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New challenges for vapour recovery systems

New vapour recovery applications for multi-product storage require much more flexibility to treat various VOCs.

In the past most Vapour Recovery Units (VRU) have been installed in conventional and standardized applications such as storage terminals handling gasoline or other pure products only. In such applications the recovered condensate was mixed with the compatible absorbent liquid and returned to storage for further use. In such isolated applications no product vapour mixes
occurred and systems were tailored for one product.

Recently the requirements have become more comprehensive:

• New emission control laws and guidelines require more efficient vapour recovery systems
• Multi-product handling requires treatment of vapours from of a wide range of common refinery or petrochemical products, preferably in one sole vapour recovery unit
• Energy saving and emissions control must be optimised. Energy saving, capacity control options and the prevention of secondary emissions , e.g. CO2 from flaring need to be applied.

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