PURPOSE: To remove any deterioration in heat transfer performance and stabilize a carbureted gas temperate in a heat transfer outlet as well as to reduce the extent of adfreezing on the outer surface of a heat transfer pipe by setting a heat exchanger, being set up in the point midway in a condensed water return pipe, down to a noncondensing gas removing part where noncondensing gas is concentrated.
CONSTITUTION: Combustion heat in a burner 11 heats water 2 via a burner pipe 12, this water 2 boils under decompression into steam, and it is conducted into a condensing chamber 20 through a steam pipe 21, thus a liquefied natural gas fluid in a heat transfer bundle 24 raises its temperature by condensed heat transfer of the steam. In addition, the steam heat-exchanges with the cold liquefied natural gas fluid, turning to a condensate, and it returns to a boiler part 10 by way of a condensate return pipe 22. At this time, the steam containing noncondensing gas comes into contact with the heat transfer bundle 24 from the steam pipe 21, but a noncondensing gas removing part 23 consisting of the heat exchange is set up in the midway of a condensate return pipe 22, through which the noncondensing gas is able to be concentrated on the said part 23, thus the noncondensing gas is in no case stayed in a portion of the heat transfer pipe bundle 24 where heat exchange takes place mainly.
SETA AKIO
TSUI NOBUHIKO
KUJIRAI KANJI
SATO YOJI
SHOTANI HITONOBU
SAWARA KAZUYA
IKEDA SEIDO
SUMITOMO PRECISION PROD CO