Mixing device for vertical flow fluid-solid contacting.

摘要

A fluid mixing apparatus is provided for use in a vertical flow-solid contacting column having a fluid inlet and a fluid outlet at opposite ends, and two or more distinct beds (2, 12, 14) of particulate material, and which can be operated with single or dual phase fluid flow. The mixing apparatus comprises a barrier to vertical flow (8) positioned between two adjacent beds (2, 12) of particulate material, having a substantially imperforate outer area and at least one central opening for passing fluid between beds, and a fluid impingement compartment (7) located at the center of the barrier. The impingement compartment has vertical sides containing at least two similarly-sized inlet openings (16, 17) in communication with the upstream side of the barrier for admitting the fluid flow detained by the barrier into the compartment. The sides and inlet openings are arranged so that the projection of all inlet axial centerlines lie in a common horizontal plane and intersect at a point selected so that fluid entering the compartment will converge at a centerpoint equidistant from all inlet openings. Mixing is promoted by sizing the inlet openings to produce fluid jets having a length at least equal to the distance between the inlet openings and the centerpoint so that the fluid streams impact turbulently. Fluid leaves the impingement compartment through a fluid outlet (20) comprising the central opening of the barrier, which is in communication with the downstream side (10) of the barrier and provides a balanced flow out of the impingement compartment.