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열병합 발전소에서 발생한 탈황석고의 재활용을 위한 특성분석
연익준,조병렬 忠州大學校 2004 한국교통대학교 논문집 Vol.39 No.2
This study is for the purpose of utilizing the FGD gypsum that is produced as a by-product by responding to the calcium carbonate that is injected to eliminate SO₂ from the wet flue gas desulfurization process of the combined heat and power plant. To analyze the chemical characteristics of the FGD gypsum, the chemical formation was examined through an analysis of pH, ICP, XRD and SEM. pH 6.5~6.8 shows as one of the characteristics of the FGD gypsum, as a surface analysis result of XRD, SEM, it shows in a form of calcium sulfate dihydrate
연익준 忠州大學校 2012 한국교통대학교 논문집 Vol.47 No.-
In this study, paper-log was manufactured using waste paper to investigate possibility of usage for fuel. To confirm the validity of usage for fuel, specification of manufactured paper-log for RDF(refused derived fuel) was examined and competitive price between paper-log and others was investigated. Also, quality of waste water generated from the process of manufactured paper-log was analyzed for estimating effects on environmental safety. From the results of specification test for RDF, the properties such as heat value and contents of chloride, Hg, Cd, Pb, As, water, ash and sulfur was satisfied with regulation levels of RDF. And the results of water quality generated from the process of manufactured paper-log showed a very low environmental impact. The possibility of usage for substitution of fossil fuels as an source of heating energy for camping and small scale heating seems to be sufficient.
연익준,박상찬 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-
Semi-dry reactor (S.D.R) system is used to evaluate the effect of spray characteristics for the removal of HCl in the flue gases, and in these experiment, the spray direction was co-current with flue gas and the two-fluid external mixing nozzle was used. And the HCl concentration of the treated flue gas was measured by the combustion gas analyzer (TMS system) on stack. In these experiment, we obtained the maximum removal efficiency of HCl in the incineration flue gas was 96% when atomization quantity of lime slurry was 600ℓ/hr and the Ca/Cl ratio was 3.36 and the slurry droplet size proved 24㎛. Also, the temperature of inlet flue gas into semi-dry reactor have to maintain over 300℃ since lower gas temperature can be caused condensing at the next bag filter.
바닥재와 하·폐수 슬러지를 첨가한 점토벽돌제조와 환경안정성 평가
연익준 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-
This study is to develop a recycling method for coal ash (bottom ash) and sludge as materials for fabricating clay bricks. In the experiment, the bottom ash used as supplementary material with clay and sewage sludge added as a blowing agent. Characteristics for manufactured clay brick depend on various conditions such as mixture ratio, calcination temperature and time. The results showed that the calcination temperature and time were enough to satisfy the Korean Standard of clay brick at 1150℃ and 1hr, respectively. The compressive strength and water absorption under 9:1 (clay : wethered granite) were 41.0 N/mm2 and 7.4%, which correspond with 1st grade brick standard. When sewage sludge added as blowing agent to fabricate light weight clay brick, the the value of compressive strength and water absorption were 11.12 N/mm2 and 14.5%, which is applicable to 3rd grade brick standard. The leaching test including KLT (Korea Leaching Test) and TCLP (Toxicity Characteristic Leaching Procedure) applied to assessment environmental risk caused by heavy metals. The results showed that concentration of leached heavy metals was lower than allowable level in KLT and TCLP.
사용 종료된 비위생 매립지의 시간 경과에 따른 매립가스의 분석에 의한 안정화 특성
연익준,전태성,조중식 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-
It is necessary to verify the stabilization of landfill gas and wastes for managing and utilizing a closed municipal solid waste landfill site. In this study, the landfill gas was collected and analyzed in site, and the landfilled waste was excavated to assess the environmental stabilization of depended time frame in the closed open dumping landfill. The physical analysis of the landfill showed that organic matters were composed of 0.89~29.13% in total after five years following the landfill closing, and 0.79~28.60% after eight years. Rapid-biodegradable organic matters completely decomposed in five years and slow-biodegradable organic matters did not yet. Inorganic matters were not large of difference of passed time and in the analysis of landfill gas, CH4 and CO2 gradually decreased with time. The assessment in this study, reveals that the landfill after appeared the maturation phase based on the analysis of LFG, and also provides the fundamental data for establishing the environmental plan and maintenance of the closed landfill.
화학적 활성화로 제조한 비산회 흡착제의 중금속 흡착 특성
연익준,박상찬 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2
This research was performed to investigate the utilization of fly ash as an adsorbent for effective disposal by recycling of fly ash generated from power plant. The adsorption characteristics of this adsorbent was also studied through the analysis of specific surface area, and removal of heavy mctal ions. The specific surface area of the adsorbent added to 10% Na_(2)SO_(4) at 800℃ was about 2.5~4.0 ㎡/g, which was 8~13 times higher than fly ash. The adsorption of activated charcoal and the manufactured adsorbent at 500 Pb^(2+) ㎎/L at pH 3 were 5.29 ㎎/g and 46.5 ㎎/g, respectively. The removal efficiency of the manufactured adsorbent was about 8.8 times as high as that of activated charcoal, but it was lower for Cu and Cd than activated charcoal.
산업단지 주변지역 주민의 악취인식이 주관적 악취강도에 미치는 영향 - 오창산업단지를 중심으로 -
연익준,정주용,박성식 한국냄새환경학회 2016 실내환경 및 냄새 학회지 Vol.15 No.2
This study has intended to analyze the impact of odor perception of residents, who currently live in Ochang industrial complex, on their subjective odor sensitiveness. In addition to the relationship between the perception and the sensitiveness, odor acceptance was considered as moderating variable in a research model. Korean governments has experienced even great and small civil complaints regarding bad smells throughout the country especially around the industrial complex. The residential areas are getting much closer to industrial complex due to major cities’ expansion. The closer cities are to industrial areas, the bigger the conflicts are growing due to the odor. According to the research results, it was proven that residents’ concerns on an bad image due to odor, their perception on an administrative agency’s responsibilities and economical values of their living places have a significant effect on the odor sensitiveness. Moreover, odor acceptance perceived by them has a negative moderating effect between odor perception and odor sensitiveness. Based on such results, implications and suggestions are included in the research to support the research objectives.