screw pump

Recently GN solids control shipped 3 package of dewatering centrifuge unit to Europe client, the configuration is as below:


3 sets of GNLW224EP-VFD decanter centrifuge
3 sets of dewatering unit
3 sets of centrifuge feeding pump ( positive displacement pump) installed on the fluids collection tank.
The working principal of 1 package of dewatering centrifuge unit is as below:


The screw pump feed the fluids to VFD decanter centrifuge, in the meanwhile, the chemical is mixed by dewatering unit and the chemical dosing pump transfer the chemical to decanter centrifuge feed tube, so the solids can be separated out easily with chemical mixing and collected by cuttings box, the fluids will drop down into the fluids collection box for reuse or send to further waste water treatment. The discharged water is clear enough since most ultra fine solids are separated out.
GNLW224EP-VFD decanter centrifuge is a 9 inch bowl mini decanter centrifuge with bowl length 36.4 inch, the bowl length is longer than GNLW223 series centrifuge with longer clarification segment, the discharged water will be more clear with the longer bowl cone. The max bowl speed is 5000rpm, typical bowl speed is 0 ~ 4500 rpm, with max G force is 3077G, typical G force is 2492G, the main motor is 11KW, back drive motor power is 5.5KW, the gearbox ratio is 95:1, gearbox torque is 1400 N.M.


The VFD control panel controlled the main motor, back drive motor and feed pump motor frequency, the Germany Netzsch brand screw pump work steadily to the decanter centrifuge, the fluids touch part is wear resistance alloy iron.
Except for 9 inch bowl decanter centrifuge, we also provide dewatering centrifuge package with other size decanter centrifuge, including 14 inch bowl, 18 inch bowl, 22 inch bowl, 30 inch bowl with different model dewatering unit and feed pump.

Recently 2 sets of drilling waste management equipments are shipped to Africa, including 2 units of vertical cuttings dryer, 2 sets of waste treatment decanter centrifuge, 2 units of screw pump, 6 units of screw conveyor,
The standard drilling waste management system configuration is as below:


1 ea vertical cuttings dryer
1 ea VFD decanter centrifuge
1 ea screw pump as centrifuge feeding pump
1 ea vertical cuttings dryer flushing pump
1 set of cuttings dryer skid and 1 set of decanter centrifuge telescopic skid
1 set of intermediate tank to collect discharged fluids from vertical cuttings dryer


Several units of screw conveyor to transfer the drilling waste to vertical cutting dryer top open feeder port. One unit is horizontally installed to collect drilling waste, one unit is slantly installed to collect drilling waste from the first unit screw conveyor discharge port. The complete package of drilling waste management system is designed as standard container loading size and for convenient transportation.
The vertical cuttings dryer is ideal equipment to treat the oil based drilling waste, the discharged solids with oil content on the cuttings is below 5%, if the discharged solids with higher moisture, the user should check the screen basket status through watching port, if the accumulated solids is already blocking the screen opening, it should be flushed by the high pressure air knife regularly, otherwise the treated solids will be with high moisture, the main motor will be continuously stopped because of over currency.


The VFD decanter centrifuge can separate the fine solids from the vertical cuttings dryer discharged fluids, the cut point is 2 ~5 microns, by adjusting the pump frequency, the user can adjust the feeding rate conveniently. The positive pressured VFD control panel with stainless steel cover, PLC smart control, HMI interface, world famous brand universal VFD inverter.

One set of waste water decanter centrifuge with chemical dosing unit to Middle East for waste water treatment project. The technical configuration is as below:


1 set of GNLW454-VFD decanter centrifuge, the centrifuge bowl diameter is 450mm, centrifuge bowl length is 1890mm, designed capacity is 400gpm, max bowl speed is 3500rpm, normal working speed is 0 ~3200rpm, max G force is 3084G, the mechanical separation cut point is 2 ~5 microns, the differential speed is 0 ~ 45 rpm, gearbox torque is 7500N.M., with gearbox ratio is 57:1, the main motor power is 55KW, back drive motor is 22KW, pump motor is 15KW. The bowl material is made of duplex stainless steel 2205 or 2304, the other bowl is made of stainless steel 316L.the bearing is SKF brand, the screw propeller is protected by tungsten carbide tiles. The solids discharge port and fluids distribution port is protected by tungsten carbide alloy.


The VFD control panel drive the decanter centrifuge main motor, back drive motor and pump motor. The pump flow rate can be controlled by adjust pump motor frequency. Except for GNLW454-VFD decanter centrifuge, we also produce 18 inch bowl decanter centrifuge with shorter length as GNLW453-VFD, which can be used for drilling fluids treatment, drilling waste management, oil sludge treatment and other kind of slurry separation. The other decanter centrifuge models including 9 inch bowl centrifuge GNLW223D, GNLW224-VFD; 14 inch bowl centrifuge GNLW363-VFD, GNLW364-VFD; 22 inch bowl centrifuge GNLW553-VFD, GNLW554-VFD; 30 inch bowl centrifuge GNLW764-VFD, etc. We can also provide customized dewatering centrifuge solution for their special requirement.


1 set of chemical dosing unit, including 3 compartment tank , hopper, agitator, level meter, auger conveyor, piping system, PLC smart control, 2 units of chemical dosing pump, pressure gauge, valves, skid, etc.
1 set of screw pump as centrifuge feeding 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.