Author: gnadmin

Recently one batch of Kuwait safety standard screw conveyors are ready for shipment to Kuwait drilling company. The unique features of the screw conveyor are as below:

1. Required steel grating cover plate for safety.
2. Required HSE safety signs.
3. Required full length Safety Grab Wires along the auger for emergency stop;
4. Required water spray system to prevent the screw conveyor from blocking.
5. Required design for preventing collapse on the steel grating cover plate
6. 
   The screw conveyor is a continuous conveying equipment to transfer drilling fluids and drilling cuttings, it can be installed horizontally and inclined, to collect drilling cuttings from primary shale shaker and transfer to high G drying shaker or vertical cuttings dryer, it will also transfer the discharged solids from decanter centrifuge and vertical cuttings dryer.
   The screw conveyor can be made into different length, each section with standard 12ft length, total length as 2 sections 24 ft, 3 sections 36ft, 4 sections 48ft. the rotating screw diameter with 10 inch, 12 inch, 14 inch, 16 inch, 18 inch. The sections are connected by hanging bearing and shaft assembly.
   The screw flights are spray with wear resistant coating to prolong its service life. The reinforced frame outside the screw conveyor provides high strength to the complete conveyor, and the bearing is world famous brand NSK or FAG for longer working life. The shell cover plate is installed with rubber sealing gasket, which can prevent dust leakage during operation.
   We can provide fixed speed screw conveyor or variable speed screw conveyor, we can also provide CNEX, ATEX or IEC EX explosion proof standard.
   Except for screw conveyor, GN also provide sludge vacuum pump for drilling waste and other slurry transfer, if you need a drilling cuttings transfer system solution, pls contact with GN solids control.

Recently one set of GNOST-15B oil sludge treatment equipments are ready for shipment for Middle East company, it consists of modules as below:
1. Transfer module: it suck the oil sludge and transfer to primary coarse shaker separation module to separate big solids.
2. Coarse shaker separation module: Classification Vibrating Screen GNLMP1236
3. Crusher module: to break the big solids into smaller piece, for easier separation of solids and transfer to pre-mixing tank.

4. Pre-mixing tank module: 2 units, the dimension is equivalent with 20ft container, the pre-mixing tank equipped with heating lines, mud agitator, submersible slurry pump, the user can use demulsifier or oil sludge surfactant according to the oil sludge conditions.
5. Fine solids screening module: oil sludge separation shale shaker GNZS706, which is a double deck shale shaker, the top layer screen is to separate the bigger solids, and the bottom layer screen is to separate the fine solids.

6. Solids liquid separation module: GNLW553D-VFD decanter centrifuge, adding with flocculants, the treating capacity of oil sludge is up to 20m3/h, to separate fine solids from the oil water mixture. The bowl diameter is 22 inch, the bowl length is 71 inch, the max speed is 3000rpm and max G force is 2719G. When use it to treat drilling fluids, max treating capacity is up to 500gpm.

7. Oil water separation module: GNSD-125 3 phase disc separator, to separate the oil, water and few solids, if necessary, proper demulsifier can be added for easy separation of oil and water, the oil can be recovery and water can be sent to waste water treatment facility or reused in the circulation system.
8. Chemical dosing unit: to prepare for oil sludge demulsifier, Oil sludge surfactant, flocculants.
It is customized oil sludge treatment system according to client’s requirement, if you need a oil sludge treatment solution, pls contact with GN solids.

Recently one batch of separation equipments for dredging slurry separation plant to North America, the equipments list including:

GNLW764A big bowl decanter centrifuge, 2 units, the centrifuge bowl diameter is 30inch, and bowl length is 131 inch, the max speed is 2650rpm, the max G force is 3000G, the max treating capacity is 285m3/h, the typical capacity is 225m3/h, the dewatering capacity is 50m3/h, the main motor is 160KW, and back drive motor is 90KW.

GNZS706F double deck shale shaker, 2 units, top layer with 3pcs screen, 750x900mm; bottom layer with 3pcs screens, 700x1250mm, the total screen area is 4.63m2. 2ea vibration motor 1.94KW drived the double deck shale shaker and produce up to 7.3G vibration force. The vibeation mode is linear motion , the reference treating capacity for drilling fluids is 140m3/h ( 616gpm). The deck angle can be adjusted from -1° to +5°, we can provide CNEX or ATEX or IECEX explosion proof standard for option. The flowrate mentioned is for reference only. The double deck shale shaker can treat the slurry better compared with single deck shale shaker, the slurry will drop into the top layer screen firstly to separate coarse solids, then the bottom layer screen with fine mesh will separate the fine solids, the treated fluids drop into the mud tank. The centrifugal pump feed the slurry to desander, the separation cut point is 45 microns.

GNZS703F-2S desander, 2 units
GNZS703F-12N desilter, 2 units, the fluids treated by desander dropped into the mud tank and the desilter centrifugal pump feed the fluids to desilter , the separation cut point is 15 microns.
Screw conveyor, 12 sets, it is used to transfer the dredging slurry and transfer the discharged solids to cuttings box.

Mud tank and feeding pumps
For more information of dredging slurry separation equipments, pls contact with GN separation.

Recently one unit of GN stack vibrating screen are used for Iron core separation and treatment.
GN stack vibrating screen is suitable for wet screening, classification and dehydration treatment of fine grained materials in mineral processing, coal preparation.

This unit with 2 layers screening, 2 vibration motor (normally from US Martin or Italy Oil brand ) drived the vibrating screen as linear motion. The features of the stack vibrating screen is high screening screen, energy saving, low energy consumption, large processing capacity, simple structure for simple operation, stable and reliable operation, small footprint, low maintenance cost. It installed polyurethane material screen, which is abrasion resistance and longer working life,and it is not easily blocked due to the good elasticity. The shaker deck surface treatment by sandblasting process, heavy anti corrosion paint for good anti corrosion performance.
The main structures of stack vibration screen including vibration motor, polyurethane screen, support frame, rack assembly, receiving chute, screen box, feed box, water spray system.
The total screen deck layer is 2, and total screening area is 4.2m2, total power is 2 x 1.84KW, vibration frequency is 25HZ, screen inclination angle is 17.5 degree, the mesh size opening is 0.045mm to 2mm, each screen dimension is 700x1250mm, each shaker with 6pcs screens. The dry ore discharge capacity is 5 ~12m3/h. Except for 2 layers screen deck, we can also produce 3 layers screen deck, 4 layers screen deck, 5 layers screen deck.

Except for stack vibrating screen, GN separation also provide high frequency vibrating screen, dewatering vibrating screen, classification vibrating screen, large linear vibrating screen, large Banana vibrating screen, large flip flow vibrating screen. The polyurethane screens are also produced by GN solids control, for better delivery time and adaptability. If you need a solution for vibrating screen, pls contact with GN separation for more information.

Recently one unit of oil sludge treatment decanter centrifuge with screw conveyor are ready for shipment to overseas client.

The model of oil sludge treatment decanter centrifuge is GNLW554ET-VFD, the VFD decanter centrifuge technical specification is as below:
Bowl diameter is 22 inch, the bowl length is 91 inch, the max speed is 3150rpm, the max G force is 3051G, the typical speed is 2800rpm, the typical speed is 2412G, the max treating capacity for water is up to 600gpm, and the typical capacity is 475gpm, when used for oil sludge treatment, the capacity with chemical additives is 88 gpm, with main motor 90KW and back drive motor 45KW. The treating capacity will be different based on different materials. Not only for 22 inch bowl centrifuge, GN also produce 9 inch bowl, 14 inch bowl, 18 inch bowl, 30 inch bowl decanter centrifuge for different applications, for 22 inch bowl diameter, we also have GNLW553-VFD centrifuge for oil sludge treatment. Their bowl length and cone angle is different which is designed as per treatment target. Necessary chemicals should be added to improve the separation efficiency of oil, water and solids.

The screw conveyor is used to transfer the discharged solids from centrifuge discharge trough to waste collection box, also it can be used to transfer drilling cuttings and other type fluids. The screw flights are made of wear resistant and thicker manganese steel, also the sprayed wear resistant coating can be optional for longer working life. The reinforce frame provide high strength to the complete screw conveyor for better installation. NSK OR FAG brand bearing provide longer service life, and the bearing seat is made of aluminum casting for steady working.
If you need oil sludge treatment decanter centrifuge and complete oil sludge treatment system, pls contact with GN solids control.