Abstract: A water-spray separator for purifying particle-polluted discharged air (9) from a working area, especially for purifying discharged air containing paint particles from a spray-painting booth, with a flow duct adjacent to the working area and with a cross-sectional extent set by two spaced duct walls (1, 2) into which the polluted discharged air (9) flows and into which a fluid (8) is introduced to run along the channel walls (1, 2). The duct comprises an inlet (1a, 2a), an adjacent expansion section (1c, 2c), an adjacent deflection section (4) which deflects the flow of discharged air transversely to the direction of flow in the inlet (1a, 2a), an adjacent nozzle (5), an adjacent duct outlet (6) in which there is an abrupt narrowing (7) in the duct cross-section, and a reflector section (3) formed on the duct wall opposite the nozzle (5) against the direction of flow through the nozzle (5) and reflecting the noise generated in the region of the nozzle (5) substantially back towards the nozzle (5).

Abstract: A wet separator for purifying polluted conditioning air and separating solid and semi-liquid particles therefrom, especially paint particles in the outlet of a spray painting booth. For this purpose, there is a series of outlets with surfaces converging in the direction of flow into a neck or throat which increases the speed of passing media and thus achieves mixing of air, water and pollutants. According to the invention, beyond the first outlet in the direction of flow there is a dispersing chamber for further mixing and atomizing the mixture, which chamber terminates in the direction of flow in the second outlet, which is designed as a venturi with a more extensively throttled venturi opening defined by a flange extending into said opening. The outlets may be interconnected by a guiding surface, on which a dispersing stream of water droplets, air and pollutions impinge with a flat angle of impact adjacent to the second outlet at the lower end of the guiding surface.

Abstract: A method for refining organic material such as bark, wood shavings, wood chips, other wood waste and peat for use as a solid fuel or for gas generation in which the material after dewatering is disintegrated and dried by the flue gases passing from the heat exchange surfaces of the furnace in which the material is burned.

Abstract: To improve the energy balance of the method, air heated to a temperature at which the mixture can be dried is brought in contact with the mixture in form of an air-stream, which also conveys the mixture through the plant during the process. This moist air giving off most of its heat during drying is vented, and the dried mixture is subsequently conveyed for exposure to a stream of hot air to effect separation of plastic and paper from each other, the resulting particles then being separated in an air classifier, or cyclone, and the heated dry air being recirculated to the entry point of the plant for reuse in the process to dry additional moist material being introduced therein.