Patent US3844744A successfully refreshed from Google Patents.
US3844744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for discharging flue gases
Assignee: Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
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Filing: 1972-03-16
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Granted: 1974-10-29
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Expires: 1992-03-16
Abstract
Abstract Flue gases from a high-pressure blast furnace are led from above into a vertical duct terminating in a tubular nozzle with a downwardly converging section and an adjoining cylindrical (or prismatic) section respectively coacting with a tapering portion and a cylindrical (or prismatic) portion of an insert defining therewith a pressure-regulating gap of adjustable width and a substantially invariable throttling passage. A spray head in the duct above the insert irrigates the gases descending through the nozzle into a separating compartment in which they undergo a sharp change of direction whereby they are freed from accompanying solids wetted by the spray. The width of the regulating gap may be controlled by a pressure sensor actuating a solenoid to displace the insert.
Inventors
- 👤 G Hausberg
- 👤 K Hegemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/002; C21B2100/00; C21B2100/60; C21B2100/64; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
An apparatus for depressurizing high-pressure waste gases, comprising: a duct having an inlet connected to a source of waste gases to be depressurized, said duct terminating in a nozzle with a first section converging toward an outlet formed by an outwardly flared skirt and a elongated second section of substantially constant cross-section between said first section and said outlet; an insert received with all-around clearance in said nozzle, said insert having a tapering portion with a wider upstream end and a narrower downstream end defining with said first section a regulating gap of a width dePending upon the relative axial position of said insert and said nozzle, said insert further having an extension of substantially constant width axially adjoining said tapering portion at said narrower down-stream end and defining with said second section a restricted passage exerting upon said gases a throttling effect substantially independent of said axial position; and control means coupled to said insert for varying said relative axial position.
Claim 2
Independent Claim
162 words
An apparatus for depressurizing high-pressure waste gases, comprising: a duct having an inlet connected to a source of waste gases to be depressurized, said duct terminating in a nozzle with a first section converging toward an outlet formed by an outwardly flared skirt and a elongated second section of substantially constant cross-section between said first section and said outlet; an insert received with all-around clearance in said nozzle, said insert having a tapering portion with a wider upstream end and a narrower downstream end defining with said first section a regulating gap of a width dePending upon the relative axial position of said insert and said nozzle, said insert further having an extension of substantially constant width axially adjoining said tapering portion at said narrower down-stream end and defining with said second section a restricted passage exerting upon said gases a throttling effect substantially independent of said axial position; and control means coupled to said insert for varying said relative axial position.
Claim 3
Dependent Claim
49 words
An apparatus as defined in claim 1 wherein said control means comprises pressure-sensing means at said outlet and actuating means for said nozzle responsive to an output of said pressure-sensing means for displacing said insert in a sense tending to maintain a substantially constant gas pressure in said outlet.
Claim 4
Dependent Claim
21 words
An apparatus as defined in claim 1 wherein said passage has a minimum axial length substantially equaling that of said gap.
Claim 5
Dependent Claim
58 words
An apparatus as defined in claim 1 wherein said nozzle is provided with a third section ahead of said first section converging toward said outlet at substantially the same angle as said first section, said insert having another tapering portion defining with said third section another regulating gap of a width substantially equaling that of the first-mentioned gap.
Claim 6
Dependent Claim
14 words
An apparatus as defined in claim 1, further comprising flow-retarding means in said passage.
Claim 7
Dependent Claim
15 words
An apparatus as defined in claim 5 wherein said flow-retarding means comprises an apertured barrier.
Claim 8
Dependent Claim
19 words
An apparatus as defined in claim 5 wherein said flow-retarding means comprises an array of generally axially extending ribs.
Claim 9
Dependent Claim
21 words
An apparatus as defined in claim 7 wherein said ribs are helically pitched at a small angle to the axial direction.
Claim 10
Dependent Claim
38 words
An apparatus as defined in claim 8, further comprising guide vanes in said nozzle ahead of said gap, said guide vanes being inclined to the axial direction at a small angle opposite the pitch angle of said ribs.
Claim 11
Dependent Claim
24 words
An apparatus as defined in claim 1 wherein said nozzle is centered on a generally vertical axis, said outlet being located below said passage.
Claim 12
Dependent Claim
62 words
An apparatus as defined in claim 10, further comprising a separating compartment below said nozzle provided with an exit for said gases above the level of said outlet whereby said gases are deflected upon issuing from said nozzle, and spray means in said duct above said nozzle for wetting said gases to facilitate the shedding of moisture-laden solids therefrom in said compartment.
Claim 13
Dependent Claim
33 words
An apparatus as defined in claim 11 wherein said nozzle is further provided with a plurality of downwardly diverging sleeves in said outlet defining annular channels with one another and with said skirt.
Claim 14
Dependent Claim
23 words
An apparatus as defined in claim 12, further comprising narrow webs in said channels inclined at a small pitch angle to the vertical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |