The single cylinder cooler is one of the important equipment in the rotary kiln system. The clinker (1000-1200 ℃) coming out of the rotary kiln is driven by the rotation of the cylinder to fully exchange heat with the material and air, cooling the material to below 200 ℃, while improving the quality and grindability of the clinker. All the air after cooling the material is sent into the kiln as secondary circulating air, which improves the thermal efficiency of the kiln. The single tube cooling machine produced by Jiangsu Pengfei Group has a compact, reasonable, and simple structure, high thermal efficiency, low maintenance costs, low total equipment investment, and high operating efficiency.