Apparatuses and methods for gas-solid separations using cyclones
AssigneeUop LLC
InventorSujay R. Krishnamurthy
Life of this patent
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Abstract
Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone comprises a barrel and a central hub disposed within the barrel to provide an annular section between the outer diameter of the central hub and the inner diameter of the barrel. Swirl vanes extend radially into the annular section. A shield is disposed at least partially within the annular section and at least partially within the swirl vanes. The shield radially divides the annular section into an inner annular portion and an outer annular portion.
Claims20
A cyclone for a gas-solid separator, the cyclone comprising:
- a barrel;
- a central hub disposed within the barrel to provide an annular section between the central hub and the barrel, the central hub having a contracting portion;
- swirl vanes extending radially into the annular section;
- and
- a shield disposed at least partially within the annular section and at least partially below the swirl vanes, the shield radially dividing the annular section into an inner annular portion and an outer annular portion, a top of the shield is axially disposed above the contracting portion of the central hub.
A gas-solid separator comprising an upper tube sheet, a lower tube sheet, and at least one cyclone extending through the tube sheets, the cyclone comprising an impure gas inlet at an upper end of a barrel above the upper tube sheet, a solid particle outlet at a lower end of the barrel between the upper tube sheet and the lower tube sheet, and a purified gas outlet below the lower tube sheet, wherein the cyclone further comprises:
- a barrel;
- a central hub disposed within the barrel to provide an annular section between the central hub and the barrel;
- swirl vanes extending radially into the annular section;
- and
- a shield disposed at least partially within the annular section and at least partially below the swirl vanes, the shield radially dividing the annular section into an inner annular portion and an outer annular portion and a top of the shield is axially disposed above a bottom of the central hub.
A cyclone for a gas-solid separator, the cyclone comprising:
- a barrel;
- a central hub disposed within the barrel to provide an annular section between the central hub and the barrel;
- swirl vanes extending radially into the annular section;
- and
- a shield disposed at least partially within the annular section and at least partially below the swirl vanes, the shield radially dividing the annular section into an inner annular portion and an outer annular portion, the shield being fixedly coupled to one or more bottom portions of the swirl vanes.
Dependencies are inferred from the claim text.