Patent · US Expired

Method and apparatus for reducing emissions from breather lines of storage tanks

US6059856A · kind A · utility

12Cited by

1References

6Claims

0Family size

Assignee

GKSS-Forschungszentrum Geesthacht GmbH · DE

Inventors

Klaus Ohlrogge · Geesthacht, DE
Jan Wind · Barsbüttel, DE

Key dates

Filing date	Apr 10, 1997
Grant date	May 9, 2000
Priority date	—
Expiry date	Apr 10, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB67D7/049
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method and apparatus is disclosed for separating a vapor-gas mixture formed above a liquid in a tank and which mixture is exhausted from the tank through an exhaust line in order to relieve overpressure in the tank. The mixture is passed from the tank through a membrane unit having a separating membrane and underpressure is generated at least intermittently, on a permeate side of the membrane unit, by a pump. This produces on the permeate side of the membrane permeate enriched with vapor and on the retentate side of the membrane retentate deleted in vapor. The permeate is returned to the tank and the retentate is exhausted to the atmosphere via the exhaust line.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.