Overcoming Seasonal Cooling Problems in Distillation Column Overheads
21 September 2021
Sponsor: Aggreko
Some of the most ubiquitous and, in our opinion, most serious problems confronting operators are the results of seasonal or diurnal variations in ambient air and cooling water temperatures. Generally, distillation column overhead cooling systems are designed for some sort of average summertime cooling water or air temperature. These are routinely exceeded, according to seasonal weather data, for extended periods during the peak summer months. Also, over time, column throughputs have been increased as units were debottlenecked or when other process changes were made. On occasion, purity specifications may change, inexorably becoming more stringent.
We will show examples of how it is feasible to restore column overheads cooling capacities to winter-like conditions by installing temporary, or seasonal, supplemental cooling solutions. Also, we discuss some of these techniques that have been proven successful in a large number of past applications in the petroleum refining, petrochemical, and complex chemicals industries.
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