Low-nitrogen combustion device of carbon black reacting furnace

The utility model provides a carbon black reacting furnace low-nitrogen combustion device which comprises an outer cavity, an outer layer venturi tube and an inner layer venturi tube which are coaxially distributed from outside to inside, an inlet of the outer cavity is an oxidizing agent inlet, an inlet of the outer layer venturi tube is a carbon black tail gas inlet, and an inlet of the inner layer venturi tube is a fuel hydrocarbon inlet. A plurality of tube wall holes are formed in the tube walls of the outer-layer venturi tube and the inner-layer venturi tube; and the holes in the tube wall of the same venturi tube are distributed on the same circumference at equal intervals. After the low-nitrogen combustor is used, the nitrogen oxide of the carbon black tail gas is synchronously reduced due to the fact that the nitrogen oxide of the smoke in the combustion chamber is reduced; after the content of nitric oxide in the carbon black tail gas is reduced, when the tail gas is used as fuel in a tail gas incin