Patent ID: 6560992
Filing Date: 2003-05-13
Classification: F25J

Abstract:
In a process for adjusting the capacity of a low-temperature rectification unit having a high pressure column (1) and a low pressure column (2), comprising passing a fluid into the high pressure column (1) and passing liquid from the bottom of high pressure column (1) through a conduit into the low pressure column (2), the improvement comprising setting a nominal value for the desired amount of flow of liquid from the bottom of the high pressure column (4) to the low pressure column (2) and adjusting a flow valve (5) integrated with said conduit so as to obtain the desired amount of flow in response to said set value and permitting the liquid level of the liquid at the bottom of high pressure column (1) to self-adjust, without being dependent on a set nominal value, corresponding to the amount of liquid that is removed.