Patent US3718005A successfully refreshed from Google Patents.
US3718005A
Expired / Lapsed
US
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Reactivated low temperature adsorber system with a non-adsorbing cold accumulator
Assignee: Airco Inc
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Filing: 1970-03-25
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Granted: 1973-02-27
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Expires: 1990-03-25
Abstract
Abstract A gas processing system having cyclicly reactivated adsorbers normally operable in a low temperature range, a cold accumulator for refrigeration storage, and valved conduits interconnecting the adsorbers, accumulator and a source of reactivation gas, providing for isolation of an adsorber for reactivation; transfer of the adsorber refrigeration to the accumulator by a reactivation gas stream; reactivation and purging of the adsorber by heated reactivation gas; cooling of the adsorber by reactivation gas at ambient temperature; retransfer of the refrigeration from the accumulator to the adsorber by a counterstream of reactivation gas; and supplemental final cooldown of the adsorber by cold system gas.
Inventors
- 👤 Dermott R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:01
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04406; F25J3/04412; F25J3/04151; F25J3/04242; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04303; F25J3/04375; F25J3/04393; F25J2205/00; F25J2205/24; F25J2205/60; F25J2205/66; F25J2205/68; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
The method as specified in claim 1 wherein the process gas is pressurized and the adsorber upon isolation from the process stream is depressurized through the accumulator unit for initial transfer of refrigeration.
Claim 2
Dependent Claim
40 words
The method as specified in claim 1 wherein the refrigeration transfer and retransfer streams, and the adsorber reactivations stream are directed under pressure from a common source of process waste gas taken from the processing system at about ambient temperature.
Claim 3
Dependent Claim
36 words
The method as specified in claim 1 wherein the adsorber unit is cooled down to its normal low operating temperature by adding to the retransfer stream a portion of cold process gas downstream of the adsorbers.
Claim 4
Dependent Claim
23 words
The method as specified in claim 4 wherein the cold process gas is bled continuously into the accumulator unit at its refrigeration-receiving end.
Claim 5
Dependent Claim
39 words
The method as specified in claim 5 wherein a portion of dry, comparatively warm process gas upstream of the adsorbers is mixed with the cold process gas for moderating its temperature to above the freezing point of carbon dioxide.
Claim 6
Dependent Claim
32 words
The method as specified in claim 1 wherein the process gas is air to be separated into its principal components, and the reactivating gas is warm waste nitrogen from the processing system.
Claim 7
Dependent Claim
157 words
In a gas processing plant, a low temperature adsorber system comprising a plurality of parallel-connected adsorbers for removing carbon dioxide from a cold stream of process gas, selectively operated valving means for isolating in turn, each on-stream adsorber for cyclic reactivation, a source of reactivating gas at ambient temperature, means for selectively heating the reactivation gas, a cold accumulator unit having a non-adsorbing and non-absorbing bed of heat storage material, conduits interconnecting the cold isolated adsorber, cold accumulator unit and source of reactivating gas, and a plurality of conduit valves for selectively controlling respective interconnections, certain of said valves controlling flow of unheated reactivating gas serially through the isolated adsorber and the accumulator certain of said valves controlling flow of heated reactivating gas solely through the adsorber for heating it to reactivation temperature; and certain of said valves controlling reverse flow of unheated reactivating gas serially through the accumulator unit and isolated adsorber for cooling the adsorber.
Claim 8
Dependent Claim
28 words
A low temperature adsorber system as specified in claim 8 wherein the source of reactivation gas is waste product gas at about ambient temperature from the processing plant.
Claim 9
Dependent Claim
39 words
A low temperature adsorber system as specified in claim 8 wherein the accumulator unit near one refrigeration re-transfer end thereof is connected through a conduit and control valve to a source of cold process gas downstream of the adsorbers.
Claim 10
Dependent Claim
39 words
A low temperature adsorber system as specified in claim 10 wherein a valve controlled conduit is connected between a source of comparatively warm, dry process gas upstream of the adsorbers, and the aforesaid one end of the accumulator unit.
Claim 11
Dependent Claim
35 words
A low temperature adsorber system as specified in claim 8 wherein the accumulator unit comprises a tank insulated for cryogenic temperatures and packed with rocks of about 1/4 inch size for high heat storage capacity.
Claim 12
Dependent Claim
24 words
A low temperature adsorber system as specified in claim 9 wherein the reactivating gas supply conduit includes selectively operated heating and cooling units resPectively.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |