OP-II-3

KN-3THE MECHANISM OF NANOCLUSTER COMBUSTIONOF NON-STANDARD FUEL AND APPROPRIATE FURNACE UNITAlekseenko S.V. 1,2 , Paschenko S.E. 2 , and Salomatov V.V. 1,21 Institute of Thermophysics SB RAS, Novosibirsk, RussiaE-mail: vvs@itp.nsc.ru2 Novosibirsk State University, Novosibirsk, RussiaE-mail: Pashenko-ecolog@yandex.ruThe non-renewable hydrocarbon energy-carriers are the basis of the world fuelresource. However, the problem of fuel supply is relatively urgent because offorthcoming exhaust of convenient and available gaseous and liquid energy-carriersof a high quality. Under these conditions numerous available off-grade fuels andcombustible man-made wastes are still out of use. These large-tonnage off-gradefuels and wastes include: water-coal sludge of coal-concentrating and coal-miningplants; waste motor oils, lubricants, contaminated mazuts, non-utilized products of oilprocessing (oil sludge, tars), and other combustible materials. The main reason forinsufficiently useful utilization of these waste combustibles is a lack of modern highefficientfurnace units for such fuels.We have suggested a new method for combustion of hydrocarbon-bearing offgradeliquid fuels [1]. The feature of this method is separate supply of two flows intothe combustion chamber: fuel+air and superheated steam. The initial flame is generatedat off-grade fuel combustion under the conditions of partial or total blocking of air(oxidizer) supply. As a result, the aerosol soot flame with the given particleparameters is formed at the initial stage in the combustion chamber. Then, thesecondary flame is formed due to a pulse of superheated steam. In our opinion, inthis secondary flame catalytic decomposition of steam molecules occurs on clustersof soot nanoparticles. This leads to conditions required for efficient ignition of “heavy”fuels and their stable combustion.The series of standard evaluation burners with the power of 5 – 20 kW was madeon the basis of this physical-chemical mechanism. The experimental 20-kW burner isshown in Fig.1. Stainless steel burner shell 1 is made of the welded co-axial rings,where distilled water is fed in-between them through hole 2. The evaporating andsteam-superheating surfaces of the mini steam generator are imbedded in the sameplace. Liquid fuel from the fuel tank is fed into a metal tray by gravity through fitting 4,connected from beneath to the burner shell. Superheated steam produced in the ministeam generator passes through steam pipeline 8 to nozzle block 3.26