Novel dirty nitrogen pre -heater of air

The utility model discloses a novel dirty nitrogen pre -heater of air, including outer tube, tubule, extra heavy pipe, intake pipe, outlet duct, extra heavy pipe, tubule interval distribution install in the outer tube, surface mounting has the intake pipe on the outer tube, surface mounting has the outlet duct under the outer tube. The utility model provides a novel dirty nitrogen pre -heater of air, this pre -heater can effectually preheat defiling nitrogen, and then has guaranteed the efficiency of air separation device when system oxygen, has reduced the system oxygen time. 本实用新型公开了种新型空气污氮预热器，包括外管、细管、粗管、进气管、出气管；所述粗管、细管间隔分布安装在外管内；所述外管上表面安装有进气管；所述外管下表面安装有出气管。本实用新型提供种新型空气污氮预热器，此预热器可有效的对污氮进行预热，进而保证了空分设备在制氧时的效率，减少了制氧时间。