ZEBrA – Zero-Emission Breathing Application for Storage Tanks

dashboard Overview

dashboard  Motivation

Large-volume storage tanks for liquid media characterise the appearance of many sites in the chemical and petrochemical industry in large numbers. Due to their construction, the storage tanks are usually only designed for low overpressures and underpressures. Due to operating conditions, filling and emptying processes, temperature fluctuations during the course of the day, as well as weather and seasonal influences, sensitive deviations from the permissible internal pressure can occur. In order to prevent the storage tanks from collapsing or bursting, they are protected with breathing valves according to the current state of the art. Breathing valves ensure pressure equalisation from the inside – to ambient pressure – and thus prevent the build-up of impermissible or even critical pressure inside the storage tank.

To compensate overpressure, gases of the stored medium are emitted which can be harmful to humans and the environment. With underpressure, on the other hand, ambient air is drawn in, which can lead to contamination of the stored liquid. With ZEBrA, environmentally harmful emissions from storage tanks are prevented and, at the same time, product losses for operators are reduced to almost zero. In this way, environmental protection and economic operation are promoted in equal measure.

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