With the construction and operation of many LNG receiving stations

the application of LNG cold energy in air separation has become an important direction. The current research on LNG cold energy air separation lacks quantitative analysis of case benefits. Taking an LNG receiving station as an example

the process parameters of cold energy air separation are designed and the economic and energy saving benefits are analyzed. Ethylene glycol and internal circulating nitrogen are used as the intermediate medium to transfer LNG cold capacity in the process design The system mainly includes air filtration and compression system

air purification system

air separation distillati

on system

LNG heat transfer cold box system

cryogenic liquid storage system

ethylene glycol circulating cooling system and nitrogen pipe network system.The production scale is 614.5 t/d liquid air separation products and 8 000 Nm

3

/h nitrogen. The results show that the power consumption is about 50% of the conventional air separation project

which is expected to save 70 653 700 kW·h

equivalent to 20 100 tons of standard coal

and reduce CO

2

by 52 300 tons annually. The payback period is about 5.06 years. It has good social and economic benefits and is beneficial to reduce the overall energy consumption of the chemical industrial park.