| 摘要 |
1,010,923. Ion-exchange. PERMUTIT COMPANY Ltd. Nov. 6, 1963 [Nov. 16, 1962], No. 43458/62. Heading B1J. An ion-exchange apparatus comprises a cylindrical vessel 1 housing a charge of baseexchange resin, an inlet 2 leading to an internal tube 3 through which raw water from a pipe 4 is introduced to be softened by upward flow through the resin, and an outlet 5 leading to a pipe 6 for the softened water. When the resin is to be regenerated a constant volume of brine is introduced through the pipe 6 to flow downwardly through the resin, and the spent brine regenerant flows up the tube 3 to the pipe 4 by the use of the valve chamber 13. This chamber has upper and lower valve seats 47 and 48 concentric with the ends of the cylinder, and it contains a ball 49 that is of specific gravity slightly less than that of brine. Below the lower seat 48 there is a port 50 to which the pipe is connected, and above the upper seat 47 there is a cylindrical space 51 in the side of which there is a port 52 connected to the pipe 15 and at the end of which there is a bleed opening 53. When suction is applied to the pipe 18 a small amount of liquid is drawn through the opening 53, but the major flow is through the pipe 15 and port 52. Since the liquid above the opening 53 may well not be a saturated solution, in contrast to that at the bottom of the container which will always be a saturated solution as long as there is solid salt in the container, it is important that the bleed opening 53 should be small. A strainer 54 is mounted above the opening 53 to prevent solid particles fouling it, and the strainer is in turn placed immediately below the outlet of the pipe 27. In operation, regeneration is initiated by opening the solenoid valve 38, which may be done under automatic control. Brine is then slowly drawn up to the top of the chamber 13 and flows downwards through it. The ball 49 floats in the brine in the chamber but is readily forced off the upper seat 47 to allow the brine to flow. The level of brine falls from the level X-X until it reaches the opening 53. Air is then drawn into the chamber 13, the level of brine falls in it, and the ball 49 becomes seated on the lower seat 48. No more brine flows from the container 10, but suction is maintained while the base-exchange resin is washed with water flowing through the inductor 14. Specification 1,010,924 is referred to. |
