In order to reduce the non-uniformity of the flow distribution caused by excessively high bed

a new parallel connection device is presented. A mathematical model for a parallel connection vertical radial flow adsorber is established to simulate the flow field in the adsorption bed

and the characteristics of pressure drop and radial velocity profiles are obtained. This flow distribution is compared with that with height-increasing method with the same bed height. It is shown that the non-uniformity of radial static pressure drop and the energy passing through the bed are reduced significantly by using the parallel connection device. The revamped adsorber can maintain a high level of uniformity in the adsorption bed and avoid the influence of excessive height. The adsorption bed thickness of the upper unit is optimized to ensure the two units to be saturated simultaneously.