Hydrocarbon material lift pipe reactor

Abstract

The present invention relates to a life pipe reacor for hydrocarbon raw material. The interior of said life pipe reactor is divided into a prelift stage and three reaction stages from bottom to top. Said prelift stage and three reaction stages are coaxially series-connected, the lower portion of said prelift pipe is equipped with a catalyst inlet pipe, and its bottom portion is equipped with a prelift medium connecting pipe. Said invention also provides the concrete structure of every stage of the above-mentioned three reaction stages. Said invention belongs to the field of petroleum refinery equipment technology, its structure is reasonable and its reaction effect is good.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining equipment, in particular to a riser reactor for catalytic conversion of hydrocarbon raw materials used in the petroleum refining process. Background technique [0002] Catalytic cracking unit is one of the important devices for secondary processing of raw oil in refinery. In the catalytic cracking unit, hydrocarbon feedstock undergoes gas-solid phase cracking reaction in the presence of a catalyst. The riser reactor is the core equipment of the catalytic cracking unit. The existing reactor usually adopts a riser reactor with equal diameter. The gas phase velocity of the reactant at the reactor inlet is generally 5-8 m / s. The material is not broken and decomposed, the macromolecule becomes a small molecule, the number of moles continues to increase, and the outlet flow rate has increased to 15 to 18 m / s. The height of the riser reactor is generally more than 30 meters, and the reaction...

AI Technical Summary

Problems solved by technology

Chinese patent application 98125665.1 improves the structure of the riser reactor. According to the substantially equal gas phase flow rate, the cross-section of the reactor is designed to be in the form of a curve that gradually increases upwards in the axial direction, so that the height of the reactor is greatly reduced. Engineering is difficult to achieve

But the rear reaction zone of riser of this invention, i.e. c zone and d zone are still conventional forms, can not improve the reaction of this part

The above-mentioned reactor structure cannot be well adapted to the reaction conditions in it, and the formed fluidized state will adversely affect the operation of the device, especially if it cannot be coordinated with the reaction process, which is not conducive to improving product yield and quality

Images