| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems of a conventional example by turning a rake to a release angle, making light-weight and highly-floating impurities such as PET bottles jump out from the rake and surface, and recovering them by raking them up with the rake. <P>SOLUTION: 1) In a tunnel type dust removal screen, an arcuate rake is held at the release angle so that the light-weight and highly-floating impurities are easily released from the arcuate rake and moved to a water surface at the beginning, the arcuate rake is rotated to turn the angle to an original impurity rake-off angle when lowering them along the dust removal screen, and the highly-floating impurities made to jump out from the arcuate rake and surfaced are raked up by the arcuate rake and recovered. 2) For the dust removal screen, dust removal piping is connected to its one end, means for generating forced stream is attached to the dost removal piping, and the impurities are washed away to the downstream side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
