Heat transfer tube and cracking furnace using the same
AssigneesChina Petroleum & Chemical Corporation, Beijing Research Institute of Chemical Industry Sinopec
InventorsGuoqing Wang, Lijun Zhang, Xianfeng Zhou, Junjie Liu, Zhiguo Du, Yonggang Zhang, Zhaobin Zhang, Cong Zhou
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Abstract
A heat transfer tube includes a twisted baffle arranged in an inner wall of the tube. The twisted baffle extends spirally along an axial direction of the heat transfer tube. The twisted baffle is provided with a non-through gap extending along an axial direction of the heat transfer tube from an end to the other end of the twisted baffle. A cracking furnace uses the heat transfer tube. The heat transfer tube and cracking furnace have good heat transfer effects and small pressure loss.
Claims11
A cracking furnace having a radiant coil, characterized in that the radiant coil comprises 2 to 10 heat transfer tubes,
- wherein a plurality of the 2 to 10 heat transfer tubes are arranged in the radiant coil along an axial direction thereof in a manner of being spaced from each other, and
- wherein each of the heat transfer tubes comprises a twisted baffle arranged on an inner wall of said each of the heat transfer tubes, the twisted baffle extending spirally along an axial direction of the heat transfer tube and being provided with a non-through gap extending from one end to the other end of the twisted baffle along an axial direction of the heat transfer tube without penetrating the twisted baffle in the axial direction;
- wherein the non-through gap has a contour line of a smooth curve, the smooth curve comprises two identical curve segments, which are centrosymmetric with respect to a centerline of the heat transfer tube;
- wherein the contour line is unclosed U-shaped and the non-through gap is not enclosed on all sides by material.
Dependencies are inferred from the claim text.