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To investigate the influence of the air distribution in the down-fired boiler which adopts the multi-injection and multi-stage combustion technology, a 1:20 small-scale model of a down-fired pulverized-coal 35 MWe supercritical utility boiler was set up to study the gas–solid two-phase flow characteristics at different tertiary air ratios by using PDA (particle dynamics anemometer) measurement. Gas...
Measurements were taken for a 600-MWe wall-fired pulverized-coal utility boiler that was retrofitted with centrally fuel rich swirl coal combustion burners and two levels of OFA (over-fire air) technology. Using various swirl air vane angle settings a three-component particle-dynamics anemometer was used to measure flow characteristics in the near-OFA region in the laboratory together with gas temperature...
Gas/particle two-phase flow experiments at different over-fire air ratios were conducted using a 1:20 small-scale model of a down-fired 350 MWe superficial utility boiler designed with multiple injections and multiple staging combustion technology. The mean velocity, fluctuating velocity and particle volume flux were measured using particle dynamics anemometer measurements. None of four conditions...
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