Patent ID: 7025336

Claim:
Apparatus for removing materials from a gas stream, comprising: a) a reservoir for liquid, b) an inlet channel in fluid communication with the reservoir, c) a perforated sheet located above the reservoir, wherein the perforated sheet defines an inlet area below the sheet and an outlet area located above the sheet, the outlet area and the inlet area of the perforated sheet being free of any barrier in contact with the sheet except at ends of the sheet, the perforated sheet being positioned such that substantially all fluid flowing from said inlet channel passes from the region below the sheet, through perforations in the sheet and into the outlet area, and d) a liquid transfer channel, the liquid transfer channel being located between an end of the perforated sheet and an exterior wall of the reservoir, the liquid transfer channel comprising a sole path for fluid flow between the reservoir and the outlet area except for fluid flow through the perforations, and wherein the perforated sheet is free of any barrier, in contact with the sheet, in the outlet area, to fluid flow into the liquid transfer channel, wherein a pressure difference between the outlet area and the inlet channel comprises a sole means for moving liquid from the reservoir into the outlet area.