We would like to cool coker cutting/quench water below the current 120 - 130 degF to reduce deheading vapor cloud and hot spot eruptions. 90 degF is the target. We are considering a stand alone, direct contact cooling tower, and recycling back to the coke pit maze. Is microbio fouling of the tower going to be a problem? We are also considering instead to divert relatively cold waste treatment feed water (storm, not process) as pit make-up and routing hot surface water to WWTP. Both options rely on temperature stratification in the sump. Any experience with cooling this water?
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