A dust collection device and method for filtering powder from powder-filled air in a food product processing system. The dust collection device includes a venturi mixer having an inlet for receiving powder-filled air, a liquid inlet for receiving liquid, and a nozzle. The nozzle is arranged to eject the liquid into a mixing zone of the venturi mixer. The powder-filled air and the liquid meet in the mixing zone to form a liquid mixture. The dust collection device includes a chamber that receives the liquid mixture from the mixing zone, a recirculation line that feeds the liquid mixture back to the liquid inlet of the venturi mixer, and an air outlet that discharges air from the chamber.

A liquid filter apparatus for gas/solid separation includes a housing with a filter chamber, a semiconductor process gas inlet, and a process gas outlet. The filter chamber forms a liquid reservoir, and the semiconductor process gas inlet and the process gas outlet are in communication with the filter chamber. The housing further includes a filter liquid inlet and a filter liquid outlet, which are in communication with the liquid reservoir for delivering and removing filter fluid, respectively, to and from the liquid reservoir.

An exhaust unit includes a dirty air intake opening, a clean air output opening and an airflow path defined between the dirty air intake opening and the clean air output opening. The exhaust unit further includes an upstream quenching section and a downstream filtering section along the airflow path. The quenching section has a wetting chamber that includes a reservoir having a fill level for a quenching liquid, and a downtube connected over the dirty air intake opening and opening at its end above, and in opposition to, the plane of the fill level.

A device for producing and treating a gas stream is provided that includes an enclosure, of which the lower part is submerged in a liquid supply open at the top and includes at least one liquid intake opening. The submerged lower part of the enclosure contains a volume of this liquid and at least one opening for discharging a gas stream, positioned above the surface of the volume of liquid contained in the enclosure. The device further provides for injecting a gas stream including at least one injection conduit and extends in the upper part inside the enclosure outside the volume of liquid. During operation of the device an incoming gas stream is introduced to create an outgoing gas stream, treated by direct contact with said volume of liquid that is discharged outside the enclosure. A facility inclusive of the device and method of operation are also provided.

A device for producing and treating a gas stream is provided that includes an enclosure, of which the lower part is submerged in a liquid supply open at the top and includes at least one liquid intake opening. The submerged lower part of the enclosure contains a volume of this liquid and at least one opening for discharging a gas stream, positioned above the surface of the volume of liquid contained in the enclosure. The device further provides for injecting a gas stream including at least one injection conduit and extends in the upper part inside the enclosure outside the volume of liquid. During operation of the device an incoming gas stream is introduced to create an outgoing gas stream, treated by direct contact with said volume of liquid that is discharged outside the enclosure. A facility inclusive of the device and method of operation are also provided.

A waste gas purification system includes a gas container, a gas input unit for intermittent entrance of waste gas into the gas container, a gas output unit for discharge of the waste gas out of the gas container after the waste gas is purified, and a contaminant capturing apparatus disposed in the gas container and including a capture device that purifies the waste gas by using an adhesive to adhere particulate matter in the waste gas. A length of an active time the gas input unit allows for entrance of the waste gas into the gas container does not exceed sixty seconds. A length of a pause time the gas input unit does not allow for entrance of the waste gas into the gas container does not exceed thirty minutes.

A process is described, as well as a plant, for treating a raw vent gas (4,4′) containing bitumen vapours and released by a piece of equipment (1) of a polymer-bitumen membranes production line, in which operations are carried out involving a filler powder (3), such as an operation of mixing the filler powder (3) with the bitumen (2), during which the raw vent gas (4,4′) is changed from a substantially powder-free raw vent gas (4), into a raw vent gas (4′) containing the filler powder (3). The process includes steps of first conveying the raw vent gas (4,4) into a gas-washing device (20) along with a solution (9) of a surfactant; contacting the raw vent gas (4,4) with the solution (9) and removing the powder from the powder-containing gas (4′), releasing a purified vent gas (5) that is substantially free from the filler powder; conveying the purified vent gas (5) into a boiler (40) and burning the bitumen vapours. In a preferred exemplary embodiment, it is conveyed in the gas-washing device only the powder-containing gas (4′) produced during the operations of the piece of equipment (1) that involve the filler powder (3), while in the remainder steps the substantially powder-free raw vent gas (4) is directly conveyed into the boiler (40) by a direct vent line (50) that can be automatically selected. In a preferred exemplary embodiment, the gas-washing device comprises a tank (25) configured to form inside a predetermined head of the washing solution (9) and having an inlet port for the raw vent gas arranged below the liquid head. The process prevents the powder from quickly reaching the boiler (40) making the burner and the heat-exchange surfaces ineffective.

A waste gas purification system includes a gas container, a gas input unit, a gas output unit, and a contaminant capturing apparatus disposed in the gas container. The contaminant capturing apparatus includes a driver device, and a capturing device to be driven by the driver device. The driver device includes two rollers, and the capturing device includes a tape disposed to continuously move from one roller to another roller when the rollers are rotating. The tape has a surface coated with an adhesive to purify waste gas entering from the gas input unit by capturing particulate matter in the waste gas before being discharged via the gas output unit.

A liquid filter apparatus for gas/solid separation includes a housing with a filter chamber, a semiconductor process gas inlet, and a process gas outlet. The filter chamber forms a liquid reservoir, and the semiconductor process gas inlet and the process gas outlet are in communication with the filter chamber. The housing further includes a filter liquid inlet and a filter liquid outlet, which are in communication with the liquid reservoir for delivering and removing filter fluid, respectively, to and from the liquid reservoir.

A waste gas purification system includes a gas container, a gas input unit, a gas output unit, and a contaminant capturing apparatus disposed in the gas container. The contaminant capturing apparatus includes a driver device, and a capturing device to be driven by the driver device. The driver device includes two rollers, and the capturing device includes a tape disposed to continuously move from one roller to another roller when the rollers are rotating. The tape has a surface coated with an adhesive to purify waste gas entering from the gas input unit by capturing particulate matter in the waste gas before being discharged via the gas output unit.