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US 3,964,873 AGranted
Heating device having dumbbell-shaped reaction tubes therein
AssigneesMitsubishi Jukogyo Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd.
InventorsSeigo Aramaki, Katsuzo Sudo, Mitsuo Tani, Takehiko Sato, Yuuji Onishi, Nobuhiro Sakaguchi
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Abstract
A heater tube for use in a fluid heating device, which is used, for example, as a thermal decomposing device of hydrocarbons. The heater tube has a dumbbell shape in cross section.
Claims1
In a furnace for the thermal decomposition of hydrocarbons comprising a chamber having heating means positioned at opposite locations therein, and at least one elongate reaction tube spaced between said heating means;
- the improvement which comprises said reaction tube having a cross sectional dumbbell-shape and having in cross section perpendicular to the longitudinal axis of said tube a major and minor diameter of the following interrelated characteristics:
- 0.degree. <
- .PSI. <
- 60.degree.
- 10 mm <
- a <
- 60 mm
- 5 mm <
- b <
- 2000 mm
- where
- a = the radius of curvature of the inside surface of the reaction tube at the circular portions of said dumbbell-shape,
- b = radius of curvature of the inside surface of the reaction tube at the narrow portion of said dumbbell-shape and,
- .PSI. = the angle between a line connecting the center of curvature at the narrow portion and the center of curvature at the circular portion and a line extending from said center of curvature at the narrow portion through the center of the narrow part
- and wherein the major diameter of the dumbbell-shaped reaction tube is parallel to each of said heating means.
12 more elements
Dependencies are inferred from the claim text.