Monthly Archives: August 2017

GN Decanter Centrifuge and GN Cuttings Dryer

GN Solids Control has manufactured thousands of solids control equipment include decanter centrifuges. Now GN customers from over seventy countries are using GN centrifuges.
Today we looked through those former inquires we got from our customers, they are still pretty valuable to share with you. Here is one example:
1)For the GNLW363CG centrifuge, please have the 3 pulley system installed. Please let me know the rotational speed for high, medium and low when you can. I have the gear ratio recorded. We will take the centrifuges with the standard motors and control panels if they meet spec. item 2 to follow.

Recommend you to choose Speed: 1800/2500/3200 RPM.
2) For any motors we do order, 60Hz, USA standard voltages, ICE-Ex (d)(e)(i)(nA) .
We can use motors with 460V/60HZ and to meet IEC Ex and Explosion proof Mark is Exd IIB T4 which meets the oil gas industry for international standard. Please comment if it is acceptable by you? We can even have the UL Ex Motors, but for Control Panel if you need UL we’ll have to source from US or Canada.
Here are several questions and answers on cuttings dryer:
Air Knife design will need to be determined later. Please send us some photos and descriptions, we can put it in our Dryer. Some other customers also have given us some concepts.
1) Can you supply JUST the motor conforming to 60Hz, USA voltage, ICE-Ex (d)(e)(i)(nA) capable of variable speeds WITHOUT the electronic drive and control system for the GNCD930 and still meet customer’s delivery schedule?
It will be 60 Days for GNCD900 to be ready for shipment. While right now, GN Solids have the cuttings dryers stocking in Houston warehouse.
2) Can you supply motors conforming to 60Hz, USA voltages, ICE-Ex (d)(e)(i)(nA) capable of variable speeds WITHOUT the electronic drive and control system to the GNG30-75 and still meet delivery schedule? It will be 45 Days for manufacturing.

GN Trailer Mounted Dredge Dewatering System

GN Solids Control has been provided many dredge dewatering systems for global customers. Based on the move methods, GN dredge dewatering system is classified into the following 2 types: skid mounted treating system and trailer mounted treating system.
Just take example of one trailer mounted treating system provided to customer, the following shows questions that customers are interested:

1. Total power requirement at most likely and max load for determining power generator requirements.
GN Solids provides ‘GN Equipment Power List’. All the listed components are controlled by GN control boxes. You might need to prepare a distribution center and connect them to GN control boxes.
2. System dead load and axel load (ESAL).
’35ton 2axle LOW BED’, whole dead load can hold up to 35T, axel load is 21T.
3. Is it possible to get the transporting height of each trailer below 14 ft so we wouldn’t require to permit the transport of this system in Texas?
We can decrease the height below 14ft. As there is no separated compartment, so there’s no pump cavitation. #1 tank and #2 tank they are connected by overflow, as long as the #2 tank liquid discharged port higher than centrifugal pump inlet port, there will be no cavitation as long as #2 tank has fluid inside.
4. Does GN have any clients that use conveyor systems to move the dredge material away from the trailers, or do they just use bucket loaders to move it on the fly?
It depends, some of GN customers using screw conveyors while some of them use bucket loaders. Screw conveyor can be used to transport to a truck directly, while the bucket loaders can be replaced with another one and also move easily.
5. Max pump pressure and pressure system weak points.
Max pressure 0.5Mpa, there’s no pressure weak points as the whole system pressure is less than 1.0Mpa, actually they are not pressure pipe system.
6. Details on pressure safety system such as pop-off valves and other PSVs.
This system has on and off valves, centrifugal pump inlet and mud cleaner inlet both controlled by valves. There’re no pressure control components inside as this is not a pressure system.

GN Soil Washing Treating Unit

As a turn-key solids control system provider, GN Solids Control provides various whole treating units that can be widely used in various of industries. During the past half years, GN Solids Control have received more inquires on oil slurry or soil remediation treating. Based on the former experiences provided to thousands of customers, GN Solids Control is able to provide a customized turn-key system.
Today, we would like to share some info on the soil washing or soil remediation treating unit. GN Solids Control provides shake shakers as the first treating unit so large solids can be separated out. After treated by shale shaker:
1. Slurry Pump
The Slurry Pump should be over sized. Model GNSB4X3A-11J. It will feed the Decanter centrifuge.
2. 14 Inch Decanter
The 14 inch decanter will remove the small micron soil that wasn’t removed at the GN shale shaker in the first phase treatment. GN Solids Control provides whole centrifuge treating unit includes a stand, solids screw conveyor, centrifuge tank, etc. Model GNLW364D-VFD

3. Chemical Dosing Equipment
Chemical Dosing Equipment. Model GNDU-2000A. This will help centrifuge to separate out those finer solids. Usually, centrifuge can only separate out solids larger than 10 microns just by using mechanical separating method.
4. Inclined Plate Clarifier
GN Inclined Plate Clarifier is used to separate those solids after treated by centrifuge. Centrifuge treated slurry will run into the clarifier by gravity.

5. Oil Water Separator
An oil/ water separator will be used to separate oil and water. This will be added based on the how much oil contains in the final liquid.des oil water separator 1 des oil water separator
6. 9 Inch Decanter
9 Inch Decanter Model GNLW224D. Sludge from the bottom of the Inclined Plate Clarifier can be dewatered by using GN mini centrifuge. Running parameters can be adjusted based on the feeding sludge.
Some sets of soil remediation units have already been used in Middle East, Africa and North America.