Apr 15

When to use a centrifugal or a Positive Displacement pump (“PD Pump”) is not always a clear choice. Usually we use a positive displacement pump to feed for decanter centrifuge, it is called single screw pump.

The major benefit to use a positive displacement pump other than centrifugal pumpis that, it will not break the fine solids to smaller, so the centrifuge can separate the solids easily. Centrifugal force of centrifugal pump will cut the solids to smaller, it is not good for centrifuge’s operation.

positive displacement pump for centrifuge

positive displacement pump for centrifuge

How to operate a screw pump when feeding to decanter centrifuge?

1 Full fill the pump chamber with drilling fluids , if the media is too viscosity, then inject into other liquids; Inject the mud from the pump inlet connection, and rotate the pump by hand along the running direction of the motor to make the mud full fill the suction chamber.

2 Open the screw pump inlet valve and outlet valve (the valve is fully opened to prevent overload or no load suction), start the motor.

3 The pump should be started under the condition of fully opening the Inhale row valve and bypass valve to minimize the start load. Gradually close the bypass valve after the motor reaching the rated revolution.

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Apr 22

GN solids control can design and manufacture the complete line of drilling waste management system, including shale shaker, high G dryer, vertical cutting dryer, decanter centrifuge, screw pump, etc equipments.

The first step for drilling waste management is to separate the solids cutting from the liquid drilling mud. Once solid and liquid drilling waste have been separated, companies can use a variety of technologies and practices to manage the wastes. For some applications, drilling wastes are solidified or stabilized prior to their ultimate management practice. The management technologies and practices can be grouped into three major categories: waste minimization, recycle/reuse, and disposal.

drilling waste management centrifuge

drilling waste management centrifuge

Function of waste minimization

 It can reduce volume or impacts of waste, including the following two aspects.

1 minimize generation of drilling waste

2 use mud and additives with lower environmental impacts

Function of recycle/reuse

 1 recycling mud

 2 roadspreading

 3 reuse of cutting for construction purpose

 4 restoration of wetlands using cuttings

 5 use of Oily cutting as fuel

 How to disposal?

 1 discharge to Ocean

 2 slurry injection

 3 onsite burial (pits,landfills)

Drilling waste management decanter centrifuge

GN solids control can produce 3 models decanter centrifuge for drilling waste management system.

1 Middle speed centrifuge LWF450x1000N

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