• Title, Summary, Keyword: Waste incineration

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A Study on the Problems of Incinerating Facility and Plans to Improve in Regard to Separate Discharge of Food Waste (음식물류폐기물 분리배출에 따른 소각시설의 문제점과 개선방안에 관한 연구)

  • Kim, Seong-Jung;Kim, Dong-Hyuk
    • Journal of the Korea Organic Resources Recycling Association
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    • v.16 no.4
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    • pp.74-81
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    • 2008
  • Due to separate discharge of food waste, large incinerating facilities for municipal waste show the phase change that combustible contents have been increasing while the concentrations of water have been decreasing when wastes are brought in. This phase change of wastes leads to the increase of exothermic value when wastes are carried in, which causes the problems to make the durability of incinerating facilities weak and lower the capacities of them. In accordance with these problems, this study was carried out to present effective plans to operate incinerating facilities as the quantities of municipal wastes of Incheon have been gradually increasing. We examined the problems caused by the phase change of municipal waste in Incheon and managing plans to control the amounts of heat output when intermixed incineration of food waste is conducted. It is concluded that we could carry out the optimized operation of incinerating facilities as well as produce economic effect to reduce processing costs when we conduct the intermixed incineration of food waste and municipal waste, in the trend that the amounts of heat output generated by wastes are gradually increasing. This is because this operation of intermixing incineration contributes to reducing the amount of exothermic heat.

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An Equilibrium Analysis to Determine the Speciation of Metals in the Incineration of Waste Containing Chlorine (염소를 함유한 폐기물의 소각시 생성되는 유해 중금속류 결정에 대한 화학 평형 계산)

  • ;;Hwang, Jung-Ho
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.12
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    • pp.3372-3381
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    • 1995
  • An equilibrium analysis was carried out to determine principal species of heavy metals in waste incineration and their behaviors with variation of temperature, chlorine concentration, excess air ratio, and C/H ratio. The waste was assumed as a compound of hydrocarbon fuel, chlorine, and metals. Calculated results showed that the most important parameter to determine the principal species was temperature. Chlorine concentration also affected on mole fractions of the principal species. Generally principal species at high temperature were chlorides while there were some metals of which principal species were oxides. At low temperature mole fractions of the principal species increased, but at high temperature mole fractions of some metal species decreased. C/H ratio of the hydrocarbon fuel and excess air ratio had little effect on mole fractions of the metal species, compared to the temperature and chlorine concentration.

New Trend of Incineration Technology for Waste Treatment (폐기물 소각기술의 변천과 신기술 동향)

  • Kim Seong-Jung;Park Hyun-Seo
    • Journal of the Korean Institute of Resources Recycling
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    • v.13 no.4
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    • pp.46-52
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    • 2004
  • The present main research direction of waste treatment is the development of incineration system for low pollution. Also, heat value of waste is increased because of the rising of living standard, environmental consideration and collection of sorted waste for recycling. Therefore, many researches have been continued for solving ash problem including heavy metals, dioxin problem and high energy efficiency by use of high heat value. This study is described for the facilities of pyrolysis system, pyrolysis-melting system, pyrolysis-gasification melting system.

Analysis of VOCs Produced from Incineration of Plastic Wastes Using a Small- Electric Furnace (소형전기로를 이용한 플라스틱류 소각시 발생하는 VOCs 농도분석)

  • Lee Byeong-Kyu;Kim Haengah
    • Journal of Korean Society for Atmospheric Environment
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    • v.20 no.6
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    • pp.759-771
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    • 2004
  • This study analyzed concentrations of volatile organic compounds (VOCs) produced from incineration of plastic wastes at $600^{\circ}C$. The plastic wastes used in this study included polyethyleneterephthlate (PETE), high density polyethylene (HOPE), polyvinyl chloride (PVC), low density polyethylene (LOPE), polypropylene (PP), polystyrene (PS) and other. Plastic wastes were heated from room temperature upto $600^{\circ}C$ providing the compressed air inside of a small-scale electric furnace for 90 minutes and then they were oxidized (incinerated) for 60 minutes at $600^{\circ}C$ maintaining the same air supply. VOCs emitted from the incineration process were sampled using an air sampling pump and Tedlar air bags for 150 minutes and then the components and concentrations of the VOCs were analyzed by a GC-MS. The most prominent chemical structure of the VOCs obtained from the incineration process of the HOPE, LOPE and PP, which include ethylene groups in their main chains, was identified as aliphatic hydrocarbons such as 1-hexene. However, aromatics such as benzene were major chemical structure from the incineration of PETE, PVC and PS which include benzene rings in their main chains. This study estimated the total VOC production from the incineration of the plastic wastes based on the real plastic waste production and the emission factors. 64% and 27% of the total VOC emissions consisted of aliphatic hydrocarbons and aromatics, respectively, which have double bonds within their molecular structure and thus a high ground level ozone formation potential.

An Study on Compressive Strength Properties of Mortar with Municipal Solid Waste Incineration Ash Melted Slag Powder (쓰레기 소각재 용융슬래그 미분말을 혼입한 모르타르의 압축강도 특성에 대한 연구)

  • Lee, Yong-Moo;Kim, Young-Su
    • Journal of the Korea Institute of Building Construction
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    • v.16 no.1
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    • pp.53-58
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    • 2016
  • In order to investigate the feasibility of municipal solid waste incineration ash melted slag powder as admixture, an experimental study was performed on cement mortar with municipal solid waste incineration ash melted slag powder. Fresh mortar properties and strength properties with various municipal solid waste incineration ash melted slag powder replacement ratios were estimated. There replacement ratio adopted in this study was 0, 10, 20, 30, 40, 50%. After then flow properties was considered as properties of fresh mortar. And compressive strength was determined 3, 7, 14, 28, 56 days for the hardened mortar specimens. According to the test results, the flow of mortar was increased with in replacement amount of municipal solid waste incineration ash melted slag powder. Furthermore, compressive strength at early age was decreased, whereas the compressive strength at the age of 28, 56day was increased.

Application of AIM(Asia-Pacific Integrated Model)/Material to Korea : A Study on Effects of CO2 Emission Reduction (우리나라의 폐기물처리 통합분석모형 개발과 이산화탄소 배출저감 연구)

  • Jo, Sunghan
    • Environmental and Resource Economics Review
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    • v.14 no.2
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    • pp.419-445
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    • 2005
  • In 2002, the waste was generated about 277,533tons per day. The treatments of waste were recycling, which had accounted for almost 70%, landfill, which had accounted for 19.8%, and incineration, which had accounted for 6.5%. The energy recovery from incineration has been increased since 1995. The portion of waste in the renewable energy has been increased. Waste incineration heating system generates total 134TOE of $CO_2$ as compared to 6,800TOE of GHG from LNG boiler centralized heating system to bring 98% reduction rate of GHG emissions. We need the integrated model to examine the impacts of waste managements on economy and environments. The Asia-Pacific Integrated Model is introduced as the example of the integrated model.

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Mechanical Characteristics of Municipal Waste Incineration Bottom Ashes (생활폐기물 소각 바닥재의 역학적 특성)

  • Oh, Myounghak;Lee, Jeonghyeop;Park, Haeyong;Cho, Wanjei
    • Journal of the Korean Geoenvironmental Society
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    • v.16 no.11
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    • pp.21-27
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    • 2015
  • Due to the population growth and development of industry, waste from household and industries has increased. As the advanced countries experienced these problems, they have already started research on recycling methods of waste incineration ashes. Domestic recycling rate of incineration ash became up to 80 percent as high as the level of developed countries, but the recycling was limited to fly ash for admixture in concrete. In case of bottom ash, most of bottom ash was reclaimed in the landfills. Therefore, basic physical property and mechanical experiments for bottom ash were conducted in this study to evaluate the possibility of incineration bottom ash as an alternative construction materials. Bottom ashes from three different landfills with two different incineration methods were tested. Incineration methods are Stoker type Incinerator and Pyrolysis-Melting Treatment. Bottom ash can be used as an alternative granular material for construction based on the basic physical property and mechanical characteristics similar to those of sandy materials. However, the incineration method should be considered since it can affect the material and mechanical characteristics of the incineration bottom ash.

A Study on Behavior of Heavy Metals during Waste Incineration (폐기물 소각시 중금속 성분의 거동에 관한 연구)

  • 박용이;허철구
    • Journal of Environmental Science International
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    • v.5 no.6
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    • pp.785-799
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    • 1996
  • The incineration tests of mixed industrial wastes using the stoker type incinerator are carried out to investigate the partitioning characteristics of heavy metals during incineration. The results obtained from this study are as follow. The partitioning characteristics of heavy metals throughout this incinerator are found that, at given condition of $700^{\circ}C$, the elements with the relatively high boiling point such as Cr, Cu and Pb are partitioned into a bottom ash, a fry ash captured tv cyclone, and a flue gas stream, 67~88%, 2~19% and 6~16% of initial amount entering the incinerator, respectively, but the Cd and Hg of 75~81% is vaporized into the flue gas. It appears that the partitioning characteristics according to the particle size of ash is different between the bottom ash and the fly ash. For bottom ash, the fraction of partitioning into 75${\mu}{\textrm}{m}$ oversized particles is reatively high. For fly ash, the characteristics of distributions with the particle size can not be clearly shown.

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Manufacture of the Non-Sintered Aggregate Using the Industrial By-products and the Municipal Waste Incineration Fly-Ash (도시 쓰레기 소각 비산재와 산업부산물을 이용한 비소성 인공골재의 제조)

  • 김대규;윤성진;문경주;소양섭
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.69-74
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    • 2002
  • Incineration method of municipal solid waste is the general method for reduction it's quantity and weight. Municipal solid waste incineration ash is classified two general types of ash : fly ash((MWFA) and bottom ash(MWBA)). MWFA containing a high degree heavy-metal may give rise to a serious environmental trouble. Therefore, this study was carried out to examine utilization of fly ash. In this study, we tried to find the recycling method of fly ash as a environmental-friendly artificial aggregate. The artificial aggregate using fly ash was tested for the various aspects, including physical properties and environmental stability. The qualities of artificial aggregate are similar to it of lightweight aggregate, and the heavy metal leaching concentration are very lower than a limitation of KSLT and EP.

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An Equilibrium Analysis to Determine the Speciation of Metals in the Incineration of Waste Containing Chlorine and Sulfur (염소와 황을 함유한 폐기물의 소각시 생성되는 유해 중금속류 결정에 대한 화학평형 계산)

  • Lee, Jung-Jin;Hwang, Jung-Ho
    • Journal of the Korean Society of Combustion
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    • v.1 no.1
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    • pp.31-39
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    • 1996
  • An equilibrium analysis was carried out to determine principal species in the incineration of hazardous waste, which was assumed as a compound of hydrocarbon fuel, chlorine, sulfur, and heavy metals, and their behaviors with variation of temperature, chlorine and sulfur concentrations. Calculated results showed that the most important parameter influencing the principal species was temperature. Chlorine concentration affected on mole fractions of the species, especially at high temperature. Existence of sulfur had a significant effect on the species at low temperature, regardless of surfur concentration. Generally, principal species at high temperature were chlorides and oxides, while the principal species at low temperature were sulfides. As temperature increased, mole fractions of the principal species increased at low temperature, however, mole fractions of some metal species decreased at high temperature.

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