| 摘要 |
Method for reducing emission of volatile components from cargo being loaded, shipped and unloaded from a series of tanks of a ship. When unloading, the first tanks being unloaded are supplied with inert gas in a manner known per se, or supplied with gas substantially comprising volatile components, until all tanks are empty. When unloading subsequent tanks, the atmosphere in the preceding tanks that were unloaded is displaced by supplying inert gas, so that the atmosphere comprising volatile components is transferred to the tanks being unloaded. These steps are carried out until all tanks have been unloaded, whereupon the last unloaded tank(s) contain an atmosphere comprising volatile components, whereas the remaining tanks contain substantially pure inert gas. When loading, the tanks containing most volatile components are loaded first, and the atmosphere thereof is displaced to the following tanks to be loaded, at the same time as the atmosphere in these tanks is vented to the surrounding atmosphere. When loading the last tank(s), the gas comprising volatile components may be displaced or recovered, or optionally vented to the surrounding air. |
