CN105479621A - Method for recycling waste plastic of paper mill - Google Patents
Method for recycling waste plastic of paper mill Download PDFInfo
- Publication number
- CN105479621A CN105479621A CN201510944258.1A CN201510944258A CN105479621A CN 105479621 A CN105479621 A CN 105479621A CN 201510944258 A CN201510944258 A CN 201510944258A CN 105479621 A CN105479621 A CN 105479621A
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- China
- Prior art keywords
- plastics
- paper mill
- solvent
- waste
- plastic
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Classifications
-
- 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
- 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
- B29B2017/001—Pretreating the materials before recovery
-
- 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)
- Environmental & Geological Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention relates to a method for recycling waste plastic of a paper mill. The method includes the following processes of firstly, breaking, secondly, washing and classification, thirdly, lime emulsion treatment, fourthly, solvent re-treatment, fifthly, paint release, and sixthly pelletization, wherein in the first process, the waste plastic of the paper mill is smashed; in the second process, the smashed waste plastic of the paper mill is washed through a cyclone hydraulic separator to obtain polyolefin plastic; in the third process, the obtained polyolefin plastic is subjected to lime emulsion treatment; in the fourth process, the polyolefin plastic subjected to lime emulsion treatment is separated and purified through a solvent; in the fifth process, the polyolefin plastic retreated through the solvent is soaked in a paint release agent, so that paint is released; and in the sixth process, the polyolefin plastic subjected to paint release treatment is fused, extruded and pelletized, so that milky aggregate is obtained. By the adoption of the method for recycling the waste plastic, a main material adopted in the method originates from the waste plastic of the paper mill, the environmental pollution problem caused by incineration and landfill of the waste plastic is solved, and the method accords with the environment-friendly sustainable development route.
Description
Technical field
The invention belongs to the technical field of the recoverying and utilizing method of waste plastics, be specifically related to the method that the waste plastics recovery of a kind of paper mill utilizes.
Background technology
Along with developing rapidly of plastic products industry, plastic products become inseparable with the productive life of the mankind, and a large amount of plastic products, by extensively, have supervened a large amount of waste plastics.The recycling of waste plastics, is the important channel of turning waste into wealth and solving ecological environmental pollution, is generally subject to the attention of countries in the world.But the waste plastics that many times have ignored in the waste paper reclaimed in paper mill, its usual content accounts for about 0.6%, although amount is of a great variety less, as polypropylene, polyethylene, polyester etc., wherein the plastics of TPO account for higher proportion.For these waste plastics, sell other enterprise's reclaiming plastics or oil refining outside some paper mill, also some paper mill adopts incinerator to process.But all there is certain deficiency in these traditional processing methods, as directly waste plastics melt extruded granulation, owing to being mixed plastic, containing a certain amount of impurity, in the process of heating extruding, cause mould district pressure excessive, make screw rod serious wear, screw rod rotational shear friction simultaneously produces waste heat, causes plastics, incipient scorch, affects the quality of plastic grain.Landfill and burn not only contaminated environment, the more important thing is and do not turned waste into wealth by waste plastics, recycles.Therefore, waste or used plastics being carried out resource recycling key is need to improve existing recovery process.
A kind of waste or used plastics separation and recovery Application way that Chinese patent 104608286A provides, the method cleaning separative efficiency is good, and break process ability is large, but is only by pickling, sorting process, and reclaim the plastics color obtained and mix, quality is not high; The waste plastics recovery recycling technique that patent 103522449A provides, this technique is simple, easy, the object reclaiming waste plastics can be reached, but part of aluminizing in waste plastics is not processed in this technique, in granulation process, such impurity, to screw machine serious wear, causes parts of plastics to decompose, burn, the plastics inferior quality of recovery.In above patent, major part is for plastic leftover bits or the recycled plastic sorted out, and seldom carries out resource recycling for paper plant's waste plastics.
Summary of the invention
The object of the present invention is to provide the method that the waste plastics recovery of a kind of paper plant utilizes, TPO plastics are obtained by cleaning classification, carry out the composition of aluminizing in lime slurry process removal waste plastics, solvent reprocessing, deinking, depainting, need not dry after cleaning, directly enter the singe screw extruding machine that extrusion molding leading portion is provided with apopore, extrusion process is first extruded the moisture in plastics, make water squeezing and extrusion molding integration, the plastics quality that the method obtains is better, has higher economic worth, meets waste plastics comprehensive utilization of resources direction.
In order to realize foregoing invention object, technical scheme of the present invention is as follows:
The method that paper mill waste plastics recovery utilizes, comprises following process:
(1) broken: paper mill waste plastics is pulverized;
(2) cleaning classification: the paper mill waste plastics after step (1) being pulverized adopts cyclone hydraulic separators to carry out cleaning and obtains TPO plastics;
(3) lime slurry process: the described polyolefin plastics that step (2) obtains is carried out lime slurry process, to remove the part of aluminizing in described polyolefin plastics;
(4) solvent reprocessing: the polyolefin plastics of step (3) after lime slurry process is undertaken being separated by solvent, purifying;
(5) depainting: use paint stripper to carry out immersion depainting the polyolefin plastics of step (4) after solvent reprocessing;
(6) granulation: by the polyolefin plastics melting after step (5) depainting process, extrude, granulation.
Preferably, paper mill waste plastics is pulverized in (1) by described step, is ground into the fragment of 2 ~ 3 centimetres.
Preferably, one or more in the solvent selected from ethanol in described step (4), acetone, toluene, benzinum, chloroform, N-N dimethylacetylamide, N-N dimethyl formamide, dimethylbenzene, ethyl acetate, solvent naphtha.
Preferably, the described paint stripper of step (5) is selected from the one in following three kinds:: be calculated in mass percent, a) three monochloroacetic acids 25%, chlorinated solvents 20%, phosphorus cresols 25% and water 30%; B) carrene 72%, monoethanolamine 10%, ethylene glycol ethyl ether 4%, methylcellulose 3%, sodium alkyl benzene sulfonate 5%, paraffin 3% and water 3%; C) methyl alcohol 11%, carrene 72%, ethylene glycol ethyl ether 4%, methylcellulose 2%, plasticizer 5%, paraffin: 3% and water 3%.
Preferably, described step (5) soaks the soak time of depainting is 30 minutes.
The invention has the beneficial effects as follows:
(1) plastics recycling method provided by the invention, its major ingredient comes from paper plant's waste or used plastics, the problem of environmental pollution that the method not only solves burning, landfill waste plastics brings, and meets green, the sustainable development route of country;
(2) the present invention has added lime slurry process in processing procedure, this process solves the screw rod serious wear of waste or used plastics because causing containing impurity such as more aluminized plastic sheets, the problem such as then cause the decomposition of plastics, burn, affects extrusion plastic particle quality; In the method that this patent provides simultaneously, adopt singe screw extruding machine, plastic sheet after (being provided with apopore at the leading portion of extrusion molding) makes cleaning need not be dried, directly enter singe screw extruding machine extruding pelletization, reduce the energy consumption cost of recovery, the plastic grain quality simultaneously obtained is better, has good economy and environment benefit.
Detailed description of the invention
Below in conjunction with instantiation, illustrate the present invention further.Should be appreciated that, these embodiments only for illustration of the present invention, and are not intended to limit the scope of the invention.The improvement made according to the present invention of technical staff and adjustment, still belong to protection scope of the present invention in actual applications.
Except special instruction, the equipment that the present invention uses and reagent are the conventional commercial products of the art.In the present invention, chlorinated solvents comprises carrene, chloroform, tetrachloromethane, dichloroethanes, chloroethanes, chloropropane, chlorobutane etc., its any one chlorinated solvents expected for those skilled in the art, plasticizer is any one plasticizer that it may occur to persons skilled in the art that.
Embodiment 1
By paper mill waste plastic product, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; Recycling alcohol solvent further separation and purification after cleaning, sends into the material obtained that composition is three monochloroacetic acids, the depainting drill traverse of chlorinated solvents, phosphorus cresols and water steeps 30 minutes, and send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Embodiment 2
By paper plant's waste or used plastics goods, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; The further separation and purification of recycling solvent naphtha after cleaning, the depainting drill traverse being methyl alcohol, carrene, ethylene glycol ethyl ether, methylcellulose, plasticizer, paraffin and water by the material obtained feeding composition steeps 30 minutes, send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Embodiment 3
By paper plant's waste or used plastics goods, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; The further separation and purification of mixed solvent of recycling acetone and benzinum after cleaning, the depainting drill traverse being carrene, monoethanolamine, ethylene glycol ethyl ether, methylcellulose, sodium alkyl benzene sulfonate, paraffin and water by the material obtained feeding composition steeps 30 minutes, send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Embodiment 4
By paper plant's waste or used plastics goods, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; Recycling toluene and the further separation and purification of chloroform mixed solvent after cleaning, the depainting drill traverse being methyl alcohol, carrene, ethylene glycol ethyl ether, methylcellulose, plasticizer, paraffin and water by the material obtained feeding composition steeps 30 minutes, send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Embodiment 5
By paper plant's waste or used plastics goods, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; Recycling dimethylbenzene and the further separation and purification of N-N dimethyl formamide after cleaning, the material obtained is sent into composition is three monochloroacetic acids, the depainting drill traverse of chlorinated solvents, phosphorus cresols and water steeps 30 minutes, send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Embodiment 6
By paper plant's waste or used plastics goods, send into pulverizer through feeder, discharging is the fragment of 2 ~ 3 centimetres, combines in fragment pond after pulverizing; After service sink washing, adopt cyclone hydraulic separators to separate TPO plastics, then the TPO plastics obtained are combined in the part of aluminizing be equipped with in milk of lime liquid pool removal plastics; The further separation and purification of mixed solvent of recycling ethyl acetate and N-N dimethylacetylamide after cleaning, the depainting drill traverse being methyl alcohol, carrene, ethylene glycol ethyl ether, methylcellulose, plasticizer, paraffin and water by the material obtained feeding composition steeps 30 minutes, send into stirring and washing in tank after soaking, waste water recycles after precipitation; Finally the material cleaned after the depainting obtained is carried out extruding pelletization, obtain milky pellet.
Pellet prepared by embodiment 1 ~ 6 and prepare the method for this pellet, compare with CN104608286A, it prepares effective, and reclaiming the plastics color obtained is milky, quality better; Compare it to process part of aluminizing in waste plastics with CN103522449A, in granulation process, adopt singe screw extruding machine, plastic sheet after (being provided with apopore at the leading portion of extrusion molding) makes cleaning need not be dried, directly enter singe screw extruding machine extruding pelletization, reduce the energy consumption cost of recovery, the plastic grain quality simultaneously obtained is better, has good economy and environment benefit.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of patent protection of this case.
Claims (5)
1. a method for paper mill waste plastics recovery utilization, is characterized in that, comprise following process:
(1) broken: paper mill waste plastics is pulverized;
(2) cleaning classification: the paper mill waste plastics after step (1) being pulverized adopts cyclone hydraulic separators to carry out cleaning and obtains TPO plastics;
(3) lime slurry process: the described polyolefin plastics that step (2) obtains is carried out lime slurry process, to remove the part of aluminizing in described polyolefin plastics;
(4) solvent reprocessing: the polyolefin plastics of step (3) after lime slurry process is undertaken being separated by solvent, purifying;
(5) depainting: use paint stripper to carry out immersion depainting the polyolefin plastics of step (4) after solvent reprocessing;
(6) granulation: by the polyolefin plastics melting after step (5) depainting process, extrude, granulation.
2. the method for paper mill according to claim 1 waste plastics recovery utilization, it is characterized in that, paper mill waste plastics is pulverized in (1) by described step, is ground into the fragment of 2 ~ 3 centimetres.
3. the method for paper mill according to claim 1 waste plastics recovery utilization, it is characterized in that, one or more in the solvent selected from ethanol in described step (4), acetone, toluene, benzinum, chloroform, N-N dimethylacetylamide, N-N dimethyl formamide, dimethylbenzene, ethyl acetate, solvent naphtha.
4. the method for paper mill according to claim 1 waste plastics recovery utilization, it is characterized in that, the described paint stripper of step (5) is selected from the one in following three kinds: be calculated in mass percent, a) three monochloroacetic acids 25%, chlorinated solvents 20%, phosphorus cresols 25% and water 30%; B) carrene 72%, monoethanolamine 10%, ethylene glycol ethyl ether 4%, methylcellulose 3%, sodium alkyl benzene sulfonate 5%, paraffin 3% and water 3%; C) methyl alcohol 11%, carrene 72%, ethylene glycol ethyl ether 4%, methylcellulose 2%, plasticizer 5%, paraffin: 3% and water 3%.
5. the method for paper mill according to claim 1 waste plastics recovery utilization, is characterized in that, the soak time that described step (5) soaks depainting is 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510944258.1A CN105479621A (en) | 2015-12-16 | 2015-12-16 | Method for recycling waste plastic of paper mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510944258.1A CN105479621A (en) | 2015-12-16 | 2015-12-16 | Method for recycling waste plastic of paper mill |
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| Publication Number | Publication Date |
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| CN105479621A true CN105479621A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510944258.1A Pending CN105479621A (en) | 2015-12-16 | 2015-12-16 | Method for recycling waste plastic of paper mill |
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| CN (1) | CN105479621A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107553777A (en) * | 2017-09-27 | 2018-01-09 | Tcl通力电子（惠州）有限公司 | Method for separating double-color injection molding parts |
| CN108099055A (en) * | 2017-12-18 | 2018-06-01 | 太仓颢睦环保设备有限公司 | Aluminum-plastic separation recovery system and method |
| CN115335444A (en) * | 2020-04-15 | 2022-11-11 | 宝洁公司 | Reduction of surface and bulk contamination in plastics |
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| JP4011379B2 (en) * | 2002-03-28 | 2007-11-21 | シャープ株式会社 | Recycling method of waste thermoplastic resin composition |
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| CN102888141A (en) * | 2012-09-24 | 2013-01-23 | 中国人民解放军第五七一九工厂 | Paint remover for removing epoxy primer and polyurethane finish coating |
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-
2015
- 2015-12-16 CN CN201510944258.1A patent/CN105479621A/en active Pending
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| JP4011379B2 (en) * | 2002-03-28 | 2007-11-21 | シャープ株式会社 | Recycling method of waste thermoplastic resin composition |
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| CN102888141A (en) * | 2012-09-24 | 2013-01-23 | 中国人民解放军第五七一九工厂 | Paint remover for removing epoxy primer and polyurethane finish coating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107553777A (en) * | 2017-09-27 | 2018-01-09 | Tcl通力电子（惠州）有限公司 | Method for separating double-color injection molding parts |
| CN107553777B (en) * | 2017-09-27 | 2020-04-10 | Tcl通力电子（惠州）有限公司 | Method for separating double-color injection molding parts |
| CN108099055A (en) * | 2017-12-18 | 2018-06-01 | 太仓颢睦环保设备有限公司 | Aluminum-plastic separation recovery system and method |
| CN115335444A (en) * | 2020-04-15 | 2022-11-11 | 宝洁公司 | Reduction of surface and bulk contamination in plastics |
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Application publication date: 20160413 |