000			01706nab a2200205 4500
005			20260520000838.0
008			260224s2009 xxu
245	0	0	_aExperimental investigations into gas/particle flows in a down-fired boiler _bInfluence of down-draft secondary air
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a9 p. ; 5846-5854
520			_aTranscripción del resumen del autor. Down-fired boiler operations suffer problems of high carbon content in the fly ash. This is because horizontally fed secondary air restrains the fuel-rich flow from penetrating into the lower levels of the furnace. Experiments were conducted on a small-scaled furnace for a down-fired pulverized-coal 300 MWe utility boiler on a gas/solid two-phase test facility. Modifications to the furnace permitted secondary air to be directed downward giving five different F-tier secondary air angle settings. Investigations at various settings were performed to obtain distributions of the mean velocity, root-mean-square (rms) fluctuation velocity, particle size, particle volume flux, and particle number concentration within the furnace. Results show that, with increasing angle settings, greater depths were attained for both air and particles within the furnace and slip velocities also increased between air and particles. At a 25° angle setting, the particle residence time in the furnace can be increased, while slagging within the furnace hopper can be avoided.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aLi, Zhengqi _938132
100	1		_aRen, Feng _938131
100	1		_aChen, Zhichao _942358
999			_c170827 _d170827