초록 ▼

A method has been invented for separating components of a wastewater stream, the stream containing water, oil (e.g. heavy oil and/or light oil), undesirable organic material (solid and/or liquid), and contaminating solids, the method including feeding a wastewater stream to a first pre-treatment uni

A method has been invented for separating components of a wastewater stream, the stream containing water, oil (e.g. heavy oil and/or light oil), undesirable organic material (solid and/or liquid), and contaminating solids, the method including feeding a wastewater stream to a first pre-treatment unit producing a first pretreated stream, feeding the first pretreated stream to a first centrifuge for centrifugal separation, producing a first liquid centrifuged stream, and a second liquid stream, and feeding the first liquid centrifuged stream to a second centrifuge producing a resultant centrifuged stream of recoverable oil and a water phase centrifuged stream which can be treated further or fed back to a source for re-use. The source may be a facility from the group including refineries, chemical plants, paper mill plants, and oil and gas processing facilities.

대표청구항 ▼

[ What is claimed is:] [1.] A method for separating components of a wastewater stream, the stream containing water, oil and contaminating solids, the method comprisingfeeding said wastewater stream to a first pre-treatment unit producing a first pretreated stream,feeding the first pretreated stream

[ What is claimed is:] [1.] A method for separating components of a wastewater stream, the stream containing water, oil and contaminating solids, the method comprisingfeeding said wastewater stream to a first pre-treatment unit producing a first pretreated stream,feeding the first pretreated stream to a first centrifuge for centrifugal separation, producing a first liquid centrifuged stream, and a second liquid stream, andfeeding the first liquid centrifuged stream to a second centrifuge producing a resultant centrifuged stream of recoverable oil and a water phase centrifuged stream, wherein the oil includes light oil and the first liquid centrifuged stream is an overflow stream containing light oil, contaminating solids, and water and the second liquid stream is an underflow stream containing water, dissolved organic material, and suspended solids, the method further comprising:feeding the overflow stream to a second pre-treatment unit for breaking emulsions therein,feeding the underflow stream to the second pre-treatment unit for removal of water therefrom,the second pre-treatment unit producing a feed stream containing contaminating solids which is fed to the second centrifuge, and a water phase stream containing organic material and suspended solids.