Patent NL294221A successfully refreshed from Google Patents.
Patent US4451231A successfully refreshed from Google Patents.
US4451231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying of particulate material
Assignee: Phillips Petroleum Co
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Filing: 1983-01-17
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Granted: 1984-05-29
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Expires: 2003-01-17
Abstract
Abstract A process for the removal of volatile liquid from particulate material employing indirect heating of the particulate material by means of combustion gases resulting from the combustion of sulfur-containing fuel, and further employing purging of the thus heated particulate material by means of combustion gases produced by the combustion of low sulfur fuel to remove vaporized volatile liquid from the particulate material. Also disclosed is a system for performing such removal of volatile liquid from particulate material.
Inventors
- 👤 Lawrence K. Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:14
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F26; F26B; F26B23/00; F26B23/02; F26B3/00; F27B7/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
152 words
A process for removing volatile liquid from liquid-laden particulate material, comprising: introducing said liquid-laden particulate material into a drying zone defined by a closed vessel having an exterior and an interior; burning a first mixture comprising air and a first fuel to produce first hot combustion gases; contacting the exterior of said vessel with said first hot combustion gases to heat the interior of said vessel and thereby vaporize volatile liquid therein; burning a second mixture comprising air and a second fuel to produce second hot combustion gases, said second fuel containing substantially less sulfur and sulfur compounds than said first fuel; passing a first quantity of said thus produced second hot combustion gases through the interior of said vessel to purge the vaporized volatile liquid from said drying zone; and thereafter filtering said second hot combustion gases and said thus purged vaporized volatile liquid to separate therefrom particulate material entrained therein.
Claim 2
Dependent Claim
152 words
A process for removing volatile liquid from liquid-laden particulate material, comprising: introducing said liquid-laden particulate material into a drying zone defined by a closed vessel having an exterior and an interior; burning a first mixture comprising air and a first fuel to produce first hot combustion gases; contacting the exterior of said vessel with said first hot combustion gases to heat the interior of said vessel and thereby vaporize volatile liquid therein; burning a second mixture comprising air and a second fuel to produce second hot combustion gases, said second fuel containing substantially less sulfur and sulfur compounds than said first fuel; passing a first quantity of said thus produced second hot combustion gases through the interior of said vessel to purge the vaporized volatile liquid from said drying zone; and thereafter filtering said second hot combustion gases and said thus purged vaporized volatile liquid to separate therefrom particulate material entrained therein.
Claim 3
Dependent Claim
22 words
A process in accordance with claim 1 characterized further to include the step of: agitating said particulate material in said drying zone.
Claim 4
Dependent Claim
23 words
A process in accordance with claim 1 where said second fuel comprises a fuel which is substantially free of sulfur and sulfur compounds.
Claim 5
Dependent Claim
25 words
A process in accordance with claim 1 characterized further to include: venting the thus filtered second hot combustion gases and vaporized volatile liquid to atmosphere.
Claim 6
Dependent Claim
49 words
A process in accordance with claim 1 characterized further to include introducing a second quantity of said second hot combustion gases into said first quantity of said second hot combustion gases and said thus pruged vaporized volatile liquid subsequent to said passing step and prior to said filtering step.
Claim 7
Dependent Claim
46 words
A process in accordance with claim 1 wherein said second fuel comprises a fuel which is substantially free of sulfur and sulfur compounds, and wherein said process is characterized further to include: venting the thus filtered second hot combustion gases and vaporized volatile liquid to atmosphere.
Claim 8
Dependent Claim
49 words
A process in accordance with claim 6 characterized further to include introducing a second quantity of said second hot combustion gases into said first quantity of said second hot combustion gases and said thus purged vaporized volatile liquid subsequent to said purging step and prior to said filtering step.
Claim 9
Dependent Claim
22 words
A process in accordance with claim 7 characterized further to include the step of agitating said particulate material in said drying zone.
Claim 10
Dependent Claim
14 words
A process in accordance with claim 8 wherein said particulate material comprises carbon black.
Claim 11
Dependent Claim
13 words
A process in accordance with claim 9 wherein said volatile liquid comprises water.
Claim 12
Dependent Claim
113 words
A dryer for removing volatile liquid from particulate material, comprising: a rotary drum; means for feeding volatile liquid-laden particulate material into said drum; means for rotating said drum to move said particulate material in said drum; means for generating first sulfur-containing combustion gases from at least one sulfur-containing fuel and applying said thus generated first combustion gases to the exterior of said drum to heat the interior of said drum and said particulate material therein; and means for generating second substantially sulfur-free combustion gases and passing at least a first portion of said thus generated second combustion gases through the interior of said drum to purge the vaporized volatile liquid form said drum.
Claim 13
Dependent Claim
113 words
A dryer for removing volatile liquid from particulate material, comprising: a rotary drum; means for feeding volatile liquid-laden particulate material into said drum; means for rotating said drum to move said particulate material in said drum; means for generating first sulfur-containing combustion gases from at least one sulfur-containing fuel and applying said thus generated first combustion gases to the exterior of said drum to heat the interior of said drum and said particulate material therein; and means for generating second substantially sulfur-free combustion gases and passing at least a first portion of said thus generated second combustion gases through the interior of said drum to purge the vaporized volatile liquid form said drum.
Claim 14
Dependent Claim
64 words
A dryer in accordance with claim 11 characterized further to include means for admixing a second portion of said second combustion gases with said first portion of said second combustion gases and purged vaporized volatile liquid downstream of said drum so as to maintain the temperature of the thus admixed gases and vaporized volatile liquid above the condensation temperature of said vaporized volatile liquid.
Claim 15
Dependent Claim
31 words
A dryer in accordance with claim 11 wherein said means for generatig first sulfur-containing combustion gases includes means for receiving and combusting off-gases produced in the manufacture of said particulate material.
Claim 16
Dependent Claim
60 words
A dryer in accordance with claim 11 characterized further to include filter means in fluid flow communication with said drum for receiving said second combustion gases and purged vaporized volatile liquid from said drum, separating said gases and vaporized volatile liquid from any of said particulate material entrained therein and venting said gases and said vaporized volatile liquid to atmosphere.
Claim 17
Dependent Claim
44 words
A dryer in accordance with claim 14 characterized further to include gas scrubber means in fluid flow communication with said first sulfur-containing combustion gases downstream of said retary drum for separating sulfur-containing compounds from said gases and venting said thus scrubbed gases to atmosphere.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |