| 主权项 |
1. An installation for drying a non-woven web which comprises:
a fan (6) with a delivery and an intake, a heating oven (3) having an inlet and an outlet, an inlet conduit (C1) which has a branch and which connects the delivery of the fan (6) with the inlet of the oven (3) and sends delivered air to the inlet of the oven, a heat source (4) arranged in such a way that the air delivered in the inlet conduit (C1) is heated, an outlet conduit (C2) which connects the outlet of the oven (3) with the intake of the fan (6), a branch conduit (C3), in the branch of the inlet conduit (C1) upstream of the heat source (4), connecting the inlet conduit (C1) with an inlet of a drying device (10, 11), a means of transport (2) which displaces a web in the drying device (10, 11) and in the oven (3), the drying device (10, 11) being upstream of the oven (3) in the direction of displacement of the web, and a conduit (C4) for extracting the air from the drying device (10, 11),characterised in that
the drying device (10, 11) comprises a diffusion chamber (10) having an inlet and an outlet fitting (21) in which there is mounted a perforated sheet (24), and the perforated sheet (24) has perforations and has a void-rate gradient that decreases from the inlet of the diffusion chamber (10). |
