In recent years,liquefied air energy storage(LAES)with high efficiency and high energy storage density has attracted particular attention.The cryogenic separation process(ECSP)in the ethylene production plant involves a variety of substances with complex physical properties.The two technical methods are different and the industry span involved in the two processes is large.Therefore the coupling difficulty between LAES and ECSP is relatively high.The progress of green power technology provides an extremely favorable tech-nical foundation for reducing carbon dioxide emissions from ethylene plants.Optimize the fuel consumed for heating and cracking raw materials in the cracking furnaces of existing ethylene industrial production plants to electric energy heating.The high-pressure steam generated by the quench boilers,which originally drives the three major compressor sets of the ethylene plant through steam turbines,is optimized to be driven by electric motors.Use the electric energy generated by the LAES expansion generator set to heat and crack raw materials in the cracking furnaces and drive the three major com-pressor sets by electric motors,thereby reducing fuel consumption and sepa-rating ethylene products and propylene products of the ethylene plant through the three major compressor sets and ECSP.Meanwhile,the high-pressure steam generated by the quench boiler of the ethylene plant drives the LAES air compressor,thus bringing out the optimal coupling and synergistic effect between LAES and ECSP.With the process parameters of LAES remaining unchanged,compared with the separation process of conventional ethylene plants,the adoption of the coupling of LAES and ECSP can significantly re-duce the total power of compressors in the sequential separation,front-end deethanization and front-end depropanization process flows and can also greatly reduce the carbon dioxide emissions of the ethylene plant.
Liquid Air Energy Storage(LAES)Ethylene Cryogenic Separation Process(ECSP)coupling processcarbon dioxide emission reduction
NETL
NSTL
万方数据
