Anhydrous mechanical seal for desulfurization slurry circulating pump

The utility model relates to the technical field of mechanical seals, in particular to an anhydrous mechanical seal for a desulfurization slurry circulating pump, which comprises a sealing shaft sleeve, a moving ring, a static ring, a push ring, a spring, a mechanical seal flange and a fixed ring which are sleeved on a pump shaft and are sequentially arranged from inside to outside, the sealing shaft sleeve comprises a sleeve body and a turnover part integrally formed at the end of the sleeve body, an annular cavity with the inner diameter larger than the outer diameter of the pump shaft is defined between the turnover part and the sleeve body, and the annular cavity is used for being coaxially inserted into a shaft sleeve locking fastener. A movable ring O-shaped ring is arranged between the movable ring and the turnover part, one axial end of the static ring abuts against the push ring, the other axial end of the static ring abuts against the movable ring, and the spring is installed in the mechanical seal