专利详情

专利名称	Heat exchanger tube, a method for making the same, and a cracking furnace or other tubular heat furnaces using the heat exchanger tube
申请号	US20010963014	专利类型	US
公开（公告）号	US6530422	公开（授权）日	2003.03.11
申请（专利权）人	中国科学院金属研究所	发明（设计）人	XU SHIQUN (CN); ZENG QINGQUAN (CN); ZHENG ZHI (CN); ZHU YAOXIAO (CN); BAI QINGJU (CN); LANGHONG LOU (CN); WANG GUOQING (CN); XIUZHEN NING (CN)
主分类号	F28F13/12	IPC主分类号	F28F13/12
专利有效期	Heat exchanger tube, a method for making the same, and a cracking furnace or other tubular heat furnaces using the heat exchanger tube 至Heat exchanger tube, a method for making the same, and a cracking furnace or other tubular heat furnaces using the heat exchanger tube	法律状态
说明书摘要	A heat exchanger tube, having at least one twisted baffle therein, each of said twisted baffles extends in the inside of the heat exchanger tube along the axis thereof, said twisted baffles extends as long as at least a part of the entire length of said heat exchanger tube, and said twisted baffles are integrated with the inner surface of said heat exchanger tube. The twisted angle of said twisted baffles is between 100 to 360 . The ratio between the axial length of said heat exchanger tube with the twisted angle 180 of said twisted baffles and the internal diameter of said heat exchanger tube is 2 to 3. The thickness of said twisted baffles is approximated to that of said heat exchanger tube; in every cross section of said heat exchanger tube, the transition zone from the surface of said twisted baffles to the surface of said heat exchanger tube, and vice versa, is in the shape of a concave circular arc. The present invention also relates to a cracking furnace tube, which uses at least one said heat exchanger tube according to the present invention, any two of said heat exchanger tubes are separated from each other in at least one section of the radiation heating furnace tube, the distance between the two adjacent said heat exchanger tubes is at least 5 pitches