• Title/Summary/Keyword: Coal-Fired Thermal Power Plant

검색결과 62건 처리시간 0.033초

구조적 제약조건을 갖는 500 MW 석탄화력발전소 탈황설비의 성능개선 (Performance Enhancement of Flue Gas Desulfurization System with Structural Constraints in 500 MW Coal Fired Power Plants)

  • 김종성;유호선
    • 플랜트 저널
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    • 제15권4호
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    • pp.30-35
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    • 2019
  • 미세먼지 감축에 대한 사회적 요구 증가와 강화되는 대기오염물질 배출허용기준을 충족시키기 위해 구조적 제약조건을 갖는 500 MW급 석탄화력발전소 탈황설비의 성능개선 방안을 제시하였다. 탈황설비 흡수탑을 통과하는 배기가스가 선회하도록 내부 설비를 개조하여 난류를 형성시켜 물질전달효율을 증가시키고 반응 면적 및 시간을 증가시킴으로써 황산화물 저감 및 먼지 포집 능력을 향상시킬 수 있었다. 개선결과 황산화물 제거효율은 91.61%에서 98.43%로 향상되었고 먼지 제거성능은 77.4%에서 87.08%로 향상되었다. 배출농도는 황산화물 7.85 ppm, 먼지 4.67 mg/㎥이 배출되어 2023년의 대기오염물질 배출허용기준인 황산화물 25 ppm, 먼지 5 mg/㎥을 만족하는 수준이다. 본 연구의 성능 개선 방식은 유사한 제약조건을 갖는 다른 석탄화력발전소에도 효과적으로 적용될 수 있으리라 기대된다.

1,000 MW 석탄화력발전소 대기환경오염물질 제거효율 향상을 위한 탈황설비 성능개선 (Enhancement of Desulfurization System Efficiency in 1,000 MW Coal-Fired Power Plants)

  • 이영수;문승재
    • 플랜트 저널
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    • 제17권2호
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    • pp.32-41
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    • 2021
  • 최근 미세먼지 등 대기환경 문제가 국가적 이슈로 급부상 하고있는 추세이며 특히 석탄화력발전소에 대한 강도높은 환경규제치가 적용되고 있는 실정이다. 본 연구는 석탄화력발전소 주요 대기오염 배출물질인 황산화물과 먼지 제거를 위한 탈황설비 성능개선 사례에 대해 소개하고 있으며 현재 운영중인 1,000 MW 발전소의 성능개선을 위한 네가지 Case Study를 수행하고 공사를 하였다. 탈황설비 흡수탑 개조를 통해 액기비를 증대시켰으며 산화공기 유량을 증대시켜 기액 반응을 촉진하였다. 또한 가스가스히터 누설률을 개선하여 최종 탈황설비 효율을 향상시켰다. 기존 설비와 조화를 고려한 성능개선 공사를 통해 2023년부터 적용될 규제치(황산화물 25ppm, 먼지 5mg/Sm3)를 만족할 것으로 예상되며 타 화력발전소에 검토 및 적용하는데 참고될 수 있다고 기대된다.

미분탄화력발전에서의 바이오매스 혼소 시 플랜트 성능특성 평가 (Evaluation of Plant Performance during Biomass Co-firing in Pulverized Coal Power Plant)

  • 문태영;;이은도;이정우;양원
    • 한국연소학회지
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    • 제19권3호
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    • pp.8-17
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    • 2014
  • The aims of this research were to evaluate effects of biomass co-firing to pulverized coal power plants and the variation of co-firing ratios on the plant efficiency related to power consumption of auxiliary system and flue gas characteristics such as production and component by process simulation based on the existing pulverized coal power plant. In this study, four kinds of biomass are selected as renewable fuel candidates for co-firing: wood pellet(WP), palm kernel shell(PKS), empty fruit bunch(EFB) and walnut shell(WS). Process simulation for various biomass fuels and co-firing ratios was performed using a commercial software. Gas side including combustion system and flue gas treatment system was considering with combination of water and steam side which contains turbines, condenser, feed water heaters and pumps. As a result, walnut shell might be the most suitable as co-firing fuel among four biomass since when 10% of walnut shell was co-fired with 90% of coal on thermal basis, flue gas production and power consumption of auxiliary systems were the smallest than those of other biomass co-firing while net plant efficiency was relatively higher than those of other biomass co-firing. However, with increasing walnut shell co-firing ratios, boiler efficiency and net plant efficiency were expected to decrease rather than coal combustion without biomass co-firing.

석탄 화력발전소에서 발생하는 미연분의 특성분석 및 저감방법 (Characteristics of Carbonaceous Particles Derived from Coal-fired Power Plant and Their Reduction)

  • 박호영;김영주;유근실;김춘근;김동훈
    • 대한환경공학회지
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    • 제28권10호
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    • pp.1065-1073
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    • 2006
  • 영흥 화력발전소 1호기 보일러에서 발생된 미연분은 석탄 회의 재활용 및 보일러 효율 측면에서 문제를 일으키고 있었다. 본 연구에서는 미연분 및 사용 석탄의 특성과 현장의 연소조건 분석을 수행하고 보일러 운전조건을 변경하므로서 보일러에서 발생되는 미연분을 저감하고자 하였다. 미연분의 물리, 화학적 분석 결과 대부분 중공(中空)형태의 Cenosphere와 뭉쳐진(Agglomerated) 형태의 Soot로 이루어져 있었다. 영흥 화력발전소에서 사용중인 6개 탄종에 대하여 Tar 및 Soot의 발생 가능량을 CPD(Chemical Percolation Devolatilization) 모델을 이용하여 조사한 결과, Sanseo, Ensham, Elk Valley 탄의 경우 그 발생 가능량이 비교적 적었으며 Peabody, Arthur, Shenhua 탄은 높았다. 영흥 화력발전소 1호기 보일러의 각 미분탄 공급관에서의 미분탄 공급량을 측정하였는데 코너 별로 공급되는 몇몇 버너에서 미분탄이 편중되어 공급되고 있음을 알 수 있었다. 이에 따라 soot가 주성분인 미연분의 산화율을 증가시키기 위하여 과잉공기량을 증가시키고 산화제와의 혼합정도를 높이기 위하여 SOFA(Separated Over Fire Air)의 yaw 각도를 적절히 조절함으로서 미연분의 발생량을 현저히 감소시킬 수 있었다.

석탄화력 발전소의 LOAD RUN BACK에 관한 연구 (A Study on the Load Run Back Control of a Coal Fired Power Plant.)

  • 송성일;황재호;박형구;김흥록
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1989년도 하계종합학술대회 논문집
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    • pp.94-97
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    • 1989
  • This work describes the imortance of the load run back control of a thermal power plant which has a serious effect on a power system, and shows the load run back tests results which was carried out at BORONG Thermal Power Plant, finally suggests what control circuits should be modified in the plant control system in order to prevent plant trip in case of auxiliary machine failure.

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A Study On the Design Of Fuzzy Controller for the Steam Temperature Process in the Coal Fired Power Plant

  • Shin, Sang-Doo;Kim, Yi-Gon;Lee, Bong-Kuk
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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    • pp.350-353
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    • 2003
  • In this paper, we proposed the method to design fuzzy controller using the experience of the operating expert and experimental numeric data for the robust control about the noise and disturbance instead of the traditional PID controller for the main steam temperature control of the thermal power plant. The temperature of main steam temperature process has to be controlled uniformly for the stable electric power output. The process has the problem of the hunting for the cases of various disturbances. In that case, the manual action of the operator happened to be introduced in some cases. We adopted the TSK (Takagi-Sugeno-Kang) model as the fuzzy controller and designed the fuzzy rules using the informations extracted directly from the real plant and various operating condition to solve the above problems and to apply practically. We implemented the real fuzzy controller as the Function Block module in the DCS(Distributed Control System) and evaluated the feasibility through the experiment81 results of the simulation.

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Removal of iron oxide scale from boiler feed-water in thermal power plant by high gradient magnetic separation: field experiment

  • Akiyama, Yoko;Li, Suqin;Akiyama, Koshiro;Mori, Tatsuya;Okada, Hidehiko;Hirota, Noriyuki;Yamaji, Tsuyoshi;Matsuura, Hideki;Namba, Seitoku;Sekine, Tomokazu;Mishima, Fumihito;Nishijima, Shigehiro
    • 한국초전도ㆍ저온공학회논문지
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    • 제23권3호
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    • pp.14-19
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    • 2021
  • The reduction of carbon dioxide emissions becomes a global issue, the main source of carbon dioxide emissions in the Asian region is the energy conversion sector, especially coal-fired power plants. We are working to develop technologies that will at least limit the increase in carbon dioxide emissions from the thermal power plants as one way to reduce carbon dioxide emissions. Our research aims to reduce carbon dioxide emissions by removing iron oxide scale from the feedwater system of thermal power plants using a superconducting high-gradient magnetic separation (HGMS) system, thereby reducing the loss of power generation efficiency. In this paper, the background of thermal power plants in Asia is outlined, followed by a case study of the introduction of a chemical cleaning line at an actual thermal power plant in Japan, and the possibility of introducing it into the thermal power plants in China based on the results.

CO2 sequestration and heavy metal stabilization by carbonation process in bottom ash samples from coal power plant

  • Ramakrishna., CH;Thriveni., T;Nam, Seong Young;kim, Chunsik;Ahn, Ji Whan
    • 에너지공학
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    • 제26권4호
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    • pp.74-83
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    • 2017
  • Coal-fired power plants supply roughly 50 percent of the nation's electricity but produce a disproportionate share of electric utility-related air pollution. Coal combustion technology can facilitate volume reduction of up to 90%, with the inorganic contaminants being captured in furnace bottom ash and fly ash residues. These disposal coal ash residues are however governed by the potential release of constituent contaminants into the environment. Accelerated carbonation process has been shown to have a potential for improving the chemical stability and leaching behavior of bottom ash residues. The aim of this work was to quantify the volume of $CO_2$ that could be sequestrated with a view to reducing greenhouse gas emissions and stabilize the contaminated heavy metals from bottom ash samples. In this study, we used PC boiler bottom ash, Kanvera reactor (KR) slag and calcined waste lime for measuring chemical analysis and heavy metals leaching tests were performed and also the formation of calcite resulting from accelerated carbonation process was investigated by thermo gravimetric and differential thermal analysis (TG/DTA).

Retrofit of Analog Boiler Control Systems with Digital Control Systems in a Thermal Power Plant

  • Park, Doo-Yong;Byun, Seung-Hyun
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.1304-1308
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    • 2005
  • This paper presents the case that the existing analog control systems were retrofitted with digital DCS(Distributed Control System)s for boiler unit in thermal power plant. Replacement of existing worn-out or obsolete analog control systems has been considered. Replacement of existing analog control systems with another analog control systems has lots of difficulties in maintaining the systems due to being out of stock. Due to those difficulties, existing analog control systems have been retrofitted with digital DCSs in many industrial sites. KEPRI(Korea Electric Power Research Institute) accomplished the project that retrofitted analog control systems with the developed DCSs for boiler unit in middle-scale coal-fired thermal power plant. The benefits of an upgrade to digital control include a increase of reliability due to system redundancy, ease of modifying the control logic and the parameters of function block, ease of maintenance due to available spare parts, improvement of information display, ease of modifying MMI(Man Machine Interface) displays, a increase in system availability, and improvement of control performance. This paper describes how to use the parameters of existing analog controllers, the implementation of digital PID controller, control system configuration for boiler unit in thermal power plant, some boiler control loops, control result during commissioning, and the comparison of boiler characteristic test data after retrofitting with the existing test data.

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연탄 화력발전소 보일러에서 다탄종 연소가 슬래깅 발생에 미치는 영향 (The Effect of Multi-Coal Combustion on the Generation of Slagging in a Bituminous Coal-fired Power Plant Boiler)

  • 박지훈;유호선
    • 플랜트 저널
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    • 제18권1호
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    • pp.55-61
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    • 2022
  • 본 연구에서는 역청탄으로 설계된 870MW급 유연탄 화력발전소를 대상으로 발전기 출력, 연소조건, 통풍조건을 일정하게 유지하면서 역청탄과 아역청탄을 혼합하여 연소함에 따른 슬래깅 발생 영향을 분석하였으며, 이에 따른 보일러 성능에 영향을 주지 않는 허용 가능한 혼탄 방안을 제시하였다. 아역청탄의 혼합 비율을 10%, 20%, 40%, 60%, 80% 등으로 조정하여 원소분석, 공업분석, 회융점 변화, 슬래깅 지수 등을 확인하였고, 적정 혼탄 조건은 아역청탄은 40% 이하로 혼탄하고, 회의 산성분 대비 염기성분 비율은 0.4이하 또는 1이상, 총 알칼리는 3.5이하, 융점 슬래깅 지수는 1,345℃ 이상, 원소분석 시 회함량은 13% 이하, 공업분석 시 회함량은 15% 이하, 초기용융점은 최소 1,200℃ 이상이어야 바람직하다고 판단된다.

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