23937results about "Plastic recycling" patented technology

The present invention relates to the technical field of waste plastic processing. Disclosed is a waste plastic recycling and regeneration device having crushing and cleaning functions. The present invention aims to solve the technical problems of part of powdered impurities in semi-finished plastic particles being easily affected by rolling, vibration and impact of plastic to scatter and flow away, seriously affecting subsequent feeding and processing and polluting the surrounding working environment. The present invention comprises an outer cylinder, an ultrasonic transducer is sleeved at the middle of the outer wall of the outer cylinder, and a top cover is sleeved at the top of the outer cylinder. According to the present invention, a continuously falling water curtain can be formed at the top of the inner cylinder, to continuously intercept and purify part of powdered and scattered impurities; leakage and discharge of first leakage holes and second leakage holes can be further regulated and controlled, and sealing partition, mesh layer screening and centralized discharge are implemented; part of powdered and scattered impurities is continuously intercepted and purified; and an aeration pipe aerates cleaning water in an inner cylinder to promote the stirring and tumbling of semi-finished plastic particles in the cleaning water.

The invention belongs to the technical field of recoverable epoxy resin, and relates to a degradable epoxy resin system material and application thereof, a body, a composite material and a recovery method thereof. The degradable epoxy resin system material comprises a first component and a second component, the first component comprises first epoxy resin and second epoxy resin, and the second component comprises a first curing agent, a second curing agent and an accelerant; the first epoxy resin is a mixture of one or more of glycidyl ether epoxy resin and glycidyl amine epoxy resin and accounts for 15-35% of the first component by mass, the second epoxy resin is selected from one or more of epoxy resin with the structure containing # imgabs0 #, and the second epoxy resin accounts for 60-80% of the first component by mass; the first curing agent is one or a mixture of more of alicyclic amines and accounts for 40%-60% of the second component by mass, the second curing agent is one or a mixture of more of polyether amines and accounts for 40%-60% of the second component by mass, and the accelerant accounts for 0.5%-3% of the second component by mass. The requirement for vacuum infusion of the wind power blade can be met.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprises a first intermediate product and the further organic compound. First particulated material is added to the first intermediate mixture in a volume section V4. A filtering means is pre-coated with the first particulated material. At least one impurity is at least partially removed from the first intermediate mixture using the filtering means. The first particulated material has a median pore diameter in the range of 5 mm to 20 mm.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The feedstock is contacted with a first amount of a first organic compound in a volume section V1 to obtain a first initial mixture. The first amount is in the form of a liquid. The first polyester is transported, and at least a fraction of the first amount of the first organic compound, from the volume section V1 to a volume section V2. The volume section V2 is at least partially filled with the first organic compound. A level of the first organic compound in the volume section V1 is at a height H1 from a floor, and a level of the first organic compound in the volume section V2 is at a height H2 from the floor. The first polyester is contacted with a further organic compound in a volume section V3, to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3, to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product,the further organic compound.H1<H2.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester in the feedstock is in the form of a plurality of fragments. The feedstock is contacted with a first amount of a first organic compound in a volume section V1 to obtain a first initial mixture. The first amount is in the form of a liquid. The first polyester is contacted with a further organic compound in a volume section V3, to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3, to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product andthe further organic compound.30 wt-% or less of the fragments, based on a total weight of the plurality of fragments in the feedstock, have a thickness that is equal to or larger than 1.0 mm.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product and;the further organic compound.First particulated material is added to the first intermediate mixture in a volume section V4. A temperature of the first intermediate mixture in the volume section V4 is in the range of 160° C. to 230° C.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further amount of a first organic compound in a volume section V2. At least one impurity is present in the volume section V2, and the volume section V2 has a first zone and a further zone. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product; andthe further organic compound.A relative ratio of a particle count per area of the at least one impurity in the first zone to a particle count per area of the at least one impurity in the further zone is equal to or greater than 10.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprises a first intermediate product and, the further organic compound. A b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted in a volume section V5. The b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted so that b≤0.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The feedstock is separated into a least a first feedstock amount and a further feedstock amount. The first feedstock amount and the further feedstock amount comprise the first polyester.The first feedstock amount is transported into a first reaction line, and the further feedstock amount is transported into a further reaction line.In a reaction line the first polyester is contacted with a further amount of a first organic compound, a weight average molar mass of the first polyester is reduced, the first polyester is contacted with a further organic compound to obtain a further initial mixture; a weight average molar mass of the first polyester is reduced to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product andthe further organic compound.At least one process parameter varies by at least 10%, between the first reaction line and the further reaction line.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The feedstock is contacted with a first amount of a first organic compound in a volume section V1 to obtain a first initial mixture. The first amount is in the form of a liquid. The first polyester is contacted with a further organic compound to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced to obtain a first intermediate mixture. The first intermediate mixture has a first intermediate product, the further organic compound. A mass ratio of the feedstock to the first organic compound in the volume section V1 is in the range of 0.02 to 3.

The invention discloses a method and a device for modifying and recycling waste plastics. The method comprises the following steps: carrying out multi-band electromagnetic resonance sorting on plastic fragments, distinguishing plastic types through an intelligent recognition algorithm, and synchronously adopting high-frequency eddy current sorting to remove metal impurities, so as to obtain classified plastic fragments; then supercritical fluid treatment is conducted, impurities are removed through a pressure oscillation system, obtained purified plastic fragments, a chain extender and nanofiller are jointly fed into solid-state shearing equipment, a molecular chain repairing reaction is triggered through a temperature control system, then the purified plastic fragments are injected into an intelligent forming system, and technological parameters are dynamically adjusted based on real-time monitoring data; forming a microstructure self-repairing replica through gradient cooling to obtain a regenerated plastic product, and embedding a traceable chip into the regenerated plastic product; impurity separation efficiency is improved through electromagnetic-vortex synergistic separation, microporous pollutants are deeply removed through supercritical fluid treatment, aged molecular chains are effectively repaired through a solid-state shearing chain extension technology, the microstructure of a product is optimized, and the strength and quality of the regenerated plastic product are improved.

The invention discloses a tensile test device for a PE protective film, and relates to the technical field of protective film test.The tensile test device comprises a main machine table, a feeding mechanism is fixedly installed on the upper surface of the left end of the main machine table and used for feeding and discharging, and a detection mechanism is fixedly installed on the upper surface of the right end of the main machine table and used for conducting tensile detection on a sample. A recycling box is fixedly connected to the middle position of the upper surface of the main machine table, and a control box is fixedly installed on the right front portion of the lower surface of the main machine table. Firstly, a left air cylinder is controlled to be started to drive a left clamping plate to downwards extrude a PE protective film into an anti-falling groove I, at the moment, clamping of the left ends of a plurality of samples is effectively completed, and then a right air cylinder is controlled to be started to drive a right clamping plate to downwards extrude the samples into an anti-falling groove II; at the moment, clamping of the right ends of a plurality of samples is effectively completed, and the stability of the clamped samples can be effectively improved through cooperative use of the first anti-disengaging groove and the second anti-disengaging groove.

The invention relates to the technical field of pipe inner wall polishing, in particular to a plastic pipe inner wall polishing device. Comprising a sliding ring slidably arranged on a mounting cylinder, the right side of the sliding ring is connected with an air inflation bag, the right end of the air inflation bag is connected with the mounting cylinder, a fixedly-arranged second electric push rod and a slidably-arranged air pump are further fixedly mounted on the mounting cylinder, and the telescopic end of the second electric push rod is connected with the sliding ring. And a connecting pipe is communicated between an air outlet of the air pump and the inflatable bag. The movable part, the telescopic polishing block and the concentration mechanism are arranged and jointly assist to achieve adaptive adjustment of different pipe diameters, in addition, the inwards-concave inflatable bag is designed, so that the pipeline is adjusted and attached in a matched mode, abrasive dust is efficiently pushed out, the flexibility and adaptability of the equipment are enhanced, and the service life of the equipment is prolonged. And cleaning and polishing are integrated, so that the device can be operated more easily, and the overall using effect and working efficiency of the device are improved.

The invention belongs to the technical field of waste resource recycling, and particularly relates to a waste resource recycling plastic product manufacturing and forming device which comprises a base, an injection mechanism used for plastic plasticizing and moving is arranged at the top of the base, and a first feeding hopper is arranged at the top of the injection mechanism; a mold closing mechanism connected with a discharging port of the injection mechanism is arranged at the top of the base and used for conducting pressing molding on molten plastic, a treatment box is arranged at the position, located on one side of the injection mechanism, of the top of the base, and a smashing mechanism used for smashing waste resources is arranged in the treatment box; the two driving crushing cutters are driven by the first motor to synchronously and relatively rotate, and then are matched with the fixed crushing cutter to crush waste plastics; according to the waste plastic crushing and cleaning device, multiple functions of crushing, screening, cleaning, drying and the like can be ingeniously integrated, the crushing effect and efficiency of waste plastic are improved, and the powder cleaning effect and the powder quality are also improved.

The invention relates to the technical field of plastic recycling, in particular to a waste plastic crushing and sorting device and an automatic metal impurity rejecting method.The waste plastic crushing and sorting device comprises a rack, a primary separation assembly and a two-part assembly, and the primary separation assembly comprises a crushing mechanism arranged on the rack, a flattening mechanism arranged on the crushing mechanism and a conveying and sorting mechanism arranged on a sorting mounting box; the two-part assembly comprises a crushing mechanism arranged on the sorting mounting box and a vibration screening mechanism arranged on the rack and located below the crushing mechanism, through the arrangement of the crushing mechanism and the conveying sorting mechanism, metal is adsorbed to a conveying belt after waste plastic is crushed, and through the arrangement of a power supply component, when a conductive rod slides to an insulating rod, the metal is separated from the insulating rod; the metal automatically falls into the crushing mechanism, plastic remaining on the metal is further crushed, the plastic and the metal are separated more thoroughly, plastic crushing and metal separation are conducted synchronously, the plastic crushing and separating efficiency is improved, and the labor intensity of workers is reduced.

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 present invention relates to the technical field of regenerated plastics, and in particular relates to a flame-retardant regenerated plastic and a preparation method therefor. The regenerated plastic comprises the following specific components: 90-100 parts of regenerated high-density polyethylene, 5-10 parts of high-density polyethylene, 1-2 parts of calcium stearate, 1-2 parts of carbon black, 8-12 parts of maleic-anhydride-grafted polyethylene, 2-3 parts of an antioxidant, and 6-8 parts of a polyurethane elastomer. The regenerated high-density polyethylene is used as a main material, the high-density polyethylene is added thereto, the maleic-anhydride-grafted polyethylene is used as a compatibilizer, and then polyhydroxy polybutadiene, epoxidized hydroxyl-terminated polybutadiene and polypropylene oxide glycol are compounded and react with diphenylmethane diisocyanate to generate a polyurethane elastomer, thereby toughening the regenerated polyethylene; moreover, a flame-retardant effect is achieved by means of the synergy of phosphorus and nitrogen; therefore, a regenerated polyethylene plastic with high tensile strength and good flame-retardant performance is prepared. The regenerated plastic can be widely used in a plurality of fields, and has a relatively high level of practicability.

The invention relates to the technical field of plastic recycling, in particular to a recycling process of waste plastic and ore bottles, and solves the problems that in the existing plastic bottle recycling process, cleaning is insufficient, impurity residues are easily caused, cleaning liquid is inconvenient to fully utilize, and the plastic bottles are directly crushed, so that the crushing quality is poor. Comprising the following steps that S1, waste plastic bottles are recycled and packaged in a manual or mechanical mode and then transported, transferred and stored through a vehicle, when the plastic bottles need to be reused, packages of the plastic bottles are disassembled and classified, and metal pieces doped in the plastic bottles are removed; and S2, after impurity removal, a feeding conveyor is used for conveying and feeding the plastic bottles. According to the plastic bottle recycling device, plastic bottles are fully cleaned and compressed in the recycling process, the purity of recycled plastic particles can be effectively improved, cleaning liquid can be fully recycled conveniently, and the smashing quality of the plastic bottles can be improved conveniently.

The invention relates to the technical field of film processing, and particularly discloses a plastic film processing waste recovery device which comprises a recovery box, a feeding port is formed in the top end of the recovery box, and the recovery box comprises a primary crushing mechanism used for primary crushing and a cleaning mechanism used for preventing winding. In the using process, through mutual cooperation of the primary crushing mechanism and the secondary crushing mechanism, waste materials can be further crushed into smaller shapes, gradual refining treatment on the waste materials can be achieved in a multi-stage crushing mode, the crushing uniformity and fineness are improved, the quality of recycled products is improved, and the recycling efficiency is improved. Through mutual cooperation of the primary crushing mechanism and the cleaning mechanism, waste remaining in notches between the crushing teeth can be scraped away in time, so that cleanliness between the crushing teeth is kept, it is guaranteed that the crushing rollers can continuously and efficiently conduct crushing work, normal operation of equipment is guaranteed, the shutdown maintenance time is shortened, and the production efficiency is improved. And the working efficiency and the reliability of the device are improved.

The invention relates to the technical field of plastic crushing, in particular to a plastic crushing device which comprises a crushing box, a feeding hopper is installed on the upper portion of one side of the crushing box, two crushing shafts are rotatably installed between the two ends of the crushing box, and a crushing roller is installed in the middle of the outer side wall of each crushing shaft. Two supports are installed above one side of the smashing box, vertical plates are installed on the supports, and a dust removal box is arranged between the two vertical plates. According to the plastic cutting device, the hollow shaft is rotated firstly, the hollow shaft drives the cutting blades to rotate, plastic is cut into small pieces, follow-up smashing is facilitated, meanwhile, hot air generated by the air heater enters the hollow shaft through the rotating connector and then is discharged through the air outlet, wet dust attached to the surface of the plastic is dried, moisture in the dust is evaporated, the dust becomes dry, and adhesive force is weakened; and the plastic is dedusted firstly, so that the subsequent cleaning is simpler, the consumption of water resources is reduced, and the cleaning cost and the treatment time are reduced.

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 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.

The invention discloses a detection device for automobile parts after injection molding, and relates to the technical field of part detection. Comprising a mounting frame and a detection mechanism, a chain plate conveying mechanism is mounted on the mounting frame, and a conveying driving motor used for driving the chain plate conveying mechanism to work is arranged on one side of the mounting frame; a carrier assembly used for bearing plate type parts is detachably installed on a chain plate of the chain plate conveying mechanism. The carrier assembly comprises a carrier seat and a carrier assembly, wherein the carrier seat is detachably mounted on a chain plate of the chain plate conveying mechanism; the supporting plate is arranged on the outer wall of the top of the carrying base. By arranging the carrier assembly and the detection mechanism, a to-be-detected plate-type part can be placed on the carrier seat, when the to-be-detected plate-type part moves to a detection position, the lifting control assembly works to drive the pressing disc to downwards press the plate-type part, if the plate-type part deforms, the two ends of the plate-type part tilt upwards, and then the pressure sensor assembly is extruded; and the stress deformation condition of the plate-shaped part is detected by using the pressure sensor assembly.

The invention belongs to the technical field of recycled polyester, and particularly relates to a waste polyester textile recycling method which comprises the following steps: decolorizing colored waste polyester textiles by adopting a decolorizing agent which is more than one of dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate; the depolymerization agent is adopted to depolymerize the decolored polyester textile to obtain the terephthalate, and the depolymerization rate of the decolored polyester textile is 98.0-100%; firstly, terephthalate is converted into DMT, and then DMT, ethylene glycol, a catalyst and a functional additive are subjected to a repolymerization reaction to obtain regenerated PET. According to the method, a process of decoloring and depolymerizing sequentially is adopted, and decoloring and depolymerizing are coordinated, so that the process is simplified, the energy consumption and pollution are reduced, and the economical efficiency and sustainability of waste polyester textile recycling are improved.

The invention belongs to the technical field of enzyme engineering, and discloses an MHETase-EstD9 mutant and an application of the MHETase-EstD9 mutant. The invention provides an MHETase-EstD9 mutant, the amino acid sequence of the MHETase-EstD9 mutant is shown as SEQ ID No.2, and on the basis of the mutant, the amino acid of the MHETase-EstD9 mutant is further mutated to design five MHETase-EstD9 mutants. At 70 DEG C, compared with wild type MHETase-EstD9, the BHET degradation activity of the MHETase-EstD9 mutant provided by the invention is improved by 15% or more, and the highest BHET degradation activity can be improved by 24 times; meanwhile, the thermal stability of the MHETase-EstD9 mutant is also improved to a certain extent, and the Tm value is maximally improved by 18.0 DEG C. The method can be applied to the fields of degradation of PET, MHET or BHET, preparation of degradation agents of PET and degradation products thereof, TPA recovery and the like, and has important environmental benefits, economic benefits and social benefits.

The invention discloses a farmland mulching film recycling machine capable of effectively separating film stubbles, and relates to the technical field of mulching film recycling machines, the farmland mulching film recycling machine comprises a V-shaped scraping plate, the V-shaped scraping plate is used for conducting scraping type cleaning on soil, stubbles and stones attached to a mulching film, one side of the V-shaped scraping plate is rotationally connected with an adjusting mechanism through a rotating bolt, and the adjusting mechanism is used for adjusting the film stubbles. According to the farmland mulching film recycling machine capable of effectively separating the film stubbles, the V-shaped scraping plate is used for removing soil, the stubbles and stones attached to recycled mulching films in a scraping mode, and the film stubbles can be removed through the V-shaped scraping plate; the situation that a large amount of impurities such as soil, stubbles and stones are often carried on the rolled and recycled mulching film, so that a large amount of impurities are mixed among film rolls which are finally rolled into a roller, and the recycling is influenced is prevented; a V-shaped plastic pad is arranged on the outer side of a V-shaped scraping plate to elastically resist a large amount of lifted soil and stones; the outer side face of the V-shaped scraper is prevented from being impacted by soil and stones for a long time to generate friction damage and be gradually damaged to be difficult to use.

The invention discloses a waste plastic pyrolysis oil dechlorination method, which comprises: S1, removing mechanical impurities in waste plastic pyrolysis oil, washing to remove inorganic chloride, carrying out oil-water separation, and drying the obtained oil phase to obtain primary dechlorinated waste plastic pyrolysis oil; s2, mixing the primary dechlorinated waste plastic pyrolysis oil with hydrogen, feeding the mixture into a pre-hydrogenation reactor, and converting alkadiene in the primary dechlorinated waste plastic pyrolysis oil into monoolefine under the action of a pre-hydrogenation catalyst to obtain pre-hydrogenated waste plastic pyrolysis oil; s3, fractionating the pre-hydrogenated waste plastic pyrolysis oil into light distillate oil, medium distillate oil and heavy distillate oil; s4, the light distillate oil reacts with hydrogen under the action of a hydrodechlorination catalyst to remove organic chlorides, and a reaction product is subjected to gas-liquid separation to obtain hydrodechlorinated pyrolysis oil; and S5, contacting the medium distillate oil with an adsorbent to obtain adsorption dechlorinated pyrolysis oil. The method is high in chlorine removal rate and good in product quality.

The invention relates to the technical field of automatic film tearing, in particular to film tearing equipment and a film tearing method.The film tearing equipment comprises a base, a material conveying mechanism and a film tearing device, the base is provided with a rotating disc, the rotating disc is provided with a feeding area, a discharging area and a workpiece processing area, and the workpiece processing area is located between the feeding area and the discharging area; the base is configured to place a workpiece; the material conveying mechanism comprises a feeding mechanism and a discharging mechanism, the feeding mechanism is arranged corresponding to the feeding area, and the discharging mechanism is arranged corresponding to the discharging area; the film tearing device is arranged on the outer edge of the rotary disc and located between the feeding mechanism and the discharging mechanism. The film tearing device is provided with a movable deformation fitting part, and the deformation fitting part is configured to fit and remove the film of the workpiece. According to the technical scheme, the film tearing equipment aims to fit and tear film paper with different curved surfaces and special shapes.

The invention belongs to the technical field of asphalt recovery and separation, and particularly relates to asphalt reclaimed material multi-stage separation equipment and a separation method.The asphalt reclaimed material multi-stage separation equipment comprises a machine body, a feeding port is formed in the upper surface of the machine body, a crushing roller is rotationally arranged in the feeding port, and a first discharging port is formed in one side of the machine body; a first sieve plate is fixedly connected to the position, corresponding to the first discharging opening, in the machine body; a multi-stage screening assembly is arranged in the machine body and comprises a second screening plate, a second discharging opening is formed in the position, corresponding to the second screening plate, of the machine body, a third screening plate is arranged below the second screening plate, and the third screening plate is fixedly connected into the machine body. Large asphalt and stones often fall down together with a lot of small asphalt stones, so that the problem that the small asphalt blocks do not pass through sieve pores is solved.

The invention relates to the technical field of plastic recycling, and discloses a PET bottle body label removing device which comprises a machine body, pretreatment mechanisms for pretreating bottle body labels are arranged on the two sides of the outer wall of the machine body correspondingly, and softening mechanisms for softening the bottle body labels are arranged outside the pretreatment mechanisms. A discharging mechanism for conveying pretreated bottle bodies out is arranged on one side of the outer wall of the machine body, the bottles can be flattened before entering the label removing machine through extrusion of an extrusion plate and exhaust thorns, the flattened bottles can make contact with the area of blades of the label removing machine larger than the area of the flattened bottles which are irregularly shaped after being recycled, and therefore the label removing machine is more convenient to use. And meanwhile, in order to prevent the situation that residues exist at the positions, with mucilage glue, of the sticking positions of the labels when the blades scrape the labels, the brush can rotate while the bottles are flattened, a spray head can spray out liquid for softening the labels, and therefore the blades of the label removing machine can better scrape the labels.