Concentrating apparatus with reverse osmosis membrane
US4913809A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 15, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jun 15, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B9/113
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This disclosure relates to apparatus comprising a reverse osmosis membrane module, a reciprocating pump and a double-acting hydraulic cylinder. The pump includes a piston defining on its opposite sides a first cylinder chamber and a second cylinder chamber which has a smaller cross-sectional area than the first chamber. The first chamber connects with a feed fluid supply conduit provided with a feed valve which opens when the first chamber expands. The membrane module includes an inlet and an outlet. The inlet connects with the first cylinder chamber when the first cylinder chamber contracts in volume, and the outlet connects with the second cylinder chamber through a selector connecting with a concentrate fluid drain conduit. The selector has a first position where the second chamber and the outlet are interconnected and the drain conduit is disconnected from the second chamber and the outlet, and a second position where the second chamber and the drain conduit are interconnected and the outlet is disconnected from the second chamber and the drain conduit. The hydraulic cylinder includes a piston coupled by a rod to the pump piston and defining two chambers on its opposite sides, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.