Water softening apparatus
US4764280A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Feb 11, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A water softening apparatus and method for reducing odor in, and improving the taste of, problem water, including a pair of treatment tanks and a control valve assembly for determining which tank is on-line, and which tank is off-line, and for controlling the regeneration of the off-line tank. An exhausted tank is taken off-line and partially regenerated by communicating a regeneration solution from a reservoir to the tank and passing the solution through a resin compartment after which the solution is discharged to drain. After a predetermined quantity of regeneration solution is passed through the tank, the resin compartment is slowly rinsed using treated water from the on-line tank. Prior to fully rinsing the off-line tank, the fluid flow is terminated leaving a diluted regeneration solution in the off-line tank thereby keeping the off-line tank in a "high solids" condition. Just prior to placing the off-line tank, on-line, treated water from the on-line tank is communicated to the off-line tank and passed through the resin compartment at a flow rate higher than the fluid flow rate during the rinsing step such that the off-line tank is fully backwashed prior to being placed on-l…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.