Jun 26

Centrifuges are quite popular in separation industries, in oil and gas solids control, in drilling cuttings waste management, and in oily sludge separation projects. It is perfect solution for separating out particles from 2 microns to 5 microns. The centrifuges are playing more and more important role. But still, it is more difficult to operate the centrifuge well and let the centrifuge to work more efficiently.



There are some suggestions to help improving the centrifuges’ performance:
1. Before using the decanter centrifuge, make sure the material which enters the centrifuge are not so big for the centrifuges, in order to avoid blocking of centrifuges. For instance, a high speed centrifuge is capable to separate out particles from 2 microns to 5 microns. In practice, particles no larger than 2mm could enter the centrifuges. So it is suggested to use a shaker unit before the centrifuge.
2. How about when the particles are too small? When there are so many extra fine particles, it would be difficult for the centrifuge to separate the particles out. In this case, a chemical dosing unit is invited before the centrifuge. By adding flocculant into the material, the extra particles flocculate into bigger ones in order to be separated by centrifuge.
3. If the material is of too high viscosity, some polymers fed by the chemical dosing unit into the material, to lower down the viscosity. Then the separation result would be much enhanced.
4. Confirm the material content before choosing a suitable bowl rotating speed and a suitable differential speed. The material content information includes: solids content percentage, the distribution of each particle size, and etc. Such information helps the operator to adjust the centrifuge parameters.
GN Solids Control is quite professional in centrifuge design and manufacturing, GN centrifuge sizes range from 9 inch bowl to 30 inch bowl. Pls contact GN for consultancy.


written by shale shaker \\ tags: , ,

Nov 01

In a complete waste management system in Oil and Gas drilling, no matter it is WBM or OBM or SBM, there are 2 steps of waste management systems, one is standard one, more popular and widely used, and the other is advanced system, for further separation, in case the end user is not satisfied with the separation result, this system comes into use.

1st step separation: Standard Waste Management System:

This is the widely recognized waste management system, always consist of following equipments:

  1. Vertical cuttings dryer for OBM and SBM, or High G Shale shaker for WBM.
  2. High speed decanter centrifuge.
  3. Screw conveyors, or named augers for transporting drilling cuttings.
  4. Necessary tanks for storage.

The standard waste management system is one of GN Solids Control’s best seller systems, because GN is very professional in such solids control systems. Just in this year, in past 10 months, GN has sold out 10 sets of  such waste management systems.

dewatering unit

a complete system with advanced waste management system

2nd step separation: Advanced Waste Management System.

This system is more called as Dewatering system or Dewatering unit. If the 1st step’s principle is physically separation, the 2nd separation system is combination of both physical and chemical separations.  This system includes such devices:

  1. Flocculation Unit, by adding some chemicals into the mud to be treated just before it enters into centrifuge, we need such a unit. It contains of chemical feeding and mixing devices, and corresponding space like tanks.
  2. Another decanter centrifuge, with high speed, for separation the solids out, such solids are comparably larger particles combined by small particles via chemical treatments.
  3. Such dewatering unit could be located in a 20ft container, including centrifuge or not, depending on customers’ request.

Now because of customers’ requests, GN also has  such systems available. If you need more information about that, we have designs for previous projects for your reference.


written by shale shaker \\ tags: , , , , ,