Abstract: A scaffolding assembly includes a plurality of sound attenuating sheets, detachably mounted on a frame erectable substantially adjacent to a structure. The frame includes sheet supporting members. The sheet supporting members and the plurality of sound attenuating sheets when mounted on the sheet supporting members define an enclosed working area adjacent the structure, so as to affect a seal to substantially contain air pollution and other detritus, and noise pollution within the enclosed scaffolding assembly when erected adjacent to the structure. An inclined catchment ramp is mounted along the length of at least one of the scaffold working decks so as to sandwich each ramp between the working deck and the adjacent wall of the structure.

Abstract: A vacuum conduit system for removal of fumes and air borne particulate matter includes a primary duct and a plurality of flexible secondary ducts mounted in fluid cooperation to the primary duct. The primary duct includes hollow rigid conduit sections interspersed between, and in fluid communication with, hollow flexible conduit sections. An upstream end of the primary duct is sealed substantially air-tight. An opposite downstream end of the primary duct cooperates with an air extraction means for extracting air from the primary duct. Secondary ducts may be mounted at their downstream ends to the rigid conduit sections and inclined at a first angle relative to the rigid conduit sections so that secondary airflows leaving the downstream ends of the secondary ducts are inclined into an airflow stream in the primary duct so as to be directed in a downstream direction of the airflow stream in the primary duct to generally equalize vacuum levels at the downstream ends of the secondary ducts.

Abstract: A vacuum conduit system for removal of fumes and air borne particulate matter includes a primary duct and a plurality of flexible secondary ducts mounted in fluid cooperation to the primary duct. The primary duct includes hollow rigid conduit sections interspersed between, and in fluid communication with, hollow flexible conduit sections. An upstream end of the primary duct is sealed substantially air-tight. An opposite downstream end of the primary duct cooperates with an air extraction means for extracting air from the primary duct. Secondary ducts may be mounted at their downstream ends to the rigid conduit sections and inclined at a first angle relative to the rigid conduit sections so that secondary airflows leaving the downstream ends of the secondary ducts are inclined into an airflow stream in the primary duct so as to be directed in a downstream direction of the airflow stream in the primary duct to generally equalize vacuum levels at the downstream ends of the secondary ducts.

Abstract: A device for removing airborne particulate 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 element 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 one chamber having a slurry remover t

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.