Patent ID: 8449738

Claim:
Apparatus for the removal of gasses from a number of electrolysis cells, comprising a suction duct for each cell, each suction duct being connected to a central manifold with a gas treatment centre and a central suction fan, wherein a flow restriction device is provided in each suction duct, and wherein one or more additional ductworks are provided, each additional ductwork for one or more suction ducts, wherein each additional ductwork has a branch for each suction duct, the branch being connected to the suction duct between the electrolysis cell and the flow restriction device, which one or more branches are connected to a booster duct in which an on/off valve is present, one or more booster ducts being connected to a booster manifold which is connected to the central manifold, a booster fan being provided in the booster manifold.