Arrangement for fastening filter cloth to solid-liquid separator

A filter unit for a disc filter, wherein the disc filter comprises a body portion that is rotatable around its horizontal axis and on whose periphery are arranged two or more filter units that form a disciform structure;

• the filter unit comprises a sector element, a filter cloth and a fastening strip;
• the sector element comprises a neck portion for fastening the sector element to the body portion of the disc filter, a flat substantially triangular hollow blade portion comprising an outer edge at the edge opposite to the neck portion, lateral faces transverse to the direction of rotation and flank surfaces in the direction of rotation;
• the flank surfaces of the sector element are provided with holes and act as filter surfaces;
• the filter cloth is arranged against said filter surfaces,
• the sector element comprises at least one fastening groove, wherein a fastening strip is arranged for fastening the filter cloth on the sector element;
• and
• the fastening strip is an elongated piece having a substantially T-formed cross section and comprising
• (a) a fastening portion made from flexible material and so dimensioned that it is deformed when inserted into said fastening groove and generates a fastening force and
• (b) a support portion that is transverse to the fastening portion and remains outside the fastening groove and extends to a predetermined distance from the edge of the fastening groove.

A drum filter comprising

• a body portion, which is an elongated tubular piece rotatable around its horizontal axis,
• a plurality of filter elements arranged adjacent each other on the periphery of the body portion, the filter elements comprising hollow spaces substantially in the shape of a toroidal sector in the longitudinal direction of the body portion, the periphery of the filter elements being provided with holes, and the outer peripheries of adjacent filter elements together forming the filter surface of the drum filter,
• one or more fastening grooves provided on the periphery of the drum filter, and
• a filter cloth fastened by means of one or more fastening strips to said one or more fastening grooves, the filter cloth being arranged against the filter surface of the drum filter, and wherein
• the fastening strip is an elongated piece having a substantially T-formed cross section and comprising
• (a) a fastening portion made from flexible material and so dimensioned that it is deformed when inserted into said fastening groove and generates a fastening force, and
• (b) a support portion that is transverse to the fastening portion and remains outside the fastening groove and extends to a predetermined distance from the edge of the fastening groove.