CN114211719A - Device and method for melt depolymerization and tackifying of recycled polyester bottle flakes - Google Patents
Device and method for melt depolymerization and tackifying of recycled polyester bottle flakes Download PDFInfo
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- CN114211719A CN114211719A CN202111506973.9A CN202111506973A CN114211719A CN 114211719 A CN114211719 A CN 114211719A CN 202111506973 A CN202111506973 A CN 202111506973A CN 114211719 A CN114211719 A CN 114211719A
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- China
- Prior art keywords
- polyester bottle
- recycled polyester
- main shaft
- pipeline
- reation kettle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/46—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention relates to a device and a method for melt depolymerization and tackifying of recycled polyester bottle flakes, belonging to the field of melt depolymerization and tackifying of recycled polyester bottle flakes. The device comprises a mixing bin, a screw mechanism, a speed reducer, a feeding section, a discharging section, a reaction kettle, a main shaft, a stirrer motor, a pull-tab type stirring structure and a vacuumizing mechanism, wherein the screw mechanism is arranged in the mixing bin and connected with the speed reducer, the feeding section is arranged at the upper end of the mixing bin, the reaction kettle is connected with the mixing bin, the main shaft is arranged in the reaction kettle and connected with the stirrer motor, the pull-tab type stirring structure is arranged on the main shaft, the vacuumizing mechanism is arranged at the upper end of the reaction kettle, and the discharging section is arranged at the lower end of the reaction kettle. The invention has simple and reasonable structural design, safety, reliability, convenient operation and good depolymerization and tackifying effects, and meets the use requirements.
Description
Technical Field
The invention relates to a device and a method, in particular to a device and a method for melt depolymerization and tackifying of regenerated polyester bottle flakes, belonging to the field of melt depolymerization and tackifying of regenerated polyester bottle flakes.
Background
The existing recycled polyester bottle flakes are melted, so that impurities in the polyester cannot be effectively removed, the purity of the recycled polyester cannot be further improved, and the existing requirements for depolymerization and tackifying cannot be met.
The invention discloses an invention patent named as a production method of a cyclic regeneration polyester chip in Chinese patent with publication number CN113087885A, namely, the publication number is 2021, 07/09. The patent includes the following steps: s1, alcoholysis: sending the regenerated bottle flakes to an alcoholysis kettle by air, adding ethylene glycol and zinc nicotinate coordination polymer into the alcoholysis kettle, and heating for alcoholysis; s2, filtering: transferring alcoholysis liquid in the alcoholysis kettle to a filter for filtering; s3, polymerization: adding purified terephthalic acid, ethylene glycol, isophthalic acid and an auxiliary agent into the filtered alcoholysis solution for polymerization, carrying out polymerization reaction for 2-3 h, and controlling the polymerization time to obtain polyesters with different viscosities; and S4, cutting into granules. The invention has the beneficial effects that: the method has the advantages that the zinc nicotinate coordination polymer is used as a PET alcoholysis catalyst, is insoluble in ethylene glycol, is not easily decomposed at the temperature of 240-250 ℃, can be recycled in a filtering mode, is small in catalyst consumption, is green and environment-friendly, but is not suitable for melt depolymerization and tackifying of regenerated polyester bottle chips, and cannot meet the existing requirements.
Therefore, the device and the method for melt depolymerization and tackifying of the recycled polyester bottle flakes are particularly necessary, and have the advantages of simple and reasonable structural design, safety, reliability, convenient operation and good depolymerization and tackifying effects.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the device and the method for melt depolymerization and tackifying of the recycled polyester bottle flakes, which have the advantages of simple and reasonable structural design, safety, reliability, convenient operation, good depolymerization and tackifying effects and can meet the use requirements.
The technical scheme adopted by the invention for solving the problems is as follows: this tackifying device of reclaimed polyester bottle piece melt depolymerization, including blending bunker, screw mechanism, reduction gear, feeding section and play material section, set up screw mechanism in the blending bunker, this screw mechanism links to each other with the reduction gear, and the feeding section sets up the upper end at the blending bunker, its characterized in that: still include reation kettle, main shaft, agitator motor, pulling-on piece formula stirring structure and evacuation mechanism, reation kettle links to each other with the blending bunker, is provided with the main shaft in the reation kettle, and this main shaft links to each other with the agitator motor, is provided with pulling-on piece formula stirring structure on the main shaft, and reation kettle's upper end is provided with evacuation mechanism, and the play material section sets up the lower extreme at reation kettle.
Preferably, the invention also comprises an online viscometer, and the lower part of the discharging section is provided with the online viscometer.
Preferably, the mixing device further comprises a pipeline, the mixing bin and the reaction kettle and the vacuumizing are connected through the pipeline, and the pipeline is made of stainless steel pipelines.
Preferably, the invention also comprises a biphenyl heating layer, wherein the biphenyl heating layer is arranged on the periphery of the reaction kettle and outside the pipeline.
Preferably, the vacuum-pumping mechanism of the invention adopts a multi-stage vacuum-pumping structure.
Preferably, the multistage vacuumizing structure comprises a first-stage vacuum unit, a second-stage vacuum unit and a third-stage vacuum unit which are connected in sequence.
The invention also provides a method for melt depolymerization and tackifying of the recycled polyester bottle flakes, which is characterized by comprising the following steps: the method comprises the following specific steps:
s1: adding main materials and auxiliary materials into the feeding section;
s2: a screw mechanism in the mixing bin is driven by a speed reducer to act, and the main material and the auxiliary material are mixed;
s3: then enters the reaction kettle through a pipeline, and a stirrer motor works to drive the main shaft to act;
s4: then the main shaft rotates to drive the pull-tab type stirring structure to work; driving the oligomer in the mixture to pass through a pipeline to a vacuumizing mechanism;
s5: the viscosity is improved through multi-stage vacuum pumping of the vacuum pumping mechanism;
s6: discharging at a discharging section;
s7: the recycled polyester bottle chips with the viscosity of 0.9-1.0d1/g are obtained by an online viscometer.
Preferably, the main material in the S1 is bottle flakes, and the auxiliary material is ethylene glycol.
Compared with the prior art, the invention has the following advantages and effects: overall structure design is simple reasonable, safe and reliable, convenient operation, and the depolymerization viscosity-increasing is effectual, through reation kettle's pulling-on piece formula stirring structure for raw materials misce bene, the multistage vacuum pump evacuation of evacuation mechanism has improved viscosity, satisfies the user demand.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
In the figure: the device comprises a feeding section 1, a main material 2, an auxiliary material 3, a mixing bin 4, a screw mechanism 5, a speed reducer 6, a reaction kettle 7, a main shaft 8, a stirrer motor 9, a pull-tab type stirring structure 10, a biphenyl type heating layer 11, a vacuumizing mechanism 12, a first-stage vacuum unit 13, a second-stage vacuum unit 14, a third-stage vacuum unit 15, a discharging section 16, an online viscometer 17 and a pipeline 18.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, this embodiment reclaimed polyester bottle piece melt depolymerization viscosity-increasing device includes blending bunker 4, screw mechanism 5, reduction gear 6, feeding section 1, ejection of compact section 16, reation kettle 7, main shaft 8, agitator motor 9, pulling-on piece formula stirring structure 10 and evacuation mechanism 12, set up screw mechanism 5 in the blending bunker 4, this screw mechanism 5 links to each other with reduction gear 6, feeding section 1 sets up the upper end at blending bunker 4, reation kettle 7 links to each other with blending bunker 4, be provided with main shaft 8 in reation kettle 7, this main shaft 8 links to each other with agitator motor 9, be provided with pulling-on piece formula stirring structure 10 on the main shaft 8, reation kettle 7's upper end is provided with evacuation mechanism 12, ejection of compact section 16 sets up the lower extreme at reation kettle 7.
The periphery of the reaction kettle 7 and the outside of the pipeline 18 in the embodiment are both provided with a biphenyl heating layer 11.
The mixing bunker 4 in this embodiment is connected with the reaction kettle 7 through a pipeline 18, the reaction kettle 7 is connected with the evacuation through a pipeline 18, and the pipeline 18 is a stainless steel pipeline.
The lower portion of the discharging section 16 in this embodiment is provided with an in-line viscometer 17.
The vacuum pumping mechanism 12 in this embodiment adopts a multi-stage vacuum pumping structure, and the multi-stage vacuum pumping structure comprises a first-stage vacuum unit 13, a second-stage vacuum unit 14 and a third-stage vacuum unit 15 which are connected in sequence;
this embodiment sets up three levels of evacuation: the first-stage tackifying vacuum unit 13 is fully stirred in the reaction kettle 7 to ensure that the raw materials are uniform, the vacuumizing mechanism 12 is used for vacuumizing, and the higher the vacuumizing requirement is, the higher the viscosity of the product is; secondary tackifying: the primary vacuum unit 13 keeps 100-; the third-level vacuum machine set 15 keeps 30-100 Pa in the second level, and the viscosity is increased to 0.9-1.0d 1/g.
The method for melt depolymerization and tackifying of the recycled polyester bottle flakes comprises the following specific steps:
s1: the main material 2 and the auxiliary material 3 are added into the feeding section 1.
S2: the screw mechanism 5 in the mixing bin 4 is driven by the reducer 6 to move, and the mixture of the main material 2 and the auxiliary material 3 is mixed.
S3: then enters the reaction kettle 7 through a pipeline 18, and the stirrer motor 9 works to drive the main shaft 8 to act.
S4: then the main shaft 8 rotates to drive the pull-tab type stirring structure 10 to work; the oligomer in the mixture is carried through line 18 to the vacuum 12.
S5: the viscosity is improved by multi-stage vacuum pumping of the vacuum pumping mechanism 12.
S6: and a discharge section 16.
S7: recycled polyester bottle chips having a viscosity of 0.9 to 1.0d1/g were obtained by an in-line viscometer 17.
In the embodiment, the main material 2 is a bottle piece, and the auxiliary material 3 is ethylene glycol; and selecting materials and quantity according to actual conditions.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The utility model provides a tackification device is depolymerized in melting of regeneration polyester bottle piece, includes blending bunker, screw mechanism, reduction gear, feeding section and ejection of compact section, set up screw mechanism in the blending bunker, this screw mechanism links to each other with the reduction gear, and the feeding section sets up the upper end at the blending bunker, its characterized in that: still include reation kettle, main shaft, agitator motor, pulling-on piece formula stirring structure and evacuation mechanism, reation kettle links to each other with the blending bunker, is provided with the main shaft in the reation kettle, and this main shaft links to each other with the agitator motor, is provided with pulling-on piece formula stirring structure on the main shaft, and reation kettle's upper end is provided with evacuation mechanism, and the play material section sets up the lower extreme at reation kettle.
2. The melt depolymerization viscosity increasing device for recycled polyester bottle chips according to claim 1, characterized in that: still include the on-line viscosimeter, the lower part of ejection of compact section is provided with the on-line viscosimeter.
3. The melt depolymerization viscosity increasing device for recycled polyester bottle chips according to claim 1, characterized in that: still include the pipeline, all link to each other through the pipeline between blending bunker and the reation kettle, between reation kettle and the evacuation, this pipeline adopts stainless steel pipeline to make.
4. The melt depolymerization viscosity increasing device for recycled polyester bottle chips according to claim 3, characterized in that: still include biphenyl formula zone of heating, reation kettle is peripheral, the pipeline outside all sets up biphenyl formula zone of heating.
5. The melt depolymerization viscosity increasing device for recycled polyester bottle chips according to claim 1, characterized in that: the vacuumizing mechanism adopts a multi-stage vacuumizing structure.
6. The melt depolymerization viscosity increasing device for recycled polyester bottle chips as set forth in claim 5, is characterized in that: the multistage vacuumizing structure comprises a first-stage vacuum unit, a second-stage vacuum unit and a third-stage vacuum unit which are sequentially connected.
7. A method for melt depolymerization and viscosity increase of recycled polyester bottle chips, which comprises the melt depolymerization and viscosity increase device for recycled polyester bottle chips according to any one of claims 1 to 6, and is characterized in that: the method comprises the following specific steps:
s1: adding main materials and auxiliary materials into the feeding section;
s2: a screw mechanism in the mixing bin is driven by a speed reducer to act, and the main material and the auxiliary material are mixed;
s3: then enters the reaction kettle through a pipeline, and a stirrer motor works to drive the main shaft to act;
s4: then the main shaft rotates to drive the pull-tab type stirring structure to work; driving the oligomer in the mixture to pass through a pipeline to a vacuumizing mechanism;
s5: the viscosity is improved through multi-stage vacuum pumping of the vacuum pumping mechanism;
s6: discharging at a discharging section;
s7: the recycled polyester bottle chips with the viscosity of 0.9-1.0d1/g are obtained by an online viscometer.
8. The melt depolymerization viscosity increase process for recycled polyester bottle flakes according to claim 7, wherein: the main material in the S1 is bottle flakes, and the auxiliary material is glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111506973.9A CN114211719A (en) | 2021-12-10 | 2021-12-10 | Device and method for melt depolymerization and tackifying of recycled polyester bottle flakes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111506973.9A CN114211719A (en) | 2021-12-10 | 2021-12-10 | Device and method for melt depolymerization and tackifying of recycled polyester bottle flakes |
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| Publication Number | Publication Date |
|---|---|
| CN114211719A true CN114211719A (en) | 2022-03-22 |
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| CN202111506973.9A Pending CN114211719A (en) | 2021-12-10 | 2021-12-10 | Device and method for melt depolymerization and tackifying of recycled polyester bottle flakes |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470546A (en) * | 2003-06-15 | 2004-01-28 | 王泽新 | Liquid-phase continuous condensation polymerization apparatus of high-viscosity polyester (PET) |
| CN201815276U (en) * | 2010-10-19 | 2011-05-04 | 桐乡市华通化纤有限公司 | Polyester powder adding device |
| CN102731760A (en) * | 2012-07-17 | 2012-10-17 | 龙福环能科技股份有限公司 | Method for carrying out alcoholysis and then polymerization on recycled polyester bottle chip melts |
| WO2017092071A1 (en) * | 2015-11-30 | 2017-06-08 | 谭亦武 | Method and application for recycling and reusing waste pet |
| CN109569477A (en) * | 2018-11-09 | 2019-04-05 | 杨建强 | A kind of Screw Extrusion-autoclave stirring combination type reactor and its application |
| CN209302741U (en) * | 2018-10-24 | 2019-08-27 | 长春依多科化工有限公司 | A kind of reaction unit of the online viscosity measurements of band |
| CN110552085A (en) * | 2018-05-30 | 2019-12-10 | 陈大伟 | polyester waste cloth and waste silk recycling system and recycling method thereof |
-
2021
- 2021-12-10 CN CN202111506973.9A patent/CN114211719A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470546A (en) * | 2003-06-15 | 2004-01-28 | 王泽新 | Liquid-phase continuous condensation polymerization apparatus of high-viscosity polyester (PET) |
| CN201815276U (en) * | 2010-10-19 | 2011-05-04 | 桐乡市华通化纤有限公司 | Polyester powder adding device |
| CN102731760A (en) * | 2012-07-17 | 2012-10-17 | 龙福环能科技股份有限公司 | Method for carrying out alcoholysis and then polymerization on recycled polyester bottle chip melts |
| WO2017092071A1 (en) * | 2015-11-30 | 2017-06-08 | 谭亦武 | Method and application for recycling and reusing waste pet |
| CN110552085A (en) * | 2018-05-30 | 2019-12-10 | 陈大伟 | polyester waste cloth and waste silk recycling system and recycling method thereof |
| CN209302741U (en) * | 2018-10-24 | 2019-08-27 | 长春依多科化工有限公司 | A kind of reaction unit of the online viscosity measurements of band |
| CN109569477A (en) * | 2018-11-09 | 2019-04-05 | 杨建强 | A kind of Screw Extrusion-autoclave stirring combination type reactor and its application |
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