solids control

An South American Waste Treatment Service company sent information to us, GN Solids Control,  and looked for the exact solution for the DAF Sludge Treatment.

DAF, the full name is Dissolved air flotation, which can be widely used in sewage treatment, in the fields of industrial, manufacturing, oil & gas drilling, and marine waste water treatment.

DAF systems inject micro bubbles into the waste steam which attach to the solids and float them to the surface where they are skimmed off. However one of the more common issues with a DAF system is the mess associated and disposal cost and with handling the skimmed off waste solids.

For treating with the huge amount of Waste Solids, GN company offers reasonable solution to remove the Solid (suitable for discharge), and recollect the water and oil separately–Decanter Centrifuge plus Disc Centrifuge.

GN decanter centrifuge proves to be an effective and well proven equipment solution for dewatering the typically wet, sloppy solids skimmed off many DAF processes and wastewater systems.

GN supplies 250 sets of Decanter Centrifuges every year, with 70% purchased by the International Market, such USA, Canada, Holland, Australia, UK, Kuwait, Russia. It is 2 phase separation, for Solid and Liquid Separation.

 

After the solids being separated, if the client would like to recollect the high purified

Oil, Clean Water and separate the Fine Solids, GN suggest Disc Centrifuge

The Capacity can be from 1 m3/h to 15 m3/h, Bowl Speed reaches more than 6000 RPM.

Attention, the Solids Content of the feed material shall be 3% maximum.

Welcome to contact us, GN Solids Control, if you have problems with treating the DAF sludge. Our professional Technical Department would offer the exact solution based on your detailed requirement.

Tel, +86-316-5276989

Email, kevin@gnseparation.com

It is always a big headache for dealing with the Mud from our activity.
GN provides a reliable solution—Decanter Centrifuge.

 

GN Decanter Centrifuge is designed for the drilling mud solids control and oilfield waste management. GN VFD drive decanter centrifuge with variable speed allows Drilling Contractor or Mud Service Company to do the barite recovery, fine/ultra-fine solids separation, dewatering centrifuge. GN has the decanter centrifuge from 9 inch bowl to 22 inch bowl available for different applications. GN decanter centrifuge bowl length and diameter ration is over 3, this gives the best result!

• Patent Design with the highest configuration and best material for long and reliable service.
• Bowl Cylindrical and Conical section made from Duplex Stainless Steel 2304 by centrifugal casting.
• Other Parts of the bowl assembly material: stainless steel SS304.
• Screw protection: Tungsten Carbide Tiles for longer life and easier replacement.
• Screw flow distribution port and bowl solids discharge port protected by tungsten carbide alloy.
• Easily adjustable liquid discharge weir height for flexible application.
• Bowl assembly supported by tighten belt for protection of bearing in moving.
• Pressurized EX Proof VFD control cabinet with PLC controlled.
• Genuine SKF bearing for longer and reliable operation.

This week 2 units of VFD decanter centrifuge ready for shipment to India for ONGC project in GN factory. The clients ordered 2 units of GNLW453C-VFD with screw pump for their solids control system with their customized painting color.


GNLW453C-VFD centrifuge with 18inch bowl and 61inch length, the max G force is up to 2578G, considering the high temperature in India, the positive pressurized VFD control panel with air conditioner for cooling, in some countries with environmental temperature less than 40 degree, the VFD control panel attached cooling tube for cooling. The frequency converter of the main motor, back drive motor and pump motor is all made of ABB brand, the other electric components are also world famous brand like Siemens/ schneider/ ABB, the motor and VFD control panel are all ATEX approval and suitable for 460V/60HZ, 3 phase and apply for zone 1 application.
Features of GN decanter centrifuge:
1) Different with other Chinese centrifuge manufacturer, GN use SKF bearings, since bearing block is the most important part for centrifuge, we use more reliable brand bearing to improve the centrifuge working life and reduce maintenance cost.
2) The screw is completely made of stainless steel, the impeller is protected by tungsten carbide tiles, the fluids distribution port is protected by tungsten alloy and interchangeable.

This week GN Solids Control shipped 400bbl mud tank system to Australia drilling company. The configuration of the 400bbl mud tank system is as below:

1) 2 mud tanks, dimension: 12000x2800x1500mm, each tank with 200bbl tank volume, the stairs are outside of the mud tank to promise the largest tank volume.
Mud agitators are installed on top of the mud tank to prevent solids sedimentation.

2) 2 units of GNZS703F-HB linear motion shale shaker, installed with GN OEM composite material frame shaker screens, which is durable longer working life and larger effective screens area for better separation performance, the screens are with GN unique design locking system and the composite material frame make it stocked for over 5 years without getting rusted.
Normally we will package the shaker screens and wedges separately and bond on the shale shaker to avoid it get rusted during sea transportation.

3) Single skid amounted jet mud mixer and connect with the 2 mud tanks, it can mix the drilling fluids from any compartment of the 2 mud tanks except for the sand trap. Oilfield skid mounted design to promise the largest tank volume and easy maintenance. Separate control panel are installed on the skid to control the mixing pump.
4) All of the above equipments are IEC ex and the electrical cable, control panel, glands, etc comply with Australia explosion proof standard.

GN Solids Control, as the first API certified solids control manufacturer in China and also the leading oil and gas centrifuge producer, has a full range of centrifuge models from the 9 inch diameter bowl baby centrifuge to the 30 inch diameter bowl giant centrifuge. Each year, GN produces more than 150 sets centrifuges of different sizes and GN equipment like shale shakers, shaker screens and decanter centrifuges are sold to more than 70 countries or regions in the world.

About GN Solids Control

GN CENTRIFUGE

GNLW centrifuge jobsite picture

This Q/A are giving more information for choosing and getting a more comprehensive information of GN Centrifuges.
1. Why there are VFD for decanter centrifuge and also fixed speed available?
VFD control panel helps the operators to adjust the speed, the differential speed and other main parameters of centrifuge to get a suitable separating result. In drilling cuttings or drilling fluid waste management conditions, when the material condition is not stable, it is necessary to use a VFD one. But in case of solids control system of a drilling rig, when the mud condition is stable, a fixed speed control panel here is more economic, cause it requests less maintenance and easier operating. Take GNLW363CG for example, even the fixed speed one, GN could provide pulley and belt for an extra common speed.
2. What’s the main difference between the high speed decanter centrifuge and a middle speed decanter centrifuge? The rotating speed of centrifuge determines the cutting point the centrifuge could treat out, for example the GNLW452C decanter centrifuge, with a typical speed at 1800RPM is mainly used in a solids control system for barite recovery, the cutting point is 5 to 7 microns, while the GNLW453C-VFD with a typical speed of 3000RPM, which is a high speed one, cutting point is 2-5 microns.
3. What’s the difference between longer centrifuge and shorter centrifuge? The length diameter ratio is an important factor of a centrifuge. The longer centrifuge is a centrifuge with a larger length diameter ratio. The bigger this value is, the longer time material stays in centrifuge, then the dryer separating result you could get.
For more information, welcome to visit GN website of contact GN sales directly.