Jet pipe working principle is: the high temperature flue gas passes through the preheater, the heat to the outer tube, cold air (or gas) through the cold box to the jet tube, and tube heat exchange surface from the jet hole high-speed vertical spray to coat, the impact of airflow, the air (gas) and laminar boundary layer turbulent surface between the outer tube, thus strengthening the convective heat transfer, improves the efficiency of the preheater.
Jet pipe main structure: the outer tube and the inner tube is arranged inside the shell, interval in the outer tube and the distance set tube, air chamber is formed between the inner wall of outer wall of the outer tube and shell, the outer tube is provided with jet holes, both ends of the outer tube opening partition with the cold air chamber is communicated with the air inlet and the air chamber, the air outlet, and the outer tube, both ends of a smoke inlet and a smoke outlet are respectively connected with the inner tube. Outside the shell without insulation, fireproof material, the heat exchange efficiency is high, the highest overall heat transfer coefficient of 100W/ (M2 ℃). In addition, but also has the flue gas side resistance is low, the inner tube wall temperature is low, the flue gas side is not easy fouling and easy cleaning, equipment using the advantages of long service life, after preheating, hot air temperature is higher, and more than 600 ℃, and can be widely used for recovery of waste heat of high temperature flue gas types.