摘要 |
PROBLEM TO BE SOLVED: To restrain a polymer from being generated on a surface of an upper tube plate and in an inside of a heat-exchanger tube, to eliminate damage of a heat exchanger, and to allow continuous operation for a long period, while securing sufficient strength in a joining part of the heat-exchanger tube and the upper tube plate. SOLUTION: This shell and tube heat-exchanger 30 is a vertical type shell and tube heat-exchanger for handling a process fluid containing an easily polymerizable substance as an in-tube fluid, and is provided with: a drum body 13 provided with flow-in and -out ports 11, 12 of the fluid; a plurality of heat- exchanger tubes 14 arranged in the drum body 13 to be extended vertically; and the upper tube plate 15 arranged in the vicinity of an upper end part of the drum body 13 to support the vicinity of an upper end 21 of the each heat- exchanger tube 14. In the heat-exchanger 30, some of the heat-exchanger tubes 14 are the heat-exchanger tubes 14a of which the tipper end 21 is not projected from the upper tube plate 15, and the others are the heat-exchanger tubes 14b of which the upper end 21 is projected from the upper tube plate 15. COPYRIGHT: (C)2003,JPO
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