| 摘要 |
<p>Disclosed is a natural gas fractional distillation apparatus. The natural gas fractional distillation apparatus according to one embodiment of the present invention comprises: a gas-liquid separator into which condensed natural gas flows and which separates the condensed natural gas into a vapor stream and a liquid stream; a gas separator which separates the vapor stream separated in the gas-liquid separator into a first vapor stream and a second vapor stream; a first heat exchanger which condenses the first vapor stream separated in the gas separator; a first expander which expands the first vapor stream condensed in the first heat exchanger; a second expander which expands the second vapor stream separated in the gas separator; and a distillation tower into which the liquid stream separated in the gas-liquid separator, the first vapor stream expanded in the first expander, and the second vapor stream expanded in the second expander flow in order to be divided into an overhead vapor stream containing methane and a component-reinforced lower stream that is heavier than methane. The first heat exchanger is capable of exchanging heat between the first vapor stream separated in the gas separator and the first vapor stream and the overhead vapor stream expanded in the first expander.</p> |
