Theoretical study of gasification of fine brown coal dust from Mokrokalygorsk deposit in a vertical entrained flow gasifier under pressure of 4.2 MPa

• Datum: 2016
• Автори та афіліації: B. Rokhman — Coal Energy Technology Institute NAS of Ukraine; V. Vyfatniuk — SPKTB "Energomashproekt"; D. Vyfatniuk — SPKTB "Energomashproekt"; A. Kvasnevskyi — The Gas Institute, NASU
• Ключові слова: keywords
• Hauptverfasser: Rokhman, B., Vyfatniuk, V., Vyfatniuk, D., Kvasnevskyi, A.
• Format: Artikel
• Sprache: Russisch
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2016
• Schlagworte: steam-oxygen gasification; reactor; coal pyrolysis; model; syngas; particle
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/102
• Назва журналу: Vidnovluvana energetika

An effective and practical solution of the displacement problem of the expensive imported natural gas from the chemicals production (ammonia, methanol, acetic acid and so on) is its replacement by synthetic gas from steam-oxygen gasification of solid fuels (brown or black coal, bio-energy resources) in a high-temperature flow under pressure. To achieve this, a model of thedust particles gasification in high-temperature flow was constructed. With the help of this model detailed information about the Mokrokalygorsk deposit brown coal gasification parametersrequired for the construction of pilot and industrial units was received. It is shown that the slag temperature exceeds the liquidity of ash, so the molten slag is formed on the entire innersurface of the gasifier. To protect the screen of the gasifier from heat radiation is proposed to use a two-layer construction of shotcrete. Refractory materials are selected for each of the layers. The optimum operating parameters (flow ratio O2/coal and H2O/coal) were found providing the content of combustibles in the syngas − 88-92%, ballast − 3,7−6,7%, the degree of carbon conversion − 99.9% and the calorie gas − 11 MJ/Nm3.