Refinement gas flow rate control manner null of pressure difference regenerative mode adsorption

摘要

PURPOSE:To make the flow rate and the pressure of purified air constant by previously increasing the flow rate of the inlet of an adsorption tower in accordance with the changeover time of the adsorption tower before the adsorption tower is shifted to a pressurizing process. CONSTITUTION:An air compressor 1 is subjected to loading operation by previously operating the inlet guide vane 8 of the air compressor 1 with a control device 9 before a fixed time when a pressure swing adsorption type (PSA) adsorption tower 2 is shifted to a pressurizing process at a time for finishing a regenerating process thereof. Then the pressurizing process is started and even if one part of purified air is sent to the PSA adsorption tower 2 through an inlet changeover valve 7 of pressurized gas, purified air is increased and therefore the same amount as purified air before pressurization can be sent out.