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US3607668A
Expired / Lapsed
US
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Concentrated brine-incoming feed vapor compression desalination system
Assignee: AMF Inc
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Filing: 1968-11-12
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Granted: 1971-09-21
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Expires: 1988-11-12
Abstract
Abstract A multistage flash distillation system wherein heated feed water is passed through successively lower stages to flash into vapor, which vapor is condensed as distillate, the effluent brine from the lowest stage being passed to a boiler to produce steam, which steam is compressed and so utilized to heat the incoming feed.
Inventors
- 👤 William Rodger Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02A; Y02A20/00; Y02A20/124
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
The evaporator according to claim 1 including means for withdrawing compressed steam exhausted from said heat recovery means and mixing said compressed steam with the condensed vapors produced in said evaporator.
Claim 2
Dependent Claim
82 words
A flash evaporator according to claim 1 including heat generating means and conduit means to sequentially pass said feed solution in heat exchange relationship with said heat generating means to said heat rejection means wherein a portion of said feed solution is converted to steam in the low pressure stage of said flash evaporator condensing means and acts in said flash evaporator condensing means as the condensing media and then passes to the high pressure stage flash evaporator to flash into vapor.
Claim 3
Dependent Claim
53 words
An evaporator according to claim 3 including means for withdrawing unflashed feed solution from said evaporator, means for withdrawing distillate from said condensing means, both said withdrawing means being in heat exchange relationship with the conduit means For passing feed solution to the heat generating means whereby said feed solution may be preheated.
Claim 4
Independent Claim
115 words
A method of desalinating sea water comprising the steps of passing heated sea water feed solution serially through successively lower pressure stages of a multistage flash evaporator to produce a vapor fraction and a brine fraction, condensing said vapor fraction to produce a distillate and withdrawing said distillate passing said brine fraction to a boiler to convert a portion thereof along with a portion of heated raw sea water feed into steam passing the remainder of said brine fraction of said heated sea water feed to waste, compressing said steam to increase its temperature, passing said compressed steam into heat exchange relationship with said feed solution to transfer the heat thereof to said feed solution.
Claim 5
Dependent Claim
23 words
The method according to claim 5 including the step of condensing said compressed steam and mixing the same with said condensed vapor fraction.
Claim 6
Dependent Claim
55 words
The method recited in claim 5 comprising the further steps of preheating raw sea water to form a part of said feed solution by passing it in heat exchange relation with said distillate product and with said brine portion discharged to waste and then treating said preheated raw sea water to remove corrosive agents therefrom.
Claim 7
Dependent Claim
21 words
The method recited in claim 7 in which said raw sea water is preheated to temperatures in excess of 200* F.
Claim 8
Dependent Claim
39 words
The method recited in claim 7 in which said treating step comprises injecting acid into said preheated raw sea water to remove HCO3 ions therefrom, and then deaerating the acid treated sea water to remove CO2 and air therefrom.
Claim 9
Dependent Claim
28 words
The method recited in claim 9 in which said treated sea water is mixed with a brine fraction produced in said flash evaporator to form said feed solution.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |