US3908904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic atomizer for waste sulfuric acid and use thereof in acid cracking furnaces
Assignee: Davy McKee AG
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Filing: 1973-10-12
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Granted: 1975-09-30
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Expires: 1993-10-12
Abstract
Abstract Ultrasonic atomizer nozzle assembly for atomizing waste sulfuric acid in a cracking furnace in which the acid feed stream is mechanically broken up by a stationary or rotating type atomizer into a coarse spray and an annullarly arranged ultrasonic generator further atomizes the coarse spray into microscopic particles. The ultrasonic generating gas is deflected into the ultrasonic resonance chamber and the coarse spray is either centrally or annularly positioned relative to the ultrasonic field. An annular gas buffer may be provided around the atomizer. The nozzle assembly is mounted in the ceiling of a furnace having a gas flow constricting member spaced from the ceiling 1-4 times the diameter of the furnace.
Inventors
- 👤 Walter Kerner
- 👤 Friedrich Mahler
- 👤 Heinrich Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/34; B; B01; B01J; B01J19/00; B01J19/08; B01J19/10; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0692; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/58; F23G; F23G7/00; F23G7/008
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
A method of atomizing in a furnace aqueous waste sulfuric acid containing suspended solids or dissolved salts which precipitate upon atomization of the acid which comprises the combination of steps of first mechanically converting a feed stream of the aqueous acid into a coarse spray and further atomizing the coarse spray by passing it through a field of ultrasonic sound.
Claim 2
Independent Claim
60 words
A method of atomizing in a furnace aqueous waste sulfuric acid containing suspended solids or dissolved salts which precipitate upon atomization of the acid which comprises the combination of steps of first mechanically converting a feed stream of the aqueous acid into a coarse spray and further atomizing the coarse spray by passing it through a field of ultrasonic sound.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein the frequency of the ultrasonic field is between 20 and 100 kilohertz.
Claim 4
Dependent Claim
38 words
A method according to claim 1 wherein the average particle size of the coarse spray is between 0.2 and 2 mm. and the average particle size of the further atomized spray is between 1 and 200 Mu .
Claim 5
Dependent Claim
19 words
A method according to claim 1 wherein the ultrasonic field is provided by steam at 0.6-10 atmospheres gauge pressure.
Claim 6
Dependent Claim
52 words
A method according to claim 1 wherein the frequency of the ultrasonic field is between 20 and 100 kilohertz and wherein the average particle size of the coarse spray is between 0.2 and 2 mm. and the average particle size of the further atomized spray is between 50 and 80 Mu .
Claim 7
Independent Claim
65 words
A method of atomizing acid solutions containing sulfur and also containing impurities of suspended solids or dissolved salts which precipitate upon atomization of the acid solution comprising developing an ultrasonic field in free space; converting a feed stream of the acid sulfur solution containing said impurities into a coarse spray; and ejecting said coarse spray containing said impurities into said electronic field in free space.
Claim 8
Independent Claim
65 words
A method of atomizing acid solutions containing sulfur and also containing impurities of suspended solids or dissolved salts which precipitate upon atomization of the acid solution comprising developing an ultrasonic field in free space; converting a feed stream of the acid sulfur solution containing said impurities into a coarse spray; and ejecting said coarse spray containing said impurities into said electronic field in free space.
Claim 9
Dependent Claim
80 words
A method according to claim 6, wherein said impurities have a diameter of up to substantially 0.5 mm and wherein said step of developing an ultrasonic field includes the step of passing steam through a central bore, and wherein said step of converting a feed stream into a coarse spray includes the step of feeding said feed stream through an annular space surrounding said central bore and through an annular exit slot having a maximum width of about 1 mm.
Claim 10
Dependent Claim
65 words
A method according to claim 6 wherein said impurities have a diameter of up to several millimeters and wherein the step of converting a field stream into a coarse spray includes the step of feeding said feed stream through a central bore and wherein said step of developing an ultrasonic field includes the step of passing steam through an annular space surrounding said central bore.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein said central bore has a maximum diameter of about 10 mm.
Claim 12
Dependent Claim
44 words
A method according to claim 8, wherein said step of converting a feed stream into a coarse spray also includes the step of forcing said feed stream against the inner surface of a cup rotating at a speed of about 4000 to 7000 r.p.m.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |