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US3857672A Expired / Lapsed US ⏱️ 0.0 years remaining

Tri-fuel burner for process gases

Assignee: KGI Inc
•
Filing: 1973-12-26
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Granted: 1974-12-31
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Expires: 1993-12-26
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Abstract

Abstract This abstract describes a type of burner in which gaseous or liquid fuel is used to provide a high temperature environment, with excess air, into which a low heat value ''''lean'''' gas can be introduced to be burned. It comprises a cylindrical housing lined with refractory, having a closed end and an open end, adapted to be inserted into a furnace wall. Liquid fuel burner means can be inserted into the closed end and/or gaseous fuel can be introduced in a tangential rotary manner, with excess combustion air introduced through ports in the closed end of the housing. Combustion of these fuels provides a high temperature gaseous environment into which the lean gas can be introduced, in a tangential manner, downstream, so that the lean gas will be burned with the excess air provided.

Inventors

  • 👤 R Reed
  • 👤 H Goodnight

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 02:02
CPC Classifications
F; F23; F23D; F23D17/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 141 words
A burner for the forced burning of low heat value gases comprising: a. a cylindrical metal housing with horizontal axis and refractory lining, said housing closed at a first end and adapted to be attached to a furnace wall at a second end, said refractory lining having three steps of diameter; b. combustion air inlet means for the longitudinal introduction of combustion air at a first diameter through an annular port in said closed end; c. fuel gas introduction means for the tangential introduction of fuel gas under pressure at a second, larger diameter, axially displaced from said combustion air inlet means; and d. lean gas introduction means for the tangential introduction of low heat value gas at a third, larger diameter, displaced axially from said fuel gas introduction means, said third diameter continuing for the remaining length of said housing.
Claim 2
Dependent Claim 141 words
A burner for the forced burning of low heat value gases comprising: a. a cylindrical metal housing with horizontal axis and refractory lining, said housing closed at a first end and adapted to be attached to a furnace wall at a second end, said refractory lining having three steps of diameter; b. combustion air inlet means for the longitudinal introduction of combustion air at a first diameter through an annular port in said closed end; c. fuel gas introduction means for the tangential introduction of fuel gas under pressure at a second, larger diameter, axially displaced from said combustion air inlet means; and d. lean gas introduction means for the tangential introduction of low heat value gas at a third, larger diameter, displaced axially from said fuel gas introduction means, said third diameter continuing for the remaining length of said housing.
Claim 3
Dependent Claim 30 words
The burner as in claim 1 including liquid fuel burner means on the first end of said housing, at its axis, said liquid fuel burner including primary combustion air means.
Claim 4
Dependent Claim 32 words
The burner as in claim 1 in which the rotary direction of introduction of said fuel gas is the same as the rotary direction of introduction of said low heat valve gas.
Claim 5
Dependent Claim 31 words
The burner as in claim 1 in which the rotary direction of introduction of said fuel gas is opposite to the rotary direction of introduction of said low heat value gas.

References Cited (Backward Citations)

US3105540A Cited
US3106955A Cited
US3195608A Cited
US3244220A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-30 1978-07-01 1978-12-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-30 1982-07-01 1982-12-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-30 1986-07-01 1986-12-31 $7700.00 Window Closed / Lapsed

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