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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.
Yamamoto, Junya,Mori, Tatsuya,Hiramatsu, Mami,Akiyama, Yoko,Okada, Hidehiko,Hirota, Noriyuki,Matsuura, Hideki,Namba, Seitoku,Sekine, Tomokazu,Mishima, Fumihito,Nishijim, Sigehiro The Korea Institute of Applied Superconductivity a 2018 한국초전도저온공학회논문지 Vol.20 No.2
Removal of iron oxide scale from feed-water in thermal power plant can improve power generation efficiency. We have proposed a novel scale removal system utilizing High Gradient Magnetic Separation (HGMS). This system can be applied to high temperature and pressure area. We have conducted the lab-scale model experiments using ${\varphi}50mm$ filters and it demonstrated high removal efficiency in HGMS, but scale-up of the system is required toward practical use. In this study, we conducted a large scale mock-up HGMS experiment. We used the superconducting solenoidal magnet with ${\varphi}400mm$ bore and demonstrated that our HGMS system can achieve sufficient scale removal capacity that is required to introduce into both off-line and on-line system.
Junya Yamamoto,Tatsuya Mori,Mami Hiramatsu,Yoko AKIYAMA,Hidehiko Okada,Noriyuki Hirota,Hideki Matsuura,Seitoku Namba,Tomokazu Sekine,Fumihito Mishima,Sigehiro Nishijima 한국초전도.저온공학회 2018 한국초전도저온공학회논문지 Vol.20 No.2
Removal of iron oxide scale from feed-water in thermal power plant can improve power generation efficiency. We have proposed a novel scale removal system utilizing High Gradient Magnetic Separation (HGMS). This system can be applied to high temperature and pressure area. We have conducted the lab-scale model experiments using φ50 mm filters and it demonstrated high removal efficiency in HGMS, but scale-up of the system is required toward practical use. In this study, we conducted a large scale mock-up HGMS experiment. We used the superconducting solenoidal magnet with φ400 mm bore and demonstrated that our HGMS system can achieve sufficient scale removal capacity that is required to introduce into both off-line and on-line system.
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.