US4030896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of adsorbents
Assignee: Linde GmbH
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Filing: 1976-04-08
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Granted: 1977-06-21
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Expires: 1996-04-08
Abstract
Abstract In an adsorption process for the separation of gases, e.g., in the separation of CO 2 and H 2 O from air, wherein gas to be separated is passed through one of several interchangeably connected adsorbers, and a main stream of regenerating gas is passed in two periods through another of said interchangeably connected adsorbers, the first period being a heating period to desorb the adsorbent, and the second period being a cooling period to cool the adsorbent to adsorption temperatures, During the cooling period, branching a partial stream of regenerating gas from the main stream, heating the partial stream with the means, and passing resultant heated partial stream over a heat accumulator, and during the heating period, passing the main stream of regenerating gas across said heat accumulator to recover the heat stored in the accumulator during the cooling period, and then further heating the main stream with the heating means to heating period regeneration temperatures.
Inventors
- 👤 Hans Wimber
- 👤 Wilhelm Rohde
- 👤 Jorg Reyhing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0438; B01D2257/00; B01D2257/50; B01D2257/504; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40086; B01D2259/402; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
180 words
In an adsorption process for the separation of gases wherein gas to be separated is passed through one of several interchangeably connected adsorbers, and a main stream of regenerating gas is passed in two sequential periods through another of said interchangeably connected adsorbers, the first period being an open cycle heating period to desorb the adsorbent, and the second period being an open cycle cooling period to cool the adsorbent to adsorption temperatures said stream of regenerating gas in both of said periods being from a common source, the improvement which comprises, during said cooling period, branching partial stream of regenerating gas from said main stream, heating said partial stream with heating means, and passing resultant heated partial stream over a heat accumulator, and during said heating period, passing said main stream of regenerating gas across said heat accumulator to recover heat stored in said accumulator during the cooling period, and further heating said main stream with said heating means to heating period regeneration temperature, said heating means comprising a heater yielding a source of heat independent of said adsorbers.
Claim 2
Dependent Claim
180 words
In an adsorption process for the separation of gases wherein gas to be separated is passed through one of several interchangeably connected adsorbers, and a main stream of regenerating gas is passed in two sequential periods through another of said interchangeably connected adsorbers, the first period being an open cycle heating period to desorb the adsorbent, and the second period being an open cycle cooling period to cool the adsorbent to adsorption temperatures said stream of regenerating gas in both of said periods being from a common source, the improvement which comprises, during said cooling period, branching partial stream of regenerating gas from said main stream, heating said partial stream with heating means, and passing resultant heated partial stream over a heat accumulator, and during said heating period, passing said main stream of regenerating gas across said heat accumulator to recover heat stored in said accumulator during the cooling period, and further heating said main stream with said heating means to heating period regeneration temperature, said heating means comprising a heater yielding a source of heat independent of said adsorbers.
Claim 3
Dependent Claim
54 words
A process according to claim 1, wherein the partial stream of regenerating gas from the main stream of regenerating gas is branched off during the cooling period at a point before the main stream is passed into said one of several interchangeably connected adsorbers, and said partial stream is not heated by said adsorbers.
Claim 4
Dependent Claim
38 words
A process according to claim 1, wherein the partial stream of regenerating gas from the main stream of regenerating gas is branched off during the cooling period after being discharged from said one of several interchangeably connected adsorbers.
Claim 5
Dependent Claim
32 words
A process according to claim 3, comprising only two parallel connected adsorbers, wherein the time of the cooling period coincides with the time period during which the heat accumulator is heated up.
Claim 6
Dependent Claim
61 words
A process according to claim 3, wherein said adsorption process comprises the removal of carbon dioxide and water vapor from air, the regenerating gas is predominantly nitrogen, and of the total regeneration time devoted to each adsorber, about 1/3 to 1/4 of time is devoted to said first period, and the remainder of the time is devoted to said second period.
Claim 7
Dependent Claim
32 words
A process according to claim 1, comprising only two parallel connected adsorbers, wherein the time of the cooling period coincides with the time period during which the heat accumulator is heated up.
Claim 8
Dependent Claim
61 words
A process according to claim 1, wherein said adsorption process comprises the removal of carbon dioxide and water vapor from air, the regenerating gas is predominantly nitrogen, and of the total regeneration time devoted to each adsorber, about 1/3 to 1/4 of time is devoted to said first period, and the remainder of the time is devoted to said second period.
Claim 9
Dependent Claim
17 words
A process according to claim 7, wherein said regenerating gas is obtained from an air fractionation column.
Claim 10
Dependent Claim
21 words
A process according to claim 7 wherein said heater is run continuously throughout the heating and the cooling of the adsorber.
Claim 11
Dependent Claim
16 words
A process according to claim 9 wherein the heater is run at a constant temperature level.
Claim 12
Dependent Claim
17 words
A process according to claim 10 comprising two parallel connected adsorbers coupled with only one heat accumulator.
Claim 13
Dependent Claim
17 words
A process according to claim 1 comprising two parallel connected adsorbers coupled with only one heat accumulator.
Claim 14
Dependent Claim
21 words
A process according to claim 1 wherein said heater is run continuously throughout the heating and the cooling of the adsorber.
Claim 15
Dependent Claim
16 words
A process according to claim 13 wherein the heater is run at a constant temperature level.
Claim 16
Dependent Claim
78 words
A heater-accumulator consisting essentially of a substantially cylindrical housing and disposed concentrically within said housing, a thermally insulated pipe, electric heating means disposed within said thermally insulated pipe, said pipe and said housing defining a concentric space; heat accumulator packing arranged in and completely filling said concentric space, a support comprising a grating for said packing, and switching valve and conduit means for allowing flow in sequence across the heat accumulator packing and heating means and vice versa.
Claim 17
Dependent Claim
78 words
A heater-accumulator consisting essentially of a substantially cylindrical housing and disposed concentrically within said housing, a thermally insulated pipe, electric heating means disposed within said thermally insulated pipe, said pipe and said housing defining a concentric space; heat accumulator packing arranged in and completely filling said concentric space, a support comprising a grating for said packing, and switching valve and conduit means for allowing flow in sequence across the heat accumulator packing and heating means and vice versa.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |