Container for concentration, concentration equipment, and concentration method

Concentration equipment configured to concentrate a solution, the concentration equipment comprising:

• a container in which the solution is contained, the container including a supplying region in which a swirling flow of a gas is supplied to the solution, and an avoidance region that is situated below the supplying region when the container is installed on the concentration equipment and in which supplying of the swirling flow to the solution is avoided;
• a cock configured to close an upper opening of the container;
• a groove formed in a side surface of the cock in a spiral shape, and configured to introduce the gas into the container;
• and
• an ejection unit configured to eject a solvent, which is vaporized from the solution by effects of the swirling flow, from inside the container, wherein
• the supplying region is formed such that the swirling flow is supplied from an upper portion of the container for concentration,
• the avoidance region includes a narrow tube that is continuous with a lower end portion of the supplying region and that has a diameter smaller than a diameter of the supplying region,
• a position of an upper end opening of the narrow tube is offset from a central axis of the supplying region, and
• the narrow tube is formed such that a lower end portion of the narrow tube is disposed on the central axis of the supplying region and a direction in which the narrow tube extends is inclined with respect to an upward or downward direction.

A concentration method for concentrating a solution using a container in which the solution is contained, the container including a supplying region in which a swirling flow of a gas is supplied to the solution, and an avoidance region that is situated below the supplying region and in which supplying of the swirling flow to the solution is avoided, wherein

• the supplying region is formed such that the swirling flow is supplied from an upper portion of the container for concentration,
• the avoidance region includes a narrow tube that is continuous with a lower end portion of the supplying region and that has a diameter smaller than a diameter of the supplying region,
• a position of an upper end opening of the narrow tube is offset from a central axis of the supplying region, and
• the narrow tube is formed such that a lower end portion of the narrow tube is disposed on the central axis of the supplying region and a direction in which the narrow tube extends is inclined with respect to an upward or downward direction, the concentration method comprising:
• injecting the solution into the container up to a height that is within in the supplying region;
• concentrating including supplying the swirling flow of the gas, which is introduced from outside the container into the container by ejecting the gas present inside the container, to the solution in the container, the concentrating also including ejecting a solvent, which is vaporized from the solution by effects of the swirling flow, from inside the container together with the gas;
• stopping the ejecting of the gas in response to sensing that the solution is reduced to a predetermined quantity;
• and
• extracting the solution concentrated in the container from the container.