| 摘要 |
PROBLEM TO BE SOLVED: To smoothly prepare a desired salt soln. stably each time by providing the apparatus with a barrier which is arranged with common salt atop this barrier and allows the permeation of water and a means for opening a water surface to the atm. which opens the water surface of a water level above this barrier to the atmosphere at all times at this water level. SOLUTION: A salt soln. prepn. apparatus 1 is provided with a barrier 3 which vertically constitutes the space in a water storage tank 2 in the position at a relatively upper level in this water storage tank 2. The barrier 3 is formed of a plate body consisting of a water permeable perforated plate or wire net and the common salt 4 is arranged atop the barrier 3. The portion above the barrier 3 in a height direction is provided with a means 12 for opening the water surface to the atmosphere which opens the water surface of the water level above the barrier 3 to the atm. at all times at this water level. The means 12 for opening the water surface to the atm. comprises a cylindrical member disposed around a water collecting cylinder 5. This cylindrical member is placed on the barrier 3 in the state of directing the member upward and opening the same to the atm. As a result, the desired salt soln. may be smoothly prepd. stably each time. |
