Drying denitration method in carbon black production and carbon black production system

The invention discloses a drying denitration method in carbon black production and a carbon black production system, and solves the technical problem of efficient and reasonable denitration of dried flue gas in the carbon black production, and the method is carried out after carbon black powder is collected by a main bag filter and granulated and molded by a granulator. The method comprises the following steps: a, directly feeding waste heat tail gas of a granulator into a drying machine to be subjected to negative-pressure drying, b, carrying out condensation dehydration treatment on the dried tail gas to remove water vapor, c, feeding the tail gas with the water vapor removed into a combustion furnace to be heated, and d, feeding into a denitration reactor for denitration treatment. Thenegative-pressure drying device has the beneficial effects that only the vacuumizing device is additionally arranged in the drying device to achieve structural change of negative-pressure drying, other devices are all existin