Patent US4663666A successfully refreshed from Google Patents.
Patent US3930958A successfully refreshed from Google Patents.
US3930958A
Expired / Lapsed
US
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Desalination apparatus
Assignee: Zeoplant Co Ltd
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Filing: 1974-05-29
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Granted: 1976-01-06
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Expires: 1994-05-29
Abstract
Abstract Desalination apparatus with the double feature of condensation and evaporation, comprising plural dish-like condensing elements piled coaxially, wherein a sloped bottom diaphragm is provided in each element, at the lower part of each of which an upwardly diverging duct is provided. A cooling pipe is led through the ducts of the elements. A depending pipe is provided near the outer edge of each element, through which the supplied sea water flows from an upper element to a successive lower element. The lowest condensing element is heated or is filled up with water that is hotter than the supplied sea water. The distilled water obtained on each condensing element is withdrawn from the lower edges of the ducts as a result of evaporation from the elements and subsequent condensation on the undersides of the diaphragms.
Inventors
- 👤 Nobuo Maruichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:34
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/26; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/08; C02F1/14; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/138; Y02A20/142; Y02A20/20; Y02A20/208; Y02A20/212
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the sturcture; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and condensation-promoting, drop-inhibiting layers applied to the undersides of at least some of said diaphragms, said layers being in the form of a metallic mesh.
Claim 2
Dependent Claim
138 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the sturcture; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and condensation-promoting, drop-inhibiting layers applied to the undersides of at least some of said diaphragms, said layers being in the form of a metallic mesh.
Claim 3
Dependent Claim
142 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and condensation-promoting, drop-inhibiting layers applied to the undersides of at least some of said diaphragms, said layers being in the form of a woven material.
Claim 4
Dependent Claim
142 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and condensation-promoting, drop-inhibiting layers applied to the undersides of at least some of said diaphragms, said layers being in the form of a woven material.
Claim 5
Dependent Claim
133 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; and a drain receiver below the lowermost one of said ducts for leading away condensed vapors; wherein the separation between said elements is between 15 and 20 millimeters in said structure.
Claim 6
Dependent Claim
133 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except for the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; and a drain receiver below the lowermost one of said ducts for leading away condensed vapors; wherein the separation between said elements is between 15 and 20 millimeters in said structure.
Claim 7
Dependent Claim
149 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except of the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and a vertical, vapor-condensing and feed conveying cooling pipe projecting with its top into said topmost element, below the water level therein, and passing downward through said axial passageway and drain receiver.
Claim 8
Dependent Claim
149 words
A desalination apparatus comprising, in combination, at least three evaporating-condensing elements coaxially superposed in a vertical structure, with circumscribing rims sealed against a casing and inwardly declining bottom diaphragms; a feed tube above the topmost one of said elements for introducing salt water to be desalinated; said diaphragms having upwardly diverging inner walls defining central ducts which constitute an axial passageway through the structure; liquid-conveying discharge pipes leading from each of said elements to the next lower element, except of the lowermost one of said elements, which has instead a tube for discharging concentrated salt water; means for heating said lowermost element; a drain receiver below the lowermost one of said ducts for leading away condensed vapors; and a vertical, vapor-condensing and feed conveying cooling pipe projecting with its top into said topmost element, below the water level therein, and passing downward through said axial passageway and drain receiver.
Claim 9
Dependent Claim
25 words
The desalination apparatus as defined in claim 4, wherein said heating means is in the form of a heat source placed below said lowermost element.
Claim 10
Dependent Claim
46 words
The desalination apparatus as defined in claim 4, wherein said heating means is in the form of a pipe for supplying hot water to said lowermost element with a temperature as high as or higher than that of the salt water introduced into said lowermost element.
Claim 11
Dependent Claim
16 words
The desalination apparatus as defined in claim 4, wherein said ducts of the diaphragms diverge outwardly.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |