274results about How to "Guaranteed passability" patented technology

Provided is a suction type filtering-condensing apparatus which does not reduce filtering efficiency and can guarantee filtering performance. The apparatus comprises a filtering-condensing bath (12) for housing treated fluid including filtering-condensing objects, and a plurality of filter plates (14) arranged in the filtering-condensing bath (12) and extending vertically along the filtering-condensing bath (12). Each of the filter plates (14) includes a support plate (50) vertically rugged in its surface and formed into a net shape, and a bag-shaped filter cloth (18) for housing the support plate (50), so that a filter chamber (76) is formed by the inner face of the filter cloth (18) and the support plate (50), and so that a vertically extending main passage for the filtrate is formed between the inner face of the filter cloth (18) and the recess of the support plate (50). Further comprised are a suction means (16) for sucking the filter cloth (18) through the filtering-condensing bath (12), a filter cloth bulging means (20) for bulging the filter cloth (18) through the filtering-condensing bath (12), and a filtrate discharging pipe (38) communicating at its one end with the filter chamber (76). The suction type filtering-condensing apparatus is characterized in that the transverse length of the filter cloth (18) is set larger than the transverse length of the support plate (50), and in that a temporary auxiliary passage (99) for the filtrate is formed, at the time of filtration and condensation of the filtering-condensing objects in the filtering-condensing bath(12)undera predetermined negative pressure according to the suction means (16), to communicate with the filter chamber (76) and to extend vertically of the filter chamber (76).