| 摘要 |
This invention relates to a method and apparatus in a circular processing space (1), such as a settling tank or a like, wherein the apparatus comprises mechanical processing means at least for guiding sludge present on a bottom of the processing space (1) out of the processing space by means of one or more bottom scrapers (2a) rotatable around a center (x) of the processing space through a bottom outlet arrangement (3) present at the bottom of the processing space, wherein the bottom scraper is coupled by its first end stationarily with an auxiliary frame (A) at the center of the processing space, wherein the bottom scraper (2a) is being moved by means of a power transmission arrangement, being in a power transmitting connection with its other end, the power transmission arrangement comprising an endless power transmission chain (5) that moves in connection with walls of the processing space (1) by influence of operating means through a drive and idle wheel arrangement (4a, 4b). The power transmission chain (5) is being moved by a power transmission arrangement that comprises at least two apart from each other placed drive wheels (4a', 4a") particularly in order to minimize strain directed to the power transmission chain (5). |
