CN114474468A - Granulation process for PCR reclaimed material with improved purity - Google Patents
Granulation process for PCR reclaimed material with improved purity Download PDFInfo
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- CN114474468A CN114474468A CN202210008570.XA CN202210008570A CN114474468A CN 114474468 A CN114474468 A CN 114474468A CN 202210008570 A CN202210008570 A CN 202210008570A CN 114474468 A CN114474468 A CN 114474468A
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- 239000000463 material Substances 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 29
- 238000005469 granulation Methods 0.000 title claims abstract description 23
- 230000003179 granulation Effects 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 239000000155 melt Substances 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 238000005303 weighing Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000007791 dehumidification Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 238000007605 air drying Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 33
- 210000001503 joint Anatomy 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 24
- 230000007306 turnover Effects 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 230000009194 climbing Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 239000006148 magnetic separator Substances 0.000 claims description 4
- 239000002923 metal particle Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 2
- 238000000265 homogenisation Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
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- 230000000704 physical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
- B29B2017/0241—Mechanical separating techniques; devices therefor using density difference in gas, e.g. air flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0268—Separation of metals
- B29B2017/0272—Magnetic separation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention relates to the technical field of granulation. The granulation process of the PCR reclaimed material with improved purity comprises the following steps: firstly, carrying out powder filtration and impurity removal on a flaky reclaimed material by a winnowing machine and carrying out primary metal filtration by a primary metal separator; step two, dehumidifying the flaky reclaimed materials by a dehumidifying dryer, and controlling the humidity of the flaky reclaimed materials to be less than or equal to 0.2 per mill of water content; step three, weighing and metering the flaky reclaimed materials and the color master by a vibration weightlessness scale; step four, sequentially passing through an extruder, a melt filter, air drying and cooling and a granulator; fifthly, performing secondary metal filtration through a vibration feeder and a secondary metal filter; and step six, homogenizing in a homogenizing tank. The invention optimizes the traditional reclaimed material granulation process. The method realizes dust filtration, primary metal filtration, dehumidification and drying, impurity filtration, secondary metal filtration and product homogenization through multiple processes, so that the purity of the PCR material is improved, the product performance is improved, and the stable and reliable product quality is ensured.
Description
Technical Field
The invention relates to the technical field of granulation, in particular to a reclaimed material granulation process.
Background
With the push trend of global Recycling economy, more and more enterprises in the plastic industry begin to recover and develop and utilize PCR (Post Consumer Recycling, abbreviated as PCR) materials vigorously. The plastic products that have been used for consumer use are recycled for a second time or even more by means of recycling, grading, regranulating, reapplication.
However, the existing granulation process for the PCR reclaimed materials usually adopts a mode of directly producing, extruding, cooling and granulating, and the mode is more traditional, and finally produced products have higher impurity content and great limitation on the application field.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a granulation process for improving purity of a PCR reclaimed material, so as to solve at least one technical problem.
In order to achieve the above object, the present invention provides a granulation process of a PCR reclaimed material with improved purity, which is characterized by comprising the following steps:
firstly, carrying out powder filtration and impurity removal on a flaky reclaimed material by a winnowing machine and carrying out primary metal filtration by a primary metal separator;
step two, dehumidifying the flaky reclaimed materials by a dehumidifying dryer, and controlling the humidity of the flaky reclaimed materials to be less than or equal to 0.2 per mill of water content;
step three, weighing and metering the flaky reclaimed materials and the color master by a vibration weightlessness scale;
step four, mixing and extruding the flaky reclaimed materials and the color master by an extruder, and then sequentially passing through a melt filter, air drying and cooling and a granulator;
fifthly, performing secondary metal filtration through a vibration feeder and a secondary metal filter;
and step six, homogenizing in a homogenizing tank.
The invention optimizes the traditional reclaimed material granulation process. The method realizes dust filtration, primary metal filtration, dehumidification and drying, impurity filtration, secondary metal filtration and product homogenization through multiple processes, so that the purity of the PCR material is improved, the product performance is improved, and the stable and reliable product quality is ensured. The metal removal of the raw material is carried out by a primary metal separator, the metal removal of the finished product is carried out by a secondary metal filter, and the metal-containing substances are removed.
The flaky reclaimed materials and the color master are weighed by a vibration weightlessness scale, so that the accurate feeding of the raw materials is supported, and a plurality of components can be fed together.
And (5) configuring a melt filter. And in the process of extruding and granulating the product, the classified impurities at the tail end of the extruder are filtered and removed on line.
A homogenization tank is configured to support the product homogenization process at the finished end.
Further preferably, the sheet-shaped reclaimed material passes through a climbing machine, the highest position of the climbing machine is in butt joint with a vibration feeding machine for guiding, and a feed opening of the vibration feeding machine is communicated with a feed opening of the winnowing machine;
at least three discharge ports with wide upper parts and narrow lower parts are arranged at the bottom of the winnowing machine from left to right;
an air inlet is formed in the side wall of the air separator, and the air inlet is adjacent to the air inlet;
an air suction opening is installed at the top of the winnowing machine and connected with a dust hood through an air suction pipe.
The air current that the fan produced directly gets into the air selection case, and the material makes its even air intake department that falls at the air selection case through the vibration, and is flew with the wind, and the material is discharged at each discharge gate after grading, and the dust that the wind chooseed is discharged through the aspiration channel by the dust excluding hood on air selection case upper portion, effectively gets rid of the impurity in the product.
Further preferably, the primary metal separator comprises a feeding machine and a magnetic machine, a feeding hole of the feeding machine is communicated with a discharging hole of the winnowing machine, the feeding machine comprises a conveying belt which is inclined from left to right and used for feeding materials up and down, and a primary magnetic roller is mounted at the top of the feeding machine;
an L-shaped material guide plate is mounted above the top of the feeding machine, the material guide plate comprises a first material guide part and a second material guide part which are mutually perpendicular, the first material guide part is inclined upwards from left to right, the second material guide part is inclined downwards from left to right, the first material guide part is used for guiding metal particles, a discharge gap is formed between the first material guide part and the conveying belt, and the second material guide part is used for guiding flaky reclaimed materials;
the material guided out from the discharge port of the feeding machine is guided into the over-magnetizing machine by the material guide plate;
the magnetic passing machine comprises a detection channel which is vertically arranged, and an electromagnet and a magnetic inductor which are oppositely arranged are arranged in the detection channel;
the magnetic separator also comprises a blanking channel and a discharging channel, wherein the blanking channel and the discharging channel are in butt joint conduction with the detection channel, the blanking channel is vertically arranged, and the discharging channel is obliquely arranged;
the magnetism passing machine further comprises a switching mechanism for switching the detection channel, the discharging channel and the discharging channel, when the magnetic sensor senses the magnetic article approach detection channel, the detection channel is in butt joint with the discharging channel through the switching mechanism, and when the magnetic sensor does not sense the magnetic article approach detection channel, the detection channel is in butt joint with the discharging channel through the switching mechanism.
Through a primary metal separator for rejection of metalliferous material (including stainless steel, copper, aluminum, etc.). A magnetic field can be formed in the magnetic machine, when metal substances pass through the magnetic machine, the magnetic field can be broken, and the magnetic sensor senses the change of the magnetic field. At the moment, the switching mechanism closes the blanking channel, and the switching mechanism opens the blanking channel to remove the foreign matters.
Further preferably, the magnetic force of the primary magnetic roller is 12000 GS.
Further preferably, the feeding machine comprises a storage hopper, the storage hopper is butted with a discharge port of the winnowing machine, and a vibration feeding device is arranged below the storage hopper;
the vibration feeding device comprises a material guide plate which is obliquely arranged, and a screen is arranged on the material guide plate;
an ash collecting groove is arranged below the material guide plate;
the vibration feeding device also comprises a rack, and four springs are arranged between the rack and the material guide plate;
and a vibration motor is arranged on the ash collecting groove.
The material guide plate is driven by the vibration motor to vibrate conveniently, so that the powder on the material is collected in the ash collection groove while the material is moved.
Further preferably, the outer diameters of two of the four springs located on the left side are smaller than the outer diameters of two springs located on the right side.
The left end of the material guide plate is convenient to vibrate up and down slightly.
Further preferably, the switching mechanism comprises a turnover plate, and the turnover plate is in butt joint conduction with the position, adjacent to the discharging channel, of the discharging channel;
when the turnover plate is used for sealing the blanking channel, the turnover plate is obliquely arranged, and the inner wall of the turnover plate is abutted against the inner wall of the blanking channel;
when the turnover plate is used for sealing the discharge channel, the turnover plate is vertically arranged, and the turnover plate shields the upper opening of the discharge channel.
When being convenient for realize the switching of two passageways, can realize through the returning face plate that the unloading passageway is sealed, can also regard as the stock guide, with the leading-in discharge passage of material.
Preferably, the secondary metal filter comprises an upper conveying belt and a lower conveying belt which are arranged in a vertically staggered manner, a discharge port of the vibration feeder is in butt joint with a feed end of the upper conveying belt, a discharge end of the upper conveying belt is in butt joint with a feed end of the lower conveying belt, and a discharge end of the lower conveying belt is in butt joint with the charging barrel;
the upper conveying belt and the lower conveying belt are sleeved on the periphery of the secondary magnetic roller.
The magnetic material is convenient to be adsorbed by the magnetic roller.
Further preferably, the secondary metal filter further comprises a waste collection cover, wherein the waste collection cover is opposite to the lower conveying belt and the upper conveying belt and is positioned below the upper conveying belt and the lower conveying belt;
the waste collecting cover comprises a cover body positioned below the lower conveying belt and a material guide plate which is obliquely arranged;
the guide plate is positioned below the left end of the upper conveying belt, and the lower end of the guide plate is fixedly connected with the left end of the cover body.
The collection of magnetic waste materials is convenient to realize.
Further preferably, the magnetic force of the secondary magnetic roller is 12000 GS.
Further preferably, the melt filter comprises a shell, and a feed inlet and a discharge outlet are formed in the same side of the shell;
the melt filter also comprises a rotating shaft, a filter screen is fixed on the rotating shaft, and the filter screen divides the inner cavity of the shell into a sewage discharge cavity and a purification cavity which are arranged on the left and the right;
a scraper is fixed on the rotating shaft and positioned on the left side of the filter screen, the scraper is obliquely arranged from left to right and is used for scraping the inner wall of the shell;
the left end of the rotating shaft is connected with a screw, and the shell is located in the peripheral area of the screw and is provided with a cooling unit.
The filtration of impurities in the melt is convenient to realize.
Has the advantages that:
1. according to the quality characteristics of PCR, negative influence factors are eliminated from a series of factors such as material physical properties, appearance, purity and the like at the process end, and the granulated material can reach the leading echelon of the quality level of the PCR field.
2. The stable and reliable quality of the material is ensured by multiple filtering and processing means. And stronger adaptability and high-end property are provided for subsequent application ends.
3. The mode production process is reasonable in layout, does not need large-scale production places, and has certain practical popularization and application.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic diagram of a primary metal separator according to the present invention;
FIG. 3 is a schematic diagram of a secondary metal filter according to the present invention;
FIG. 4 is a schematic view of a homogenizer according to the present invention;
FIG. 5 is a schematic structural view of the present invention;
FIG. 6 is a cross-sectional view of the melt filter of the present invention;
FIG. 7 is a schematic diagram of a vibratory weightless scale of the present invention;
FIG. 8 is an exploded view of the vibratory weightless scale of the present invention;
FIG. 9 is a schematic view of a partial structure of a dehumidification module of the dehumidification dryer of the present invention;
fig. 10 is a partial structural view of a drying chamber of the dehumidifying dryer of the present invention.
Wherein: the device comprises a winnowing machine 1, a primary metal separator 2, a dehumidifying dryer 3, a vibration weightless scale 4, a melt filter 5, a secondary metal filter 6, a homogenizing tank 7, a feeding machine 9, a primary magnetic roller 21, a magnetizing machine 22, a return air filter 31, a cooling machine 32, a drying fan 33, a honeycomb rotating wheel 34, a filter 35, a fan 36, a hot air blower 37, a temperature sensor 381, an upper flow guide cover 382, a vertical pipe 383, a lower flow guide cover 384, a metering cylinder 41, a power source 42, a vibration groove 43, a dustproof cover 44, a sliding groove 45, a limiting baffle 46, a gasket 47, a cover plate 48, an exhaust device 49, a rotating shaft 51, a scraper 52, an upper conveying belt 61 and a lower conveying belt 62.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 10, embodiment 1: the granulation process of the PCR reclaimed material with improved purity comprises the following steps: firstly, carrying out powder filtration and impurity removal on a flaky reclaimed material by a winnowing machine 1 and carrying out primary metal filtration by a primary metal separator 2; step two, dehumidifying the flaky reclaimed materials by a dehumidifying dryer 3, and controlling the humidity of the flaky reclaimed materials to be less than or equal to 0.2 per mill of water content; step three, weighing and metering the flaky reclaimed materials and the color master by a vibration weightlessness scale 4; step four, sequentially passing through an extruder, a melt filter 5, air drying and cooling and a granulator; fifthly, performing secondary metal filtration through the vibration feeder and the secondary metal filter 6; step six, homogenizing in the homogenizing tank 7. The invention optimizes the traditional reclaimed material granulation process. The raw material is demetallized by the primary metal separator 2, and the finished product is demetallized by the secondary metal filter to remove the metal-containing substances. The flaky reclaimed materials and the color master are weighed by a vibration weightlessness scale, so that the accurate feeding of the raw materials is supported, and a plurality of components can be fed together. And (5) configuring a melt filter. And in the process of extruding and granulating the product, the classified impurities at the tail end of the extruder are filtered and removed on line. A homogenization tank is configured to support the product homogenization process at the finished end.
The sheet-shaped reclaimed materials pass through a climbing machine, the highest position of the climbing machine is in butt joint guide with a vibration feeding machine, and a feed opening of the vibration feeding machine is communicated with a feed opening of the winnowing machine 1; at least three discharge ports with wide top and narrow bottom are arranged at the bottom of the winnowing machine 1 from left to right; an air inlet is arranged on the side wall of the air separator 1, and the air inlet is adjacent to the air inlet; an air exhaust opening is arranged at the top of the winnowing machine 1 and is connected with a dust hood through an air suction pipe. The air current that the fan produced directly gets into the air selection case, and the material makes its even air intake department that falls at the air selection case through the vibration, and is flew with the wind, and the material is discharged at each discharge gate after grading, and the dust that the wind chooseed is discharged through the aspiration channel by the dust excluding hood on air selection case upper portion, effectively gets rid of the impurity in the product.
The primary metal separator 2 comprises a feeding machine 9 and a magnetic machine 22, a feeding hole of the feeding machine 9 is communicated with a discharging hole of the winnowing machine 1, the feeding machine comprises a conveying belt which is inclined from left to right and used for feeding materials up and down, and a primary magnetic roller 21 is installed at the top of the feeding machine; a material guide plate is arranged above the top of the feeding machine, and the material guided out from the discharge port of the feeding machine is guided into the magnetizing apparatus 22 by the material guide plate; the magnetic passing machine comprises a detection channel which is vertically arranged, and an electromagnet and a magnetic inductor which are oppositely arranged are arranged in the detection channel; the magnetic separator also comprises a blanking channel and a discharging channel, wherein the blanking channel and the discharging channel are in butt joint conduction with the detection channel, the blanking channel is vertically arranged, and the discharging channel is obliquely arranged; the magnetism passing machine further comprises a switching mechanism used for switching the detection channel to be communicated with the discharging channel and the discharging channel, when the magnetic inductor senses the magnetic article path detection channel, the detection channel is communicated with the discharging channel in a butt joint mode through the switching mechanism, and when the magnetic inductor does not sense the magnetic article path detection channel, the detection channel is communicated with the discharging channel in a butt joint mode through the switching mechanism. The switching mechanism comprises a turnover plate, and the turnover plate is in butt joint conduction with the adjacent positions of the blanking channel and the discharge channel; when the turnover plate is used for sealing the blanking channel, the turnover plate is obliquely arranged, and the inner wall of the turnover plate is abutted against the inner wall of the blanking channel; when the turnover plate is used for sealing the discharge channel, the turnover plate is vertically arranged, and the turnover plate shields the upper opening of the discharge channel. When being convenient for realize the switching of two passageways, can realize through the returning face plate that the unloading passageway is sealed, can also regard as the stock guide, with the leading-in discharge passage of material. Through a primary metal separator 2 for rejection of metalliferous material (including stainless steel, copper, aluminum, etc.). Filtering the metal particles with the particle diameter of more than 0.9 mm. A magnetic field can be formed in the magnetic machine, when metal substances pass through the magnetic machine, the magnetic field can be broken, and the magnetic sensor senses the change of the magnetic field. At the moment, the switching mechanism closes the blanking channel, and the switching mechanism opens the blanking channel to remove the foreign matters. The magnetic force of the primary magnetic roller was 12000 GS.
The dehumidifying dryer comprises a dehumidifying module and a drying module which are connected in sequence; the dehumidification module comprises a honeycomb rotating wheel 34 which is arranged in the treatment cavity in a rotatable mode, a first gas inlet, a second gas inlet and a third gas outlet are formed in the lower end of the treatment cavity, a first gas outlet, a second gas outlet and a third gas inlet are formed in the upper end of the drying cavity, the first gas outlet corresponds to the first gas inlet up and down, the second gas outlet corresponds to the second gas inlet up and down, and the third gas inlet corresponds to the third gas outlet up and down;
the dehumidifying module comprises a return air filter 31, a cooler 32 and a drying fan 33 which are sequentially connected, and an air outlet of the drying fan is communicated with the first gas outlet;
a branch pipeline extends between the return air filter 31 and the cooler 32, and the branch pipeline is communicated with the second gas inlet;
the dehumidification module further comprises a filter 35, a fan 36 and an air heater 37 which are sequentially connected, and an air outlet of the air heater 37 is communicated with the third air inlet;
the drying module comprises a drying cavity for drying materials, and the drying cavity is provided with a discharge hole, a feed hole, a hot air inlet and an air outlet;
the air led out from the first air outlet and the air led out from the second air outlet are converged and communicated with the hot air inlet through an output pipeline.
A transverse pipe arranged transversely and a vertical pipe 383 arranged vertically are arranged on the inner wall of the drying cavity, one end of the transverse pipe is communicated with the hot air inlet, and the other end of the transverse pipe is communicated with the middle section of the vertical pipe 383;
the vertical pipe is sealed from top to bottom, the top of the vertical pipe 383 is connected with an upper flow guide sleeve 382 expanding outwards from top to bottom, and the vertical pipe is positioned below the transverse pipe and is connected with a lower flow guide sleeve 384 expanding outwards from top to bottom;
the area of the transverse pipe below the upper air guide sleeve is provided with air outlets which are distributed in the circumferential direction;
the top of the drying cavity is provided with a feeding hole, and the bottom of the drying cavity is provided with a discharging hole;
the bottom of the drying cavity is provided with a rotation-resistant level indicator;
the side wall of the drying chamber is provided with at least three temperature sensors 381 which are arranged obliquely downwards from outside to inside from top to bottom.
The feeding machine comprises a storage hopper, the storage hopper is butted with a discharge port of the air separator 1, and a vibration feeding device is arranged below the storage hopper; the vibration feeding device comprises a material guide plate which is obliquely arranged, and a screen is arranged on the material guide plate; an ash collecting groove is arranged below the material guide plate; the vibration feeding device also comprises a rack, and four springs are arranged between the rack and the material guide plate; the ash collecting groove is provided with a vibration motor. The material guide plate is driven by the vibration motor to vibrate conveniently, so that the powder on the material is collected in the ash collection groove while the material is moved. The outer diameters of two springs positioned on the left side of the four springs are smaller than the outer diameters of two springs positioned on the right side. The left end of the material guide plate is convenient to vibrate up and down slightly.
The vibration weightlessness scale comprises a cover plate 48, a metering cylinder 41, a chute 45, a vibration groove 43 and a power source 42 which are arranged in sequence from top to bottom. A gasket 47 is installed between the chute 45 and the measuring cylinder 41. The periphery of the sliding groove 45 is sleeved with a dust cover, and the dust cover is provided with a zipper. The upper end of the dust cap 44 is attached to the periphery of the metering drum. The lower end of the dust cover 44 is connected to the outer edge of the feed opening of the vibration groove. The cover plate 48 is provided with a feeding hole and an exhaust device 49, the lower end of the metering cylinder 41 is in butt joint with the upper opening of the chute, the flow guide direction of the chute is arc-shaped downwards, the discharging hole of the chute 45 is provided with a vertically arranged limiting baffle 46, and the size of the opening of the discharging hole of the chute 45 is controlled by the limiting baffle; the discharge hole of the chute 45 is over against the vibration groove 43, and the power source 42 is arranged below the vibration groove 43; the outlet of the vibration groove is the outlet of the vibration weightlessness scale; the vibration weightlessness scale further comprises a weighing support and a weighing platform used for weighing the articles on the weighing support, and the weighing support is detachably connected with the metering cylinder 41.
The secondary metal filter 6 comprises an upper conveying belt 61 and a lower conveying belt 62 which are arranged in a vertically staggered mode, a discharge port of the vibration feeder is in butt joint with a feed end of the upper conveying belt, a discharge end of the upper conveying belt 61 is in butt joint with a feed end of the lower conveying belt 62, and a discharge end of the lower conveying belt is in butt joint with the charging barrel; the upper conveying belt and the lower conveying belt are sleeved on the periphery of the secondary magnetic roller. The magnetic force of the secondary magnetic roller was 12000 GS. The magnetic material is convenient to be adsorbed by the magnetic roller. The secondary metal filter also comprises a waste collecting cover which is over against the lower conveying belt and the upper conveying belt and is positioned below the upper conveying belt 61 and the lower conveying belt 62; the waste collecting cover comprises a cover body positioned below the lower conveying belt and a material guide plate which is obliquely arranged; the guide plate is positioned below the left end of the upper conveying belt, and the lower end of the guide plate is fixedly connected with the left end of the cover body. The collection of magnetic waste materials is convenient to realize. The discharge port of the vacuum suction machine is in butt joint with the buffer tank, and the outlet of the buffer tank is in butt joint with the inlet of the vibration feeder. The secondary filter filters metal particles with a particle size of more than 0.7 mm.
The melt filter comprises a shell, and a feed inlet and a discharge outlet are formed in the same side of the shell; the melt filter also comprises a rotating shaft 51, a cylindrical filter screen is fixed in the shell and is positioned at the periphery of the rotating shaft, the filter screen divides the inner cavity of the shell into an inner cavity and an outer cavity which are arranged inside and outside, the inner cavity is in butt joint communication with the feed inlet, and the outer cavity is in butt joint communication with the discharge outlet; a scraper 52 is arranged on the rotating shaft 51, the scraper 52 is obliquely arranged from left to right, and the scraper is used for scraping the inner wall of the filter screen; the left end of the rotating shaft is connected with a screw rod, and a cooling unit is installed in the area of the shell, which is located on the periphery of the screw rod. The scraper is connected with the outer wall of the rotating shaft through a spring. The aperture of the filter screen is 60 microns. The filtration of impurities of more than 60 microns is realized. The feed inlet is positioned at the right end of the shell.
The device realizes sheet friction, vibration powder removal and pneumatic powder removal through the combination of the climbing machine, the vibration feeding machine and the winnowing machine, realizes the removal of sand (the particle size is 0.25mm-0.35mm) and scraps, and has the removal rate of more than 90 percent.
Through the melt filter, removal of glue, paper, wood chips and dust (impurities above 60 microns) is achieved.
The following table shows comparative parameters for the performance of each process of the present invention compared to a conventional product (e.g., polycarbonate PC) without step one, step two, a vibration loss-in-weight scale, a melt filter, and a secondary metal filter:
the foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. The granulation process of the PCR reclaimed material with improved purity is characterized by comprising the following steps:
firstly, carrying out powder filtration and impurity removal on a flaky reclaimed material by a winnowing machine and carrying out primary metal filtration by a primary metal separator;
step two, dehumidifying the flaky reclaimed materials by a dehumidifying dryer, and controlling the humidity of the flaky reclaimed materials to be less than or equal to 0.2 per mill of water content;
step three, weighing and metering the flaky reclaimed materials and the color master by a vibration weightlessness scale;
step four, mixing and extruding the flaky reclaimed materials and the color master by an extruder in sequence, and then, passing the mixture by a melt filter, air-drying and cooling the mixture and a granulator in sequence;
fifthly, performing secondary metal filtration through a vibration feeder and a secondary metal filter;
and step six, homogenizing in a homogenizing tank.
2. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the highest part of the climbing machine is in butt joint with the vibration feeding machine for guiding, and a feed opening of the vibration feeding machine is communicated with a feed opening of the winnowing machine;
at least three discharge ports with wide upper parts and narrow lower parts are arranged at the bottom of the winnowing machine from left to right;
an air inlet is formed in the side wall of the air separator, and the air inlet is adjacent to the air inlet;
an air suction opening is installed at the top of the winnowing machine and connected with a dust hood through an air suction pipe.
3. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the primary metal separator comprises a feeding machine and a magnetic separator, a feeding hole of the feeding machine is communicated with a discharging hole of the winnowing machine, the feeding machine comprises a conveying belt which is inclined from left to right and used for feeding materials up and down, and a primary magnetic roller is mounted at the top of the feeding machine;
an L-shaped material guide plate is mounted above the top of the feeding machine, the material guide plate comprises a first material guide part and a second material guide part which are mutually perpendicular, the first material guide part is inclined upwards from left to right, the second material guide part is inclined downwards from left to right, the first material guide part is used for guiding metal particles, a discharge gap is formed between the first material guide part and the conveying belt, and the second material guide part is used for guiding flaky reclaimed materials;
the material guided out from the discharge port of the feeding machine is guided into the over-magnetizing machine by the material guide plate;
the magnetic passing machine comprises a detection channel which is vertically arranged, and an electromagnet and a magnetic inductor which are oppositely arranged are arranged in the detection channel;
the magnetic separator also comprises a blanking channel and a discharging channel, wherein the blanking channel and the discharging channel are in butt joint conduction with the detection channel, the blanking channel is vertically arranged, and the discharging channel is obliquely arranged;
the magnetism passing machine further comprises a switching mechanism for switching the detection channel, the discharging channel and the discharging channel, when the magnetic sensor senses the magnetic article approach detection channel, the detection channel is in butt joint with the discharging channel through the switching mechanism, and when the magnetic sensor does not sense the magnetic article approach detection channel, the detection channel is in butt joint with the discharging channel through the switching mechanism.
4. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the dehumidifying dryer comprises a dehumidifying module and a drying module which are sequentially connected;
the dehumidification module comprises a rotatable honeycomb rotating wheel arranged in a treatment cavity, a first gas inlet, a second gas inlet and a third gas outlet are arranged at the lower end of the treatment cavity, a first gas outlet, a second gas outlet and a third gas inlet are arranged at the upper end of the drying cavity, the first gas outlet corresponds to the first gas inlet up and down, the second gas outlet corresponds to the second gas inlet up and down, and the third gas inlet corresponds to the third gas outlet up and down;
the dehumidifying module comprises a return air filter, a cooler and a drying fan which are sequentially connected, and an air outlet of the drying fan is communicated with the first gas outlet;
a branch pipeline extends between the return air filter and the cooler, and the branch pipeline is communicated with the second gas inlet;
the dehumidification module further comprises a filter, a fan and an air heater which are sequentially connected, and an air outlet of the air heater is communicated with the third air inlet;
the drying module comprises a drying cavity for drying materials, and the drying cavity is provided with a discharge hole, a feed hole, a hot air inlet and an air outlet;
the air led out from the first air outlet and the air led out from the second air outlet are converged and communicated with the hot air inlet through an output pipeline;
a transverse pipe and a vertical pipe are arranged on the inner wall of the drying cavity in a transverse mode, one end of the transverse pipe is communicated with the hot air inlet, and the other end of the transverse pipe is communicated with the middle section of the vertical pipe;
the vertical pipe is sealed from top to bottom, the top of the vertical pipe is connected with an upper flow guide cover expanding outwards from top to bottom, and the vertical pipe is positioned below the transverse pipe and is connected with a lower flow guide cover expanding outwards from top to bottom;
the area of the transverse pipe below the upper air guide sleeve is provided with air outlets which are distributed in the circumferential direction;
the top of the drying cavity is provided with a feeding hole, and the bottom of the drying cavity is provided with a discharging hole;
the bottom of the drying cavity is provided with a rotation-resistant level indicator;
and at least three temperature sensors which are obliquely and downwards arranged from outside to inside are arranged on the side wall of the drying cavity from top to bottom.
5. The granulation process of the PCR reclaimed material with improved purity according to claim 3, characterized in that: the feeding machine comprises a storage hopper, the storage hopper is butted with a discharge port of the winnowing machine, and a vibration feeding device is arranged below the storage hopper;
the vibration feeding device comprises a material guide plate which is obliquely arranged, and a screen is arranged on the material guide plate;
an ash collecting groove is arranged below the material guide plate;
the vibration feeding device also comprises a rack, and four springs are arranged between the rack and the material guide plate;
a vibration motor is arranged on the ash collecting groove;
the outer diameters of two springs positioned on the left side of the four springs are smaller than the outer diameters of two springs positioned on the right side.
6. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the vibration weightlessness scale comprises a cover plate, a metering cylinder, a chute, a vibration groove and a power source which are sequentially arranged from top to bottom;
a gasket is arranged between the chute and the metering cylinder;
a dustproof cover is sleeved on the periphery of the sliding groove, a zipper is arranged on the dustproof cover, the upper end of the dustproof cover is connected with the periphery of the metering cylinder, and the lower end of the dustproof cover is connected with the outer edge of the feeding hole of the vibration groove;
the cover plate is provided with a feeding hole and an exhaust device, the lower end of the metering cylinder is in butt joint with the upper opening of the chute, the flow guide direction of the chute is arc-shaped downwards, the discharge hole of the chute is provided with a vertically arranged limiting baffle, and the opening size of the discharge hole of the chute is controlled by the limiting baffle;
the discharge hole of the sliding groove is over against the vibration groove, and the power source is arranged below the vibration groove; the outlet of the vibration groove is the outlet of the vibration weightlessness scale; the vibration weightlessness scale also comprises a weighing support and a weighing platform used for weighing the articles on the weighing support, wherein the weighing support is detachably connected with the metering cylinder.
7. The granulation process of the PCR reclaimed material with improved purity according to claim 3, characterized in that: the switching mechanism comprises a turnover plate, and the turnover plate is in butt joint conduction with the position, adjacent to the discharging channel, of the discharging channel;
when the turnover plate is used for sealing the blanking channel, the turnover plate is obliquely arranged, and the inner wall of the turnover plate is abutted against the inner wall of the blanking channel;
when the turnover plate is used for sealing the discharge channel, the turnover plate is vertically arranged, and the turnover plate shields the upper opening of the discharge channel.
8. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the secondary metal filter comprises an upper conveying belt and a lower conveying belt which are arranged in a vertically staggered mode, a discharge port of the vibration feeding machine is in butt joint with a feed end of the upper conveying belt, a discharge end of the upper conveying belt is in butt joint with a feed end of the lower conveying belt, and a discharge end of the lower conveying belt is in butt joint with the charging barrel;
the upper conveying belt and the lower conveying belt are sleeved on the periphery of the secondary magnetic roller.
9. The granulation process of the PCR reclaimed material with improved purity according to claim 8, characterized in that: the secondary metal filter also comprises a waste collecting cover, and the waste collecting cover is over against the lower conveying belt and the upper conveying belt and is positioned below the upper conveying belt and the lower conveying belt;
the waste collecting cover comprises a cover body positioned below the lower conveying belt and a material guide plate which is obliquely arranged;
the guide plate is positioned below the left end of the upper conveying belt, and the lower end of the guide plate is fixedly connected with the left end of the cover body.
10. The granulation process of the PCR reclaimed material with improved purity according to claim 1, which is characterized in that: the melt filter comprises a shell, and a feeding hole and a discharging hole are formed in the same side of the shell;
the melt filter further comprises a rotating shaft;
a cylindrical filter screen is fixed in the shell and is positioned at the periphery of the rotating shaft, the filter screen divides the inner cavity of the shell into an inner cavity and an outer cavity which are arranged inside and outside, the inner cavity is in butt joint communication with the feed inlet, and the outer cavity is in butt joint communication with the discharge outlet;
a scraper is fixed on the rotating shaft, is obliquely arranged from left to right and is used for scraping the inner wall of the filter screen;
the left end of the rotating shaft is connected with a screw, and the shell is located in the peripheral area of the screw and is provided with a cooling unit.
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| CN202210008570.XA CN114474468A (en) | 2022-01-05 | 2022-01-05 | Granulation process for PCR reclaimed material with improved purity |
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| CN202210008570.XA CN114474468A (en) | 2022-01-05 | 2022-01-05 | Granulation process for PCR reclaimed material with improved purity |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581986A (en) * | 2012-02-27 | 2012-07-18 | 大河宝利材料科技(苏州)有限公司 | Method for recycling post-industrial recycling waste plastic |
| CN204109175U (en) * | 2014-09-24 | 2015-01-21 | 安徽集虹材料科技有限公司 | For the knot screen of extruder production system |
| CN207874628U (en) * | 2018-02-02 | 2018-09-18 | 连云港黄海水产品市场管理有限公司 | A kind of plastic moisture removing drying device |
| CN209979036U (en) * | 2019-07-23 | 2020-01-21 | 秦皇岛力拓科技有限公司 | Weightless scale for powdery material |
| CN111113727A (en) * | 2020-01-23 | 2020-05-08 | 苏州金泉新材料股份有限公司 | Multiple magnetic suction type scrap iron block removing device for waste polyester regenerated material block |
| CN111389875A (en) * | 2020-05-11 | 2020-07-10 | 温州大学激光与光电智能制造研究院 | Waste glass sorting device |
-
2022
- 2022-01-05 CN CN202210008570.XA patent/CN114474468A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581986A (en) * | 2012-02-27 | 2012-07-18 | 大河宝利材料科技(苏州)有限公司 | Method for recycling post-industrial recycling waste plastic |
| CN204109175U (en) * | 2014-09-24 | 2015-01-21 | 安徽集虹材料科技有限公司 | For the knot screen of extruder production system |
| CN207874628U (en) * | 2018-02-02 | 2018-09-18 | 连云港黄海水产品市场管理有限公司 | A kind of plastic moisture removing drying device |
| CN209979036U (en) * | 2019-07-23 | 2020-01-21 | 秦皇岛力拓科技有限公司 | Weightless scale for powdery material |
| CN111113727A (en) * | 2020-01-23 | 2020-05-08 | 苏州金泉新材料股份有限公司 | Multiple magnetic suction type scrap iron block removing device for waste polyester regenerated material block |
| CN111389875A (en) * | 2020-05-11 | 2020-07-10 | 温州大学激光与光电智能制造研究院 | Waste glass sorting device |
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