Gas-distributing tray for the bottom of a gas/liquid contact column comprising a zone for collecting liquid partially overlapped by gas chimneys

A gas-distributing tray (20) suitable for a column for exchange of heat and/or of material between a gas (g) and a liquid (l), said tray comprising an upper face and a lower face, a plurality of protruding chimneys (80) which are substantially parallelepipedal and parallel to one another over a portion (21) of the upper face of said tray (20) for the exclusive passage of said gas (g) through said tray (20), and a zone for collecting said liquid (90) comprising two diametrically opposite weirs (91, 92) for collecting said liquid (l) on said tray (20), said chimneys (80) each comprising an element for distribution of the gas (82) of the same shape as the chimney, said element for distribution of the gas (82) of at least one of said chimneys partially overlapping the zone for collecting said liquid (90) and the length of the element for distribution of the gas (82) of at least one of the said chimneys being greater than the width (L) of the portion (21) of the upper face of said tray supporting the chimneys (80), which is defined as being the distance separating the two weirs (91, 92).