screw pump

Recently one set of small solids liquid separation unit and one package of decanter centrifuge are shipped to Europe client.
The technical configuration of the small solids liquid separation unit is as below:


1) 1 unit of 2 panel shale shaker GNZS752F installed 2 pcs composite material frame shaker screens, we can produce shaker screen from API 20 to API 300 comply with API RP13C standard. The shale shaker is to separate coarse solids from the fluids and reduce the solids content.
2) 1 unit of decanter centrifuge GNLW223D-VFD with feeding pump, the max capacity is 130L/min, normal capacity for waste water is 100L/min, the bowl length is 26.4 inch with ratio 3.


3) 1 unit of mud tank to install the decanter centrifuge and shale shaker on top, the feeding pump is installed on the skid of the tank.
4) One set of electric control system to control all the motors, all the equipments are labled and certified with CE.


Besides the solids liquid separation unit for drilling, the client also required one package of decanter centrifuge GNLW224E, the bowl diameter is 9 inch (220mm), bowl length is 36.4 inch (924mm), the ratio of bowl length/ bowl diameter is 4.2, which is much bigger than GNLW223D, which with bowl length 670mm/ bowl diameter 220mm =3. The fluids will stay in the bowl for longer time and the discharged water is more clear. The max bowl speed is 5000rpm, the typical bowl speed is 0 ~ 4500 rpm. The max G force is up to 3077G, the typical G force is 2492G, with main motor 11KW, back drive motor 5.5KW, the gearbox ratio is 95:1, the gearbox torch is 1400 N.M. The decanter centrifuge are installed on the frame for convenient lifting and transportation, the catch tank under the decanter centrifuge to collect the discharged fluids.

2 sets of vertical cuttings dryer system are shipped to domestic client. GNCM-40B standard drilling waste management system configuration is as below:


1) Vertical cuttings dryer GNCD930E: this is the ideal equipment to treat the oil based drilling waste or Synthetic based drilling cuttings, the oil on the separation cuttings is below 5%, which can meet the disposal limit for most countries, if the client need it to be lower, TDU can be applied.


2) Decanter centrifuge GNLW363C-VFD: This is the best sold model decanter centrifuges among all the series. The decanter centrifuge max speed is up to 3900rpm, the normal speed is 3200rpm to treat the low gravity solids. The max G force is up to 3062G, the typical G force is 2062G, the cut point is 2 ~5 microns. Except for GNLW363C-VFD decanter centrifuge with 14 inch bowl diameter, we can also produce GNLW364EP-VFD to treat the waste water when the water clarity is required strictly. If the client need bigger treating capacity, we will suggest 18 inch, 22 inch, 30 inch centrifuge bowl.
3) Submersible slurry pump GN50YZ20-18A as feeding pump of decanter centrifuge, this is not the best option pump to feed the fluids to the decanter centrifuge, but it is vertically installed, it can save space on the mud tank compared with screw pump, also the maintenance cost is cheaper compared with screw pump. The screw pump works steadily to feed the decanter centrifuge, the flow rate can be adjusted by VFD control panel by changing the frequency.
4) 2 units of Mud agitator installed on the mud tank to mix the drilling fluids
5) Mud tank skid, the decanter centrifuge are installed on it, the vertical cuttings dryer is installed on the frame. The complete skid for convenient transportation.
For more information, pls contact GN solids sales.

Recently GN solids control shipped 10 units of VFD decanter centrifuges to Middle east with IEC explosion proof motor and VFD control panel, these are high configuration decanter centrifuge, which can be widely used for dewatering unit, drilling fluids treatment, drilling cuttings treatment, waste water treatment, oil sludge separation system and all other kinds of liquids and solids separation.


The decanter centrifuge package including screw pump, telescopic skid, decanter centrifuge and VFD control panel, all in one skid for convenient transportation and operation.
Features of GN VFD control panel:


1) Positive pressurized VFD control panel with PLC smart control, with self cooling system and HMI interface, 3 motors VFD for main motor, back drive motor and feeding pump motor.
2) The motor and control panel is IEC EX certified for zone 1 application, suitable for operation temperature -20-55℃, especially suitable for Middle East area.
3) The inverter is ABB brand, and all the electrical components are option for ABB/ Scheneider/ Siemens.
4) The VFD control cabinet is made of stainless steel material for longer working life and better corrosion resistance.
5) The cable gland, power supply pin and aviation plug are all IEC EX certified.
Features of GN decanter centrifuge mechanical part:


1) Bowl material is made of duplex stainless steel 2304 or SS2205, the other parts of bowl is made of SS316, the collection box is also made of stainless steel 304 for better corrosion resistance.
2) The screw is made of stainless steel material and heating treatment up to 1000 degree, the opening screw propeller increase the treating efficiency.
3) The bearing is SKF brand
4) The screw protection is tungsten carbide tiles and repairable, the solids discharge port and fluids distribution port are all protected by tungsten carbide alloy and it is interchangeable.
For more information, pls contact with GN solids control.

As the reliable manufacturer of hydraulic drive decanter centrifuge in China, GN solids control recently shipped several units of Full Hydraulic Drive decanter centrifuge with feeding pump to Middle East, together with over 80 units of centrifugal pumps.


When we start production in the second factory in Dachang Chaobai River Development area, we introduced one batch of advanced machine to produce decanter centrifuge and vertical cuttings dryer, also for the centrifugal pump. We have high speed balancing machine, low speed balancing machine for balancing of centrifuge bowl. We can produce decanter centrifuge with 9 inch bowl, 14 inch bowl, 18 inch bowl, 22 inch bowl, 30 inch bowl for option, we have fixed speed centrifuge and VFD decanter centrifuge for different applications, also when used in high temperature weather area, for heavy drilling fluids, the user will need full hydraulic drive decanter centrifuge, compared with VFD decanter centrifuge, the hydraulic drive centrifuge is much easier to adjust the differential speed to reach better performance of the centrifuge treatment.


The feeding pump of the decanter centrifuge is positive displacement pump made by Germany Netzsch, it works steadily to feed the drilling fluids to the decanter centrifuge, the speed of the pump motor could be adjusted by PLC smart system so that the feeding flow rate will be controlled according to the client’s requirement.


4. The centrifugal pumps are widely used to transfer the drilling fluids, waste sludge, dredging slurry, oil sludge, etc. different materials and industry waste water. The major wear parts of the centrifugal pump is pump casing, impeller, the material of impeller and pump casing made by GN solids control is hard ductile iron alloy for longer working life and better wear resistance.
For more information about the full hydraulic drive decanter centrifuge, pls contact with GN solids sales.

GN solids control welcome our clients to take the sample materials to our facility to test by our decanter centrifuge, this is to let the client to know exactly the separation result clearly, and the operation method communication, this is a good way for the client to “watch the factory and watch the testing” before order.


GNLW224D mini decanter centrifuge is widely used to treat mining waste water recovery, industry waste water treatment, chemical slurry separation, animal waste separation, etc. projects. It is a single motor decanter centrifuge with VFD control panel, we can control the flow rate of the Netzsch brand screw pump by adjust the frequency of the motor, and set different differential speed to treat different fluids. The smaller of the differential speed, the drier of the discharged solids, the more clear of the discharged water. When increased the feeding flow rate, the discharged water might be less clear, the solids moisture is also increased. The max speed is 4500rpm, typical speed is 3800 rpm and the max G force is 2492G.


GNLW224EP-VFD is much better to treat the industry waste water, it is a 2 motor decanter centrifuge with main motor and back drive motor with VFD control panel. The smallest differential speed can be adjusted to 1 rpm, this can promise the discharged water very clear to meet the client’s requirement, and the solids moisture can also meet the limit. The max speed is 5000rpm, typical speed is 0~4500 rpm and the max G force is 3077G. The high G force ensures the better separation of the fine solids.