Lamella and lamellar module for clarifier
A lamella for a clarifier, including a plate provided with longitudinal straight ribs extending from the top part of the plate to the bottom edge, and longitudinal straight folds provided with wings and which are interposed between each pair of ribs to form projections with V-shaped walls that project in the sagittal direction. A top transverse fold provided in the top part, which defines a flat portion extending backwards towards a top edge. A bottom transverse fold that curves the bottom part backwards.
1. A lamella for a clarifier comprising a rectangular or square plate, made of a single piece, wherein the plate is provided with:
a plurality of longitudinal straight ribs running from the top part of the plate to the bottom edge thereof,
a plurality of longitudinal straight folds, each of the folds extending from the top part of the plate to the bottom edge thereof and each of the folds being interposed between a pair of longitudinal ribs, so that the space comprised between the pair of longitudinal ribs defines a projection with V-shaped walls that projects forward in the sagittal direction and on which corner the longitudinal straight fold is located;
a plurality of wings, one of said plurality of wings being arranged on the front part, in the sagittal direction, of each longitudinal straight fold and another of said plurality of wings further being arranged on the rear part, in the sagittal direction, of each longitudinal straight fold;
four end wings; one end wing being arranged on the front part, in the sagittal direction, of each of the longitudinal edges of the plate and one end wing further being arranged on the rear part, in the sagittal direction, of each of the longitudinal edges of the plate;
a top transverse fold provided in the top part of the plate and defining a flat portion extending backwards in the sagittal direction a constant distance from the fold point to the top edge of the plate; and
a bottom transverse fold provided in the bottom part of the plate, such that the bottom part curves backwards in the sagittal direction.
2. The lamella of claim 1 , wherein the wings and the end wings extend from the top part of the plate to the bottom edge thereof.
3. The lamella of claim 1 , wherein the plate is a plastic plate manufactured using plastic injection technology.
4. The lamella of claim 2 , further comprising at least one longitudinal straight structural fold running from the top part of the plate to the bottom edge thereof, the structural fold being interposed between a pair of longitudinal straight ribs, so that the space comprised between the pair of longitudinal ribs defines a structural projection with V-shaped walls that projects forward in the sagittal direction and on which corner the structural fold is located, the angle defined by the V-shaped walls of the structural projection being more acute than the angle defined by the walls of a conventional projection.
5. The lamella of claim 4 , further comprising a plurality of structural wings, one structural wing being arranged on the front part, in the sagittal direction, of each longitudinal straight structural fold and one structural wing being further arranged on the rear part, in the sagittal direction, of each longitudinal straight structural fold.
6. The lamella of claim 4 , wherein a structural fold is equipped with at least one anchoring point that comprises a perforation intended to house a supporting element.
7. The lamella of claim 6 , wherein at least one structural fold is equipped with a top anchoring point that comprises a perforation closest to the top transverse fold and a bottom anchoring point that comprises a perforation located in the bottom part and below the bottom transverse fold.
8. The lamella of claim 1 , wherein the flat portion of the top part is provided, on each of its two longitudinal edges, with a top longitudinal closure.
9. The lamella of claim 1 , in which, for each of the longitudinal straight ribs of which the plate consists, a V-shaped deflector is provided, the V-shaped deflectors being arranged in the flat portion of the top transverse fold.
10. The lamella of claim 4 , wherein the bottom surface of the flat portion of the top part is provided a plurality of protrusions, each of the protrusions being aligned with one of the longitudinal straight folds or one of the longitudinal straight structural folds of the plate.
11. A lamellar module for a clarifier, comprising two or more lamellae according to claim 1 , arranged in a parallel manner without direct contact with one another and attached to a supporting element.
12. The lamellar module of claim 11 , wherein the lamellae are arranged in such a way that:
the bottom part of the plate of each of the lamellae has an inclination of between 65 and 80° relative to the horizontal and the intermediate part of the plate, comprised between the top transverse fold and the bottom transverse fold, has an inclination between 45 and 65° relative to the horizontal; and
the flat portion of the top part of the plate of each of the lamellae forms an angle with the horizontal comprised in the range between 10° and −10°.
13. The lamellar module of claim 11 , wherein:
each of the lamellae is provided with at least one structural fold equipped with a top anchoring point that comprises a perforation closest to the top transverse fold and a bottom anchoring point that comprises a perforation located in the bottom part; and
the supporting element comprises at least two groups of threaded rods, the first group of threaded rods being arranged so that they cross the perforations in the top anchoring point of the lamellae and the second group of threaded rods being arranged so that they cross the perforations in the bottom anchoring point of the plates of the lamellae.
14. The lamellar module of claim 13 , further comprising:
at least one top spacer, arranged at a top anchoring point of a lamella(S), the top spacer being provided with a through hole to allow at least one of the threaded rods of the first group to pass through the same; and
at least one bottom spacer, arranged at a bottom anchoring point of a lamella, the bottom spacer being provided with a through hole to allow at least one of the threaded rods of the second group to pass through the same.
15. The lamellar module of claim 14 , wherein the bottom spacers arranged in the vicinity of the bottom edge of the lamellae are preferably provided with coupling means for coupling to a supporting base.
16. The lamellar module of claim 12 , wherein:
each of the lamellae is provided with at least one structural fold equipped with a top anchoring point that comprises a perforation closest to the top transverse fold and a bottom anchoring point that comprises a perforation located in the bottom part; and
the supporting element comprises at least two groups of threaded rods, the first group of threaded rods being arranged so that they cross the perforations in the top anchoring point of the lamellae and the second group of threaded rods being arranged so that they cross the perforations in the bottom anchoring point of the plates of the lamellae.
17. The lamellar module of claim 16 , further comprising:
at least one top spacer, arranged at a top anchoring point of a lamella, the top spacer being provided with a through hole to allow at least one of the threaded rods of the first group to pass through the same; and
at least one bottom spacer, arranged at a bottom anchoring point of a lamella, the bottom spacer being provided with a through hole to allow at least one of the threaded rods of the second group to pass through the same.
18. The lamellar module of claim 17 , wherein the bottom spacers arranged in the vicinity of the bottom edge of the lamellae are preferably provided with coupling means for coupling to a supporting base.