CN107538642A - A kind of Novel PET recovery process - Google Patents
A kind of Novel PET recovery process Download PDFInfo
- Publication number
- CN107538642A CN107538642A CN201610524143.1A CN201610524143A CN107538642A CN 107538642 A CN107538642 A CN 107538642A CN 201610524143 A CN201610524143 A CN 201610524143A CN 107538642 A CN107538642 A CN 107538642A
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- CN
- China
- Prior art keywords
- pet
- water
- bottle
- fragment
- tetrahydrofuran
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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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
A kind of Novel PET recovery process 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
Technical field
The present invention relates to plastic processing machinery field, particularly a kind of Novel PET recovery process.
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 Novel PET in PET
Recovery process.
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, 30-60 DEG C is heated to, 2h 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 55-70 after filter press filters
1h 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 55-70 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 65-85 DEG C in step (9).
Further, after tetrahydrofuran is substituted by dimethylbenzene in step (9), the heat time is 1h in step (10).
Further, after tetrahydrofuran is substituted by dimethylbenzene in step (9), heating-up temperature is 80-120 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, according to high 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, 30-60 DEG C is heated to, 2h 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 55-70 after filter press filters
1h 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 55-70 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,
65-85 DEG C is heated to, 2h 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
1h 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 80-120 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 (5)
1. a kind of Novel PET recovery process, 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 30-60 DEG C, stirs 2h, 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 55-70 DEG C of bar after filter press filters
1h is dried under part；
(11) distill：The tetrahydrofuran that PET fragment was cleaned in step (9) is introduced into distillation still, in 55-70 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.
2. a kind of Novel PET recovery process as claimed in claim 1, it is characterised in that tetrahydrofuran is by diformazan in step (9)
Benzene substitutes.
3. a kind of Novel PET recovery process as claimed in claim 2, it is characterised in that heating-up temperature is 65- in step (9)
85℃。
4. a kind of Novel PET recovery process as claimed in claim 2, it is characterised in that the heat time is 1h in step (10).
5. a kind of Novel PET recovery process as claimed in claim 2, it is characterised in that heating-up temperature is 80- in step (11)
120℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524143.1A CN107538642A (en) | 2016-06-29 | 2016-06-29 | A kind of Novel PET recovery process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524143.1A CN107538642A (en) | 2016-06-29 | 2016-06-29 | A kind of Novel PET recovery process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107538642A true CN107538642A (en) | 2018-01-05 |
Family
ID=60966434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524143.1A Pending CN107538642A (en) | 2016-06-29 | 2016-06-29 | A kind of Novel PET recovery process |
Country Status (1)
| Country | Link |
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| CN (1) | CN107538642A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954269A (en) * | 2020-07-20 | 2022-01-21 | 湖南耐力科技有限公司 | Recovery process of plastic leftover material |
-
2016
- 2016-06-29 CN CN201610524143.1A patent/CN107538642A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |