The invention discloses a hydrogenation modification method for coking
gasoline and diesel distillates. A coking
gasoline and diesel
raw material is mixed with heated
hydrogen and then introduced to pass through a low-temperature hydrorefining reactor and a hydrogenation modification reactor in sequence; a reaction
effluent is separated and modified, and obtained liquid is distilled to obtain gas,
gasoline,
kerosene and diesel. In the method disclosed by the invention, a process flow of mixing
hydrogen behind a furnace is adopted, the
heating furnace is only used for heating the
hydrogen, the mixed
raw material does not pass through the
heating furnace, and the temperature of the reactor is controlled based on the quantities of hot hydrogen and cold hydrogen. Compared with the prior art, the hydrogenation modification method disclosed by the invention has the
advantage of saving equipment investment and being flexible in production scheme, can be used for flexible production by adjusting
process conditions and production distribution according to the differences of
raw material properties and product schemes; by implementation of hydrogen mixing behind the furnace, the coking raw material can be effectively prevented from being coked at a furnace tube; and by arrangement of a low-temperature protective agent reactor, olefin saturation is performed at lower temperature so as to reduce coking, meanwhile,
coke powder is distributed at a protective agent
bed as uniform as possible, so that the long-term operation of a hydrogenation device is ensured.