| 发明名称 |
Furnace coil with protuberances on the external surface |
| 摘要 |
The efficiency of heat transfer to a furnace tube or coil in a furnace for cracking ethane, propane or naphtha feedstocks, or a mixture thereof may be improved by providing protuberances on the surface of the tube or coil having i) a maximum height from 3 to 15% of the coil outer diameter, ii) a contact surface with a coil, or a base, which area is 0.1%-10% of the coil external cross section area, and iii) a geometrical shape which has a relatively large external surface containing a relatively small volume. |
| 申请公布号 |
US8790602(B2) |
申请公布日期 |
2014.07.29 |
| 申请号 |
US201213432192 |
申请日期 |
2012.03.28 |
| 申请人 |
Nova Chemicals (International) S. A. |
发明人 |
Petela Grazyna;Benum Leslie Wilfred |
| 分类号 |
B01J19/00;C07C4/02;C10G9/20;B01J19/24;B01J19/02 |
主分类号 |
B01J19/00 |
| 代理机构 |
|
代理人 |
Johnson Kenneth H |
| 主权项 |
1. In a furnace for thermally cracking a feed selected from the group consisting of C2-4 alkanes, and naphtha, the improvement comprising using in the furnace radiant section one or more process coils comprising one or more passes, having the external surface augmented with protuberances, the said protuberances having:
i) a maximum height from 3 to 15% of the coil outer diameter; ii) a contact surface with a coil, or a base, which area is 0.1%-10% of the coil external cross section area; iii) a geometrical shape which has a relatively large external surface containing a relatively small volume. |
| 地址 |
Fribourg CH |
