Furnace-kettle-type modified pitch production system

The utility model discloses a furnace-kettle-type modified pitch production system. A pitch storage tank, a raw material pump, a pipe-type heating furnace, a flash tower, a reaction kettle A, a reaction kettle B and a reaction kettle C are connected in series; the reaction kettle C, a modified pitch intermediate tank and a modified pitch pump are connected in series and form circulation; and the modified pitch intermediate tank is respectively communicated with a modified pitch finished product tank and the pitch storage tank through the modified pitch pump. According to the utility model, the outlet temperature of the pipe-type heating furnace and the temperature of each reaction kettle can be modified flexibly, and toluene insolubles (TI) and quinoline insolubles (QI) of pitch are adjusted; the produced modified pitch TI and Qi value is not influenced by the TI and QI value of the raw material coal tar, and the adjustability and controllability of the modified pitch TI and QI value are realized; and the dev