Abstract: This pollution eliminator is comprised of three concentric vertical stacks or chimneys, wherein the outer stack is higher than the inner stack. Exhaust flue gases primarily from a furnace is directed up through the central stack, wherein the hot flue gases rise, as in a conventional chimney. The flue gases, on exiting the central stack, expand laterally wherein the fly ash is captured by the intermediate stack and drops down the annular space formed therebetween. The flue gases, on exiting this intermediate stack, further expand within the outer stack. Means are provided in the annular space between the outer and intermediate stack to cause water vapor to rise therein. The vapor reacts with some of the oxides of the gases from the flue to form acid molecules which are condensed on the upper inner wall of the outer stack. Means are provided, also in the outer stack, to cause the flue gases to spin, to enhance the capture of acid molecules on the wall thereof.

Abstract: A gas scrubber is provided for the removal of particulates and chemical contaminants from air and other gases. The particulates and chemical contaminants are removed from gas drawn through the scrubber, by inertial separation, spraying with water or liquid chemicals, and filtering techniques. A throat section of adjustable cross-sectional area is utilized in the scrubber to provide optimum air velocity and turbulence for maximum scrubbing efficiency over a wide range of air handling capacities. The cross-sectional area of the throat is adjusted by controlling the level of the liquid in a liquid-filled sump which is provided for the spray water or liquor. Removable filter baskets of variable depth are utilized during final treatment of the air or gas being cleaned.

Abstract: Baffle tray columns can be designed and operated so to function as highly efficient scrubbers for the cleaning of flue gases subject to wide variations in flow. The columns are designed and operated such that areas within the scrubbing area operate with a liquid phase continuous froth as the contacting medium. The columns can also contain an integral non-clogging separator for entrainment control.

Abstract: A horizontal tubular housing is supported at one of its ends across the top of a stack and a blower is mounted at one end of the housing for moving gases discharged from the stack through the housing. The housing has a plurality of laterally disposed baffle plates arranged such that when impinged by the moving stack gases, the latter will be directed in a tortuous path, preferably an initial spiral path and a subsequent zig zag path. Some of the baffle plates are adjustable to vary the turbulence of the gases in their tortuous movement. Spray nozzles are mounted in the housing at most of the baffle plates to provide curtains of liquid spray for washing the gases. The housing has a liquid drainage outlet in its bottom wall intermediate its ends, and such bottom wall is inclined downwardly from opposite ends of the housing to the outlet to provide drainage. Adjustable louvers are provided in the outlet of the blower to vary the direction of air movement from the blower across the stack.

Abstract: A gas treatment apparatus suitable for removing sulfur oxides and dust from gas streams is disclosed. The gas to be treated is conveyed through a conduit and past at least one nozzle positioned in fluid communicaton with the interior of the conduit. The nozzle injects an atomized solution, such as an alkali metal carbonate solution, into the gas. Solids formed by contacting the gas with the solution collect on the inner surface of a conical funnel-shaped portion of a hollow body. The hollow body includes a conduit portion in coaxial alignment with the hollow body. The solids are first removed from the hollow body by a screw conveyer positioned on the conical funnel-shaped portion and then withdrawn through a solids exit port. Gases formed by the contact of the gas with the injected solution are removed through a gas exit port in the hollow body and a gas passageway defined by the inner surface of the hollow body and the outer surface of the conduit portion.

Abstract: Combination unit capable of use as a heat exchanger as well as for scrubbing particle-laden flue gases from a boiler, for instance. It comprises a casing inwardly divided into a lower chamber and an upper chamber, both chambers communicating by lateral baffled passages in which baffle members are disposed and water sprinklers are provided in such a manner as to create, in such lateral passages, a series of curtains of water through which the flue gases must pass in their way from the flue gas inlet, in the lower chamber, to the flue gas outlet, in the upper chamber. Simultaneously, banks of air conduits are provided in both chambers to recuperate heat from the hot flue gases. Water dripping from the aforesaid curtains is collected in the bottom of the casing and recirculated by the sprinklers after, occasionaly, having been filtered.

Abstract: Apparatus in which a gas such as air, containing nitrogen oxides, is mixed with high temperature steam of 130.degree. to 150.degree.C in a reactor vessel to convert the nitrogen oxides to soluble substances and then dissolve said soluble substances in a liquid absorbent such as warm water or a weak alkaline warm aqueous solution, said liquid absorbent being collected thereafter, so that the nitrogen oxides are separately removed from the gas. The apparatus of the invention has an attainable efficiency of separately removing nitrogen oxides exceeding 95 percent, for gas having the nitrogen oxides content of 100 ppm to 10,000 ppm.