| 摘要 |
In a process and assembly to extract oxygen from air, the pressure is alternated in an assembly with two or more synthetic zeolite adsorption units (1, 2). The zeolite adsorption units (1, 2) are linked to and operated alternately in conjunction with a blower (3) for adsorption air and a vacuum pump stand (12) which effects desorption of the respective adsorption unit (1,2). The vacuum pump stand (12) has two vacuum pumps (13, 14) linked in series. The novelty is that: (a) a single common pipe (10, 11) leads into each adsorption unit (1, 2) from a distributor pipe (5), and forming the high pressure and low pressure vacuum link; (b) air (8, 9) and vacuum valves (6, 7) are located on both sides in tubes (10, 11) to the distribution tube (5); (c) both outer ends of the vacuum pump stand (12), distributor tube (5), and the centre of the distributor tube (5) between the air valves (8, 9) are linked to the air blower (3) by a tube (4); (d) seen from the direction of flow, the second vacuum pump is a pre-inlet cooled rotary pump with cooling air inlets providing a defined inflow of ambient air at atmospheric pressure; (e) the first vacuum pump (14) is linked to the second vacuum pump (13) outlet through a water-injector or heat-exchanger without any gas cooling; and (f) the assembly operates at between 300 mbar and 500 mbar. Also claimed is an operating process. |
