the working pressure of workers is greatly increased are effectively solved.

The recycled bis(4-hydroxybutyl) terephthalate according to one embodiment has a low amount of residual ethylene glycol derivatives and can therefore be used as a polymerization raw material for high crystallinity engineering polyester products or biodegradable polyesters, offering superior qualities, for example, color.

The invention belongs to the technical field of plastic processing, and particularly relates to a waste plastic regenerated particle precise homogenizing tank system which comprises a tank body with a main feeding port and a discharging port, a support used for supporting the tank body and a homogenizing mechanism arranged on the tank body. The rotating directions of the central main spiral stirring rod and the two annular wall convection spiral stirring rods are opposite, and the central main spiral stirring rod and the two annular wall convection spiral stirring rods are used for performing three-dimensional mixing on plastic particles. According to the precise homogenizing tank system for the waste plastic regenerated particles, the homogenizing mechanism is arranged, and a driving gear is meshed with two driven gears, so that plastic particles in the tank body are mixed by a central main spiral stirring rod and two annular wall convection spiral stirring rods which are opposite in rotating direction; and a driven gear is matched to annularly move along the inner wall of the inner gear ring, so that a high-strength and dead-corner-free three-dimensional mixed flow field is constructed, and high-precision and high-efficiency homogenization of waste plastic particles in the aspects of color, component and density is realized.

The utility model relates to the field of agricultural machinery, in particular to a residual film picking and recycling straw beating machine, which comprises a main frame, a traction frame and traveling wheels, and a straw beating device, a residual film picking roller, a packing device and a transmission device are arranged on the main frame. The plastic film residue picking roller is characterized by structurally comprising a track disc device, a roller body, a center transmission rotating shaft, a shaft disc, a roller side plate, a film picking elastic tooth set, a film picking crank and a crank roller. The machine is reasonable in structure, economical and practical, and can realize the combined operation of picking, recycling and packaging the residual films and smashing and returning the straws to the field; in the picking process, the residual film picking roller can be utilized, the burden is small, the overall flexibility of the picking roller can be effectively improved, and the residual film picking operation efficiency is greatly improved; the special suspension traction frame is utilized to solve the actual problem that an included angle formed between power input and a transmission shaft is too small, and backward transmission of the locomotive is not facilitated, and flexible connection steering and transmission between the traction locomotive and the operation agricultural machine can be achieved.

The invention relates to a method for catalytically degrading a polyester material by using an ionic liquid and application of the polyester material, and mainly solves the technical problems of high energy consumption, environment unfriendliness and complex process in polyester material recovery research in the prior art. According to the technical scheme, the novel method for catalytically degrading the polyester material through the ionic liquid comprises the steps that the ionic liquid is used as a catalyst, diol is used as an alcoholysis agent, polyester is catalytically degraded, and the ionic liquid has the following general formula: A + B-(I); in the formula, A < + > is an organic alkali cation, and B <-> is an alkoxy anion, the problem is well solved, and the method can be applied to polyester recovery industry.

The invention provides a multi-stage identification plastic automatic separation and winnowing electrostatic synergistic separation system and method, and relates to the technical field of solid waste resourceful treatment. The system comprises an intelligent bag breaking and feeding module, a paving and shaping light source enhancing module, an AI identifying and stripping module, a wet material drying module, a negative pressure winnowing module, a high-voltage electrostatic deflection module and a multi-path collecting and outputting module. According to the system, automatic feeding and bag body breaking of household garbage are achieved, plastic materials capable of being recognized are spread to reduce the overlapping rate, efficient classification is conducted through the AI technology, and accurate sorting is conducted through wet drying and electric field electrostatic deflection. The plastic sorting efficiency is effectively improved, and equipment energy consumption and occupied space are reduced.

The invention relates to the technical field of visual inspection, and particularly discloses a visual control system and method for plastic bottle sorting based on visual inspection, and the method comprises the following steps: S1, starting a camera when a plastic bottle is detected, and calculating the imaging time; s2, obtaining an exposure value of the imaging picture, presetting an exposure interval, marking abnormal pixel points, calculating the proportion of the abnormal pixel points, and carrying out preliminary screening on the plastic bottles based on the proportion of the abnormal pixel points; s3, marking to-be-sorted bottles, arranging an NIR sensor, emitting near-infrared light when the to-be-sorted bottles pass, acquiring a spectrum reflected by the to-be-sorted bottles, and determining wavelengths of absorption peaks corresponding to the to-be-sorted bottles based on the spectrum; and S4, the materials of the bottles to be sorted are determined based on the wavelengths, the total time and distance coefficient are calculated, and the plastic bottles are blown out through the corresponding air valves to complete sorting. The sorting efficiency is improved, the labor cost is reduced, and meanwhile, the false drop rate can be further reduced through automatic work of a machine.

The invention provides a method 100 for separating different polymeric spectacle lens materials in a mixture comprising at least two different polymeric spectacle lens materials by separating at least one polymeric spectacle lens material of the at least two different polymeric spectacle lens materials by using their different physical behavior and / or chemical behavior, wherein the at least two different polymeric spectacle lens materials are selected from the group consisting of polyallyl carbonate, polyurea, polyurethane, polyurethane / polyurea, polycarbonate, polyepisulfide and polythiourethane. The invention further provides a method for separating at least one polythiourethane from a mixture comprising at least two different polythiourethanes by thiolysis.

The invention provides rubber-plastic composite modified asphalt suitable for low-temperature regions and a preparation method thereof, and belongs to the technical field of modified asphalt preparation. The modified asphalt is prepared from matrix asphalt, rubber powder, polyethylene and a compatibilizer, the content of the rubber powder is 15%-25% of the weight of the matrix asphalt, the content of the polyethylene is 4%-6% of the weight of the matrix asphalt, and the content of the compatibilizer is 5%-15% of the weight of the matrix asphalt; the preparation method comprises the following steps: heating the matrix asphalt to a flowing state, adding the rubber powder, stirring and swelling for 60 minutes, adding the polyethylene and the compatibilizer, stirring, and shearing at a high speed of 5000r / min for 45-60 minutes. Through rubber and plastic compound modification, the low-temperature crack resistance, the high-temperature stability and the water stability are excellent, the storage stability is good, the cost and pollution are reduced by utilizing waste materials, the process is simple, and the low-temperature road pavement material is suitable for road engineering in low-temperature areas.

This invention discloses a cutting device for plastic woven bags, comprising a frame, a drive mechanism, a conveying mechanism, and a cutting mechanism. The conveying mechanism includes a base, a conveying roller, and a pressing roller. The conveying roller includes a front roller and a rear roller. The base is fixedly mounted on the frame. The pressing roller, the front roller, and the rear roller are arranged sequentially above the base along the conveying direction of the plastic woven bag and are rotatably connected to the frame. The pressing roller, the front roller, and the rear roller are each driven to rotate by the drive mechanism mounted in the frame. The cutting mechanism is mounted on the frame between the front roller and the rear roller, and is located directly above the base. Using the cutting device of this invention, a thermal cutting method is employed, which not only provides a good cutting effect but also facilitates subsequent processes, effectively reduces processing costs, and avoids the emission of pungent odors during the cutting stage, achieving energy conservation and environmental protection. It has high processing efficiency, a simple overall structure, and is easy to operate, making it suitable for widespread application.

The invention discloses a waste polyurethane material recovery method and a preparation method of a polyurethane product, and belongs to the technical field of waste polyurethane material recovery and reutilization. The recovery method comprises the following steps: a powder preparation stage: crushing a waste polyurethane material by using crushing equipment to obtain polyurethane powder; a premixed liquid preparation stage: mixing polyurethane powder with a degradation agent, a catalyst and a cosolvent in proportion, and uniformly mixing through stirring equipment to obtain a premixed liquid with a certain powder content; in the degradation stage, equipment with a mechanical shearing and extruding function is used for grinding, extruding and shearing the premixed liquid, the reaction process is carried out within a set temperature range, and degradation mixed liquid of the polyurethane material is obtained after the reaction is completed. In the preparation method of the polyurethane product, a part of or all of the polyol raw material adopts a degradation mixed solution. According to the method, the degradation process is low in reagent consumption, low in temperature and short in time, does not need gas protection, and does not generate toxic substances such as aromatic amine, and the obtained high-performance heterogeneous polyhydric alcohol can be directly used for preparing polyurethane products without any post-treatment process.

The invention relates to the technical field of plastic recycling, in particular to a rinsing and separating device and a production line for regenerated plastics, the rinsing and separating device comprises a rinsing tank, a cleaning area is arranged in the rinsing tank, and a circulating conveying mechanism is vertically arranged in the cleaning area; the circulating conveying mechanism divides the cleaning area into a material passive sinking area on the front side and a plastic automatic floating area on the rear side. And a rotary channel for the material shifting assembly to pass through in a rotary manner is arranged between the passive material sinking area and the automatic plastic floating area. The circulating conveying mechanism is vertically arranged in the cleaning area, and the plastic is forcibly pushed to sink into the bottom of the water tank in the descending process by utilizing the material stirring assembly fixed on the conveying belt, so that the plastic is fully and deeply sunk in the passive sinking area, and then enters the automatic floating area through the rotary channel to complete flotation separation; therefore, the problems of incomplete impurity separation and poor cleaning effect caused by shallow water flow disturbance and short water sinking time of the existing regenerated plastic rinsing equipment are effectively solved.

The invention relates to the technical field of automobile part processing, and particularly discloses an automobile part recycled plastic particle premixing and modifying device which comprises a base, the top of the base is fixedly connected with a smashing box through a first supporting column, a smashing assembly is installed in the smashing box, and the top of the base is fixedly connected with a mixing cylinder; lifting assemblies are symmetrically mounted on the outer side wall of the mixing barrel, a lifting seat is mounted at the top of the mixing barrel through the lifting assemblies, a stirring assembly is mounted at the top of the lifting seat, transmission shafts are symmetrically and rotationally connected to the bottom of the lifting seat, and stirring rollers are in threaded connection to the bottoms of the transmission shafts through mounting assemblies. The damaged stirring roller can be independently replaced without complex disassembly of the whole device, the maintenance time is greatly shortened, the maintenance difficulty is reduced, the stirring rollers suitable for different formulas or processes can be flexibly switched, and the diversified and batch production requirements of automobile parts are met.

The invention belongs to the technical field of fiber reinforced composite material recovery, and particularly relates to a full-process recovery method of a fiber reinforced composite material. The modified fiber is prepared by constructing a dynamic coordination crosslinking interface layer formed by Co < 2 + > and phenolic hydroxyl groups and amino groups in polydopamine on the surface of the fiber. And then, preparing the fiber reinforced composite material by taking the modified fiber and resin as raw materials. A fiber reinforced composite material is placed in a coordination competitor, cobalt-oxygen and cobalt-nitrogen coordination bonds of an interface layer are competitively dissociated and interface bonding is destroyed under the heating condition by utilizing the stronger coordination capacity of the coordination competitor to Co < 2 + >, and then ultrasonic treatment is assisted, so that efficient and nondestructive separation of fibers and a resin matrix is realized. The process method is simple, convenient to operate, green and environmentally friendly, and has important practical significance and industrial application prospects.

The invention belongs to the technical field of enzyme engineering, and discloses a PETase-PHL7 mutant and an application thereof. The invention provides a PETase-PHL7 mutant, the amino acid sequence of the PETase-PHL7 mutant is shown as SEQ ID No.3, and the PETase-PHL7 mutant is marked as a mutant YPT. Compared with a mutant H185Y, the PET degradation activity of the mutant is improved by 55.6%, and the Tm is improved by 0.35 DEG C. On the basis of the mutant YPT, the amino acid of the mutant YPT is further subjected to mutation design, and six PETase-PHL7 mutants are provided. Compared with the mutant YPT, the PETase-PHL7 mutant provided by the invention has the advantages that the PET (Polyethylene Terephthalate) degradation activity is improved by 55.6 percent to 132.5 percent; meanwhile, the thermal stability of the mutant is improved to different extents. The method can be applied to the fields of PET enzyme preparation, PET degradation, PET degradation agent preparation or PET degradation product preparation and the like.

The invention provides a recovery device for building waste plastic building materials, and relates to the field of waste recovery devices.The recovery device comprises a feeding mechanism, a crushing mechanism, a separating mechanism and a melting granulation mechanism, and further comprises a crushing system and an electric control system; according to the crushing system, a primary crushing unit is driven by a first variable frequency motor; the secondary crushing unit is arranged at the discharging end of the primary crushing unit and is driven by a second variable frequency motor; the screening unit is arranged below the secondary crushing unit; wherein the electric control system is electrically connected with the first variable-frequency motor and the second variable-frequency motor and used for independently controlling the rotating speeds of the first variable-frequency motor and the second variable-frequency motor so as to drive the primary crushing unit and the secondary crushing unit to do differential relative motion, and the screening unit is used for returning substandard materials to the primary crushing unit to be crushed again. Multi-stage differential crushing and intelligent closed-loop control are adopted, airflow separation and magnetic separation impurity removal are combined, efficient and energy-saving production is achieved through segmented melting and plasticizing, and the treatment efficiency and the purity of a finished product are improved through an automatic system.

The invention discloses a preparation technology for preparing a high-strength PP composite material based on waste plastic regeneration, and belongs to the technical field of regenerated PP composite materials. Cleaning and crushing the separated polypropylene plastic, adding the crushed polypropylene plastic, the maleic anhydride grafted polypropylene, the composite flame-retardant powder, the reinforcing agent, the modified organic silicon resin and the antioxidant 1010 into an internal mixer, carrying out melt blending, and discharging to obtain the high-strength polypropylene composite material. The polypropylene fragments, the composite flame-retardant powder, the reinforcing agent and the modified organic silicon resin are subjected to melt blending, so that the flame retardance, the oxidation resistance, the tensile strength and the cantilever beam notch impact strength of the regenerated polypropylene are further improved.