| 摘要 |
PCT No. PCT/SE86/00486 Sec. 371 Date Jun. 17, 1987 Sec. 102(e) Date Jun. 17, 1987 PCT Filed Oct. 21, 1986 PCT Pub. No. WO87/02266 PCT Pub. Date Apr. 23, 1987.A filter arrangement comprises a belt filter for the separation of particles from a liquid, for which purpose the liquid is caused to flow towards the filter through an inlet (13) at one end of the filter, and the separated particles are collected at the opposite end. The belt filter consists of an endless filter belt (10) which runs over guide rollers (2, 3) in the direction of the water as it flows in, and supports and drains the particles as they are conveyed on an upper, forward-moving part of the filter belt from one end to the opposite end over a first drainage zone. A second drainage zone is arranged on the upper part (11) of the belt by the arrangement of a drainage arrangement (17) which comprises a blower unit (18) extending across the entire width of the filter belt (10) to direct currents of air against the under-side of the upper part (11) of the filter belt (10), so as to blow water from the belt and the particles over the second drainage zone. A deflector device ( 19) situated on the upper side of the upper part of the filter belt above the blower device is arranged to guide the water blown by the current of air in the direction of the deflector device back onto the upper side of the filter belt in front of the second drainage zone, against the direction of transport of the upper part of the belt. |
