| 摘要 |
<p>Container (3) open at the top, in which are arranged a number of steel plates (8, 8') having a highly-polished surface. A finely-meshed sieve (4) divides the container (3) into two regions. Opening into one region is an inlet pipe (1) for the water which is to be softened. Leading from the other region is a siphon (5) through which the softened water is supplied to the user. The plates (8, 8') which are electrically isolated can each be connected alternately with the pole of a d.c. power supply. The water is softened by flowing through the plates (8, 8'), which form a series of galvanic elements. As a result, layered deposits (10) which consist essentially of lime form on those plates (8 or 8') which are connected to the positive pole of the d.c. supply. When the voltage applied is reversed, the deposits (10) break up and crumble. The deposits which collect on the floor of the container (3) are removed by opening a clarification valve (11).</p> |
