VOC strippers; How many trays

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Hydrocarbon Processing; (USA)

OSTI ID:6975997

Li, K Y; Hsias, K J ^[1]

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1. Lamar Univ., Beaumont, TX (US)

Air stripping is often used to remove volatile organic components (VOC) from water effluents. The stripping tower usually uses a packed bed because of its high efficiency. However, a tray tower sometimes is used because of its easier operation and maintenance, particularly when scaling problems inside the stripping tower are serious. One important step in designing a tray tower is to determine the number of trays for a required stripping separation. The procedure usually starts from a calculation of the number of ideal trays by using the Kremser equation. Then the number of nonideal trays is calculated from the number of ideal trays divided by the overall tray efficiency. This design calculation leaves the concentration distributions through the tower uncertain. Also, reliable values of the overall tray efficiency are difficult to obtain since tray efficiencies for various species and tray designs can differ. In this paper, design equations for the nonideal tray tower are developed based on a combination of the mass balance and the Murphree tray efficiency. Air stripping of chlorinated hydrocarbons from water are used as examples to demonstrate the calculations.

• OSTI ID: 6975997
• Journal Information: Hydrocarbon Processing; (USA), Journal Name: Hydrocarbon Processing; (USA) Vol. 69:2; ISSN HYPRA; ISSN 0018-8190
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
AROMATICS
CALCULATION METHODS
CHEMICAL EFFLUENTS
CHLORINATED AROMATIC HYDROCARBONS
DESIGN
DIRECT REACTIONS
HALOGENATED AROMATIC HYDROCARBONS
INDUSTRIAL PLANTS
NUCLEAR REACTIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PACKED BED
PETROLEUM REFINERIES
SEPARATION PROCESSES
STRIPPING
TRANSFER REACTIONS