Centrifuge Operation Optimization

If you have already knew how to choose a decanter centrifuge, and already done some test, found out some valuable data with sample testing, it is successfully handled by the decanter centrifuge, and well knowing the size, expected performance, right scale, solid & liquid properties seems good too. Then also have some professional operator to run it. All seems perfect, then with a running centrifuge, is there anything you need to take care?
Below info. maybe a hint.
-Feed Rate
-Bowl Speed
-Pool Depth
-Pool Length
-Conveyor /Bowl Differential Speed
-Feed Concentration
-Feed Temperature
Find some good centrifuges here: http://gnsolidsaustralia.com/drilling-fluids/gnlw363fhd-full-hydraulic-decanter-centrifuge
Decanter Centrifuge
-Feed Rate
This adjustment is probably the easiest to carryout and does not involve stopping the centrifuge. The effect of feed rate on performance can be generalised as follows.
The higher the feed rate the less residence time the liquid has in the bowl hence the harder to
settle out possible ultra fines. Conversely the lower the feed rate the longer the liquor residence time and hence the easier to obtain clear liquors and in some instances 100% recovery of solids.
-Bowl Speed
Can be changed automatically with VFD drive, or manually with changing the belt / pulley, to change the G force.
Higher speed normally means better result, less moisture, more fine solids separated.
Whilst higher power consumption, more general wear and tear too.
-Pool Depth
This is not able to adjust while operating, normally rotate all the weir plates. Consequently the deeper pool depth, the shorter drying beach, then the wetter the discharged solids.
-Pool Length
The effective pool length can be adjusted by feeding in one of usually mo feed compartments. By feeding in the feed compartment nearest to the liquor discharge end of the bowl, the effective pool length is shortened hence the least residence time for the liquid. Respectively the longer the pool the longer the residence time
-Conveyor /Bowl Differential Speed
The conveyor to bowl differential (Delta RPM) is altered by changing the bowl speed due ro the
gearbox. The gearbox itself can be changed for a different ratio, though an expensive change
once in the field.
The lower delta rpm, the longer residence time, and the dryer cake, but also less capacity.
Too low delta rpm may cause overloading the conveyor with solids
-Feed Concentration
High concentration will cause poor separation.
-Feed Temperature
The hotter feed, the less viscous, and the better result.
Generally for many many years, the principles and philosophy of centrifuge operation is not changed, the subject of centrifuge operation is complexed, and also simple, with combination of application experience, testing, or even designning, you will have your own invaluable knowledge about material, desired separation results etc.
Still GN Solids Control team is ready to be even more helpful.

Choose a Decanter Centrifuge in Purpose

This is a how to article and discuss how to find a proper decanter centrifuge, basically two things need to be considered: economic expectations and technical requirements. It is essential to clearly define the process, and pass this information to the centrifuge supplier at initial briefings.
The prospective user should also clearly define exactly what the centrifugal process is required to achieve. Fluid charactor before and after treatement, density, viscosity, solids content etc.
The whole process in your plan, before and after centrifuge. Does the material require clarification, classifi cation, degritting, thickening, dewateri.rg, washing or separating and repulping, and is the process a solidliquid, liquid-liquid or a three phase liquid-liquid-so1id duty?
decanter centrifuge
Once the process is clearly defined, it is easier to identify variables such as the percentage of suspended solids, volumetric slurry throughput, solids throughput and the required product consistency at discharge.
Other consideration like G force, pH, for different applications.
Particle size, distribution arrd shape are also important factors when determining separation capabilities ald whether or not a batch or continuous centrifuge is the best option. Generally, materials which are predominaltly 45 microns and above and relatively incompactable are suitable for separation by filtration equipment, whereas finer or compactable materials lend themselves more to separation by sedimentation.
Decanter centrifuge are used to process unweighted and weighted, water-based and oil-based drilling fluids (muds). Mechanical energy is utilized to increase the gravitational force exerted on solids that are present in the mud system.oilfield Decanting Centrifuge are able to apply over 3,000 G-forces on the liquid/solids mixture, which separates the heavier solids from the lighter solids. Additionally, high G-forces separate fine solids from liquid.
Mechanical separation of solids from the mud system through the use of a decanter centrifuge is a highly-effective means of maintaining proper mud weight and viscosity. When used in conjunction with other Solids control equipment, decanting centrifuge enable users to maintain the mud properties within the prescribed range as per the drilling program. Typically,oilfield decanting centrifuge is the final processing units in the arrangement of solids control equipment.
GN Solids Control manufactures different type of decanter centrifuges, from 9in to 72in, and widely used in oil gas industry, now moving into other industries also.
Keep tune and find out more updated decanter centrifuges from GN. http://gnsolidsaustralia.com/drilling-fluids/gnlw363fhd-full-hydraulic-decanter-centrifuge

Catch up in NEW DELHI India

GN is joining the Petro India exhibition in New Delhi, from the very start, GN have done very good in India market, thanks to all the support from clients there, we keep growing up our business. Though the market is not going very well, still we get a lot of potential there.

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The exhibition is in
4th-7th December,2016
NEW DELHI, INDIA
http://www.petrotech.in/
GN booth number is E13A, area is 15m2

This time we will bring a small centrifuge GNLW223 and some shaker screens. With updated model, a small sparrow showing the whole picture of the birds. With duplex SS bowl, tungstun carbide tiles screw protection, ceramic ring protection for solids discharge.
So GN keeps research and develop the best technology to manufacture top quality shaker screens for our clients. GN is able to make around 8000 PCs of shaker screens every month.

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GN Solids Control can make different type of screens like:
Hook strip flat screen
Steel frame screen
Composite frame screen
Pyramid screen
Hook strip soft screen
Any replacement for other brand shale shakers:
Replacement screen for Derrick Shaker
Replacement Shaker Screen for MI-Swaco Shaker
Replacement Screen for NOV Brandt Shaker
etc.

Welcome to visit our booth and have more information there.

Dewatering Package Ready

In Singapore, GN Solids Control have a complete system from solids control to dewatering, helping clients to have some good final result. A video http://gnsolidscontrol.com/video/gn-solids-control-drilling-mud-dewatering-system-working-video
big-bowl-centrifuge & dewatering
GN big bowl decanter centrifuge is always welcome all over the world, because of its good quality, well design, and good price also. Customized design also been done on the dosing unit, can be a 20ft whole container, or a stand alone unit, or any other composition.
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GN Waste Decanter Centrifuge Features:
PLC Control Centrifuge Conveyor
High G Force up to max 3000. Big Volume Design.
Bowl Material Duplex Stainless Steel 2205 made from centrifugal casting.
Conveyor Wear Surface: Tungsten carbide tiles .The life is much longer than hard surface. And all tiles is interchangeable for easy maintenance.
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Preasurized Explosiong Proof with PLC and HMI control for automatical operation.
All the bearings for the centrifuge are SKF
And can be used for Drilling Waste Management, water based drilling waste and Oil Sludge Treatment
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Introduction of The GNDU2000 Series 20FT
Dewatering Unit provides a process of chemically enhanced configuration to remove the fine solids less than 5 microns from the water based drilling fluids. As it known that traditional solids control equipments like shale shaker, desander desilter, and decanter centrifuge will removes solids upper than 5 microns, for colloidal-size particles which is less than 5 microns will build up in the drilling mud system. To maintain the drilling mud properties, the operators have to dilute the drilling fluids with water, this consumes more water and create more drilling waste.

1500GPM TBM Mud System for Hongkong

Hongkong, like Singapore, is small place with huge business potential, not only as a transport center, or a bridge for mixing the different culture to the world. While always some first taste of new. As the connection from long history, and the developing of China. More and more Chinese brand are recognised by clients in these places.
Befor this project, another TBM project, and also some HDD project for the airport, clients choose GN products to do the separation job. This time again, a TBM project, a whole mud plant for TBM mud recycling. with equipment below:
1. GN’s proposal is 3 unit shale shakers with treating capacity of 500 GPM, or even larger. The largest advantage of GN shale shaker is simple structure for easy operation and maintenance. Hollow type rubber for sealing between the screen panel and shaker deck ensures the cleanness of the mud.

1500GPM Mud Recycling System
2. After treated by the mud cleaner, most of the useless solids larger than 20 microns would be removed out.

3. Client could optionally choose the decanter centrifugeunit with dewatering container and equip into the mud recycling system to separate the ultra fine solids in the drilling fluids. GN have designed a big bowl centrifuge specially for the tunneling projects. By using the centrifuge unit, the driller could recover more drilling fluids.

GN Mud Recycling System

Let us know your requirement, GN can also customized a solution for your operation site.