Heat are recycled by a lot of suction holes arranged on the side of whole cooling section, hot gas are sucked through the holes, branch pipes, valves, and general pipes and then sent to dryer by suction fan.

• 抽热吸口，设于冷却带，热风从不同的抽风口经由支管、门和热风总管,由锅炉引风机抽出送入干燥，使之余热利用。