Self-circulation flushing system of seawater circulating pump shaft seal

The invention discloses a self-circulation flushing system of a seawater circulating pump shaft seal. The self-circulation flushing system of the seawater circulating pump shaft seal comprises an externally connected flushing pipeline, a shaft seal flushing pipeline and a waste liquid circulation pipeline. The externally connected flushing pipeline comprises externally connected flushing equipment connected with a sealed water tank; a liquid level indicator is arranged in a flushing water tank; the shaft seal flushing pipeline comprises at least one booster pump group which is connected with a flushing water inlet of the shaft seal through a check valve; a filter is arranged at a flushing water inlet of each booster pump group, and the other end of each filter is connected with the sealed water tank; the waste liquid circulation pipeline comprises a waste liquid pipeline connected with a waste liquid outlet of a shaft sleeve; a flow indicator is arranged on the waste liquid pipeline, and the other end of the