US5039425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of compressed air discharge condensate
Assignee: Deltech Engineering Inc
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Filing: 1990-01-11
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Granted: 1991-08-13
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Expires: 2010-01-11
Abstract
Abstract A process for separating emulsified, suspended and separate oil as well as other contaminants from the water phase of a compressed air system condensate comprises the steps of discharging air and condensate from a compressed air system into a water filled separation tank where air is separated from the condensate. Some of the contaminants heavier than water are allowed to settle to the bottom of the separation tank while lighter oil contaminants are allowed to float to the surface where they are removed. Water and the remaining contaminants which did not flow to the surface or settle to the bottom of the tank are drained away until a given amount of liquid mass has been accumulated. Pressure applied to the liquid mass forces the mass into and through an underwater coalescing media. Such action causes substantially all of the remaining oil constituents to coalesce and thereby form a floating oil phase while other contaminants are retained by the coalescing media. The floating oil phase is removed and the remaining water is relatively pure.
Inventors
- 👤 John R. Caris
- 👤 Robert M. Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:52
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/12; B01D17/02; B01D17/0208; B01D17/04; B01D17/045; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
221 words
A process for separating emulsified, suspended and separate oil as well as other contaminants such as dirt, scale, rust and the like from the water of a compressed air system condensate, the process comprising the steps of discharging air and condensate from a compressed air system into a water filled separation tank where air is separated from the condensate, allowing at least some of the contaminants heavier than water to settle to the bottom of the separation tank while at least some of the lighter oil contaminants are allowed to float to the surface of the tank, removing the floating oil contaminants from the surface of the separation tank, draining away from the separation tank at least a portion of the water and remaining contaminants which did not float to the surface or settle to the bottom of the tank and accumulating said drained water and contaminants in a pressure vessel until a given amount has been accumulated, applying compressed gas pressure to the accumulated water and contaminants in said pressure vessel, forcing the accumulated water and contaminants therein into and through a coalescing media by the compressed gas pressure applied thereto whereby substantially all of the remaining oil constituents coalesce to form a floating oil phase while other contaminants are retained by the media, and removing the floating oil phase.
Claim 2
Dependent Claim
221 words
A process for separating emulsified, suspended and separate oil as well as other contaminants such as dirt, scale, rust and the like from the water of a compressed air system condensate, the process comprising the steps of discharging air and condensate from a compressed air system into a water filled separation tank where air is separated from the condensate, allowing at least some of the contaminants heavier than water to settle to the bottom of the separation tank while at least some of the lighter oil contaminants are allowed to float to the surface of the tank, removing the floating oil contaminants from the surface of the separation tank, draining away from the separation tank at least a portion of the water and remaining contaminants which did not float to the surface or settle to the bottom of the tank and accumulating said drained water and contaminants in a pressure vessel until a given amount has been accumulated, applying compressed gas pressure to the accumulated water and contaminants in said pressure vessel, forcing the accumulated water and contaminants therein into and through a coalescing media by the compressed gas pressure applied thereto whereby substantially all of the remaining oil constituents coalesce to form a floating oil phase while other contaminants are retained by the media, and removing the floating oil phase.
Claim 3
Dependent Claim
40 words
A process as in claim 1 including the further steps of flowing the liquid discharge from the coalescing media through an adsorption media to remove any uncoalescable oil therefrom, and drawing water relatively free of contaminants from the adsorption media.
Claim 4
Dependent Claim
48 words
A process as in claim 1 wherein the floating oil contaminants on the surface of the separation tank are removed by a motor driven wheel rotating through the water and picking up the oil on the wheel surface, and removing the oil from the wheel surface by scraping.
Claim 5
Dependent Claim
32 words
A process as in claim 1 wherein centrifugal forces are imparted to the air and condensate discharged into the separation tank to assist in separating air and some oil from the condensate.
Claim 6
Dependent Claim
48 words
A process as in claim 1 including the steps of sensing the back pressure on the coalescing media as the accumulated water and contaminants are forced therethrough by the applied pressure, and increasing the applied pressure when the back pressure on the coalescing media exceeds a predetermined amount.
Claim 7
Dependent Claim
17 words
A process as in claim 1 wherein the coalescing media is operated at least partially under water.
References Cited (Backward Citations)
US748981A
Cited
USRE20227E
Cited
US1702612A
Cited
US2010435A
Cited
US2782929A
Cited
US3358838A
Cited
US3450632A
Cited
US3471401A
Cited
US3558482A
Cited
US3844743A
Cited
US3804252A
Cited
US4201665A
Cited
US4203843A
Cited
JPS5615931A
Cited
US4424068A
Cited
EP0184691A2
Cited
US4684467A
Cited
US4888117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |