Plant for treatment of sediment of natural and waste waters
US4786407A · kind A · utility
Inventors
Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F11/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A plant for treatment of sediment of natural and waste waters comprises a crystallizer (1), a melter (2), a condensing heat exchanger (4), a compression refrigerating unit (3) communicating with the crystallizer (1) and the melter (2) which is in communication with the sediment dehydration apparatus (5). The evaporator (8) of a crystallizer (1) has two cylinders (9). The plant comprises a refrigerant feed unit (13) and a refrigerant discharge unit (15), a planetary gear drive, a sediment application unit (17) and a sediment removal unit (19). The crystallizer (1) has a recirculation station (6). The sediment application unit (17) is made in the form of pour-on nozzles (18). Installed between the cylinders (9), at an angle to their walls with a clearance (.delta..sub.1, .delta..sub.2) are screens (12). The sediment removal unit (19) has at least two cutting tools (20) with flexible pick-ups. The refrigerant feed unit (13 ) has a perforated header (14) while the planetary gear drive has a variable speed drive (23). The melter (2) has sprinkling nozzles (30) and a device for collection and removal of sediment solids while the condensing heat exchanger (4) is located outside of melter …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.