Pressure relief device of barite ash tank

The utility model provides a pressure relief device of a barite ash tank, which comprises a pressure relief pipeline, a circulating tank, a circulating pipeline, a weighting pump and a weighting funnel, and the weighting pump is connected with the circulating tank through the circulating pipeline and can circularly pump mud in the circulating tank; the weighting funnel is arranged on the circulating pipeline and can add a weighting agent into the circulating slurry, and the weighting funnel can generate negative pressure suction force during slurry circulation; and one end of the pressure relief pipeline is connected with an emptying port of the ash tank, and the other end of the pressure relief pipeline is connected with the feeding funnel, so that barite dust generated by pressure reliefof the ash tank is added into circulating slurry. The barite crusher has the advantages of being capable of preventing dust from leaking into air to cause environmental pollution and personnel injury, utilizing barite powder