GN Solids Control is a leading decanter centrifuge manufacturer in China. Now GN Solids Control centrifuge covers 9 inch bowl centrifuge, 14inch bowl centrifuge, 18inch bowl centrifuge, 22inch bowl centrifuge and 30inch bowl centrifuge. GN decanter centrifuges are widely using in various solids and liquid separation area, such as drilling mud separation, dredging water treating, chemical separation, oil sludge separation and industrial water treating etc.
GN Solids Control centrifuge had variable speed and fix speed control model, based on the working environment, GN Solids Control centrifuges have Zone I or Zone II explosion-proof centrifuge.
As we all know, GN Solids America LLC is the brand company of GN Solids Control. Now GN Solids America has some decanter centrifuges stocking in Houston warehouse. Customer can pick up centrifuge from GN Houston warehouse directly without waiting for the long time shipping.
Today we would like to give everyone a short introduction of GN 9 inch bowl centrifuge. GN Centrifuge is mainly including the following components: rotating bowl, screw propeller, supporting frame and 2 driven motors.
GN centrifuge rotating bowl is made by stainless steel, as whole piece is made by centrifugal casting without welding. Inside the rotating bowl, screw propeller is protected by tungsten carbide tiles based on the using conditions.

Due to the portable character of GN 9 inch bowl centrifuge, it’s largely used in remote area for diamond drilling or core drilling mud control so helicopter can move it can move it conveniently.
9 inch centrifuge is also called GN baby centrifuge, the treating flow rate is around 50GPM which is pretty popular in many labs for test scale usage. Last year, GN solids worked together with some USA laboratories and research centers, many scientists are using GN 9 inch bowl centrifuge to treat slurry and eliminate finer particles larger than 2 to 5 microns.

8.4# Centrifuge &Disc-centrifuge
Slurry in #1 centrifuge tank is pumped by #2 screw pump into #2 centrifuge: solids fall into cuttings box, liquid falls into #2 centrifuge tank and then feed into #1 disc-centrifuge by an inline pump to finish 3 phase separating: oil , water and solids. Dis-centrifuge needs water to discharge when working, a water tank is fixed one one side of #2 centrifuge tank. Meanwhile, on the other side of the centrifuge tank, an inline pump is used to feed slurry.

9.5# Disc-centrifuge & Surge Tank
1# disc-centrifuge treated oil goes into #5 unit’s #1 oil surge tank, water goes into #1 water surge tank. Slurry in #2 oil surge tank of #5 unit is pumped into #2 disc-centrifuge by inline pump: oil goes into #1 oil surge tank, water goes into #1 water tank and solids discharged to the outside. When the oil in #1 oil surge tank reaches to a certain level, liquid level alarm monitors the level and gives signal so the inline pump can transfer slurry into appointed position. At the same time, #1 water surge tank slurry is transferred to #6 gravity oil/water separator by an inline pump.
10.6#Gravity Oil/Water Separator, Water tank
Inline pump transfers slurry into #6 Gravity Oil/Water Separator: oil goes to #6 unit’s #3 oil surge tank and water goes to #6 unit’s #2 water surge tank. Slurry in #2 water tank is transferred by an inline pump to micro bubble treating unit for further treatment. Inline pump and pipes are fixed near #2 water surge tank, in case water is not clean enough, it can be pumped into #5 unit’s #2 oil surge tank and to be further treated by #2 disc-centrifuge.
11. Oil tank
Inline pump transfers the slurry into #7’s micro bubble treating unit, after treated: clean water is send into #7’s water tank and provide recycled water; oil goes to #6 unit’s #3 oil surge tank which is monitored by liquid level alarm. Inline pump is used to transfer the slurry into appointed area. With the whole system runs, waste sludge can be recycled and also solve the environment pollution issue.
12.Chemical Dosing unit
All outside pipes; all inlets are controlled by valves on and off; can add chemicals/water in different position.

GN Oil Sludge System Working Process
Oil sludge in the V-Tank is separated by gravity into different layers after mixed by the bottom screw conveyor, the top floating oil (large portion) is transferred by a diaphragm pump into #2 oil surge tank, and the left small portion oil is feed into afterwards shaker shaker by centrifugal pump to finish the first phase separating.
GN Shale shaker can separate out most of those large solids, liquid is feed into #1 GN Decanter Centrifuge by screw pump where the second phase separating is achieved.

Solids treated by GN Centrifuge fall into the bottom tank of #1 centrifuge and diluted a second time. And liquid goes to #4 Centrifuge and Disc-Centrifuge Treating Unit’s Tank. Slurry in #1 centrifuge tank is transferred by #2 screw pump and feed into #2 Centrifuge to further separate: solids are collected by a GN cuttings box; liquid is fall into #2 Centrifuge tank, a inline pump is used to feed it into #1 Disc-Centrifuge where solids, oil and water is treated at the first time: oil goes to #5 unit’s #1 oil surge tank; water goes to #5 unit’s #1 water surge tank; solids discharge to the outside.
Slurry in #2 oil surge tank of #5 unit is feed into #2 Disc-Centrifuge by inline pump: oil goes to 1#oil surge tank; water goes to 1#water surge tank; solids discharge to the outside.
Slurry in 1#water surge tank of #2 unit is feed into #6 GN gravity oil/water separator by inline pump: oil goes to #6 unit’s #3 oil surge tank, water goes to 6# unit’s #2 water surge tank and then feed by another inline pump to #7 micro bubble treating unit: clean water goes to #7 unit’s water tank, provide recycled clean water for this whole system; oil goes to 3#oil surge tank of #6 unit. A oil pump is fixed on #3 oil surge tank, in case the oil is not clean enough, oil pump can transfer back to #2 oil surge tank, and then treated in 2#GN disc-centrifuge again until reach the final treating demands.

GN Solids Control manufactures different sizes of decanter centrifuges. GN 9inch bowl centrifuges are largely used in small volume slurry treating, such as the chemical slurry, pharmacy slurry, diamond drilling slurry etc.
There are hundreds sets of GN 9 inch centrifuges working in USA and Canada. Several weeks ago, GN Solids Control provide 6 sets to a USA customer. This customer will use GN centrifuge to treat Aluminum Oxide Slurry.
The Aluminum Oxide slurry solids content is around 8% to 10%, customer would like to thickening the slurry into 60% to 80%. By using a chemical mixing tank with a GN mud agitator, the solids Aluminum Oxide Slurry is mixed with water first. Then it is feed into GN 9 inch bowl centrifuge by using GN screw pump.
In order to eliminate those finer solids, GN chemical dosing unit is also used. Sometime, customers might not want to use chemical dosing unit due to environment protection rules, because using chemicals might cause pollution. One GN Slant Plate Clarifier might be used after the slurry treated by GN decanter centrifuge.
GN 9 inch centrifuge has 2 models: variable speed and fix speed. GN 9 inch centrifuge is mainly including the following components: rotating bowl, screw conveyor, centrifuge frame and driven motors. Some customer also purchase GN centrifuge rotating assembly (rotating bowl and screw propeller) to modify by themselves. GN 9inch centrifuge now has 2 version, the D version is fixed by only one driven motor while the E version is fixed with 2 driven motors.
GN Solids America LLC is located in Houston, TX. GN has several 9 inch centrifuges in stock as well the other models such as 14inch centrifuge. GN Solids Control centrifuge has a wide usage for different slurry separation. Please feel free to connect with GN sales for your decanter centrifuge usage.