Isentropic expansion is more effective than throttle expansion in terms of temperature effect and cooling capacity. Moreover, the expander can also recover part of the expansion work, which can improve the economy of refrigeration. However, the throttling valve is simple in structure, easy to adjust and can work in the gas-liquid two-phase zone. Especially when the initial temperature is low, the cooling capacity of throttling is enhanced, isentropic expansion is weakened and the gap between the two this cooling capacity is reduced, throttling in large air separation unit is more favourable.
Dear Air Separation has advanced system control technology, including DCS instrumentation control system and its configuration, PLC instrumentation control system, conventional instrumentation control system, conventional electrical control system, DCS instrumentation control system, microcomputer integrated protection control system, etc. Dear Air Separation develops innovative process technology to extend the product life cycle.
