Harold J Rafson

US Patent:

43080405, Dec 29, 1981

Filed:

Feb 20, 1981

Appl. No.:

6/236540

Inventors:

Harold J. Rafson - Highland Park IL
Egbert deVries - Kettering OH

Assignee:

Quad Environmental Technologies Corp. - Highland Park IL

International Classification:

B01D 4706

US Classification:

55238

Abstract:

Apparatus, particularly adapted to the removal of odorous constituents from waste gas streams, is described. The apparatus comprises a treatment vessel or chamber preferably of cylindrical shape containing a coaxially-mounted exhaust duct which serves also as a columnar support for the chamber top or roof. An odorous gas is introduced tangentially into an upper portion of the reactor and is caused to move in a spiral flow around the central column and to exahust through an exit port into the central duct adjacent the chamber floor. An arcuate, spiral baffle is mounted on the chamber floor and extends continuously from the inner vessel wall to the central duct thereby directing gas flow into the exit port to reduce pressure drop through the treatment chamber. A finely divided spray of a reagent reactive toward the odorous compound is introduced into the chamber through nozzles ringing the chamber wall or mounted in the chamber roof. Reagent droplets coalesce on the chamber floor and are removed from the vessel.

US Patent:

48634956, Sep 5, 1989

Filed:

Feb 11, 1988

Appl. No.:

7/154879

Inventors:

Harold J. Rafson - Highland Park IL

Assignee:

QUAD Environmental Technologies Corp. - Northbrook IL

International Classification:

B01D 4700

US Classification:

55 85

Abstract:

Volatile organic compounds including hydrocarbons, halogenated compounds and other hazardous and toxic chemicals are removed from air streams by contacting the air with a suspension of tiny water droplets sized such that the droplets have an internal pressure significantly greater than atmospheric. The solubility of organic compounds in water droplets and their rate of transfer from an air stream to the droplets increases rapidly as the droplet internal pressure rises. After substantial transfer of volatile organic compounds from the air into the droplets is accomplished, the droplets are separated from the air stream and the resulting liquid effluent is disposed of in a manner which prevents escape of contained contaminant compounds.

US Patent:

52562085, Oct 26, 1993

Filed:

Oct 1, 1991

Appl. No.:

7/769829

Inventors:

Harold J. Rafson - Highland Park IL

International Classification:

B08B 300

US Classification:

134 251

Abstract:

Volatile organic compounds and other volatile contaminants are removed from soils and granular solids by contacting the soil with steam at superatmospheric pressure and thereafter rapidly reducing the pressure by flashing off steam and vaporized contaminants leaving a cleaned soil product. The steam fraction containing the contaminant compounds is condensed and the contaminants can then be separated from the water for recovery or disposal.

US Patent:

43022260, Nov 24, 1981

Filed:

Dec 14, 1979

Appl. No.:

6/103321

Inventors:

Harold J. Rafson - Highland Park IL
Egbert deVries - Kettering OH

Assignee:

Quad Environmental Technologies Corp. - Highland Park IL

International Classification:

B01D 4706

US Classification:

55238

Abstract:

Apparatus, particularly adapted to the removal of odorous constituents from waste gas streams, is described. The apparatus comprises a treatment vessel or chamber preferably of cylindrical shape containing a coaxially-mounted exhaust duct which serves also as a columnar support for the chamber top or roof. As odorous gas is introduced tangentially into an upper portion of the reactor and is caused to move in a spiral flow around the central column. A finely-divided spray of a reagent reactive toward the odorous compound is introduced into the chamber through nozzles ringing the chamber wall or mounted in the chamber roof. Reagent droplets coalesce on the chamber floor and are removed from the vessel. The treated gas exhausts up the central duct through openings located near the bottom thereof.

US Patent:

50173510, May 21, 1991

Filed:

Jul 21, 1989

Appl. No.:

7/383357

Inventors:

Harold J. Rafson - Highland Park IL

International Classification:

B01J 800

US Classification:

4232452

Abstract:

Volatile organic compounds including hydrocarbons, halogenated compounds and other hazardous and toxic chemicals are removed from air streams by contacting the air with a suspension of tiny aqueous droplets sized such that the droplets have an internal pressure significantly greater than atmospheric. The capacity of aqueous droplets to hold organic compounds and the rate of transfer of organic compounds from an air stream to the droplets increase rapidly as the droplet size decreases and the droplet internal pressure rises. After substantial transfer of volatile organic compounds from the air into the droplets is accomplished, the droplets are caused to grow and to coalesce and are separated from the air stream. The resulting liquid effluent is disposed of in a manner which prevents escape of contained contaminant compounds.