Novel Conditioner For Efficient Dewaterability And Modification of Oily Sludge With High Water Content

Abstract

The Oily sludge with high water content (OS) was dewatered, modified and converted into solid fuel by a novel chemical conditioner (OSO-101). The effect of OSO-101 dosage on the dewaterability of OS was studied, showing that OSO-101 dosage of 15% (wt.) could achieve the best dewaterability efficiency of OS (98.18%). Meanwhile, compared with some conventional conditioners, OSO-101 developed by our team was more effective in improving OS dewaterability efficiency. And OSO-101 may have free radical reaction, polar reaction and redox reaction with petroleum hydrocarbons in OS, thereby polymerizing and forming condensed solid structures. The calorific value change of OS after conditioning, heavy metal content and dioxins content of fly ash leached from incinerated product were measured for resource analysis and environmental assessment. Results showed that the resultant OS fuel blocks had extremely low content of heavy metals, dioxins and other toxic and hazardous substances leached from fly ash, thereby no secondary treatment and fully meeting environmental protection emission standards. Additionally, OSO-101 had certain economic rationality, and could effectively recover the calorific value contained in OS. This research is expected to provide new insights for efficient dewaterability and modification of OS, as well as subsequent resource utilization and harmless treatment, bringing potential environmental and economic benefits.

Study and application of oily sludge harmless gel particles system for enhanced oil recovery

“…It is a long way and there is secondary pollution. In recent years, many oilfields have carried out research on the technology of sludge profile control, through chemical treatment of sludge to prepare profile control agent used in water injection wells, can achieve the treatment of oil-bearing sludge and improve the effect of water injection development, it is an economical and effective sludge treatment method [1][2][3][4][5][6][7][8][9][10][11][12] . However, due to the uneven particle size of oily sludge, poor suspension, low plugging strength and other factors lead to poor field application effect [13][14][15] .…”