Oxygen is an important industrial gas, widely used in steel, non-ferrous metallurgy, chemical industry, furnace energy saving, environmental protection (sewage treatment, waste incineration, etc.), glass, papermaking, medical and other industries. Lithium molecular sieve adsorbents appeared in the 1990s, and PSA air-separation oxygen production rapidly developed into a new low-cost oxygen production technology and began to be widely used.
Vacuum pressure swing adsorption oxygen production (VPSA-O2) The low-pressure raw air (25-39kPa) is sent by a blower, which is purified to remove dust and enter VPSA-O. 2 system adsorption tower. The adsorption tower is a two or three tower system, and the product gas of the adsorption tower is oxygen. After the nitrogen, carbon dioxide, and water vapor in the air are adsorbed to reach the set control value, because the adsorption pressure is low, desorption through atmospheric pressure is performed first, and then a vacuum pump is used to reach a certain degree of vacuum, so that the adsorbent impurities in the adsorption tower are completely desorbed. regeneration. Adsorption separation oxygen generation system composed of two or three columns, under the control of PLC or DCS (data control system), the program control valve is switched cyclically to complete continuous oxygen generation. This process is usually called the vacuum pressure swing adsorption oxygen production process (VPSA-O2).
Oxygen production has low energy consumption. Compared with similar domestic technologies, the power consumption is 10-30% lower.
Easy to operate and convenient to start and stop (startup time is less than 30 minutes).
Small footprint, low maintenance costs, low installation and civil costs.
Advanced process flow, high degree of automation, flexible operation and high long-term operation reliability.
Oxygen production scale: 100 ～ 40000Nm³ / h
Oxygen purity: adjustable from 21 to 95%
Oxygen consumption: 0.32 ～ 0.38kW · h / Nm³ when the oxygen purity is 100%