Patent US3716458A successfully refreshed from Google Patents.
US3716458A
Expired / Lapsed
US
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Process and apparatus for recovering clean water from dilute solutions of waste solids
Assignee: AMERICAN BIOTHERM COMPANY LLC
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Filing: 1970-09-18
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Granted: 1973-02-13
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Expires: 1990-09-18
Abstract
Abstract An improved process and apparatus for recovering clean water from dilute solutions of waste solids. A dilute stream of waste solids is concentrated by evaporation and the evaporated water is condensed and recovered. The waste solids in concentrated solution are mixed with oil and subject to further drying by evaporation. Again the evaporated water is condensed and recovered. If desired, the waste solids may be separated from the oil which may then be recycled.
Inventors
- 👤 C Greenfield
- 👤 R Casparian
- 👤 A Bonanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/048; B; B01; B01D; B01D1/00; B01D1/26; C02F1/045; C02F11/00; C02F11/002; Y; Y10; Y10S; Y10S159/00; Y10S159/33
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
A process for recovering clean water from dilute solutions of waste solids, said process comprising the steps of (1) concentrating a dilute aqueous solution of waste solids by heat evaporation to yield water vapor and a concentrated solution of waste solids; (2) condensing said water vapor and recovering the resulting condensate as a clean water product; (3) admixing said concentrated solution of waste solids with a relatively non-volatile oil to obtain a mixture which will remain fluid and pumpable after the removal of the water content therefrom; (4) dehydrating the resultant oil-containing mixture by heat evaporation to yield water vapor and a substantially anhydrous waste solids in oil slurry, and (5) condensing said water vapor from dehydration step (4) and recovering the resulting condensate as a clean water product.
Claim 2
Dependent Claim
129 words
A process for recovering clean water from dilute solutions of waste solids, said process comprising the steps of (1) concentrating a dilute aqueous solution of waste solids by heat evaporation to yield water vapor and a concentrated solution of waste solids; (2) condensing said water vapor and recovering the resulting condensate as a clean water product; (3) admixing said concentrated solution of waste solids with a relatively non-volatile oil to obtain a mixture which will remain fluid and pumpable after the removal of the water content therefrom; (4) dehydrating the resultant oil-containing mixture by heat evaporation to yield water vapor and a substantially anhydrous waste solids in oil slurry, and (5) condensing said water vapor from dehydration step (4) and recovering the resulting condensate as a clean water product.
Claim 3
Dependent Claim
39 words
The process of claim 1 wherein concentration step (2) is carried out at temperatures in the range of about 70* to 250*F and dehydration step (5) is carried out at temperatures in the range of about 70* to 400*F.
Claim 4
Independent Claim
287 words
An apparatus for recovering clean water from dilute solutions of waste solids, said apparatus comprising (1) a tank adapted to receive a stream of a dilute aqueous solution of waste solids, (2) a first evaporator, (3) a conduit extending from said tank to said first evaporator wherethrough may flow a stream of said dilute solution of waste solids from said tank into the evaporating region of said first evaporator, (4) a first condenser, (5) a conduit extending from said first evaporator to the condensing region oF said first condenser through which may flow water vapor formed as a result of concentrating said dilute solution of waste solids by heat evaporation, (6) means for withdrawing water vapor condensate from said first condenser as a clean water product, (7) a second evaporator, (8) a combustion apparatus associated with both said evaporators for supplying evaporative heat thereto, (9) a conduit extending from said first evaporator to the evaporating region of said second evaporator wherethrough may flow a stream of a concentrated solution of waste solids from said first evaporator, (10) an oil reservoir, (11) means for transmitting oil from said oil reservoir to said conduit extending from said first evaporator to said second evaporator whereby a resultant mixed stream of concentrated solution of waste solids and oil may be conducted into the evaporating region of said second evaporator, (12) a second condenser, (13) a conduit extending from said second evaporator to the condensing region of said second condenser through which may flow water vapor formed as a result of dehydrating said mixture of concentrated solution of waste solids and oil by heat evaporation, and (14) means for withdrawing water vapor condensate from said second condenser as a clean water product.
Claim 5
Independent Claim
287 words
An apparatus for recovering clean water from dilute solutions of waste solids, said apparatus comprising (1) a tank adapted to receive a stream of a dilute aqueous solution of waste solids, (2) a first evaporator, (3) a conduit extending from said tank to said first evaporator wherethrough may flow a stream of said dilute solution of waste solids from said tank into the evaporating region of said first evaporator, (4) a first condenser, (5) a conduit extending from said first evaporator to the condensing region oF said first condenser through which may flow water vapor formed as a result of concentrating said dilute solution of waste solids by heat evaporation, (6) means for withdrawing water vapor condensate from said first condenser as a clean water product, (7) a second evaporator, (8) a combustion apparatus associated with both said evaporators for supplying evaporative heat thereto, (9) a conduit extending from said first evaporator to the evaporating region of said second evaporator wherethrough may flow a stream of a concentrated solution of waste solids from said first evaporator, (10) an oil reservoir, (11) means for transmitting oil from said oil reservoir to said conduit extending from said first evaporator to said second evaporator whereby a resultant mixed stream of concentrated solution of waste solids and oil may be conducted into the evaporating region of said second evaporator, (12) a second condenser, (13) a conduit extending from said second evaporator to the condensing region of said second condenser through which may flow water vapor formed as a result of dehydrating said mixture of concentrated solution of waste solids and oil by heat evaporation, and (14) means for withdrawing water vapor condensate from said second condenser as a clean water product.
Claim 6
Independent Claim
361 words
An apparatus for recovering clean water from dilute solutions of waste solids, said apparatus comprising (1) a tank adapted to receive a stream of a dilute aqueous solution of waste solids, (2) separator means adapted to divide said dilute solution of waste solids into a relatively concentrated waste solids solution fraction and a relatively very dilute waste solids solution fraction, (3) a conduit extending from said tank to said separator means wherethrough may flow a stream of said dilute solution of waste solids to be separated, (4) a first evaporator, (5) a conduit extending from said separator means to said first evaporator through which may flow a stream of said relatively very dilute waste solids solution fraction from said separator means into the evaporating region of said first evaporator, (6) a first condenser, (7) a conduit extending from said first evaporator to the condensing region of said first condenser through which may flow water vapor formed as a result of concentrating said relatively very dilute waste solids solution fraction by heat evaporation, (8) means for withdrawing water vapor condensate from said first condenser as a clean water product, (9) a second evaporator, (10) a combustion apparatus associated with both said evaporators for supplying evaporative heat thereto, (11) a conduit extending from said first evaporator to the evaporating region of said second evaporator through which may flow a stream of concentrated solution of waste solids from said first evaporator, (12) an oil reservoir, (13) means for transmitting oil from said oil reservoir into the region of said separator means wherefrom is discharged said relatively concentrated waste solids solution fraction, (14) means for conducting the resultant mixture of concentrated solution of waste solids and oil from the separator means into said conduit extending from said first evaporator to the evaporating region of said second evaporator, (15) a second condenser, (16) a conduit extending from said second evaporator to said second condenser through which may flow water vapor formed as a result of dehydrating said mixture of concentrated solution of waste solids and oil by heat evaporation, and (17) means for withdrawing water vapor condensate from said second condenser as a clean water product.
Claim 7
Independent Claim
361 words
An apparatus for recovering clean water from dilute solutions of waste solids, said apparatus comprising (1) a tank adapted to receive a stream of a dilute aqueous solution of waste solids, (2) separator means adapted to divide said dilute solution of waste solids into a relatively concentrated waste solids solution fraction and a relatively very dilute waste solids solution fraction, (3) a conduit extending from said tank to said separator means wherethrough may flow a stream of said dilute solution of waste solids to be separated, (4) a first evaporator, (5) a conduit extending from said separator means to said first evaporator through which may flow a stream of said relatively very dilute waste solids solution fraction from said separator means into the evaporating region of said first evaporator, (6) a first condenser, (7) a conduit extending from said first evaporator to the condensing region of said first condenser through which may flow water vapor formed as a result of concentrating said relatively very dilute waste solids solution fraction by heat evaporation, (8) means for withdrawing water vapor condensate from said first condenser as a clean water product, (9) a second evaporator, (10) a combustion apparatus associated with both said evaporators for supplying evaporative heat thereto, (11) a conduit extending from said first evaporator to the evaporating region of said second evaporator through which may flow a stream of concentrated solution of waste solids from said first evaporator, (12) an oil reservoir, (13) means for transmitting oil from said oil reservoir into the region of said separator means wherefrom is discharged said relatively concentrated waste solids solution fraction, (14) means for conducting the resultant mixture of concentrated solution of waste solids and oil from the separator means into said conduit extending from said first evaporator to the evaporating region of said second evaporator, (15) a second condenser, (16) a conduit extending from said second evaporator to said second condenser through which may flow water vapor formed as a result of dehydrating said mixture of concentrated solution of waste solids and oil by heat evaporation, and (17) means for withdrawing water vapor condensate from said second condenser as a clean water product.
Claim 8
Dependent Claim
45 words
The apparatus of claim 4 wherein said first evaporator and said second evaporator are both multi-stage evaporators and each is adapted to have fluid material to be heated and evaporated in it and vaporous material to effect this heating and evaporating flow through it countercurrenTly.
Claim 9
Dependent Claim
47 words
The apparatus of claim 4 wherein said combustion apparatus associated with both said evaporators comprises a boiler-furnace for the generation of steam and wherein further there are conduit means extending from said boiler-furnace to said evaporators wherethrough heating steam may flow from said boiler-furnace to said evaporators.
Claim 10
Dependent Claim
79 words
The apparatus of claim 4 which further comprises a pressing apparatus adapted to effect a separation of said mixture of concentrated solution of waste solids and oil into its components of substantially oil-free waste solids and an oil following dehydration of said mixture in said second evaporator, and a conduit extending from said second evaporator to said pressing apparatus through which a dehydrated mixture of waste solids and oil may flow from said second evaporator to said pressing apparatus.
Claim 11
Dependent Claim
42 words
The apparatus of claim 7 which further comprises a conduit extending from said pressing apparatus to said oil reservoir through which oil separated from said dehydrated mixture of waste solids and oil may flow from said pressing apparatus to said oil reservoir.
Claim 12
Dependent Claim
59 words
The apparatus of claim 7 which further comprises conveying means extending from said pressing apparatus to the furnace region of said boiler-furnace whereby substantially oil-free waste solids separated from said dehydrated mixture of waste solids and oil may be transferred from said pressing apparatus to said furnace region to be burned therein as fuel for the generation of steam.
Claim 13
Dependent Claim
172 words
A process for recovering clean water from dilute solutions of waste solids, said process comprising the steps of (1) separating a dilute aqueous solution of waste solids into a relatively concentrated waste solids solution fraction and a relatively very dilute waste solids solution fraction; (2) concentrating said relatively very dilute waste solids solution fraction by heat evaporation to yield water vapor and a concentrated solution of waste solids; (3) condensing said water vapor and recovering the resulting condensate as a clean water product: (4) combining said relatively concentrated waste solids solution fraction from step (1) with a relatively non-volatile oil and further with said concentrated solution of waste solids from step (2) to obtain a mixture which will remain fluid and pumpable after the removal of the water content therefrom; (5) dehydrating the resultant oil-containing mixture by heat evaporation to yield water vapor and a substantially anhydrous waste solids in oil slurry, and (6) condensing said water vapor from dehydration step (5) and recovering the resulting condensate as a clean water product.
Claim 14
Dependent Claim
172 words
A process for recovering clean water from dilute solutions of waste solids, said process comprising the steps of (1) separating a dilute aqueous solution of waste solids into a relatively concentrated waste solids solution fraction and a relatively very dilute waste solids solution fraction; (2) concentrating said relatively very dilute waste solids solution fraction by heat evaporation to yield water vapor and a concentrated solution of waste solids; (3) condensing said water vapor and recovering the resulting condensate as a clean water product: (4) combining said relatively concentrated waste solids solution fraction from step (1) with a relatively non-volatile oil and further with said concentrated solution of waste solids from step (2) to obtain a mixture which will remain fluid and pumpable after the removal of the water content therefrom; (5) dehydrating the resultant oil-containing mixture by heat evaporation to yield water vapor and a substantially anhydrous waste solids in oil slurry, and (6) condensing said water vapor from dehydration step (5) and recovering the resulting condensate as a clean water product.
Claim 15
Dependent Claim
32 words
The process of claim 10 which further comprises the step of separating said anhydrous waste solids in oil slurry to give a dry and substantially oil-free waste solids product and an oil.
Claim 16
Dependent Claim
58 words
The process of claim 11 which further comprises the step of utilizing at least part of the oil resulting from the separation of said waste solids in oil slurry as at least part of the oil combined with said relatively concentrated waste solids solution fraction from step (1) and said concentrated solution of waste solids from step (2).
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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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |