Air separation units for metallurgical or chemical industries.
With the rapid development of large and extra-large air separation units, the gas production volume of air separation units is getting larger and larger. Once the customer demand changes, if the load of the unit cannot be adjusted in time, there will be a large amount of product venting or undersupply, so the industry's demand for automatic load changing is getting stronger. However, because the air separation plant (especially the air separation with argon products) has complex processes, serious coupling, hysteresis, and non-linearity in the process of large-scale variable load, the manual operation of variable load has problems such as difficult to stabilize the working conditions, large fluctuations in components, and slow speed. so more and more users request variable load control, which drives Shanghai Lianfeng to carry out research and development of automatic variable load control technology.
1. It has been used in many sets of large air separation units because it is mature and reliable.
2. The in-depth combination of air separation process technology and energy-saving optimization effect is outstanding.
3. Targeted optimization of the air separation unit
Shanghai Lianfeng has a first-class team of air separation process experts who can combine the specific characteristics of air separation units and propose targeted optimization measures to effectively reduce the energy consumption of air separation unit operation. Moreover, Shanghai Lianfeng has developed the air separation MPC automatic control technology. It can realize the air separation process optimization in an automated way, which reduces the requirement for personnel and significantly improves the automation level of the plant.
After actual operation, our self-designed automatic variable load control system has achieved the expected goal and realized fully automatic load tracking and adjustment, with a variable load range of 80%–100% and a variable load rate of 0.5%/min, resulting in a 3% energy savings in air separation units, which greatly exceeds the expectation of the customer.