The invention relates to the technical field of chemical equipment, in particular to a special online density precision
detector for a full-automatic chlorination process. The device comprises an instrument
desk assembly installed on a reaction kettle, a
compressed air inlet
pipe used for air inlet is connected to the side of the instrument
desk assembly, an air inlet main valve and a pressure reducing valve are arranged on the
compressed air inlet
pipe, a rotor flow meter is arranged in the instrument
desk assembly, the bottom end of the instrument desk assembly is connected with an H air blowing
pipe and an L air blowing pipe, and the two air blowing pipes are both connected into the reaction kettle. The bottom end of the L-shaped air blowing pipe is higher than the bottom end of the H-shaped air blowing pipe, a
pressure difference transmitter is arranged on the top of the instrument desk assembly, and the L-shaped air blowing pipe and the H-shaped air blowing pipe are sleeved with sampling pipes. Through the arrangement of the sampling pipe, it is ensured that the measurement environment is stable, and the
measurement precision is ensured; the direct contact between an instrument and reaction liquid is directly avoided, indirect measurement is carried out by adopting
pressure difference, the service life of equipment is greatly prolonged, and the device is suitable for production of various highly corrosive materials.