• 대한환경공학회지
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• 제35권2호
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• pp.115-123
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• 2013

도시폐기물 소각로는 일반적으로 전처리 설비가 필요 없고 대용량에 적합한 스토커타입의 소각로를 많이 사용하고 있다. 그러나 음식물 쓰레기의 직매립 금지 등에 따라 반입폐기물의 가연분이 증가하고 수분함량이 감소되어 폐기물의 발열량이 소각로 설치 초기에 비해 매우 증가하고 있는 실정이다. 이에 소각로 열부하의 증가에 따라 소각량 감소와 가동률 저하 등 소각로 운영에 어려움을 겪고 있다. 본 연구는 D시의 소각로를 대상으로 하여 소각량과 함습공기 양등 중요 변수에 따른 NO 모델을 포함한 난류반응 유동에 대한 일련의 전산해석을 수행하여 기초 자료를 축적하고 그것을 바탕으로 최근 도시 폐기물의 고 발열량화에 따른 문제점 및 해결방안에 대한 연구를 수행하였다. 이에 따라 운전조건 등을 최적화하여 기존의 운전시설의 활용을 극대화 하고자 하였다. 폐기물의 소각량을 저감하지 않고 고발열량화의 문제를 해결할 수 있는 실질적인 방법으로 연소용 공기에 수분의 양을 10%와 20%로 증가시키며 가습공기를 주입하는 방안을 검토하였다. 그 결과 연소공기의 비열증가와 상변화 등에 의하여 최대 화염온도의 감소가 발생하여 전반적인 소각로 내부의 온도가 낮아지는 것으로 나타났으며 그에 따라 NOx 발생량이 실질적으로 감소되는 것으로 나타났다. 특히 가습공기 20%주입시 기존에 설치되어 있는 SNCR 설비의 환원제 주입구 위치가 대부분 SNCR 반응에 적합한 온도 영역으로 나타나서 현재 고발열량 문제로 전혀 가동하지 못하고 있는 SNCR 설비의 재가동을 고려해 볼 수 있을 것으로 판단된다.

• Journal of Electrical Engineering and Technology
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• 제9권1호
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• pp.239-246
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• 2014

Incineration is conceptually sound as a waste treatment technology. There is, however, concern over its emissions when it is improperly designed and operated. An electrostatic precipitator is one of the most commonly used devices to control particulate emissions from boilers, incinerators and some other industrial processes. In this work, a modular electrostatic precipitator with sizing of $1m{\times}1m{\times}1m$ was developed for removal of particulate matter from the exhaust gases of a small waste incinerator. Its design was based on a simple wire-and-plate concept. The corona discharge wires were connected to a positive high-voltage pulse generator, while the collection plates were grounded. The high-voltage pulse generator was used to produce the corona discharge field between the individual discharge wire and the collection plate. The particulate-laden exhaust gas flow was directed across the corona discharge field. The charged particles were deflected outward and collected on the plate. The collection efficiency was evaluated as a mass loading ratio between the difference at the inlet and the outlet to the particulate loading at the inlet of the precipitator. The collection efficiency of this modular electrostatic precipitator design was approximately 80 %.

• Spatial Information Research
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• 제7권2호
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• pp.223-236
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• 1999

본 연구는 최근 시설의 확충이 절실히 요구됨에서 불구하고 사회적 기피시설로 인식되어 그 입지를 둘러싸고 많은 사회적 문제를 일으키고 있는 쓰레기 소각장의 후보입지를 선정하는데 있어서 보다 유연성있고 객관적인 방법론을 도입하여 의사결정을 위한 지원시스템으로의 GIS 기능을 높이려는데 목적을 두었다. 본 연구에서는 종전의 입지분석시에 주로 많이 활동된 부울 논리에 의한 단순 도면중첩기능의 문제점을 제시하고 쓰레기 소각장의 입지를 선정하는데 있어서 퍼지집합(Fuzzy Set) 과 계층분석과정(AHP : Anlaystic Hierarchy Process) 이론을 활용하여 후보 입지들에 대한 적합도 수준을 평가하는데 보다 유연성을 l할수 있는 방법론을 모색하였다. 특히 본 연구는 쓰레기 소각장의 후보입지들을 선정하는데 있어서 어떠한 요인을 기회요인으로 하였는가, 또한 각 요인들에 대한 상대적 중요성, 즉 가중치를 어떻게 설정하였는가에 따라서 다양한 결과들이 추출될 수 있음을 제시하려는데 초점을 두었다.

• Journal of Preventive Medicine and Public Health
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• 제36권4호
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• pp.314-322
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• 2003

Objectives : In this study, the exposure status of the hazardous substances from incinerators, such as polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), were studied , and the relationship between the exposure of these hazardous substances and their heath effects on the workers and residents near municipal solid waste (MSW) incinerators and an industrial incinerator investigated. Methods : Between July 2001 and Jure 2002, 13 workers at two MSW incinerators, 16 residents from the area around the two MSW incinerators, 6 residents from the control area, and further 10 residents near an industrial incinerator, estimated to emit higher levels of hazardous substances, were interviewed. Information, including sociodemographic information, personal habits, and work history, detailed gynecologic and other medical history were collected through interviews. Blood samples were also collected from 45 subjects, and analyzed for PCDD/DFs, by high resolution gas chromatography -high resolution mass spectrometry, using the US EPA 1613 method. In addition to the questionnaire survey, urinary concentrations of 8-hydroxydeoxyguanosine (8-OH-dG) and malondialdehyde (MDA) were measured as oxidative injury biomarkers. The urinary concentrations of 8-OH-dG were determined by in vitro ELISA, and the MDA by HPLC, using u adduct with thiobarbituric acid. Results : The PCDD/DFs concentrations in the residents near the industrial incinerator were higher than those in the controls, workers and residents near the MSW incinerators. The average TEQ (Toxic Equivalencies) concentrations of the PCDD/DFs in residents near the industrial incinerator were 53.4pg I-TEQs/g lipid. The estimated daily intakes were within the tolerable daily intake range (1-4 pg I-TEQ/Kg bw/day) suggested by WHO (1997) in only 30% to the people near the industrial incinerator. Animal studies have already shown that even a low body border of PCDD/DFs, such as 10 ng TEQ/kg bw, can cause oxidative damage in laboratory animals. Our study also showed that the same body burden of PCDD/DFs can cause oxidative damage to humans. Conclusions : The exposures to PCDD/DFs and the oxidative stress of residents near the industrial incinerator, were higher than those in the controls, workers and residents near the MSW incinerators. Proper protection strategies against these hazardous chemicals are needed. Because a lower body burden of PCDD/Fs, such as 10ng TEQ/kg bw, can cause oxidative damage, the tolerable daily intake range should be restrictedly limited to 1pg I-TEQ/kg bw/day.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 봄 학술발표회 논문집
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• pp.257-262
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• 2000

The purpose of this study is grasping quality aggregate using Bottom Ash of Industrial Waste Incinerator, and is evaluating possibility of application as construction materials. Cement and Fly ash is used with binder of aggregates using bottom ash. It is tested for basic property and strength of artificial aggregates, and the results are compared with crushed stone and elution tests is done for environmental safety. In the results of tests, it is confirmed that basic property and strength are lowe than crushed stone but the aggregates have possibility of application as artificial lightweight aggregates. When it is manufactured with aggregates, it is sage environmentally because of protecting elution of harmful heavy metals.

• 대한환경공학회지
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• 제35권8호
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• pp.540-546
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• 2013

이 연구에서는 C소각장에 반입되는 도시고형폐기물의 저위발열량을 추정할 수 있는 다중회귀직선식을 도시고형폐기물의 습량기준 물리적 조성 성분들로부터 유도하였다. 다중회귀직선식은 LHV = 1,670 + 39.20 Pl + 11.19 Pa - 11.27 Fo이었다. 여기서 LHV: 저위 발열량(kcal/kg), Pl: 습량기준 폐플라스틱류(wt %), Pa: 습량기준 폐종이류(wt %), Fo: 습량기준 음식물류(wt %)이다. 유도된 식의 수정결정계수($\bar{R}^2$)는 0.7476이었고, 이 식에 의한 추정 저위발열량과 측정 저위발열량의 절대백분율오차 평균은 2.42%로 아주 작았다. 그러므로 이 연구에서 유도된 식의 정확성이 높다는 것을 의미한다. 그리고 유도된 식으로 다른 4개 소각장에 반입되는 도시고형폐기물들에 대하여 추정 저위발열량과 측정 저위발열량의 절대백분율오차 평균은 수용할 수 있는 범위(4.74~20.11%)이었다. 더욱이 이 방법은 습량기준 도시고형폐기물의 물리적 조성 성분별로 분류하여 각 조성 성분들의 습량기준 중량 비율만 분석하면 도시고형폐기물의 저위발열량을 추정할 수 있어 보다 경제적이고 또한 대단히 효율적이다.

• 대한기계학회논문집B
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• 제22권5호
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• pp.627-639
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• 1998

A combustion model for the incineration of municipal solid waste(MSW) in the stoker type incinerator was developed by considering the variation of physical composition of MSW. Theoretical analysis and numerical simulation for the combustion characteristics in incinerator were conducted by using the present model and the effects of compositional variation on the incineration characteristics of MSW was examined theoretically. It is found that large excess air enhances drying, but depresses volatilization. For the large value of moisture content, pyrolysis is fast but drying is slow. As the value of plastic content increases, devolatilization becomes slower. Larger amount of primary air supply to the rear side of stoker leads to increase the possibility of delaying the combustion.

• 한국군사과학기술학회지
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• 제10권1호
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• pp.116-122
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• 2007

A 2-step process for the safe disposal of chemical warfare agents(agent hydrolysis followed by incineration In the submerged-quench incinerator) was studied to obtain basic data for the design of pilot plant in the future. Sample materials used for the hydrolysis reaction were sarin(GB), sulfur mustard (HD), and methylphosphonic difluoride(DF). The hydrolysates of these materials were thermally destroyed in a submerged-quench incineration system. Experimental conditions for achieving destruction efficiency of 99.99% in both steps were established and phosphoric acid was recovered from the waste water when destroying DF hydrolysate in the incinerator. Treated water could be reused as process water for the agent hydrolysis.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2005년도 추계학술대회 논문집
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• pp.341-343
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• 2005

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2006년도 춘계학술대회 논문집
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• pp.241-242
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• 2006