US4308241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of reactive droplet dispersion
Assignee: QUAD ENVIRONMENTAL TECHNOLOGIES CORP HIGHLAND PARK IL A CORP OF
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Filing: 1980-07-11
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Granted: 1981-12-29
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Expires: 2000-07-11
Abstract
Abstract A jet pump or ejector employing steam as the motive fluid is used to produce a dispersion of fog-like liquid droplets containing a reactive chemical in a gas stream. A solution of the reactive chemical is metered to the suction side of the ejector which discharges into the gas stream. Temperature and relative humidity of the gas stream are maintained at levels whereat the ejector discharge condenses to form very tiny liquid droplets containing the reactive chemical.
Inventors
- 👤 Egbert deVries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:33
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0416; B05B7/0433; B01; B01D; B01D53/00; B01D53/34; B01F; B01F23/00; B01F23/20; B01F23/21; B01F23/211; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3124; B01F25/31242; B01F25/31243; B01J; B01J19/00; B01J19/26; F; F04; F04F; F04F5/00; F04F5/14; F04F5/24; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00103; B01J2219/00121; B01J2219/00128; B01J2219/00164
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
112 words
A process for forming a fog-like dispersion of reagent-containing aqueous microdroplets in a gas stream which comprises: supplying steam as the motive gas to an ejector, said ejector adapted to accept a liquid suction stream; supplying an aqueous solution of a chemical reagent to the suction inlet of said ejector; evaporating said aqueous solution within said ejector to form a mixture of reagent and steam; discharging said mixture of reagent and steam from said ejector into a gas stream, and maintaining the temperature and relative humidity of said gas stream at levels whereat said ejector discharge condenses to form a dispersion of very finely divided, reagent-containing liquid droplets in said gas stream.
Claim 2
Dependent Claim
112 words
A process for forming a fog-like dispersion of reagent-containing aqueous microdroplets in a gas stream which comprises: supplying steam as the motive gas to an ejector, said ejector adapted to accept a liquid suction stream; supplying an aqueous solution of a chemical reagent to the suction inlet of said ejector; evaporating said aqueous solution within said ejector to form a mixture of reagent and steam; discharging said mixture of reagent and steam from said ejector into a gas stream, and maintaining the temperature and relative humidity of said gas stream at levels whereat said ejector discharge condenses to form a dispersion of very finely divided, reagent-containing liquid droplets in said gas stream.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said gas stream contains a gaseous contaminant reactive toward said reagent.
Claim 4
Dependent Claim
24 words
The process of claim 2 wherein liquid droplets containing the reaction product of said reagent with said contaminant are separated from said gas stream.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein said gas stream is essentially saturated with respect to water vapor prior to mixing with said ejector discharge.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein said gas stream is conditioned and humidified by passing it through a water spray.
Claim 7
Dependent Claim
26 words
The process of claim 2 wherein said gas stream temperature is more than 25° F. lower than the temperature of the steam discharging from said ejector.
Claim 8
Dependent Claim
38 words
The process of claim 2 wherein steam is supplied to said ejector at a rate sufficient to provide a liquid droplet concentration in the gas stream after condensation of at least about 0.01 gallons per 1000 cubic feet.
Claim 9
Dependent Claim
22 words
The process of claim 7 wherein the weight ratio of steam to aqueous reagent supplied to said ejector is greater than 2.
Claim 10
Dependent Claim
23 words
The process of claim 2 where the reagent containing liquid droplets as in contact with said gas stream for more than 0.5 seconds.
Claim 11
Dependent Claim
25 words
The process of claim 9 wherein the reagent contained in said liquid droplets is in stoichiometric excess relative to the contaminant in said gas stream.
Claim 12
Dependent Claim
16 words
The process of claim 2 wherein said gas stream contains suspended particulate matter of aerosol size.
Claim 13
Dependent Claim
17 words
The process of claim 2 wherein said contaminant is odorous and said reagent is an oxidizing agent.
Claim 14
Dependent Claim
12 words
The process of claim 12 wherein said oxidizing agent is sodium hypochloride.
Claim 15
Dependent Claim
16 words
The process of claim 2 wherein said contaminant is acidic and wherein said reagent is alkaline.
Claim 16
Dependent Claim
28 words
The process of claim 14 wherein said acidic contaminant is sulfur dioxide and wherein said reagent is selected from the group consisting of sodium hydroxide and sodium carbonate.
Claim 17
Dependent Claim
16 words
The process of claim 2 wherein said contaminant is odorous and wherein said reagent is acidic.
References Cited (Backward Citations)
US2532554A
Cited
US3375058A
Cited
US3421699A
Cited
US3885918A
Cited
US3852408A
Cited
US3852409A
Cited
US4125589A
Cited
US4083932A
Cited
US4141702A
Cited
US4225566A
Cited
US4172880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |