Patent US4957050A successfully refreshed from Google Patents.
US4957050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion process having improved temperature distribution
Assignee: Praxair Technology Inc
•
Filing: 1989-09-05
•
Granted: 1990-09-18
•
Expires: 2009-09-05
Abstract
Abstract A method for carrying out combustion in a combustion zone using oxygen or oxygen-enriched air as the oxidant wherein atomized liquid is provided to the combustion zone separate from oxidant and combustible vapors, causing it to be distributed throughout the combustion zone and then, especially after its vaporization, uniformly provided to the combustion reaction with consequent uniform temperature moderation, and resulting in reduced NO x generation and reduced refractory damage.
Inventors
- 👤 Min-Da Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:46
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08; F23G5/12; F23G5/008; F23L; F23L7/00; F23L7/007; F23G2203/00; F23G2203/20; F23L2900/00; F23L2900/07007; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
99 words
A combustion process comprising: (A) providing combustible vapor to a combustion zone: (B) providing oxidant, having an oxygen concentration of at least 25 percent, into the combustion zone separately from the provision of said combustible vapor at a high velocity sufficient to establish recirculating matter within the combustion zone; (C) providing atomized liquid into the combustion zone separately from said oxidant and said combustible vapor to provide coolant to the combustion zone and mixing coolant with recirculating matter; (D) mixing resulting coolant with said combustible vapor and/or oxidant; and (E) combusting the resulting combustible vapor with the resulting oxidant.
Claim 2
Dependent Claim
99 words
A combustion process comprising: (A) providing combustible vapor to a combustion zone: (B) providing oxidant, having an oxygen concentration of at least 25 percent, into the combustion zone separately from the provision of said combustible vapor at a high velocity sufficient to establish recirculating matter within the combustion zone; (C) providing atomized liquid into the combustion zone separately from said oxidant and said combustible vapor to provide coolant to the combustion zone and mixing coolant with recirculating matter; (D) mixing resulting coolant with said combustible vapor and/or oxidant; and (E) combusting the resulting combustible vapor with the resulting oxidant.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the combustion zone is within an incinerator.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the combustible vapor is provided to the combustion zone by volatilization from solid and/or liquid waste.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein the waste has a heating value exceeding 3000 BTU/lb.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the combustible vapor is provided to the combustion zone through a burner.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the oxidant has an oxygen concentration greater than 30 percent.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein the oxidant is technically pure oxygen.
Claim 9
Dependent Claim
60 words
The process of claim 1 wherein the oxidant is provided into the combustion zone at a velocity sufficient to achieve a recirculation ratio greater than 4 wherein the recirculation ratio is the ratio of the mass flowrate of material recirculated back toward the periphery of a jet to the mass flowrate of the total fluid input to the combustion zone.
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein the atomized liquid comprises at least 50 percent water.
Claim 11
Dependent Claim
11 words
The process of claim 1 wherein the atomized liquid is water.
Claim 12
Dependent Claim
16 words
The process of claim 1 wherein the atomized liquid does not substantially penetrate into the oxidant.
Claim 13
Dependent Claim
34 words
The process of claim 1 wherein the combustion zone has a major axial dimension and the oxidant passes through the combustion zone in a stream within 20 degrees of parallel to said axial dimension.
Claim 14
Dependent Claim
35 words
The process of claim 1 wherein the combustion zone has a major axial dimension and the atomized liquid is provided into the combustion zone a direction within 30 degrees of parallel to said axial dimension.
Claim 15
Dependent Claim
15 words
The process of claim 1 further comprising adjusting the injection direction of the atomized liquid.
Claim 16
Dependent Claim
16 words
The process of claim 1 further comprising adjusting the degree of atomization of the atomized liquid.
Claim 17
Dependent Claim
16 words
The process of claim 1 further comprising adjustinq the oxidant flowrate provided to the incineration zone.
Claim 18
Dependent Claim
15 words
The process of claim 1 wherein the oxidant and/or the atomized liquid flowrate are adjusted.
Claim 19
Dependent Claim
27 words
The process of claim 1 wherein the coolant contains some water and the combustion zone contains some halogen, further comprising the chemical reaction of water with halogen.
Claim 20
Dependent Claim
19 words
The process of claim 18 wherein the haloqen is provided to the combustion zone from solid and/or liquid waste.
Claim 21
Dependent Claim
18 words
The process of claim 1 wherein the combustible vapor is volatized from liquid provided to the combustion zone.
References Cited (Backward Citations)
US250602A
Cited
US289400A
Cited
FR2222906A6
Cited
US4199024A
Cited
JPS5274930A
Cited
US4186669A
Cited
US4496306A
Cited
US4257763A
Cited
US4618323A
Cited
US4411618A
Cited
JPS57164209A
Cited
US4462318A
Cited
US4475883A
Cited
US4476791A
Cited
US4577567A
Cited
US4630555A
Cited
US4598650A
Cited
US4693680A
Cited
US4863371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |