Month: June 2020

GN decanter centrifuge is used for a waste water treatment project in power plant in Taiwan. Total 5 units of GNLW454E decanter centrifuges are utilized for this project, we received the lab samples of the materials to be treated before their order, we make a lab test in our factory by professional engineer and make some customized design to meet the customer’s requirement for treatment result.

Features of the 5 units of GNLW454EP decanter centrifuge:
1) Bowl material is made of duplex stainless steel 2507 for better corrosion resistance, our standard design of bowl material is duplex stainless steel 2205 or 2304, which is much better in anti-corrosion than SS316L and SS304 used by other competitors. Because the waste water to be treated with highly corrosive chemical water, we made customized design specially for this project.

2) The bearing is from SKF brand for longer working life.
3) The screw impeller is protected by tungsten carbide tiles for longer working life, and the open impeller design will increase the treating capacity and improve the separation performance, the tiles is repairable once it is damaged, especially suitable for the material with higher solids content.
4) The main motor is 45KW, the back drive motor is with 11KW. Both motors are installed on one side for compact design and enough space for operation.

GNLW453C-VFD and GNLW452D decanter centrifuge are all with 18 inch bowl, they can be used for drilling mud solids control and drilling waste management system, it can be also used as dewatering centrifuge with chemical dosing system.

Except for 18 inch bowl decanter centrifuge, we also have 14 inch bowl, 9 inch bowl, 22 inch bowl, and 30 inch bowl decanter centrifuge models for different industries.
If you need a decanter centrifuge solution, pls contact with GN solids control.

Recently one batch of mud cleaner for offshore drilling are ready for delivery, as one of the most professional solids control equipments and drilling waste management equipments manufacturer in China, GN Solids Control can produce shale shaker, mud cleaner, desander, desilter, vacuum degasser, decanter centrifuge, mud agitator, mixing hopper, mud gun and others solids control equipments for both onshore and offshore drilling rig. The standard equipments design is same, just for different applications, the explosion proof standard and lifting design will be different. The lifting frame and lifting pad can be DNV 2.7-1 and CSS approved. The motor and starter can be IEC EX & ATEX for zone 1 or zone 2 application.

The mud cleaner is a combination of desander cone ( 10inch), desilter cone ( 4 inch) and bottom shale shaker, it is also called 3 in 1. The compact design can save space on the solids control system mud tank, especially when the mud tank size is also compact. 2 nos of centrifugal pump as feeding pump of desander cone and desilter cone, GN produced centrifugal pump is interchangeable with world famous brand centrifugal pump, the pump casing and impeller are made of ductile iron for better wear resistance capability.
Depends on the drilling fluids temperature, if it is over 70℃,we will use special material desander cone with outter metal cover to prevent it from reform and damage. The desilter cone is 100% polyurethane material for longer working life.

The shaker screen is composite material frame shaker screen with SS316L material wire mesh. Our screens have been tested by API third party lab and got the report, all of GN shaker screens are produced comply with API RP13C standard.
The patent sealing rubber design ensure the good sealing of the shaker screens on the shaker deck, the bottom deck is made of stainless steel for better corrosion resistance.

Recently we shipped 4 package of fully hydraulic drive decanter centrifuge for Middle East client, including the feeding pump of decanter centrifuge with manually adjust speed . This is a repeat order of the client, the driven unit is Viscotherm and Rotidiff from Sweden.
The 4 package of decanter centrifuges are with 14 inch bowl, which are made by centrifugal casting and using SS2205 or SS2304. The screw propeller is protected by tungsten carbide tiles or build up welding. The solids discharge port and fluids distribution port are protected by tungsten carbide alloy. The customer can choose centrifuge support legs, solids discharge trough, telescopic skid for option.

Except for full hydraulic drive decanter centrifuge, GN solids control also produced VFD decanter centrifuge and rated speed decanter centrifuge to meet for different requirement. The purpose to use full hydraulic drive decanter centrifuge instead of VFD decanter centrifuge is to adopt it in high temperature ambient for heavy mud with flexible bowl speed and differential speed, especially in Middle east and Africa and other high temperature area.

The VFD decanter centrifuge can be also used in such high temperature area up to 55℃, based on different explosion proof standard requied for electric motor and control panel, we have 2 design: one is VFD control panel with self cooling system, the other one is VFD control panel with air conditioner for cooling. But when environment temperature is higher than 50 ℃,full hydraulic drive decanter centrifuge is more suitable for such applications, even though the price is a little higher, and the maintenance cost is higher compared with VFD decanter centrifuge which is drived by electricity. The rated speed decanter centrifuge can be used for solids control system drilling fluids treatment, when used it for barite recovery, the user can replace middle speed pulleys with belts.

Recently 2 package of tandem shale shaker are shipped to India drilling company, including the spares and shaker screens with different API mesh size and tool kits. The features of the single shale shaker is as below:
1) Stainless steel material with all the vibration and non vibration components, including shaker deck, vibration beam, shaker screens, shaker deck bottom, etc, which is better for anti corrosion.

2) The sealing rubbers are applicable to SOBM, OBM and WBM, all types of mud, the unique patent design sealing rubbers can extend the working life of sealing rubber, to prevent the mud from leakage and for better sealing performance.
3) The vibration motor is DGMS approved, and also international explosion proof, such as IECEX, ATEX, CNEX.
4) The starter, cables, glands and other electrical components are all IEC explosion proof to meet the local requirement.

5) The high G force up to 7.5G to ensure the good performance of the separation, the deck angle adjustment by both ends simultaneously is user friendly design, so that the deck angle adjustment can be done by one worker easily without need another person’s join in.
6) The shaker screens are all made of composite material frame with SS316L material wire mesh for longer working life, we have passed the API RP13C TPI inspection, all of the screens are produced as per API RP13C standard.
7) The possum belly and tandem shale shaker skid are included, with the connection pipelines from poor boy degasser to trip tank, and the side discharge trough design can allow the drilling waste flows to the specific waste pit directly
We can also make triple shale shaker on one skid with possum belly and pipelines, and the desander, mud cleaner, if you need solids control equipments, pls contact with GN solids control.