E. I. du Pont de Nemours & Co., Inc.
Waste aqueous liquid load was reduced by 25,000 pph by installing a larger calandria (reboiler) on an ammonia stripper column.In the original design of the column, 25% of the heat input was provided by direct steam injection into the base of the column. The balance of the heat was head transfer through the calandria. Installation of the larger calandria provided for all of the heat input through the calandria which eliminated the direct steam injection. All of the condensate that resulted from the direct steam injection became aqueous liquid waste that had to be disposed of, thus elimination of the direct steam injection eliminated the heat portion of the waste generated.
Reduction of 25,000 pph of aqueous liquid waste that is currently disposed of in a deep well disposal system.
Details of Reductions
Additional Information :
Future savings will be realized through reduced investment when facilities are installed to dispose of the aqueous liquid waste by methods other than deep well disposal.