Pellet ring cooler air system

The invention relates to a pellet ring cooler air system which comprises a ring cooler, a ring cooler upper cover, ring cooler air boxes, cooling fans, pipelines and valves. The pellet ring cooler air system is characterized in that air inlets of the cooling fan I, the cooling fan II and the cooling fan III are connected with ambient air through the three-way pipelines and the cold air regulating valves; one or more air inlets which communicate with the ambient air are formed in an upper cover of the fourth cooling section of the ring cooler; the ring cooler air box IV communicates with an air inlet of the cooling fan IV through the hot air regulating valve I; and an air outlet of the cooling fan IV communicates with the three-way pipelines at the inlets of the cooling fan I, the cooling fan II and the cooling fan III through the hot air regulating valves II. The pellet ring cooler air system has the advantages that airflow in the rear section of cooling penetrates through a material layer in the direction fr