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A Study Plant of Chemical Cleaning Wastewater Reuse in SWI (Solid Waste Incineration)
( Kiheon Kim ),( Youngsam Yoon ),( Junik Son ),( Sunkyung Sin ),( Yonghyun Kwon ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
The study was to review the diversification of treatment as a substitute for chemicals(Urea solution and ammonia solution) by spraying· incinerating liquid chemical cleaning wastewater. According to the review results, when incinerating chemical cleaning wastewater, at least about 60 % of nitrogen oxides(NOx) reduction efficiency was shown. Ammonia(NH3) ingredient in chemical cleaning wastewater plays a role of a reducing agent of Selective Non-Catalytic Reduction(SNCR) and reduced the generation amount of nitrogen oxide(NOx) and is considered to have a substitution effect as a chemical(Ammonia, Urea etc.) used for removing nitrogen oxide(NOx). Thus, this study reviewed domestic relevant systems based on these results and derived institutional improvement(draft) for chemical cleaning wastewater incineration and treatment facilities management criteria(draft) etc.
( Suyoung Lee ),( Youngsam Yoon ),( Eunhye Kwon ),( Jisu Bae ),( Taewan Jeon ),( Sunkyoung Shin ) 한국폐기물자원순환학회(구 한국폐기물학회) 2017 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2017 No.-
As of 2013, approximately 253 domestic incineration facilities including incineration facilities for municipal waste and industrial wastes were collected. The distribution of domestic incineration heat through these incineration facilities is estimated to reach about 1,756 thousands toe by 2013. In this study, a high temperature and pressure boiler was applied to evaluate the improvement effect of power generation efficiency of waste incineration facilities. It is possible to increase the power generation efficiency of the steam turbine by increasing the heat loss of the turbine through the high temperature and pressure depending on the steam pressure and the temperature. The boiler main steam amount is reduced by about 10% due to the high temperature and pressure, but the increase rate of the heat fall rate is larger than the decrease rate of the steam flow rate, so that the power generation efficiency is improved. In case of steam temperature, the steam temperature is increased by 50 ℃ at 500 ℃ and 20 kg/㎠ at the pressure of 20 kg/㎠×300 ℃, and it is increased by 10 kg/㎠ to 60 kg/㎠, electricity production changes were investigated. Electricity production increased with increasing temperature and pressure. The electricity production increased by 51.03 % at 40 kg/㎠×400 ℃ and by 89.07 % at 60 kg/㎠×500 ℃, compared to the standard condition of 20 kg/㎠×300 ℃ for comparison. The boiler main steam amount is reduced by about 10 % due to the high temperature and pressure, but the increase rate of the heat fall rate is larger than the decrease rate of the steam flow rate, so that the power generation efficiency is improved. In case of steam temperature, the steam temperature is increased by 50 ℃ at 500 ℃ and 20 kg/㎠ at the pressure of 20 kg/㎠×300 ℃, and it is increased by 10 kg/㎠ to 60 kg/㎠. Electricity production changes were investigated. Electricity production increased with increasing temperature and pressure. The electricity production increased by 51.03 % at 40 kg/㎠×400 ℃ and by 89.07 % at 60 kg/㎠×500 ℃, compared to the standard condition of 20 kg/㎠×300 ℃ for comparison.
Lab-Scale 반응기를 활용한 PCP 함유 폐기물의 열적처리 가능성 연구
권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bae ),김우일 ( Woo-il Kim ),박호연 ( Hoyeon Park ),이원석 ( Wonseok Lee ),윤영삼 ( Youngsam Yoon ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 추계학술발표논문집 Vol.2019 No.-
잔류성유기오염물질(POPs)는 독성, 생체 축적 및 장거리 이동성을 특징으로 인간 건강 및 환경 보호를 위한 국제적 관리가 필요한 물질로써, 스톡홀름협약은 국제적 기준에 따라 POPs 함유 물질을 줄이고 근절하기 위한 조치가 취해지고 있다. 2015년 POPs 검토위원회(POPRC)에서는 HCBD, PCP, PCN 3가지 물질이 새롭게 지정되었다. 본 연구에서는 스톡홀름 협약 제 4 조를 달성하기 위해 새롭게 지정된 물질 중 하나 인 PCP 함유 폐기물의 환경 친화적인 처리를 달성하기 위한 열처리 표준을 확립하고자 했다. PCP 함유 폐기물은 ① 기본 시험(국내 소각 시설 처리 기준 만족, 연소 온도 850℃, 1,100℃) 및 ② 정밀 시험(저온, 연소 온도 300℃, 500℃, 700℃). 6개의 표본(보존 목재, 탄약 목재 상자 등)을 대상 샘플로 선택하고 물리적 특성을 반영하는 열처리 요소를 도출하였다. 기본 실험에서 6개의 시료에 대한 PCP 함량 분석 결과는 0.127 mg/kg ~ 68.4 mg/kg의 농도 범위를 나타내었다. 평균 PCP 분해율은 99.999%였으며, 최대 다이옥신 농도는 4.4794 ngI-TEQ/Sm<sup>3</sup> 검출되었다. 그리고 연소 후 배기가스에서 일반적인 대기 오염 물질의 결과, 산소 15.81 % ~ 18.35 %, CO 53.38 mg/L ~ 6,295.07 mg/L, SOx 8.81 mg/L ~ 64.67 mg/L 및 NOx 5.56 mg/L ~ 26.43 mg/L. 국내법에 제시된 배출 제한 기준과 비교하여 CO 농도는 표준 값을 초과했으며 소량의 소각로 때문에 내부 불완전 연소로 간주되었다. VOC (휘발성 유기화합물)의 경우, 벤젠, 톨루엔 등이 주로 검출되었고, 총 VOC 농도는 1,100℃ 보다 850℃에서 더 높은 경향을 나타냈다. 연소 잔류물에서 중금속의 분석 결과, Cr 및 Ni는 배출 한계 표준을 초과했으며, 이는 반응기 물질의 고온 산화 및 탈착의 결과로 간주되었다. 따라서 본 연구 결과를 바탕으로 다이옥신 전구체로 알려진 PCP로 인한 독성 물질의 생성을 방지하기 위해, 소각로의 안정적인 작동을 위해 소각로 작동 조건을 1,100℃ 및 체류 시간의 2초 이상으로 유지해야 된다고 사료된다.
( Jisu Bae ),( Youngsam Yoon ),( Eunhye Kwon ),( Taewan Jeon ),( Sunkyoung Shin ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
Persistent organic pollutants (POPs) are characterized by toxicity, bioaccumulation and long-distance mobility, and are substances that require international management for the purpose of human health and environmental protection. POPs are exposed through a variety of routes, and POPs released into the atmosphere are immersed in soil and water to cause central nervous system disease. The Stockholm Convention on POPs, led by the United Nations Environment Plan (UNEP) for risk management of POPs, designated new target substances (HCBD, PCP and PCN) in 2015. In this study, we aimed to establish a thermal treatment standard to achieve environmentally friendly treatment of PCP-containing waste, which is one of the newly designated substances for achieving the Article 4 of the Stockholm Convention. Two specimens (Technical sample, mixed sample) were selected as target samples and thermal treatment factors reflecting the physical properties were derived. Those two samples showed high PCP concentration of 68.4 mg/kg (technical sample which artificially made for experiments) and 17.4 mg/kg (mixed sample which same with municipal solid wastes of incineration facilities). The incineration conditions were set 300℃, 500℃ and 700℃ based on the temperature condition at which the material phase change of PCP occurred. The theoretical air contents were 3.95 ~ 4.78 Sm<sup>3</sup>/kg. Expected retention time in combustion reactor were 32.04 ~63.70 depending on each experiment conditions. The average PCP degradation rate was 99.999 % in all kinds of combustion experiment conditions. The evaluation for checking the presence of harmful substances in exhaust gas during the combustion was analyzed. The results of general air pollutant properties was as follows. The average air composition in high temperature condition were O<sub>2</sub> 19.61%, CO 7,126.06 ppm, CO<sub>2</sub> 0.82 ppm, SOx 36.20 ppm, NOx 23.52 ppm. Excepting the CO value, almost analysis factors were not exceeded the allowable emission standard in domestic legislation.
Lab-Scale 반응기를 이용한 PCNs 함유 폐기물의 소각처리 가능성 연구
권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bea ),김우일 ( Wooil Kim ),윤영삼 ( Youngsam Yoon ),이원석 ( Wonseok Lee ),박호연 ( Hoyeun Park ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.4
Polychlorinated naphthalenes (PCNs), one of Persistent Organic Pollutants (POPs), and are colorless crystalline substances with similar structure and physical and chemical properties with PCB (polychlorinated biphenyl), and are produced by the chlorination of naphthalene. PCN is one of POPs are rarely degraded in the environment; consequently, they negatively impact the environment by threatening human health and the ecosystem. In this study, the potential of a stable treatment for lab-scale-incinerated waste containing PCNs was evaluated. For this study, waste containing PCNs were selected as the surface coating agent, mixed sample, and technical sample. The results revealed that when the PCNs concentration was 34.552 ~ 2,582.463 ng/g, the concentrations of Mono-CN and Tetra-CN were higher than those of other homologues. The incineration treatment conditions were derived by measuring three parts, after which the elemental composition was analyzed and the calorific value, theoretical air content, and residence time were calculated. Using the temperature of the target sample, thermogravimetric analysis revealed that the incineration treatment can be achieved at the incineration temperature of the existing incineration facility via weight change. Therefore, the incineration temperature was set between 850 and 1,100℃; however, the incineration temperature of the sample containing a high concentration of PCNs was set at 350, 500, 850, and 1,100℃. At 350 and 500℃, high concentrations of CO and NOx were observed, which could be attributed to incomplete combustion. Furthermore, heat-sensitive PCNs showed a de-chlorination reaction between 200 to 440℃. In addition, the decomposition rate (DRE) slightly increased according to the incineration temperature increase.
Suyoung Lee,Youngsam Yoon,Eunhye Kwon,Jisu Bae,Taewan Jeon,Sunkyoung Shin 한국폐기물자원순환학회 2017 한국폐기물자원순환학회 학술대회 Vol.2017 No.05
As of 2013, approximately 253 domestic incineration facilities including incineration facilities for municipal waste and industrial wastes were collected. The distribution of domestic incineration heat through these incineration facilities is estimated to reach about 1,756 thousands toe by 2013. In this study, a high temperature and pressure boiler was applied to evaluate the improvement effect of power generation efficiency of waste incineration facilities. It is possible to increase the power generation efficiency of the steam turbine by increasing the heat loss of the turbine through the high temperature and pressure depending on the steam pressure and the temperature. The boiler main steam amount is reduced by about 10% due to the high temperature and pressure, but the increase rate of the heat fall rate is larger than the decrease rate of the steam flow rate, so that the power generation efficiency is improved. In case of steam temperature, the steam temperature is increased by 50 ℃ at 500 ℃ and 20 kg/㎠ at the pressure of 20 kg/㎠×300 ℃, and it is increased by 10 kg/㎠ to 60 kg/㎠, electricity production changes were investigated. Electricity production increased with increasing temperature and pressure. The electricity production increased by 51.03 % at 40 kg/㎠×400 ℃ and by 89.07 % at 60 kg/㎠×500 ℃, compared to the standard condition of 20 kg/㎠×300 ℃ for comparison. The boiler main steam amount is reduced by about 10 % due to the high temperature and pressure, but the increase rate of the heat fall rate is larger than the decrease rate of the steam flow rate, so that the power generation efficiency is improved. In case of steam temperature, the steam temperature is increased by 50 ℃ at 500 ℃ and 20 kg/㎠ at the pressure of 20 kg/㎠×300 ℃, and it is increased by 10 kg/㎠ to 60 kg/㎠. Electricity production changes were investigated. Electricity production increased with increasing temperature and pressure. The electricity production increased by 51.03 % at 40 kg/㎠×400 ℃ and by 89.07 % at 60 kg/㎠×500 ℃, compared to the standard condition of 20 kg/㎠×300 ℃ for comparison.