| 摘要 |
A method and exhaust arrangement in the removal of surface scum. An exhaust arrangement is used existing in connection with a liquid basin. The exhaust arrangement includes a first surface chute arrangement for removal of surface scum utilizing an overflow arrangement, belonging to the first chute arrangement and being based on a continuous flow for overflowing the surface scum in at least two successive phases, from the fluid basin into a primary space in the fluid basin and from the primary space into a secondary space in the fluid basin, from where overflow is finally exhausted from the liquid basin utilizing an exhaust assembly for the surface scum. A second surface chute arrangement removes liquid processed in the liquid basin. Overflow of the surface scum in the primary space to the secondary space is controlled to minimize the amount of liquid drifting together therewith by adjusting a level of the liquid in the primary space utilizing a flow balancing assembly that connects the primary space and the second surface chute arrangement and/or by using an adjusting device existing in the wall defining the primary space and the secondary space. Passage of the surface scum in the primary space towards the secondary space is made more efficient by using a guiding arrangement for achieving a liquid flow in the primary space towards the secondary space to direct the surface scum. |
