Patent ID: 6746609
Filing Date: 2004-06-08
Classification: B01J,C02F,F28F

Abstract:
A process for treating cooling tower water in a system which includes a recirculated evaporative cooling water stream, a source of make-up water, an evaporative cooling unit, a heat exchanger, and a bleed-off line, said process comprising:determining the pH of saturation of the recirculated evaporative cooling water stream; determining the pH of the recirculated evaporative cooling water stream; determining the difference between the pH of saturation and the pH and, based upon said difference selectively directing a side stream of said source of make-up through at least one of a unit containing a strong acid cation exchange resin and a unit containing a weak acid cation exchange resin to control the pH of the recirculated evaporative cooling water system within a predetermined range of the pH of saturation; monitoring the corrosion potential to provide a measurement which determines an amount of corrosion inhibitor to be added; and adding a corrosion inhibitor to said recirculated evaporative cooling water stream in response to the measurement obtained by monitoring the corrosion potential.