Device and method for preparing oxygen by seven-tower low-voltage adsorption vacuum desorption

The invention discloses a device and a method for preparing oxygen by seven-tower low-voltage adsorption vacuum desorption. The device comprises three air blowers, three vacuum pumps, seven adsorption towers, two equalizer tanks and an oxygen buffering tank, wherein the inlets of the seven adsorption towers are connected and are connected to the three air blowers and the three vacuum pumps; the outlets of the seven adsorption towers are connected and are connected to the oxygen buffering tank; the seven adsorption towers are respectively connected with the two equalizer tanks through pipelines. When the technical scheme of the invention is adopted, oxygen output and yield can be improved, and the defects of low oxygen use ratio, low adsorbent use ratio and high equipment construction cost of a existing VPSA (Vacuum Pressure Swing Adsorption) oxygen production technology are eliminated. 本发明公开了种七塔低压吸附真空解吸制备氧气的装置和方法，该装置包括3个鼓风机、3个真空泵、7个吸附塔、2个均压罐和氧气缓冲罐，其中7个吸附塔的进口相连，并连接到3个鼓风机和3个真空泵，7个吸附塔的出口相连，并连接到氧气缓冲罐，7个吸附塔通过管道分别都