| 摘要 |
<p>PURPOSE:To enable stable evaporation of liquefied gas in a cold district by vaporizing liquefied gas with a heat exchanger of an evaporation process, further increasing the temperature of the gas and circulating the gas in a heat-exchanger of a thawing process, so that the surface frost is thawed and removed from the inside. CONSTITUTION:In the case where it is difficult to thaw in a usual circuit, gas evaporated by a heat exchanger 6A is introduced through a pipe 7 and a valve 10A to a heater 12. The warmed gas is passed through a pipe 13 and a valve 14B to reach a heat exchanger 6B of a thawing process, and frost on the heat- exchanger 6B surface is thawed and removed. When the heat-exchanger is switched and the heat exchanger goes into a thawing process, liquefied gas is vaporized by the heat-exchanger 6B, and then fed through a pipe 7B and a vlave 10B to the heater 12 to be heated. The warmed gas flows through the pipe 13 and a valve 14A in the heat-exchanger 6A for thawing.</p> |
