DETERMINATION OF LOCATION OF TERMINA-TOR IN FCC RISER REACTOR

The 60×10\+4 t/a RFCC unit in Petrochemical Refinery of Shengli Oilfield was analyzed and computed by using numerical simulating software developed by ourselves. The distributions of solid concentration of catalyst, temperature and product yields along the height of riser were obtained. The simulating results show that diesel oil and light fuel oil have excessive cracking reaction to some extent under present operating conditions. The optimum yields of desirable FCC products, diesel oil or light fuel oil, are achieved at 20 m in height of the riser according to the curve of the yields of products. The injection point of terminator is located at 23.5 m in height of the riser on the basis of theoretical analysis and the actual situation. The simulating results are important for the industry experiment.