Abstract: In summary a device for removing airborne particulate of the present invention includes at least one chamber having an airstream inlet at an upstream end and an airstream outlet at a downstream end, an air mover cooperating with the at least one chamber so as to urge an airborne particulate laden airstream into the at least one chamber through the inlet, along a flow path through the at least one chamber, and out of the at least one chamber through the outlet, at least one water sprayer mounted to the at least one chamber for mixing a spray of water with the airstream in the flow path, at least one slurry collecting element mounted entirely across and in the flow path so as to seal across the chamber to prevent bypass of the airstream around the collecting element, the collecting element downstream of the water sprayer, the at least one slurry collecting clement including at least one array of slurry collecting members mounted so as to pass at least a portion of the airstream through the array, the at least o

Abstract: An exhaust ventilation apparatus to be temporarily mounted in a continuous pulp digester or similar elongated vessel to provide local air ventilation from one or more selected worksites in the vessel. An exhaust duct extending upwardly to an outlet opening has numerous inlet ports spaced along it. Venturi type air movers each having an air collection conduit attached to it are connected to several of the inlet ports of the exhaust duct. Each air collection conduit is mounted with an inlet located near one of the selected worksites to draw polluted air out of the vessel through the exhaust duct. The air movers and/or the air collection conduits are easily movable as work progresses.