Decanter Centrifuge

GN Solids Control finished the final inspection and assembly of 5 packages of solids control equipment. They will be equipped for 5 sets new 2000 HP deep oil drilling rigs. The solids control equipment will be shipped to the client soon to commission together with their new drilling rigs.

All the equipment are customized for an old client from Nigeria. Since the first time they bought from GN Solids Control in 2012, till now, they deal with GN Solids Control over 10 years. And up to now, the all their deep drilling rigs are all running with GN Solids Control equipment for drilling mud and drilling cuttings treatment. For each 2000HP deep drilling rig, the client uses a fixed speed decanter and a VFD centrifuge for drilling mud treatment. And a vertical cuttings dryer for drilling cuttings treatment, and other accessories equipment.

The 5 packages solids control equipment include following items:

1) 5 sets fixed speed decanter centrifuge. Each fixed speed centrifuge will come together with another set of pulley and belt. While changing the pulley and belt, clients can run the centrifuge at another fixed speed. Normally GN Solids Control offer 3200 RPM and 2700RPM pulley and belt for high speed decanter centrifuge. Clients can contact GN Solids Control in case they need other speeds.

2) 5 sets VFD centrifuge. The VFD panel are equipped with Air conditioner cooling system for high ambient areas. And there are 3 VFD control inside the VFD control panel for variable speed control on main drive motor, back drive motor, as well as pump motor.

3) 5 sets vertical cuttings dryer for oil base mud treatment.

4) 40 sets screw conveyors. It is 10 inch diameter augers to fit for drilling mud solids control equipment and drilling waste management equipment.

5) Various screw pump to feed for decanter centrifuges and as flush pump for vertical cuttings dryers.

6) All above equipment will come together with relative control panels.

This week, GN Solids Control is assembling 2 sets of mud cleaning system for SINOPEC HDD rigs. The 2 mud cleaning system are designed for different size HDD rigs, one system is with 1000GPM handling capacity, while the other one is designed for 500GPM handling capacity.

500GPM mud system is the most popular size SINOPEC bought from GN Solids Control. Till now, they have over 30 sets mud recycling system from GN Solids Control for their international HDD and piling projects.

The 2 mud recycling system are painted with clients’ special requested color. GN Standard color is green, while the SINOPEC system is yellow. The 500GPM mud system is equipped with very high standard. It is composite with all the 4-stage solids control equipment for drilling mud treatment.

1. The 1st stage solids control equipment shale shaker. There is a 3-panel shale shaker which is with big screen areas for capacity up to 500GPM. The shaker model is GN703F, which is the most hot sale shale shaker made by GN Solids Control.

2. The 2nd stage solids control equipment desander, and the 3rd stage solids control equipment. It is a 3-in-1 mud cleaner which is composite of a big area underflow shale shaker GNZS703F, and 1×10 inch desander cone plus 8×4 inch desiltere cone.

3. The 4th stage solids control equipment decanter centrifuge. There is a 18 inch middle big bowl centrifuge. The centrifuge model is GNLW452D. It is a big bowl centrifuge but it is middle speed, The GNLW452D is an economic centrifuge model with big bowl but middle speed. So it is widely used in HDD, CBM, water well drilling and other trenchless rigs.

Besides mud recycling, GN Solids Control 500GPM mud recycling system also have the function of mixing. It can continue prepare quality new mud for the mud system. The mixing pipelines are connected to all mud tank compartments. So operators can choose to mixing from any of the tank compartment.

Last week, GN Solids Control finished a set of decanter centrifuge and sludge & solids vacuum pump for an Environmental Solution Company.

The centrifuge is a 2-phase decanter centrifuge which can be used for separation oily sludge and non-oily sludge.
When the material feed to decanter centrifuge, the solids particles should be separated by GN Solids Shale Shaker to achieve correct particle size. Suitable API screen size should be chosen during the separation to achieve the separation result.

And the solids content before enter into decanter centrifuge should be less than 15%. It can be achieved by heating and dilution during pre-mixing stage. GN Solids Control can offer the pre-mixing tank which is equipped with heating pipes, agitators, slurry transfer pump and electrical control system for dilution and mixing. Operators can also prepare it at jobsite.
And plus, the Solid material density inside the oily sludge should be higher than liquid material. In this situation, after heating and flocculation, the solid phase can settle naturally or can be separated by lab tube centrifuge.

The output after 2-phase decanter centrifuge is solids phase and oil & water & soil mixture. So after 2-phase decanter centrifuge, 3-phase decanter centrifuge or disc centrifuge can be used to further clean the water, oil and soil.

The vacuum pump has a wide range application at waste management jobsite. The pump can suck slurry and feed the system. GN Solids Control vacuum pump can be used for liquid, solids and sludge transfer. The vacuum pump model used for the environmental solution company is a small size model GNSP-10, it is the smallest size vacuum pump made by GN Solids Control. GN Solids Control can offer another set of suction pipe and ahead, so this case, the mini vacuum pump can be used as an industry vacuum cleaner to clean the spilled mud on mud tanks or on the ground.

GN Solids Control makes various sizes and various standards centrifuges to meet for oil and gas drilling, no-oil drilling mud treatment, as well as industry waste separation.

In many cases, clients contact GN Solids Control sales team to ask for prices of GN centrifuges. They said their choice of centrifuge will depend on the characteristics and the price for this they want GN Solids Control to send them a draft quotation for all types of centrifuges.

Actually, it is impossible to quote prices if without the details information of the project or clients request on the separation centrifuges. Some of the reasons are that, GN Solids Control makes various types decanter centrifuge for oil gas drilling, slurry separation and industry separation.

GN Solids Control need the project information and clients’ request on the decanter centrifuge, then GN sales engineer can recommend clients suitable model with necessary standards.

Prices cannot be quoted without project information. As even for the same centrifuge model, price will vary much for different standard while treating different materials, like for the VFD centrifuges, for a same model, there are Explosion proof zone 1 and zone 2 for hazardous areas, there are CNEX, ATEX, and IECEX explosion proof standard for various market request. For the positive pressurized VFD control panel, there are 3 VFD or 2 VFD control panel per different field request. There are vortex tube cooking system and air conditioner cooling type VFD panel to suit for different ambient areas.
You can visit our website for information. And also there are non-explosion proof decanter and VFD panel for safety areas. Clients can choose the suitable standard based on his job site situation and his budget.

GN Solids Control website show some general centrifuge models for clients’ information.
https://www.gnsolidscontrol.com/decanting-centrifuge 

https://www.gnsolidscontrol.com/industry-centrifuges 

Below are some general questions about centrifuge separation, but not limited to below:

1) Before entering into decanter centrifuge, where is the material coming from, and what treatment it have been down?

2) what is the solids & liquid percentage, and max. particle size before enter into centrifuge?

3) What kind of solids and liquid output you want to reach after centrifuge separation?

4) Handling capacity of centrifuge you want to reach?

and other information you can offer.

GN Solids Control high speed decanter centrifuge is widely used for low gravity drilling mud solids control (LGS). The most popular size decanter centrifuge for drilling mud solids control system is 14 inch bowl.

There are mainly 3 applications of decanter centrifuges using in drilling mud solids control system.

Firstly, middle speed decanter centrifuge is used in drilling mud solids control system for HGS (High Gravity Solids).

Secondly, high speed decanter centrifuge are used to treat low gravity solids (LGS) removal.

The high speed decanter centrifuge and low speed decanter centrifuge are fixed speed control. GN Solids Control also make variable speed control decanter centrifuge which can fix for both high gravity solids removal and low gravity solids removal. Besides drilling mud solids control, GN Solids Control decanter centrifuge can also used for drilling waste management.

GN Solids Control decanter centrifuge standard color is green RAL6024. GN Solids Control can also make customized color per clients’ request. And GN Solids Control can put clients’ logo on equipment if they need.

Besides 14 inch decanter centrifuge, GN Solids Control makes other sides decanter centrifuge, includes but not limited to below models:

1. GN Solids Control makes 9 inch decanter centrifuge which are widely used in mining slurry separation. It is used together with mini size shale shaker and mixing hopper to complete as a solids removal unit (SRU).

2. GN Solids Control makes 18 inch and 22 inch decanter centrifuge for fine solids separation and dewatering treatment.

3. GN Solids Control makes the biggest size 30 inch decanter centrifuge for industry separation.

Besides various sides decanter centrifuge, GN Solids Control makes other liquid and solids separation equipment to offer turn-key solution to clients.

The major liquid and solids separation equipment GN Solids Control can offer: shale shaker, mud cleaner, desander, desilter, decanter centrifuge, mud agitator, …

Some transferring equipment GN Solids Control make: vertical slurry pump, centrifugal pump, screw conveyor, solids and vacuum transfer pump, …

Complete mud system GN Solids Control makes: various sizes solids removal unit and mud recycling system for various kinds of drilling activities, like for HDD, CBM, piling, pipe-jacking, etc…

GN Solids Control vacuum pump is mainly designed for solids and slurry transfer. With its special design, the vacuum pump can reach discharging distance up to 500m or 1000m, it’s up to the models clients choose. The big size vacuum pump can discharge to 1000m away, and the even the smallest model vacuum pump can reach up transfer distance 500m away.

Recently, GN Solids Control offered a mini size vacuum pump applied for tank cleaning works. The client will use the mini size vacuum pump to suck the waste slurry from deep tanks. The model of the mini size vacuum pump is GNSP-10B. It is the smallest size vacuum pump made by GN Solid Control. The biggest model is GNSP-10B.

After tank cleaning, the client choose a GN mini size decanter centrifuge to do the liquid and solids separation. After the separation, the client can reduce the waste liquid, recover more usable liquid and reuse the water. It is a 9 inch baby centrifuge with high speed and high G force for water treatment and slurry recover. GN Solids Control mini size centrifuge is widely used at Industry Waste Water Treatment plant and Diamond Core Drilling Fluids Treatment.

GN Solids Control major advantage is to offer full package tank cleaning treatment system and solids removal unit for mining industry, which will consist of shale shaker separator, desander / desilter, decanter centrifuge, feeding pumps, control panels, mud tanks, and skids to holding all items. Sometimes, the chemical dosing unit will be used together with centrifuge to ultra fine solids separation.

GN Solids Control sludge vacuum pump, also named as solids transfer pump. It is a pneumatic slurry transfer vacuum pump. The pump is widely used for liquid, slurry, powder and solids transfer. GN vacuum pump is a high vacuum loading solids transfer pump, so it can be used at tough environmental for solids or sludge transfer especially used to suck and transfer the high density and high viscosity oil sludge from waste pits generated by oil and gas drilling. GN vacuum pump is working with high performance and less maintenance. The pump can transfer material with high gravity and high density, with dry solids material or slurry with solids content max. up to 80%.

GN Solids Control make small footprint solids removal unit (SRU) for diamond drilling and mining industries. solids removal unit (SRU) can help to separate the liquid and solids in the slurry waste generated from such mentioned drilling activities. After the shale shaker and centrifuge separation, the dry solids waste is with little water content, the volume is much smaller than the original waste. And it is easy for transport. And the solids waste can be used as construction material. The recovered liquid phase is with less solids, it can be reused for drilling and mud mixing.

Besides the shale shaker and decanter centrifuge separation, GN Solids Control equipped a small size mixing hopper with a mixing pump to prepare qualified new drilling mud to support a continue diamond drilling and mining activity.

The dirty drilling mud from drilling collar is first collected in a mud storage tank. There is a submersible slurry pump allocated on the storage tank to feed the dirty mud to shale shaker for coarse solids separation. The shale shaker is the 1st stage separation. GNZS752 shale shaker is used in the process. It is a min size shale shaker with single deck and 2 screen panels.

The coarse solids will be screened and discharged from the small shale shaker, the liquid phase will pass the screens and fall down into the #1 sand trap of the mud tank. And then there is a screw pump will suck the liquid from sand trap and feed to high speed decanter centrifuge for fine solids separation.

The replacement screens on the mini size shale shaker GNZS752 is fine in order to remove more solids phase, and to maximum reduce the mud weight. And it is to ensure that, after the shale shaker separation, the recovered liquid phase is qualified for decanter centrifuge separation. After centrifuge separation, the clean liquid will flow to the 2# centrifuge tank.
The mixing pump is capacity to suck the drilling mud from #1 sand trap and #2 centrifuge tank, with the power adding from the mixing hopper, the qualified new drilling mud will be send back to the tank compartment and waiting for sending back to rig via s supercharge pump.

Besides the 9 inch mini size decanter centrifuge, GN Solids Control is capacity to make other big sizes for various application, it includes but not limited to drilling mud solids control system, waste water dewatering system, oil sludge separation system, and drilling waste management system, etc…

GN Solids Control finished another full package of oil sludge treatment system to Kazakhstan market. Before this, GN Solids Control exported other sizes oil sludge treatment package to the market, and clients are happy with the performance.

Below are the major separation modular included in the oil sludge treatment system to the Kazakhstan client.

1. A 20ft containerized pre-mixing tank.

The mud tank is the same size with 20ft container for easy transportation. The tank is for both dilution and mixing. There are 2 mud agitators equipped in the mud tank to mixing the oil sludge well. A vertical slurry pump are mounted on the tank top. It is for transferring the drilling mud from the pre-mixing tank to shale shaker separator.

2. A shale shaker separation modular

There is a mud tank and a shale shaker separator included in the modular. It is a double deck shale shaker for solids removal. The double deck shale shaker is specially designed for oil sludge treatment. There are covers on the shaker top to avoid sludge spay. As the oil sludge is normally with high density and viscosity. GN Solids Control equipped nozzles for heating the material. It is to reduce the viscosity to help for the separation.

3. Decanter centrifuge and disc centrifuge modular

There is a decanter centrifuge and a disc centrifuge allocated on the mud tank. The decanter centrifuge is for 2-phase separation. The outputs from decanter centrifuge is particle phase, oil and water mixture. It is to treat the liquid recovered from shale shaker. The disc centrifuge is for 3-phase separation, it to recover the clean liquid discharged from decanter centrifuge. After disc centrifuge, the final outputs are fine solids cake, clean water and recovered oil.

There is a small water buffer tank and a small oil buffer tank allocated on the centrifuge modular. There are oil pump and water pump near the oil tank and water tank to transfer the recovered oil and water to outside storage tanks.

Recently, GN Solid Control has successfully finished a set of mini size sludge vacuum pump and mini size decanter centrifuge, they will be exported for a foreign customer. They will be used for a tank cleaning project.

The solids and sludge vacuum pump is a mini size with portable design, the model code is GNSP-10. The mini size vacuum pump is equipped with tires for easy movement. It will be used to transfer the waste slurry which is generated from tank cleaning works. And the decanter centrifuge model code is GNLW224. It is a 9 inch mini size bowl centrifuge with high speed for solid and liquid separation. GN Solids Control sludge vacuum pump and decanter centrifuge are widely used in China and outside China at various job sites. Clients are very happy with their performance.

GN Solids Control makes various sizes sludge vacuum pump for solids, sludge, powder or liquid transfer. It is a kind of vacuum pump that forms a vacuum in the tank through pneumatic, then sucks the materials, and then inflates the tank into positive pressure to discharge the materials from the tank. Because its working principle is pneumatic and no power supply is required, GN Solids Control vacuum pump can be used in explosion-proof areas and hazardous areas.

Due to the unique venturi device of GN Solids Control solid vacuum pump, it can produce a vacuum effect of 25 inches Hg (mercury column) under the condition of strong air flow, empty the air in the tank and then suck the materials, so there are almost no wear parts. It is suitable for the transportation of high-density materials and materials with solid content exceeding 80%, and its stable performance enables it to operate in the most difficult environment.

GN Solids Control 9 inch decanter centrifuge is a small bowl centrifuge, which are mainly used under the working conditions of small treatment or limited site, and are also ideal equipment for centrifuge experimental test. The mini side centrifuge is mainly used to treat the oily sludge extracted from the oil tank by the vacuum pump for solid-liquid separation. According to different customer needs, our company can also provide customers with three different control modes; Constant speed control, frequency conversion control and full hydraulic control. In addition to centrifuges, our company can also provide customers with professional chemical dosing devices, which can be used with centrifuges to obtain better solid-liquid separation effect.

Quantity 2 decanter centrifuges is under assembly and do factory testing in GN workshop. Both the 2 centrifuges are 14 inch bowl size. It is the most popular centrifuge size for oil and gas drilling mud treatment. GN Solids Control can make customized color and logo for GN centrifuges and other equipment. The 2 centrifuges are make per clients’ request for Middle East.

The quantity 2 decanter centrifuge are equipped with positive pressurized VFD control panel. The VFD panels are with installed with explosion proof air conditioner for self-cooling. Both the decanter centrifuge and VFD panel are complied with Europe ATEX Standard Explosion Proof to suit for 55C degree ambient.

Below are some basic principles of drilling fluid treatment decanter centrifuge operation:
1. Do not start the centrifuge without belt shield;
2. To ensure trouble free operation, first rotate the centrifuge bowl by hand before power the centrifuge;
3. If there is abnormal noise or vibration, do not continue to use. Stop the machine soon for trouble shooting.
4. Before feeding drilling fluid into centrifuge, make sure the centrifuge reach the specified speed.
5. Do not overfeed the centrifuge to avoid overload.

GN Solids Control can make heavy duty telescopic skid for all size GN centrifuges. During jobsite operation, the feeding pump, VFD control panel, pipelines and cables are all installed on the skid for easy layout.

GN Solids Control offer German brand NETZSCH pump to feed for GN decanter centrifuges. The rotor and stator are made in German. The whole pump assembled in China.

Besides screw pump, GN Solids Control makes other transfer devices for oil and gas drilling field.
1. GN Solids Control can make various sizes centrifugal pump for drilling mud transfer.
2. GN Solids Control can make vacuum pump for solids and sludge transfer. Compared with normal transfer pump, GN vacuum pump can allow high solids content and bigger size solids. The discharge distance of GN vacuum pump can up to 500m or 1000m based on the models.
If you are interested in any equipment, welcome you contact GN Solids Control freely.