Process for storing a liquid or solid medium in a storage tank comprises partially filling the head chamber of the storage tank above the medium with an inert gas whose density is more than the density of air

摘要

Process for storing a liquid or solid medium in a storage tank (9) comprises partially filling the head chamber of the storage tank above the medium with an inert gas whose density is more than the density of air. An Independent claim is also included for a storage tank for a liquid comprising an inert gas line (10) connected to a float (5). Preferred Features: The inert gas is fed into the storage tank without an over pressure. A liquid (7) is stored in the tank and the float is placed on the liquid. The feed of inert gas is controlled so that an inert gas layer of 50-150 cm thickness is formed on the liquid. The float is made from a stainless steel.