Drying and gas or vapor contact with solids – Process – With contacting of material treated with solid or liquid agent
Reexamination Certificate
2006-02-21
2006-02-21
Lu, Jiping (Department: 3749)
Drying and gas or vapor contact with solids
Process
With contacting of material treated with solid or liquid agent
C034S343000, C034S473000, C095S098000, C095S122000, C095S123000
Reexamination Certificate
active
07000332
ABSTRACT:
A gas drying apparatus is provided having at least two desiccant-containing towers which alternately receive moisture-saturated air from an inlet to be dried during a drying phase, and then receive dry air during a regeneration phase to regenerate the desiccant which had previously adsorbed moisture from saturated air during the drying phase. The apparatus diverts a portion of dry air flowing along one of two flow paths including a first flow path having a heater and a pulse purge regeneration control valve for selectively enabling delivery of heated dry air to the tower being regenerated, and a second flow path which bypasses the first flow path and includes a bypass valve for selectively permitting delivery of unheated dry air to the tower being generated so as to cool the desiccant therein. A temperature sensing arrangement is provided for monitoring and maintaining the internal temperature of heated dry air delivered into the tower being regenerated.
REFERENCES:
patent: 4738692 (1988-04-01), Fresch et al.
patent: 5485686 (1996-01-01), Sears, Jr.
patent: 6729039 (2004-05-01), Crawford
Fresch Vincent P
Mathews Titus A.
Andrus Sceales Starke & Sawall LLP
Lu Jiping
Pneumatech, Inc.
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