초록 ▼

The invention maintains a nearly constant cycle pressure ratio along with a balancing of the adsorbent vessel effluents in a pressure swing adsorption process. The invention monitors cycle pressure ratio and subsequently alters the cycle step times and flows to sustain its value, thereby maximizing

The invention maintains a nearly constant cycle pressure ratio along with a balancing of the adsorbent vessel effluents in a pressure swing adsorption process. The invention monitors cycle pressure ratio and subsequently alters the cycle step times and flows to sustain its value, thereby maximizing plant performance and avoiding unnecessary shutdowns. Maintaining a nearly constant pressure ratio assures that the plant production is optimized and that power consumption is minimized. The balancing of the adsorbent vessel effluents, using the corresponding waste purities, is used to further improve plant production.

대표청구항 ▼

[ What is claimed is:] [1.]1. A pressure swing adsorption (PSA) method for removing a preferred gas from a gas mixture, said method performed by at least a first adsorbent bed and a second adsorbent bed operating over plural cycles, each cycle comprising plural steps wherein each bed proceeds throug

[ What is claimed is:] [1.]1. A pressure swing adsorption (PSA) method for removing a preferred gas from a gas mixture, said method performed by at least a first adsorbent bed and a second adsorbent bed operating over plural cycles, each cycle comprising plural steps wherein each bed proceeds through both adsorption and desorption actions, said method comprising the steps of:a) monitoring, in a cycle, a maximum feed pressure to each said bed of said gas mixture during adsorption therein;b) monitoring, in a cycle, a minimum evacuation pressure from each said bed of said gas mixture during desorption therefrom; andc) altering individual step times within a cycle, in accord with pressures monitored in steps a) and b), to control flows to and between said first adsorbent bed and second adsorbent bed in order to optimize and achieve maximum production.