As the rapid recovery of China from the global pandemic situation, the economy is gradually booming up and also the various industries. Recently, a domestic client in Tianjin purchased a separation set of machines, including a GNLW454ET decanter centrifuge and a GNSD90 three phase disc stack separator.

1. GN Decanter Centrifuges. Decanter centrifuges are always quite efficient in separation works for solids and liquid separating. For different treating capacities, GN put to market centrifuge sizes covering from 9 inch diameter bowl to 30 inch diameter bowl. GN Centrifuges are also grouped according to different speeds. There are middle speed models and high speed models. And even for a same bowl diameter and same speed centrifuge, GN detailed them into quite specific models according to different applications, just a bit difference in centrifuge impeller cone angle, same sized centrifuge could perform differently as more clearer or much dryer. GNLW454ET is one of 18 inch bowl centrifuges, with bowl length diameter ratio as 4, which is suitable for oily sludge separation, especially after chemical dosing.

2. GNSD90 three phase disc stack is also referred as a 3 phase separation for oil, water and solids. Oily sludge is always mixture of oil, water and solids. This mixture is always of high viscosity and density, and quite difficult to separate. But the value after separation is quite attractive, for one thing, the recovered oil is expensive, the water could be reused into separation procedure, and the solids could be easier and safer discharged. In this case, a disc stack is quite useful after a decanter centrifuge separation.

3. Decanter centrifuge and disc stack are efficient combination for oily sludge treatment, together with a chemical dosing unit to help leveling the oil and water, and also demulser the oil wrapped on solids particles. If there are big particles too large for decanter centrifuge, before the centrifuge, there could be a shale shaker.

For complete solution, welcome to contact GN Solids Control directly.