US3766020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam jet ejectors to reduce pressure in and produce stripping steam for deaerator
Assignee: United States Department of the Interior
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Filing: 1971-10-27
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Granted: 1973-10-16
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Expires: 1991-10-27
Abstract
Abstract Predeaeration system in which a stream of cool saline water is split into two streams, one being sent to a deaerator vessel, the other being sent to an LTV evaporator to provide gas stripping vapor for the deaerator. One or more steam jet ejectors reduce the pressure in the deaerator and remove noncondensibles from a primary distillation system. Exhaust motive steam from the ejectors is used to heat the LTV evaporator.
Inventors
- 👤 E Sieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:09
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/10; B01D19/00; B01D19/0005; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
The apparatus of claim 1 wherein a collection chamber is provided at the bottom of said tubes of said LTV evaporator; wherein said unvaporized saline water passes out the bottom of said tubes into said chamber; and wherein said generated vapor is withdrawn from said tubes into said chamber.
Claim 2
Dependent Claim
70 words
The apparatus of claim 1 wherein said shell side of said LTV unit is divided into two separate chambers, wherein said ejector provides heating steam for one of said chambers, wherein a second ejector provides exhaust motive steam as the heating medium for the other of said chambers, wherein said second ejector withdraws uncondensed gases from said first chamber and also withdraws noncondensibles from evaporators in said primary distillation plant.
Claim 3
Dependent Claim
190 words
A process for degasifying saline water prior to feeding it as distilland to a primary multistage flash distillation zone comprising: a. splitting said saline water into first and second streams; b. stripping gas from said first stream of said water in a deaeration zone wherein the only heating medium is the stripping medium; c. reducing both the pressure in said zone and removing noncondensibles from said primary distillation by steam jet ejection; d. generating vapor from said second stream of said water by passing said second stream downwardly, as falling film, through an evaporation zone; e. employing said generated vapor as a gas stripping medium in said deaeration zone by countercurrently contacting said first stream with said vapor as said first stream descends through said deaeration zone; f. employing exhaust motive steam from said steam jet ejection as a heating medium in said evaporation zone; g. removing deaerated saline water from sAid deaeration zone; h. removing unvaporized saline water from said evaporation zone; i. combining said removed deaerated water and said removed unvaporized water; and j. feeding said combined water to said primary multistage flash distillation zone as said distilland.
Claim 4
Dependent Claim
25 words
The process of claim 4 wherein said second stream of water constitutes less than 10 percent but more than 2 percent of said saline water.
Claim 5
Dependent Claim
75 words
The process of claim 4 wherein said second stream of saline water is vaporized in said evaporation zone in first and second separated zones; wherein said exhaust motive steam from said steam jet ejection is injected into the heating side of said first zone; wherein uncondensed gases are removed from said heating side by an additional steam jet ejection step; and wherein exhaust motive steam from said additional steam jet ejection heats said second zone.
Claim 6
Dependent Claim
22 words
The process of claim 6 wherein both of said steam jet ejections remove noncondensibles from evaporation zones in said primary distillation process.
References Cited (Backward Citations)
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |