Patent ID: 6238514
Filing Date: 2001-05-29
Classification: B01D,C23C,H01J,Y02C,Y10S

Abstract:
Trap apparatus for removing a condensable constituent from a gaseous flow, comprising:a housing enclosing a trap chamber, said housing having an upstream end wall with an inlet opening and a downstream end wall with an outlet opening;an annular outer trapping medium positioned in the trap chamber and spaced radially outward from the inlet opening;an inner screen column extending from a lower end at the downstream end wall upwardly into the trap chamber toward, but not all the way to, the upstream end wall such that the inner screen terminates at an upper end spaced axially downstream from the inlet opening, said inner screen column being spaced radially inward from the outer trapping medium and surrounding an inner core space that is open at said upper end such that there is an annular space between the inner screen column and the annular outer trapping medium;a core trapping medium disposed in the inner core and extending upwardly toward, but not all the way to, the upper end of the inner screen column; andan intermediate trapping medium disposed in the annular space between the inner screen column and the outer trapping medium and extending upwardly toward, but not all the way to, the upper end of the inner screen column.