Riser catalysis device for processing heavy oil and application thereof

Abstract

The invention relates to a riser catalysis device for processing heavy oil and application thereof. An upper riser of a primary riser is an outlet section of which the radial diameter is equal to or less than that of a lower riser of the primary riser; the lower riser is provided with a lifting steam inlet, an inferior heavy oil inlet and a regenerative inclined pipe; an expanded riser is positioned at any position of 20 to 95 percent of the height of the primary riser; the height of the expanded riser is 20 to 75 percent of that of the primary riser; the ratio of the diameter of the expanded riser to that of the lower riser of the primary riser is (1.0-3.0):1; an interface of a secondary riser and the primary riser is positioned on the upper side or lower side of the expanded riser of the primary riser or on a middle lower part of the expanded riser; an inclined angle gamma at the interface of the primary riser and the secondary riser is 0 to 90 degrees. Therefore, severe adsorption competition between inferior materials and high-quality materials and reaction retardation are avoided, the problem that the inferior materials have insufficient reaction depth in a reactor is solved.

Description

technical field [0001] The invention relates to a catalytic device and application of petroleum hydrocarbons under non-hydrogen-facing conditions, more specifically, a riser catalytic cracking device for processing low-quality heavy oil and its application. Background technique [0002] In order to strengthen the catalytic reaction in the reaction process, reduce thermal cracking reaction and unfavorable secondary reaction, the representative process technology is the two-stage riser catalytic cracking technology disclosed by CN1118539C, CN1262625C, etc., which is characterized by two-stage riser reaction Catalysts are used in series and relay mode to achieve the purpose of oil-gas series connection, catalyst relay, staged reaction, shortening reaction time and improving the average performance of catalysts. When this type of technology processes wax oil with better raw material properties, the yield of light oil is higher, especially the yield of diesel oil and cetane numbe...

AI Technical Summary

Problems solved by technology

[0006] The technological feature of the present invention is that high-quality raw material oil (represented by wax oil) and inferior raw material oil (represented by residual oil) are not blended, and directly or after pretreatment respectively enter different reactors at the lower part of the riser adopted, In order to realize the optimized processing of raw materials with large differences in properties, thereby effectively avoiding the vicious adsorption competition between the inferior raw materials and the high-quality raw materials in the conventional catalytic cracking riser reactor and the retardation of the reaction, and also overcome the inferior part of the raw materials in the Insufficient Reaction Depth in Conventional Riser Reactor

Images