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
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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
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