Abstract: A method for controlling gas flow direction through a regenerative incinerator system coupled to a flow reversing valve, and for reversing the flow direction of the gas stream through the regenerative incinerator system. The regenerative incinerator system having a combustion zone and one or more heat accumulating and heat exchanging zones. The method establishes a combustion zone base temperature set-point, or T.sub.CB for referencing combustion zone temperatures, or T.sub.C 's, and an outlet base temperature set-point, or T.sub.OB, for referencing outlet temperatures, or T.sub.O 's, from the regenerative incinerator system. A switching temperature, or T.sub.S, is also established as a function of T.sub.C, T.sub.CB and T.sub.OB such that the slope of said function, i.e. dT.sub.S /dT.sub.C, is never negative over a predetermined range of combustion zone temperatures, or T.sub.C 's. The switching temperature being equal to T.sub.OB when the combustion zone temperature is equal to T.sub.CB.

Abstract: An apparatus for neutralizing basic fumes and acidic fumes and absorbing such fumes and the salts thereof in a liquid solvent comprising a vertically extending, columnar housing; a cylindrical gas flow passage at the bottom of the housing in inwardly spaced relationship therefrom; a tangential gas inlet connected to the inlet of the cylindrical gas flow passage extending through the housing and sealed from direct communication therewith; a conical, upwardly converging gas flow passage the inlet of which is connected in gas tight sealing relationship to the top and outlet of the cylindrical gas flow passage; downwardly directed liquid solvent spraying apparatus disposed in the housing above the outlet of the conical passage and directed downwardly along the projection of the axis of the conical passage; first coalescing apparatus disposed in the housing at a first elevation above the spraying apparatus and extending radially across the housing and abutting the entire circumference thereof at the first elevatio