Even though all of the screw pump, submersible slurry pump, centrifugal pump, diaphragm pump, inline pump can be used as decanter centrifuge feeding pump, but the most universal feeding pump for decanter centrifuge is mono pump or positive displacement pump. As one of the decanter centrifuge manufacturer in China, GN solids control normally used single screw pump as feeding pump, including VFD screw pump, manual variable speed screw pump and fixed speed screw pump, which depends on client’s different requirement. The most common brand screw pump we applied is Netzsch brand with reliable working and worldwide after sales service, the client can choose to get local service from Netzsch or get service from GN Solids.
When the client’s decanter centrifuge is with variable frequency drive control panel and buy feeding pump from GN, we will make the screw pump motor frequency converter into the Centrifuge VFD control panel, which can be adjusted from the PLC smart control touch screen easily according to client’s requirement, it is recommend to use variable speed motor for the screw pump for better performance.
If the client’s decanter centrifuge is a fixed speed decanter centrifuge, for example, 2700rpm, but they need to adjust the feeding rate by adjust the screw pump motor speed, manual variable speed screw pump can be selected, which with a mechanical adjustable speed gearbox. The working principal of the positive displacement pump decide that the feeding flow rate can be adjusted effectively by adjust the speed, if for other type feeding pump, such as centrifugal pump and submersible slurry pump, it is hardly to adjust the feeding rate by variable frequency, it is suggested to adjust the flow rate manually by control valves.
Not only as decanter centrifuge feeding pump, the screw pump can be also as flushing pump of vertical cuttings dryer.