• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.9
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• pp.2313-2321
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• 2014

A concentration meter is widely used at purification plants, sewage treatment plants and waste water treatment plants to sort and transfer high concentration sludge and to control the amount of chemical input. This study has been prepared for improving efficiency of operation on sludge processes and to establish a basic for factory automation by accuracy improvement and problem solution of sludge concentration meter. The concentration meter's accuracy and stability is improved by applying multi-beam sensors and minimum deviation linear average filtering. Furthermore maintenance without cut-off of water in sludge operation is possible by detachable sensors. The performance of multi-beam concentration meter has been variously verified by the pilot plant experiment.

• The KSFM Journal of Fluid Machinery
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• v.11 no.6
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• pp.77-81
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• 2008

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.113-114
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• 2013

일반적인 소규모 휘발성유기화합물(VOCs:Volatile Organic Compounds) 배출시설인 주유소, 세탁소, 도장시설 등의 환경에서 대기로 배출되는 휘발유 유증기, 세탁용제(솔벤트유) 증기 등을 포집하여 포집된 유증기를 다시 액화처리 과정을 통하여 휘발유, 솔벤트로 재생산하는 기존의 PLC(Programable Logic Control) 방식의 처리과정을 ICT(Information Communication Technology)을 도입하여 보다 효율적이고 안정적인 스마트한 VOCs 액화장치 관리시스템을 개발하고자 한다. 현재 기존의 주유소 휘발유증기액화장치는 타이머와 릴레이 등을 조합하여 냉동 공조 장치로 동작하도록 하고 있다. 이는 단순한 전기제어로 동작하여 관리자가 항시 주의를 요하며 전력소비가 심해 생산량에 비해 손해가 발생하게 되며, 관리자가 원격지에서 생산량과 현 상황을 확인할 방법이 존재하지 않아 항상 관리자가 직접 수기로 기록하게 되어 많은 불편사항이 발생하였다. 본 논문에서 이러한 기존의 시스템을 대부분 유지하고 자동화와 원격 모니터링 시스템을 갖추고 블루투스(bluetooth) 모듈을 이용하여 원격에서 시스템을 관리할 수 있도록 개발하고자 한다.

• Resources Recycling
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• v.19 no.3
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• pp.24-32
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• 2010

In the present work, a new separation system with rotating rakes has been developed to separate the film-based plastics from the recyclable materials, and environment assessment is also carried out during operation of the device. Capacity of the device was about 5.3 ton/hr at a rakes rotation speed of 26.0 rpm (the number of rakes in the 1st, 2nd and 3rd trials were 39, 52 and 48, respectively) and a belt conveyor speed of 38.5m/min, which satisfied the initial design capacity (5.0 ton/hr). Recovery ratio and purity of the plastic films were 92.6% and 96.5%, respectively at a rotation speed of 28 rpm. The levels of noise, vibration and particulate emission were below material standard regulatory limits. Plastic refused fuel (RPF) was also prepared with the recovered films. The calorific value and chlorine content of the prepared RPF were 9,740 kcal/kg and 0.18%, respectively which satisfy the first grade quality specification of the Korean RPF standard. As a result of this work, recovery of energy resources from the municipal solid waste is possible by adopting the developed separation device.