A Customized Environment Waste Management Solution

Various Waste
Now China is like old UK, we got many problems with coal usage, we knew it, trust me, we knew it, and still, we are on the old track, having the same problem, maybe not a tragedy yet, but close.
For environment problems, we need to handle much more than coal, different pollution comes to us before we realized it was our price for developing.
And we never realized that when we did it, at least we never thought it was a problem.
2016-12-08-oil-sludge-treatment-system 2016-12-08-oil-slurry-separation
Lucky now we know, now we wake up, in the smoke, we are trying to repair, find solution for the damaged planet. The biggest job we can handle is not so related to air pollution, or water pollution, it is part of them, and fortunatly we are part of it.
This time a client comes to us, need to separate the waste, even for this project, waste from different place. With differnt size particles.
Solutions From GN
When we analyse the site waste, from pictures, samples, we decided to use a system, which contains a shale shaker, and a decanter centrifuge. Shale shaker for dispose most of the big ones, then centrifuges with foluccent maybe, maybe not, to separate the small ones, to reuse water at the same time.
About This System
For thic specific project, we are using GNZS594E shale shaker, with G force upto 7, and armed with composite material screens to increase the equipment life time. For the centrifuge, we are using most popular model GNLW363CG-VFD, SS2205, tungstun carbide tiles screw etc.
This same logic is widely open sourced, can be extend to different similar ideas, different shaker, different centriruge, also work.

2sets Decanter Centrifuges to Latin America

If you have some good products like them, and have a little lower price, I mean not a big price gap but not in good equipment condition, quality, you will have perfect market. A lot of clients keep telling us this same story, and that is how it works, when you have a good product, and fair price, it works.
1)    GN Solids Control build the decanter centrifuge with best material for not only performance but also durability. The bowl of the decanter centrifuge is Duplex stainless steel made from centrifugal casting. The screw inside the bowl is made from Stainless steel with reparable Tungsten carbide tiles for protection.
161214-mud-decanting-centrifuge 161214-solids-conrol-centrifuge
2)    High Speed and good balance: Because we use the most advanced CNC machines to process the parts for the centrifuge, and also GN is one of the few companies who has 3 stage balancing technology, include middle speed dynamic balance at 1800RPM and high speed dynamic balance at exactly the centrifuge operation speed.
3)    Cost effective, we never make the lowest price centrifuge
GNLW363CG is most popular model of centrifuge for drilling fluids solids control. Every year, GN make over 100 sets of the 14inch decanter centrifuge for the oilfield solids control and waste management. GN Solid Control just complete several solids control decanter centrifuge with feed pumps for Latin America oilfield Service Company. Those centrifuges are the GNLW363CG premium decanter centrifuge with 14 inch bowl. The speed of the GN 14 inch decanter centrifuge is up to 3900RPM, normally is 3200RPM for drilling fluids solids control.
This time one client from Latin America purchased 2 units centrifuge, for solids control. We keep many centrifuges in stock, which make the delivery time very short even with the nearly 2 month sea shipping.

The GN Big Bowl Centrifuge

Have met some stubborn engineers which only prefer 14in popular size decanter centrifuges, and never mind the qty it will be used, also some others who only prefer the big bowl one, and no matter how big it is. Before it was a problem, back to the time GN only offer 14in and 18in, as it was popular. Nowadays, since we have upgraded our manufacturing system, and also keep learning and optimizing our managing system. We are now able to supply not only 22in, also 30in centrifuges, while the inside screw size is bigger than 14in, neverthless the length / diameter ratio, most of them can upto 1:4 now.
big bowl decanter centrifuge
The GN 30 inch (760mm) bowl diameter decanter centrifuge is a big bowl centrifuge. GN 30inch centrifuge is with bowl length and diameter ration of 4.2:1. This bowl size allows client to handle big volume fluids with one single unit. Because of GN unique design for the screw and bowl, the GN 30 inch decanter centrifuge is design for best performance in Tunnel Boring Project Mud Cleaning, Dredging Slurry Separation, and Municipal Sewage Sludge in Purification Plants, Industry Waste Water Treatment.
According some feedback regarding GNLW553, we have upgrade the new generation to GNLW554, to make sure it have higher flow rate, and better fluid / solid result. With the modenized machine, it is not so obvious increasing the cost. This Fully Variable Speed VFD controlled unit is built using the most reliable and robust electrical components, with either ABB or SIEMENS brand variable frequency drive units. Electronic load sensing and feed pump control permit automatic optimization of the feed rate, bowl speed, and differential conveyor speed.
This may not be related to this title, but the GN 9in baby centrfuge is also have higher ratio.
Keep tune on GN big bowl centrifuge, if need more information, pls let us know.

Meeting with GN People in the Exhibition You Know, Make a Schedule Before it’s Late

GN Solids Control have joined many exhibitions in 2016, and met with clients from all over the world, if you are not one of them yet. Here is somethign you will not miss in future.
1. OSEA Singapore
Time: 29 Nov. ~2 Dec.
Location: Marina Bay Sands Singapore
GN booth: 1G5-01
Equipment: GNLW363D decanter centrifuge
2. Petro Tech 2016
Time: 4~7 Dec
Location: New Delhi India
Equipment: GNLW223D
Then you have probably already missed CIPPE, OTC, ADIPEC, Trenchless Asia, Iran Oil Show, Russia oil show etc.
A few questions you may want the answer before you come to meet with us:
1) What is NEW
Using our equipment, or not yet, you may want to know what we have done, the R&D. Well if you have kept tune with GN news, or following my linkedin, then you may have already noted all this.
This year, GN have released decanter centrifuges for all other industries, food, waste oil, farming etc.
Now GN can manufactur most of the popular screens with composite material frame, which tested in Russia, operating time is more than 500hours.
2) Who is your client, who have used your euqipment.
If you have download our presentation, you may noticed we list some of them.
Baker Hughes, the case study can be found here.
Baroid, Scomi, EMEC, COSL
3) What can you do in my projects
We will let you know what we normally did, with your comments, we will find the solution for you.
Follow George from Linkedin, get more recent updates.

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.