• Journal of Energy Engineering
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• v.11 no.3
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• pp.224-229
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• 2002

During the operation of Circulating Fluidized Bed Combustion Boiler, defluidization is mainly caused by the formation of clinker. The clinker is made of components of Si, Fe, Ca, etc. However, although the defluidization is widely researched, the major factor has not been validated yet clearly. In this study, in the view of the shape and the arrangement of nozzles at a distributor (type 1, type 2), the formation of clinker is examined by CFD calculations and an improved nozzle design is proposed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.2
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• pp.319-325
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• 2018

Pot-holes are steadily increasing due to abnormal climate such as heavy rainfall and frequent snowfall. Pot-hole related to traffic accidents cause injuries, car damage and distress of road facilities. To reduce pot-holes, the use of an anti-stripping agent is mandatorily recommended to asphalt concrete mixture. Hydrated lime is commonly used as anti-stripping agent due to the convenience and economics. Byproduct ash from circulating fluidized bed boiler was reviewed as an anti stripping agent. According to the test results, the byproduct ash is satisfied with TSR specification using 1% to 3% by weight of the asphalt mixture. The byproduct ash was examined under various condition changes of aggregate and asphalt concrete mixture considering quality movement. According to the results, using the byproduct ash was measured average 0.87 of TSR and coverage rates of 60% after rolling bottle test. Test results also revealed that the byproduct ash showed stable performance. Using the byproduct ash to decrease pot-hole in asphalt concrete pavement is suitable for demonstrating stable performance as anti-stripping agent.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.207.1-207.1
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• 2010

The emission difference of SOx, NOx, TSP and dioxine was investigated in commercial CFB boiler, when coal and three kinds of RDFs were co-combusted respectively. The each mixing ratio was 7.5% RPF, 7.5% RDF and 10% SDF with coal. Emitting dioxine concentration was proportioned to the chlorine content of RDF. No trouble was found on normal boiler operation during co-combustion. These RPF, SDF and RDF could be determined to be a good alternative fuel of general coal.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.11a
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• pp.225-226
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• 2017

Recently, there has been a growing interest in the development of non-sintered binder to reduce CO2 emissions from the cement clinker manufacturing process and a number of studies have been conducted on fly ashes as an industrial by-product. However, in order to utilize fly ashes as a non-sintered binder, it is necessary to solve problems such as safety issues and economical efficiency due to use of an alkali activator. This study evaluates the material properties and compressive strength characteristics of three types of circulating fluidized bed boiler ashes. As a result, it was confirmed that the characteristics of each binder vary depending on the location of the power plant and the types of raw materials. In addition, it has been confirmed that the fluidized bed boiler ash shows a high compressive strength and can be used sufficiently as an non-sintered binder.

• Journal of Energy Engineering
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• v.6 no.1
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• pp.1-10
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• 1997

에너지 절약과 환경오염 감소가 절실히 요청되는 것과 관련하여 최근에 석탄 신에너지 기술개발이 활발히 진행되고 있으며, 고압유동층연소 복합발전(PFBC)은 상용화에 근접하여 개발되고 있다. 석탄의 고압 유동층연소는 기존의 PC보일러보다는 저온 연소로써 NO$_{x}$의 발생이 억제되며 탈황제를 동시에 주입하여 SO$_{x}$ 발생을 줄일 수 있는 것이 큰 잇점이다.

• 한국연소학회:학술대회논문집
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• 2014.11a
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• pp.55-57
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• 2014

• Magazine of RCR
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• v.9 no.3
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• pp.8-12
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• 2014

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2003.11a
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• pp.181-186
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• 2003

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2001.11a
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• pp.303-310
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• 2001

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2004.05a
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• pp.287-292
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• 2004