Method of purifying gases using rotatable plates having a solid reaction surface layer thereon

• US 3,907,967 A
• Filed: 07/19/1973
• Issued: 09/23/1975
• Est. Priority Date: 07/25/1972
• Status: Expired due to Term

• Current Assignee: Peter Filss
• Original Assignee: Peter Filss
• Inventors: Filss, Peter
• Primary Examiner(s): Mack, John H.
• Assistant Examiner(s): Solomon, W. I.
• Application Number:
  US05/380,619
• Time in Patent Office: 796 Days
• Field of Search: 423/210,230,239,244,247 55/68,74,387
• US Class Current: 423/210
• CPC Class Codes: B01D 47/16 Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid

Abstract

A method of and apparatus for purifying gases, especially industrial waste gases, according to which a solid surface layer adapted to adsorb impurifications is formed on rotatable discs of which successive portions during the rotation of the discs temporarily protrude from a liquid containing container. This layer, when being contacted by the gas to be purified, adsorbs the impurifications and harmful substances of the gas. the exhausted portion of the surface layer is replaced successively by a new surface layer portion formed by wetting the disc portions when the latter pass through the liquid in the container.

Claims

1. A METHOD OF PURIFYING GASES, ESPECIALLY INDUSTRIAL WASTE GASES, BY MEANS OF ROTABLE PLATES AXIALLY SPACED FROM EACH OTHER BY A FEW MILLIMETERS AND PATIALLY IMMERSED INTO A LIQUID FOR FORMING ABSORPTION LAYER ON THE PLATES WETTED BY SAID LIQUID FOR ABSORBING IMPURITIES FROM THE GASES TO BE PURIFIED, WHICH INCLUDES IN COMBINATION THE STEPS OF:

EMPLOYING AS LIQUID AN AQUEOUS SOLUTION ADPTED ON THOSE PORTIONS OF THE ROTATABLE PLATES WHICH DURING THE ROTATION THEREOF ARE ABOVE THE LEVEL OF THE LIQUID TO FORM A SOLID SURFACE LAYER CAPABLE TO ABSORB IMPURITIES AND HARMFUL SUBSTANCES FROM THE GAS TO BE PURIFIED BETWEEN THE RESPECTIVE PLATE PORTIONS WHCH DURING ROTATION OF THE LATTER ARE ABOVE THE LEVEL OF THE LIQUID, ROTATI NG THE PLATES, FORMING THE SOLID SURFACE LAYER, FEEDING IMPURE GAS BETWEEN THE PLATES, AND REMOVING IMPURITIES AND HARMFUL SUBSTANCES ABSORBED BY SAID SOLID SURFACE LAYER FROM SAID PLATES AND REPLACING EXHAUSTED PORTIONS OF SAID LAYER BY A FRESH

2. A method in combination according to claim 1, in which as liquid an aqueous solution is employed which contains a substance adapted when reacting with said surface layer to bring about a generation of a gel with a frame structure.

3. A method in combination according to claim 1, which includes the step of changing the temperature of at least a portion of said plates for the purpose of forming the solid layer on the plate portion above the liquid.

4. A method of purifying gases, especially industrial waste gases by means of rotatable driven plates axially spaced from each other by a few millimeters and partially immersed into a liquid for forming a layer on the plates wetted by said liquid for adsorbing and chemically reacting impurities from the gas to be purified, which includes the steps of:

employing as liquid an aqueous solution adapted on those portions of the rotatable driven plates which during the rotation thereof are above the level of the liquid to form by evaporation of the liquid a solid surface layer capable to adsorb and to chemically react impurities and harmful substances from the gas to be purified, forming a solid surface layer above the level of the liquid, passing the gas to be purified between the respective plate portions which during rotation of the latter are above the level of the liquid, and removing impurities and harmful substances chemically fixed by said solid surface layer from said rotatable driven plates and replacing exhausted portions of said layer by a fresh forming solid layer by immersing the plate portions into said liquid.

5. A method according to claim 4, which includes the step of changing the temperature of said plates to increase the speed of forming said solid surface layer and the reaction of said solid surface layer with said impurities.

6. A method according to claim 4, in which as liquid an aqueous solution is employed which contains a substance adapted when subjected to evaporation to bring about the generation of a gel with a structure rich in pores.

7. A method according to claim 4, in which as liquid an aqueous solution is employed which contains a substance adapted for the generation of a frame structure duRing reaction of said impurities of the gases with said solid surface layer.