|発明の名称||HELICAL HEAT EXCHANGER HAVING INTERMEDIATE THERMAL MEDIUM|
PROBLEM TO BE SOLVED: To provide a heat exchanger having an intermediate thermal medium capable of making possibility of a high temperature thermal medium (sodium) and a low temperature thermal medium (water) to make contact with each other extremely smaller than a conventional heat exchanger filled with an intermediate thermal medium between an outer pipe and an inner pipe constituting a heat exchanger tube by making the outer pipe and the inner pipe in a duplex tube structure, and capable of reducing manufacturing cost as its structure is simple in comparison with the duplex tube structure.
SOLUTION: A plurality of cylindrical bulkhead pipes 6 having annulus spaces inside and both end parts of which are closed by pipe walls 6a, 6b are concentrically arranged with intervals between each other in a drum of the heat exchanger, respectively the helical coil type heat exchanger tubes 7 are arranged in the annulus spaces of the cylindrical bulkhead pipes, the high temperature thermal catalyst (X) is made to circulate in the heat exchanger drum through clearances (S) of a plurality of the cylindrical bulkhead pipes, the low temperature thermal medium (Y) is made to circulate inside of each of the helical coil type heat exchanger tubes, the intermediate thermal medium (Z) chemically inactive against both of the low temperature thermal medium and the low temperature thermal medium and excellent in heat exchanging performance is made to circulate inside each of the cylindrical bulkhead pipes.
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