Separation device

A separation device, comprising:

• a gas-liquid contact flow passage having a distillate discharge port formed on one end side and a bottom product discharge port formed on another end side;
• a raw material liquid introduction port formed between the distillate discharge port and the bottom product discharge port in the gas-liquid contact flow passage;
• a stripping section, which is provided between the raw material liquid introduction port and the bottom product discharge port and is configured to heat a liquid in the gas-liquid contact flow passage;
• a rectification section, which is provided between the raw material liquid introduction port and the distillate discharge port and is configured to cool a gas in the gas-liquid contact flow passage;
• and
• a meandering flow passage forming portion, which is arranged in the gas-liquid contact flow passage and forms a meandering flow passage configured to cause a flow of the gas to meander;
• wherein
• a bottom surface of the gas-liquid contact how passage is inclined vertically downward from the distillate discharge port to the bottom product discharge port.