EP1031542A2 - Method and plant for environmental handling of sealed insulating glass units - Google Patents

Method and plant for environmental handling of sealed insulating glass units Download PDF

Info

Publication number
EP1031542A2
EP1031542A2 EP00103852A EP00103852A EP1031542A2 EP 1031542 A2 EP1031542 A2 EP 1031542A2 EP 00103852 A EP00103852 A EP 00103852A EP 00103852 A EP00103852 A EP 00103852A EP 1031542 A2 EP1031542 A2 EP 1031542A2
Authority
EP
European Patent Office
Prior art keywords
glass
sealed insulating
insulating glass
bulk
environmental
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.)
Granted
Application number
EP00103852A
Other languages
German (de)
French (fr)
Other versions
EP1031542A3 (en
EP1031542B1 (en
Inventor
Helge Haugen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1031542A2 publication Critical patent/EP1031542A2/en
Publication of EP1031542A3 publication Critical patent/EP1031542A3/en
Application granted granted Critical
Publication of EP1031542B1 publication Critical patent/EP1031542B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the present invention relates to a method for environmental handling of sealed insulating glass units.
  • Sealed insulating glass units comprises two or more layers of glass which are held at a distance from each other by a spacer, usually an aluminium list, placed alongside the edges of the glass unit.
  • the spacer is glued to the glass and the joint between the glasses is sealed with glue or joint filler.
  • PCB (polychlorinated biphenyl) is a synthetic chlorinated organic compound having inter alia the following characteristics:
  • PCB was used in a number of appliances in industry like power condensators, building products, electronics, refrigerating systems (e.g. refrigerators), lighting fixtures, etc.
  • PCB is degraded very slowly and has harmful effects in the nature.
  • PCB is fat-soluble and is concentrated in the food chain.
  • PCB leads to health changes in humans and in animals. It weakens the immune system, increases the number of abortions and stillbirths, and lowers the stock of several animal species etc.
  • PCB was abandoned by a regulation from the Norwegian Ministry of the Environment of November 16, 1979 and the ban came into force in 1980 and from this time on PCB-containing waste was to be delivered to special category waste plants.
  • sealed insulating glass unit has to be collected and stored until good methods and installations for handling of PCB containing sealed insulating glass units plus production lines for carrying out the process, has been developed and established. It is urgent to find good solutions for environmental correct handling of sealed insulating glass units.
  • the PCB containing material is concentrated in a narrow stripe along the edge of the sealed insulating glass unit together with the aluminium list.
  • Used glass is a valuable resource. Even if the use of he environmental hazardous PCB containing glue for the production of sealed insulating glass units was abandoned from about 1980, the glue or joint filler so far has been the main obstacle against recycling flat glass at a cost effective price. It is therefore desirable to develop a method for cost-effective recycling of used flat glass by removing the unwanted material in the edge zone of the flat glass effectively and at a fair price.
  • the object of the present invention is to obtain a method for fractionating a sealed insulating glass unit into a fraction of environmental hazardous waste, like glue and spacer, and a fraction of clean glass, so that the different fractions may be deposited, destructed or recycled and where the method does not lead to problems for the working environment or outdoor environment, waste disposal or the like.
  • This object has been met by a method for environmental handling of a sealed insulating glass unit comprising two or more layers of glass glued and jointed with an undesirable material, like environmental or health damaging, e.g. PCB containing, material, where the bulk of the glass is separated from the undesirable material so that the glass may be sent for reuse or recirculation and the unwanted material may be sent for disposal, recovery or destruction, wherein the bulk of the glass is separated from a strip comprising glass and the unwanted material by cutting the glass principally perpendicular to the glass surface by means of high pressure jet water flow at a distance from the edge of the glass.
  • an undesirable material like environmental or health damaging, e.g. PCB containing, material
  • high pressure jet water flow also includes the use of sand added to the water to increase the cutting power of the high pressure water jet.
  • Another object has been to obtain a plant for carrying out the inventive method.
  • This object has been met by a plant for environmental handling of sealed insulating glass units comprising two or more layers of glass held at a distance from each other by a spacer and glued and jointed with an undesirable material, the plant comprising a high pressure jet water flow cutting device and a conveying system for bringing sealed insulating glass units into the cutting device.
  • the cutting device is set to cut the glass principally perpendicular to the glass surface at a given distance from the edge of the sealed insulating glass unit.
  • the invention also includes a use of high pressure jet water flow to separate a stripe including glass and material that has to be handled as special waste, from the bulk glass of a sealed insulating glass unit, where the stripe is separated from the bulk glass so that the bulk glass may be reused or recirculated and the material to be handled as special waste, may be sent for disposal, recovery of materials, or destruction.
  • the sealed insulating glass unit is first liberated from frame and case. If the health and environmental hazardous material pollute this wooden material, it has to be deposited in an approved special land fill or be burned in an approved plant for burning of material of this kind.
  • the liberation from frame and case is often done at the place from where the window glass is removed from and is therefor irrelevant to the present invention.
  • the sealed insulating glass units that have been liberated from frame and case are then brought to a plant for carrying out the present method.
  • the sealed insulating glass units are preferably transported substantially vertically into the plant. Inside the plant, the glass unit is tilted form the vertical position to a horizontal position and transferred to a low friction working table where the glass unit is freely movable.
  • the low friction at the working table may be achieved i.a by means of an air cushion, rollers or the like.
  • the sealed insulating glass unit is moved at the working table to get in the correct position relatively to nozzle of the high pressure jet water cutting device high-pressure jet water cutting device of a known type.
  • the high-pressure water jet nozzle travels in a linear track above the glass.
  • a plant of this kind may include more than one high-pressure water jet nozzle cutting along the other edges of the same sealed insulating glass unit to improve the capacity of the plant.
  • the high-pressure jet water cutting device is adjusted to cut transverse the glass surface right on the inside of the spacer or aluminium list. It is important that the water jet is not cutting into the glue or joint filler, as this may cause that some PCB or other environmental or health damaging compounds included in the glue or joint filler is released into the air or water.
  • the cut away stripe comprising glass, spacer and the unwanted material is removed.
  • the high pressure jet water cutting device is giving an even and straight cut so that the bulk glass that is liberated from the unwanted material may be used for to production of new window panes.
  • the cut away material is removed for a possible recovery of material, depositing or destruction according to to requirements of the law or regulations.
  • broken sealed insulating glass units may also be handled according to this method. However, if the glass unit is heavily deformed, even more glass must be removed together with the spacer, glue and joint filler. Handling of broken glass units normally requires more manual work than the handling of unbroken glass units.
  • the water used for cutting may include glue and aluminium besides in addition to glass. To avoid environmental harmful effluents, it is necessary to recirculate the water used for cutting.
  • the plant therefor has to include a purge system for the water.
  • the glue or joint filler includes health or environmental hazardous substances that might escape into the air, the plant has to be designed with a suction point and a filter preventing these substances to escape.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Processing Of Solid Wastes (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

A method for environmental handling of a sealed insulating glass unit comprising two or more layers of glass glued and jointed with an undesirable material, like environmental or health damaging, e.g. PCB containing, material, where the bulk of the glass is separated from the undesirable material so that the glass may be sent for reuse or recirculation and the unwanted material may be sent for disposal, recovery or destruction, wherein the bulk of the glass is separated from a strip comprising glass and the unwanted material by cutting the glass principally perpendicular to the glass surface by means of high pressure jet water flow at a distance from the edge of the glass, is described.
A plant for carrying out the method and the use of high-pressure jet water flow for environmental handling of sealed insulating glass units is also described.

Description

  • The present invention relates to a method for environmental handling of sealed insulating glass units.
  • Sealed insulating glass units comprises two or more layers of glass which are held at a distance from each other by a spacer, usually an aluminium list, placed alongside the edges of the glass unit. The spacer is glued to the glass and the joint between the glasses is sealed with glue or joint filler.
  • From about 1965 until about 1975 PCB was used as plastiziser in glue and joint fillers used in production of sealed insulating glass units in Norway and in other countries. Additionally sealed insulating glass units containing PCB was imported most probably until 1980. It is estimated that about 360 tons of PCB was imported to Norway for this purpose.
  • PCB (polychlorinated biphenyl) is a synthetic chlorinated organic compound having inter alia the following characteristics:
    • good insulating properties
    • good chemical and thermal stability
    • low corrosivity
    • good lubricating properties
    • low vapour pressure
    • low inflammability
  • Due to these properties PCB was used in a number of appliances in industry like power condensators, building products, electronics, refrigerating systems (e.g. refrigerators), lighting fixtures, etc.
  • PCB is degraded very slowly and has harmful effects in the nature. PCB is fat-soluble and is concentrated in the food chain. PCB leads to health changes in humans and in animals. It weakens the immune system, increases the number of abortions and stillbirths, and lowers the stock of several animal species etc.
  • PCB was abandoned by a regulation from the Norwegian Ministry of the Environment of November 16, 1979 and the ban came into force in 1980 and from this time on PCB-containing waste was to be delivered to special category waste plants.
  • Today there is no way to handle PCB-containing sealed insulating glass unit effectively and environmentally correct.
  • It is estimated that there is about 200 tons pure PCB in sealed insulating glass units in Norway. The goal is that this is handled in an environmental correct way and avoids that it dumped at dumpsites. It is estimated mean times before replacement for sealed insulating glass units are about 25 to 30 years. As the peak of production was in 1974 - 1975, the maximum quantities of PCB containing sealed insulating glass unit are bound to be end in land fillings now. The amount might be as high as 40 tons pure PCB in the peak year for replacement.
  • For the time being, sealed insulating glass unit has to be collected and stored until good methods and installations for handling of PCB containing sealed insulating glass units plus production lines for carrying out the process, has been developed and established. It is urgent to find good solutions for environmental correct handling of sealed insulating glass units.
  • The PCB containing material is concentrated in a narrow stripe along the edge of the sealed insulating glass unit together with the aluminium list.
  • Used glass is a valuable resource. Even if the use of he environmental hazardous PCB containing glue for the production of sealed insulating glass units was abandoned from about 1980, the glue or joint filler so far has been the main obstacle against recycling flat glass at a cost effective price. It is therefore desirable to develop a method for cost-effective recycling of used flat glass by removing the unwanted material in the edge zone of the flat glass effectively and at a fair price.
  • Due to the costs connected with collecting and handling, it is today not feasible to recycle the glass in sealed insulating glass units to reuse the glass. If PCB containing material has been used to glue or seal the sealed insulating glass units, it is necessary to separate the glass from this environmental hazardous material to or joint filler has been used to handle this waste in a safe and effective way.
  • One method used today to separate glass and PCB containing material, is to cut loose the aluminium list together with the glue from the glass with a sharp knife. This is a labour intensive process and all PCB containing material is not removed from the glass. To remove all PCB containing material, to outer rim of glass has to be cut away by means of a glass cutter, which results in an increase in the amount of waste and results in considerable manual work. This method will also cause PCB spills to air in form of particles and gas.
  • The object of the present invention is to obtain a method for fractionating a sealed insulating glass unit into a fraction of environmental hazardous waste, like glue and spacer, and a fraction of clean glass, so that the different fractions may be deposited, destructed or recycled and where the method does not lead to problems for the working environment or outdoor environment, waste disposal or the like.
  • This object has been met by a method for environmental handling of a sealed insulating glass unit comprising two or more layers of glass glued and jointed with an undesirable material, like environmental or health damaging, e.g. PCB containing, material, where the bulk of the glass is separated from the undesirable material so that the glass may be sent for reuse or recirculation and the unwanted material may be sent for disposal, recovery or destruction, wherein the bulk of the glass is separated from a strip comprising glass and the unwanted material by cutting the glass principally perpendicular to the glass surface by means of high pressure jet water flow at a distance from the edge of the glass.
  • The phrase "high pressure jet water flow" as used in this description and claims, also includes the use of sand added to the water to increase the cutting power of the high pressure water jet.
  • Another object has been to obtain a plant for carrying out the inventive method.
  • This object has been met by a plant for environmental handling of sealed insulating glass units comprising two or more layers of glass held at a distance from each other by a spacer and glued and jointed with an undesirable material, the plant comprising a high pressure jet water flow cutting device and a conveying system for bringing sealed insulating glass units into the cutting device.
  • Preferably the cutting device is set to cut the glass principally perpendicular to the glass surface at a given distance from the edge of the sealed insulating glass unit.
  • The invention also includes a use of high pressure jet water flow to separate a stripe including glass and material that has to be handled as special waste, from the bulk glass of a sealed insulating glass unit, where the stripe is separated from the bulk glass so that the bulk glass may be reused or recirculated and the material to be handled as special waste, may be sent for disposal, recovery of materials, or destruction.
  • The sealed insulating glass unit is first liberated from frame and case. If the health and environmental hazardous material pollute this wooden material, it has to be deposited in an approved special land fill or be burned in an approved plant for burning of material of this kind. The liberation from frame and case is often done at the place from where the window glass is removed from and is therefor irrelevant to the present invention.
  • The sealed insulating glass units that have been liberated from frame and case are then brought to a plant for carrying out the present method. The sealed insulating glass units are preferably transported substantially vertically into the plant. Inside the plant, the glass unit is tilted form the vertical position to a horizontal position and transferred to a low friction working table where the glass unit is freely movable. The low friction at the working table may be achieved i.a by means of an air cushion, rollers or the like.
  • The sealed insulating glass unit is moved at the working table to get in the correct position relatively to nozzle of the high pressure jet water cutting device high-pressure jet water cutting device of a known type. Preferably the high-pressure water jet nozzle travels in a linear track above the glass. A plant of this kind may include more than one high-pressure water jet nozzle cutting along the other edges of the same sealed insulating glass unit to improve the capacity of the plant.
  • The high-pressure jet water cutting device is adjusted to cut transverse the glass surface right on the inside of the spacer or aluminium list. It is important that the water jet is not cutting into the glue or joint filler, as this may cause that some PCB or other environmental or health damaging compounds included in the glue or joint filler is released into the air or water.
  • After cutting along all the sides of the sealed insulating glass unit, the cut away stripe comprising glass, spacer and the unwanted material is removed. The high pressure jet water cutting device is giving an even and straight cut so that the bulk glass that is liberated from the unwanted material may be used for to production of new window panes. The cut away material is removed for a possible recovery of material, depositing or destruction according to to requirements of the law or regulations.
  • Broken sealed insulating glass units may also be handled according to this method. However, if the glass unit is heavily deformed, even more glass must be removed together with the spacer, glue and joint filler. Handling of broken glass units normally requires more manual work than the handling of unbroken glass units.
  • The water used for cutting may include glue and aluminium besides in addition to glass. To avoid environmental harmful effluents, it is necessary to recirculate the water used for cutting. The plant therefor has to include a purge system for the water.
  • If the glue or joint filler includes health or environmental hazardous substances that might escape into the air, the plant has to be designed with a suction point and a filter preventing these substances to escape.

Claims (4)

  1. Method for environmental handling of a sealed insulating glass unit comprising two or more layers of glass glued and jointed with an undesirable material, like environmental or health damaging, e.g. PCB containing, material, where the bulk of the glass is separated from the undesirable material so that the glass may be sent for reuse or recirculation and the unwanted material may be sent for disposal, recovery or destruction, characterised in that the bulk of the glass is separated from a strip comprising glass and the unwanted material by cutting the glass principally perpendicular to the glass surface by means of high pressure jet water flow at a distance from the edge of the glass.
  2. Plant for environmental handling of sealed insulating glass units comprising two or more layers of glass held at a distance from each other by a spacer and glued and jointed with an undesirable material, characterised in that the plant comprises a high pressure jet water flow cutting device and a conveying system for bringing sealed insulating glass units into the cutting device.
  3. Plant according to claim 2, characterised in that the cutting device is set to cut the glass principally perpendicular to the glass surface at a given distance from the edge of the sealed insulating glass unit.
  4. Use of high pressure jet water flow to separate a stripe including glass and material that has to be handled as special waste, from the bulk glass of a sealed insulating glass unit, where the stripe is separated from the bulk glass so that the bulk glass may be reused or recirculated and the material to be handled as special waste, may be sent for disposal, recovery of materials, or destruction.
EP00103852A 1999-02-25 2000-02-24 Plant for separating bulk of glass from an insulating glass unit Expired - Lifetime EP1031542B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO19990904 1999-02-25
NO19990904A NO314033B1 (en) 1999-02-25 1999-02-25 Method and apparatus for environmental cleaning of insulating glass panes and use of water scraps
NO900499 1999-02-25

Publications (3)

Publication Number Publication Date
EP1031542A2 true EP1031542A2 (en) 2000-08-30
EP1031542A3 EP1031542A3 (en) 2001-03-28
EP1031542B1 EP1031542B1 (en) 2005-12-07

Family

ID=19903006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103852A Expired - Lifetime EP1031542B1 (en) 1999-02-25 2000-02-24 Plant for separating bulk of glass from an insulating glass unit

Country Status (4)

Country Link
EP (1) EP1031542B1 (en)
AT (1) ATE312060T1 (en)
DE (1) DE60028432T2 (en)
NO (1) NO314033B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109485246A (en) * 2018-10-23 2019-03-19 意力(广州)电子科技有限公司 A kind of numerical control processing technology of small-size glass
DE102022209846A1 (en) 2022-09-19 2024-03-21 Hegla Gmbh & Co. Kg Separating method and separating device for separating glass panes of insulating glazing from the spacer frame, method and device for dismantling insulating glazing and processing method and processing device for processing insulating glazing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1252711A (en) * 1984-09-27 1989-04-18 Richard A. Herrington Ultra-high pressure abrasive jet cutting of glass
IT1222060B (en) * 1987-07-17 1990-08-31 Vetreria Lorenzo Snc Di Giorgi AUTOMATIC EQUIPMENT PARTICULARLY DESIGNED FOR CUTTING SINGLE AND DOUBLE GLASS SHEETS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109485246A (en) * 2018-10-23 2019-03-19 意力(广州)电子科技有限公司 A kind of numerical control processing technology of small-size glass
DE102022209846A1 (en) 2022-09-19 2024-03-21 Hegla Gmbh & Co. Kg Separating method and separating device for separating glass panes of insulating glazing from the spacer frame, method and device for dismantling insulating glazing and processing method and processing device for processing insulating glazing
WO2024061895A1 (en) 2022-09-19 2024-03-28 Hegla Gmbh & Co. Kg Removal method and removal device for removing glass panes of an insulating glazing unit from the spacer frame, method and device for taking an insulating glazing unit apart and processing method and processing device for processing insulating glazing units
DE202023002732U1 (en) 2022-09-19 2024-04-08 Hegla Gmbh & Co. Kg Separating device for separating glass panes of an insulating glazing from the spacer frame and processing device for processing insulating glazing

Also Published As

Publication number Publication date
ATE312060T1 (en) 2005-12-15
DE60028432T2 (en) 2006-09-28
NO990904D0 (en) 1999-02-25
NO990904L (en) 2000-08-26
NO314033B1 (en) 2003-01-20
EP1031542A3 (en) 2001-03-28
EP1031542B1 (en) 2005-12-07
DE60028432D1 (en) 2006-07-20

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