Device for Treating an Upstream Flow with a Solid Product and Associated Treatment Method

A device (14) for treating an upstream flow over a solid product (24), comprising:

• a support (20),
• at least one basket (22A to 22E) supported by the support (20) and comprising a base structure (64), an upstream perforated wall (60) slidably mounted on the base structure (64), and a downstream perforated wall (62) slidably mounted on the base structure (64), wherein:
• the upstream perforated wall (60) and the downstream perforated wall (62) are each rotationally symmetrical about a central axis (A-A′), are each mounted freely movable over a given expansion travel radially relative to the central axis (A-A′) and freely movable over a given expansion travel relative to one another and to support (20), and between them delimit an intermediate space (70) for housing the solid product (24),
• the upstream perforated wall (60) delimits, on the opposite side to the intermediate space (70), an upstream flow conveying passage (90),
• the downstream perforated wall (62) delimits, on the opposite side to the intermediate space (70), a passage (92) for discharging a treated flow, and
• the passage (90) for conveying the upstream flow is situated radially on the outside relative to the passage (92) for discharging the treated flow with respect to the central axis (A-A′).