decanter centrifuge

This week GN solids control shipped one batch of solids control centrifuges for drilling mud treatment to Russia.
The decanter centrifuge model is GNLW363CG, which is the best sold model and the most popular model. The technical specification is as below:


Bowl diameter: 360mm ( 14 inch)
Bowl length: 1270mm (50 inch)
Design capacity is 200gpm, the normal capacity for drilling mud treatment is 132 gpm. The max bowl speed is 3900 rpm, the typical bowl speed is 3200 rpm, max G force is 3063G, typical G force is 2062 G, the separation cut point is 2 ~5 microns, by adding flocculants, the separation cut point is up to 1 microns. The differential speed is 38 rpm for high speed decanter centrifuge, for variable frequency drive decanter centrifuge, the differential speed is 0~45 rpm. The gearbox ratio is 57:1, main motor power is 50 HP, the back drive motor power is 15HP, the matching pump motor power is 11HP. For different material conditions, the actual treating capacity will be various.


The universal features of GN decanter centrifuge:
1) The bowl assembly is made of duplex stainless steel 2205, which lasts longer than SS304 & SS316L , the other bowl components are made of stainless steel 316L.
2) The screw is made of stainless steel by centrifugal casting, the open impeller design increase the treating capacity and improve the performance.
3) The fluids distribution port and solids discharge port are all protected by tungdten carbide alloy and it is replaceable.
4) The screw propeller is protected by tungsten carbide tiles, which is abrasion resistance material , and once damaged, the tiles can be replaceable.
5) The bearings are SKF brand which can last long time.
6) The main motor, and back drive motor are installed in one side for convenient operation and compact design.

Coronavirus disease (COVID-19) is an infectious disease caused by a new virus. Last updated: March 29, 2020, 09:58 GMT,Total Coronavirus Cases: 668,705,total death: 31,065, Recovered:143,107.

China also suffers huge losses from Coronavirus since January, 2020. People are suggested to stay at home for several week until the conoravirus is under control in China basically. Now all the Chinese are suggested back to work and recovery production and back to normal life, in the meanwhile, temperature checking is everywhere when you enter into a building or community, and movement tracking is necessary to be reported for quickly track the source of infection, and we are still required to wear disposable mask when you are in public area, including office. GN solids control are permit to recovery production partially since Feb. 20th, and until March 15th our production is recovery 100% as per government’s instructions.
As one of the top manufacturers of solids control equipments and drilling waste management equipments in China, GN solids control is also worked as a responsible company, we keep goods reputations during the past 10 years , and we got repeat orders from our valuable clients every year. Many clients from countries and regions with Coronavirus severe epidemics request us for Masks, it becomes more and more difficult to buy masks in their country. To support our VIP clients in the most tough period and flighting coronavirus together, we can provide Free Medical Face Mask for our clients in the world. If you need medical disposable masks, pls contact your direct sales or email to sales@gnsolidscontrol.com for Reservation.


GN solids control is trying our best to finish the existing order and ship them as soon as possible, also we are preparing stock for the most popular equipments like shale shaker, decanter centrifuge, vertical cuttings dryer, shaker screens frames( so that we can fastly finished the composite material shaker screens orders).

Recently GN solids control shipped another set of decanter centrifuge for oil sludge treatment to Brunei. The oil sludge treatment equipments in this project including:


1. Shale shaker: the function is to separate coarse solids from the oil sludge, the discharged solids can be collected by waste container, the fluids can be feed to decanter centrifuge by screw pump for further treatment. If the user do not want to use coarse solids shale shaker, they can use a filter instead, but the coarse solids content should be very small.
2. Decanter centrifuge: The decanter centrifuge is to separate fine solids from the oil sludge, the cut point is 2~5 microns, by working with chemical dosing unit, the centrifuge separation performance could be improved.
3. Chemical dosing unit: the chemical can be added in pre-mixing process, decanter centrifuge process, disc centrifuge process( for oil water separation). Proper chemicals will improve the separation result. The user can do a laboratory test to choose correct type chemical.


4. Mud tank: Including pre-mixing tank( if applicable, some clients do not have this process, but they need to ensure proper chemical jetting and mixing for the original oil sludge with proper solids content, density, viscosity), shale shaker tank, decanter centrifuge tank, buffer tank for oil and water, etc.
The client do not buy the complete oil sludge treatment system, only part of the equipments. Vacuum pump is widely used to pick up oil sludge from waste pit. It can be also used to transfer drilling cuttings, waste oil, dredging slurry, oil contaminated soil, sand, industrial waste water, etc. materials.
The vertical centrifuge is used to separate oil, water and solids, the recovery oil and water will be storaged in the buffer tank , then flow to the storage tank automatically. For more information, pls contact with GN solids control.

GN solids control has one unit of compact design oil sludge separation system in stock for sale, the treating capacity is 1 m3/h of oil sludge, the electric motor and control system are all with explosion proof which can be used for oil industry and crude oil refinery.
The technical specification is as below:


1) Pre-mixing modular: including one premixing tank which equipped agitator on top and electric heating lines internally. This is important process to separate oil easily and increase the oil sludge flowability.
2) Coarse screening modular: one unit of mini shale shaker to separate coarse solids from the oil sludge, the discharged fluids drop into the second tank with heating lines inside the tank. A feeding pump transfer the discharged fluids from shale shaker to decanter centrifuge by adding proper chemicals before feeding.
3) Decanter centrifuge to separate fine solids from oil water fluids mixture, the mechanical cut point is 2 microns. The normal speed is 4500rpm with VFD control panel, the bowl material is made of duplex stainless steel.


4) Disc centrifuge to separate oil and water and solids, the clean oil is storaged in a buffer box and the discharged water flow to another buffer box, which can be reused in the circulation system.
5) Chemical dosing unit to add proper chemicals into the oil sludge for easier separation and reach better result.
The system is compact design which can be shipped by containers, for big project of oil sludge treatment, the client can use this system as a testing unit before order a big oil sludge treatment, we have 5m3/h, 15m3/h big oil sludge treatment system for option. Normally vacuum pump is used to transfer the oil sludge from waste pit to our system.
For more information of the oil sludge treatment system, pls contact with GN solids control.

One set of dewatering centrifuge package is shipped to Southeast Asia for TBM mud treatment and water recovery project. This is not the first dewatering centrifuge package to be used for TBM mud dewatering project, we ever used it for similar projects several years ago, pls check the working video from our website: https://www.gnsolidscontrol.com/video/gn-solids-control-drilling-mud-dewatering-system-working-video


If you need the customized solution of huge volume mud treatment for TBM, Tunneling, Piling projects or other pipeline laying projects, pls contact with GN solids sales.
The technical specifications are as below:
1) 1 unit of GN dewatering decanter centrifuge laying into the 20ft container, the max speed is up to 3900rpm, the normal operation speed is 3200rpm, with separation cut point by mechanical separation is 2~5 microns. The max G force is up to 3063G, the normal G force is 2062 G, the bowl is made of duplex stainless steel 2205, the screw is made of stainless steel 304. The fluids distribution port and solids discharge port is made of tungsten carbide inserts and it is replaceable. The screw impeller is protected by tungsten carbide tiles for longer operation time.


2) The chemical dosing system installed into a 20ft container, including 3 compartment tank with chemical feeding hopper, agitator, piping system and bracket, PLC control panel and chemical dosing pump. Normally flocculants will be added by the chemical dosing system to the decanter centrifuge feed pipe, so that the ultra fine solids will be accumulated to bigger size solids, the decanter centrifuge can separate them easily, it will increase the separation performance of the high speed decanter centrifuge.


3) The container equipped with doors, windows, air conditioner, lightings, etc. accessories for customer’s requirement. The 2 container design is customized design, usually we will put everything into a 40ft container for convenient transportation or without container as per client’s option.