Abstract: The thermal energy required for spray drying a solution of a solid product in a volatile, liquid solvent is effectively utilized by partly converting the solvent to a gaseous phase in a multiple-effect evaporator and by spray drying the resulting concentrate by means of a gaseous fluid at least partly preheated by heat exchange with solvent vapor or condensate from at least two effects in respective stages of a multiple-stage heating arrangement.

Abstract: A device for separating impurities from gases by means of a washing liquid. The device includes three (3) interconnected chambers: a suction chamber, a mixing chamber and a separating chamber, wherein the outer wall of the mixing chamber is the inner wall of the suction chamber and the inner wall of the mixing chamber is the outer wall of the separating chamber. In the upper portion of the mixing chamber there is an inlet which connects the suction and mixing chambers for conveying contaminated gases rising in the suction chamber downwardly into the mixing chamber. In the upper portion of the mixing chamber below the outlet there is mounted a plurality of spray nozzles for downwardly spraying washing liquids which removes impurities in the contaminated gases as they flow downwardly through the mixing chamber. At the bottom of and directly open to the mixing and separating chambers is a liquid collection chamber for collecting used washing liquids and impurities from the gases.

Abstract: An improvement in steam jet cooling apparatus for cooling liquids, the apparatus being of the type in which a steam jet compressor, expansion chamber and condensation chamber are arranged in a common horizontally extending vessel that is divided by a partition into the expansion and condensation chambers with the steam jet compressor extending through such partition into both chambers. The improvement provides a manifold inside the vessel for the inlet of the liquid to be cooled which manifold is above the steam jet compressor and extends generally parallel to the length axis of the vessel, plus a divider plate positioned between the manifold in the steam jet compressor through shield, the steam jet compressor against the liquid flowing out of the manifold.