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

Yoko Akiyama,Suqin Li,Koshiro Akiyama,Tatsuya Mori,Hidehiko Okada,Noriyuki Hirota,Tsuyoshi Yamaji,Hideki Matsuura,Seitoku Namba,Tomokazu Sekine,Fumihito Mishima,Shigehiro Nishijima 한국초전도저온공학회 2021 초전도와 저온공학 Vol.23 No.3

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.

석탄화력발전대비 LNG복합화력발전 환경성 및 경제성비용분석에 관한 연구

김종원 강원대학교 경영경제연구소 2018 Asia-Pacific Journal of Business Vol.9 No.4

This study is about comparing coal thermal plant to LNG combined power plant in respect ofenvironmental and economic cost analysis. In addition sensitive analysis of power cost anddiscount rate is conducted to compare the result of change in endogenous and exogenousvariable. For environmental assessment, when they generate 10,669GWh yearly, coal thermalpower plant emits sulfur oxides 959ton, nitrogen oxide 690ton, particulate matter 168ton andLNG combined power plant emits only nitrogen oxide 886ton respectively every year. Regarding economic cost analysis on both power plants during persisting period 30 years, coalthermal power plant is more cost effective 4,751 billion won than LNG combined taking inaccount the initial, operational, energy and environmental cost at 10,669GWh yearly in spiteof only LNG combined power plant’s energy cost higher than coal thermal. In case ofsensitive analysis of power cost and discount rate, as 1% rise or drop in power cost, the totalcost of coal thermal power plant increases or decreases 81 billion won and LNG combined157 billion won up or down respectively. When discount rate 1% higher, the cost of coalthermal and LNG combined power plant decrease 498 billion won and 539 billion won foreach. When discount rate 1% lower, the cost of both power plant increase 539 billion wonand 837 billion won. With comparing each result of change in power cost and discount rate,as discount rate is weigher than power cost, which means most influential variable of powerplan is discount rate one of exogenous variables not endogenous.

Comparison of the Future Power Plants Competitiveness in Thailand Utilizing MARKAL Model

Artite Pattanapongchai,Bundit Limmeechokchai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

The paper describes the application of MARKAL (MARKet Allocation) for comparing economic parameters of the future power plant Thailand between the combined cycle natural gas fired plants and nuclear power plants, which the first plant is planned to be built in 2020. All calculations for demand technologies in this study cover a time frame of 25 years from 2006 to 2030, which are grouped into 12 periods with each further divided into 8 time-divisions accounting for the 4 seasons and the daytime/nighttime. MARKAL simulation model have been chosen because of their adaptability to this specific task. The input data for calculation are cost elements, which are defined within the frame of set limits of expected occurrence given a probability distribution within the limits. The method is applied to determine competitive specific investment costs of power plants which are planned to be built in the future. The main candidates are combined cycle gas fired plants and nuclear power plants, which the first nuclear power plant is planned to be built in 2020 with the starting electricity production capacity of 1,800 MW then the production capacity is planned to be increased to 3,600 MW in 2021. All information about the plan for future power plants are cited from power developing plan 2007 (PDP 2007) by the Electricity Generating Authority of Thailand (EGAT). This paper summarizes the programming and calculating methodology, and presents selected results of cost analysis of the performance and costs between the types of power plants. Performed analysis shows that future competitive nuclear power plant is cost competitive with other forms of electricity generation except where there is direct access to low-cost fossil fuels. Comparing costs for nuclear power plants with other types of power plants, fuel cost only accounts for a minor portion of total generating cost; however, the capital costs for nuclear power plants are much greater than those for thermal plants. A discount rate of 10% is selected as most appropriate for analysis of the long-term technological choices. The Thai MARKAL energy systems model has been used to investigate long-term planning in the electricity generation options. A range of power sector specific parametric sensitivities have been performed to provide a systematic exploration of least-cost energy system configurations under integrated set of input assumptions. The results of the MARKAL model are used to develop selected scenario in future developments of reference energy system. The study also considers the potential of Clean Development Mechanism (CDM) in Thailand by comparing the avoid cost of CO2 corresponding to nuclear power plant scenario. As a result, optimal scenario of generation expansion can be developed for Thailand electrical system.

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 The Korean Society of Superconductivity and Cryoge 2021 한국초전도저온공학회논문지 Vol.23 No.3

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.

스토리 뷰잉(Story-viewing)을 적용한 화력발전분야 안전교육 콘텐츠 연구

김유식,민설희,성윤학,박영제 한국화재소방학회 2016 한국화재소방학회논문지 Vol.30 No.3

There have been happening small and big fires due to the various causes in the thermal power plants which are the highrisk buildings with the high possibility of big sizes of accidents, so the people in the power plants distribute the workers“the site action manuals in thermal power plants” and try to minimize the rate of disasters like fires through the regulareducation and training. However, in the Five Thermal Power Plants in Korea, there are no the standard of “the site actionmanuals” and Furthermore, the present educational manuals are mostly the hard copies with poor readability. So the standardizationof the manuals are definitely needed. Therefore, in this research, we proceed the standardization of the manualsfor the five areas of the site action manual s in the thermal power plants which are oil fires, electric fires, buildingfires, facility fires and gas leaking reaction SOP to improve the reaction power on the disasters in the power plants whichare the national significant infrastructures, thus by using the manual, we propose the safety education contents for thethermal power plants based on the visualization technology using story-viewing method to complement the hard copytype disaster manuals. 화력발전소는 중대형사고의 발생위험이 높은 고위험군 건물로 다양한 원인에 의하여 크고 작은 화재 등이 발생하고 있어 화력발전소 현장에서는 ‘화력발전분야 현장조치 행동 매뉴얼’을 배포하고 정기적인 교육 및 훈련을 통하여 화재 등재난발생률을 최소화하기 위하여 힘쓰고 있다. 그러나 현재 국내 5개 화력발전회사에서 사용되는 교육자료는 대부분 가독성 낮은 인쇄물(Hard Capy) 형태이며, 발전화사별, 사업소별로 상이하게 구성된 점이 있어 표준화 작업이 요구된다. 그러므로 본 연구에서는 국가 중대 기반시설인 발전소의 재난대응력을 향상하기 위한 방법으로 ‘화력발전분야 현장조치행동 매뉴얼’의 ‘유류화재 · 전기화재 · 건물화재 · 설비화재 · 가스누출 대응 SOP’ 5개 부분에 대하여 매뉴얼 표준화작업을 진행하고, 이를 바탕으로 인쇄물(Hard Capy)형 재난매뉴얼을 보완할 수 있는, 스토리뷰잉(Story-viewing) 기법을적용한 시각화 기반 화력발전분야 안전교육 콘텐츠를 제안하고자 한다.

대규모 태양열발전과 화력발전의 비교 고찰

김종규(Kim Jong-Kyu),강용혁(Kang Yong-Heack),김진수(Kim Jin-Su),이상남(Lee Sang-Nam),유창균(Yu Chang-Kyun),조덕기(Jo Dok-Ki) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-

Large scale electric power generation in the field of renewable energy is the Solar Power Plant (SPP). However, till now, solar concentrating technologies are the main research field in the SPP. Therefore, it is necessary to look into the power generation part to prepare the era of renewable energy. This paper compares the Solar Power Plant and the Thermal Power Plant (TPP) as an electric power generator. In order to do so, some characteristics such as the plant system, steam condition, and electric power generation capacity are described for the SPP and TPP based on the large scale power plant. In addition, the integration of the SPP with the TPP for the application and prospect of the SPP are noted.

마산화력발전소의 건설 과정과 매연[飛灰] 문제

정대훈 한국사연구회 2023 한국사연구 Vol.- No.201

With the construction of thermal power plants with a total capacity of 100,000 kW in Masan, Dangin-ri, and Samcheok in 1956, Korea’s electricity shortage was largely resolved. The Masan Thermal Power Plant, which was the largest scale among them in terms of scale, used domestic anthracite coal as fuel for power generation, contrary to the original plan. This was a reflection of the Korean government’s intention to reduce the cost of importing bituminous coal for power generation. Since the 1940s, it has been pointed out that domestic anthracite is not suitable for power generation due to its low quality, but this was not taken seriously due to the need to secure power immediately. As a result, the problem of air pollution(fly ash) emerged from the beginning of operation of the Masan power plant. Residents near the power plant suffered greatly, but the government was lukewarm in solving the problem. The Masan Power Plant contributed greatly to relieving Korea’s power shortage, but the social costs of power generation had to be borne by the residents of an underdeveloped area in Masan.

화력발전소 온배수열 활용 시설하우스 열공급에 대한 환경 및 사회적 가치 인식 비교 분석

김가희 ( Kim Ga-hee ),안차수 ( Ahn Cha-soo ),엄병환 ( Um Byung-hwan ) 한국농공학회 2018 한국농공학회논문집 Vol.60 No.5

Recently, interest in alternative energy has been increasing to reduce greenhouse gas emissions and fossil fuel consumption in accordance with the United Nations Framework Convention on Climate Change(UNFCCC). Accordingly, there is a need to use waste heat that unused throughout industrial systems for lowering the concentration of energy on fossil fuels. In particular, government support projects for the energy recycling of agriculture and fisheries such as cultivation of tropical crops and aquaculture are being actively carried out by utilizing waste heat and thermal effluents caused from large-scale industrial complexes including power plants. The study was conducted on supplier (power plant), consumer (farmer) and stakeholders (constructor and local governments) of domestic demonstration areas using waste heat that is abandoned from the power plant in the form of thermal effluents. It investigated the overall improvement and feasibility of government funded projects through field interviews and questionnaire-type surveys. The results of this study are expected to provide basic directions for the operation of the project in terms of nationwide expansion and diffusion of the heat source supply project at horticultural greenhouse by utilizing the thermal effluents from power plant.

500 MW 화력발전소 고압 증기 배관 손상 원인 분석

김정면,정남근,양경현,박민규,이재홍,Kim, Jeongmyun,Jeong, Namgeun,Yang, Kyeonghyun,Park, Mingyu,Lee, Jaehong 한국전력공사 2019 KEPCO Journal on electric power and energy Vol.5 No.4

500 MW 표준 석탄화력발전소는 국내에서 가장 큰 용량의 규격화된 발전소로써 20년 넘게 국내 전력생산에 중추적인 역할을 수행하고 있다. 장기간 사용으로 인한 경년 열화와 더불어 최근 석탄화력발전소의 대기오염 문제가 대두되면서 석탄화력발전소 가동률 제한 정책에 따른 잦은 기동·정지에 의해 발전 설비의 고장 확률이 증가하고 있다. 그 중 증기 배관은 보일러에서 만들어진 고온·고압의 증기를 전력생산을 위해 터빈으로 이송시키는 중요한 역할을 하는 설비로 최근 국내 대용량 발전소 증기 배관의 고장 사례가 빈번하게 발생하고 있다. 이에 본 연구에서는 국내 500 MW 표준 석탄화력발전소 주증기배관 연결 용접부에 반복적으로 발생된 손상에 대해 손상 해석을 수행하였다. 동일 규격의 타 발전소에서 발생될 수 있는 고장의 사전 예방을 위해 균열부 금속 조직 분석과 배관 응력 해석을 통해 배관 지지 구조에 의한 고 응력에 의해 발생된 원인을 규명하고 고 응력부 응력 저감을 위한 지지 구조 개선 방안을 제시하였다. The 500 MW Korean standard coal-fired power plant is the largest standardized power plant in Korea and has played a pivotal role in domestic power generation for over 20 years. In addition to the aging degradation due to long term operation, the probability of failure of power generation facilities is increasing due to frequent startup and stop caused by the lower utilization rate due to air pollution problem caused by coal-fired power plants. Among them, steam piping plays an important role in transferring high-temperature & pressure steam produced in a boiler to turbine for power generation. In recent years, failure of steam piping of large coal-fired power plant has frequently occurred. Therefore, in this study, failure analysis of high pressure piping weld was conducted. We identify the damage caused by high stress due to abnormal supporting structure of the piping and suggest improved supporting structure to eliminate high stress through microstructure analysis and piping stress analysis to prevent the occurrence of the similar failure of other power plant in the case of repetitive damage to the main steam piping system of the 500 MW Korean standard coal-fired power plant.

Research and Design of Coal PLC Control System in Coal-fired Power Plants

Yuheng Yin,Zhongzhe Yue 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.1

Coal handling system in thermal power plant is the important component of the auxiliary system of power plant, it takes on the power plant's power to produce fuel supply missions with other corresponding mechanical and electrical equipments. During the operation of thermal power plants, the improvement of working efficiency of coal handling system is the key factor to improve the work efficiency of the whole power plant, the whole process of remote monitoring of coal is also put forward higher requirements on the design of automatic control system, so we choose the most widely used PLC control system in coal handling system, it makes the dream a reality.