Desander Desilter

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.

One batch of jet mud mixer and vertical cuttings dryer are ready for shipment to our client in China.

The jet mud mixer is consist of mud mixing hopper and mud mixing pump, pipelines, valves, electric control panel on the oilfield skid, the mud mixing package can be easily connected with client’s old mud tank by flexible hose. The mixing hopper can be installed on top of mud tank, and install the mixing pump on the tank skid for better mixing efficiency.
Except for jet mud mixer, GN also produce other solids control equipments like shale shaker, mud cleaner, desander, desilter, vacuum degasser, centrifugal degasser, decanter centrifuge, mud gas separator, shaker screens, mud agitator, mud gun, centrifugal pump, submersible slurry pump, mud tank and flare ignition device. If you have requirement for a complete solids control system and mud recycling system, pls contact with GN solids control.

Vertical cuttings dryer is the core equipment for drilling waste management system, it is mainly used for oil based drilling cuttings treatment. The complete drilling waste management system for oil based drilling cuttings treatment including 1 ea vertical cuttings dryer, 1 ea decanter centrifuge, 1ea decanter centrifuge feeding pump ( screw pump), 1 ea flushing pump ( screw pump), telescopic skid for vertical cuttings dryer, telescopic skid for decanter centrifuge, complete package skid with intermediate tank, pipelines and accessories. The screw conveyor is installed horizontally to pick up drilling cuttings from solids control equipments, another unit is installed slantly to transfer the drilling cuttings to vertical cuttings dryer, the cuttings box or another unit auger to pick up the discharged solids and transfer to other place.
The fluids discharged from vertical cuttings dryer will flow to intermediate tank and the screw pump feed the fluids to decanter centrifuge for further treatment, the separation cut point is 2~5 microns.

As professional manufacturer of decanter centrifuge and sludge transfer pump in China, GN solids control can design complete waste water treatment system and supply single equipments to our target clients like environmental engineering company, so that they can make a mud tank system with accessories locally for less freight cost and importation cost.

Recently we shipped 2ea mini decanter centrifuges with centrifugal pump and sludge vacuum pump to our client environmental engineering client in the world. The 9 inch decanter centrifuge is the smallest model we can produce, we also have 14 inch bowl decanter centrifuge, 18 inch bowl decanter centrifuge, 22 inch bowl decanter centrifuge, 30 inch bowl decanter centrifuge for different industry. We have GNLW223D series with bowl length 26.4 inch, the ratio is 3, the max G force is 2492G, the max bowl speed is 4500rpm, the normal working speed is 3800rpm. GNLW224 series decanter centrifuge with ratio 4, the bowl length is 36.4 inch, the max speed is 5000 rpm, the normal working speed is 0 ~4500rpm, the max G force is 3077 G. We will select proper model decanter centrifuge for client’s different projects.

Normally we use screw pump as ideal feeding pump of decanter centrifuge, sometimes due to space limit and other consideration, we also use centrifugal pump and submersible slurry pump as centrifuge feeding pump, compare with screw pump, the slurry pump ’s flow rate can not be controlled by adjust the pump motor frequency, it can be adjusted by valves and installed a flow meter on the pump outlet, but the maintenance cost is cheaper, especially when solids content is very high, so the impeller and pump casing material should more abrasion resistance material.

Vacuum pump is used to transfer different types sludge, like industrial waste sludge, oil sludge, drilling cuttings, drilling fluids, etc.

Recently GN solids control shipped one set of CBM mud recycling system for coal exploration company. The technical configuration is as below:

1) Linear motion shale shaker 2 units: 3 panel shale shaker GNZS703F installed with 3pcs composite material frame shaker screens, we can produce API 20 to API 325 comply with API RP13C standard. Possum belly for the 2 units of shale shakers to collect sludge from drilling rig and distributor to 2 units shale shaker buffer box evenly. Each shale shaker is drived by 2 ea of Italy Oil brand vibration motors, GN own produced explosion proof starter is installed on the shale shaker. The function is to separate coarse solids from the coal slurry.

2) Desander with mini bottom shaker and centrifugal pump, 1ea of 10 inch desander cone installed on top of bottom shale shaker, the separation cut point is 45 microns
3) Desilter with mini bottom shaker and centrifugal pump, 8ea of 4 inch desilter cone installed on top of bottom shale shaker, the separation cut point is 20 microns

4) Mud tank system with tank accessories, as mud agitator, mud gun, walkway, handrails, stairs, pipelines, man hole, electric control system, clean gate, high position valves, we will design customized tank dimension according to the required capacity and installed equipments
5) Jet mud mixer, which is composed of mixing hopper, mixing pump, pipelines, valves and control panel on one skid.
6) Middle speed decanter centrifuge for barite recovery, the working speed is 1800rpm, the separation cut point is 5 ~7 microns.
7) One unit of slug tank with mud agitator are lay on the tank
GN solids control can design and produce solids control system / mud recycling system for oil & gas drilling, CBM, HDD, pls contact with GN solids sales for more information.

One unit of solids liquid separation system and one decanter centrifuge package to Europe client. The solids removal unit can be widely used for mining core drilling waste water treatment. The separation cut point is 2~5 microns, the recycled water can be re-used for drilling, the user will save drilling cost, less water consumption, less waste produced.

The submersible slurry pump is picking up to transfer the waste sludge from pit to the solids liquid separation system shale shaker. The shale shaker is used to separate big solids and reduce solids content, the GNLW223-VFD decanter centrifuge is to separate fine solids bigger than 2 microns, the screw pump as feeding pump of the VFD decanter centrifuge, the flow rate can be adjusted by changing the frequency of the pump motor, it will be controlled by the decanter centrifuge VFD control panel. All of these equipments are installed on top of the mud tank with tank accessories.

The decanter centrifuge package GNLW224E is extra required, the discharged water is more clear since the bowl length is longer than GNLW223 series decanter centrifuge. Both of the bowl diameter is 9 inch ( 220mm), the bowl length of 223 series is 670mm, the bowl length of 224 series is 924mm, the ratio of 223 series is 3, the ratio of 224 centrifuge is 4.2, the fluids can be treated better and get more clear water.

9 inch bowl decanter centrifuge is the mini centrifuge among GN decanter centrifuges, we can also produce 14 inch bowl, 18 inch bowl, 22 inch bowl and 30 inch bowl decanter centrifuge with different bowl length, different rotation speed, different G force and different treating capacity for your various applications. If you need a waste water treatment solution and customized separation system, pls contact with GN solids sales.

Recently GN solids control shipped 4 units of desander units to domestic HDD contractor, the desander unit is also called economic mud cleaning system, which can be widely used for mud cleaning of TBM, Piling, micro tunneling, pipe jacking, HDD, etc. civil engineering works. With different treating capacity, we have GNMS-200B, GNMS-500D, GNMS-1000D for option. If the client need mud mixing and storage, they need to prepare for extra jet mud mixer connected with their storage tank as mixing and storage tank. The submersible slurry pump is installed vertically on top of mud pit to transfer the waste sludge to the desander unit. The composite material frame shaker screens on both top later and bottom layer of the double deck shale shaker is utilized for longer working life and reduce screen replacement time.

With economic cost, small footprint, compact design, easy operation, the desander unit is very popular for trenchless engineering companies. Normally a desander unit including a double deck shale shaker with proper qty hydrocyclones, 1 centrifugal pump, one catch tank to pick up the treated mud from first phase coarse solids separation shaker screens, the clean mud from hydrocyclones will flow to storage tank directly through pipelines.

For 200gpm mud cleaning unit, the hydrocyclone is 4 ea 4 inch desilter cone. For 500gpm mud cleaning unit, the hydrocyclone is 1 ea 10 inch desander cone, for 1000 gpm desander unit, the hydrocylone is 2 ea 10 inch desander cone, the centrifugal feeding pump model will be changed accordingly. All of the economic desander unit is a 2 phase cleaning unit, if the user need 3 phase cleaning unit, we will recommend our standard or customized design high configuration mud recycling system.
The operation cost of the desander unit is very low, the critical wear parts including pump impeller, seals, bearings and shaker screens, hydrocyclones.

One batch of VFD decanter centrifuge and screw conveyor are ready for shipment to waste water treatment company. As one of the professional manufacturer of decanter centrifuge in China, GN Solids Control can produce different size decanter centrifuges from 9 inch, 14 inch, 18 inch, 22 inch, 30 inch bowl diameter for different applications, including industrial waste water treatment, mining tailing treatment, dredging slurry separation system, HDD & construction waste slurry treatment, oil & gas drilling mud and drilling cuttings treatment, oil sludge treatment unit.

To transfer waste slurry with high solids content, 3 ways can be selected, screw conveyor system, sludge vacuum pump unit, drilling cuttings transfer pump. The screw conveyor is the traditional equipment to transfer waste slurry with continuous working. Each section standard length is 12ft, we can provide 12ft, 24ft, 36ft, 48ft length screw conveyor for option. The sludge vacuum pump is 100% air operated pump without electricity power supply, the discharge distance is up to 1000m, the suction distance is up to 50m, the max solids content is up to 80%, and max solids size is 75mm. The pressure required is 80 ~114 PSI, and air demand is 17m3/ min （600CFM）， the user should prepare the air compressor to supply air.
GN decanter centrifuge features as below:

1) Centrifuge straight bowl material is made of duplex stainless steel 2205 or 2304 by centrifugal casting, the cone section is made of stainless steel 316L, which is much better than other’s material SS304. The centrifuge collection box is made of SS304.
2) The screw is made of stainless steel 316L, and the impeller is protected by tungsten carbide tiles for longer working life, it is repairable once damaged. The open impeller design will increase the treating efficiency and separation performance.
3) The bearing is made of SKF brand for reliable operation.