The gas flow behavior of short-contact cyclone reactor with different vane-guide locations was numerically simulated with the Reynolds stress model(RSM).The gas RTD(residence time distribution)in the reactor was studied by using the species transport equation.The effect of vane-guide location on residence time distribution

gas flow field and short-cut flow was investigated.The gas RTD curves at the catalyst outlet of different vane-guide locations were similar

while those of the mixed reaction zone had some deviation.A larger distance from vane-guide location to the inlet of reactor would cause a smaller gas tangential velocity in the mixed reaction zone and induce a larger tangential velocity and smaller quasi-free vortex in the separated reaction zone.Though a smaller distance from vane-guide location to the exhaust pipe inlet would cause weaker short-cut flow near the exhaust pipe inlet

which made it difficult for catalyst to be carried out from the exhaust pipe

it would amplify gas flow rotation intensity in the exhaust pipe which contributed to energy loss.