| 摘要 |
The invention is concerned with the clarification of waters that contain usable sludge, fibres or equivalent. The objective is to recover the usable material, e.g., as fuel and at the same time to prevent pollution of waters. According to the invention, the separation of the solids, such as fibres and any other utilizable material, from the water takes place so that the water containing solid material is fed into or onto a mobile and utilizable layer of material placed on a perforated moving base, e.g. a wire-bottom conveyor (5), so that this material layer functions as a filter. The invention is in particular suitable for the wood processing industry, wherein the water coming from the barking drum (1) is passed into a clarifier tank (7), from which the water containing fibres is pumped onto a layer of bark material carried on a wire-bottom conveyor (5), whereby the bark layer filters the water passing through the bark layer. Likewise, water containing solids can be pumped from a waterway or clarifying basin into or onto a bark layer placed on a wire-bottom or equivalent conveyor to be filtered there, whereat the solids in the water remain in the bark material and pass along with the bark material, e.g. into a dewatering drum, and the water filtered through the bark layer passes back into the waterway or clarifying tank. The filtered warm "circulating water" collected in the upper part of the clarifying tank (7) is pumped back into the barking drum (1). |
