Abstract
Experiments are conducted on the steam gasification of Borodino coal in a two-chamber gas generator. The generator is based on a circulating fluidized bed with damping of gas motion by the packing. The mean size of the coal particles is 0.2 mm. Heat from the combustion chamber is sent to the gasification chamber by the circulation of a disperse powder (electrocorundum) between the chambers. The chambers are filled with spherical packing (diameter 50 mm, porosity 0.5). The size of the electrocorundum particles is 0.3 mm. The heat of combustion of the gasification products is 8195 kJ/m3. The unburned residue is 5% in chemical terms and 2% in mechanical terms. The model proposed for the gas generator consists of one heat-balance equation each for the combustion and gasification chambers. The model is consistent with the experimental data. On the basis of the model, the optimal generator parameters are found: temperature 900°C in the gasification chamber and 1020°C in the combustion chamber; proportion of coal sent to the gasification chamber 36%; chemical efficiency 40%.
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References
Hoffman, E.J., Coal Conversion, Chichester: Wiley, 1979.
Korchevoi, Yu.P., Maistrenko, A.B., and Topal, A.I., Ekologicheski chistye ugol’nye energotekhnologii (Ecologically Clean Coal Energy Technologies), Kiev: Nauchnaya Mysl’, 2004.
Tabakaev, R.B., Kazakov, A.V., and Zavorin, A.S., Prospective heat engineering use of low-grade fuels from Tomsk oblast, Izv. Tomsk. Politekh. Univ., 2013, vol. 323, no. 4, pp. 41–46.
Combined Cycle Systems for Near-Zero Emission Power Generation, Rao, A., Ed., Cambridge: Woodhead, 2012.
Khan, J. and Wang, T., Implementation of demoisturiration and devolatization model in multiphase simulation of hybrid entrained and fluidized bed mild qasifier, Int. J. Clean Coal Energy, 2013, no. 2, pp. 35–53.
Zagrutdinov, R.Sh., Nagornov, A.N., and Senchin, P.K., Setting testing of Lurgi gasifiers and prospective use of gasifier technologies, Polzunovskii Vestn., 2007, no. 3, pp. 40–47.
Dubinin, A.M., Tuponogov, V.G., and Filippov, D.V., Optimization of steam gasification process of coal in a fluidized bed, Energosberezhenie Vodopodgotovka, 2008, no. 4 (54), pp. 60–62.
Munts, V.A., Baskakov, A.P., and Ashikhmin, A.A., Gas formation from a solid fuel burning in a fluidized bed, J. Eng. Phys., 1988, vol. 54, no. 3, pp. 296–300.
Baskakov, A.P., Matsnev, V.V., and Raspopov, I.V., Kotly i topki s kipyashchim sloem (Boilers and Furnaces with Fluidized Bed), Moscow: Energoizdat, 1996.
Dubinin, A.M., Kagarmanov, G.R., and Obozhin, O.A., Simulation of the steam gasification of coals, Solid Fuel Chem., 2012, vol. 46, no. 3, pp. 168–171.
Zhukhovitskii, A.A. and Shvartsman, L.A., Fizicheskaya khimiya: uchebnik dlya studentov vuzov (Physical Chemistry: Manual for Higher Education Students), Moscow: Metallurgiya, 2001.
Putrova, E.E., Svirida, L.V., and Fedoseev, S.D., On the distribution of the concentration of CO2 and H2O at height of the reaction zone of gasifier in isothermal conditions, Khim. Tverd. Topliva, 1982, no. 2, pp. 94–96.
Zhorov, Yu.M., Termodinamika khimicheskikh protsessov. Neftekhimicheskii sintez, pererabotka nefti, uglya i prirodnogo gaza (Thermodynamics of Chemical Processes. Petrochemical Synthesis, Refining of Oil, Coal, and Natural Gas), Moscow: Khimiya, 1985.
Vilenskii, T.V. and Khzmalyan, D.M., Dinamika goreniya pylevidnogo topliva (Dynamics of the Pulverized Fuel Combustion), Moscow: Energiya, 1978.
Baskakov, A.P., Berg, B.V., Vitt, O.K., et al., Teplotekhnika: uchebnik dlya vuzov (Heat Engineering: Manual for Higher Education Institutions), Baskakov, A.P., Ed., Moscow: Bastet, 2010, 3 ed.
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Original Russian Text © A.M. Dubinin, S.P. Mavrin, 2016, published in Izvestiya Vysshikh Uchebnykh Zavedenii, Chernaya Metallurgiya, 2016, No. 11, pp. 773–780.
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Dubinin, A.M., Mavrin, S.P. Coal gasification in a system with a damped circulating fluidized bed. Steel Transl. 46, 764–770 (2016). https://doi.org/10.3103/S096709121611005X
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DOI: https://doi.org/10.3103/S096709121611005X