Patent US3722185A successfully refreshed from Google Patents.
US3722185A
Expired / Lapsed
US
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Gas scrubbing method and apparatus
Assignee: Fisher Klosterman Inc
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Filing: 1971-06-09
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Granted: 1973-03-27
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Expires: 1991-06-09
Abstract
Abstract Apparatus is provided for utilizing a liquid flow to remove particulate solids such as dust from industrial gases. The apparatus includes a contacting chamber having means therewith for providing a continuous water wash-down in the form of a substantially downward water sheet concentric to the chamber inner surface. Provision is made for dust-laden gas to enter the chamber tangentially and thereafter flow upwardly in a helical path whereby dust particles are centrifugally driven into the concentric water sheet. A means is provided inwardly adjacent the tangential inlet to substantially increase the efficiency of dust removal from the flowing gas. The latter means makes possible the attainment of performance, in a medium energy gas scrubbing apparatus, favorably comparable to a high energy and relatively expensive venturi scrubber apparatus.
Inventors
- 👤 G Miczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:01
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
337 words
Apparatus for contacting a gas flow with a liquid flow to remove particulate solids from the gas flow, comprising: a. an elongated cylindrical contacting chamber disposed with its longitudinal axis extending vertically and having a primary contacting section and a secondary contacting section, b. the primary contacting section being located substantially adjacent the lower end of said chamber, with the secondary contacting section being the portion of said chamber above said primary contacting section, c. said secondary contracting section having a gas flow outlet means at its upper end for exhausting said gas flow therefrom, d. a liquid flow inlet means at the upper end of said secondary contacting section adapted to provide a liquid flow that washes downwardly through said chamber against the side wall thereof, e. a liquid flow outlet means below said primary contacting section for discharging said liquid flow from the chamber, f. gas flow inlet means disposed generally laterally to said primary contacting section for directing said gas flow thereto whereby said secondary contacting section receives said gas flow from said primary contacting section, g. means located in said primary contacting section for effecting Said liquid flow moving therethrough and for effecting said gas flow immediately upon its entrance thereto, h. said effecting means including first and second rigid ringlike annular members disposed generally concentric to said chamber''s longitudinal axis, i. each of said ring-like members being generally planar in cross section and having an outer peripheral edge fastened in firm abutment against said chamber side wall and being extended radially-inwardly toward said chamber''s longitudinal axis such that each of said members forms a ledge that intersects the liquid flow moving downwardly over said side wall, j. said ring-like members being vertically spaced apart whereby, in conjunction with a portion of said chamber side wall therebetween, an annular flow channel is defined between said ring-like members, and k. said channel being disposed relative to said gas flow inlet means such that said gas flow entering said chamber flows initially in said channel.
Claim 2
Dependent Claim
337 words
Apparatus for contacting a gas flow with a liquid flow to remove particulate solids from the gas flow, comprising: a. an elongated cylindrical contacting chamber disposed with its longitudinal axis extending vertically and having a primary contacting section and a secondary contacting section, b. the primary contacting section being located substantially adjacent the lower end of said chamber, with the secondary contacting section being the portion of said chamber above said primary contacting section, c. said secondary contracting section having a gas flow outlet means at its upper end for exhausting said gas flow therefrom, d. a liquid flow inlet means at the upper end of said secondary contacting section adapted to provide a liquid flow that washes downwardly through said chamber against the side wall thereof, e. a liquid flow outlet means below said primary contacting section for discharging said liquid flow from the chamber, f. gas flow inlet means disposed generally laterally to said primary contacting section for directing said gas flow thereto whereby said secondary contacting section receives said gas flow from said primary contacting section, g. means located in said primary contacting section for effecting Said liquid flow moving therethrough and for effecting said gas flow immediately upon its entrance thereto, h. said effecting means including first and second rigid ringlike annular members disposed generally concentric to said chamber''s longitudinal axis, i. each of said ring-like members being generally planar in cross section and having an outer peripheral edge fastened in firm abutment against said chamber side wall and being extended radially-inwardly toward said chamber''s longitudinal axis such that each of said members forms a ledge that intersects the liquid flow moving downwardly over said side wall, j. said ring-like members being vertically spaced apart whereby, in conjunction with a portion of said chamber side wall therebetween, an annular flow channel is defined between said ring-like members, and k. said channel being disposed relative to said gas flow inlet means such that said gas flow entering said chamber flows initially in said channel.
Claim 3
Dependent Claim
46 words
The invention of claim 1 wherein said effecting means further includes a third rigid ring-like member disposed between and spaced apart from said first and second ring-like members such that a pair of said annular channels, one above the other, is defined by said ring-like members.
Claim 4
Dependent Claim
61 words
The invention of claim 1, wherein said gas flow inlet means is oriented to deliver said gas flow into said channel in a direction tangential to the circumference of said chamber such that said gas flow, while in said primary contacting section, maintains a horizontal and circular orientation, and thereafter follows a pathway that spirals upwardly through said secondary contacting section.
Claim 5
Dependent Claim
31 words
The invention of claim 1 further including means for increasing the velocity of said gas flow at a point preceding the initial contact of said gas flow with said liquid flow.
Claim 6
Dependent Claim
48 words
The invention of claim 1 wherein said liquid inlet means is adapted to inject said liquid flow into said chamber in a direction tangential to said chamber''s circumference whereby said liquid flow follows a downwardly spiralling path against said chamber''s side wall and circumjacent said chamber''s longitudinal axis.
Claim 7
Dependent Claim
131 words
The invention of claim 1 wherein said gas flow inlet means is oriented to deliver said gas flow into said channel in a direction tangential to the circumference of said chamber such that said gas flow, while in said primary contacting section, maintains a horizontal and circular orientation and thereafter follows a pathway that spirals upwardly through said secondary contacting section, said liquid inlet means is adapted to deliver said liquid flow into said chamber in a direction tangential to said chamber''s circumference whereby said liquid flow follows a downwardly spiralling pathway against said chamber''s side wall and circumjacent said chamber''s longitudinal axis, and said pathways of said gas flow and said liquid flow spiral concurrently relative to the longitudinal axis of said chamber while progressing vertically away from each other.
Claim 8
Dependent Claim
108 words
The invention of claim 1 wherein said gas flow outlet means comprises a substantially large opening in the upper end of said casing, an annular collar portion communicates with said large opening and extends downwardly into said secondary contacting section, the diameter of said casing being sufficiently greater than the diameter of said collar portion that an annular pocket area is defined between said collar and said casing, and said liquid flow inlet means is adapted to deliver said liquid flow initially into said pocket area whereby said liquid flow follows a circular and horizontal pathway in said pocket area before progressing downwardly through said secondary contacting section.
Claim 9
Dependent Claim
106 words
Apparatus as defined in claim 1 wherein said effecting means comprises a plurality of said ring-like members oriented to define a series of said channels in a vertically successive arrangement, said gas flow inlet means includes a vertically-elongated opening in the chamber''s sidE wall, said opening has a substantially rectilinear configuration, and said ring-like members, in conjunction with the portions of said chamber''s side wall defining said channels, have a combined exposed surface area such that the distance of travel of said downward liquid flow thereacross is at least one and one-half times the distance taken vertically between the upper and lower edges of said opening.
Claim 10
Dependent Claim
22 words
Apparatus as defined in claim 8 wherein the lateral dimension of said opening is less than one-fifth of said opening''s longitudinal dimension.
Claim 11
Dependent Claim
31 words
The invention of claim 8 wherein each of said members has a portion cut away in the area of said opening whereby none of said members extends directly across said opening.
Claim 12
Dependent Claim
18 words
The invention of claim 10 wherein the uppermost of said ring-like members has a portion overhanging said opening.
Claim 13
Dependent Claim
223 words
Apparatus for contacting a gas flow with a liquid flow to remove dust particles from the gas flow, including: a. a vertically-extending cylindrical contacting chamber, b. a liquid flow inlet means in the upper end of said chamber adapted to direct said liquid flow to wash down the entire inner surface of said chamber, c. a liquid flow outlet means in the lower end of said chamber adapted to discharge dust-laden liquid therefrom, d. a gas flow outlet means in the upper end of said chamber for exhausting said gas flow therefrom after said dust particles have been substantially removed from said gas flow, e. a tangentially-oriented gas inlet disposed toward the lower end of said chamber and adapted to provide a gas flow that traces an upwardly-spiralling pathway against said inner surface of the chamber whereby particles in said gas flow are centrifugally driven into said liquid flow, f. flow controlling structure located within said chamber in a position horizontally adjacent said gas inlet, and being adapted to significantly effect both said liquid flow and said gas flow, g. said flow controlling structure defining at least a first horizontal annular flow chamber that receives said gas flow from said gas inlet, and h. said structure also being adapted to cause said liquid flow to form a water curtain across said gas inlet.
Claim 14
Dependent Claim
223 words
Apparatus for contacting a gas flow with a liquid flow to remove dust particles from the gas flow, including: a. a vertically-extending cylindrical contacting chamber, b. a liquid flow inlet means in the upper end of said chamber adapted to direct said liquid flow to wash down the entire inner surface of said chamber, c. a liquid flow outlet means in the lower end of said chamber adapted to discharge dust-laden liquid therefrom, d. a gas flow outlet means in the upper end of said chamber for exhausting said gas flow therefrom after said dust particles have been substantially removed from said gas flow, e. a tangentially-oriented gas inlet disposed toward the lower end of said chamber and adapted to provide a gas flow that traces an upwardly-spiralling pathway against said inner surface of the chamber whereby particles in said gas flow are centrifugally driven into said liquid flow, f. flow controlling structure located within said chamber in a position horizontally adjacent said gas inlet, and being adapted to significantly effect both said liquid flow and said gas flow, g. said flow controlling structure defining at least a first horizontal annular flow chamber that receives said gas flow from said gas inlet, and h. said structure also being adapted to cause said liquid flow to form a water curtain across said gas inlet.
Claim 15
Dependent Claim
40 words
The invention of claim 12 wherein said flow control structure comprises a plurality of annular members disposed in a vertically-successive spaced-apart arrangement such that one or more horizontal annular flow channels are defined, at vertically-successive levels, by said annular members.
Claim 16
Dependent Claim
33 words
The invention of claim 12 wherein a section of each of said members, in the area adjacent said gas inlet, is removed such that none of said members extends across said gas inlet.
Claim 17
Dependent Claim
47 words
The invention of claim 14 wherein a portion of the uppermost of said members terminates above said gas inlet and is adapted to effect said liquid flow whereby a secondary liquid curtain is caused to form at an angle to said liquid curtain across said gas inlet.
Claim 18
Independent Claim
157 words
A method of improving the efficiency of dust particle removal from a gas flow in an apparatus for contacting a gas flow with a liquid flow to remove dust particles from the gas flow of the type having a vertically-extending cylindrical contacting chamber with liquid flow inlet means on the upper end thereof and a liquid flow outlet means in the lower end thereof, gas flow outlet means in the upper end thereof, and a tagentially-oriented gas inlet for providing a gas flow into the lower end of the chamber that moves upwardly therethrough whereby dust particles are transferred from said gas flow to said liquid flow, said method comprising the steps of: increasing the velocity of said gas flow as it enters said chamber, temporarily confining said gas flow to a substantially horizontal pathway upon entrance to said chamber, and increasing liquid flow accumulation in the area of said horizontal pathway and across said gas inlet.
Claim 19
Independent Claim
157 words
A method of improving the efficiency of dust particle removal from a gas flow in an apparatus for contacting a gas flow with a liquid flow to remove dust particles from the gas flow of the type having a vertically-extending cylindrical contacting chamber with liquid flow inlet means on the upper end thereof and a liquid flow outlet means in the lower end thereof, gas flow outlet means in the upper end thereof, and a tagentially-oriented gas inlet for providing a gas flow into the lower end of the chamber that moves upwardly therethrough whereby dust particles are transferred from said gas flow to said liquid flow, said method comprising the steps of: increasing the velocity of said gas flow as it enters said chamber, temporarily confining said gas flow to a substantially horizontal pathway upon entrance to said chamber, and increasing liquid flow accumulation in the area of said horizontal pathway and across said gas inlet.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |