Vaporizer for low temperature liquid

摘要

PCT No. PCT/JP95/01420 Sec. 371 Date May 24, 1996 Sec. 102(e) Date May 24, 1996 PCT Filed Jul. 17, 1995 PCT Pub. No. WO96/02803 PCT Pub. Date Feb. 1, 1996A lower header 10 into which low temperature liquid is flowed and an upper header 16 are connected with each other via a plurality of outer heat exchange tubes 22. A plurality of inner heat exchange tube 24 are respectively provided in the corresponding outer heat exchange tubes 22 at a region of an inflow end portion of each outer heat exchange tube 22. An annular passage 23 is defined between an inside surface of each outer heat exchange tube 22 and an outside surface of each inner heat exchange tube 24 for flowing low temperature liquid. Each annular passage 23 is communicated with the lower header 10.