OPTIMAL PARAMETERS OF THE STEAM COAL GASIFICATION IN THE GASIFIER WITH DAMPED CIRCULATING FLUIDIZED BED
https://doi.org/10.17073/0368-0797-2016-11-773-780
Abstract
The authors have made several experiments of Borodino coal steam gasifi cation in a two-chamber gasifi er with a circulating fl uidized bed damped by the checker. In one of the two chambers the coal was burnt with excess air coeffi cient of 1.25, in another the coal was gasifi ed by steam. Average size of coal pieces was 0.2 mm. The heat acted from the combustion chamber into the gasifi cation chamber through the particulate coolant circulation (fused 0.3 mm) between the chambers. The chambers were fi lled with spherical jets with diameter of 50 mm and porosity of 0.5; electrocorundum particle size was 0.3 mm. Calorifi c value was 8195 kJ/m3. Mechanical underburning was 2 %. Chemical underburning was 5 %. The model of the gasifi er consisting of a system of two equations of thermal balance of the combustion chambers and gasifi cation satisfactorily describes the experiment. The optimum parameters of the gasifi er were found based on the model: the temperature in the gasifi cation chamber – 900 °C, the temperature in the combustion chamber – 1020 °C, the share of coal supplied to the gasifi cation chamber – 0.36, chemical effi ciency – 40 %.
About the Authors
A. M. Dubinin
Ural Federal University named after the fi rst President of Russia B.N. Yeltsin
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Thermal Power and Heat Engineering”,
Ekaterinburg
S. P. Mavrin
Ural Federal University named after the fi rst President of Russia B.N. Yeltsin
Russian Federation
Russian Federation
Head of the Laboratory,
Ekaterinburg
References
1. Hoff man E.J. Coal conversion. Laramie, Wyoming, 1980. (Russ. ed.: Hoff man E.J. Energotekhnologicheskoe ispol’zovanie uglya. Moscow: Energoatomizdat, 1983, 328 p.).
2. Korchevoi Yu.P., Maistrenko A.B., Topal A.I. Ekologicheski chistye ugol’nye energotekhnologii [Clean coal energy technologies]. Kiev: Nauchnaya mysl’, 2004, 187 p. (In Russ.).
3. Tabakaev R.B., Kazakov A.V., Zavorin A.S. Prospect of lowgrade fuels of the Tomsk region for heat engineering use. Izvestiya Tomskogo politekhnicheskogo universiteta. 2013, vol. 323, no. 4, pp. 41–46. (In Russ.).
4. Combined Cycle Systems for Near-Zero Emission Power Generation. Ashok Rao ed. Woodhead Publishing. 2012, 360 p.
5. Khan J., Wang T. Implementation of demoisturiration and devolatization model in multi – phase simulation of hubrid entrained and fluidized bed mild qasifier. International Jornal of Clean Coal and Energy. 2013, no. 2, pp. 35–53.
6. Zagrutdinov R.Sh., Nagornov A.N., Senchin P.K. Setting testing of Lurgi gasifiers and prospects of gasifier technologies. Polzunovskii vestnik. 2007, no. 3, pp. 40–47. (In Russ.).
7. Dubinin A.M., Tuponogov V.G., Filippov D.V. Optimization of steam gasifi cation process of coal in a fluidized bed. Energosberezhenie i vodopodgotovka. 2008, no. 4 (54), pp. 60–62. (In Russ.).
8. Munts V.A., Baskakov A.P., Ashikhmin A.A. Gas formation from a solid fuel burning in a fluidized bed. Journal of Engineering Physics. 1988, vol. 54, no. 3, pp. 296-300.
9. Baskakov A.P., Matsnev V.V., Raspopov I.V. Kotly i topki s kipyashchim sloem [Boilers and furnaces with fluidized bed]. Moscow: Energoizdat. 1996, 352 p. (In Russ.).
10. Dubinin A.M., Kagarmanov G.R., Obozhin O.A. Simulation of the steam gasification of coals. Solid Fuel Chemistry. 2012, vol. 46, no. 3, pp. 168–171.
11. Zhukhovitskii A.A., Shvartsman L.A. Fizicheskaya khimiya: Uchebnik dlya studentov vuzov [Physical chemistry: Textbook for university students]. Moscow: Metallurgiya, 2001, 688 p. (In Russ.).
12. Putrova E.E., Svirida L.V., Fedoseev S.D. On the distribution of the concentration of CO2 and H2 O at height of the reaction zone of gasifier in isothermal conditions. Khimiya tverdogo topliva. 1982, no. 2, pp. 94–96. (In Russ.).
13. 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, 464 p. (In Russ.).
14. Vilenskii T.V., Khzmalyan D.M. Dinamika goreniya pylevidnogo topliva [Dynamics of the pulverized fuel combustion]. Moscow: Energiya, 1978, 248 p. (In Russ.).
15. Baskakov A.P., Berg B.V., Vitt O.K. etc. Teplotekhnika: Uchebnik dlya vuzov [Heat engineering: Textbook for universities]. Baskakov A.P. ed. Moscow: ID Bastet, 2010, 328 p. (In Russ.).
Review
For citations:
Dubinin A.M., Mavrin S.P. OPTIMAL PARAMETERS OF THE STEAM COAL GASIFICATION IN THE GASIFIER WITH DAMPED CIRCULATING FLUIDIZED BED. Izvestiya. Ferrous Metallurgy. 2016;59(11):773-780. (In Russ.) https://doi.org/10.17073/0368-0797-2016-11-773-780
Views:
700
Email this article 