Spray nozzle for catalytic cracking lift pipe and application

Abstract

The invention relates to a spray nozzle for a catalytic cracking lift pipe and an application. The spray nozzle can simultaneously spray two raw materials and comprises a hydrocarbon oil I outer sleeve pipe, a hydrocarbon oil I inner sleeve pipe, a hydrocarbon oil I outer spray head, a hydrocarbon oil I inner spray head, a steam chamber, a hydrocarbon oil I and steam mixing chamber, a hydrocarbonoil II spray head and a hydrocarbon oil II circular atomizing chamber. The spray nozzle can be applied to a catalytic cracking lift pipe device which successively comprises a light hydrocarbon reaction zone I, a heavy hydrocarbon reaction zone and a light hydrocarbon reaction zone II from bottom to top along the vertical direction of a lift pipe reactor. According to the invention, through arrangement of the hydrocarbon oil II circular atomizing chamber on the spray nozzle, the spray nozzle provided by the invention can simultaneously spray two raw materials, and can be used for the catalyticcracking lift pipe experimental device for experimental study of simultaneous contact and reaction of different catalytic raw materials with a catalyst; and light hydrocarbons sprayed by the hydrocarbon oil II spray head preferentially contact with the catalyst for a reaction to generate a large amount of carbonium ions, so conversion of heavy hydrocarbons is accelerated, and the spray nozzle provided by the invention has the characteristic of reducing the diesel-to-gasoline ratio of catalytic cracking.

Description

technical field [0001] The invention relates to a catalytic cracking conversion device for petroleum hydrocarbons, in particular to a catalytic cracking riser feed nozzle and its application. Background technique [0002] As the main light oil production process in the oil refining industry, catalytic cracking has attracted extensive attention from major research and development institutions at home and abroad because of its wide applicability and relatively low processing cost. Catalytic cracking provides 75% of gasoline components in my country's commercial gasoline pool, and plays a pivotal role in refineries. In the catalytic cracking process and catalyst research and development process, the catalytic cracking riser test device is used in the screening of catalytic cracking catalyst formula, the cracking performance of catalytic raw materials and the investigation of product properties, the evaluation of catalytic cracking catalyst, the optimization and simulation of in...

AI Technical Summary

Problems solved by technology

When the catalytic cracking riser test device simulates the blending of heavy diesel oil in industrial catalytic cracking units, because the existing feed nozzle can only spray out one kind of catalytic cracking raw material, it is impossible to simulate the contact and reaction of heavy diesel oil with the catalyst

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