US3901643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-pressure activated purge gas flow system for flares
Assignee: KGI Inc
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Filing: 1974-08-30
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Granted: 1975-08-26
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Expires: 1994-08-30
Abstract
Abstract A system for supplying purge gas to a flare system depending upon the temperature and the pressure in the flare, to control the flow of purge gas through the flare during the period when flaring of gas is discontinued. The rate of flow of purge gas is determined by temperature measuring means. However, the control of flow depends upon the pressure in the flare as well as the temperature so that when gas is being flared and the temperature is high and the pressure is above normal the purge gas is cut off, whereas when the temperature is high and the pressure is normal the purge gas is flowed.
Inventors
- 👤 Robert D Reed
- 👤 John S Zink
- 👤 Robert E Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:34
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/025; F23G; F23G7/00; F23G7/06; F23G7/08; F23G7/085; F23G2207/00; F23G2207/10; F23G2207/101; F23G2207/102; F23G2208/00; F23G2208/10; F25; F25J; F25J2210/00; F25J2210/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
The temperature-pressure activiated purge gas flow system for waste gas flares comprising; a. a flare gas system including flare stack conduit means to introduce flare gas into said stack, piLot ignition means and means to introduce purge gas into said system; b. means to measure the temperature and the pressure in said flare gas system and to determine the temperature difference between said temperature and a selected ambient temperature; and c. means responsive to said temperature difference and to said pressure to control the flow of purge gas into said flare gas system.
Claim 2
Dependent Claim
93 words
The temperature-pressure activiated purge gas flow system for waste gas flares comprising; a. a flare gas system including flare stack conduit means to introduce flare gas into said stack, piLot ignition means and means to introduce purge gas into said system; b. means to measure the temperature and the pressure in said flare gas system and to determine the temperature difference between said temperature and a selected ambient temperature; and c. means responsive to said temperature difference and to said pressure to control the flow of purge gas into said flare gas system.
Claim 3
Dependent Claim
24 words
The system as in claim 1 including control valve means responsive to said means to control the flow of purge gas into said system.
Claim 4
Dependent Claim
24 words
The system as in claim 2 in which, when said temperature difference is greater than a selected value, said control valve tends to open.
Claim 5
Dependent Claim
24 words
The system as in claim 3 in which when said pressure is higher than a selected valve, said control valve is prevented from opening.
Claim 6
Dependent Claim
24 words
The system as in claim 3 in which, when said pressure is lower than a selected valve, said control valve is permitted to open.
Claim 7
Dependent Claim
18 words
The system as in claim 2 in which said control valve is controlled proportionately by said temperature difference.
Claim 8
Dependent Claim
25 words
The system as in claim 1 including water trap means between said conduit means to introduce flare gas into said stack, and said flare stack.
Claim 9
Dependent Claim
21 words
The system as in claim 7 including in addition means to maintain a selected minimum gas pressure in said conduit means.
Claim 10
Dependent Claim
14 words
The system as in claim 7 including means for maintenance of said water trap.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |