CN109576825A - A kind of type materials recycling technique free of cleaning - Google Patents

Abstract

The application provides a kind of type materials recycling technique free of cleaning, belongs to the recovery technology field of artificial filament or the like raw material, waste material or solvent in the fabrication process.Polyester waste material is collected, the de- water/gas and devolatilisation of first time are crushed and are completed；Comminuting matter, which is transferred in blanking feed bin, to carry out from compressing blanking, it is then transferred in system for compacting and carries out compression compact, and second of de- water/gas and devolatilisation are completed during compression compact, it is transferred in melting screw rod again and carries out current limliting segmentation melting, and be sucked by vacuum in melting process, obtained melt is sent into homogenizing viscosity-increasing reactor and cooperates vacuum suction, EG recycling after once filtering, after completing homogenizing thickening, melt can come into operation.The application is applied to the regeneration of the polyester waste materials such as waste silk, has the characteristics that free of cleaning, no pollution, zero-emission, product can be applied to the numerous areas such as long filament, short fibre, sheet material.

Description

A kind of type materials recycling technique free of cleaning

Technical field

This application involves a kind of type materials recycling techniques free of cleaning, and it is former in the fabrication process to belong to artificial filament or the like The recovery technology field of material, waste material or solvent.

Background technique

With the fast development of World Petrochemical Industry industry, synthetic fiber industry is also developed accordingly.PET polyester by In its excellent physics, chemical property and be widely used in the fields such as industrial, civilian, and in all multipurposes of polyester, Polyester is used for the fields such as textile fabric, clothes as the leading raw material of textile.So huge polyester family, is producing Waste material, waste silk, cloth rim charge for generating in process etc. have been the numbers that should not be underestimated, raw from polymerization process to terminal ready-made clothes It produces, full industrial chain industrial waste year yield is more than 4,000,000 tons, and " Polyester " product develops into the big synthesis high score of the first in the world Sub- material.

PET polyester is the linear polymeric material that p-phthalic acid PTA and ethylene glycol EG are formed after esterification, polycondensation, Although PET will not directly cause damages to environment, since there are this rigid radicals of phenyl ring in molecule, and with height Chemical inertness is difficult to degrade under field conditions (factors), is also not easy to be decomposed by the microorganisms.Thus take an examination from environmental behaviour and Ecological Effect Consider, PET waste has become global environmental pollution organic matter, forms " the white dirt to constitute a serious threat to ecological environment Dye ".

As the PET polyester of synthesis high molecular material, a large amount of landfill space can be occupied by directly burying, to water quality and soil It damages；A large amount of carbon dioxide and noxious material can be generated during burning, wherein the waste textile containing chlorine exists The carcinogenic substances such as dioxin can be generated when burning.

Textile industry is closely related with people's lives, and world today's textile industry is faced with two large problems, is on the one hand With the development of world economy and science and technology, the application field of textile is gradually expanded, but its service life is shortening, in addition generation The consumption of the rapid growth of boundary's population, textile increases sharply, cause textile raw material occur it is in short supply, price significantly on It raises.More textile fabric resources will be needed, but polyester belongs to petrochemical industry downstream industry.One of raw material of polyester essence is synthesized to benzene two Formic acid (PTA) is in petroleum.Global Oil resource will be increasingly exhausted, and textile fabric resource will be by great restriction.Separately On the one hand, a large amount of waste textile is but mostly taken as landfill, burns, this not only causes the wasting of resources, but also gives environment Bring crisis.Therefore, the recycling and reusing of PET polyester waste material can not only save vast resources, can also mitigate weaving work The pollution that industry generates environment.The reclaiming of polyester waste material should adhere to two basic principles: firstly, not causing two to environment Secondary pollution；Secondly, commercially viable operation, that is, the balance of cost and product quality.

It can be divided into according to the regeneration techniques development course of waste and old polyester fibre: primary recycles, physical method regenerates, Physical-chemical process and chemical method regenerate three phases.

(1) primary to recycle: mainly polyester waste material is spinned after simple shredding processing and be prepared into filling and Covering material, this method is simple, and equipment investment is limited, and access threshold is low.But due to being only the change of waste material macroscopic form, then Raw product low quality.

(2) physical method regeneration techniques: fiber, process master are melted and are spun into after referring to polyester waste material is cleaned, crushing drying It is related to the variation of polyester macromolecule condensed state structure, has that technical process is simple, at low cost, to be easy to industrialization promotion etc. excellent Point.But that there is Recycling Levels is lower for current physical recovering method, degradation is serious, water resources consumption is big and waste silk bulk density is small The problems such as bring inefficiency.

(3) it physical-chemical process regeneration techniques: after being melted by the polyester waste material that will be recycled, carries out liquid phase or solid phase increases It is viscous, it properly increases molecular weight and extracts volatile lower-molecular substance out.This method is aided with chemical method raising point based on physical method Son amount reduces impurity content, and process relates generally to the variation of macromolecular condensed state.This method can be in the production cost increases little feelings Under condition, effectively promotes the quality of recycled product and realize differential regeneration.And it is high for origin components' complexity, impurity content For the regeneration of polyester waste material (impurity that not can be removed containing dyestuff, auxiliary agent, catalyst etc. especially), relevant melt is quenched Adjusting glutinous technology, control of product quality technical aspect, there is also many insufficient.

Summary of the invention

In view of this, the application provides a kind of type materials recycling technique free of cleaning, the complicated, impurity for polyester waste material source Content is high, bulk density is small, and current recycled polyester waste material physical recovering method scheme is there are water consume, high energy consumption and efficiency is low, produces Product purposes low side, the statuses such as chemical recovering method is at high cost, portion of techniques problem is not yet broken through, the technique is not cleaned, drying is Reclaiming can be carried out to the full industrial chain waste material of polyester, and differential functional form recycled polyester can be prepared, product can be used for spinning Regenerated terylene long filament realizes the multiple circular regeneration of recycled polyester product.

Specifically, the application is realized by following scheme:

A kind of type materials recycling technique free of cleaning, after garbage collection to be processed, successively through broken, blanking, compression compact, molten Melt, once filtering, quenched thickening, secondary filter, can Cast Strip pelletizing form slice or be transferred to fused mass directly spinning；The broken process It is mating to be provided with suction system one, dehydration and devolatilisation for the first time are completed while being crushed；Comminuting matter is transferred to blanking feed bin In, deduster is set at the top of blanking feed bin, and hired roughneck and roller is arranged in bottom, and roller forms the material fallen thereon to squeeze and pull Effect, hired roughneck are set to below roller, squeeze roller the material pulled and carry out shredding and crush again, hired roughneck and roller cooperate Complete the compressing blanking certainly to material；Material is transferred to compression compact process through blanking procedure, and compression compact process is in system for compacting Middle completion, system for compacting include suction system two and compacting chamber, and suction system two is located at compacting top of chamber, cooperates compression compact work Sequence completes second of degassing and devolatilisation；Melting process is completed in melting screw rod, is passed through through compression compact treated material Feeding spiro rod be sent into melting screw rod, melting screw rod include screw sleeve and be installed on screw sleeve two sides compression melt zone and Change flash zone, is set with restrictor ring between screw sleeve and compression melt zone end, compression ratio 3-30, melt pressure at restrictor ring In 10MPa or more, melt enters homogenizing flash zone, homogenizing flash distillation in film-form by the slit between restrictor ring and screw sleeve Section is connected with suction system three, guarantees that homogenizing flash zone vacuum degree is 50-5000Pa, and complete third time and aspirate；Melting extrusion Melt through once being filtered, then be set the quenched thickening process of suction system four and complete the 4th time after aspirating, through secondary mistake Filter can be used as the output of finished product melt.Wherein, suction system one uses blower or vacuum machine, realizes degassing, devolatilisation；Suction System two uses blower or vacuum machine, realizes degassing, devolatilisation；Suction system three is sucked by vacuum using vacuum machine；It takes out Desorption system four is sucked by vacuum using vacuum machine.

In above-mentioned polyester waste material regenerative process, be dehydrated by means of the first time in the realization shattering process of suction system one, It deaerates, devolatilisation, suction system two is set in closely knit mechanism, cooperate realization waste material with cutterhead, compression moving knife, compression stationary knife Second-time breakage and compression, and heat air intake and the frictional heat generation cooperation removing all surfaces water of material, most low boilings Point organic impurities and the broken dust generated complete second degassing, devolatilization during compression compact；Screw rod is melted equal Change and complete third time suction under the vacuum action of flash zone, melt film occurs flashing effect in this section of pressure abrupt release, melts Remaining part higher boiling organic impurities occurs to gasify and taken away by vacuum pick-up system rapidly in body；Last time suction is then sent out The raw small molecule that in homogenizing viscosity-increasing reactor, elimination reaction is generated and the uniformity for promoting product viscosity；In quenched thickening work Respectively setting is filtered together before and after sequence, and the design of overall technical architecture removes organic impurities using four degassing devolatilizations, filters twice The mechanical admixture in product is removed, solves the drawbacks of must relying on washed with impurities in traditional mode of production mode, saves a large amount of water moneys Source and serious pollution of the random sewage effluent to environment is avoided, it, can emission reduction sewage about 200,000 with 50,000 tons/year of Production rates Ton/year.This programme single machine production capacity is big, and specific energy consumption is only the 80% of traditional foam material production energy consumption；In waste material process, Effectively be stripped of mechanical admixture and all kinds of organic impurities in raw material, the spinnability of regenrated slice close to primary slice level, Alternative primary polyester slice is widely used in the various fields such as long filament, short fibre, Nonwovens of spunbond, solves traditional bubble Recovery process is expected since product viscosity is unstable, impurity content is high, can be only applied to the defect in the short fine field of low side.

On the basis of above scheme, we study logical hot type crusher, and determine more be preferable to provide it is as follows: The logical hot type crusher includes completing broken processing chamber and push plate, swing arm and crushing cutter in processing chamber, processing Pump orifice is arranged in top of chamber, and heating medium inlet is arranged in bottom, and feed inlet is located at processing chamber top, and treating material is through feed inlet Into processing chamber, independent driving is arranged in swing arm, which drives push plate to move reciprocatingly through swing arm, will enter the object of processing chamber Discharge port is arranged in material push-in crushing cutter, crushing cutter bottom, crushes the material finished and is sent into blanking feed bin through discharge port.More preferably , the heat medium that the heating medium inlet is passed through is the dry air that temperature is 100-150 DEG C；In the cavity wall of the processing chamber Connecting rod is installed, the other end of connecting rod is connect with push plate, is then connect with swing arm in the middle part of connecting rod, and driving drives swing arm to swing or stretch When movement, push plate is driven to swing through connecting rod, connecting rod one end is fixed with processing chamber cavity wall, and the other end is connect with push rod, and and push rod Bascule is constituted together, improves the stability of push plate campaign；The crushing cutter includes cutter hub, broken stationary knife, strainer and breaks Broken moving knife, broken moving knife are mounted on cutter hub outer wall, and strainer packet is set to outside cutter hub, and broken stationary knife has two rows, is respectively arranged at filter The outer edge for netting both ends is located at broken stationary knife above cutter hub, is crushed stationary knife and the broken of fiber is realized in the cooperation of broken moving knife；Institute It states and is additionally provided with baffle in processing chamber, baffle is located at below push plate, and the processing by extending to crushing cutter opposite side below crushing cutter It at cavity wall, avoids push plate that waste silk is brought into material leakage phenomenon caused in push plate when returning, reduces cleaning work, meanwhile, In entire shattering process, material is not had and is taken back by push plate, its working efficiency is improved；Above-mentioned heated type crusher solves biography The small problem of system crusher single machine yield, single machine yield improves 3-4 times, can reach 3 ton/hours, soft especially for fiber etc. Property material characteristics design crushing cutter have the characteristics that antiwind, the present apparatus is pre-processed, and large-scale lumps, useless fiber, give up cloth Wait the full industrial chain of polyester, all form waste materials；Heated type is crushed the confession that motor spindle setting heating medium inlet carries out heated dry air Enter, material is preheated (near such as 120 DEG C), remove moisture and part low boiling point organic impurities, pump orifice is arranged in top, takes out Suction inlet is connected to suction system, is improved devolatilization efficiency and is collected the broken dust generated.

On the basis of above scheme, we have done further research to blanking feed bin, and do and be preferably provided with as follows: described Blanking feed bin includes warehouse, conical bottom and feeder pipe, pan feeding at the top of warehouse, and deduster, dedusting is arranged in the warehouse below pan feeding Device picks out manifold trunk outward；Screw rod and conveyor screw are sent on it is furthermore preferred that setting gradually below the hired roughneck, screw rod is sent on and is located at In conical bottom, and it is arranged with hired roughneck in horizontal cross, conveyor screw is located in feeder pipe.

On the basis of above scheme, we have done further research to system for compacting, and do and be preferably provided with as follows: described Be compacted it is intracavitary be equipped with cutterhead, compression stationary knife and compression moving knife, cutterhead with compacting cavity wall be in on-fixed connect, by independently driving band Its rotation is moved, compression stationary knife, which spirals, to be set on compacting cavity wall, the knife edge section towards the setting of cutterhead side for cutting, pressure Contracting moving knife one end is linkage section, and linkage section is fixed on cutterhead, and the other end is the opposite movable rotary-cut section of cutterhead, rotary-cut section and knife The gap for accommodating simultaneously rotary-cut material is provided between disk, and rotary-cut section and linkage section upper surface are in setting of highly successively decreasing, knife Disk, compression stationary knife and compression moving knife form conducting element, it is ensured that compression compact effect when material is rotated with cutterhead is compacted bottom of chamber portion Setting heating air intake；It is furthermore preferred that the compacting moving knife includes that extruded segment is additionally provided between linkage section and rotary-cut section, pressure Real moving knife is connect by linkage section with cutterhead, and rotary-cut section is connect by extruded segment with linkage section, and extruded segment and rotary-cut section and knife The distance between disk is incremented by；Being compacted stationary knife further includes having fixed section and changeover portion, and fixed section side is fixed on the pressure above cutterhead On real machine structure inner wall, the other side extends to form the knife edge section of thickness-tapered by changeover portion to compacting moving knife direction.Program institute The system for compacting cooperation cutterhead bottom-heated air intake of formation constitutes spiral fashion and preheats the compression compact mechanism of action, passes through high speed The cutterhead and diversion member (such as compacting stationary knife, compacting moving knife) of rotation carry out polyester waste material fed from feed bin etc. secondary broken Broken and compression, bulk density is by 200kg/m³It is promoted to 600kg/m³, powder feeding efficiency is greatly improved；What cutterhead high speed rotation generated Temperature of charge is preheated to 180 DEG C or so by frictional heat, and cutterhead bottom setting heating air intake, top is arranged suction system, mentions The devolatilization power of high system removes all surfaces water and most low boiling point organic impurities, and collects the broken dust generated. It is furthermore preferred that the cutterhead rotational frequency is 10.0-50.0Hz；Heat 80-120 DEG C of air themperature that air intake enters.

On the basis of above scheme, we have done further research to homogenizing viscosity-increasing reactor, and do and preferably set as follows Set: the homogenizing viscosity-increasing reactor includes autoclave body and blender, and autoclave body bottom is provided with reactor inlet and reactor outlet, Reactor inlet and reactor outlet separation autoclave body both ends, and reactor inlet and primary filtered communication, what infeed was once filtered Melt, reactor outlet are connected to secondary filter, and the melt after thickening is exported；It is provided at the top of autoclave body and vacuumizes interface, It vacuumizing interface and is connected to vacuum pick-up system, it is ensured that vacuum degree is 50-150Pa (preferably 100-130Pa) in autoclave body, in this way, Part small molecular weight impurity can constantly be removed with the evaporation of ethylene glycol (EG), and the viscosity of recycled polyester product is promoted, and impurity Content is reduced, and is vacuumized interface and is picked out branch pipe, branch pipe and depolymerizing agent entrance are connected, and depolymerizing agent entrance is linked into primary filtering and one On pipeline between secondary filtering, is converged using the EG of recycling as depolymerizing agent by branch pipe and pure/fresh depolymerizing agent, once filtered Micro alcoholysis can be realized in recycled polyester melt in the duct, improves the molecular weight and molecular weight distribution of polyester fondant；Blender In autoclave body, both ends pass through shaft respectively and are connected with stirring motor, and several groups Dropbox, each net are provided in blender Disk is arranged in the mode of being parallel to each other, and grid, the cross-shaped state of grid of adjacent two panels Dropbox, to improve stirring are distributed in Dropbox Efficiency；The fixation autoclave body that rotatable blender and bottom are provided with reactor inlet cooperates, melt under the dynamic of stirring at Film, surface is constantly updated, then cooperates the vacuum pick-up system for vacuumizing interface, and small molecular weight impurity can be with ethylene glycol (EG) Evaporation constantly removes, and the melt viscosity in autoclave body is promoted, and impurity content is reduced, and multiple groups Dropbox has been arranged in parallel in blender, The cross-shaped state of grid in adjacent two panels Dropbox improves Surface Renewal efficiency when stirring, it can be achieved that recycled polyester melt Back-mixing, improve the uniformity of materials quality.

The primary filtering includes that cavity, plunger, hydraulic cylinder, closing slide valve and heating plate, heating plate are set to outside cavity On wall, plunger at one end is packed into cavity, and the position bar of the other end and hydraulic cylinder connects, melt inlet is arranged on cavity and melt goes out Mouthful, it is connected between melt inlet and melt outlet with melt canal, melt canal penetrates through cavity setting, the melt inlet and molten Strainer group is set between body channel, and slide valve is closed in setting on the cavity of inlet side, is closed on slide valve and is provided with backwash mouth, instead Rinse mouth is connected to form backwash channel with the cavity of plunger, is arranged pressure sensor in strainer group, pressure sensor with it is hydraulic Cylinder and closing slide valve are separately connected, to realize the transmitting of pressure signal.Under normal circumstances, melt enters melt flow from melt inlet Road, after being filtered by strainer group, normal melt filtration and supply work are completed in the melt outlet outflow through the cavity other end Make；With the progress of filtering, the impurity in strainer group is built up, and melt pressure rises with it, when pressure sensor detects When melt pressure reaches setting value, pressure sensor issues the signal, and position bar drives plunger outward mobile, and plunger institute is right Entrance one end of the components such as the strainer group answered and melt flow channel disconnects, and backwashes runner then and corresponding to melt outlet one end Melt flow channel is connected, and the sub-fraction melt in the melt flow channel of melt outlet one end is flow backwards, miscellaneous in strainer group by accumulating in Matter is taken out of, and when the pressure in strainer group is lower than setting value, which starts to move backward and reset under the action of hydraulic cylinder, Continue normal melt filtration and conveying.Primary automatic cleaning strainer process is thereby realized, realizes cleaning strainer Purpose, backwash efficiency is high, and production is avoided to pause, and Increasing Production and Energy Saving saves production cost；Draping frequency is greatly reduced, avoids frequently Draping.

The secondary filter includes lower cover plate, filter core and upper cover plate, and melt inlet is arranged in lower cover plate side wall, and top setting is more A diffluence pass being connected to melt inlet；Filter core is made of filter stick, filter medium and skeleton, is provided on filter stick outer wall multiple small Hole, and middle part is then provided with melt canal, aperture is communicated with melt canal, and melt canal lower end is started from close to filter stick bottom Cartridge top is run through in place, upper end, and filter medium packet is set on filter stick, and skeleton is then set up on filter medium；Filter core is installed on Between cover board and lower cover plate, outer cylinder is set with outside filter core；Melt outlet is provided on upper cover plate, the melt outlet and melt canal It communicates；Melt enters through melt inlet, enters melt canal through skeleton, filter medium and aperture again after diffluence pass, through melt Entire filtering is completed in outlet outflow.

Due to polyester waste material source complexity, containing impurity such as moisture, catalyst, spinning oil, textile auxiliaries, and there is heap The features such as product density is small, easily winds, bridge formation, and domestic Reclaim of PET Scrap 95% uses physical method process route, and polyester is useless It is granulated after material cleaning, drying and generates foam material, enter back into next procedure.In our process route, early period gathers collection Ester waste material is not cleaned, dry, is fed with open cutting mode, the material of collection is first placed in logical hot type crusher In, material is heated during crushing, with dehumidifying, devolatility substance, then through blanking feed bin under compression type The water conservancy diversion compression compact of material, system for compacting, crushing material to suitable length are sent into melting screw rod, complete high pressure in melting screw rod After contracting is than melting and being homogenized flash distillation, is once filtered feeding homogenizing viscosity-increasing reactor and be homogenized and viscosify, after completion is quenched again It can be used as finished product melt through two filterings, finished product melt carries out Cast Strip pelletizing and forms slice, or is sent directly into fused mass directly spinning System carries out spinning, compared with traditional mode of production mode, shortens pretreatment procedure, no great lot of water resources consumption and energy consumption. Compared with international most advanced level, which is doubled, and energy consumption of unit product reduces by 20%.

Detailed description of the invention

Fig. 1 is the overall flow schematic diagram of the application；

Fig. 2 is the structural schematic diagram for leading to hot type crusher in the application；

Fig. 3 is the side schematic view of crushing cutter in Fig. 2；

Fig. 4 is the structural schematic diagram of blanking feed bin in the application；

Fig. 5 is the sectional view of blanking feed bin in Fig. 4；

Fig. 6 is the structural schematic diagram of system for compacting in the application；

Fig. 7 is the structural schematic diagram of cutterhead part in Fig. 6；

Fig. 8 is the compression melting section structure schematic diagram that screw rod is melted in the application；

Fig. 9 is the homogenizing flash zone structural schematic diagram that screw rod is melted in the application；

Figure 10 is the structural schematic diagram once filtered in the application；

Figure 11 is the top view once filtered in the application；

Figure 12 is the structural schematic diagram of secondary filter in the application；

Figure 13 is the structural schematic diagram of filter core in the application；

Figure 14 is the structural schematic diagram for being homogenized viscosity-increasing reactor；

Figure 15 is regenrated slice and common slice shear viscosity vs shear rate relation curve at 280 DEG C；

Figure 16 is regenrated slice and common slice shear viscosity vs shear rate relation curve at 285 DEG C；

Figure 17 is regenrated slice and common slice shear viscosity vs shear rate relation curve at 290 DEG C；

Figure 18 is that recycled polyester is sliced and conventional polyester is sliced non-newtonian index under different shear rate with temperature Variation；

Figure 19 is regenrated slice, common slice and hybrid slicing (the two mass ratio 1:1) shear stress pair at 290 DEG C Numerical value vs shear rate logarithm relation curve；

Figure 20 is that the recycled polyester after crystallizing and drying is sliced DSC curve；

Figure 21 is the TGA figure of recycled polyester slice.

Figure label: 1. logical hot type crushers；11. feed inlet；12. push plate；121. connecting rod；13. swing arm；14. crushing cutter； 141. cutter hub；142. broken stationary knifes；143. strainer；144. broken moving knife；15. baffle；151. open-work；16. heating medium inlet； 17. pump orifice；18. discharge port；2. blanking feed bin；21. warehouse；211. side opening；22. conical bottom；23. feeder pipe；24. top Lid；25. manifold trunk；251. deduster；Between 252. dedustings；26. roller；27. hired roughneck；28. sending on screw rod；29. conveyor screw；3. System for compacting；31. being compacted moving knife；311. linkage section；312. extruded segment；313. rotary-cut sections；32. being compacted stationary knife；321. fixed section； 322. changeover portion；323. knife edge sections；324. stationary knife pedestals；33. cutterhead；34. bottom；35. inclined-plane；36. positioning disk；4. screw rod set Cylinder；41. compressing melt zone；42. being homogenized flash zone；43. restrictor ring；5. primary filtering；51. cavity；511. melt inlets one； 512. melt canal；513. strainer groups；514. melt outlets one；52. plunger；53. hydraulic cylinder；531. position bars；It is slided 54. closing Valve；541. backwash mouths；55. heating plate；6. secondary filter；61. lower cover plate；611. melt inlets two；612. diffluence pass；62. Fin；63. filter core；631. filter stick；632. filter medium；633. skeleton；634. melt canal；64. upper cover plate；641. melts go out Mouth two；7. being homogenized viscosity-increasing reactor；71. blender；711. stirring motor；712. shaft；72. Dropbox；73. autoclave body；74. reaction Device entrance；75. vacuumizing interface；751. branch pipe；76. reactor outlet.

Specific embodiment

A kind of type materials recycling technique free of cleaning of present case, in conjunction with Fig. 1, process be can be described as follows:

After garbage collection to be processed, successively through broken, blanking, compression compact, melting, primary filtering, quenched thickening, secondary Filtering, can Cast Strip pelletizing form slice or be transferred to fused mass directly spinning；Broken process is mating to be provided with suction system one, and broken is same When complete for the first time dehydration and devolatilisation；Comminuting matter is transferred in blanking feed bin, and deduster, bottom are arranged at the top of blanking feed bin Hired roughneck and roller are set, and roller, which forms the material fallen thereon, squeezes drag interaction, and hired roughneck is set to below roller, to roller The material for squeezing dragging carries out shredding and crushes again, and the compressing blanking certainly to material is completed in hired roughneck and roller cooperation；Material warp Blanking procedure is transferred to compression compact process, and compression compact process is completed in system for compacting, and system for compacting includes suction system two With compacting chamber, suction system two is located at compacting top of chamber, and cooperation compression compact process completes second of degassing and devolatilisation；It is molten Melt process to complete in melting screw rod, is sent into melting screw rod through feeding spiro rod through compression compact treated material, melts screw rod Including screw sleeve and it is installed on the compression melt zone of screw sleeve two sides and is homogenized flash zone, screw sleeve and compression melt zone Be set with restrictor ring between end, compression ratio 3-30, at restrictor ring melt pressure in 10MPa or more, melt by restrictor ring with Slit between screw sleeve enters homogenizing flash zone in film-form, and homogenizing flash zone is connected with suction system three, guarantees homogenizing Flash zone vacuum degree is 50-5000Pa, and completes third time and aspirate；The melt of melting extrusion is once filtered, then has been set After the quenched thickening process of suction system four completes the 4th suction, the output of finished product melt can be used as through secondary filter.

It is broken to be crushed and be configured with suction system one using logical hot type in above-mentioned polyester waste material regenerative process, it is broken Complete dehydration, devolatilisation for the first time in the process, suction system two be set in closely knit mechanism 3, with cutterhead 33, compression moving knife 31, It compresses the cooperation of stationary knife 32 and realizes the second-time breakage and compression of waste material, and the frictional heat generation cooperation for heating air intake and material removes All surfaces water, most low boiling point organic impurities and the broken dust generated, complete second degassing, devolatilization；Melting Screw rod is completed third time under the vacuum action of homogenizing flash zone 42 and is aspirated, and melt film occurs in this section of pressure abrupt release Flashing effect, remaining part higher boiling organic impurities occurs to gasify and taken away by vacuum pick-up system rapidly in melt；Finally Primary suction then occurs in homogenizing viscosity-increasing reactor, the small molecule that elimination reaction generates and the uniformity for promoting product viscosity, The design of overall technical architecture removes the mechanical admixture in product using four degassing devolatilization removal organic impurities, double-filtrations, Solves the drawbacks of washed with impurities must be relied in traditional mode of production mode.

Specific to hot broken process is led to, in shattering process, we have adhered to, and " power consumption is small, processing capacity is strong, particle Distribution of lengths is narrow, does not melt in shattering process " principle researched and developed.Therefore, it in leading to hot broken process, uses Logical hot type crusher, which is realized, to be crushed, and in conjunction with Fig. 2 and Fig. 3, structure includes completing broken processing chamber and being located in processing chamber Push plate 12, swing arm 13 and crushing cutter 14, pump orifice 17 is set at the top of processing chamber, and heating medium inlet 16, charging is arranged in bottom Mouth 11 is located at processing chamber top, and treating material enters processing chamber through feed inlet 11, and independent driving is arranged (in figure not in swing arm 13 Show), which drives push plate 12 to move reciprocatingly through swing arm 13, and the material for entering processing chamber is pushed into crushing cutter 14, is crushed Discharge port 18 is arranged in 14 bottom of knife, crushes the material finished and is sent into blanking feed bin 2 through discharge port 18.

On the basis of above scheme, set crushing cutter 14 includes cutter hub 141, broken stationary knife 142, strainer 143 and breaks Broken moving knife 144, broken moving knife 144 are mounted on 141 outer wall of cutter hub, and the packet of strainer 143 is set to outside cutter hub 141, and broken stationary knife 142 has Two rows are respectively arranged at the outer edge at 143 both ends of strainer, and broken stationary knife 142 is made to be located at 141 top of cutter hub, be crushed stationary knife 142 and The broken of fiber is realized in the broken cooperation of moving knife 144.Strainer 413 has sieve pore (being not marked in figure), by using different-diameter Sieve pore can reach the length of control cutting particle；Meanwhile the strainer 143 of this sieve pore structure also avoids particle easy entanglement and exists Problem on crushing cutter.

The present embodiment is applied to the broken of the waste materials such as waste silk, is provided with detector at feed inlet 11, when detecting this When place has waste silk to enter, mechanical arm 13 starts, and push plate 12 is driven to do counter-clockwise swing along swing arm 13, will be useless at feed inlet 11 Between the cutter hub 141 and strainer 143 of silk push-in crushing cutter 14, crushing cutter 14 starts automatically, and cutter hub 141 starts turning, and waste silk is fallen When on cutter hub 141, since cutter hub 141 is in rotary state, and broken stationary knife 142 is stationary state, and fiber is transported in cutter groove Row, under the rubbing action of broken stationary knife 142 and broken moving knife 144, the waste materials such as waste silk are broken and form broken section, as the broken segment length When degree is less than 10cm, it is more suitable to be melted, then leaks out through strainer 143 for these broken section, and lower together through the feeding of discharge port 18 Process；When broken segment length is greater than 10cm, these broken section is still recycled between broken stationary knife 142 and cutter hub 141, until broken section Length, which is less than 10cm, can just be sent into subsequent processing.

Hot wind is passed to by means of heating medium inlet 16 in the bottom of the broken link of logical heat, logical hot type crusher 1, heating is situated between The heat medium that matter entrance 16 is passed through is the heated dry air that temperature is 100-150 DEG C, so that in the steam, finish in polyester waste material Volatile matter realization removes for the first time.Meanwhile the top of logical hot type crusher 1 being cooperated to be provided with pump orifice 17, it is easy to volatile matter Dust collection is reentered recovery system after suction exhaust gas filtering by detachment system.

The open semi-surrounding structure feeding-passage of the logical hot type crusher 1 makes the efficiency of separate unit crusher be doubled More than, when breaker roll revolving speed 60rpm, particle length≤10cm, yield reaches 3-4t/h, and rated power is only 132kw, crushing energy Consumption drops to 16.5kwh/t by 56kwh/t；In process of production, we pass to 120 DEG C of hot-air, can make in polyester waste material Object removing 10% or so that moisture, finish are volatilizable.Meanwhile the structure has expanded the range of raw material, it can be achieved that relatively soft waste silk, Such as DTY waste silk, polyester disused cloth raw material are crushed, and broken material size Control is within 10cm.

Baffle 15 is additionally provided in processing chamber as a preferred embodiment of the above solution, baffle 15 is located at 12 lower section of push plate, and by breaking It is extended to below broken knife 14 at the processing cavity wall of 14 opposite side of crushing cutter, baffle 15 is arc-shaped structure, upper end and feed inlet 11 Contour, lower end is then located on the outer casing inner wall of 12 lower section of push plate, in the baffle 15 the case where not influencing 12 normal feed of push plate Under, it avoids push plate 12 from bringing the waste materials such as civilian silk waste silk in push plate 12 into when returning, has both avoided material leakage phenomenon, reduce fettler Make, meanwhile, in entire shattering process, material is not had and is taken back by push plate 12, its working efficiency is improved.It meanwhile being not shadow Heating is rung, open-work 151 is additionally provided on baffle 15, facilitates passing through for heated dry air.

Polyester waste silks density is small, hydrophobicity is strong, easy to produce static electricity, and waste silk is fluffy, carries large quantity of air secretly, and the group of being easy Around, build bridge, common feed bin by the way of gravity automatic blanking, easily build bridge by particle section, can not unobstructed blanking.In order to improve life Producing line efficiency, it is therefore desirable to intermediate bunker is designed to store the particle being crushed, i.e., oppresses blanking procedure certainly in this programme, In the above process, in conjunction with Fig. 5, complete to material from compressing blanking, which uses the blanking of the structure as shown in 4, Fig. 5 Feed bin 2 carries out that deduster 251 is arranged from the top of compressing blanking, the blanking feed bin 2, and blanking feed bin 2 includes warehouse 21, conical bottom 22 With feeder pipe 23, warehouse 21 is square column structure, and conical bottom 22 is connected to 21 lower part of warehouse, feeder pipe 23 then with conical bottom 22 Connection；Upper opening is set at the top of warehouse 21, top cover 24 is installed in activity at upper opening, is opened top cover 24 and is carried out pan feeding, sets in warehouse 21 Deduster 251, deduster 251 pick out manifold trunk 25 outward.

Wherein, upper opening is respectively formed antetheca, rear wall, left wall and right wall by extending downwardly at the top of warehouse 21, antetheca, rear wall On two dedusters 251 are respectively set, steam, the volatilizable object in dust and clast and waste material are aspirated, passed through It discharges, does not pollute the environment after the processes such as filter, electrostatic oil removing, and effectively reduce PET dust and enter in screw rod, cause product The decline of quality, and antetheca and rear wall respectively to two sides extend and warehouse 21 formed two dedustings between 252, between two dedustings 252 are connected to by manifold trunk 25, and in the present embodiment, what deduster 251 was all made of is column dust settling pocket, between deduster 251, dedusting 252 and manifold trunk 25 constitute dedusting mechanism；Warehouse 21 and 22 junction of conical bottom, which are horizontally disposed with, several rollers 26, roller 26 Multiple groups hired roughneck 27 is arranged in lower section；The position that feeder pipe 23 is connect with conical bottom 22, which is provided with, sends on screw rod 28, sends on 28 water of screw rod It is flat to be set in conical bottom 22, and be arranged with hired roughneck 27 in horizontal cross, conveyor screw 29 is located in feeder pipe 23, sends on screw rod 28 points are two sections, and two sections to send on screw flight contrary, send on that 28 lower section of screw rod is vertically-mounted conveyor screw 29, and are transmitted The starting point of screw rod 29 is located at two sections of underfaces for sending on screw rod；Two sections to send on screw flight contrary, and hired roughneck 27 is opened Waste silk after pine is squeezed toward centre, and two sections of places sent among screw rod 28 are vertically arranged with conveyor screw 29, the conveyor screw 29 Waste silk is squeezed down, is completed from compressing blanking process.

The present embodiment is applied to the storage of broken waste silk, leads to the waste materials such as the broken waste silk of hot broken process and is sent through upper opening After entering, top cover 24 at upper opening, at this point, broken broken section of waste silk is fallen on the roller 26 in warehouse 21, in roller 26 Rolling under, adjacent roller 26 to broken section of fiber squeeze and preliminary regular dispersion after, these are by the fibre that tentatively disperses It ties up broken section to fall into again in hired roughneck 27, in the case where hired roughneck 27 acts on, after broken section of fiber carries out shredding again and smashes, falls and sending on spiral shell In bar 28, the revolving speed for sending on screw rod 28 is about 30r/min, and the rotation for sending on screw rod 28 drives material helical feed, further Fiber is homogenized in advance, after broken section of fiber from after sending on and fallen down on screw rod 28, is directly fallen in conveyor screw 29, It is homogenized again under the rotation of conveyor screw 29, it is as completely uniform without dust when fiber is exported from feeder pipe 23 Formation state, broken section of the fiber of the state can be sent directly into twin-screw extruder melt element carry out melting can form spinnability Good improving uniformity of melt.

For further degassing dehydration, water conservancy diversion compression compact process is additionally provided with from after oppressing blanking procedure, water conservancy diversion compression is close It is completed in tangible system for compacting 3, specifically, system for compacting 3 includes outer cover, cutterhead 33, compacting moving knife 31 and is compacted stationary knife 32, Outer cover is hollow columnar structures, and cutterhead 33 is horizontally installed on the bottom 34 of outer cover, is inclined-plane 35 between bottom 34 and cutterhead 33, Compacting moving knife 31 is mounted on cutterhead 33 in the shape of a spiral by positioning disk 36；It is compacted the linkage section 311 and rotary-cut section 313 of moving knife 31 Between be additionally provided with extruded segment 312, compacting moving knife 31 is connect by linkage section 311 with cutterhead 33, and rotary-cut section 313 passes through extruded segment 312 connect with linkage section 311, and extruded segment 312 and the distance between rotary-cut section 313 and cutterhead 33 are incremented by；It is compacted stationary knife 32 also It include fixed section 321 and changeover portion 322,321 side of fixed section is fixed on 3 inner wall of system for compacting of 33 top of cutterhead, separately Side extends to form the knife edge section 323 of thickness-tapered by changeover portion 322 to compacting 31 direction of moving knife.The program is formed by pressure Real machine structure 3 cooperates 33 bottom-heated air intake (not shown) of cutterhead to constitute the spiral fashion preheating compression compact mechanism of action, Being fed from blanking feed bin 2 by high-speed rotating cutterhead 33 and diversion member (such as compacting stationary knife 32, compacting moving knife 31 etc.) Polyester waste material etc. carries out second-time breakage and compression, and bulk density is by 200kg/m³It is promoted to 600kg/m³, charging effect is greatly improved Rate, the horizontal distance d between compacting stationary knife 32, compacting moving knife 31 are not less than 10mm；It, can also be by above scheme in setting up procedure In compacting stationary knife 32, compacting moving knife 31 does and is preferably provided with as follows: compacting 31 one end of moving knife (i.e. linkage section 311) and the company of cutterhead 33 It connects, the other end (i.e. whole rotary-cut sections 313 and partial extruded segment 312) is not contacted with cutterhead 33；Compacting moving knife 31 passes through company It connects section 311 to connect with positioning disk 36 and cutterhead 33, rotary-cut section 313 is connect by extruded segment 312 with linkage section 311, and extruded segment 312 and the distance between rotary-cut section 313 and cutterhead 33 be incremented by, and make rotary-cut section 313 upper surface be higher than extruded segment 312 upper table Face.

In compacting process, waste material to be processed is imported in outer cover, starting device, waste material will turn with the rotation of cutterhead 33 It is dynamic, in rotary course, longer waste material such as long filament, fragment can under the influence of centrifugal force with the compacting stationary knife 32 for setting of spiraling Contact, knife edge section 323 directly streaks these waste materials, and is chopped off, so that the size of these waste materials is smaller and smaller, meets the requirements Be known as broken section, these broken section of high speed rotation on cutterhead 33, it is prominent in the rotary-cut section 313 on cutterhead 33 under the action of into one While step cutting, broken section with broken section, broken section mutually friction generates heat with extruded segment 312 with cutterhead 33 and broken section, with The raising of temperature, broken section of upper remaining moisture and finish are evaporated；Meanwhile under the effect of interior pressure, broken section on cutterhead 33 It is uniformly distributed, waste silk is progressively compacted, and upper layer charging does not influence the compacting of lower layer's waste silk, therefore feeding can be same with compacting process Shi Jinhang, the waste silk after compacting, which is sent through the screw rod of bottom to extrusion molten screw rod, to be melted, into subsequent treatment process.

In use, compacting stationary knife 31 is preferably arranged using elevating screw shape clockwise, compacting stationary knife 31 and compacting Horizontal distance d between moving knife 32 is not less than 10mm, and waste material can be made to carry out rotation along the direction of compacting moving knife 32 to be pressed Contracting, meanwhile, for the hard solid such as polyester waste material block, it can hit and then be crushed with stationary knife in rotation；Wherein knife edge section 323 For stress is most, most easily worn stage, service life is shorter, and fixed section 321 is used as fixed mechanism, and abrasion is relatively most It is small, therefore in the application, preferably knife edge section 323 and changeover portion 322 are an integral structure, and changeover portion 322 and fixed section 321 It can be an integral structure, can also be split type structure, it, can be directly by knife edge section when knife edge section 323 occurs wearing or when fracture 323 remove with changeover portion 322, and the knife edge section 323 more renewed, replacement is convenient, practical；And moving knife 31 is compacted using winged The structure of wing formula, one end are fixed on cutterhead 33 by positioning disk 36, and the other end is then gradually separated with cutterhead 33, broken in acceleration Section mixing speed while improve its kinetic energy, is also beneficial to the progress of plasticizing.

33 rotational frequency of cutterhead is preferably 10.0-50.0Hz, drives particle high speed rotation, particle and compacting by cutterhead 33 It interacts between stationary knife 31, compacting moving knife 32, realizes the compacting process of particle.Meanwhile 33 bottom of cutterhead setting heating air enters Mouthful, suction system (not shown) is arranged in top, improves the devolatilization power of system, removes all surfaces water and the overwhelming majority is low Boiling point organic impurities, and collect the broken dust generated of compacting；80-120 DEG C of air themperature for heating air intake entrance, and knife Disk 33 drives in waste material high-speed rotation, due to frictional heat generation, along with 33 bottom of cutterhead can pass to thermal medium heat tracing, waste material Temperature controls between 100 DEG C -180 DEG C, and reaching as high as 200 DEG C, (temperature also includes frictional heat generation in addition to thermal medium is contributed Contribution), volatilizable further removing in the moisture and finish carried secretly in waste silk.

The revolving speed of above-mentioned system for compacting 3 can reach 400-500 and turn/min, and bulk density is by 200kg/m³It improves to 600kg/ m³, 30 ton/days of production capacity, feeding efficiency promotes 80%, can be by the volatilizable object removing 10% or so of moisture, finish in waste silk.

It is segmented melting process specific to current limliting, by the change of the extrusion molten realization polyester waste material state of screw rod, and Screw extruding melting process also realizes degassing, devolatilization effect, while reducing degradation as far as possible.Present case uses segmented screw rod knot Structure, material is fed and is conveyed by feeding section, while being gradually compacted, therefore the screw channel width of screw thread constantly changes.

The compression ratio of screw thread is sufficiently large, guarantees that material is sufficiently closely knit, state needed for reaching melting, while improving feeding Efficiency.Under normal conditions the either broken flaky material of particle be easy to deform on surface upon compression and and machine tube inner wall It fits together, therefore is also easier to compress；And powder body material is since sliding property is bigger, in the compression melting time and It can be lagged than particle or flaky material on position.Simultaneously because the voidage of polyester waste material is big, material density is smaller, in object A large amount of air can be remained in material, and Solid Bed has been isolated.The feeding section of screw rod is designed using high compression ratio in this project.

In conjunction with Fig. 8, compresses melt zone 41 and mainly sufficiently melt melt/resin compound that feeding section conveying in upstream comes And preliminary hybrid working is carried out, while setting up pressure.Heat needed for polyester waste material melting is set by the heating of screw rod itself Standby and frictional heat provides.The diameter of screw rod is 165mm, and total slenderness ratio 40, compression ratio 3.5, frictional heat is in entirely melting institute Need the large percentage accounted in energy；Simultaneously because needing to carry out resin preliminary dispersion and distributive mixing, the molten of low-viscosity is crossed Body is detrimental to the progress of both mixed processes, the resin especially to differ greatly in the two kinds or more of melt viscosities of mixing In the case where, excessively high melt temperature will be unfavorable for heat transmitting and heat dissipation inside melt, therefore using lower in this project The temperature of temperature control, compression melt zone 41 substantially remains in 264-282 DEG C, while maintaining the state (compression ratio of high compression ratio Control is in 3-30), the case where avoiding the occurrence of " including not melt waste silk in superheated melt ".

It is homogenized the design (compression ratio is controlled in 1-2) that flash zone 42 uses low compression ratio, compresses melt zone 41 by making The abrupt release when pressure set up enters homogenizing flash zone 42, plays and promotes part volatile substances " flash distillation ", then cooperate Vacuum pick-up system removes.

Meanwhile in order to reduce the degradation in screw extruding melting process, our optimization designs technological parameter passes through reduction Melt extruded temperature and reduction shearing etc. modes realize, feeding section: 24.0Hz；The revolving speed 56rpm of melt zone 41 is compressed, temperature is squeezed Degree: 282 DEG C -275 DEG C -273 DEG C -272 DEG C -264 DEG C -295 DEG C -243 DEG C -245 DEG C -247 DEG C -246 DEG C -230 DEG C.

On the basis of the above, present case devises restrictor ring 43 between compression melt zone 41 and homogenizing flash zone 42, limits The spacing for flowing ring 43 and screw sleeve 4 is minimum (≤5mm), on the one hand, and compression melt zone 41 can be made to set up higher pressure, It is homogenized 42 abrupt release of flash zone, part high boiling substance can flash and leave system.On the other hand, recycled polyester melt is with thin Membranaceous by restrictor ring 43, specific surface area is larger, the Transient transformation of pressure between screw compression melt zone 41 and homogenizing flash zone 42, The substances such as the volatilizable object of moisture, finish, ethylene glycol in recycled polyester melt are detached from from system, then true by vacuum pumping Sky, the small-molecule substance carried secretly in melt are evaporated from bath surface and are extracted from melt system, can remove polyester Most of organic impurities in melt.

In existing primary art polyester polymerizations, filtering usually is set before polymer polymerizing reacts completion or next procedure Device, conventional recycled polyester filter is usually to be filtered using sieve, although this filter type largely gets on In addition to impurity and gel particles, but due to the defect of its own structure, filtering accuracy can not be improved further, for partial size compared with Small impurity and gel particles then cannot achieve filtering and prevent, while can not conveniently realize online replacement, influence to give birth to Produce process continuity；In addition impurity content is high in polyester waste material, the impurity in recycled polyester melt is on the one hand removed as far as possible, On the other hand, to reduce because in filter process elevated pressures due to bring melt viscosity drop.In the filter progress of present case, mistake Filter is used using combination filtering, i.e., primary filtering 5 and secondary filter 6, the primary coarse filtration structure for filtering 5 Figure 10-11, coarse filtration 4 column back-flushing filters, can be switched online, and filtering accuracy is 30-60 μm；Front and back end is provided with pressure sensing in coarse filtration Device realizes automatic recoil filtering when pressure reaches setting value；Secondary filter 6 uses the smart filter structure such as Figure 12,13, Essence filtering uses candle wick formula filter, and strainer uses sintered metal net, and filtering accuracy is that 20 μm, every 30 hours or pressure reach 60 Kilogram when switched online.Content of ashes≤0.15% in recycled polyester slice, agglutination particle content≤6/mg polyester reach To can spinning filament level.

Primary filtering 5, secondary filter 6 are respectively arranged at before and after the quenched thickening process of back-mixing formula, and polyester waste material is passing through spiral shell Degradation can be inevitably generated during bar extrusion molten, in order to improve the viscosity of recycled polyester, can further be removed useless The small molecules such as the finish in silk, homogenize recycled polyester melt quality, enlarged reproduction product purposes, the quenched thickening process of back-mixing formula exists It is carried out in homogenizing viscosity-increasing reactor 7, carries out homogenizing increasing stick after waste silk extrusion molten, in conjunction with Figure 14, be homogenized viscosity-increasing reactor 7 and wrap Autoclave body 73 and blender 71 are included, 73 bottom of autoclave body is provided with reactor inlet 74 and reactor outlet 76, reactor inlet 74 Live apart 73 both ends of autoclave body with reactor outlet 76, and reactor inlet 74 is filtered by pipeline (being not marked in figure) and once and 5 connect It is logical, the also access addition that there is depolymerizing agent entrance (being not marked in figure) to carry out depolymerizing agent on the pipeline, reactor outlet 76 with it is secondary 6 connection of filtering, the melt after homogenizing thickening is exported；It is provided at the top of autoclave body 73 and vacuumizes interface 75, vacuumize interface 75 It is connected to vacuum pick-up system (not showing in figure, the realization such as vacuum machine, blower can be used), it is ensured that vacuum degree is 50- in autoclave body 73 150Pa (preferably 100-130Pa), in this way, part small molecular weight impurity can constantly be removed with the evaporation of ethylene glycol (EG), regeneration The viscosity of polyester product is promoted, and impurity content is reduced, and is vacuumized interface 75 and is picked out branch pipe, branch pipe connects with depolymerizing agent entrance Logical, depolymerizing agent entrance is linked on the pipeline between primary filtering 5 and reactor inlet 74, and the EG in the small molecule of suction is returned It receives and passes through branch pipe 751 and pure/fresh depolymerizing agent converges the depolymerizing agent to be formed and be input in pipeline, recycled polyester melt is in pipeline In micro alcoholysis can be realized, improve the molecular weight and molecular weight distribution of polyester fondant；Blender 71 is located in autoclave body 73, and two End is connect by shaft 712 with stirring motor 711 respectively, and several groups Dropbox 72 is provided in blender 71, and each Dropbox 72 is in phase Mutual parallel mode is arranged, and grid (not showing in figure, the mesh of cell structure can be used), adjacent two panels net is distributed in Dropbox 72 The cross-shaped state of the grid of disk 72, to improve stirring efficiency；Rotatable blender 71 is provided with reactor inlet 74 with bottom Fixation autoclave body 73 cooperate, melt forms a film under stirring dynamic, and surface is constantly updated, then cooperates the vacuum for vacuumizing interface 75 Suction system, small molecular weight impurity can constantly be removed with the evaporation of ethylene glycol (EG), and the melt viscosity in autoclave body 73 is promoted, impurity Content is reduced, and multiple groups Dropbox 72 has been arranged in parallel in blender 71, and the cross-shaped state of grid in adjacent two panels Dropbox 72 mentions Surface Renewal efficiency when high stirring, it can be achieved that recycled polyester melt back-mixing, improve the uniformity of materials quality；Wherein, By parameters such as optimization reaction temperature, vacuum degrees, so that final melt index is reached scope of design, be specifically provided that reaction The Liquid level of device entrance 74 is 11.1%, 280.4 DEG C of temperature；The liquid level of section locating for blender 71 is 70-80%, blender 71 Revolving speed 4.0RPM；Pressure 136.0Pa in autoclave body 73,280-282 DEG C of temperature；Liquid level at reactor outlet 76 is 20-30%, pressure Power 120-130Pa.Melt characteristic viscosity fluctuation range≤0.025dl/g after homogenizing thickening, B value < 10, moisture≤50ppm, Diethylene glycol content≤1.2%.

The melt that above scheme regenerates is detected, quality index ginseng is shown in Table 1.

The quality index summary sheet of the regeneration melt of table 1

We cast the regenrated slice that forging slice is formed to above-mentioned regeneration melt and test, and carry out pair with common slice Than shear viscosity as shown in the figure/shear rate curve figure (280 DEG C, 285 DEG C, 290 DEG C) being obtained, referring specifically to Figure 15 (280 At DEG C), Figure 16 (at 285 DEG C), shown in Figure 17 (at 290 DEG C).From in Figure 15-17 it is found that polyester in the molten state, it is apparent The characteristics of viscosity reduces with the increase of shear rate, shows shear thinning.According to the classification of non-newtonian fluid, having should The polyester fondant of feature is known as pseudoplastic fluid.Shear thinning is due to intending netted tangled structure by shearing force by invertibity Caused by destruction.When shear rate increases, occurred conformation changes polyester macromolecule under the action of shear force, and solution occurs and twines It ties and is orientated along flow direction.With the increase of shear rate, the breakdown speed of tangled structure is with regard to increasing in its formation Speed, therefore apparent viscosity is not constant, but is reduced with the increase of shear rate.

From the point of view of the slope of different temperatures lower curve, 290 DEG C of curve " drop " is maximum, this drop with temperature raising And it is gradually reduced.This phenomenon shows the raising with melt temperature, influence of the variation of shear rate to melt apparent viscosity Declining.Meanwhile with the increase of temperature, the apparent viscosity of recycled polyester is molten with conventional polyester with the variation tendency of shear rate Body reaches unanimity.

Figure 18 is that recycled polyester is sliced and conventional polyester is sliced non-newtonian index under different shear rate with temperature Change curve, the range of shear rate are 200-12000s^-1.As can be seen from Figure 18, melt at low shear rates non- Newton index is greater than the non-newtonian index under high-rate of shear, and value of the index under a certain shearing condition is also non-constant, But increase as the temperature rises.Meanwhile the variation tendency of recycled polyester is consistent with the variation tendency of conventional polyester.

Figure 19 is regenrated slice, common slice and hybrid slicing (the two mass ratio 1:1) shear stress pair at 290 DEG C Numerical value vs shear rate logarithm relation curve.As can be seen from Figure 19, the shear stress of conventional polyester slice and shear speed The relationship of rate is bordering on straight line, though the increase of the non-newtonian index shear rate of regenrated slice, changes greatly；It is final obtained molten Body viscosity is between 0.65-0.80dl/g.

From Figure 20,21 as it can be seen that the fusing point of recycled polyester is 258 DEG C, decomposition temperature when thermal weight loss 95% is 397.4 DEG C, Preferable quality index is reached.

Applicant also summarizes cost, energy consumption, physical index, the purposes of recycling etc., as a result referring to table 2 It is shown.

The cost table of comparisons of the different recovery methods of table 2

Raw material range is wide, high degree of automation, high production efficiency, low energy consumption, whole process is realized with can be used for this project No pollution, zero-emission, recycled polyester stay in grade.

Claims (10)

1. a kind of type materials recycling technique free of cleaning, it is characterised in that: after garbage collection to be processed, successively through broken, blanking, pressure Contract closely knit, melting, primary filtering, quenched thickening, secondary filter, can Cast Strip pelletizing form slice or be transferred to fused mass directly spinning；Institute It states that broken process is mating to be provided with suction system one, dehydration and devolatilisation for the first time is completed while being crushed；Comminuting matter turns Enter in blanking feed bin, deduster is set at the top of blanking feed bin, hired roughneck and roller is arranged in bottom, and roller is to the material shape fallen thereon At drag interaction is squeezed, hired roughneck is set to below roller, is squeezed roller the material pulled and is carried out shredding and crush again, hired roughneck The compressing blanking certainly to material is completed with roller cooperation；Material is transferred to compression compact process, compression compact process through blanking procedure It is completed in system for compacting, system for compacting includes suction system two and compacting chamber, and suction system two is located at compacting top of chamber, cooperation Compression compact process completes second of degassing and devolatilisation；Melting process is completed in melting screw rod, is handled through compression compact Material afterwards is sent into melting screw rod through feeding spiro rod, and melting screw rod includes screw sleeve and the compression for being installed on screw sleeve two sides Melt zone and homogenizing flash zone, are set with restrictor ring, compression ratio 3-30, restrictor ring between screw sleeve and compression melt zone end Locate melt pressure in 10MPa or more, melt enters homogenizing flash distillation in film-form by the slit between restrictor ring and screw sleeve Section, homogenizing flash zone are connected with suction system three, guarantee that homogenizing flash zone vacuum degree is 50-5000Pa, and complete third time and take out It inhales；The melt of melting extrusion is once filtered, then is set the quenched thickening of homogenizing viscosity-increasing reactor completion of suction system four After 4th suction of process, the output of finished product melt can be used as through secondary filter.

2. a kind of type materials recycling technique free of cleaning according to claim 1, it is characterised in that: described broken using logical heat Formula crusher is completed, push plate, swing arm and crushing cutter including processing chamber and in processing chamber, setting suction at the top of processing chamber Mouthful, pump orifice is connect with suction system one, and heating medium inlet is arranged in processing chamber bottom, and feed inlet is located at processing chamber top, to Processing material enters processing chamber through feed inlet, and independent driving is arranged in swing arm, which drives push plate to move reciprocatingly through swing arm, The material for entering processing chamber is pushed into crushing cutter, crushing cutter bottom is arranged discharge port, crushes the material finished and be sent into through discharge port Blanking feed bin.

3. a kind of type materials recycling technique free of cleaning according to claim 2, it is characterised in that: the heating medium inlet The heat medium being passed through is the dry air that temperature is 100-150 DEG C.

4. a kind of type materials recycling technique free of cleaning according to claim 2, it is characterised in that: the crushing cutter includes knife Body, broken stationary knife, strainer and broken moving knife, broken moving knife are mounted on cutter hub outer wall, and strainer packet is set to outside cutter hub, is crushed stationary knife There are two rows, be respectively arranged at the outer edge at strainer both ends, is located at broken stationary knife above cutter hub, is crushed stationary knife and broken moving knife The broken of fiber is realized in cooperation.

5. a kind of type materials recycling technique free of cleaning according to claim 1, it is characterised in that: the blanking feed bin includes Deduster is arranged in the warehouse below pan feeding in warehouse, conical bottom and feeder pipe, pan feeding at the top of warehouse, and deduster picks out remittance outward Collector；Setting sends on screw rod in conical bottom, sends on screw rod and hired roughneck and is arranged in horizontal cross；Conveyor screw is set in feeder pipe.

6. a kind of type materials recycling technique free of cleaning according to claim 1, it is characterised in that: the compacting is intracavitary to be equipped with Cutterhead, compression stationary knife and compression moving knife, cutterhead are connect with compacting cavity wall in on-fixed, drive its rotation, pressure by independent driving Contracting stationary knife, which spirals, to be set on compacting cavity wall, and the knife edge section towards the setting of cutterhead side for cutting compresses moving knife one end For linkage section, linkage section is fixed on cutterhead, and the other end is the opposite movable rotary-cut section of cutterhead, is arranged between rotary-cut section and cutterhead There is the gap for accommodating simultaneously rotary-cut material, and rotary-cut section and linkage section upper surface are in setting of highly successively decreasing, cutterhead, compression stationary knife Conducting element is formed with compression moving knife, it is ensured that compression compact effect when material is rotated with cutterhead；It is empty to be compacted the setting heating of bottom of chamber portion Gas entrance feeds 80-120 DEG C of heating air.

7. a kind of type materials recycling technique free of cleaning according to claim 1, it is characterised in that: the homogenizing thickening reaction Device includes autoclave body and blender, and autoclave body bottom is provided with reactor inlet and reactor outlet, reactor inlet and reactor Outlet separation autoclave body both ends, and reactor inlet and primary filtered communication, reactor outlet are connected to secondary filter；In autoclave body top Portion, which is provided with, vacuumizes interface, vacuumizes interface and connect with suction system four, it is ensured that vacuum degree is 50-150Pa in autoclave body, is taken out true Null interface picks out branch pipe, and branch pipe and depolymerizing agent entrance are connected, and depolymerizing agent entrance is linked between reactor inlet and primary filtering Connecting pipe on；Blender is located in autoclave body, and is connected with stirring motor, and several groups Dropbox is provided in blender, Each Dropbox is arranged in the mode of being parallel to each other, and grid, the cross-shaped state of grid of adjacent two panels Dropbox are distributed in Dropbox.

8. a kind of type materials recycling technique free of cleaning according to claim 1-7, it is characterised in that: described primary Filtering includes that cavity, plunger, hydraulic cylinder, closing slide valve and heating plate, heating plate are set on chamber outer wall, and plunger at one end is packed into The position bar of cavity, the other end and hydraulic cylinder connects, and melt inlet is arranged on cavity and melt outlet, melt inlet go out with melt It is connected between mouthful with melt canal, melt canal penetrates through cavity setting, and strainer is arranged between the melt inlet and melt canal Group, slide valve is closed in setting on the cavity of inlet side, is closed on slide valve and is provided with backwash mouth, and the cavity of mouth and plunger is backwashed Connection forms backwash channel, and pressure sensor is arranged in strainer group, and pressure sensor connects respectively with hydraulic cylinder and closing slide valve It connects, to realize the transmitting of pressure signal.

9. a kind of type materials recycling technique free of cleaning according to claim 1-7, it is characterised in that: described secondary Filtering includes lower cover plate, filter core and upper cover plate, and melt inlet is arranged in lower cover plate side wall, and top setting is multiple to be connected to melt inlet Diffluence pass；Filter core is made of filter stick, filter medium and skeleton, and multiple apertures are provided on filter stick outer wall, and middle part is then arranged There is melt canal, aperture is communicated with melt canal, and melt canal lower end starts from filter stick bottom, and filter core top is run through in upper end Portion, filter medium packet are set on filter stick, and skeleton is then set up on filter medium；Filter core is installed between upper cover plate and lower cover plate, Outer cylinder is set with outside filter core；Melt outlet is provided on upper cover plate, which communicates with melt canal；Melt enters through melt Mouth enters, and enters melt canal through skeleton, filter medium and aperture again after diffluence pass, flows out through melt outlet, completes entire Filtering.

10. a kind of type materials recycling technique free of cleaning according to claim 1-7, it is characterised in that: the pumping Desorption system one uses blower or vacuum machine；Suction system two uses blower or vacuum machine；Suction system three is carried out using vacuum machine Vacuum suction；Suction system four is sucked by vacuum using vacuum machine.