US3827102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soot blower with gas temperature or heat flow detecting means
Assignee: Babcock and Wilcox Co
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Filing: 1973-05-14
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Granted: 1974-08-06
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Expires: 1993-05-14
Abstract
Abstract A retractable soot blower is used as a temperature detector or a heat flow detector. The lance tube of the blower acts as a temperature or a total heat sensing probe in addition to performing its normal boiler cleaning function, and when inserted in the combustion chamber of a steam generator, boiler, or the like, the temperature of the pressurized blowing medium, or the total heat flow into the blowing medium, is determinable as a function of the pneumatic resistance of the discharging orifice of the lance tube. The detector is adapted to provide the heat flux profile of the chamber during movements of the lance tube, and can be utilized in conjunction with various control apparatus to selectively meter unvaporized water to the blowing medium during cleaning operations in response to changes in heat flow into the blowing medium.
Inventors
- 👤 E Adiutori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:06
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/14; G01K1/146
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A pneumatic resistance temperature detector for determining the heat flux in the combustion region of a boiler in combination with a retractable soot blower, said blower including a lance tube having a nozzle selectively locatable in said region and a blowing medium supply system including a feed tube having a first end connected to a source of pressurized fluid and telescopically engageable with an opposite end of said lance tube wherein the improvement comprises: first means for determining the pressure within said soot blower; and second means for metering the flow Rate of said pressurized fluid, whereby the heat flux is determinable as a function of the flow resistance of said nozzle.
Claim 2
Dependent Claim
112 words
A pneumatic resistance temperature detector for determining the heat flux in the combustion region of a boiler in combination with a retractable soot blower, said blower including a lance tube having a nozzle selectively locatable in said region and a blowing medium supply system including a feed tube having a first end connected to a source of pressurized fluid and telescopically engageable with an opposite end of said lance tube wherein the improvement comprises: first means for determining the pressure within said soot blower; and second means for metering the flow Rate of said pressurized fluid, whereby the heat flux is determinable as a function of the flow resistance of said nozzle.
Claim 3
Dependent Claim
27 words
The pneumatic resistance temperature detector as recited in claim 1 wherein said first means comprises a pressure sensor connected proximate said opposite end of said lance tube.
Claim 4
Dependent Claim
138 words
Apparatus for metering a selective quantity of unvaporized liquid to a pressurized gaseous medium used to clean the tubes of a boiler in combination with a retractable soot blower, said blower including a lance tube having a nozzle selectively locatable in the combustion chamber of the boiler and a flowing medium supply system including a feed tube having a first end connected to a source of pressurized fluid and telescopically engageable with an opposite end of said lance tube, wherein the improvement comprises: control means connected to said soot blower and providing a variable output signal in response to pressure changes at said nozzle; and valve means responsive to said variable output signal for metering a predetermined quantity of unvaporized liquid to said soot blower whereby the amount of unvaporized liquid discharged from the nozzle is selectively controllable.
Claim 5
Dependent Claim
138 words
Apparatus for metering a selective quantity of unvaporized liquid to a pressurized gaseous medium used to clean the tubes of a boiler in combination with a retractable soot blower, said blower including a lance tube having a nozzle selectively locatable in the combustion chamber of the boiler and a flowing medium supply system including a feed tube having a first end connected to a source of pressurized fluid and telescopically engageable with an opposite end of said lance tube, wherein the improvement comprises: control means connected to said soot blower and providing a variable output signal in response to pressure changes at said nozzle; and valve means responsive to said variable output signal for metering a predetermined quantity of unvaporized liquid to said soot blower whereby the amount of unvaporized liquid discharged from the nozzle is selectively controllable.
Claim 6
Dependent Claim
24 words
The apparatus as recited in claim 3 further comprising amplifying means located in said supply system for amplifying the pressure changes at said nozzle.
Claim 7
Dependent Claim
24 words
The apparatus as recited in claim 4 wherein said amplifying means includes an orifice located upstream of said feed tube in said supply system.
Claim 8
Dependent Claim
45 words
The apparatus as recited in claim 3 wherein said control means includes a controller responsive to said variable output signal, said controller including valve positioner means for selectively positioning said valve means whereby a selective quantity of unvaporized liquid is provided to said soot blower.
Claim 9
Dependent Claim
30 words
The apparatus as recited in claim 6 wherein said control means further includes a pressure transmitter operatively connected to said soot blower and providing said output signal to said controller.
References Cited (Backward Citations)
US2696631A
Cited
US3230568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |