| 摘要 |
<p>The two plates (2, 3) have the same corrugated profile and are fixed together in linking zones defining a plane of symmetry (P) for the tubes (4) defined by the plates. The crests and valleys of the corrugations are inclined with respect to a first edge of the plate by a non-zero angle and which surrounds with the other plate inclined decantation tubes - The angle of inclination alpha is between 45 and 65 degrees., preferably between 55 and 60 degrees. The crests and valleys are trapezoidal in form so the decantation tubes have a hexagonal section. The crests (2A, 3A) and valleys (2B, 3B) have identical shapes and the two plates are symmetrical with one another about the plane of symmetry of the tubes. The two plates are identical and are rectangular, with the tubes rectilinear over their whole length. An INDEPENDENT CLAIM is made for a decantation block made of several plates of which at least one pair are as described above. The block has at least two modules joined together so the modules together define other tubes of the same section as the tubes in each module. The modules are identical. The block is in the form of a rectangular parallelepiped, with the plates parallel to one of the faces of the block. The plates extend perpendicular to the smallest dimension of the block and the block is arranged so that the plates are vertical and the first edge horizontal. The block has seating elements by which the block can be held suspended from or rested on a fixing system. At least two identical blocks can be juxtaposed so the tubes of one block are the extension of the tubes in the other. The block is placed near a vessel wall to which the plates are perpendicular, leaving a space between the wall and the block. The tubes have a hydraulic diameter of between 40 and 100 mm and their length is between 15 and 30 times their diameter.</p> |
