US4033407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger cleaning system
Assignee: Occidental Chemical Corp
•
Filing: 1975-09-02
•
Granted: 1977-07-05
•
Expires: 1995-09-02
Abstract
Abstract The present invention relates to a method for more efficiently operating a heat exchanger wherein heat is exchanged between a scale-forming and a scale-cleaning liquid. The scale-cleaning liquid is passed periodically into the region of the heat exchanger wherein scale from the scale-forming liquid has accumulated, and the effluent is flushed from the heat exchanger.
Inventors
- 👤 Robert L. Quintilliano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:12
CPC Classifications
F; F28; F28G; F28G9/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
In a method for operating a brine heat exchanger comprising a heat exchange region through which pass in heat exchange relationship from a first liquid influent line a hot acidulated solution of chlorine in water possessing scale-cleaning properties and from a second liquid influent line a second liquid comprising brine and possessing scale-forming properties, a first liquid effluent line, and a second liquid effluent line, the improvement wherein said solution of chlorine in water is periodically passed into the second liquid influent line of said heat exchange region and then through said heat exchanger for sufficient time to remove scale produced by said second liquid.
Claim 2
Dependent Claim
105 words
In a method for operating a brine heat exchanger comprising a heat exchange region through which pass in heat exchange relationship from a first liquid influent line a hot acidulated solution of chlorine in water possessing scale-cleaning properties and from a second liquid influent line a second liquid comprising brine and possessing scale-forming properties, a first liquid effluent line, and a second liquid effluent line, the improvement wherein said solution of chlorine in water is periodically passed into the second liquid influent line of said heat exchange region and then through said heat exchanger for sufficient time to remove scale produced by said second liquid.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the heat exchanger is a titanium plate heat exchanger.
Claim 4
Dependent Claim
53 words
The method of claim 1 wherein said second liquid is introduced into and conducted from said heat exchanger through steel piping, and said solution of chlorine in water is introduced into and conducted from said heat exchanger through a corrosion resistant piping substantially inert to an acidulated solution of hot chlorine in water.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein said corrosion resistant piping is a thermoset unsaturated polyester resin.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein said solution emerges from said heat exchange region and is conducted by means of a valved pipe to said first liquid effluent line.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein said solution is conducted out of said heat exchanger into said second liquid effluent line.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said solution is conducted out of said heat exchanger into a collecting receptacle.
Claim 9
Dependent Claim
84 words
In a method for operating a titanium plate heat exchanger through which pass in heat exchange relationship a first liquid comprising an acidulated solution of chlorine in water and a second liquid comprising brine, the improvement wherein said first liquid is introduced into and conducted from said heat exchanger through thermoset unsaturated polyester resin piping and is periodically passed into the region of said heat exchanger wherein said second liquid is normally passed for sufficient time to remove scale produced by said second liquid.
Claim 10
Dependent Claim
84 words
In a method for operating a titanium plate heat exchanger through which pass in heat exchange relationship a first liquid comprising an acidulated solution of chlorine in water and a second liquid comprising brine, the improvement wherein said first liquid is introduced into and conducted from said heat exchanger through thermoset unsaturated polyester resin piping and is periodically passed into the region of said heat exchanger wherein said second liquid is normally passed for sufficient time to remove scale produced by said second liquid.
Claim 11
Dependent Claim
113 words
In a method for operating a brine heat exchanger in which feed brine for an electrolytic cell is preheated by incoming hot acidic chlorine water, said heat exchanger comprising a heat exchange region through which pass in heat exchange relationship from a first liquid influent line, a hot solution of chlorine in water, and from a second liquid influent line brine possessing scale-forming properties, a first liquid effluent line, and a second liquid effluent line, the improvement wherein said hot acidic chlorine water is periodically passed into the second liquid influent line of said heat exchange region and then through said heat exchanger for sufficient time to remove scale produced by said brine.
Claim 12
Dependent Claim
113 words
In a method for operating a brine heat exchanger in which feed brine for an electrolytic cell is preheated by incoming hot acidic chlorine water, said heat exchanger comprising a heat exchange region through which pass in heat exchange relationship from a first liquid influent line, a hot solution of chlorine in water, and from a second liquid influent line brine possessing scale-forming properties, a first liquid effluent line, and a second liquid effluent line, the improvement wherein said hot acidic chlorine water is periodically passed into the second liquid influent line of said heat exchange region and then through said heat exchanger for sufficient time to remove scale produced by said brine.
References Cited (Backward Citations)
US2328837A
Cited
US2490750A
Cited
US2490759A
Cited
US2488598A
Cited
US2576843A
Cited
US2647570A
Cited
US2707991A
Cited
US2788065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |