The specific implementation process of trial production of 3#jet fuel by using 150 kt·a-1 diesel hydrofining unit in a refinery was introduced.By adjusting the distillation range of raw oil and operating parameters,a series of measures were taken to reduce the reaction temperature,reaction pressure and fractionator temperature,3#jet fuel was successfully produced by using the first line oil of atmospheric and vacuum distillation unit as raw material.It was found in practice that the 140～255℃ straight-run fraction was suitable for producing 3#jet fuel.The operating parameters were lower than those for diesel production,reducing the reaction pressure from 3500 kPa to 3200 kPa.The aromatic volume fraction of 3#jet fuel increased from 7.33％to 9.27％,meeting the internal control index requirement of more than 8.50％.The success of 3#jet fuel trial production proves that the diesel hydro-refining unit has the capability to switch between producing diesel and 3#jet fuel online,effectively enhancing the economic and social benefits of the unit,and providing a good industrial example for the product transformation of diesel hydro-refining units.
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