Industrial application of delayed coking unit blending the catalytic oil slurry with small proportion

Catalytic clarification oil can be blended in the delayed coking device with small proportion to solve the problem of oil slurry outlet. The experimental results of Dushanzi petrochemical 1.2 Mt/a delayed coking device showed that: ① it had minor effect of small proportion of blending catalytic oil slurry on heat exchange of the coking unit; ② the yield of wax oil and coke slightly increased, dry gas and the liquid yield slightly decreased; ③ it had no effect on coke quality and process operation; ④ the coking trend of heating furnace tube didn't increase after blending, and it also didn't cause the damage of equipment; ⑤ the economic benefit reached 1 328×10⁴ RMB yuan per year after blending catalytic oil slurry, which showed it was feasible for blending catalytic oil slurry with small proportion.