What are the Advantages of Radial-Flow Adsorption Vessel Compared to Axial Adsorber?

(1) Energy Saving

The vertical adsorption vessel is a radial cylindrical-grid-structure vessel. Compared with the axial adsorption vessel, the adsorbent bed is thinner, and the resistance is smaller, thus reducing the air flow pressure and leading to the discharge pressure & power decrease of rotary equipment correspondingly. By calculation and practice, energy consumption of VPSA oxygen plant can be reduced by 10% to 15% using a radial adsorber.

(2) Structural Advantages

The VPSA oxygen generation plant adopts a radial adsorption vessel where the gas flow direction is favorable for adsorption and desorption. Due to the direct influence of airflow velocity on adsorption and desorption for which slower airflow is more propitious. In the adsorption phase, as the feed gas flows from outside to the inside, nitrogen is gradually adsorbed with gradual volume reduction of the gas, and the flowing cross section of the radial adsorber is gradually narrowed from outside to the inside. This structure increases the comprehensive utilization efficiency of the adsorbent and improves the stability of the adsorbent bed at the same time. The direction of the airflow is perpendicular to that of gravity, which effectively reduces the washing-away of the adsorbent and increases its service life.

(3) Small Plot Area

The radial adsorption vessel adopts a cylindrical absorbent bed structure to make full use of the space. The covering area is only half as large as that of the axial adsorber of the same scale.

(4) Better Adaptability of Production Capacity

Radial adsorption vessel doesn't have limitations of air volume. As the oxygen production capacity increases, it is necessary to increase the amount of feed gas and adsorbent, which can be solved by increasing the radial adsorber height When the equipment diameter is limited by transport or manufacturing.