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US3907526A Expired / Lapsed US ⏱️ 0.0 years remaining

High velocity spray scrubber

Assignee: Peabody Engineering Corp
•
Filing: 1973-04-30
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Granted: 1975-09-23
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Expires: 1993-04-30
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Abstract

Abstract Flue gas containing sulphur dioxide is moved upwardly through an unobstructed scrubber space while a scrubber liquor is sprayed downwardly into the space from a plurality of at least four vertically spaced spray heads. The relative velocity between the scrubber liquor and the gas is at least about 600 feet per minute. Means are provided above the uppermost spray head for removing entrained liquor droplets and dust particles from the rapidly upwardly moving scrubber flue gas. This means may include a wash tray having clear water passing over the top thereof and a spray head for spraying water at the bottom thereof to prevent the formation of deposits thereon. In lieu of the wash tray the scrubber may be widened above the scrubber space to slow the velocity of the flue gas whereby to cause entrained liquor droplets and dust particles to fall out of the gas. In this latter embodiment water sprays may be directed at the widened portion of the scrubber tower to prevent the formation of deposits. Disposed between the liquor droplet and dust particle removal means and the outlet for the scrubber is a mist eliminator.

Inventors

  • 👤 Abdus Saleem
  • 👤 Robert Kopita

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 15:48
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 202 words
IN A SCRUBBER COMPRISING: A PERIPHERALLY CONTINUOUS UPWARDLY EXTENDING WALL DEFINING A SUBSTANTIALLY UNOBSTRUCTED SCRUBBING SPACE THEREWITHIN, SAID WALL HAVING AN INLET BELOW SAID SCRUBBING SPACE AND AN OUTLET THEREABOVE, A PLURALITY OF VERTICALLY SPACED DOWNWARDLY DIRECTED NOZZLES IN SAID SCRUBBER SPACE, SAID NOZZLES BEING CONSTRUCTED TO SPRAY INTO SAID SCRUBBER SPACE DROPLTS OF SCRUBBER LIQUOR HAVING A MINIMUM DIAMETER OF ABOUT 500 MICRONS, MEANS FOR INTRODUCING GAS TO BE SCRUBBED THROUGH SAID INLET AND MEANS FOR FEEDING SCRUBBING LIQUOR TO SAID NOZZELS, THE RELATIVE VELOCITY BETWEEN THE UPWARDLY MOVING GAS IN SAID SCRUBBING SPACE AND SAID DOWNWARDLY MOVING DROPLETS OF SCRUBBER LIQUOR BEING NOT LESS THAN ABOUT 600 FEET PER MINUTE, THE IMPROVEMENT WHICH COMPRISES A WASH TRAY DISPOSED BETWEEN THE UPPER END OF SAID SCRUBBING SPACE AND SAID OUTLET, MEANS FOR FLOWING A LAYER OF WATER OVER THE UPPER SURFACE OF SAID WASH TRAY FOR REMOVING ENTRAINED DROPLETS AND PARTICULATES FROM SAID GAS, AN UPWARDLY DIRECTED SPRAY HEAD DISPOSED BENEATH SAID WASH TRAY, AND MEANS FOR SUPPLYING WATER TO SAID UPWARDLY DIRECTED SPRAY HEAD FOR SPRAYING SAID WATER ONTO THE UNDERSIDE OF SAID WASH TRAY, WHEREBY TO PREVENT THE FORMULATION OF MINERAL DEPOSITS ON THE BOTTOM OF SAID WASH TRAY.
Claim 2
Dependent Claim 202 words
IN A SCRUBBER COMPRISING: A PERIPHERALLY CONTINUOUS UPWARDLY EXTENDING WALL DEFINING A SUBSTANTIALLY UNOBSTRUCTED SCRUBBING SPACE THEREWITHIN, SAID WALL HAVING AN INLET BELOW SAID SCRUBBING SPACE AND AN OUTLET THEREABOVE, A PLURALITY OF VERTICALLY SPACED DOWNWARDLY DIRECTED NOZZLES IN SAID SCRUBBER SPACE, SAID NOZZLES BEING CONSTRUCTED TO SPRAY INTO SAID SCRUBBER SPACE DROPLTS OF SCRUBBER LIQUOR HAVING A MINIMUM DIAMETER OF ABOUT 500 MICRONS, MEANS FOR INTRODUCING GAS TO BE SCRUBBED THROUGH SAID INLET AND MEANS FOR FEEDING SCRUBBING LIQUOR TO SAID NOZZELS, THE RELATIVE VELOCITY BETWEEN THE UPWARDLY MOVING GAS IN SAID SCRUBBING SPACE AND SAID DOWNWARDLY MOVING DROPLETS OF SCRUBBER LIQUOR BEING NOT LESS THAN ABOUT 600 FEET PER MINUTE, THE IMPROVEMENT WHICH COMPRISES A WASH TRAY DISPOSED BETWEEN THE UPPER END OF SAID SCRUBBING SPACE AND SAID OUTLET, MEANS FOR FLOWING A LAYER OF WATER OVER THE UPPER SURFACE OF SAID WASH TRAY FOR REMOVING ENTRAINED DROPLETS AND PARTICULATES FROM SAID GAS, AN UPWARDLY DIRECTED SPRAY HEAD DISPOSED BENEATH SAID WASH TRAY, AND MEANS FOR SUPPLYING WATER TO SAID UPWARDLY DIRECTED SPRAY HEAD FOR SPRAYING SAID WATER ONTO THE UNDERSIDE OF SAID WASH TRAY, WHEREBY TO PREVENT THE FORMULATION OF MINERAL DEPOSITS ON THE BOTTOM OF SAID WASH TRAY.
Claim 3
Dependent Claim 22 words
The scrubber of claim 1, wherein said nozzles are constructed so that the median droplet diameter is at least about 2,000 microns.
Claim 4
Dependent Claim 20 words
The scrubber of claim 1, wherein said nozzles are constructed so that the median droplet diameter is about 3,000 microns.
Claim 5
Dependent Claim 21 words
The scrubber of claim 1, further comprising a mist eliminator disposed between said means for receiving entrained solids and said outlet.
Claim 6
Dependent Claim 22 words
The scrubber of claim 4, wherein said nozzles are constructed so that the median droplet diameter is at least about 2,000 microns.
Claim 7
Dependent Claim 40 words
The scrubber of claim 1, wherein said means for supplying water to said upwardly directed spray head comprises a tank, and means for supplying water to said tank after it has flowed over the upper surface of said wash tray.

References Cited (Backward Citations)

US2247897A Cited
US3370402A Cited
US3395193A Cited
US3456709A Cited
US3631656A Cited
US3687613A Cited
US3795486A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-22 1979-03-24 1979-09-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-22 1983-03-24 1983-09-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-22 1987-03-24 1987-09-23 $7700.00 Window Closed / Lapsed

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