GN Solids Control applied the technology of heating washing and chemical enhancing to treat oil sludge, oil slurry, waste oil and water.
Heating system of GN oil sludge separation system
GN Solids Control equips heating pipes inside mud tanks of the oil sludge separation system, and heating pipes and nozzles on coarse separation shale shaker. Clients can choose electrical oil heating system or electrical steam heating system for the application.
As the normal temperature is high enough. The function of heating is to reduce the viscosity of the oil sludge. Another reason of heating is to maximize the performance of chemical agents. The most suitable temperature for chemicals is around 70C degree. In some countries of Middle east, heating system is not necessary.
Chemical agents used for oil sludge and dewatering treatment
There are normally 3 types of chemicals will be used for oil sludge treatment. Clients can choose to use 1 or 2 or 3 types of chemicals based on the sludge situation and separation demands.
1) Sludge separating agent or surfactant: If the oil sludge viscosity is till high and difficult to separate after heating, sludge separating agent can be dosed before separation. The function is to improve the separation performance of the oil sludge.
2) Demulsifier: After sludge separation agent, demulsifier can be added to make the oil sludge emuisified, to remove the oil and water in the emulsified oil-water mixture.
3) Flocculant (PAM) or coagulant (PAC) : for ultra fine solids separation before enter into decanter centrifuge and disc centrifuge. If you already dosed demulsifier, you should consider and calculate carefully to see you add PAM / PAC or not. As demulsifier is to make oil, water and solids separated. But PAM / PAC is for flocculation. PAM / PAC will reduce the demuisifier performance and to make the oil, water and soil mixture again.
In some projects, acid or alkali will be dosed before separation to balance the PH. If you need to add acid or alkali, it is normally added before other chemical agents. The suitable PH can improve separation performance in some degree, but not much.