Abstract: A monolithic membrane-type filtration structure for filtering liquids, includes a support formed of a porous inorganic material of permeability Ks, the support having a tubular overall shape with a main axis, an upstream base, a downstream base, a peripheral wall delimiting an internal part and a plurality of passages parallel to the main axis of the support, formed in the internal part of the support, a membrane of permeability Km and of mean thickness tm covering the internal surface of the passages; the external hydraulic diameter of the structure satisfying the relationship Øf=?×[A+B×log10 (Ks×tm/Km)]; in which ? is a coefficient between 0.85 and 1.15, and A=?21570×entint2?18.6×Dh+19.0×eint?2.5×eext+0.1244 B=?11760×Dh×eint+9.7×eint+3.1×eext+0.04517. Dh is the mean hydraulic diameter of the passages, eint is the minimum thickness of the internal walls between the passages, eext is the minimum thickness of the peripheral wall of the filter.

Abstract: Refractory tile for protecting a wall of energy recovery tubes. A hot face of the tile is to be exposed to the interior of the furnace. A cold face, opposite the hot face, defines: a groove extending over the entire length of the tile and to receive one the tubes, and a fastening receptacle configured to receive a retaining member to immobilize the tile with respect to the tube. The tile has, in a transverse section plane, at least at each position between the position of the groove and the position of the fastening receptacle, a non-zero material thickness. The thickness is measured between the transverse profile of the hot face and a straight segment, which is referred to as the base and links the ends of the transverse profile of the hot face. The positions are determined along the base.

Abstract: A monolithic membrane-type filtration structure for filtering liquids, includes a support formed of a porous inorganic material of permeability Ks, the support having a tubular overall shape with a main axis, an upstream base, a downstream base, a peripheral wall delimiting an internal part and a plurality of passages parallel to the main axis of the support, formed in the internal part of the support, a membrane of permeability Km and of mean thickness tm covering the internal surface of the passages; the external hydraulic diameter of the structure satisfying the relationship Øf=?×[A+B×log10 (Ks×tm/Km)]; in which ? is a coefficient between 0.85 and 1.15, and A=?21570×entint2?18.6×Dh+19.0×eint?2.5×eext+0.1244 B=?11760×Dh×eint+9.7×eint+3.1×eext+0.04517. Dh is the mean hydraulic diameter of the passages, eint is the minimum thickness of the internal walls between the passages, eext is the minimum thickness of the peripheral wall of the filter.