To provide an air heating-type liquefied gas vaporizer capable of unifying the split-flow of the liquefied gas from a lower manifold tube to finned tubes.
An evaporating part of the air heating-type liquefied gas vaporizer comprises an evaporating unit 2 configurated by a pair of manifold tubes mounted in parallel with each other at a vertical interval, and a plurality of finned tubes 8 mounted between the both manifold tubes 7 at a lateral interval, and connected to both manifold tubes 7 at its upper and lower both end parts. A liquefied gas inlet 9 is formed on a lower part of a peripheral wall 7a at a central part of the lower manifold tube 7. A partition wall 15 is mounted in the lower manifold tube 7 for vertically partitioning the inside of the lower manifold tube 7. A plurality of through holes 16A, 16B for unifying the split-flow of the liquefied gas to all of the fined tubes 8 are formed on the partition wall 15 at longitudinal intervals. Sizes of the through holes 16A, 16B for unifying the split-flow are determined in such manner that the size of the through hole is reduced toward the liquefied gas inlet 9 and is enlarged in accordance with the separation from the liquefied gas inlet 9.
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Akira Watanabe
Norihiko Hibi
Kiyosue Yasuko