US3766660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption gas drying method and apparatus
Assignee: Park Ohio Holdings Corp
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Filing: 1972-08-16
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Granted: 1973-10-23
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Expires: 1992-08-16
Abstract
Abstract A continuous gas drying method and apparatus is disclosed in which only a single primary adsorbent bed is used and in which secondary, smaller adsorbent bed is used to adsorb moisture from gas while the primary bed is being reactivated. While the primary bed is adsorbing moisture, the dry gas from the primary bed is utilized to reactivate the secondary bed. The gas flow is continuously through the primary adsorbent bed in a single direction only with the flow of dry air produced being reduced or the moisture level being somewhat higher during the reactivating period of the secondary adsorbent bed.
Inventors
- 👤 B Settlemyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:11
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/33
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
198 words
In an apparatus for continuously drying gas flowing therethrough, the combination comprising a single primary adsorbent bed including a desiccant material and receiving moist gas, a secondary adsorbent bed including a desiccant material and exhausting relatively dry gas, said primary and secondary adsorbent beds each having a moisture adsorbing condition and a regenerating condition, passage means connecting said primary and secondary adsOrbent beds for carrying said gas from the primary to the secondary bed, the moisture adsorbing condition of the primary adsorbent bed and the regenerating condition of the secondary adsorbent bed occurring simultaneously, the dry gas from the primary adsorbent bed flowing through and removing moisture from the secondary adsorbent bed during the moisture adsorbing condition of the former whereby the latter is regenerated, means for heating said moist gas received by the primary adsorbent bed during the regenerating condition of the latter the heated moist gas removing moisture from the primary adsorbent bed whereby the latter is regenerated, and the moisture adsorbing condition of the secondary adsorbent bed and the regenerating condition of the primary adsorbent bed occur simultaneously whereby moisture in the gas from the primary adsorbent bed is adsorbed by the secondary adsorbent bed.
Claim 2
Dependent Claim
198 words
In an apparatus for continuously drying gas flowing therethrough, the combination comprising a single primary adsorbent bed including a desiccant material and receiving moist gas, a secondary adsorbent bed including a desiccant material and exhausting relatively dry gas, said primary and secondary adsorbent beds each having a moisture adsorbing condition and a regenerating condition, passage means connecting said primary and secondary adsOrbent beds for carrying said gas from the primary to the secondary bed, the moisture adsorbing condition of the primary adsorbent bed and the regenerating condition of the secondary adsorbent bed occurring simultaneously, the dry gas from the primary adsorbent bed flowing through and removing moisture from the secondary adsorbent bed during the moisture adsorbing condition of the former whereby the latter is regenerated, means for heating said moist gas received by the primary adsorbent bed during the regenerating condition of the latter the heated moist gas removing moisture from the primary adsorbent bed whereby the latter is regenerated, and the moisture adsorbing condition of the secondary adsorbent bed and the regenerating condition of the primary adsorbent bed occur simultaneously whereby moisture in the gas from the primary adsorbent bed is adsorbed by the secondary adsorbent bed.
Claim 3
Dependent Claim
51 words
The combination according to claim 1 further comprising cooling and moisture removing means connected to said passage means intermediate the primary and secondary adsorbent beds and being operative only during the regenerating condition of the primary adsorbent bed to condense and remove part of the moisture from the heated moist gas.
Claim 4
Dependent Claim
18 words
The combination according to claim 2 wherein said secondary adsorbent bed is smaller than the primary adsorbent bed.
Claim 5
Dependent Claim
39 words
The combination according to claim 2 wherein said passage means includes means for by-passing a part of the dry gas from the primary adsorbent bed around the secondary adsorbent bed during the regenerating condition of the secondary adsorbent bed.
Claim 6
Dependent Claim
34 words
The combination according to claim 4 further comprising means for heating the secondary adsorbent bed and evaporating moisture therein during the regenerating condition of the latter to assist in regenerating the secondary adsorbent bed.
Claim 7
Dependent Claim
152 words
In a method of drying gas continuously in a gas drying system having a heater, a primary adsorbent bed, a cooler and a secondary adsorbent bed, the steps comprising: continously flowing moist gas through said primary adsorbent bed, maintaining the moist gas at a temperature such that the primary adsorbent bed adsorbs moisture from the gas to dry it, flowing the dry gas through said secondary adsorbent bed to remove moisture from and regenerate the latter, when the primary adsorbent bed becomes saturated heating the moist gas prior to flowing it through the primary adsorbent bed, cooling the moist gas flowing from the primary adsorbent bed while said moist gas is being heated to condense a part of the moisture from the moist gas, flowing the cooled gas through the secondary adsorbent bed to remove additional moisture from the gas and, when the primary adsorbent bed is regenerated, repeating the aforegoing steps.
Claim 8
Dependent Claim
152 words
In a method of drying gas continuously in a gas drying system having a heater, a primary adsorbent bed, a cooler and a secondary adsorbent bed, the steps comprising: continously flowing moist gas through said primary adsorbent bed, maintaining the moist gas at a temperature such that the primary adsorbent bed adsorbs moisture from the gas to dry it, flowing the dry gas through said secondary adsorbent bed to remove moisture from and regenerate the latter, when the primary adsorbent bed becomes saturated heating the moist gas prior to flowing it through the primary adsorbent bed, cooling the moist gas flowing from the primary adsorbent bed while said moist gas is being heated to condense a part of the moisture from the moist gas, flowing the cooled gas through the secondary adsorbent bed to remove additional moisture from the gas and, when the primary adsorbent bed is regenerated, repeating the aforegoing steps.
Claim 9
Dependent Claim
32 words
The method of claim 6 further comprising the step of by-passing a part of the dry gas from the primary adsorbent bed around the secondary adsorbent bed during regeneration of the latter.
Claim 10
Dependent Claim
33 words
The method of claim 7 further comprising the step of heating the secondary adsorbent bed while flowing dry gas through the secondary adsorbent bed to increase the rate of regeneration of the latter.
Claim 11
Dependent Claim
167 words
In a method of drying gas continuously in a gas drying system having a heater, a primary adsorbent bed, a cooler and a secondary adsorbent bed, the steps comprising, continuously flowing moist gas through said primary adsorbent bed, maintaining the moist gas at a temperature such that the primary adsorbent bed adsorbs moisture from the gas to dry it, flowing heated air through the secondary adsorbent bed to regenerate the latter only while the primary adsorbent bed is drying moist gas, when the primary adsorbent bed becomes saturated heating the moist gas prior to flowing it through the primary adsorbent bed to remove moisture from and regenerate the primary adsorbent bed, cooling the moist gas flowing from the primary adsorbent bed while said moist gas is being heated to condense a part of the moisture from the moist gas, flowing the cooled gas through the secondary adsorbent bed to remove additional moisture from the gas and, when the primary adsorbent bed is regenerated, repeating the aforegoing steps.
Claim 12
Dependent Claim
167 words
In a method of drying gas continuously in a gas drying system having a heater, a primary adsorbent bed, a cooler and a secondary adsorbent bed, the steps comprising, continuously flowing moist gas through said primary adsorbent bed, maintaining the moist gas at a temperature such that the primary adsorbent bed adsorbs moisture from the gas to dry it, flowing heated air through the secondary adsorbent bed to regenerate the latter only while the primary adsorbent bed is drying moist gas, when the primary adsorbent bed becomes saturated heating the moist gas prior to flowing it through the primary adsorbent bed to remove moisture from and regenerate the primary adsorbent bed, cooling the moist gas flowing from the primary adsorbent bed while said moist gas is being heated to condense a part of the moisture from the moist gas, flowing the cooled gas through the secondary adsorbent bed to remove additional moisture from the gas and, when the primary adsorbent bed is regenerated, repeating the aforegoing steps.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |