US3828837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for evaporating liquid from a solution or suspension
Assignee: GEA Process Engineering AS
•
Filing: 1972-09-11
•
Granted: 1974-08-13
•
Expires: 1992-09-11
Abstract
Abstract The present invention relates to evaporation of liquid from a solution or suspension in general and in particular to spray drying or spray concentrating. In such processes suspension or solution is sprayed into an evaporating or drying chamber to which heated drying gas is currently supplied, warm gas phase being simultaneously discharged from the evaporating or drying chamber through one or more discharge conduits or tubes. According to the invention solution or suspension is sprayed into at least one of the discharge tubes, for example by means of spraying or atomizing nozzles, liquid phase is separated from gas phase downstream of these nozzles, for example by means of cyclones, and the said solution or liquid being sprayed into the evaporating or drying chamber is the preconcentrated separated liquid phase. Thereby a two-step evaporation may be obtained by the use of a single evaporating or drying chamber.
Inventors
- 👤 B Lund
- 👤 Iversen J Damgaard
- 👤 O Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
An apparatus for evaporating liquid from a solution or suspension, said apparatus comprising: a single vertically disposed evaporating chamber in which liquid and drying media are introduced axially into the upper chamber thereof; an inlet tube in communication with said chamber for discharging drying gas to said chamber; at least one discharge tube in communication with said chamber for evacuating gas phase therefrom, said discharge tube having an elongated tube portion; a first liquid reservoir; first spraying means in communication with said first liquid reservoir and said evaporating chamber for spraying solution or suspension from said first liquid reservoir into said evaporating chamber; second spraying means; a second liquid reservoir for supplying suspension or solution to said second spraying means, said second liquid spraying means in communication with said second liquid reservoir and disposed within said discharge tube portion; and liquid separating means connected to said discharge tube downstream of said second liquid spraying means; said liquid separating means comprising means to separate remaining liquid phase from gas phase and further comprising means to pass separated liquid phase solely and directly from said discharge tube back into said first reservoir.
Claim 2
Independent Claim
190 words
An apparatus for evaporating liquid from a solution or suspension, said apparatus comprising: a single vertically disposed evaporating chamber in which liquid and drying media are introduced axially into the upper chamber thereof; an inlet tube in communication with said chamber for discharging drying gas to said chamber; at least one discharge tube in communication with said chamber for evacuating gas phase therefrom, said discharge tube having an elongated tube portion; a first liquid reservoir; first spraying means in communication with said first liquid reservoir and said evaporating chamber for spraying solution or suspension from said first liquid reservoir into said evaporating chamber; second spraying means; a second liquid reservoir for supplying suspension or solution to said second spraying means, said second liquid spraying means in communication with said second liquid reservoir and disposed within said discharge tube portion; and liquid separating means connected to said discharge tube downstream of said second liquid spraying means; said liquid separating means comprising means to separate remaining liquid phase from gas phase and further comprising means to pass separated liquid phase solely and directly from said discharge tube back into said first reservoir.
Claim 3
Dependent Claim
17 words
An apparatus or system according to claim 1, wherein said further liquid spraying means comprises atomizing nozzles.
Claim 4
Dependent Claim
16 words
An apparatus or system according to claim 1, wherein said liquid separating means comprises a cyclone.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1 wherein said first liquid spraying means comprises a rotating disc.
Claim 6
Dependent Claim
82 words
The apparatus of claim 1 wherein said first liquid spraying means is in communication with said evaporating chamber in an upper portion thereof whereby liquid from the first said liquid reservoir is downwardly directed and wherein said inlet tube is in communication with said evaporating chamber at the lower portion thereof for discharging gas thereinto in an upward direction and wherein said discharge tube is in communication with said evaporating chamber at a level thereof lower than said first liquid spraying means.
Claim 7
Dependent Claim
22 words
The apparatus as in claim 1 wherein said first liquid reservoir supplies preconcentrated suspension or solution to said first liquid spraying means.
Claim 8
Dependent Claim
23 words
The apparatus as in claim 1 wherein said second liquid reservoir supplies a nonconcentrated suspension or solution to said second liquid spraying means.
Claim 9
Dependent Claim
31 words
The apparatus as in claim 1 and further including liquid inlet means in communication with said second reservoir and said evaporating chamber for wetting the exterior wall of said inlet tube.
Claim 10
Dependent Claim
13 words
The apparatus as in claim 1 wherein said inlet tube is vertically disposed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |