Method for producing gasoline blended component with high octane number from refinery gas and light hydrocarbons

Abstract

The invention relates to a method and device for producing a gasoline blended component with high octane number from refinery gas and light hydrocarbons, belonging to the technical field of aromatization of light hydrocarbons. The device comprises heating furnaces, reactors and an absorption-desorption tower which are serially connected, and is characterized in that: (1) two groups of the heating furnaces and the reactors that are parallelly connected are used for cycle operation; (2) in the reactor, the process conditions are as follows: the reaction temperature is 320-420 DEG C, the pressure is 0.8-2.0 MPa, the mass space velocity of 0.4-0.8 h<-1>, and the mass ratio of light hydrocarbon component to low-octane number gasoline is (30:70)-(10:90); (3) the light hydrocarbon component in the reactor is one of catalysis dry gas, coking dry gas and catalytic coking liquefied gas or a mixture thereof; and the low-octane number gasoline is one of ordinary / reduced pressure straight-run gasoline, field condensate oil, hydrogenated naphtha and cracked gasoline or any combination thereof; and (4) a stabilizer column and a heavy component eliminating tower are serially connected on the rear side of the absorption-desorption tower. The method and the device provided by the invention adopt two groups of the heating furnaces and the reactors that are parallelly connected for cycle operation, so as to realize continuous operation of reaction regeneration. In addition, the method and the device have strong adaptability and low energy consumption, and can directly remove part of the heavy components in the gasoline component so as to reduce the dry point of the gasoline product. During regeneration, the suction pressure regeneration combined process is used, so as to greatly shorten the coking time.

Description

technical field [0001] The invention belongs to the technical field of aromatization of light hydrocarbons, in particular to a fixed-bed mixed raw material consisting of refinery gas, reformed tops, condensate, hydrogenated coker naphtha, and straight-run naphtha. A method for producing high-octane gasoline blending components by contacting with a reforming catalyst on a reactor for reforming reaction. Background technique [0002] With the introduction of new standards for unleaded gasoline and gasoline in my country, the country has stricter and stricter quality requirements for finished gasoline, and lower and lower requirements for sulfur content, metal content, and olefin content in gasoline. The traditional method to reduce the sulfur content and olefin content in gasoline is nothing more than gasoline selective hydrogenation and reforming equipment, etc., but the production cost is high and the process is complicated, which is not conducive to large-scale promotion. ...

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Problems solved by technology

However, the reaction product contains more heavy fractions, and the high dry point needs to be cut; the reaction pressure is low, the reaction depth is not enough, and the processing volume is small; the reactor setting is unreasonable, and the reactor bed temperature is not suitable for control; Steam is used as the heat source of pressure and tower bottom reboilers, the system flow is unreasonable, the equipment investment is large, and the processing cost is high; the raw material source of straight-run gasoline is limited, and it is not easy to meet the needs of refinery gasoline for olefin reduction

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