48results about How to "Avoid local hotspots" patented technology

The invention discloses a heavy oil hydrogenation reactor and a hydrogenation method. The reactor comprises a reactor outer cylinder, an inner cylinder I and an inner cylinder II, the inner cylinder I and the inner cylinder II are arranged in the axial direction of the reactor, the cross sectional area of the inner cylinder I is gradually reduced from top to bottom, and the cross sectional area of the inner cylinder II is gradually increased from top to bottom; an annular space is formed among the inner cylinder I, the inner cylinder II and the reactor outer cylinder body; wherein the inner cylinder I is filled with a hydrogenation catalyst I, the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II. The viscosity of the material is reduced through the viscosity reduction assembly arranged in the inner cylinder II, and then the material sequentially passes through the inner cylinder I and the annular space to generate hydrogenation reaction, so that the mass transfer process driving force and reaction rate of heavy oil liquid phase hydrogenation reaction are improved, the contact time of the reaction material and different active catalysts is controlled, and catalyst surface coking is slowed down; the deep cracking reaction of the light oil is reduced, and the liquid yield and the heavy impurity removal conversion rate in the heavy oil liquid phase hydrogenation reaction process are improved.