Abstract: The invention relates to a system and a method for purifying ship diesel exhaust gases of fine dust particles, and of certain burnt gases, having a spray tower, a venturi washer, a cyclone and a disc centerifuge.

Abstract: The invention relates to a system and a method for purifying ship diesel exhaust gases of fine dust particles, and of certain burnt gases, having a spray tower, a venturi washer, a cyclone and a disc centerifuge.

Abstract: The invention relates to a differential pressure cleaning system consisting of a flow pipe (7) with a throttle (1) and at least one cleaning fluid feed device (14) fitted over the throttle (1) for treating exhaust gases from technical processes which give off mixtures of gases, vapors and dusts. The throttle (1) located in the flow pipe (7) takes the form of an approximately rectangular slot (2) at its narrowest point. A displacement body (3) is arranged downstream of the slot (2), extending over the entire length of the slot and mounted in such a way as to be movable towards and away from the slot (2). This provides two roughly parallel venturi grooves (6) between the walls of the throttle (1) and the outer wall of the displacement body. The cross-sections of these two venturi grooves (6) can be adjusted as desired by moving the displacement body (3). The throttle (1) in the flow pipe (7) is preferably realised by two commercially available transverse pipes (8) displaying a circular cross-section.

Abstract: A radial fan with an axial housing, in particular for conveying chemically aggressive air and gases, the approximately circular cylindrical plastic housing of which has a rotationally symmetrical inlet funnel at one of its ends and an outlet funnel at its other end, and close behind the inlet funnel encloses a plastic impeller arranged coaxially with the latter, which possesses at its circumference apertures for the approximately radial discharge of the air or gases, conveyed by its curved guide blades, into the surrounding housing, the electromotor driving the impeller being situated inside a separately ventilated, plastic inner housing which penetrates the housing of the radial fan and is sealed with respect to the latter, has an electromotor carried by a support plate, which in turn is carried by four support columns, fastened to a baseplate, wherein the housing, together with the inner housing connected rigidly thereto, is connected detachably to this baseplate.

Abstract: A laboratory gas scrubber for removing soluble contaminant gases from the exit air from laboratory extractor hoods comprises a cabinet which is assigned to a laboratory extractor hood and is placed close beside the latter to form a closed subassembly and which contains in its lower part a scrubbing liquid tank, an immersion pump immersed in the latter, and a switchbox with the electrical control devices for operating the laboratory gas scrubber, while its upper part contains an inner housing with inlet connectors for the exit air which is emerging from the laboratory extractor hood and is to be purified, and an outlet connector for the purified exit air, and this inner housing contains a packing zone, above this a spraying zone and above this an agglomeration zone. It is possible for two or three laboratory extractor hoods to be arranged beside the laboratory gas scrubber and to be connected to the latter.

Abstract: A centrifugal fan, comprising a housing with axially directed inlet and radially directed outlet as well as a driven impeller with rearwardly curved fan blades, the impeller being pivoted in the housing, includes a housing with an octogonal outer and inner cross section and further includes a sheet-metal deflector in the neighbourhood of the radial outlet, the deflector extending from one front wall to the other one and leading from the back edge of the outlet with respect to the rotational direction of the impeller radially inwards to the neighbourhood of the circumference of the impeller and from there outwards to the housing wall in a spiral-like curve. In a particular embodiment the impeller is displaced by a certain amount with respect to the center of the housing.

Abstract: In gas washer and similar separator devices which utilize stationary wall means to deflect a gas flow and to subject the same to centrifugal force for continuously separating out foreign particulate matter which is collected on or adjacent the stationary wall means, the invention provides spirally curved laminae constituting the stationary wall means and co-operating to define passage means, at least a part of which has a cross-section which first narrows and then widens in the direction of fluid flow and which is also curved spirally first in one and then in the opposite direction. Nozzle means may be arranged to feed moisture into the fluid flow to assist wet separation, and by electrically insulating conductive laminae from one another, the invention may also be used as an electrostatic precipitator.