Anti-blocking ammonia desulfurization system

The utility model belongs to the technical field of ammonia desulfurization, and particularly relates to an anti-blocking ammonia desulfurization system which comprises a desulfurization tower and a process water tank, a spraying assembly is arranged in the desulfurization tower, and the spraying assembly is arranged on a concentration layer of the desulfurization tower; and the spraying assembly is communicated with the process water tank. The bottom spraying device is additionally arranged at the bottom of the concentration layer to wash the bottom of the concentration layer, materials are prevented from depositing during discharging and blocking a discharging port, the flue port spraying device is additionally arranged at the flue port of the concentration layer, solid particles in high-temperature flue gas are prevented from depositing at the flue port, and the flue port is prevented from being blocked by smoke dust; in addition, condensate water of a factory circulating water system and fresh water of an