Patent US3920774A successfully refreshed from Google Patents.
US3920774A
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US
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Evaporative cooler
Assignee: UNITED MCGILL Corp A CORP OF OH
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Filing: 1974-01-10
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Granted: 1975-11-18
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Expires: 1994-01-10
Abstract
Abstract A cooling tower for reducing process gas temperature by vaporization of liquid water while maintaining a dry bottom operation. The gas discharge duct is located in the lower hopper of the tower and a preferred orientation of spray nozzles insures minimum condensation of the atomized water spray. The water supply is regulated by a cascade control system employing both proportional and derivative modes of control during steady state operation and only proportional control during start-up operation.
Inventors
- 👤 Stanley A Reigel
- 👤 Charles D Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:16
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28C3/08; B; B01; B01D; B01D51/00; B01D51/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
AN EVAPORATIVE COOLER FOR COOLING HOT PROCESS GAS BY THE VAPORIZATION OF LIQUID WATER, SAID COOLER COMPRISING: A VERTICAL VESSEL HAVING A RADIUS R; AN INLET GAS CONDUIT CONNECTED TO THE TOP OF SAID VESSEL FOR DELIVERING HOT PROCESS GAS THERETO; AN OUTLET GAS DUST CONNECTED TO THE BOTTOM OF SAID VESSEL FOR DISCHARGING PROCESS GAS THEREFROM; LIQUID SPRAY MEANS DISPOSED IN THE UPPER REGION OF SAID VESSEL FOR SPRAYING LIQUID WATER INTO THE VESSEL, SAID MEANS INCLUDING A NOZZLE EMITTING A CONE-SHAPE SPRAY PATTERN CHARACTERIZED BY AN INCLUDED CONE ANGLE $, SAID NOZZLE LOCATED FROM THE CENTER OF SAID VESSEL NO GREATER THAN THE DISTANCE R DEFINED BY THE EXPRESSION: R=R-2 TAN(#/2) WHEREBY CONTACT OF THE SPRAY PATTERN WITH THE VESSEL IS PREVENTED IN ORDER TOMINIMIZE CONDENSATION OF THE WATER.
Claim 2
Dependent Claim
131 words
AN EVAPORATIVE COOLER FOR COOLING HOT PROCESS GAS BY THE VAPORIZATION OF LIQUID WATER, SAID COOLER COMPRISING: A VERTICAL VESSEL HAVING A RADIUS R; AN INLET GAS CONDUIT CONNECTED TO THE TOP OF SAID VESSEL FOR DELIVERING HOT PROCESS GAS THERETO; AN OUTLET GAS DUST CONNECTED TO THE BOTTOM OF SAID VESSEL FOR DISCHARGING PROCESS GAS THEREFROM; LIQUID SPRAY MEANS DISPOSED IN THE UPPER REGION OF SAID VESSEL FOR SPRAYING LIQUID WATER INTO THE VESSEL, SAID MEANS INCLUDING A NOZZLE EMITTING A CONE-SHAPE SPRAY PATTERN CHARACTERIZED BY AN INCLUDED CONE ANGLE $, SAID NOZZLE LOCATED FROM THE CENTER OF SAID VESSEL NO GREATER THAN THE DISTANCE R DEFINED BY THE EXPRESSION: R=R-2 TAN(#/2) WHEREBY CONTACT OF THE SPRAY PATTERN WITH THE VESSEL IS PREVENTED IN ORDER TOMINIMIZE CONDENSATION OF THE WATER.
Claim 3
Dependent Claim
94 words
The cooler as in claim 1, said spray means including a plurality of nozzles, each said nozzle emitting a cone-shaped spray pattern characterized by an included cone angle Phi and each said nozzle located from the center of said vessel no greater than the distance r defined by the expression: r R - 2 tan( Phi /2) said nozzles being located in a single horizontal plane perpendicular to the axis of the vessel and adjacent nozzles being separated by an angle theta measured about the center of the vessel and defined by the expression:
Claim 4
Dependent Claim
91 words
The cooler as in claim 1, and spray means including a plurality of nozzles, each said nozzle emitting a cone-shaped spray pattern characterized by an included cone angle Phi and each said nozzle located from the center of said vessel a distance r defined by the expression: r R - 2 tan( Phi /2) said nozzles being located in a single horizontal plane perpendicular to the axis of the vessel and adjacent nozzles being separated by an angle theta measured about the center of the vessel and defined by the expression:
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |