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Automation in the Recycling Industry: Recycling of Plastic and Large Liquid Crystal Displays
Linköping University, Department of Management and Engineering, Manufacturing Engineering. Linköping University, The Institute of Technology.
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In a world of growing population and increasing prosperity, the demand for new high-technology products is increasing together with the demand for rawmaterials. To be able to deal with the demand for new raw materials and the increasing amount of waste, the recycling industry needs to prepare itself to cope with these changes. If the waste can become the new raw materials, then the recycling industry has a bright future. The implementation of new ways to recycle products can be the solution to succeeding in this challenge.

The objective of this research is to investigate, from a technical perspective, automation in the recycling industry. More specifically, the objective is to identify problems and solutions in the recycling of plastics and large liquid crystal displays in order to better cope with current recycling requirements.

This research was inspired by the research methodologies of industry-aslaboratory, action research, experimental research and two concept development methods.

The results related to the recycling of plastics come from a theoretical investigation of the possibilities for a plastic sorting facility. The investigation resulted in two concepts for recycling systems, implementable with today’s stateof-the-art technology and a more futuristic concept for sorting and separating the different plastics of interest. The systems are designed with standardised processes and are arranged in a flexible way to be able to manage with current industrial requirements.

The results related to large liquid crystal displays include a clarification of the requirements for an automatic recycling plant, concept generation, and practical testing of different technologies. Two preferred processes for dismantle large liquid crystal displays are the circle saw and band saw. Additional results are the semi-automatic process structure to manage with current industrial requirements for large liquid crystal displays.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2013. , 80 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1583
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-90503Local ID: LIU-TEK-LIC-2013:17ISBN: 978-91-7519-659-6 (print)OAI: oai:DiVA.org:liu-90503DiVA: diva2:613551
Presentation
2013-05-03, A30, A-huset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2013-03-28 Created: 2013-03-28 Last updated: 2016-09-26Bibliographically approved
List of papers
1. Automation of Plastic Recycling – A case study
Open this publication in new window or tab >>Automation of Plastic Recycling – A case study
2009 (English)In: Proceedings of EcoDesign 2009, Sapporo, Japan, Springer, 2009, 935-940 p.Conference paper, Published paper (Refereed)
Abstract [en]

Plastic recycling is an increasingly important issue intoday’s society. The number of plastics and theirvariation with additives has increased lately, affecting inturn the possibilities for plastic material recycling.However, trends in e.g. Japan show a reduction in thenumber of plastics used in e.g. household appliances.This reduction has been put into force in order to easeplastic recycling for those kinds of products.In Sweden, more efforts are put on collecting plasticfor material recycling. The intention for doing this is tohave more plastic material recycled rather thanincinerated and energy recovered. This paper deals witha conceptual investigation and development of anautomatic plastic recycling plant in Sweden. In order toreach a recycling plant that fulfills required technical andeconomic specifications, a large investigation of existingtechniques was performed. This investigation revealedmany techniques described in research, but also whichtechniques that were used by recycling industry today.The results of these studies became a conceptual andpotential well-functioning material recycling plant forplastics which is fully automatic. However, the focus ofthis development has been to sort out and materialrecycle the most common plastics, namely polyetene(LDPE and HDPE), polypropylene (PP), polyethylene(PET), polyvinyl chloride (PVC) and polystyrene (PS)whereas the other plastics have been sorted out forenergy recovery. Having these delimitations, a goodrecycling process plant can be achieved.

Place, publisher, year, edition, pages
Springer, 2009
Keyword
plastic, recycling, automation, Sweden, material recycling.
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:liu:diva-63006 (URN)978-4-88898-192-7 (ISBN)
Conference
6th International Symposium on Environmentally Conscious Design and Inverse Manufacturing, December 7-9, Sapporo, Japan
Available from: 2010-12-08 Created: 2010-12-08 Last updated: 2016-04-12
2. Requirements and needs of automatic material recycling of flat panel displays
Open this publication in new window or tab >>Requirements and needs of automatic material recycling of flat panel displays
2010 (English)In: Proceedings of Going Green CARE INNOVATION 2010, 8th International Symposium, November 8-11, Vienna, Austria, paper 107 on CD., 2010, 107-107 p.Conference paper, Published paper (Refereed)
Abstract [en]

The amount of flat panel displays in the World is increasing and the day whenthe displays will start to end up in the waste stream in great number is getting closer. Themost common flat panel display, the liquid crystal display, contains liquid crystals, indiumand mercury. The capacity of the recycling plants is not dimensioned according to theamount of displays that needs to be recycled in the near future. To increase the capacity ofthe recycling plants and achieve a better work environment there is a possibility to automatethe recycling process in a greater extends comparing with today. The requirements andneeds of the automated processes are to handle; all incoming material, e.g. liquid crystaldisplays, plasma display panel, organic light emitted diode, other types of displays andother electronic waste, identify and separate the different incoming materials, disassemblethe material and separate the components and materials of interest.

National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:liu:diva-63008 (URN)
Conference
Going Green CARE INNOVATION 2010, 8th International Symposium, November 8-11, Vienna, Austria
Projects
AutoDisAHÅPLA
Available from: 2010-12-08 Created: 2010-12-08 Last updated: 2016-04-12Bibliographically approved
3. Conceptual Process Development of Automatic Disassembly of Flat Panel Displays for Material Recycling
Open this publication in new window or tab >>Conceptual Process Development of Automatic Disassembly of Flat Panel Displays for Material Recycling
2011 (English)In: Proceedings from the International Conference on Remanufacturing 2011, Glasgow, UK, University of Strathclyde, 27 - 29 July 2011, 2011, 187-197 p.Conference paper, Published paper (Refereed)
Abstract [en]

Sales of television sets and computer monitors with flat panel displays have increased dramatically in recent years, and are expected to result in approximately 2.5 billion liquid crystal displays in Europe in the near future. A large investment will be required in Europe as well as globally to handle the large numbers of flat panel displays that are beginning to enter the waste stream today.Given the long-term effects of increased energy and raw material costs, as well as political directives to effect climate change and environmental pollution, it will be a necessity as well as a business opportunity to recycle both the raw materials and components from electronics waste. It is already an accepted truth that “today’s waste is tomorrow’s resources”.The research for this paper aims at exploring what process concepts there are for making an automatic recycling process of flat panel displays. The recycling process shall be both economical and practical to implement in the existing recycling industry.This paper is based on the requirements and needs facing Swedish electronic recycling companies due to the growing amount of electronic waste. This includes the material that will enter an automated flat panel display recycling facility, together with the material and components of interest.The conceptual process has been developed by conducting literature reviews and interviews with recycling companies, as well as by performing practical tests and financial calculations. The result of the evaluation of concepts shows that a circle-saw concept is most suitable, since it has high capacity and provides a good working environment in comparison to the other concepts studied.

Keyword
Automation, Material recycling, Disassembly, Conceptual process development
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:liu:diva-71725 (URN)09-4764-981-6 (ISBN)978-09-4764-982-1 (ISBN)
Conference
International Conference on Remanufacturing 2011, Glasgow, UK, University of Strathclyde, 27 - 29 July 2011
Projects
AutoDisA
Available from: 2011-11-02 Created: 2011-11-02 Last updated: 2016-04-12

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Elo, Kristofer

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