Percolating the preprocessing liquid which is recovered from the hull cleaning device which cleans

摘要

PROBLEM TO BE SOLVED: To provide a filtration apparatus for a paint pretreatment liquid which enables an efficient removal of metallic powder and waste textile contained in the pretreatment liquid with a simple constitution.;SOLUTION: The filtration apparatus 5 for the paint pretreatment liquid has a liquid pouring part 24 and a drainage part 25, and is provided with a case 21 capable to pool cleaning water W1 recovered from a car body washing apparatus, and a plurality of filters 22 provided in a multiple-stage form from the upstream toward the downstream in the case 21, and at predetermined intervals. In the case 21, when the filter 22 of the former stage is clogged, the cleaning water W1 getting over the upper end of the former stage's filter 22 is filtered by the subsequent stage's filter 22 to remove the waste textile and iron powder contained in the cleaning water W1.;COPYRIGHT: (C)2009,JPO&INPIT