Energy Utilization Optimization And Carbon Emission Accounting Of FCC Unit

Catalytic cracking industry is an important energy producing process and an intensive energy consumption industry.A large amount of energy is consumed in refining process and lots of CO₂ emissions are also produced increasing influence on the greenhouse effect.Catalytic cracking is a typical equipment in oil refining industry,and it is of great significance to scientifically analyze its energy-use process,optimize the operating parameters to reduce energy consumption,and roundly evaluate the carbon emissions in the productive process.This paper focuses on a FCC unit.An Aspen Plus model of the main distillation column and absorption and stabilization system was built,and use BK10 as property method after contrast was used.The model can accurately simulate the practical operation of the device with the calibration data error in a reasonable scope by comparison of flow distribution,ASTM D86.The device was calculated by standard energy consumption and heat balance calculation of reaction process and reactivation process,which shows the energy-use is at a high level.A three-link model was used to analyze the device energy,and the energy flow chart shows the device’s efficiency at a medium level,but there is also much energy saving potential.The device parameters such as temperature,cycle flow,circulation catalyst flow were analyzed with the help of Aspen Plus.Appropriate numerical optimization was selected on the premise that the product quality is guaranteed.The Life Cycle Assessment（LCA）was used to conduct carbon emissions accounting of burning and secondary energy consumption;meanwhile,the carbon emission intensity was comprehensively analyzed.Results show that the regenerative burning is a major source of energy consumption and carbon emissions.