US3854908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for discharging flue gases from blast furnaces and the like
Assignee: Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
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Filing: 1973-03-28
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Granted: 1974-12-17
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Expires: 1993-03-28
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 stem of the insert, rising within that separating compartment, carries an apertured barrier spaced from the nozzle outlet with a clearance whose width varies inversely with that of the pressure-regulating gap.
Inventors
- 👤 G Hausberg
- 👤 K Hegemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/007; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
An apparatus for depressurizing high-pressure waste gases, comprising: a separating compartment provided with an exit port; 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 which opens into said compartment and an elongated second section of substantially constant cross-section between said first section and said outlet; an insert extending coaxially with all-around clearance into said nozzle from said compartment, 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 a substantially straight part axially adjoining said narrower downstream end of said tapering portion and defining with said second section a restricted passage of substantially constant width exerting upon said gases a throttling effect substantially independent of said axial position; turbulence-generating means surrounding said insert straight section downstream of said gap; and control means for varying said relative axial position, said turbulence-generating means comprising a perforated barrier with several levels of relatively offset perforations in said passage.
Claim 2
Independent Claim
199 words
An apparatus for depressurizing high-pressure waste gases, comprising: a separating compartment provided with an exit port; 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 which opens into said compartment and an elongated second section of substantially constant cross-section between said first section and said outlet; an insert extending coaxially with all-around clearance into said nozzle from said compartment, 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 a substantially straight part axially adjoining said narrower downstream end of said tapering portion and defining with said second section a restricted passage of substantially constant width exerting upon said gases a throttling effect substantially independent of said axial position; turbulence-generating means surrounding said insert straight section downstream of said gap; and control means for varying said relative axial position, said turbulence-generating means comprising a perforated barrier with several levels of relatively offset perforations in said passage.
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
32 words
An apparatus as defined in claim 1 wherein said turbulence-generating means includes an apertured barrier with several levels of relatively offset apertures on an extension of said insert downstream of said nozzle.
Claim 6
Dependent Claim
32 words
An apparatus as defined in claim 4 wherein said barrier is spaced from said outlet by a narrow clearance varying in width inversely with said gap upon operation of said control means.
Claim 7
Dependent Claim
52 words
An apparatus as defined in claim 3 wherein said nozzle enters said compartment from above and is centered on a generally vertical axis, said outlet being located below said passage, said exit port extending laterally from said compartment with a substantially horizontal axia above the level of the underside of said barrier.
Claim 8
Dependent Claim
32 words
An apparatus as defined in claim 6, further comprising 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 9
Dependent Claim
90 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, and a fourth section of substantially constant cross-section between said first and third sections; 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, and another substantially cylindrical part defining with said fourth section another restricted passage of substantially invariable throttling effect.
Claim 10
Dependent Claim
20 words
An apparatus as defined in clAim 8 wherein said flow-retarding means comprises a perforated barrier in each of said passages.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |