Patent ID: 9504941
Filing Date: 2016-11-29
CPC Classification: B01D,B01J,B63J,C02F,F28F,G01N

Claim Text:
1. A system for exchanging heat content in a process between an aqueous process stream containing oily contaminants and a normally oil-free aqueous stream, said system comprising: (a) a plurality of heat exchangers; (b) means for dividing the aqueous process stream into a plurality of first sub streams and means for dividing the normally oil-free aqueous stream into a plurality of second substreams; (c) means for passing one of each of said first and second substreams through one each of the plurality of heat exchangers where heat transfer can occur; (d) means for reuniting the plurality of first sub streams downstream of said heat exchangers and returning the reunited aqueous process stream to the process, and means for reuniting the plurality of second sub streams downstream of said heat exchangers and returning the reunited normally oil-free aqueous stream for recirculation to said heat exchangers; and (e) a visual quality indicator (VQI) device adapted for determining the presence of oily contaminants in an aqueous stream, being positioned downstream of each of said heat exchangers to receive at least a portion of the respective second substream having passed through the heat exchanger, whereby direct visual inspection of each of said devices can enable identification of any of the heat exchangers at which oil leakage may have occurred between the first and the second substreams; (f) said device comprising: