Tunneling Centrifuge Decanter for TBM Mud Separation
Saturday, 03 September 2016 12:37

Now 30in L/D ratio upto 4.4 big bowl centrifuge available from GN Solids Control !

Before only in developed countries, except compacet desanding plants, still have chemical dosing unit, decanter centrifuges to separate the very fine particles, to have clean water, or better solids output. Nowadays, more and more countries, projects is asking for centrifuges to handle the fine solids. And most of the TBM projects have high capacity requirement, so big bowl decanter becomes more and more popular.

TBM decanter centrifuge

GN Solids Control have developed severial series big bowl centrifuges for waste mangement, and TBM mud separation, but to solve more problems more effciently, we have 30in GNLW764 decanter centrifuge. Below is the main specifications.

Model

GNLW764A

Bowl Size

760x3344mm

Bowl Speed

2650RPM （3000G）

Differential Speed

5-28RPM

Motor Power

Main 132KW, Back 90KW

Driving System

Dual VFD System

Capacity for slurry

120m³ （solids＜20%）

Gear box torque

25000 N.M

Dimension(mm)

5500x2000x1700mm

Weight (KG)

17000KG

TBM decanter centrifuge

GN Solids Control is now strengthing our engineering team by hiring more and more expeienced centrifuge personnel from worldknown centrifuge manufacturers. With absorbing different knowage, we will be more stronger to supply better products.

It is widely known  traditional solids control equipment 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 TBM Slurry system. To maintain the mud properties, the operators have to dilute the drilling fluids with water, this consumes more water and create more waste. For limited and zero discharged closed loop system, the GN dewatering unit is a very important unit to keep the mud clean and reduce the waste which has to be sent for treatment and disposal. GNLW764A decanter centrifuge work with a polymer dosing system is able to treat around 120 m³/h  TBM Slurry to clean water for reuse.

Pls check the brochure online to findout more details:

https://doc.co/MF4C9c
 
Why Duplex Stainless Steel Matters
Saturday, 27 August 2016 03:28

Even though the market continues to be dominated by 304L and 316L, we would glad to find out with better material duplex stainless steel, we are having more buisness. For solids control equipment, we are discussing decanter centrifuge. We are not the first decanter centrifuge manfuacture who is moving forward, but as a Chinese solids control equipment manufacture, it is already a long road overhead other competitors.

As we always stated, price second, quality first, and to keep good quality, well selected material is one key.

duplex stainless steel decanter centrifuge

The use of duplex grades has grown continuously since the 1990s. This growth has been accentuated by the current high cost of raw materials that makes duplex very cost- attractive compared to austenitics. In the de-aerated part of MSF/MED processes 316L and 316Lmo has mainly been used, but now the trend is towards duplex 2304 or 2205. There is an increased pressure in many countries to reduce the impact on the environment of industrial and power generation activities. Many of the most effective measures have proved positive for stainless steel usage:

For decanter centrifuge, not only anti corrosion, a lot of other material spec helps its operational life. For GN decanter centrifuge, we are using centrifugal casting bowl, which is more accurate, and less maintains / modifications when you fabricate the centrifuges. And more international, as most of the higher standard decanter centrifuge suppliers, are actually using duplex stainless steel.

More and more feedback from site approves our improvment, and hope you will also be the one.
 
Vertical Screen Scroll Centrifuge
Monday, 15 August 2016 01:24

When drilling waste management becomes a big problem of oil gas industry. The Vertical Screen Scroll Centrifuge was brought to this application, the US manufacture improved the product and used it for drilling waste, then it became a standard product of drilling waste management. After GN Solids Control march into manufacturing the verticle cuttings dryer, now we are going to improve the orignal design of Vertical Screen Scroll Centrifuge, with experience of verticle cuttings dryer, and experience in drilling waste management.

The GN Vertical Screen Scroll Centrifuge uses centrifugal force to dry wet coal. A stainless steel screen bowl traps wet coal and accelerates them up 900RPM with G force to 420G. This G force is higher to most of GN competitors which will give better separation. Liquid is forced through the screen bowl openings, the openings of the screen is optional in different sizes, while “dry” coal are extracted by the angled flights or knives attached to the rotation cone, which rotate slightly slower speed than the bowl and screen. This differential speed is to push the dry solids or coal to discharge from the bottom of the screen centrifuge.

Tungsten carbide protects the flights from abrasive solids and ensures long operational life. This aids in maintaining a constant gap between the scroll and screen bowl of the centrifuge, which is crucial for proper operation.

Contact GN freely to discuss with us how to improve vertical screen scroll centrifuge for mining projects, if you are in the mining industry, and want to have a better product with better result.