Abstract: An arrangement for the levitated guidance of a material web includes a plurality of nozzle boxes to which blowing air can be supplied. The nozzle boxes are arranged above and below the material web and are arranged one behind the other in travel direction of the material web. Each nozzle box has a nozzle plate in the form of a V-shaped trough. Two rows of openings with round blow nozzles are arranged adjacent the longitudinal edges of the nozzle plate. The axes of the round blow nozzles extend perpendicularly to the plane surface portions of the nozzle plate. The round blow nozzles are arranged in the rows of openings in such a way that the round blow nozzles of one row of openings immediately adjacent one of the longitudinal edges are arranged in a vertical transverse plane which extends between two vertical transverse planes extending through the round blow nozzles of the two rows of nozzles arranged adjacent the opposite longitudinal edge of the nozzle box.

Abstract: An arrangement for reducing the moisture content of sludge includes a spray dryer to which the sludge, a dispersion medium in the form of gas or vapor as well as hot gas can be supplied. The arrangement further includes a separating unit with solids discharge arranged following the spray dryer via a transfer line and a heater for raising the temperature level of the gas entering the separating unit, wherein the heater is arranged in a connecting line between the separating unit and the spray dryer.

Abstract: A heat exchanger particularly for cooling of hot smoke gases with aggresive components by clean gas to be heated, has side walls having two spaced ends, bottom walls arranged at the ends of the side walls, a plurality of glass pipes extending substantially parallel to each other and to the side walls and arranged so that a smoke gas passes through the glass pipes, while a clean gas passes transversely to the latter, and flow passages extending along the side walls in direction of glass pipes and arranged for guiding the smoke gas.