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

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, 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 oi