Chlorination and dechlorination method
US5405540A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1994 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Apr 15, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/185
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chlorination and dechlorination apparatus and method for the treatment of wastewater or other fluid comprising a chlorinator, a contact tank, and a dechlorinator. The contact tank is a vessel having an inlet opening and an outlet opening and is divided into two contact chambers by a baffle which runs vertically the entire length of the contact tank. A baffle opening is provided at the lower end of the baffle to allow passage of fluid from the first contact chamber to the second contact chamber. The chlorinator includes a chlorine tablet feeder and the dechlorinator includes a dechlorination tablet feeder. The fluid under treatment flows from inlet opening to the outlet opening in a plug-flow pattern. Previous to entering the contact chambers, the fluid washes over and dissolves chlorine tablets stacked in the chlorine tablet feeder. After flowing through the contact chambers, the fluid washes over and dissolves dechlorination tablets stacked in the dechlorination tablet feeder. U-notch weirs control the fluid levels in the chlorinator and dechlorinator, regulating the tablet dissolve rate. The length to width ratio of the fluid path in the contact tank is at least about 10 to 1, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.