| 发明名称 |
PINNED FURNACE TUBES |
| 摘要 |
Furnace tubes for cracking hydrocarbons that in an embodiment have a longitudinal array of pins having i) a maximum height from about 2 to about 4.8 cm; ii) a contact surface with the tube, having an area from about 0.1% to about 10% of the tube external cross section area iii) a uniform cross section along the length of the pin. (i.e., they are typically not tapered); and iv) a length to diameter ratio from about 4:1 to about 2:1 have an improved heat transfer over bare fins and reduced stress relative to a fined tube. |
| 申请公布号 |
US2014374213(A1) |
申请公布日期 |
2014.12.25 |
| 申请号 |
US201414278379 |
申请日期 |
2014.05.15 |
| 申请人 |
NOVA Chemicals (International) S.A. |
发明人 |
Crowe Jeffrey Stephen;Taylor Mark Andrew |
| 分类号 |
C10G9/20 |
主分类号 |
C10G9/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A tube for use in the radiant section of a furnace for cracking hydrocarbons to produce olefins having on its exterior surface a series of pins in one or more linear arrays parallel to the longitudinal axis of the tube, said pins having:
i) a maximum height from about 2 to about 4.8 cm; ii) a contact surface with the tube, having an area from about 0.1% to about 10% of the coil external cross section area; iii) length to diameter ratio from about 4:1 to about 2:1. |
| 地址 |
Fribourg CH |
