Sulfur blockage preventing system based on wet redox desulfurization process

The invention discloses a sulfur blockage preventing system based on a wet redox desulfurization process. The sulfur blockage preventing system comprises a separator, an absorption tower, a flash tank, a regeneration tower, a circulating pump, an air blower, a centrifuge, a barren liquor tank and a sulphur foam trough. The separator is connected with a gas inlet of the absorption tower, a rich liquor outlet of the absorption tower is connected with a feeding port of the flash tank, and a discharging port of the flash tank is connected with a feeding port of the regeneration tower; a barren liquor outlet of the regeneration tower is connected with the barren liquor tank, and the barren liquor tank is connected with a barren liquor inlet of the absorption tower through a first pipeline; the top of the regeneration tower is communicated with an inlet of the sulphur foam trough, and an outlet of the sulphur foam trough is communicated with a feeding port of the centrifuge; a washing liquid inlet is formed in the