METHOD FOR CLEAN-UP OF PARTICULATE-CONTAINING GASES

摘要

A process fox the clean-up of particulate containing gases is provided wherein a difference in pressures between the pressure of particulate-containing gases in the inlet to cyclone separation means and the pressure in an underflow exit is maintained and controlled. In a preferred embodiment, the particulate-containing gases comprise flue gas from a catalyst regeneration process comprising two separate regeneration zones comprising a low temperature regeneration zone followed by a higher temperature regeneration zone. A CO rich flue gas is recovered from the low temperature regeneration zone and a CO2 rich flue gas is recovered from the higher temperature regeneration zone. The high temperature CO2 rich flue gas is passed through a heat exchanger to produce steam and cool the CO2 rich flue gas. The cooled CO2 rich flue gas is passed through cyclone separators to capture catalyst particles. The particle containing cooled gas is separated according to this invention in two zones maintained at a desired pressure differential and so that the volume of underflow gas moving with the separated catalyst fines is limited.