Patent ID: 7493800
Filing Date: 2009-02-24
Classification: B01J,C08F,G01N

Abstract:
1. In a method for detecting the presence of at least one undesired liquid in a host liquid in a collection vessel for said host liquid, said vessel having in a lower part thereof at least one sump having an interior in fluid communication with said collection vessel, said at least one sump having at least one drain line that has an open interior in fluid communication with said at least one sump interior, the improvement comprising providing at least one electrical capacitance probe in communication with said at least one drain line interior, said probe having a set point for indicating essentially pure host liquid, employing a first valve in said at least one drain line upstream of and close to said probe, employing a second valve in said at least one drain line downstream of said probe, initially closing both said first and second valves so that said at least one drain line downstream of said first valve contains vapor and is empty of said host liquid, opening said first valve and cracking said second valve to remove said vapor from said at least one drain line downstream of said first valve until said host liquid is in communication with said probe and said host liquid fills said at least one drain line downstream of said first valve and upstream of said second valve at which time said second valve is closed, if no undesired liquid is detected by said probe keeping said first valve closed and opening said second valve, if undesired liquid is detected by said probe leaving said first and second valves open until no undesired liquid is detected by said probe at which time said first valve is closed, and passing said host liquid and any other of said liquid drained from said sump to a combustor to incinerate same, whereby a minimal amount of said host liquid that is free of said undesired liquid is passed to said combustor.