Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1990-09-25
1991-12-31
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
134 11, 134 31, 134 40, 134105, 202170, F26B 2106
Patent
active
050759825
ABSTRACT:
A vapor degreasing open topped defluxer is disclosed in which cleaning solvent vapors are generated by boiling a liquid solvent in an open topped tank with the parts to be cleaned inserted therein through the open top. The open topped tank is formed from plural upright sidewalls connected to a bottom wall. Heating elements disposed in the tank bottom vaporize the solvent such that the generated heated solvent vapors rise above the liquid solvent to contact the parts to be cleaned and dissolve the grease on the parts. A condenser coil supported within the tank above the liquid solvent condenses the solvent vapors and defines an upper limit or vapor line of the solvent vapor zone located above the liquid solvent and below uppermost edges of the upright sidewalls. The light rising solvent vapors have a natural tendency to rise upwardly out of the tank by following a convection flow path generally along the inner surfaces of the sidewalls and upwardly past the uppermost edges thereof. To control the expulsion of vapors into the surrounding ambient environment, the uppermost edges are formed with a downwardly and inwardly turned lip coextensive with the length and width of the tank. The lip intercepts the convection flow path to deflect the light rising vapors both inwardly and downwardly back towards the condenser coil. The invention also discloses a removably attachable tank extension which may be attached to the existing tank sidewalls to increase the freeboard height of the tank. The uppermost edges of both the existing tank sidewalls and the tank extension sidewalls may be formed with a downwardly and inwardly turned lip to intercept the convection flow path. The tank extension may be pinned and thereby secured to the existing tank sidewalls at various elevations to optimize the freeboard height as a function of the boiling temperature of the solvent being used.
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Godlewski Thomas W.
Rodgers, Sr. Joel E.
Allied-Signal Inc.
Bennet Henry A.
Friedenson Jay P.
Gromada Denise L. F.
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