US3765659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas scrubber
Assignee: Individual
•
Filing: 1972-01-17
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Granted: 1973-10-16
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Expires: 1992-01-17
Abstract
Abstract A gas cleaning apparatus for removing particulate matter from gases which is of the type having a vertical passage through which the gases flow upwardly with water-containing trays across the passage at spaced levels, has each tray formed with a perforate bottom and an impingement plate spaced a short distance above the bottom, the tray bottom and impingement plate each having holes therethrough through which the gases pass. The holes in the impingement plate are slightly larger than those in the bottom and so staggered that the holes of the bottom are under solid areas of the impingement plate. There are spray nozzles under the trays at each level for cleaning them. The holes through the bottom and the impingement plates of each tray are of progressively smaller area than the corresponding holes in the trays beneath, but the number of holes in the corresponding parts of each tray increases upwardly above the bottom one so that the total area of the openings through the elements of the trays at each level is substantially the same.
Inventors
- 👤 B Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:02
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
234 words
Apparatus for removing particulate solids from a stream of gas comprising: a. a casing through which the gas to be cleaned flows upwardly, b. a plurality of water-receiving and retaining trays positioned across that casing at a plurality of vertically-spaced intervals through which the gas to be cleaned passes, c. each tray having a bottom with regularly-spaced holes therethrough and perforate means supported above the bottom providing spaced openings for the passage of gas therethrough separated by imperforate target areas over the holes in the bottom of the tray, d. the individual holes through the bottom of each tray being smaller in area than the holes in the bottom of the tray beneath but with the number of holes in the bottoms of the trays at each level being progressively greater and so arranged that the pressure drop across a tray at any level is substantially the same as that across a tray at any other level, e. said means providing the target areas of the respective trays being arranged to increase the number of target areas and decrease the spacing between said areas as the size of the holes in the tray where it is positioned decreases with respect to the tray below and its number of such holes increases, and f. means for spraying the undersurface of the bottom on each tray with water to keep it free of accumulated particulate material.
Claim 2
Dependent Claim
234 words
Apparatus for removing particulate solids from a stream of gas comprising: a. a casing through which the gas to be cleaned flows upwardly, b. a plurality of water-receiving and retaining trays positioned across that casing at a plurality of vertically-spaced intervals through which the gas to be cleaned passes, c. each tray having a bottom with regularly-spaced holes therethrough and perforate means supported above the bottom providing spaced openings for the passage of gas therethrough separated by imperforate target areas over the holes in the bottom of the tray, d. the individual holes through the bottom of each tray being smaller in area than the holes in the bottom of the tray beneath but with the number of holes in the bottoms of the trays at each level being progressively greater and so arranged that the pressure drop across a tray at any level is substantially the same as that across a tray at any other level, e. said means providing the target areas of the respective trays being arranged to increase the number of target areas and decrease the spacing between said areas as the size of the holes in the tray where it is positioned decreases with respect to the tray below and its number of such holes increases, and f. means for spraying the undersurface of the bottom on each tray with water to keep it free of accumulated particulate material.
Claim 3
Dependent Claim
167 words
Apparatus for removing particulate solids from a stream of gas as defined in claim 1 wherein saiD means for providing spaced target areas comprises an impingement plate fixed above the tray bottom but below the level of the top of the tray with holes therethrough, the holes in each impingement plate being larger than the holes in the bottom of the tray in which the plate is positioned and with their centers spaced from each other the same distance as the centers of the holes in the tray bottom but with said centers offset with respect to the centers of the holes in the bottom of said tray in such manner that a solid area of said plate is directly above each hole in said tray bottom, the areas of the individual holes in the impingement plates also decreasing in area upwardly from the lowermost tray while the number of holes increases relative to the number of holes in the impingement plate of the next lower tray.
Claim 4
Dependent Claim
165 words
Apparatus as defined in claim 2 wherein there are three trays in vertically-spaced relation, the holes in the bottom of the lowermost tray being typically three-sixteenths of an inch in diameter and the distance between adjacent hole centers being seven-sixteenths of an inch, and in the bottom of the middle tray being one-eighth of an inch in diameter with the spacing between adjacent holes being five-sixteenths of an inch between centers and the bottom of the top tray being three thirty-seconds of an inch with the distance between adjacent hole centers being seven thirty-seconds of an inch; the spacing between the holes of the impingement plate of each tray being the same as the center-to-center spacing of holes in the bottom of the tray in which it is positioned, with the diameters of the holes in the respective impingement plates of the trays from bottom to top being typically nine thirty-seconds of an inch, three-sixteenths of an inch and nine sixty-fourths of an inch respectively.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |