• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.334-344
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• 2024

In Dangjin, Chungcheongnam-do, there are not only power plants and large steel complexes, but also small and medium-sized air pollutant emission facilities. The dust generated by these facilities has a very small particle size and a large surface area due to condensation and physical and chemical reactions, and is discharged containing various harmful substances. Therefore, this study analyzed the distribution of particulate matter and heavy metal concentrations by particle size in the vicinity of the steel complex, residential area, and reference point using an eight-stage Cascade Impactor. Overall, the direct impact sites with a short distance from the steel complex had the highest concentration, followed by the indirect impact sites, and the non-impact sites had the lowest concentration, indicating that they are directly affected by the steel complex. The atmospheric dust concentration distribution showed a bimodal distribution with a minimum value around the 1.1 to 2.1 ㎛ particle diameter. However, during the yellow dust event, the maximum concentration was biased toward coarse particles. The proportion of PM2.5 in the dust tended to be higher in winter, while the ratio between PM2.5 and PM10 was relatively higher in spring. Regardless of the location of the impact point, heavy metals in the dust were dominated by iron and aluminum, followed by zinc, lead, and manganese.

• 유기물자원화
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• 제23권1호
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• pp.63-69
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• 2015

본 연구는 포항철강산업단지를 대상으로 부산물 발생 현황과 현재까지 구축된 산업공생 네트워크를 분석하는데 목적을 두었다. 포항은 경상북도 시군 중 사업장 폐기물 발생량과 재활용 제외 폐기물 발생량이 모두 가장 높았으며, 대부분이 포항철강산업단지에서 발행하였다. 부산물 발생량을 조사한 결과 재활용을 제외한 폐기물 발생량의 대부분은 광재류가 차지하고 있으며 폐목재류, 분진류, 폐합성수지, 폐합성고무의 순으로 나타났다. 포항철강산업단지 입주기업간 구축된 부산물 거래 공생맵을 작성한 결과 부산물 중 폐내 화물 및 슬래그를 이용한 부산물 거래가 가장 활발하게 이루어지는 것으로 나타났다.

• 한국산학기술학회논문지
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• 제13권11호
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• pp.5601-5609
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• 2012

본 논문은 포항철강공단 및 주변지역의 보건 및 환경영향 인자를 확인하기 위하여 미세먼지($PM_{10}$) 농도와 성분을 측정 및 분석하였다. 또한 지역대기자동측정망 자료를 이용하여 연별, 계절별 $PM_{10}$ 농도분포를 조사하였다. 공단지역 내 $PM_{10}$을 측정한 결과, 동일산업에서 측정된 $PM_{10}$ 평균농도는 $61.3{\pm}12.1{\mu}g/m^3$, 철강공단관리사무소에서 측정된 $PM_{10}$ 평균농도는 $44.3{\pm}8.1{\mu}g/m^3$으로 나타나 대기환경기준을 만족하였다. 공단지역 동일산업과 철강공단관리사무소에서 측정된 $PM_{10}$ 중 이차생성 이온인 ${SO_4}^{2-}$, $NO_3{^-}$, $NH_4{^+}$의 분율을 확인한 결과, ${SO_4}^{2-}$의 분율이 높게 나타났고, 황산염과 관련된 오염원이 철강공단지역에 존재하는 것으로 판단된다. 전체적으로 동일산업 지점에서는 ${SO_4}^{2-}$ > $Cl^-$ > $NO_3{^-}$ > $F^-$ > $NH_4{^+}$ 순으로 나타났고, 철강공단관리사무소 지점에서는 ${SO_4}^{2-}$ > $Cl^-$ > $NO_3{^-}$ > $NH_4{^+}$ > $F^-$ 순으로 나타났다.

• 한국환경보건학회지
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• 제42권3호
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• pp.213-223
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• 2016

Objectives: This study was designed to assess the level of physical exposure to heavy metals among residents who live around a Chungcheongnam-do Province industrial complex and to provide baseline data on the effects and harms of heavy metals on the human body by comparing their exposure levels to those of people from control regions. Methods: We measured blood lead and cadmium levels and urine mercury and chromium levels and conducted a survey among 559 residents from the affected area and 347 residents of other areas. Results: Blood lead and cadmium levels and urine mercury levels were significantly higher in the case region than among those in the control region (p=0.013, p<0.001, p<0.001, respectively). In the thermoelectric power plant area, blood cadmium and urine mercury levels were significantly higher than in the control region (p<0.001, p<0.001, respectively). In the steel mill and petrochemical industry areas, blood cadmium level was significantly higher than that in the control region (p<0.001). Dividing groups by the reference level of blood cadmium ($2{\mu}g/L$), the odds ratios between the case and control regions were 2.56 (95% CI=1.83-3.58), 3.11 (95% CI=2.06-4.71) for the thermoelectric power plant area, 1.78 (95% CI=1.19-2.65) for the steel mill area and 4.07 (95% CI=2.40-6.89) for petrochemical industry area. Conclusion: This study showed that the levels of exposure to heavy metals among residents living near a Chungcheongnam-do Province industrial complex were significantly higher than those in the control region. This seems to be attributable to exposure to heavy metals emissions from the industrial complex. Further research and safety measures are required to protect residents' health.

• 기술혁신학회지
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• 제8권1호
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• pp.209-219
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• 2005

o Korea consumed total 198.5 million TOE and the portion of crude oil n was 100.4 million TOE in 2002 which marked the 10th largest energy consuming country and ranks the $4^{th}$ crude oil consumer in the world. o Industries consumed 51.5% of the total energy and 93% of industrial energy was used at the manufacturing industries such as steel, textile, chemical, food and beverage, pulp and paper, and timber industries, which lead to energy intensive industries numbered 110,000. o Also Korea ranks the $10^{th}$ greenhouse gas emission countries of the world (134.9 million TC) which may cause Korean industries to suffer severely during the implementation of United Nations Framework Convention on Climate Change (UNFCCC). o Therefore, the target of the study is to develop a model for the analysis and design of industrial complex by integration of the energy usage and environmental problems. o The research work contents are as followings: -Analysis of Korea energy consumption -Concept of the integration of energy and environment problems - Basic concept of industrial complex planning - Case study (1) - Recommendation and conclusion

• 시스템엔지니어링학술지
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• 제10권2호
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• pp.21-31
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• 2014

Recently, global market competition of iron and steel products is ever increasing due to over-supply from increased number of industries in rapidly growing countries, such as China, Brazil, and Indonesia. To occupy the big market, major industries are trying to develop high quality, high performance steel products via developing a new iron and steel making process. In other words, development of a new and innovative steel plant is a key to cope with the tough situation. Design and development for the life cycle of iron and steel making plant is very much complex and multi-disciplinary. In this paper, Plant Systems Engineering (PSE), a tailored SE process for industrial plant based on ISO/IEC 15288 is used for the design of Continuous Casting Process (CCP) Plant system. The CCP is a crucial process in steel making plant, whose design technology is occupied by the advanced foreign companies. For the sake of increasing engineering capability for the design of CCP, we applied PSE Process for the renovation of the existing CCP Process. Through the study, we were convinced that the applied method can be used for other plant systems, and SE is really the way of thinking, design, and development of modern complex and multi-disciplinary systems where high risk factors are present throughout the whole life cycle.

• 화약ㆍ발파
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• 제40권4호
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• pp.35-46
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• 2022

오래된 산업단지를 해체하고 해체한 산업부지를 원래의 자연환경으로 복원하는 공사가 진행 중인 가운데, 본 논문에서는 노후화된 산업단지 내의 대형 철골구조물 중 하나인 터빈동을 발파해체공법 중 점진붕괴공법을 적용하여 해체한 사례를 소개한다. 터빈동을 절단 해체하기 위해 금속 제트가 발생하는 장약용기를 사용하였다. 발파구간 중 절단 두께가 두꺼운 부분은 가스와 산소 불꽃 또는 아크열에 의해 깊은 홈을 파는 방법인 가우징을 적용하여 절단 두께를 30mm 이하로 조절하였다. 터빈동 발파해체에 사용한 총 장약량은 175kg, 전자뇌관 165발, 장약용기 124개이다. 발파해체 결과, 터빈동은 예측한 방향으로 붕괴하였으며, 주변 시설물에 피해 없이 발파해체를 완료하였다.

• 한국산학기술학회논문지
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• 제19권3호
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• pp.52-60
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• 2018

최근 자동차 산업에서는 연비향상 및 안전규제 강화에 따라 차량 경량화가 필수적으로 요구됨에 따라 DP강(Dual Phase steel), CP강(Complex Phase steel), MS강(Martensitic Steel), TRIP강(Transformation Induced Plasticity steel), TWIP강(Twinning Induced Plasticity steel) 등과 같은 인장강도 700MPa 이상인 초고장력강(Ultra High Strength Steel)의 적용이 증가하고 있다. 초고장력강을 차체에 적용하기 위해서는 용접공정이 필수적이며, 원가 측면에서 유리한 전기저항점용접(Resistance Spot Welding, RSW)이 차체 용접에서 80%이상으로 가장 많이 적용되고 있다. 초고장력강은 강도향상을 위해 합금원소 함량을 늘이기 때문에 일반적으로 용접성이 열악한 것으로 알려져 있다. 이러한 초고장력강의 저항점용접의 경우 적정 용접조건 영역이 축소되고 용접부에서 계면파단 및 부분계면파단이 발생하는 것으로 보고되어 있어 결함 및 품질을 실시간으로 예측할 수 있는 용접품질 판정 연구가 활발히 진행되고 있다. 이에 따라 본 연구에서는 저항 점 용접을 수행할 때 검출되는 2차 회로 공정 변수를 이용하여 용접부의 동저항을 모니터링하고, 이 동저항 패턴에서 용접 품질 판단에 필요한 인자들을 추출하였다. 추출한 인자들을 상관분석하여 용접 품질과의 상관성을 파악하였으며, 상관성이 높은 인자들을 이용하여 회귀분석을 실시하였다. 이를 근거로 현장 적용이 가능한 회귀 모델을 제시하였다.

• Environmental Analysis Health and Toxicology
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• 제31권
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• pp.17.1-17.7
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• 2016

Objectives This study aimed to evaluate the relationship between residential district of people, such as power plant, steel-mill and petrochemical industries, and health-related quality of life (HRQoL). Methods Using a cross-sectional study design, we randomly recruited participants for our study from industrial areas (thermoelectric power plant, steel-mill, petrochemical industry) and rural areas. Logistic regression analysis was used to identify the relationships between Euro quality of life-5 dimension (EQ-5D) scores and living region, while controlling for sociodemographic characteristics. Results In adjusted model, quality of life decreased with increasing category of age and were lower for females than males. EQ-5D scores of people living in the vicinity of thermoelectric power plant were significant lower than those of people living the vicinity of comparison region (odds ratio, 1.59; 95% confidence interval, 1.00 to 2.53). Conclusions Living region of thermoelectric power plant, was strongly associated with scores on the EQ-5D. More research is needed to elucidate the mechanisms which makes the relationship with the living regions and HRQoL.

• 화약ㆍ발파
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• 제40권3호
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• pp.66-76
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• 2022

최근 오래된 산업단지의 해체수요가 증가하고 있으며, 해체된 산업부지를 원래 자연환경으로 복원하는 공사를 진행하고 있다. 본 시공사례는 오래된 산업단지 내의 대형 철골구조물을 해체하기 위해 발파해체공법 중 전도공법을 적용하였다. 철골구조물을 절단하기 위해 금속 제트가 발생하는 장약용기를 사용하였다. 발파구간 중 철골구조물의 두께가 두꺼운 부분은 가스와 산소 불꽃 또는 아크열에 의해 깊은 홈을 파는 방법인 가우징을 적용하여 두께를 조절하였다. 발파해체 결과, 철골구조물은 예측된 방향으로 정확히 전도하였으며, 주변 시설물에 피해 없이 발파해체를 완료하였다.