Tests of a cyclone reactor for firing high-ash fuel

The influence of secondary air supply on the aerodynamics of a cyclone furnace reactor

“…Studies of the combustion of high ach coal in the prototype model of a four stage cyclone reactor have shown that flue gases emitted from it have a high con tent of ash particles [1]. The carryover of ash from the combustion chamber depends to a larger extent on the aerodynamics characterizing the motion of powdergas mixture in the reactor stages.…”

“…Figure 2 shows the scheme of velocity measure ments by means of pressure tubes in a horizontal sec tion. The secondary air swirling parameter is deter mined using formula (1). The tapping of static pres sure in a pressure tube has an essential effect on the results of tangential velocity measurements in swirled flows.…”

“…The tangen tial nozzles for supplying two phase mixture have the total relative cross section ϕ 1 = 21.7%. The swirling parameter and the total relative cross section of tan gential nozzles are determined from the formulas (1) where β is the tangential nozzle setting angle in the reactor's first stage, f in is the nozzle cross section area, and F m1 is the first stage area in the middle section of nozzles.…”