Month: November 2020

2 sets of drilling waste management system are shipped to Africa for oil based drilling cuttings treatment.

The screw conveyor as drilling waste transfer system to transfer the oil based drilling cuttings to vertical cuttings dryer top open port. The working principal of the vertical G dryer is that the screen basket traps wet solids and accelerates up to 900rpm with max 420G. The fluids passed through screen basket opening, the solids extracted by flights which is installed on the cone, the cone rotate slower than the bowl. The flights are protected by tungsten carbide alloy for abrasion resistance, the gap between the screen basket and bowl for proper operation. The screen basket opening with option as 0.35mm, 0.5mm, 0.25mm, the most popular screen opening is 0.5mm, the smaller screen opening will be very easily blocked. So the internal high pressure air knife is used to flush the screen basket regularly. The independent oil lubrication system is used to lubricate the bearing system via oil pump, from top to bottom flow back to oil tank via oil return pipe.

The components including flights, rotor, screen basket, bell jar, 55KW main motor, control panel, lubrication system, upper shell, feeding hopper, filter unit, cushion, mud block plate, distribution plate, solids discharge trough, oil return pipe, motor pulley with belt, oil tank, etc.

The high speed decanter centrifuge and VFD decanter centrifuge is installed on the telescopic skid to separate fine solids from the drilling fluids, the treated fluids can be recovery and reused to prepare new drilling fluids, the customer can save money through drilling waste disposal cost reduction, drilling fluids recovery, waste transportation cost reduction. The GNLW363-VFD decanter centrifuge with max G force up to 3063G, the max speed is up to 3900rpm, the normal working speed is 3200rpm, the screw pump installed on the package skid as decanter centrifuge feeding pump.

Recently one batch of centrifugal pump and jet mud mixers are ready for shipment to our international clients. The C series centrifugal pump has been used as transfer pump, mixing pump, charging pump, trip pump, feeding pump for different applications, such as oil & gas drilling solids control system, drilling waste management system, oil sludge treatment system, industrial waste water treatment, solids liquid separation system, chemical mixing unit, etc. As transfer pump, GN centrifugal pump can be used to transfer drilling fluids, oil sludge, drilling waste, waste water, waste sludge, etc. materials. The features of GN centrifugal pump including:

1. pump casing and impeller material is hard ductile iron alloy, which is abrasion resistant material to improve working life.
2. Bearing from FAG brand for improve working life.
3. Centrifugal casting skid instead of welding skid to reduce vibration and provide reliable operation, so that the whole pump and motor life can be extend.
4. With different motor and impeller size, different head, the different flow rate can meet client’s different requirement. The jet mud mixer is a combination of centrifugal pump, mixing hopper, pipelines, valves, flexible connector, control panel. It is an ideal unit for chemical mixing, mud mixing with compact footprint and flexible connection. The mixing hopper is venturi type mixing hopper with 4 inch and 6 inch size for selection, combination with different model centrifugal pump, the mixing rate is different. The user can connect the jet mud mixer with client’s existing storage tank by flexible hose conveniently. GN own brand control panel can be installed on the jet mud mixer unit for convenient operation. If required, stainless steel material mixing hopper is available for corrosive material. The mixing hopper can be installed on top of mud tank for goods mixing performance.
5. 
   If you have requirement for mud mixing system, pls contact with GN solids sales for customized solution.

As one of GN solids liquid separation system, GN Hydrovac Slurry Treating System’s working principal is also solids and liquid separation. The main purpose is to get waste water recovered and dry solids collection, it can save cost for the customer by less water consumption, less waste disposal cost and earn more money from project. We have over 11 units of Hydrovac Slurry Treating System working in USA and Canada, the technical specs is more or less similar as below:

1. 1 sets of slurry collection hopper system, the general treatment capability for this hydro vac slurry treating system is to treat about 30 ~ 40 hydro vac truck loading every day. The special designed large hopper can accept slurry from 2 hydro vac truck at the same time, it will improve the treating efficiency of the whole system. The submersible slurry pump suck the slurry from collection hopper to coarse solids separation shale shaker.
2. 1 set of coarse solids separation unit, the coarse solids are separated out by 1mm size opening shaker screen, to protect the equipments in the next step and extend longer working life, the fluids drop into the catching tank. Another submersible slurry pump transfer the fluids to fine solids separation unit.
3. 1 set of fine solids separation unit, the 4 inch desilter cone separation cut point is 20 microns, the discharged fluids drop into the mud tank, the screw pump installed in the system will feed the fluids to decanter centrifuge for further treatment.
4. 1 set of decanter centrifuge package with chemical dosing unit, the decanter centrifuge mechanical separation cut point is 2~ 5 microns, by chemical jetting, the ultra fine solids can be separated out up to 1 microns, so the water recovery will be more clear, which can be reused or send to waste water treatment facility.

Recently we got repeat order for big bowl decanter centrifuge for TBM slurry dewatering in Singapore. The full package dewatering system with specification is as below:

1 unit of GNLW553C-VFD decanter centrifuge, non explosion proof motor and VFD control panel, with 22 inch bowl diameter, 71 inch bowl length, max ( design) speed is 3000rpm, typical bowl speed is 0 ~ 2500rpm, max G force is 2719G, typical G force is 0 ~1888G, separation cut point is 2~ 5 microns, differential speed is 0 ~45rpm, gearbox torque is 12000 N.M., gear box ration is 35:1, the main motor is 90KW, back drive motor is 37KW, pump motor is 22KW, the VFD control panel is positive pressurized control panel with PLC smart control, HMI touch screen.
The big bowl decanter centrifuge is installed on the catch tank and fitted into 20ft container with dewatering unit for water/ sun proof and convenient transportation. The user is satisfied with the previous ordered equipment performance and this is their repeat order for same project.
The Netzsch brand screw pump as decanter centrifuge feeding pump for continuously working to transfer the slurry to decanter centrifuge.

The features of GN big bow decanter centrifuge:
Duplex stainless steel 2205 material bowl material, the other components of the bowl cone is made of SS316L. The screw is made of SS304 by casting, the screw propeller is protected by tungsten carbide tiles which is repairable, the open screw propeller design increase the treating efficiency, the solids discharge port and fluids distribution port is protected by tungsten carbide alloy.

The dewatering centrifuge package is customized design for client’s special requirement, not standard design, we can provide customized design for other client’s requirement. The solids discharged from GN dewatering centrifuge is used to make construction bricks, the recycled water is used for TBM machine cooling.

One unit of GNLW554ET-VFD dewatering centrifuge is shipped to oil sludge treatment project in China this week. Dewatering centrifuge is special designed for waste water/ sludge treatment. The technical configuration is as below:

Model: GNLW554ET-VFD
Bowl diameter: 22 inch
Bowl length: 91 inch
Max speed: 3150 rpm
Max G force: 3051G
Bowl L/R Ratio: 4.2
Main motor: 90KW
Back drive motor: 45KW
Beach angle: 8.5 degree
Bearing brand: SKF
Bearing lubrication system: thin oil circulation oil station for heavy loading and high speed operation.
Drive system: VFD control panel with stainless steel material cabinet, CNEX, IEC EX or ATEX explosion proof standard can be selected. The constant torque control system, the automatic flushing and dosing system, the monitoring and alarm system can be installed on the VFD control panel as per client’s customized requirement.

The bowl material is made of duplex stainless steel 2205/ 2304 for better corrosion resistance, the other components are made of stainless steel 316L, the screw is made of duplex stainless steel 2205 by centrifugal casting, the screw propeller is protected by tungsten carbide tiles for longer working life, and it is repairable. The solids discharge port and fluids distribution port is protected by tungsten alloy.
The Netzsch brand screw pump is used as decanter centrifuge feeding pump for continuous working and convenient frequency adjustment and control the flow rate. The dewatering centrifuge is used to install ona fluids collection tank or telescopic skid.
Except for GNLW554ET-VFD dewatering centrifuge, GN SOLIDS CONTROL also produce GNLW553C-VFD, GNLW554EP-VFD decanter centrifuge with 22 inch bowl, we can also produce 9 inch, 14 inch, 18 inch, 22 inch, 30 inch bowl decanter centrifuge for different applications, as drilling fluids treatment, drilling waste management system, waste water treatment, oil sludge separation system, dredging slurry separation system, mining tails treatment, etc. project.