• Journal of Korean Electronics
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• v.13 no.5
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• pp.10-13
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• 1993

• Journal of Korean Electronics
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• v.13 no.5
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• pp.2-9
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• 1993

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.11a
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• pp.287-290
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• 2002

경제와 전력사용이 호전됨에 따라 냉장기술의 개발이 크게 촉진되면서 진공단열 기술개발을 통한 단열효과 등으로 가전제품의 기술이 세계수준에 도달하였고, 지속적인 기술의 발달로 사용량이 증가하고 있다. 이런 가전제품의 사용증가는 필연적으로 수명이 다한 폐가전 제품이 발생하게되고, 이들을 방치함으로서 환경오염을 일으키게 되었고 정부는 폐가전 제품을 재활용하고 폐기물을 최소화하는 방법을 기업에 요구함과 동시에 폐기물관리법과 자원의 절약과 재활용 촉진에 관한 법률을 제정 공포하게 되었다.(중략)

• Product Safety
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• s.80
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• pp.51-55
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• 2000

• Journal of Korean Electronics
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• v.17 no.10
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• pp.72-79
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• 1997

• Resources Recycling
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• v.13 no.1
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• pp.39-46
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• 2004

Triboelectrostatic separation process is a technology that different particles charged after contact and rubbing different materials are separated in a high electric field. This technology has an advantage in that it can be used for separating non-conducting materials such as plastics unlike other electrostatic separation processes. There are two objectives in this study. One is to develop an effective continuous tribo-electrostatic separation process. The other is to apply the developed device for the separation of mixed plastics. Results show that almost all tested plastics reaches over 95% in yield and grade after separation.

• Journal of Korea Multimedia Society
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• v.24 no.12
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• pp.1653-1662
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• 2021

In this paper, we propose a small waste appliance collection system that can be used for efficient waste appliance collection, and implement an unmanned automatic small waste appliance collector system. First, we collected cases related to the collection of waste home appliances, compared and analyzed methods, and arranged the characteristics. We analyzed at the requirements for the collection and management system of waste appliances by dividing it into the aspect of the discharger and the recycling business company. The collection system consists of a client-server structure, which is a collector system and a collection management server. The unmanned automatic collector system is divided into a control unit and a machine/mechanical unit. We identified the functions that the collector system must perform and the hardware required to perform these functions. Based on this, the collector system was implemented as an embedded system. The hardware and software used in the implementation are described and the implementation results are described. The collection system developed in this paper will contribute to the development of urban mining industry by enabling the efficient collection of waste appliances.

• Resources Recycling
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• v.26 no.1
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• pp.69-77
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• 2017

Used small household appliances(small e-waste) consists of a variety of complex materials and components. The small e-waste is mainly composed of plastics and an important potential source of waste plastic. The black plastics, particularly are very difficult to separate by resin type and therefore these are mainly recycled in the form of a mixtures. In the present study, the sorting technologies such as gravity and electro static separation, near-infrared ray(NIR) and IR/Raman optical sorting separation on mixture of black plastics were analyzed and their limitations on sorting process were also investigated. The Laser Induced Breakdown Spectroscopy(LIBS) spectrum of each black plastics was used for identification of black plastics by resin type, and after analyzing the normalization operation, Principal Component Analysis(PCA) was carried out. The spectrum data was optimized through PCA process. In order to improve the identification accuracy and sorting efficiency of black plastics, it is necessary to design a classifier with high efficiency and to improve the performance and reliability of the classifier by applying the field of intelligent algorithms.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2002.11a
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• pp.141-146
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• 2002

폐가스-공기 열교환 방식의 열교환기는 각종 산업용 요ㆍ로나 보일러 등에서 배출되는 폐열을 예열공기로 회수하여 연소용공기로 사용하는 에너지 절약방법으로 현재와 같이 고유가가 지속되고, 전 세계적인 공업화에 의한 고도성장과 생활수준의 향상에 따른 에너지 수요 증가, 에너지자원의 매장량의 한계 및 지역적 편중, 산유국이 밀집되어 있는 중동지역의 불투명한 정세를 미루어 볼 매 석유수급, 고유가의 불안요인은 더욱 증가할 것으로 추정된다.(중략)

• Applied Chemistry for Engineering
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• v.8 no.5
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• pp.790-795
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• 1997

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofuransfurans are the archetype of toxic chemicals. So it has absorbed public attention. The majors primary sources of PCDDS and PCDFs are chemical, thermal and photochemical reactions. Municipal solid waste incinerator facilities has been reported as the major contributors of dioxins to the environment. In this paper, Dioxins and furans were examined emission gas and fly ash produced during combustion in municipal solid waste incinerator. More effective method for sampling, extraction was described. The sample was extracted using a soxhlet method and purified using silicagel, alumina and carbon fibre HPLC to remove interfering compound. The extract was then analyzed by HRGC/HRMS. The result of this study showed recovery standard was good and the data resembled those of thermal processes. Total dioxins and furans were $1076.20pg/Nm^3$ and $1452.34pg/Nm^3$ respectively. The amount of highly chlorinated compound was more than that of lowly chlorinated compound. The 2,3,7,8-substituted TCDD was Just 0.34% of the total dioxins/furans amount.