• Plant Journal
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• v.18 no.3
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• pp.52-61
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• 2022

This study tested the effect of de-NOx Facility operating condition on Nox emisiion in a 125 MW wood pellet power plant in Yeongdong Eco Power Plant Unit 1, which is in operation. As SNCR urea flow rate increased, NOx emission gradually decreased, but ammonia slip after SCR increased. The boiler under test has a structure that is unfavorable to SNCR operation due to the high internal temperature, and the optimum location of the nozzle will be required. SCR dilution air temperature change did not affect the amount of NOx generated. Increasing SCR ammonia flow reduced the NOx emission at SCR outlet and also increased the NOx removal efficiency. However, the ammonia flow rate of 111 kg/h, which does not exceed the ammonia slip its own reference limit, is estimated to be the maximum operating standard. The increase in SCR mixer pressure reduced NOx emission and the removal efficiency was also measured to be the most effective variable to inhibit NOx production.

• Plant Journal
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• v.9 no.3
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• pp.48-52
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• 2013

In this study, the internal flow field of SCR Denitrification Plant was simulated by using Computational Fluid Dynamics(CFD). In order to analyze the uniformity of flow field, an interpretation on the pre-existing facilities was performed, and some moot points were identified and compensated through this analysis. The compensatory methods include the installation of the Porous Plate below the bottom of the Baffle to create uniform flow and also, and the Guide Vane was also placed in the bend of pipe to guide the flow uniformly. Lastly, the Baffle was installed to deduct equalized space distribution of the air flow, initially flowed into the SCR Plant.

• 기계와재료
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• v.24 no.2
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• pp.18-26
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• 2012

지구 환경오염문제가 대두되면서 세계 각국에서는 환경오염을 최소화하려는 움직임이 활발히 이루어지고 있다. 국제해사기구(IMO)에서는 해양 대기오염의 상당량이 선박에서 배출되는 배기가스에 의한 것으로 판단하고 있으며, 이에 따라 선진국을 중심으로 선박관련 환경규제 및 선박 배기가스 배출기준을 점차적으로 강화해 가고 있고, 친환경 선박 및 기자재 개발을 적극적으로 진행하고 있다. 현재 선박에 적용 가능한 NOx 제거장치로는 ECR(Exhaust Gas Recirculation), SCR(Selective, Catalytic Reduction), SAM(Scavenge Air Moistening) 등이 개발되었으며, 연소온도 조절 및 촉매 환원반응 등을 이용하여 NOx를 제거하고 있다. 현재 개발된 탈질설비 중 현실적으로 가장 적합한 것은 SCR시스템으로 인식되고 있으나, 연료효율 감소로 인하여 가스연료를 이용하거나 새로운 연료개발 등 사용연료에 변화를 주는 방법들이 미래의 대안으로 제시되고 있다.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.12
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• pp.1087-1093
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• 2010

Autotrophic denitrification is known as an effective and economical alternative for heterotrophic denitrification using external carbon sources such as methanol. In this study, we evaluated design and operation parameters for a sulfur denitrification reactor (SDR) treating high strength nitrogen wastewater. The SDR was filled with spherical sulfur media in connected to a pilot-scale nutrient removal process (daily flow rate, $Q=18\;m^3/d$) using moving spongy media. Total nitrogen (TN) concentration of the final effluent was below the 7.0 mg TN/L because nitrate was additionally removed through autotrophic denitrificationin without adding alkalinity (initial alkalinity was $169.4{\pm}20.8\;mg$ $CaCO_3$/L). During the test period, 60~80% of nitrogen in the influent was removed even in low temperature (below $15^{\circ}C$). The alkalinity consumption for nitrate removal in SDR was $4.09{\pm}1.29$ g $CaCO_3/g$ ${NO_3}^-$-N, and the residual alkalinity of influent of SDR was higher than that of theoretical requirements for full conversion of nitrate. The consumption of sulfur was 943.8 g S/d and it was 2.4 times higher than theoretical value (400.1 g S/d) due to abrasion and loss of sulfur media in backwash, etc.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.258-259
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• 1999

각종 산업공정에서 발생되는 SO$_2$를 처리하기 위하여 화력발전소와 같은 대형 배출업소에서는 주로 FGD 공법이 사용되고, 중소형의 배출업소에서는 건식 또는 반건식 공법 등이 많이 사용되고 있다. 또한 NO$_{x}$의 제거는 SCR 또는 SNCR 공법을 사용하고 있다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.262-263
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• 1999

현재 저온 플라스마를 이용한 대기오염물질 제어 연구가 국내외적으로 활발하게 진행되고 있나. 특히 국내에서는 강화된 대기오염에 대한 배출허용기준을 준수하기 위하여 황산화물 및 질소산화물을 제거하기 위한 연구가 활발히 이루어지고 있으며, 이와 병행하여 휘발성 유기화합물(VOCs; Volatile Organic Compounds)에 대한 연구도 진행중에 있다.(중략)

• JOURNAL OF ELECTRICAL WORLD
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• s.451
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• pp.92-97
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• 2014

국내 최초의 대용량 석탄화력발전소인 삼천포화력본부(본부장 노선만)는 한국남동발전(주)의 핵심 발전소 중 하나이다. 1984년 1호기 준공이래 1998년 6호기 준공까지 약 15년에 걸쳐 총 여섯 호기가 준공되었고, 오늘날까지 30년에 걸쳐 양질의 전기를 생산해내고 있다. 특히 1,2호기는 이미 30년이상 운전하며 1980년대 이후 우리나라의 급격한 경제성장을 뒤에서 든든히 뒷받침한 효자 발전소라 아니할 수 없다. 그런데 사실 발전소가 오래됐다고 하면 환경적인 측면에서 부정적 인식이 발생할 수 있다. 하지만 삼천포화력본부는 1~6호기에 대한 환경설비(탈황 탈질)를 준공함으로써 이러한 우려도 불식시켰다. 여기에 최근에는 친환경 발전소로도 명성이 높다. 해양소수력, 태양광 등 신재생발전설비들을 차례로 준공, 운영하면서 기존 석탄화력발전소의 차세대 운영 모델을 제시하고 있는 것이다. 석탄화력발전소의 바로미터로 떠오른 삼천포화력본부를 소개한다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.487-488
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• 2003

우리나라 대기환경기준이 점차 강화되고 있고, 국민의 욕구수준 또한 선진국 수준으로 강화될 계획으로 있어 이에 따른 대기오염 방지시설의 설치 또는 보완이 요구되고 있다 특히, 배기가스 중 황산화물 및 질소산화물 배출농도 강화로 울산화력발전소에서는 최신의 배연탈황ㆍ탈질설비를 가동중에 있으나 황산 Mist가 주요원인으로 추정되는 Plume Opacity가 발생되어 오염물질 배출농도는 법적규제기준 이내로 배출되더라도 민원이 발생되고 있다. 이에 대한 대책으로 현장에 적합한 연료첨가제 주입으로 Plume Opacity 발생원인을 제거함과 동시에 배연탈황설비에서 발생된 저온부식 현상을 개선하고, 보일러 내 고온부식 등 연소장애 현상 개선을 통한 열효율 향상 방안에 대해 연구하였다. (중략)

• Resources Recycling
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• v.22 no.2
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• pp.53-61
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• 2013

Since the 2000s, to start inducement of SCR(Selective Catalytic Reduction) denitrification facility by large scale companies which are emitted large amount of nitrogen oxides such as power plants, combined heat and power plant, incinerators and chemical plants due to take effect the regulation of stationary sources of nitrogen oxide(NOx), and the total amount of discharged pollutants, such as regulatory gradually emissions regulations are being strengthened and the expanded coverage due to the use of SCR denitrification catalyst is a growing trend. Since 2010 due to the new catalysts to replace the already installed power plants and incinerators due to inactive, and catalytic denitrification SCR waste catalyst waste as a resource rather than the development of technologies for recycling situation is urgently needed. In this study, analyzed paper and patent for recycling technologies of waste catalyst. The range of search was limited in the open patents of USA (US), European Union (EP), Japan (JP), Korea (KR) and SCI journals from 1975 to 2012. Patents and journals were collected using key-words searching and filtered by filtering criteria. The trends of the patents and journals was analyzed by the years, countries, companies, and technologies.

• Journal of Advanced Marine Engineering and Technology
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• v.23 no.4
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• pp.462-472
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• 1999

De-NOx facility using Selective Catalytic Reduction method is the most widely applied one that removes NOx from flue gas emitted from combustion facility such as boiler for power generation engine incinerator etc. Reductant $NH_3\;or\;NH_4OH$ is sprayed into flue gas to convert NOx into $H_2O$ and $N_2.$ Good mixing between flue gas and $NH_3$ is the most important factor to increase reduction in catalytic layer and to reduce unreacted NH3 slip. Therefore the development of mixer device for mixing effect is one of the important part for SCR facility. Objectives of this study are to investigate the relation between flow and concentration field by observation at the wake of delta-wing type mixer. At the first stage qualitative measurement of flow field is conducted by flow visualization using laser light sheet in lab. scale wind tunnel. Also we have conducted the quantitative analysis by comparing flow field measurement using LDV with numerical simulation. On the basis of qualitative and quantitative analysis we investigate the dis-tribution of flow and concentration in flow model facility. The results of an experimental and compu-tational examination of the vortex structures shed from delta wing type vortex generator having $40^{\circ}$ angle of attack are presented, The effects of vortex structure on the gas mixing is discussed, too.