The MPC Automatic Control System of the Air Separation Unit

Air separation units for metallurgical or chemical industries.

With the rapid development of large and ultra-large air separation units, gas production capacities are increasing. When customer demand changes, if the unit load cannot be adjusted promptly, it may result in significant product surplus or shortage. As a result, the industry's demand for automatic load change is increasing.

However, large-scale variable load processes in air separation plants (especially for argon production) face challenges such as complex processes, severe coupling, hysteresis and non-linearity. Manual operation of variable loads often results in difficulties in stabilizing working conditions, large component variations and slow variable load speeds. As more and more users require variable load control, Shanghai LifenGas was prompted to research and develop automatic variable load control technology.