A vessel baffle arrangement

摘要

A vessel (10) for containing granular material such as sieve material used in a pressure swing adsorption (PSA) plant is provided with a baffle (12) in the form of, for example, a plurality of concentric rings of comparatively small width (w) and large depth (d). The baffle (12) acts to reduce and possibly eliminate surface movement of the sieve material thus reducing damage thereto and improving sieve performance.