US3726065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning flue gases of blast furnaces and the like
Assignee: Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
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Filing: 1971-10-12
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Granted: 1973-04-10
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Expires: 1991-10-12
Abstract
Abstract Flue gases from a high-pressure blast furnace are led from above through a dustbin to a wash tower containing several spray heads above a nozzle forming an annular accelerator gap of adjustable width. Adjustment of the gap width is carried out continuously, under the control of pressure sensors upstream and downstream of the gap, to maintain a constant output pressure, except with abnormally low flue-gas pressure in which case an alternate control circuit takes over to maintain a constant pressure differential across the gap. A group of such nozzles, in separate towers or in a common tower, may operate with different and mutually complementary pressure characteristics and may be selectively activated by an upstream pressure sensor whenever the flue-gas pressure fails within the linear range of its characteristic.
Inventors
- 👤 G Hausberg
- 👤 K Hegemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:32
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; C; C21; C21B; C21B7/00; C21B7/002; C21B7/007; C21B2100/00; C21B2100/40; C21B2100/44; C21B2100/60; C21B2100/64; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
An apparatus for cleaning high-pressure waste gases, comprising: at least one wash tower with inlet means for waste gases and outlet means for washed gas; partition means in said tower dividing same into an upstream compartment communicating with said inlet means and a downstream compartment communicating with said outlet means; spray means in said upstream compartment for wetting the incoming waste gases; flow-accelerating means in said partition means forming at least one throttled passage for the wetted gases to said downstream compartment; setting means coupled with said flow-accelerating means for varying the effective width of said passage; and pressure-sensing means in communication with the interior of said tower controlling said setting means for maintaining a substantially constant output pressure at said outlet means.
Claim 2
Independent Claim
123 words
An apparatus for cleaning high-pressure waste gases, comprising: at least one wash tower with inlet means for waste gases and outlet means for washed gas; partition means in said tower dividing same into an upstream compartment communicating with said inlet means and a downstream compartment communicating with said outlet means; spray means in said upstream compartment for wetting the incoming waste gases; flow-accelerating means in said partition means forming at least one throttled passage for the wetted gases to said downstream compartment; setting means coupled with said flow-accelerating means for varying the effective width of said passage; and pressure-sensing means in communication with the interior of said tower controlling said setting means for maintaining a substantially constant output pressure at said outlet means.
Claim 3
Dependent Claim
19 words
An apparatus as defined in claim 1, further comprising a dustbin inserted in the path of said inlet means.
Claim 4
Dependent Claim
47 words
An apparatus as defined in claim 1, further comprising switch means controlled by said pressure-sensing means for modifying the operation of said setting means in the presence of an abnormally low input pressure at said inlet means to maintain a substantially constant pressure differential across said passage.
Claim 5
Dependent Claim
46 words
An apparatus as defined in claim 1 wherein said flow-accelerating means comprises a plurality of flow accelerators disposed in parallel between said inlet means and said outlet means, said accelerators having different pressure characteristics with mutually complementary ranges of substantially linear response to said pressure-sensing means.
Claim 6
Dependent Claim
33 words
An apparatus as defined in claim 4 wherein said accelerators are arranged in said tower about a central vertical axis, said spray means composing a plurality of spray heads stacked along said axis.
Claim 7
Dependent Claim
40 words
An apparatus as defined in claim 4, further comprising switching means controlled by said pressure-sensing means in response to the waste-gas pressure for selectively activating only that accelerator whose linear range encompasses the momentary input pressure at said inlet means.
Claim 8
Dependent Claim
51 words
An apparatus as defined in claim 1 wherein said flow-accelerating means comprises a vertical nozzle traversing said partition means and a central body positioned with annular clearance in a constricted portion of said nozzle, said body being vertically movable with reference to said nozzle under the control of said setting means.
Claim 9
Dependent Claim
29 words
An apparatus as defined in claim 7 wherein said upstream compartment is located above said partition means, said constricted portion being disposed below the level of said partition means.
Claim 10
Dependent Claim
31 words
An apparatus as defined in claim 8 wherein said outlet is disposed laterally on said tower below said partition means but above the level of the lower end of said nozzle.
Claim 11
Dependent Claim
53 words
An apparatus as defined in claim 9, further comprising a water separator adjacent said tower in the form of a vertical cylinder with a centrally disposed downwardly open entrance port connected to said outlet means, a centrally disposed upwardly open exit port beneath said entrance port and a central deflector between said ports.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |