Method and system for producing modified pitch and carbon black oil from coal tar

The invention relates to the technical field of coal tar distillation, and discloses a method for producing modified pitch and carbon black oil from coal tar, the method comprises the following steps: S1, feeding dehydrated tar into a distillation main tower for distillation; s2, when the output of the light oil fraction is stable, extracting anthracene oil from a side line; s3, when maltha is generated at the tower bottom of the main distillation tower, pumping out a part of materials at the tower bottom of the main distillation tower, and feeding the materials into a modification pretreatment tower for modifying asphalt; s4, in the reaction process of the material at the bottom of the distillation main tower in the modification pretreatment tower, extracting anthracene oil from the side line; s5, mixing the anthracene oil extracted in the step S4 and the other part of materials extracted from the bottom of the distillation main tower to generate carbon black oil; and S6, reacting the material at the bottom