Tag Archives: screw pump

Equipment Used for Feeding and Discharging for Decanter Centrifuges

Decanter centrifuges are quite important and efficient equipment used for separation of liquid and solids only second to the shale shakers. By the high G force generated by the high speed rotating of centrifuge bowl, the liquid will be splashed and the solids phase is to be pushed out. For achieving a satisfactory separating result, we have to make sure there are suitable equipment for feeding the decanter centrifuge and some other facilities for discharge.
Decanter centrifuges request for stable feeding, so some pulse pumps are not suitable for feeding the centrifuges. The pump shall provide stable feeding capacities. And it would be better if the feeing volume can be adjusted as per the centrifuge speed.

2022.05.11 GNLW454ET Decanter Centrifuge 1

Normally, based on rich experience as a decanter centrifuge manufacturer, GN Solids Control normally suggest those two pumps for centrifuge feeding as below:

1. Screw pump, which is a kind of Mono pump. Inside the screw pump there are one stator and one rotor and the comparative move between them provides stable feeding volume for the centrifuge. GN VFD centrifuges’ control panels can include a control panel for the centrifuge feeding pump.

2. Submersible slurry pump is also used for centrifuge feeding purpose, mostly for constant speed centrifuges, especially when the centrifuge is located on a tank and when the tank’s space is limited.

GN has both pump types available for matching different centrifuge models.

For centrifuge discharge, normally the liquid phase after separation will flow directly to its containers with a level difference. That’s why the centrifuge is requested to be mounted on a certain height, for example, on a tank or on a skid. The solids phase discharged by the centrifuge can flow directly via a chute or be carried out by a screw conveyor below the centrifuge.

For more information, please contact renee@gnsolidscontrol.com.

Screw Conveyors and Screw Pumps for African Drilling Waste Management Company

In a recent project, GN Solids Control has provided to an old client from Africa a serious of equipment. Those equipment are to be used for drilling waste management projects. They are kind of customized models including following:

2021.9.6a Screw Conveyor

1. 10 sets Variable Speed Screw Conveyor: 7x GNSC12B-12V and 3x GNSC12B-24V. Screw conveyors are quite widely used for transferring materials in a drilling rig system or in a drilling waste management system, or in both, especially when the drilling cuttings waste management system is located along with rig and work at same time. For example, one screw conveyor can be located horizontally under the shale shakers for collecting the cuttings, then a tilt positioned one is used to receive the cuttings and feed to the vertical cuttings’ dryers inlet hopper. Variable speeds are important for the screw conveyors, because the mud condition is changing and capacity is varying, too. A speed adjustable solution can help to solve this problem and allow the screw conveyors to be suitable for more conditions.

2. 8 sets Variable Speed Screw Pump. Same as screw conveyors, the screw pumps are used for feeding the treating equipment, too. The screw conveyor is used for the vertical cuttings dryers, and the screw pump is used for the decanter centrifuge. GN has VFD controlled screw pump and mechanical speed adjustable screw pumps for option. For example in the positive pressurized control panel of a GNMS-363 decanter centrifuge, there are 3 VFD’s applied, respectively for centrifuge bowl, centrifuge back motor and the screw pump for feeding.

3. 10 sets Control Boxes. Control boxes are also one of core products GN provides. GN Solids Control is a certified electric control panel manufacturer for both non-explosive proof control panels and explosive proof control panels, including CNEX, ATEX and IECEX.
Welcome to contact GN Solids Control for more information.