CN102873792B - Method for separating renewable polyester bottle flakes by using method of specific gravity - Google Patents

Method for separating renewable polyester bottle flakes by using method of specific gravity Download PDF

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Publication number
CN102873792B
CN102873792B CN201210399444.8A CN201210399444A CN102873792B CN 102873792 B CN102873792 B CN 102873792B CN 201210399444 A CN201210399444 A CN 201210399444A CN 102873792 B CN102873792 B CN 102873792B
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China
Prior art keywords
polyester bottle
white oil
solution
sodium chloride
renewable polyester
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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.)
Expired - Fee Related
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CN201210399444.8A
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Chinese (zh)
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CN102873792A (en
Inventor
钱军
王方河
邢喜全
贾同伟
杜芳
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Ningbo Dafa Chemical Fiber Co Ltd
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Ningbo Dafa Chemical Fiber Co Ltd
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Priority to CN201210399444.8A priority Critical patent/CN102873792B/en
Publication of CN102873792A publication Critical patent/CN102873792A/en
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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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  • Detergent Compositions (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The invention relates to the filed of renewable polyester bottle flake recycling, and relates to a method for separating renewable polyester bottle flakes by using a method of specific gravity. The method for separating renewable polyester bottle flakes by using a method of specific gravity comprises the following steps of: configuring a saturated sodium chloride solution; adding an industrial white oil-water solution subjected to industrial emulsification into the saturated sodium chloride solution; putting renewable polyester bottle flakes into a mixing tank, so that in the process of mixing, metal or nonmetal impurities with a specific gravity of greater than 1.50 g/cm<3> are gradually sunk at the bottom of a separation device, and the renewable polyester bottle flakes are suspended on the surface of the mixed solution; and taking the suspended renewable polyester bottle flakes by using a specialized mechanical device, so that the separation of renewable polyester bottle flakes can be realized. The method has the characteristics of non-toxicity, non-odor, no corrosion, easy preparation, small ambient temperature influence, easy recovery, low cost, easy cleaning in the next process, and capability of being recycled.

Description

The method of hydrometer method separation regeneration polyester bottle slice
Technical field
The present invention relates to a kind of regenerative piece of polyester bottle and recycle field, particularly relate to a kind of regenerative piece of polyester bottle separation method.
Background technology
At present, keep away in PET bottle sheet removal process and unavoidably there are metal (iron filings, aluminium skin, copper scale etc.) impurity and nonmetallic inclusion (sand, cement block, stone etc.), these impurity scrap iron removings can be separated at the scraps of paper with strong magnetic, outside removing in cleaned process or pouring process, aluminium skin, copper scale, sand, stone, cement blocks etc. do not have magnetic or proportion compared with PET bottle sheet than heavy because of it, usually with single solution (as saturated brine, calcium chloride solution etc.) being separated of PET bottle sheet and above-mentioned impurity cannot be realized, and the existence of these impurity will have a strong impact on filter, the spinning cycle of assembly, and flood dragon is used in minimizing such as cleaning, dewaterer, screw rod, the service life of filter net sheet.Although and existing electrostatic separation, FLOTATION SEPARATION etc. can occasionally realize partial impurities separation but because its cost is high, equipment investment expense is large, the reasons such as the efficiency of separation is low, not yet reach the requirement of suitability for industrialized production.
Summary of the invention
In order to solve above-mentioned technical problem, the object of this invention is to provide a kind of method of hydrometer method separation regeneration polyester bottle slice, the method has nontoxic, tasteless, corrosion-free, easy proportioning, influenced by ambient temperature little, easily reclaim, cost is low, next procedure easy cleaning, the feature of reusable edible.
In order to realize above-mentioned object, present invention employs following technical scheme:
The method of hydrometer method separation regeneration polyester bottle slice, the method comprises the following steps:
1) configuration of sodium chloride saturated solution, adds enough industrial sodium chloride in agitator tank, and then add water stirring, and the solution after stirring is sodium chloride saturated solution;
2) in sodium chloride saturated solution, add the technical white oil aqueous solution after industrial emulsion, in the technical white oil aqueous solution, emulsifying agent accounts for 5% ~ 20% of white oil weight, and the proportion of the mixed solution of saturated nacl aqueous solution and white oil is just 1.38 ~ 1.50g/cm 3;
3) drop in agitator tank by regenerative piece of polyester bottle, in whipping process, proportion is greater than 1.50g/cm 3metal or nonmetallic inclusion sink to the bottom of separator gradually, regenerative piece of polyester bottle is then suspended in the surface of this mixed solution, and the regenerative piece of polyester bottle using special mechanical device to fish for suspension just can realize the separation of regenerative piece of polyester bottle.
As preferably, the proportion of described saturated nacl aqueous solution and the mixed solution of white oil is 1.40 ~ 1.48g/cm 3.
As preferably, the preparation method of the described technical white oil aqueous solution is as follows: at ambient temperature, after emulsifying agent and white oil mix in proportion, under agitation, add quantitative water gradually, form water-in-oil system, keep 20 ~ 60 minutes under this viscous pasty state, then add water gradually, stir.
As preferably, described emulsifying agent adopts nonionic emulsifier.
The present invention, owing to have employed above-mentioned technical scheme, may be used for being separated PET bottle sheet or other density and is less than 1.33g/cm 3plastics in the magnetic that contains and non-magnetic impurity, adopts the little PET bottle sheet of the method density or bottle neck to float over and be suspended in the middle of solution, and density is much larger than 1.5g/cm 3magnetic metal or nonmagnetic metal and sand, stone etc. can separate with PET bottle sheet, bottle neck easily.Method of the present invention has nontoxic, tasteless, corrosion-free, easy proportioning, influenced by ambient temperature little, and easily reclaim, cost is low, next procedure easy cleaning, the feature of reusable edible.
Detailed description of the invention
embodiment 1
The method of hydrometer method separation regeneration polyester bottle slice, the method comprises the following steps: 1) configuration of sodium chloride saturated solution, in agitator tank, add enough industrial sodium chloride, then add water stirring, and the solution after stirring is sodium chloride saturated solution.2) in sodium chloride saturated solution, add the technical white oil aqueous solution after industrial emulsion, in the technical white oil aqueous solution, emulsifying agent accounts for 10% of white oil weight, emulsifying agent adopts nonionic emulsifier, and the proportion of the mixed solution of saturated nacl aqueous solution and white oil is just 1.38g/cm 3; The preparation method of the technical white oil aqueous solution is as follows: at ambient temperature, after emulsifying agent and white oil mix in proportion, under agitation, adds quantitative water gradually, forms water-in-oil system, keeps 20 minutes, then add water gradually under this viscous pasty state, stirs.3) drop in agitator tank by regenerative piece of polyester bottle, in whipping process, proportion is greater than 1.50g/cm 3metal or nonmetallic inclusion sink to the bottom of separator gradually, regenerative piece of polyester bottle is then suspended in the surface of this mixed solution, and the regenerative piece of polyester bottle using special mechanical device to fish for suspension just can realize the separation of regenerative piece of polyester bottle.
embodiment 2
The method of hydrometer method separation regeneration polyester bottle slice, the method comprises the following steps: 1) configuration of sodium chloride saturated solution, in agitator tank, add enough industrial sodium chloride, then add water stirring, and the solution after stirring is sodium chloride saturated solution.2) in sodium chloride saturated solution, add the technical white oil aqueous solution after industrial emulsion, in the technical white oil aqueous solution, emulsifying agent accounts for 15% of white oil weight, emulsifying agent adopts nonionic emulsifier, and the proportion of the mixed solution of saturated nacl aqueous solution and white oil is just 1.40g/cm 3; The preparation method of the technical white oil aqueous solution is as follows: at ambient temperature, after emulsifying agent and white oil mix in proportion, under agitation, adds quantitative water gradually, forms water-in-oil system, keeps 30 minutes, then add water gradually under this viscous pasty state, stirs.3) drop in agitator tank by regenerative piece of polyester bottle, in whipping process, proportion is greater than 1.50g/cm 3metal or nonmetallic inclusion sink to the bottom of separator gradually, regenerative piece of polyester bottle is then suspended in the surface of this mixed solution, and the regenerative piece of polyester bottle using special mechanical device to fish for suspension just can realize the separation of regenerative piece of polyester bottle.
embodiment 3
The method of hydrometer method separation regeneration polyester bottle slice, the method comprises the following steps: 1) configuration of sodium chloride saturated solution, in agitator tank, add enough industrial sodium chloride, then add water stirring, and the solution after stirring is sodium chloride saturated solution.2) in sodium chloride saturated solution, add the technical white oil aqueous solution after industrial emulsion, in the technical white oil aqueous solution, emulsifying agent accounts for 20% of white oil weight, emulsifying agent adopts nonionic emulsifier, and the proportion of the mixed solution of saturated nacl aqueous solution and white oil is just 1.45g/cm 3; The preparation method of the technical white oil aqueous solution is as follows: at ambient temperature, after emulsifying agent and white oil mix in proportion, under agitation, adds quantitative water gradually, forms water-in-oil system, keeps 30 minutes, then add water gradually under this viscous pasty state, stirs.3) drop in agitator tank by regenerative piece of polyester bottle, in whipping process, proportion is greater than 1.50g/cm 3metal or nonmetallic inclusion sink to the bottom of separator gradually, regenerative piece of polyester bottle is then suspended in the surface of this mixed solution, and the regenerative piece of polyester bottle using special mechanical device to fish for suspension just can realize the separation of regenerative piece of polyester bottle.

Claims (3)

1. the method for hydrometer method separation regeneration polyester bottle slice, is characterized in that the method comprises the following steps:
1) configuration of sodium chloride saturated solution, adds enough industrial sodium chloride in agitator tank, and then add water stirring, and the solution after stirring is sodium chloride saturated solution;
2) in sodium chloride saturated solution, add the technical white oil aqueous solution after industrial emulsion, in the technical white oil aqueous solution, emulsifying agent accounts for 5% ~ 20% of white oil weight, and the proportion of the mixed solution of saturated nacl aqueous solution and white oil is just 1.38 ~ 1.50g/cm 3; The preparation method of the technical white oil aqueous solution is as follows: at ambient temperature, after emulsifying agent and white oil mix in proportion, under agitation, add quantitative water gradually, form water-in-oil system, keep 20 ~ 60 minutes under this viscous pasty state, add water gradually again, stir;
3) drop in agitator tank by regenerative piece of polyester bottle, in whipping process, proportion is greater than 1.50g/cm 3metal or nonmetallic inclusion sink to the bottom of separator gradually, regenerative piece of polyester bottle is then suspended in the surface of this mixed solution, and the regenerative piece of polyester bottle using special mechanical device to fish for suspension just can realize the separation of regenerative piece of polyester bottle.
2. the method for hydrometer method separation regeneration polyester bottle slice according to claim 1, is characterized in that: the proportion of the mixed solution of saturated nacl aqueous solution and white oil is 1.40 ~ 1.48g/cm 3.
3. the method for hydrometer method separation regeneration polyester bottle slice according to claim 1, is characterized in that: emulsifying agent adopts nonionic emulsifier.
CN201210399444.8A 2012-10-19 2012-10-19 Method for separating renewable polyester bottle flakes by using method of specific gravity Expired - Fee Related CN102873792B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109822780B (en) * 2019-03-25 2021-06-29 苏州律点信息科技有限公司 Production equipment for separating regenerated polyester bottle flakes by hydrometer method

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051880A (en) * 1989-11-24 1991-06-05 中国石油化工总公司抚顺石油化工研究院 Scrap electrical wires, electrical cables separate reclaim the method for metallic conductor and plastics
US6095441A (en) * 1997-05-09 2000-08-01 Baker Hughes (Deutschland) Gmbh Process of separating mixed plastic waste into light and heavy plastic phases
CN1267591A (en) * 1999-03-17 2000-09-27 普雷马克Rwp控股公司 ABS recovery method
JP3665758B2 (en) * 2001-10-30 2005-06-29 日本シーム株式会社 Waste crushing and cleaning method and crushing and cleaning apparatus
CN1659007A (en) * 2002-04-12 2005-08-24 Mba聚合物公司 Multistep separation of plastics
CN1903542A (en) * 2005-07-25 2007-01-31 梅罗尼设计有限公司 Method and equipment for recycling plastic material
CN101234362A (en) * 2008-01-17 2008-08-06 杭州富兴环保机械有限公司 Polyester beverage bottle recycle liquid separation method and special-purpose equipment thereof
CN101605843A (en) * 2007-02-09 2009-12-16 陶氏康宁公司 The method of plastics recirculation
CN201482588U (en) * 2009-08-06 2010-05-26 宁波大发化纤有限公司 Paper scraps separator of bottle flake raw materials
CN102223954A (en) * 2008-09-30 2011-10-19 加洛塑料公司 Process for the selective separation, and for the simultaneous increase in purity, of spent, fragmented, organic materials by means of aqueous media having chosen densities
CN202277880U (en) * 2011-11-03 2012-06-20 宁波大发化纤有限公司 Device for wiping off aluminum sheets in PET bottle sheets using hydrometer method
CN102574304A (en) * 2009-10-02 2012-07-11 日立造船株式会社 Method and facility for sorting and separating waste plastic

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051880A (en) * 1989-11-24 1991-06-05 中国石油化工总公司抚顺石油化工研究院 Scrap electrical wires, electrical cables separate reclaim the method for metallic conductor and plastics
US6095441A (en) * 1997-05-09 2000-08-01 Baker Hughes (Deutschland) Gmbh Process of separating mixed plastic waste into light and heavy plastic phases
CN1267591A (en) * 1999-03-17 2000-09-27 普雷马克Rwp控股公司 ABS recovery method
JP3665758B2 (en) * 2001-10-30 2005-06-29 日本シーム株式会社 Waste crushing and cleaning method and crushing and cleaning apparatus
CN1659007A (en) * 2002-04-12 2005-08-24 Mba聚合物公司 Multistep separation of plastics
CN1903542A (en) * 2005-07-25 2007-01-31 梅罗尼设计有限公司 Method and equipment for recycling plastic material
CN101605843A (en) * 2007-02-09 2009-12-16 陶氏康宁公司 The method of plastics recirculation
CN101234362A (en) * 2008-01-17 2008-08-06 杭州富兴环保机械有限公司 Polyester beverage bottle recycle liquid separation method and special-purpose equipment thereof
CN102223954A (en) * 2008-09-30 2011-10-19 加洛塑料公司 Process for the selective separation, and for the simultaneous increase in purity, of spent, fragmented, organic materials by means of aqueous media having chosen densities
CN201482588U (en) * 2009-08-06 2010-05-26 宁波大发化纤有限公司 Paper scraps separator of bottle flake raw materials
CN102574304A (en) * 2009-10-02 2012-07-11 日立造船株式会社 Method and facility for sorting and separating waste plastic
CN202277880U (en) * 2011-11-03 2012-06-20 宁波大发化纤有限公司 Device for wiping off aluminum sheets in PET bottle sheets using hydrometer method

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