The Research And Optimization Of Process Condition On PSA Hydrogen-purification Unit

The article principally researches process scheme, characteristic, process parameters and optimization of production operation on 40000Nm3/h pressure swing absorption hydrogen purification unit which is newly built by Daqing Petrochemical Company.We get the optimum process scheme which is suitable for the unit, through analysising and comparising different absorption schemes in the incipience of running of PSA. As to different operation conditions during pressure swing absorption actual operating, we propose to refer absorption cycle time, hydrogen yield and recovery rate as target of process characteristic, study and find out the interrelation between process parameters which influences each other and controls guideline; Through optimizing process conditions, we find out the best operation clicking in actual production, then confirm the best range of absorption cycle time, which make hydrogen yield of plant, hydrogen products purity and hydrogen recovery rate come up to the production requirement at the same time. We also expound other factors which effect on the hydrogen recovery rate and propose the suggestion of optimize operation.This research utilizes the data gathered automatically by DCS system during unit actually running. We fully consider various of process operation condition and disadvantages for the unit operating in winter and made rational study approach, and found out the unit process running law while finishing the unit examining. We discover the speed of butter valve impacts on hydrogen recovery rate, offering guidance for the newly built unit steady operation in the future.