US3558119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the injection of liquid fuels into blast furnaces
Assignee: Pont a Mousson SA
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Filing: 1968-12-04
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Granted: 1971-01-26
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Expires: 1988-12-04
Abstract
Abstract Liquid fuel injecting device for in particular a blast furnace comprising, in combination with the wind blowing nozzle and the tuyere, refractory elements arranged on a circle between the downstream end of the nozzle and the upstream end of the tuyere where they constitute the neck and divergent part of a Venturi structure, the convergent part being constituted by the nozzle. A liquid fuel supply conduit is carried by the nozzle and terminates in a sprayer disposed in the vicinity of and on the axis of the Venturi neck. Means are provided for imparting a gyratory motion to the wind blown by the nozzle.
Inventors
- 👤 Roger Demalander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16; C21B5/00; C21B5/001; F; F23; F23D; F23D17/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
124 words
A device for injecting liquid fuel into a shaft, and in particular into a blast furnace, said device comprising in combination a wind blowing nozzle and a tuyere in coaxial relation, refractory elements assembled in the form of a ring between the downstream end of said nozzle and the upstream end of the tuyere, relative to the direction in which said wind is blown, where they constitute a neck and a divergent part of a Venturi structure having upstream convergent part formed by said nozzle; a liquid fuel supply conduit carried by said nozzle and terminating in an injector located in the vicinity and on the axis of said neck; and means for imparting a gyratory motion to the wind blown through said nozzle.
Claim 2
Independent Claim
124 words
A device for injecting liquid fuel into a shaft, and in particular into a blast furnace, said device comprising in combination a wind blowing nozzle and a tuyere in coaxial relation, refractory elements assembled in the form of a ring between the downstream end of said nozzle and the upstream end of the tuyere, relative to the direction in which said wind is blown, where they constitute a neck and a divergent part of a Venturi structure having upstream convergent part formed by said nozzle; a liquid fuel supply conduit carried by said nozzle and terminating in an injector located in the vicinity and on the axis of said neck; and means for imparting a gyratory motion to the wind blown through said nozzle.
Claim 3
Dependent Claim
42 words
A device as claimed in claim 1, wherein said tuyere has a wide upstream entrance and said ring of refractory elements has a divergent internal profile in the form of a trumpet which is connected to said wide entrance of said tuyere.
Claim 4
Dependent Claim
82 words
A device as claimed in claim 1, comprising a refractory internal lining having large diameter upstream end and disposed in said tuyere, oblique slots which open out close to said large diameter end of said refractory lining and located in said ring of refractory elements on the joint between said ring and said refractory lining, said slots being adapted to be connected to a cold air supply conduit by way of a circular peripheral recess provided on said ring of refractory elements.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 1, wherein said means for imparting a gyratory motion to the wind comprises a diaphragm mounted within said nozzle and having blading the blades of which are oblique relative to the axis of said nozzle.
Claim 6
Dependent Claim
29 words
A device as claimed in claim 4, wherein said diaphragm is mounted at the upstream end of said nozzle, that is, at the large diameter end of said nozzle.
Claim 7
Dependent Claim
23 words
A device as claimed in claim 4, wherein said diaphragm has extending therethrough a sighting tube for observing the inside of said tuyere.
Claim 8
Dependent Claim
30 words
A device as claimed in claim 4, wherein said diaphragm comprises an axial hub having a dome-shaped upstream end and a tapered downstream end in the form of an ogive.
Claim 9
Dependent Claim
39 words
A device as claimed in claim 4, wherein said nozzle has a nose portion at the downstream end thereof and said diaphragm is mounted in the region of said nose, a cooling water passage being provided in said nose.
Claim 10
Dependent Claim
36 words
A device as claimed in claim 1, wherein said liquid fuel supply conduit is oblique relative to said nozzle and said injector has an outlet at the upstream end of said neck of said Venturi structure.
Claim 11
Dependent Claim
51 words
A device as claimed in claim 8, wherein said fuel supply conduit is bent at an angle which is highly inclined relative to the axis of said tuyere, and said injector is centered by said bladed diaphragm and has an outlet in the region of said neck of said Venturi structure.
Claim 12
Dependent Claim
39 words
A device as claimed in claim 1, comprising a flange on said tuyere for connecting said tuyere to said nozzle, said flange defining a socket having a part spherical inner face adapted to receive a nose of said nozzle.
Claim 13
Dependent Claim
19 words
A device as claimed in claim 1, wherein said nozzle has a nose cooled by a circulation of water.
Claim 14
Dependent Claim
17 words
A device as claimed in claim 1, wherein said nozzle Has a nose having internal refractory material.
Claim 15
Dependent Claim
21 words
A device as claimed in claim 1, wherein said tuyere has a bulb shape which is divergent in the upstream direction.
Claim 16
Dependent Claim
35 words
A device as claimed in claim 14, wherein said tuyere is very short and connected to said nozzle by a connecting element cooled by the circulation of water and provided with a part spherical socket.
Claim 17
Dependent Claim
29 words
A device as claimed in claim 15, wherein said nozzle is part spherical and said nose of said nozzle is also part spherical and applied against said connecting element.
Claim 18
Dependent Claim
99 words
A device as claimed in claim 16, wherein said part spherical nozzle comprises a wind supply pipe which is tangent to the inside of said nozzle and inclined relative to the axis of said nose of said nozzle at an angle in the neighborhood of 90*, whereby to constitute means for rotating said blown wind and progressively deflect the fluid stream through the inner part spherical walls of said nozzle in accordance with a whirl whose diameter diminishes towards the axis of said tuyere in moving away from said wind supply pipe towards said neck of said Venturi structure.
Claim 19
Dependent Claim
19 words
A device as claimed in claim 17, wherein said pipe tangent to said nozzle comprises a part spherical flange.
References Cited (Backward Citations)
US3166621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |