1220 results about "Plastic recycling" patented technology

The invention relates to the technical field of regeneration of waste polyester, in particular to a polyester micro-plastic recycling and impurity removing method and equipment. According to the method, the irradiation technology is adopted for treating the polyester micro-plastic, the polyvinyl chloride is removed by combining electron beam irradiation with the specific gravity method, the radiation dosage and time are accurately controlled, the polyvinyl chloride in the polyester micro-plastic can be effectively removed, the color of the polyester micro-plastic is not affected, and the treated polyester micro-plastic can meet the spinning requirement. The equipment is used for realizing the impurity removal method and comprises irradiation treatment equipment, a separation tank, a cleaning tank, a dehydrator and a drying tower. The equipment is simple in structure and convenient to operate, the radiation dosage and time can be accurately controlled in the impurity removal process, the surface temperature of the polyester micro-plastic is effectively controlled, and production and popularization are easy.

The invention relates to the technical field of recycled plastic injection molding, and discloses an injection mold based on a plastic recycled particle uniform plasticizing structure, the injection mold comprises a molding part, the molding part comprises a fixed mold, and one side of the fixed mold is slidably connected with a movable mold. The injection mold based on the uniform plasticizing structure of the plastic recycled particles can effectively solve the problems that in the prior art, the main purpose of a spiral conveyor is conveying, the recycled plastic particles are conveyed forwards and plasticized step by step under rotation pushing of a screw, but the recycled plastic particles are complex in source and difficult to plasticize. The material, the shape, the contained additives and the like of the recycled plastic particles are greatly different, the recycled plastic particles with different characteristics are difficult to be fully and uniformly mixed when entering a mold only through screw conveying and preliminary plasticizing, the interiors of products are easy to have nonuniform components and performances, and the strength of some parts of the products is insufficient. The invention solves the problems of high probability of breakage when bearing external force, poor overall quality, low production efficiency and low product percent of pass.

The invention provides treatment equipment for preparing cable material particles by recycling waste plastic, and relates to the technical field of waste plastic recycling. A tearing box is mounted at the upper end of the recovery treatment box body, and the upper end of the tearing box is of a flaring structure convenient for waste plastics to enter; a smashing box is fixedly arranged at the butt joint position of the inner cavity of the recycling treatment box and the lower end of the tearing box. The equipment adopts a two-stage crushing structure of a tearing box (including a tearing roller) and a crushing box (including a crushing cutter), and through a stage treatment mode of preliminary tearing and spiral crushing, the energy consumption pressure for directly crushing large plastic blocks is remarkably reduced. The tearing roller pre-crushes the materials, so that the load of the crushing cutter is reduced, the spiral blade group of the crushing cutter synchronously pushes the materials to the middle part in the cutting process, and a cyclic crushing path is formed in combination with a dynamic screening mechanism of the screen, so that the crushing uniformity is ensured, and the energy waste caused by repeated treatment is avoided.

The invention relates to a recycled plastic material purity monitoring method based on artificial intelligence, and the method comprises the steps: collecting surface visual image data and spectral signal data of a recycled plastic material, environment parameter data and corresponding recycled plastic material purity data, and carrying out the data processing; constructing a double-branch deep neural network model, and respectively extracting a surface visual image feature vector and a spectral signal feature vector from the surface visual image data and the spectral signal data and fusing the surface visual image feature vector and the spectral signal feature vector; in combination with the plastic recycled material fusion feature vector, a plastic feature data set is adopted to train and optimize a double-branch deep neural network model; and collecting real-time surface visual image data, real-time spectral signal data and real-time environmental parameter data of the to-be-monitored plastic recycled material, and inputting the data into the plastic recycled material purity monitoring model to obtain a real-time purity value of the plastic recycled material. The accuracy and efficiency of monitoring the purity of the recycled plastic material can be improved, and the problems that manual detection is low in efficiency and large in error are solved.

The invention discloses a method for preparing fuel from waste polyolefin through noble-metal-free low-temperature aromatization, which comprises the following steps: in the atmosphere of synthesis gas, carrying out catalytic cracking on polyolefin serving as a raw material by adopting a binary mixed catalytic system to obtain aromatic hydrocarbon; the binary mixed catalytic system comprises Zr-ZnO and a molecular sieve; the catalytic cracking temperature is less than or equal to 300 DEG C. According to the low-temperature aromatization method disclosed by the invention, methanol is generated in situ through the synthesis gas, and the methanol and olefin generated by polyolefin cracking are subjected to Prins reaction, so that the aromatization reaction can be realized at the pyrolysis temperature far lower than that in the prior art, precious metals are not needed, the additional value and the application range of a plastic recovery product are greatly enhanced, and the method is suitable for industrial production. And the cost of the recovery process is reduced.

The invention discloses regeneration processing equipment for waste plastics, and particularly relates to the technical field of plastic recycling, and the regeneration processing equipment for the waste plastics comprises a main frame, and a crushing system and a cleaning system which are arranged in the main frame; a feeding hole is formed in the top of the main frame; the crushing system comprises a crushing assembly, a screening assembly and a recycling, crushing and conveying assembly, the cleaning system comprises a multi-stage countercurrent cleaning device, and the multi-stage countercurrent cleaning device is arranged below the screening assembly; the multi-stage countercurrent cleaning device comprises a plurality of cleaning tanks which are arranged in the main frame and are designed in parallel, a transfer impeller and a circulating water treatment unit, the feeding port comprises a material guide plate of the crushing assembly, and a discharging guide plate is installed in the main frame; and through the smashing assembly, the screening assembly and the recycling, smashing and conveying assembly, screening and re-smashing of plastic can be achieved, and the cleaning effect is better under the action of the multi-stage countercurrent cleaning device.

The present invention relates to the field of plastic recycling technology, and specifically to a device for recycling and processing excess waste from plastic production, comprising: a cleaning box; a cleaning mechanism for cleaning plastic waste; a pre-treatment mechanism for treating the plastic waste before cleaning; the cleaning mechanism comprising: a rotating drum rotatably installed in the cleaning box, a power source for driving the rotating drum to rotate, a rotating plate fixedly connected to the end of the rotating drum, a stirring plate fixedly installed on the rotating drum, a cleaning member installed on the stirring plate, and a flushing assembly for flushing the plastic waste. In the present invention, through the provision of the cleaning mechanism, the plastic waste can be stirred, flushed, and brushed, thereby achieving multiple cleanings of the plastic waste, greatly improving the cleanliness of the plastic waste, and solving the problem that the existing cleaning methods all have the problem of incomplete cleaning to varying degrees, affecting the reprocessing quality and utilization rate of the plastic waste.

The invention relates to the technical field of plastic recovery, in particular to waste plastic recovery granulation equipment which comprises a screw extruder, a mounting cover is fixedly mounted at the right end of the screw extruder, discharge ports are formed in the positions, corresponding to die orifices of the screw extruder, of the right end of the mounting cover, and a guide unit is mounted in the mounting cover; a pre-cooling unit is mounted at the right end of the screw extruder and is positioned in the mounting cover; the plastic strip pre-cooling forming device is used for recycling waste plastic, extruded plastic strips in a molten state can be uniformly pre-cooled and formed, the problems that the plastic strips crack or plastic particles obtained after particle cutting are irregular in shape and the like are solved, the quality of the produced plastic particles is ensured, and the production efficiency is improved. And meanwhile, extruded plastic strips in a molten state can be guided, drooping deformation of the plastic strips under the action of gravity is prevented, the sizes of the plastic strips in the axial direction are consistent, and then it is guaranteed that the sizes of plastic particles produced subsequently are uniform.

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 belongs to the technical field of information, and particularly relates to a taboo search algorithm-based waste plastic regeneration production process energy-saving method, which comprises the following steps of: firstly, carrying out detailed modeling and energy consumption analysis on a production process, covering links such as raw material pretreatment, melt extrusion and the like, and constructing an energy consumption model; secondly, designing a tabu search algorithm, representing an optimization scheme by a solution vector, and searching an optimal solution by taking the minimum energy consumption as a target function through the steps of initial solution generation, neighborhood search, tabu table operation and the like; and finally, making an optimization scheme according to the optimal solution and implementing, monitoring and evaluating in real time, and adjusting and perfecting according to a result. The scheme aims at improving the energy utilization efficiency and reducing the cost and environmental pollution.

The invention belongs to the technical field of waste plastic recycling, and provides an electrostatic separation method and device for plastic particles, and the electrostatic separation method for the plastic particles comprises the steps that conductive materials are applied to the surfaces of the plastic particles to be separated, so that composite coatings are formed on the surfaces of the plastic particles; bombarding the plastic particles after the composite coating is applied through plasma; the bombarded plastic particles are cleaned through high-frequency ultrasonic waves; and selecting a corresponding ionization mode according to the type of the plastic particles so as to sort the cleaned plastic particles. According to the electrostatic separation method for the plastic particles, the separation efficiency and purity of the plastic particles can be greatly improved.

The utility model relates to the technical field of environment-friendly plastic recovery, in particular to an environment-friendly plastic recovery and regeneration treatment device which comprises a box body, and supporting pads are installed at the four corners of the bottom of the box body. An electric push rod extends to push a rack to move at the bottom of a supporting plate and drive a gear to rotate, and the gear rotates to drive a rotating rod to rotate back and forth to drive a plurality of groups of nozzles to rotate for angle adjustment so as to facilitate flushing; and thus, the cleaning frame is driven to reciprocate between the two L-shaped supporting plates to shake and turn over the plastic falling into the cleaning frame after screening, cleaning is more thorough, and the problem that the recycling efficiency is reduced due to the fact that dust and impurities on the plastic are inconvenient to clean when environment-friendly plastic is recycled traditionally is effectively solved.

The invention relates to the technical field of plastic recovery, and discloses a marine regenerated PET plastic recovery processing system and a processing technology.The marine regenerated PET plastic recovery processing technology comprises the steps that a multi-agent system is constructed through a water surface unmanned ship, an underwater robot and an air unmanned aerial vehicle, collaborative decision making and task allocation are conducted based on a behavior tree framework, and a target object is obtained; a self-organizing map model is adopted to predict the PET plastic distribution density, and a multi-agent system is guided to perform efficient source searching; according to the invention, active source searching, accurate identification and efficient recovery of PET plastics in a marine environment are realized by constructing a sea-land-air cooperative multi-agent system, an underwater PET plastic multi-target detection model and a stained PET plastic feature extraction and classification system, so that the technical problems of low identification accuracy and low recovery efficiency in a traditional recovery technology are solved.

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 belongs to the field of environment-friendly materials, and relates to a waste plastic recycling method which comprises the following steps: designing a novel organic compound modifier, mixing with waste plastic and other auxiliaries, and treating by a specific process. According to the method, the performance, such as bending strength, tensile strength and thermal stability, of the regenerated material is remarkably improved, and an innovative approach is provided for efficient utilization of waste plastics.

The invention belongs to the technical field of plastic recovery, and discloses a plastic part recycling processing device which comprises a processing frame, a conveying mechanism is fixed to the top end of the processing frame, and a vibration mechanism is installed at one end of a crushing mechanism. The device can extrude an extension rod through a second pressing rod, so that the extension rod drives a first connecting rod and a guide plate to rotate, an injection molding part conveyed to the top end of the guide plate rotates downwards, and after the second pressing rod is separated from the extension rod, a torsional spring resets the first connecting rod and the guide plate through the restoring force of the torsional spring; according to the device, the guide plate is arranged, so that the injection molding parts falling on the guide plate are shaken, the injection molding parts which are clamped together and are different in size are separated in advance, the injection molding parts are divided into three types from small to large and fall into the guide box at the bottom to be guided, and therefore the purpose that the device can conveniently separate the injection molding parts which are clamped together and are different in size through double vibration is achieved.

The invention relates to the technical field of waste plastic recovery and cleaning, in particular to a waste plastic recovery and treatment device, and solves the problems that when waste plastics are recovered and cleaned, advanced and post-fed waste plastics are discharged at the same time, so that the waste plastics are not completely cleaned, shutdown treatment is needed when water is changed, and the cleaning cost is high. The waste plastic cleaning device comprises a cleaning mechanism, a circulating mechanism is arranged below the cleaning mechanism, and a scraping mechanism is arranged in the cleaning mechanism. According to the waste plastic cleaning device, the interior of the cleaning tank body can be divided into an inner area and an outer area through an isolation plate, waste plastic can be cleaned in the outer area in the cleaning tank body, then the cleaned waste plastic enters the inner area in the cleaning tank body through a water through groove and is discharged out of the device through a water outlet, and at the moment, the water through groove is blocked through a telescopic baffle; therefore, the waste plastics in the outer area are prevented from entering the inner area, the waste plastics which are not cleaned can be prevented from being discharged, and the cleaning efficiency is improved.

Systems and methods are provided for conversion of polymers (such as plastic waste) to olefins and / or feedstocks that can be further processed for formation of olefins, fuels, and / or other products. The systems and methods can include an optional thermal dehalogenation stage followed by an initial pyrolysis stage where a plastic feedstock is at least partially converted to lower boiling products. Prior to, during, and / or after the pyrolysis stage, one or more contaminant removal stages can be used in order to reduce the content of halides and / or other contaminants in the pyrolysis effluent. This can allow at least a portion of the pyrolysis effluent, such as a gas phase portion and / or a liquid phase portion of the pyrolysis effluent, to have a sufficiently low contaminant content to be used as part of a feed to a conventional petrochemical process.

The invention is suitable for the technical field of plastic recycling, and provides a waste agricultural film recycling device which comprises an equipment frame, a separation box and a crushing box, the separation box is fixedly installed on the equipment frame, the crushing box is fixedly installed at the top of the separation box, the crushing box communicates with the separation box, and the separation box is fixedly installed on the equipment frame. The crushed agricultural film materials fall into the separation box; and two crushing rollers are rotationally mounted in the crushing box, are meshed with each other and are used for crushing materials. According to the waste agricultural film recycling treatment device provided by the scheme, efficient crushing of waste agricultural films is achieved through the crushing rollers, crushed materials and impurities can be effectively separated through the separation net in the separation box, manual screening operation in the follow-up treatment process is reduced, the recycling treatment efficiency is improved, and the labor intensity of workers is reduced. And due to the arrangement of the secondary crushing mechanism, the crushing effect is further optimized, the sizes of the crushed materials are more uniform, subsequent recycling and processing are better facilitated, and the recycling rate of the waste agricultural films is increased.

The invention relates to the technical field of plastic recycling and injection molding, in particular to an optimized regeneration injection molding system based on a plastic part recycling structure, which comprises a rack, and an injection molding machine and a forming mold which are mounted at the top of the rack, and the forming mold comprises a movable mold which is mounted at the top of the rack in a left-right sliding manner; a cutting mechanism used for cutting off runner materials is installed on the movable die, and a recycling mechanism used for recycling the runner materials is installed on the machine frame. The reverse driving assembly drives the inner rotating ring and the outer rotating ring to rotate reversely, the inner rotating ring and the outer rotating ring drive the abutting assembly and the cutting assembly to rotate reversely, the cutting assembly conducts cutting from one side of a runner material, meanwhile, the abutting rod abuts against the runner material from the other side of the runner material, the baffle blocks the right side of the runner material, and it is avoided that in the cutting process, the runner material is cut off, and the runner material is cut off. And when the mold is opened, the runner material is separated, so that the processing efficiency of the plastic part is improved.

The invention discloses a high-precision short-wave infrared hyperspectral imaging soil plastic in-situ detection method and a high-precision short-wave infrared hyperspectral imaging soil plastic in-situ detection device. The device is carried on an unmanned aerial vehicle or an indoor detection platform, large-range short-wave infrared hyperspectral imaging is carried out on soil, data are input into a multi-scale three-dimensional convolution instance segmentation network, space-spectrum dual-mode feature extraction is fused in the network, pixel-level classification of a plastic target under the complex soil background can be achieved, and the detection accuracy is improved. Even if the plastic is partially blocked or fragmented, the plastic can be effectively identified. And performing statistics on types, densities, spatial distribution and material traceability information of plastics in the soil area, and generating a plastic distribution space diagram for environmental plastic recovery path planning. Through the recognition technology, the efficient sorting capacity of the plastic packaging waste is improved, and the defect that in-situ classification recognition precision of mixed, colored or polluted plastic is poor in a traditional recycling method is overcome.

The invention relates to a method for recycling polyethylene plastic through catalytic oxidation cracking, and belongs to the technical field of plastic recycling. The method comprises the following steps: mixing a Co / Al2O3 catalyst, polyethylene plastic and water, and carrying out a catalytic reaction in an oxygen-containing atmosphere at a set temperature, so that the polyethylene plastic is converted into binary acid, thereby obtaining a reaction solution. The low-price Co / Al2O3 catalyst is applied to catalytic oxidation cracking of the polyethylene plastic, the polyethylene plastic is converted into the binary acid, the yield of the binary acid is stabilized at 70% or above and reaches 115% at most, and the Co / Al2O3 catalyst is low in price and low in cost. The low-cost and low-energy-consumption improvement of the yield of the binary acid converted from the polyethylene plastic through catalytic oxidation cracking is fully realized, and a new way is provided for the high-value conversion of the polyethylene plastic.

The invention provides a heating furnace of a waste plastic regeneration extruder, and relates to plastic recovery. The heating furnace of the waste plastic regeneration extruder comprises a screw extruder, the inlet end of the screw extruder is connected with and penetrates through a heating sleeve, and the heating sleeve is divided into a hot air heating unit at the upper end and a hot melting unit at the lower end. According to the heating furnace of the waste plastic regeneration extruder, hot air is used for firstly heating plastic, the plastic is layered and fully heated in the bearing cage, and a pressing rod is pressed to drive an elastic pore plate to swing before the plastic is softened, so that a gap is formed between the elastic pore plate and a ferrule; plastic fragments fall into the material sliding ring from the gap and are discharged to the position above the supporting plate through the through hole, the plastic fragments can be stirred and hot-melted through revolution of the heating rod, the plastic fragments are hot-melted into fluid, the fluid can be extruded into the screw extruder under the action of the pressing plate, and the problem that in the prior art, the melting speed of the plastic fragments is low is solved.

The invention discloses a single-screw extruder anti-blocking machine head for waste plastic recovery, and relates to the technical field of single-screw extruders, the single-screw extruder anti-blocking machine head comprises a rack and a mold, the top end of the rack is fixedly connected with a supporting column, the top end of the supporting column is fixedly connected with a third heater, one end of the third heater is fixedly connected with a cleaning mechanism, and the other end of the third heater is fixedly connected with the mold. One end of the cleaning mechanism is fixedly connected with a correcting mechanism, the cleaning mechanism is arranged, after fiber impurities corrected by the correcting mechanism in the flowing posture pass through the first pipeline, under continuous rotation of the scraping shell, the scraping shell hooks the fiber impurities in the plastic melt and brings the fiber impurities out of the plastic melt, and then the fiber impurities in the plastic melt are cleaned; therefore, the fiber impurities in the plastic melt are cleaned, and the blockage of the machine head caused by the fiber impurities is prevented; and fiber impurities on the surface of the scraping shell can be removed during rotation of the scraping shell, and the situation that the fiber impurities are accumulated on the surface of the scraping shell, and normal cleaning of impurities in plastic melt by the scraping shell is affected is prevented.

The invention relates to the technical field of waste plastic recovery and treatment, and particularly discloses PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field, comprising: a rinsing container having an inner cavity for accommodating PET bottle flakes and a rinsing medium; the power assembly is eccentrically arranged relative to the central axis of the rinsing container and is fixedly mounted at the top end of the rinsing container; the stirring mechanism is coaxially connected to an output shaft of the driving power assembly, and the stirring mechanism is located in the inner cavity of the rinsing container; the power assembly is eccentrically arranged relative to the central axis of the rinsing container, the stirring mechanism is driven to do eccentric rotating motion, differential pushing and shearing effects are generated on a rinsing medium when the stirring mechanism eccentrically rotates, the medium is promoted to form an asymmetric circulating flow field with the radial direction and the axial direction overlapped, and the rinsing effect is improved. The formation of an axis low-pressure area and a stable center vortex is inhibited, a mixing dead angle in the cylinder is eliminated, and the PET bottle chips in each area in the rinsing container can be ensured to be in full convection contact with a rinsing medium.

The invention belongs to the technical field of waste plastic recovery, and discloses a waste plastic film-forming thermal cracking device and method.The waste plastic film-forming thermal cracking device comprises a pre-treatment assembly, a film-forming thermal cracking assembly and a post-treatment assembly which are sequentially communicated; the film-forming cracking assembly comprises a melting module communicated with the pretreatment assembly, and the melting module is communicated with a cracking module used for cracking plastic through a cleaning module; the cracking module comprises a cracking cylinder, a material distribution pipe is rotationally connected into the cracking cylinder, the outer wall of the material distribution pipe communicates with a plurality of spirally arranged flow distribution pipes, and the flow distribution pipes smear molten waste plastics on the inner wall of the cracking cylinder through smearing heads; a spiral scraping and washing plate is arranged on the shunting pipe, the shunting pipe and the scraping and washing plate are arranged in a staggered manner, and the scraping and washing plate is in sliding contact with the inner wall of the cracking cylinder. Modular design is adopted, through cooperative work of all the assemblies, waste plastic treatment can be continuously conducted, the device has the advantages of being high in efficiency, low in energy consumption and long in period operation, equipment faults are reduced, and the device is suitable for recycling of mixed waste plastic.

The invention discloses a plastic waste recycling device and belongs to the field of plastic recycling, the plastic waste recycling device comprises a conveying belt, supporting frames are arranged on the two sides of the conveying belt, a treatment bin is fixedly connected to one sides of the supporting frames, a crushing assembly is arranged at the bottom of the treatment bin, and a magnetic separation assembly is arranged in the middle of the interior of the treatment bin. Metal blocks contained in plastic waste can be attracted by the electromagnet set, plastic can sequentially pass through the electromagnet set to enter the next link, the situation that the metal blocks damage metal parts in follow-up core equipment is avoided, the safety of the follow-up equipment is effectively improved, and the operation and maintenance cost of the equipment is reduced; under the condition that equipment does not stop working, different electromagnet sets can be rapidly switched back and forth to work, metal blocks on the surfaces of the electromagnet sets moved out of the treatment bin can be collected and treated, equipment stop is avoided, the work progress is accelerated, and the workload of workers is reduced.

The invention belongs to the technical field of polyamide plastic recovery, and particularly relates to a method for recovering waste polyamide into a high-added-value product, which comprises the following steps: polyamide and cyclic lactone are subjected to depolymerization and preliminary polymerization reaction in an environment in which argon is continuously introduced, the reaction temperature is 220-280 DEG C, and the reaction time is 2-15 hours; then vacuumizing is carried out, micromolecule by-products generated in the reaction are discharged out of a reaction system, the reaction temperature is 220-280 DEG C, and the reaction time is 2-10 h. According to the method, polyamide and lactone are subjected to ring-opening copolymerization based on a one-step one-pot method to be recycled into a high-added-value product, the step of depolymerizing into a monomer or an oligomer in traditional chemical recycling is directly omitted, and the step of purifying the monomer is not needed; the thermal decomposition temperature and the mechanical property of the final product are equivalent to those of the purchased pure polyamide 66, and the tensile strength and the elongation at break of part of products are higher than those of the polyamide 66.

The invention discloses a crushing device for waste plastic recycling, and relates to the technical field of plastic recycling, the crushing device comprises a shell and a supporting frame fixedly mounted at the bottom of the outer surface of the shell, a feeding hopper is fixedly mounted at the top of the shell, and a fixed cutter mechanism is mounted on the inner wall of the shell; a fixed cutter mechanism is arranged on the inner side face of the shell, a movable cutter mechanism is arranged on the inner side face of the fixed cutter mechanism and fixedly installed on the outer surface of the transmission shaft, a liquid separating and guiding mechanism is installed on the inner wall of the shell, and a vibrating piece is arranged on the lower surface of the liquid separating and guiding mechanism and fixedly installed on the outer surface of the transmission shaft. According to the crushing device for recycling the waste plastics, the movable cutter mechanism and the fixed cutter mechanism are matched to crush the waste plastics of different specifications, the plastics are cleaned through the liquid outlet cabin, the liquid storage part and the cleaning part, stains and impurities on the surfaces of the waste plastics are removed, and the cleanliness of the crushed plastics is improved.

The invention discloses a pretreatment device and method for plastic recycling, and relates to the technical field of plastic recycling, the pretreatment device comprises an L-shaped frame, a bottle cap locking piece is mounted on one side of a threaded sleeve block, a bottle body rotating piece is arranged at the top of a movable frame, and a dumping unit is arranged at the bottom of the L-shaped frame. By arranging a bottle cap locking piece and a bottle body rotating piece, a second transmission straight gear is meshed with a second rack through movement of a moving frame, so that a first T-shaped clamping plate moves towards the circle center of a placing plate, bottle caps can be clamped and limited through the first T-shaped clamping plate, meanwhile, a side plate moves upwards, and the bottle caps can be clamped and limited through the side plate. A second T-shaped clamping plate fits and supports a bottle body of a plastic bottle, when a first transmission straight gear is meshed with a first rack, the second T-shaped clamping plate can enable the bottle body to rotate, so that a bottle cap is separated from the bottle body, a solution in the plastic bottle can be poured out, and the influence of the solution on subsequent plastic recovery is prevented.