دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the vessel or tower in a gas plant in which fractionation occurs. See fractionate.

n: see fractionating column.

n: in distillation, the stream of products that condense above the fractionating column.

n: in the distillation process, that part of the condensed overhead stream that is returned to the fractionating column as a source of cooling. v: in distillation extraction of fluids from a core, to use a solvent to flow over a core sample a second time to clean it.

n: a tray, installed in an absorber tower or fractionating column, that is similar to a bubble-cap tray, except that it has only holes but no bubble caps through it. This type of tray is more efficient than the bubblecap tray or the valve tray and less expensive than either;however, it does not operate properly over a wide range of flow rates.

n: a tray installed in an absorber tower or fractionating column, similar to a bubble-cap tray except that the passageways permitting gas flow upward through the tray possess valves that reduce the size of the passages when the flow rate is reduced. Valve trays are more common than bubble-cap trays, because they are more efficient and less expensive.