Hydrocarbon oil two-phase hydrogenation method

The invention discloses a hydrocarbon oil two-phase hydrogenation method. According to the invention, a mixer is arranged on the top of a hydrogenation reactor, a cycle oil tube is arranged in the hydrogenation reactor, hydrogen is mixed with fresh raw oil and cycle oil in the mixer to form a mixture flow, the mixture flow contacts with a catalyst and is hydrogenated, parts of the resulting reaction effluent are used as the cycle oil, and the other parts of the reaction effluent are separated. The cycle oil is cycled in the hydrogenation reactor through the cycle oil tube, one end of the cycle oil tube is connected with the mixer, and the other end of the cycle oil tube is connected with the outlet of the hydrogenation reactor through a cycle oil pump. The method which allows the mixer and the cycle oil tube to be arranged in the hydrogenation reactor has the advantages of simple structure, substantial space saving, and investment reduction.