Solid-liquid separation device

A solid-liquid separation device that performs a cleaning process of an activated carbon, the solid-liquid separation device comprising:

• a first heat exchanger that is configured to:
• store organic matter, water and a substance A that is capable of dissolving water and oil, wherein substance A is stored at a first liquid level that is above in a vertical direction a first flow path of a substance B into the first heat exchanger, and
• evaporate a portion of the substance A stored in the first heat exchanger to form an evaporated substance A by exchanging a heat of condensation of a substance B and a heat of evaporation of the substance A;
• a second heat exchanger that has a center of mass that is higher in the vertical direction than a center of mass of the first heat exchanger, wherein the second heat exchanger is configured to:
• receive the evaporated substance A from the first heat exchanger,
• condense the evaporated substance A to form a condensed substance A by exchanging a heat of evaporation of the substance B and a heat of condensation of the substance A, and
• store the condensed substance A at a second liquid level that is below in the vertical direction a second flow path of the substance B into the second heat exchanger;
• a treatment tank that is configured to:
• receive a portion of the condensed substance A from the second heat exchanger,
• mix the condensed substance A with the activated carbon to form a mixture of the organic matter, the water and the substance A, and
• flow the organic matter, the water and the substance A to the first exchanger;
• and
• a liquid level sensor that is configured to:
• measure a level of the water in the first heat exchanger, and
• determine a completion of the cleaning process of the activated carbon based on the level of the water measured in the first heat exchanger;
• wherein the first heat exchanger and the second heat exchanger are positioned to overlap so that the first liquid level and the second liquid level tend to equalize in the vertical direction with respect to a common reference point when the cleaning process of the activated carbon is performed.