GNSX-450 is a three phase decanter centrifuge. The bowl size of GNSX-450 three phase decanter centrifuge is 450mm (18 inch) diameter by 1800mm in length. It is designed for 24 hours continuous and smooth operation throughout the day. It is mainly composed of driving system, decanter bowl, and screw conveyor inside the bowl, cover box, skid and VFD control panel.

Working principle of GN Solids Control 3 phase decanter centrifuge

GN Solids Control 3 phase decanter centrifuge is mainly designed and made for liquid, liquid and solids separation. GN Solids Control 3 phase decanter centrifuge can also be applied to two immiscible liquids with different specific gravities. When the solids and liquid mixture (raw material before separation) rotates into the high-speed rotating bowl internal the 3 phase decanter centrifuge, the solids and liquid mixture rotates synchronously with the drum. As the reason of the different specific gravity, the centrifugal force of the solids and different liquid is different.

The solid particles which with the larger specific gravity are subjected to the greatest centrifugal force, followed by the heavy phase liquid (such as water) and the light phase liquid (such as oil). So the centrifugal force is becoming less from outside to inside according to the magnitude of centrifugal force. A concentric solid layer and two liquid layers are formed.

The Solids phase inside the mixture will be pushed out by the conveyor impeller of the centrifuge bowl, and liquids are removed from their respective nozzles depending on different gravities. As the reason, GN Solids Control three-phase decanter centrifuge can not only separate the solid from the solids and liquid mixture, but also separate the two-phase liquid with different specific gravity in the liquid and liquid mixture. In this case, Solid / liquid / liquid separation can be achieved.

Besides 3-phase decanter centrifuge for oil field and non-oil field, GN Solids Control has other separation equipment to cater for different application, like shale shaker, mud cleaner, desander, desilter, degasser, transfer pumps, drilling waste management equipment, etc…

GN Solids Control sells many 9 inch small size decanter centrifuges to South America every year. A few days ago, some sets of Solids Liquid Separation Small Decanter Centrifuge for South America Client are ready for shipment.

9 inch is a small size decanter centrifuge used for solids and liquid separation. It is normally used in diamond drilling slurry separation system. The 9 inch Solids Liquid Separation decanter centrifuge is also popular used in mining industry waste water treatment system.

GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is specially designed for small capacity, small footprint, and fine solids separation.

The Bowl material GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is SS 304 by forging. Similar as popular size 14 inch decanter centrifuge, the Screw protection of GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is with Tungsten Carbide Tiles for longer life time and for easier replacement.

Bowl solids discharge port of GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is protected by Ceramic casing, solids blocking ring avoid solids building up. Bowl assembly supported by tighten belt for protection bearing during transportation.

 

Besides 9 inch Solids Liquid Separation Small Decanter Centrifuge, GN Solids Control is also capacity to make other solids liquid separation equipment, like other sizes decanter centrifuge. Shale shaker, mud cleaner, etc…

Besides centrifuges, shale shaker and mud cleaner, GN Solids Control makes full line drilling mud processing equipment, like mud agitator, centrifugal pump, vacuum degasser, mud gas separator, jet mud mixer, screw conveyor, slurry pump, solids sludge vacuum pump, screen vacuum unit, vertical cuttings dryer, high G dryer, dewatering system, solidification unit, etc…

GN Solids Control can also make full package drilling mud purification and recycling system to treat drilling mud and drilling cuttings from various drilling activities (oil and gas drilling, HDD, CBM, water well drilling, TBM, piling, micro tunneling).

Shale shaker screen is the most important and necessary wearing spare parts for oilfield shale shaker and mud cleaner. The function of a shale shaker screen is to remove the particles bigger than the screen opening, and recover the usable drilling fluids which will go through the screen openings and get back to the drilling mud recycling system.

There are many brands shale shaker and mud cleaner, and every brand has his own design and own sizes shale shaker screens. In order to control the mud weight accurately, how do the mud engineers choose the right screens openings from different shale shaker and shale shaker screen suppliers?

In order to solve the problem, a general standard is necessary for design shale shaker screens. API RP 13C is an international popular standard to define the shale shaker screen specifications. A authorized lab will test a shaker screen by using a specific test procedure (as described in API RP 13C), the lab test will define a series of specifications of the screen, like D100 cut point, screen conductance, non-blanked area. After these specifications are confirmed, the API Screen Number is determined. It ensures that, all Shale shaker screens confirmed to API RP13C standard, if the API No. is the same, the screen cut point will be the same. Same model screens from different screen suppliers if with the same API NO., the screens are interchangeable.

Below definitions are some important parameters of shale shaker screens to help you know more about API screens:
API screen NO.: After testing a screen by using a specific test procedure (as described in API RP 13C), the API screen no. is determined.
Mesh: it relates to a piece of screen wirecloth, is a measure of the number of holes in a linear inch (such as 100 mesh) or in a linear inch in each direction (such as 100 x 60 mesh).
D100 Cut Point: The D100 cut point of a screen is the largest particle size which will pass through the screen opening. D100 means 100% percent separation.
Screen Conductance: It measured in kilodarcies per millimeter (kD/mm), defines a Newtonian fluid’s ability to flow through a unit area of screen in a laminar flow regime under prescribed test conditions. All other factors being equal the screen with the higher conductance number should process more flow.
Non-Blanked Area: The non-blanked area of a screen describes the net unblocked area in square feet (ft²) or square meters (m²) available to permit the passage of fluid.

GN Solids Control makes API RP13 shale shaker screens for different shaker brand. May you have any questions, welcome you contact GN Solids Control for inquire.

GNLW363 FHD centrifuge is designed expressly for removing low specific gravity solids from slurries and drilling fluids. In one type of processing, solids are removed and the liquid is returned for recirculation. Alternatively, solids are returned to the active system and the liquid is discarded.

GNLW363C-FHD decanter centrifuge is fully hydraulic drive. The bowl speed and conveyer speed is adjustable within the permitted range. It can achieve independent, step-less and large-range speed regulation for the bowl and conveying. The bowl speed and conveyer speed during working is showing on the screen.

The mechanical operation principle of a full hydraulic  drive decanter centrifuge is as below:

  1. The centrifuge employs centrifugal force produced by the high-speed rotation of a cylindrical bowl to separate solids from slurry. Centrifuge performance is based on three variable factors:
  2. Force exerted on the fluid – Centrifugal force pulling fluid against the outside wall of the Centrifuge
  3. Retention time in the centrifuge – The longer the slurry remains in the centrifuge the smaller the particle that can be separated
  4. Differential speed of conveyor – The faster the conveyor rotates the wetter the solids

All three factors may be manipulated in GNLW363C-FHD centrifuge to alter the liquid and solids discharge. The centrifugal force is adjusted by varying the bowl RPM. Retention time is controlled by adjusting the liquid discharge ports on the liquid bowl head to vary the pond depth (depth of liquid remaining in the bowl), and the feed rate to the unit (the lower the feed rate, the higher the retention time).

The conveyor operates at a slightly lower speed than the bowl. The conveying speed is the difference between the bowl and conveyor speeds. During decanter centrifuge operation, the CONVEYOR SPEED indicator on the hydraulic control panel displays the number of conveyor RPM less than the current bowl RPM. For example, a displayed conveyor speed of 30 with a bowl speed of 2000 RPM translates into a conveyor speed of 1970 RPM.
Other than pond depth, all other parameters may be changed quickly and easily to adjust the equipment for optimum efficiency in response to varying the feed conditions. For best performance, the slurry should be screened to 74 microns in vibrating screening machines before passing to the centrifuge for processing.

TBM is short for Tunnel Boring Machine. It is also known as a “mole”. It is a construction field drilling machine used to excavate tunnels and micro-tunneling with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from 1 m to 17.6 m to date. For smaller diameter less than 1m, it is HDD and CBM drilling. The most important part of a tunnel boring machine is its cutter head. Tunnel boring machine (TBM) is widely used today due to their ability to construct tunnels at record speeds.

But as the big diameter of the tunnel, the TBM drilling will generate large quantity waste slurry (mixture of rocks, sand, soil, water and drilling mud). The waste slurry must be treated to recover and reuse water, and reduce the solids phase waste. GN Solids Control makes different sizes of TBM Slurry Separation Plant to cater for different diameter tunneling excavation activities.

GN Solids Control is specialized in full line drilling mud solids control. equipment. All the processing equipment used for TBM Slurry Separation Plant are designed and made by GN Solids Control: the coarse separation shale shaker, desander separator, desilter separator. GN Solids Control is also capacity to make dewatering centrifuge for TBM slurry separation plant form normal size centrifuge to the big bowl and big capacity size.

Below is the popular treating capacity of GN made TBM Slurry Separation Plant models.
1. TBM Slurry Separation Plant model: GNTBM-240M. The treating capacity is 240m3/h.
2. TBM Slurry Separation Plant model: GNTBM-360M. The treating capacity is 360m3/h
3. TBM Slurry Separation Plant model: GNTBM-500M. The treating capacity is 500m3/h
4. TBM Slurry Separation Plant model: GNTBM-1000M. The treating capacity is 1000m3/h

GN Solids Control can also make big capacity TBM slurry separation system: GNTBM-900M (900m³/h), GNTBM-1200M (1200m³/h), GNTBM-1400M (1400m³/h), GNTBM-2000M (2000m³/h), GNTBM-2800M (2800m³/h), GNTBM-3600M (3600m³/h)

Many people are interested in GN Solids Control Screen Vacuum System. It is not a popular technology, many people do not know much about the vacuum screen technology. Many customers contact GN Solids Control to ask for information of Screen Vacuum Unit, including Catch Pan, Hoses and all the required accessories. Below are some communications between clients and GN Solids Control.

Question: The Screen Vacuum Unit is designed to be used on Onshore rig and offshore rigs. There are different shale shaker models at different drilling rigs. Can GN Solids Control build Catch Pans based on the existing shale Shaker models?
Reply from GN Solids Control: GN Solids Control can only build catch pan for GN own design shale shaker, and a few shale shaker models. GN Solids Control cannot make catch pan for other brand shale shaker at this moment.

Question: It said, the air pressure required is 100-150 psi. Most of the rig air compressor only supply 80-120 psi, would this affected the Screen Vacuum Unit performance?

Reply from GN Solids Control: 80-120 PSI is fine.

Question: What are the sizes of hoses from the catch pan to the Screen vacuum Unit? What are the chances of this hoses being plugged up?
Reply from GN Solids Control: It’s 2 inch hoses from the catch pan to the screen vacuum unit.
Because of the high vacuum which is up to 25 HG (Mercury Column), the power for suction is high. And also the hose for the suction is specially designed with anti-blocking material like plastic inside the hose. So it will avoid the blocking.
The capability of the vacuum pump is shown below as in the video:
https://www.gnsolidscontrol.com/sludge-vacuum-pump

Question: Where is the recovery fluid going to be discharge? Back to the active or through centrifuge?
Reply from GN Solids Control: The recovery fluid will go back to the shaker tank under the shale shaker, it needs to be treated by the afterward solids control equipment like desander desilter or decanter centrifuge. The advantage for our vacuum screen unit is that, you can calculate the flowrate of the recovery fluids volume.

Screw pump is also called as Progressive Cavity Pump. A screw pump is a type of rotary pump which is equipped with rotor and stator. The rotor and stator is combined together and rotate within a cylindrical cavity or liner. The fluid or transfer medium enters from the suction side of the screw pump and moves linearly along these intermeshing screws / rotors to the discharge side of the pump.

Screw pump is a popular feeding pump type for centrifuge, no matter for decanter centrifuge, 3-phase centrifuge, or disc centrifuge. Besides screw pump, submersible slurry pump and sand pump are also been used a centrifuge feeding pump. But as submersible slurry pump and sand pump are both a kind of centrifugal force pump, they are not as good as screw pump to feed for decanter centrifuge.

Decanter centrifuge is a high speed rotating device. There will be many self-protection function for safety and also for protect the device. A major self-protection application is over-load protection. It means in case the centrifuge feeding is over load, the centrifuge will be stopped to avoid damaging bearings or damaging rotating component. In this case, the feeding screw pump must be capable to adjust the feeding flow. There are mainly 2 ways to control the feeding screw pump input flow rate:

1) If fixed speed screw pump is used to feed for decanter centrifuge, a VFD control panel is requested to adjust the feeding flow rate to avoid over load, and to reach the better separation performance.

2) If manual adjustable speed screw pump is used as decanter centrifuge feeding screw pump. Fix speed control panel can be used for the pump for start and stop.

Furthermore, as the decanter centrifuge has self-protection function in case of overload. To avoid damage the centrifuge, there must be an inter-lock connection between the centrifuge control and the feeding pump control. In case the centrifuge is stopped, feeding pump can be stopped immediately. And the screw pump cannot be started until the decanter centrifuge is running stably.

GN Solids Control is specialized in drilling mud solids control and waste management solutions. GN Solids Control is capable to design and make Oil Water and Solids Separation System to treat and recover various kinds of waste materials.

GN Oil Water and Solids Separation Systems are capable to treat below waste materials, but not only limited to below materials:

1. It can be used to treat oil sludge and oil, oil contaminated soil remediation, like from drilling waste pits, or from pondsand tanks
2. It can be used for water oil contaminated water-control and recovery
3. It can be used to treat waste oil and recover the oil to reuse
4. It can also be used to treat waste oil, water and solids mixture, and to recover oil, water and reduce the solids waste

Oil sludge means the waste mixture consisting of oil, water and solids. Oil water separation system is used to treat the oil sludge in order to reduce waste material, and recover oil and water for reuse. The oil sludge treatment system is also a popular solution to treat oil contaminated soil and sands.

Oil sludge is a mixture consisting of oil, water and sands. The treatment on oil sludge would recover much oil and water for reuse. Also it is an ideal solution to for the solids disposal. More oil and water recovered, more energy and resource could be saved. GN oil sludge treatment products mainly include decanter centrifuge, oil water separators and thermal desorption unit.

As many customers did not do waste management system before. To ensure GN Oil Water and Solids Separation Systems can applied for their applications, GN Solids Control specially designed a one-skid compact Oil Water and Solids Separation System for trial purpose. GN one-skid Oil Water Solids Separation System is in stock for sale. Clients can buy the small system as trial base to show to their clients their capacity to do the projects. For clients in China, they can choose to buy or rent the one-skid system.

If clients do not want to buy the one-skid compact Oil Water and Solids Separation, they can send their oil sludge or waste material to GN Solids Control. GN Solids Control can do the separation at GN factories and show clients the performance. After separation, GN Solids Control can do lab test and show the final output specs to the clients.

 

Last week, several packages of Mud Cleaning System were shipped to Chinese sea port. The mud cleaning systems will be sailed to North America to service their mud cleaning projects. The project the client will do is that, they collect various kinds of waste mud and waste water from rigs or from construction field. The client transports the waste mud and waste water by vacuum trucks, and treat them together to reduce the waste material, and recover solids and waste for reuse. It is high standard mud cleaning system to suit for North America standard.

The features of the mud cleaning system are that, its design is very compact for small foot print. Several mud separation shale shakers and dewatering centrifuge unit are equipped in the system for better separation performance.

1) First separation is by double deck coarse shale shaker to remove the big size solids from the waste mud and waste water. The top of the shale shaker is covered by metal boards to avoid mud leakage during shale shaker vibration.

2) After the double deck coarse shale shaker, next separation is taken by a single deck high G force shale shaker. The same design as the double deck shale shaker, the top of the single deck shale shaker is covered by metal boards to avoid mud leakage during shale shaker vibration.

3) A package of dewatering centrifuge unit.

As there are still many fine solids particles inside the recovered water from shale shakers, a dewater unit is used in the system for chemical dosing. It is used together with a high speed big bowl decanter centrifuge for fine solids separation.
The mud cleaning systems can recovery as more sands from the waste water. Regarding the waste mud from hydraulic excavation drilling, the recovery liquid phase is usable mud for reuse. The separated sands can be used for construction material.

Last week, GN Solids Control got an inquire from a client regarding oil sludge treatment system. The client said they are a company specializing in the industrial cleaning works. They are intend to treat the sludge in oil comes from below field:

1) Waste tank bottom sludge, oily sewage generated by the crude oil tank;
2) sludge, oil sands or soil from oil pit of the refinery plant;
3) Waste oil-based drilling fluid or oil base cuttings produced by oil and gas drilling, etc.;

As part of the development of the client activity, and also they hearted about GN Solids Control before, they are interested in the acquisition of GN Solids Control Oil sludge treatment solution, for that they ask GN Solids Control to give them a suitable solution for (01) unit of sludge oil treatment plant . They want the oil sludge treatment system with capacity of 2 m3/h to 5 m3/h.

GN Solids Control confirmed with the client that, the material mentioned is their list is all inside GN Solids Control scope. Based on their requirement on handling capacity, GN Solids Control recommends the oil sludge treatment system model GNOST-05A, which can suit for the client’s capacity.

Major separation equipment in the oil sludge treatment unit is high G drying shaker, 2-phase decanter centrifuge, 3-phase disc centrifuge, dewatering unit, screw pumps slurry pump, mud agitators, etc.. .

The technology GN Solids Control is using is heating and chemical washing. The processing equipment in the system is GN core products which are sold well and performance good for many years.

GN Solids Control has many oil sludge treatment system running in China and outside China. GN Solids Control has projects reference in China, Canada, USA, Qatar, Kuwait, Kazakhstan, Indian, Indonesia, Korea, Poland, UAE, etc…
If you have any questions about sludge oil treatment, you want to get solution on sludge oil treatment, welcome you contact GN Solids Control.