Denitrogenation hydrogenation method for secondary processing diesel oil

The invention relates to a denitrogenation hydrogenation method for secondary processing diesel oil, which is characterized in that coker diesel oil or catalyzed diesel oil raw materials can be performed heat exchange in a heat exchanger to the temperature of 25-150 DEG C, mixed with a nitrogen removal agent in a static state mixer and then enters in a settlement pot for depositing and separating slag, sediment is discharged from the bottom of the settlement pot, nitrogen removal oil is passed through an electric settlement pot, the sediment is discharged from the bottom, upper layer refining oil is refined through an adsorption filter, the refined oil is performed heat exchange in the heat exchanger to the temperature of 200-350 DEG C and enters in a hydrogenation system for hydrofinishing treatment, wherein the hydrogenation partial pressure is 5.0-9.0 MPa, space velocity is 0.5-2h, the addition weight of the nitrogen removal agent accounts for 0.2%-5% of coker diesel oil weight, the adsorption filterin