CN107538643A - A kind of waste plastics recovery technique - Google Patents

A kind of waste plastics recovery technique Download PDF

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Publication number
CN107538643A
CN107538643A CN201610524273.5A CN201610524273A CN107538643A CN 107538643 A CN107538643 A CN 107538643A CN 201610524273 A CN201610524273 A CN 201610524273A CN 107538643 A CN107538643 A CN 107538643A
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CN
China
Prior art keywords
pet
water
bottle
fragment
pvc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610524273.5A
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Chinese (zh)
Inventor
何永娜
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Tianjin Grace Technology Co Ltd
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Tianjin Grace Technology Co Ltd
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Publication date
Application filed by Tianjin Grace Technology Co Ltd filed Critical Tianjin Grace Technology Co Ltd
Priority to CN201610524273.5A priority Critical patent/CN107538643A/en
Publication of CN107538643A publication Critical patent/CN107538643A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/52Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling

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  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

A kind of waste plastics recovery technique disclosed by the invention, using PET and PVC different solubilities in specific solvent characteristic, by the dissolved impurity PVC in the presence of specific solvent, drying filter residue can obtain sterling PET.Effectively increase the purity of PET while can be with the recovery PVC plastic of by-product higher degree.

Description

A kind of waste plastics recovery technique
Technical field
The present invention relates to plastic processing machinery field, particularly a kind of waste plastics recovery technique.
Background technology
Plastics are daily necessities, the general designation of industrial goods for using plastics to be formed for main Raw material processing.Due to plastics A large amount of productions, consumption cause the quantity of plastic refuse to sharply increase with shorter service life.The a large amount of of plastics discard not only The huge waste of resource is caused, also brings high risks to environment:Contaminated soil and ocean, burning disposal generation largely have thing Matter.Become increasingly conspicuous in energy problem, environmental problem it is increasingly serious under the new situation, strengthen the research that technics of reclaim of plastic waste utilizes and draw The great attention of Qi Liao national governments.The recovery of waste or used plastics includes three phases:Collect, sort and recycle, existing rank The bottleneck of section restriction technics of reclaim of plastic waste is the sorting of plastics.
The content of the invention
The technical problems to be solved by the invention, which are to provide one kind, can separate and recover mixed pet waste in PET It is finely recovered technique.
Concrete technical scheme step of the present invention is as follows:
(1) feeding:The PET bottle of recovery is put on conveyer belt, strap and waste iron wire are removed during feeding;
(2) screen:The PET bottle that conveying comes in step (1) is removed into plastic sheet, PVC bottles, label, PE bottles in screening area Lid, stone impurity, leave behind white PET bottle;
(3) case of wet attrition:White PET bottle after being screened in step (2) is put into wet crushing mill, PET bottle is broken Various sizes of plastic flakes are broken into, waste water is transported in water treatment system;
(4) gravity rinses:PET fragment from step (3) out is mingled with bottle cap and is transported to a washing bucket In, the injected clear water into washing bucket, under the buoyancy of water, the density of the density ratio PET fragment of bottle cap is small, bottle cap drift Keep afloat, then salvage away the bottle cap swum on the water surface, by bottle cap and PET chip separation, caused waste water It is transported in water treatment system;
(5) thermokalite cleans:Piece alkali is put into washing bucket into step (4), then heated wash, removes plastic flakes Greasy dirt and dust;
(6) water rinses:The PET fragment Jing Guo step (5) is rinsed with water;
(7) centrifugal dehydration:PET fragment Jing Guo step (6) is put into centrifugal dehydrator, in the work of dewaterer With lower dehydration, the water removed on PET fragment is dirty;
(8) rinse:Plastic flakes conveying after being dehydrated in step (7) is got on, and is then put into rinsing device, is carried out Rinsing, thoroughly remove the glue for being bonded at and label being pasted on plastic flakes;
(9) purify:PET fragment in step (8) after rinsing is put into the stirred tank equipped with tetrahydrofuran In, 50-80 DEG C is heated to, 2.5h is stirred, the PVC impurity contained in PET fragments is dissolved into tetrahydrofuran;
(10) filter:PET fragments after being purified in step (9) are put into dryer in 60-90 after filter press filters 1.5h is dried under the conditions of DEG C;
(11) distill:The tetrahydrofuran that PET fragment was cleaned in step (9) is introduced into distillation still, at 65-95 DEG C Under the conditions of distill, distillate and be divided into tetrahydrofuran, reuse in the step (9), the residual thing of kettle is the PVC plastic of higher degree;
(12) pack:The PVC plastic point obtained in PET broken particle piece and step (11) after being dried in step (10) It is not transported in packaging bag and is packed.
Further, tetrahydrofuran is substituted by dimethylbenzene in step (9).
Further, after tetrahydrofuran is substituted by dimethylbenzene in step (9), heating-up temperature is 60-90 DEG C in step (9).
Further, after tetrahydrofuran is substituted by dimethylbenzene in step (9), the heat time is 2h in step (10).
Further, after tetrahydrofuran is substituted by dimethylbenzene in step (9), heating-up temperature is 70-110 in step (11) ℃。
The beneficial effects of the present invention are provide a kind of PVC plastic that can be separated and recovered with convenience and high-efficiency in PET Equipment.The purity of recycled PET plastics is effectively increased, reduces influence of the PVC impurity to PET properties.By-product goes out PVC simultaneously Plastics, improve economic benefit.
Embodiment
The embodiment of the present invention is further described with reference to embodiment, following examples are only used for more Clearly demonstrate technical scheme, and can not be limited the scope of the invention with this.
Embodiment 1
Concrete technical scheme step of the present invention is as follows:
(1) feeding:The PET bottle of recovery is put on conveyer belt, strap and waste iron wire are removed during feeding;
(2) screen:The PET bottle that conveying comes in step (1) is removed into plastic sheet, PVC bottles, label, PE bottles in screening area Lid, stone impurity, leave behind white PET bottle;
(3) case of wet attrition:White PET bottle after being screened in step (2) is put into wet crushing mill, PET bottle is broken Various sizes of plastic flakes are broken into, waste water is transported in water treatment system;
(4) gravity rinses:PET fragment from step (3) out is mingled with bottle cap and is transported to a washing bucket In, the injected clear water into washing bucket, under the buoyancy of water, the density of the density ratio PET fragment of bottle cap is small, bottle cap drift Keep afloat, then salvage away the bottle cap swum on the water surface, by bottle cap and PET chip separation, caused waste water It is transported in water treatment system;
(5) thermokalite cleans:Piece alkali is put into washing bucket into step (4), then heated wash, removes plastic flakes Greasy dirt and dust;
(6) water rinses:The PET fragment Jing Guo step (5) is rinsed with water;
(7) centrifugal dehydration:PET fragment Jing Guo step (6) is put into centrifugal dehydrator, in the work of dewaterer With lower dehydration, the water removed on PET fragment is dirty;
(8) rinse:Plastic flakes conveying after being dehydrated in step (7) is got on, and is then put into rinsing device, is carried out Rinsing, thoroughly remove the glue for being bonded at and label being pasted on plastic flakes;
(9) purify:PET fragment in step (8) after rinsing is put into the stirred tank equipped with tetrahydrofuran In, 50-80 DEG C is heated to, 2.5h is stirred, the PVC impurity contained in PET fragments is dissolved into tetrahydrofuran;
(10) filter:PET fragments after being purified in step (9) are put into dryer in 60-90 after filter press filters 1.5h is dried under the conditions of DEG C;
(11) distill:The tetrahydrofuran that PET fragment was cleaned in step (9) is introduced into distillation still, at 65-95 DEG C Under the conditions of distill, distillate and be divided into tetrahydrofuran, reuse in the step (9), the residual thing of kettle is the PVC plastic of higher degree;
(12) pack:The PVC plastic point obtained in PET broken particle piece and step (11) after being dried in step (10) It is not transported in packaging bag and is packed.
Embodiment 2
Concrete technical scheme step of the present invention is as follows:
(1) feeding:The PET bottle of recovery is put on conveyer belt, strap and waste iron wire are removed during feeding;
(2) screen:The PET bottle that conveying comes in step (1) is removed into plastic sheet, PVC bottles, label, PE bottles in screening area Lid, stone impurity, leave behind white PET bottle;
(3) case of wet attrition:White PET bottle after being screened in step (2) is put into wet crushing mill, PET bottle is broken Various sizes of plastic flakes are broken into, waste water is transported in water treatment system;
(4) gravity rinses:PET fragment from step (3) out is mingled with bottle cap and is transported to a washing bucket In, the injected clear water into washing bucket, under the buoyancy of water, the density of the density ratio PET fragment of bottle cap is small, bottle cap drift Keep afloat, then salvage away the bottle cap swum on the water surface, by bottle cap and PET chip separation, caused waste water It is transported in water treatment system;
(5) thermokalite cleans:Piece alkali is put into washing bucket into step (4), then heated wash, removes plastic flakes Greasy dirt and dust;
(6) water rinses:The PET fragment Jing Guo step (5) is rinsed with water;
(7) centrifugal dehydration:PET fragment Jing Guo step (6) is put into centrifugal dehydrator, in the work of dewaterer With lower dehydration, the water removed on PET fragment is dirty;
(8) rinse:Plastic flakes conveying after being dehydrated in step (7) is got on, and then puts into rinsing device
(9) purify:PET fragment in step (8) after rinsing is put into the stirred tank equipped with dimethylbenzene, 60-90 DEG C is heated to, 1h is stirred, the PVC impurity contained in PET fragments is dissolved into dimethylbenzene;
(10) filter:PET fragments after being purified in step (9) are put into dryer in 65-70 after filter press filters 2h is dried under the conditions of DEG C;
(11) distill:The dimethylbenzene that PET fragment was cleaned in step (9) is introduced into distillation still, at 70-110 DEG C Under the conditions of distill, distillate and be divided into dimethylbenzene, reuse in the step (9), the residual thing of kettle is the PVC plastic of higher degree;
(12) pack:The PVC plastic point obtained in PET broken particle piece and step (11) after being dried in step (10) It is not transported in packaging bag and is packed.
One embodiment of the present of invention is described in detail above, but the content is only the preferable implementation of the present invention Example, it is impossible to be considered as the practical range for limiting the present invention.All equivalent changes made according to the present patent application scope and improvement Deng, all should still belong to the present invention patent covering scope within.

Claims (1)

1. a kind of waste plastics recovery technique, it is characterised in that concrete technical scheme step of the present invention is as follows:
(1) feeding:The PET bottle of recovery is put on conveyer belt, strap and waste iron wire are removed during feeding;
(2) screen:The PET bottle that conveying comes in step (1) is removed into plastic sheet, PVC bottles, label, PE bottle caps, stone in screening area Sub- impurity, leave behind white PET bottle;
(3) case of wet attrition:White PET bottle after being screened in step (2) is put into wet crushing mill, PET bottle is broken into Various sizes of plastic flakes, waste water are transported in water treatment system;
(4) gravity rinses:PET fragment from step (3) out is mingled with bottle cap and is transported in a washing bucket, to Injected clear water in washing bucket, under the buoyancy of water, the density of the density ratio PET fragment of bottle cap is small, and bottle cap is swum in The water surface, then the bottle cap swum on the water surface is salvaged away, by bottle cap and PET chip separation, caused waste water conveying Into water treatment system;
(5) thermokalite cleans:Piece alkali is put into washing bucket into step (4), then heated wash, remove the greasy dirt of plastic flakes And dust;
(6) water rinses:The PET fragment Jing Guo step (5) is rinsed with water;
(7) centrifugal dehydration:PET fragment Jing Guo step (6) is put into centrifugal dehydrator, in the presence of dewaterer Dehydration, the water removed on PET fragment are dirty;
(8) rinse:Plastic flakes conveying after being dehydrated in step (7) is got on, and is then put into rinsing device, is floated Wash, thoroughly remove the glue for being bonded at and label being pasted on plastic flakes;
(9) purify:PET fragment in step (8) after rinsing is put into the stirred tank equipped with tetrahydrofuran, added Heat arrives 50-80 DEG C, stirs 2.5h, the PVC impurity contained in PET fragments is dissolved into tetrahydrofuran;
(10) filter:PET fragments after being purified in step (9) are put into dryer in 60-90 DEG C of bar after filter press filters 1.5h is dried under part;
(11) distill:The tetrahydrofuran that PET fragment was cleaned in step (9) is introduced into distillation still, in 65-95 DEG C of condition Lower distillation, distillates and is divided into tetrahydrofuran, is reused in step (9), and the residual thing of kettle is the PVC plastic of higher degree;
(12) pack:The PVC plastic difference obtained in PET broken particle piece and step (11) after being dried in step (10) is defeated It is sent in packaging bag and is packed.
CN201610524273.5A 2016-06-29 2016-06-29 A kind of waste plastics recovery technique Pending CN107538643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610524273.5A CN107538643A (en) 2016-06-29 2016-06-29 A kind of waste plastics recovery technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610524273.5A CN107538643A (en) 2016-06-29 2016-06-29 A kind of waste plastics recovery technique

Publications (1)

Publication Number Publication Date
CN107538643A true CN107538643A (en) 2018-01-05

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Application Number Title Priority Date Filing Date
CN201610524273.5A Pending CN107538643A (en) 2016-06-29 2016-06-29 A kind of waste plastics recovery technique

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109080033A (en) * 2018-09-12 2018-12-25 临武县华湘再生资源回收有限公司 A kind of method and apparatus of waste plastics deodorization in house refuse
CN113954269A (en) * 2020-07-20 2022-01-21 湖南耐力科技有限公司 Recovery process of plastic leftover material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109080033A (en) * 2018-09-12 2018-12-25 临武县华湘再生资源回收有限公司 A kind of method and apparatus of waste plastics deodorization in house refuse
CN113954269A (en) * 2020-07-20 2022-01-21 湖南耐力科技有限公司 Recovery process of plastic leftover material

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Application publication date: 20180105