Evaporative loss reduction
US4422301A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 7, 1980 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | May 7, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D5/0039
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process and apparatus for recovery of vapor which is contained with air in a space above a volatile liquid which is stored in a container, especially a petroleum distillate or other costly liquid. The process employs the pressure build up due to thermal effects on the space above the volatile liquid to drive the vapor through a heat exchanging region at which a venturi evaporative cooling unit is used to extract heat from the vapor and partially condense the vapor without significant compression. A part of the condensed vapor is recycled to the heat exchanging region and introduced as a spray for a condensation "seeding" effect. The vapor is further cooled after cooling by the venturi evaporative cooling unit in a second and even a third cooling stage; these stages can include use of a conventional refrigeration unit to chill a heat exchanger and an ultra low temperature can be achieved by expanding liquified gas such as nitrogen in an insulated cyclone to achieve high percentage recovery of the vapor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.