| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of heating an inputted material by efficiently causing natural convection in a vessel. SOLUTION: The inside of the vessel 2 is so constituted in a closed loop that a heating medium 7 vertically circulates. A heating gas passage 5 comprises a lower heating section 21 for heating the heating medium 7 in a lower reservoir section 11, and a side heating section 22 for heating the heating medium 7 in a first side section 12 heated in the lower reservoir section 11. The material 1 is heated in the first side section 12 and introduced into the heating medium 7 flowing through a second side section 13 toward the lower reservoir section 11 and accelerates circulation of the heating medium 7. In the heat exchanger tube 14a, the material 1 boils to generate a circulation driving force of the heating medium 7. COPYRIGHT: (C)2007,JPO&INPIT
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