May 29

The main functions are as follows:

 (1) The control system has two operating conditions: manual control and automatic control: in the manual control state, various system parameters can be adjusted and set during operation; in the automatic control state, the system parameter settings are adjusted. The flow rate and dosing amount of the feed pump are controlled by the concentration meter in the sludge tank. The dosing amount and dilution water amount are controlled fuzzyly according to the turbidity of the separation liquid of the decanter centrifuge. The control system is an intelligent automatic control process.

    (2) With automatic and continuous measurement of the rotating speed and differential speed of the centrifuge;

    (3) It has status monitoring, fault alarm, data display and print report of various operating parameters of the system;

    (4) Automatically save mud volume through concentration detection, so that the centrifuge is always in the best working state;

    (5) It has system working status, alarm signal, various operating parameters and historical records transmitted to the host computer;

    (6) Monitoring and display of parameters such as current, voltage, flow rate, host speed, differential speed, pushing torque, running cumulative time, temperature, etc .;

    (7) With dynamic screen display and parameter setting of each operation unit;

    (8) Through the network configuration software of the host computer, remote fault diagnosis function can be realized; animation display of operating status; real-time data report; historical data search;

(9) The entire control system is fully automatic controlled by PLC + LCD touch screen, so that the system is in intelligent full-automatic operation in operation, which is an ideal turnkey project.

Four ways of processing industrial sewage:

A. Physical method: use physical action to separate suspended matter and emulsion in wastewater. Common methods include grille, sieve, decanter centrifuge, clarification, filtration, and oil separation.

B. Chemical method: the use of chemical reaction to remove dissolved substances or colloidal substances in water. Common ones include neutralization, precipitation, redox, catalytic oxidation, photocatalytic oxidation, micro-electrolysis, electrolytic flocculation, and incineration.

C. Physical and chemical method: Physical and chemical effects are used to remove dissolved or colloidal substances in water. Common methods include coagulation, flotation, adsorption, ion exchange, membrane separation, extraction, stripping, stripping, evaporation, crystallization, and incineration.

D. Biological treatment method: the use of microbial metabolism to convert organic pollutants and inorganic microbial nutrients in wastewater into stable and harmless substances. Common methods include activated sludge method, biofilm method, anaerobic biological digestion method, stabilization pond and wetland treatment. The biological treatment method is divided into aerobic treatment (such as activated sludge method, biofilm method) and anaerobic treatment (various anaerobic digestion methods) according to whether oxygen is supplied.

written by Decanter Centrifuge

Mar 12

News: GN Decanter Centrifuge for Oil Sludge Treatment to Brunei

This GN Decanter Centrifuge is specially designed for Oil Sludge Treatment and exported to Brunei.

2020.03.12 Decanter Centrifuge for Oil Sludge Treatment

Oil sludge is a mixture of oil, water and solids. Treatment with oil sludge would recover a lot of oil and water for reuse.
It is also an ideal solids disposal solution. The more oil and water are extracted, the more energy and resources could be
saved. GN oil sludge treatment products mainly include decanter centrifuge, oil-water separator and thermal desorption

GN P-series decanter centrifuge is mainly designed for the dewatering purpose. The beach angle of this series is 11
degrees. It is widely used for maximum dewatering requirements of municipal and industrial wastewater sludge. The
dewatering decanter centrifuge is designed for easy separation material include large particle size, high density
difference of solid and liquid, low viscosity, high concentration, high treatment capacity and higher dryness than clarity.
The materials like sludge or wastewater containing fine particles usually need to be added with flocculants to gather the
fine particles condensed into large ones, and then dewatered with P series decanter centrifuge.


Drilling mud, environmental protection sewage, oily sludge, cutting fluid, sand washing water, mineral washing water, soda
white mud, salt mud dewatering, magnesium aluminum emulsion, steel-making wastewater, precision casting wastewater,
construction mud, tunnel mud, mine wastewater, industrial wastewater, organic wastewater, aquaculture wastewater, chemical
industrial wastewater, printing and dyeing wastewater, municipal sewage, river sludge, water plant sludge, lake sludge,
kaolin grading, calcium carbonate, bentonite, Silica, titanium dioxide, calcium sulfate, barium sulfate, conductive film
glass polishing solution, aluminum hydroxide, cryolite, silicate, oil sand separation, landing oil, oil sludge, coal tar,
inorganic fertilizer, Chinese medicine extraction such as taxus chinensis, honeysuckle and liquorice, clarification,
concentration and dehydration of salt crystals, etc.

2020.03.12 Oil Sludge Treatment Equimpent

GN can not only provide users with Dewatering Decanter Centrifuges, but also provide users with turnkey solutions for
dewatering process, including solutions for material transportation, classification and dewatering. Rely on GN’s rich
production line of separation and conveying equipment, more and more reliable and advanced equipment will be manufactured
for users all over the world.

written by Decanter Centrifuge \\ tags: ,

Nov 30

GN Solids Control is one of the largest solid control and waste management companies which specializes in manufacturing the related equipment, such as shale shaker, desander, desilter, mud cleaner, vacuum degasser, mud gas separator, decanter centrifuge, agitator, centrifugal pump, cutting dryer, screw pump, shear pump, mud gun and so on. After 10 years development, GN has promoted its products to over 60 countries and now it also established two overseas subsidiaries, US and Russia.

Dilution is used to control the solids content of the drilling fluid prior to introduction of the mechanical solids removal equipment. A typical dilution procedure requires dumping a portion of the active drilling fluid volume into a waste pit and then diluting the solids concentration in the remaining fluid by adding a suitable base liquid such as water or synthetic oil. For more than 60 years, the use of solid state control equipment to minimize dilution has become standard practice in the drilling industry. The equipment and methods changed during that time, but the basic principles behind the process are not yet:

Solid Concentration Substance – Increasing solids content is detrimental to fluid performance.

Economic issues – Mechanical removal of solids costs less than dilution.

Quantity is important – the amount of waste produced represents performance.

Size is important – tiny solids are the most harmful and difficult to remove.

Stokes’s law is important – viscosity and density affect gravity separation.

Shaker Selection – The shaker screen is uniquely separated according to size.

Footprints are important – the available space for rig equipment is always limited.

GN Solids America can be your one stop shop for all your solids control equipment needs. Hopefully it will be useful to you. We will try our best to assist your business to be successful. Welcome to visit and please send your inquiries to


written by Decanter Centrifuge

Jun 17

Comparing with other solids control equipment like the shale shaker, desander, desilter and other equipment, the decanter centrifuge clearly need more attention and more care during operation in order to make sure a good performance, especially on the 24*7 running jobsites.
As the leading manufacturer of solids control and waste management manufacturer in China, GN has been producing hundreds of decanter centrifuges and GN centrifuges are working all over the world, GN has following tips to share with the decanter centrifuge owners or operators.

a good choice of centrifuge

GN decanter centrifuge

1. Before confirming the model, collect as much as information including the those points: the jobsite condition, like the temperature, the end users’ special request like the EX standard (ExdIIBT4? IEC EX? ATEX or Gost?), the allowable max electric current, and electric specification of the jobsite(380V, 50HZ? 460V, 60HZ? 415V, 50HZ or others?). And try to collect as much information of the material to be treated, the largest particle size, the solids contents before treatment, and the allowable largest particle size and solids content after treatment. A right choice of decanter centrifuge is the precondition of its good performance. Those are GN Centrifuge Models for your reference.
2. Before installing and commissioning of the decanter centrifuge, read the user’s manual carefully and get a general idea of the specific model of decanter centrifuge and the control panel. Normally, the VFD controlled decanter centrifuge is more complicated to operate, the operator need to have both mechanical and electric knowledge to handle it, at least for operate it.
3. Assign a specific professional engineer or operator for each decanter centrifuge. His work is to observe the condition of the decanter centrifuge and discover any problem at the first time and solve it. Because the centrifuge is high speed running machine, and when the mud condition changed a bit, it affect the performance and the centrifuge service life.
4. Lubricate the centrifuge on time, especially the bearings. Like GNLW363CG decanter centrifuge, the bearings are original SKF bearing. Good bearings ensure a longer service life on basic that you maintenance them carefully. Per manual’s instruction, some points of decanter centrifuge need to be lubricated every shaft and some need to be lubricated after running some hours.
5. A standard equipment is designed for common conditions, but not for all. In some cases, the end user need to make the jobsite condition to suit the equipment, like to make some isolation for keeping the equipment warm or cool, sometimes, the end users even put the decanter centrifuge in a air conditioned room or container to get an ideal performance.
May you have more questions or need more information, welcome to contact GN freely.

written by GN Decanter Centrifuge \\ tags: , , , , , ,

Jun 02

Two weeks ago, GN sales team members and GN top management were back from Houston, USA. They went to Houston for the yearly oil and gas festival, the OTC Oil Show. This OTC was a success for GN. Most of GN’s equipments in stock in Houston warehouse were sold out and GN Solids Control’s name was better spread among the oil drilling and oil service companies.

After the OTC Oil Show, GN staff in USA branch has to be busy for a while for packaging the equipments and deliver them to the buyers.

GN Solids Control in OTC


This OTC, GN has two stands, one is in Chinese companies’ area. Even before GN set up the branch with name of GN Solids America in USA, GN’s brand was known to many companies in the world. Now this brand becomes more and more famous.

Of course, this is not only because of the Oil Show, the more important reason is that GN’s products are of high quality and good performance. What are GN’s core products and which are the best sellers?

  1. GNLW363CG Decanter Centrifuge. Decanter centrifuge is not only used in solids control, but also, more widely used in waste management systems. unless other solids control equipments, centrifuge shows more about a company’s producing ability. It could be used for solids control, drilling cuttings waste management equipment after the VG dryer or the high-G shaker, and also plays as dewatering centrifuge for drilling fluids.
  2. GNCD series vertical cuttings dryers. Comparing with decanter centrifuge, it is a new product. It is designed originally for the oil based mud drilling cuttings waste management. But as some GN clients are using it in water based mud also, GN now designed the 5th generation with new material in order to deal with the water based mud. Now more than 50 sets of GN vertical cuttings dryers are working in many countries in the world and the feedbacks are better than OK.
  3. GN shale shakers and high G shakers. The shakers, solids control shakers and high G shakers for waste management systems are both important, they are used to separate out most of drilling cuttings.

4. GN shaker screens. GN make high quality of shaker screens for both GN’s own shaker and other brands’        replacement shaker screens.

written by GN Decanter Centrifuge \\ tags: , , , , , , , ,

Jun 02

Days ago, GN Solids Control cooperated with an outdoor team and held an activity in suburb Beijing for a one day journey. GN sales team attended this journey and the journey was fruitful and meaningful.

Marketing department is a very important department of GN company, this department is combined by more than twenty youngsters who have a same goal and dream. This department includes three teams, the domestic sales team, the oversea market sales team and the marketing team, their duty is not only to get orders for the company, but also to collect information of the industry, receive feedbacks and tips from clients and also takes some responsibility for the after sale service for the clients. Most of their time is spent on work.

See GN's activities after work

See GN’s activities after work

But work shouldn’t be the only content of their life, and work is also fun. GN Solids Control’s products are exported to more than 60 countries and regions in the world, and for every time zone, there are GN’s clients. GN has branch offices and companies in USA and Russia and GN agents are in many countries. So GN sales are working per different time zones and always on business trip out of the country or out of the city. It is not easy to get a reunion for everyone.

This time, when we had this journey, there are still 7 members are absent. GN team sent greetings and pictures to them to share the joy.

For this journey, there are several activities arranged, it is not only test and compete for everyone’s IQ and EQ, but also, a challenge for everyone’s courage and team work attitude. All  assignments required a good team work and cooperation. When we are alone, we can not finish any of them, even without thinking of it. But when we work together, we face the same problem and we focus on the solution, we accomplished them all.

It’s just like the daily work, when we get together and share our ideas and experiences, it would be easier for us to get the best solution and make the full use of our resources. Only in this way, could our team be stronger and tougher.

Well done, and we will do better.

written by GN Decanter Centrifuge \\ tags: , , , , , ,

Apr 12

In the past CIPPE 2016, GN Solids Control brought its centrifuge family to the show, all the centrifuges from the 9 inch baby centrifuge to the 22 inch big brother centrifuge, standing in a row and visited by many visitors and end users.

Especially the GNLW363 Decanter centrifuge, both the old look one and the new design were shown in CIPPE 2016, and the new one was positioned on a skid. What’s the differences between each generations GNLW363’s?

1, first generation GNLW363, the original design for 14 inch decanter centrifuge, with the two motors on each side of the centrifuge. although the material used is better than others, the centrifuge is still an old looking one.


2, second generation GNLW363B, it is more international looking, as GN Solids Control has been selling its products to many countries and regions in the world, and GN’s products design became more and more international, GNLW363B decanter centrifuge’s motors are located on same side of the centrifuge, it allowed the operators to have more space for operation.

  1. third generation GNLW363C decanter centrifuge, for outlook, it is similar to GNLW363B, with two motors on one side. But there are more small but useful changes on GNLW363C, because the centrifuge was used for many applications since then, like the oily sludge separation, the dewatering unit and etc, with feedback from jobsites, GN re-designed it and better it a lot.

4, forth generation GNLW363D, the inside design is similar with GNLW363C, but the outlook is quite different, as the structure is more compact and total weight is less, easy for air shipment in case of urgent use.

For the same model of GNLW363D/C decanter centrifuges, GN has optional control panels like fixed speed control panel, VFD control panel of normal one, and the positive pressurized control panel with PLC smart touching screen.


written by GN Decanter Centrifuge \\ tags: , , ,

Apr 12

Last week, GN Solids Control was back from CIPPE 2016, Beijing and won big success. This year’s CIPPE accepted many visitors from many countries in the world, not only the domestic oil and gas companies. A great many engineers from CNPC, SINOPEC, and COSL and other oil companies and Oil drilling companies attended and visited the Oil Show.
GN Solids Control had a booth of 400 square meters, which was located in E2 Hall, on opposite of SINOPEC’s booth. As the leading solids control manufacturer in China, GN brought all main equipments for the oil and gas solids control, including the shale shaker, mud cleaner, decanter centrifuge of middle speed, and also the main equipments for the drilling cuttings waste management system, including the high-G drying shaker, the high speed decanter centrifuge, the vertical cuttings dryer and screw conveyors.

Among all above mentioned equipments, many are newly updated models, like the shale shaker, GN changed the feeding type and discharge chute. For the decanter centrifuge, with same function and material not changed, the structure is more compact than before. The vertical cuttings dryer was applied with new material for better performance for high viscosity treating media.
Also, as the core products of GN Solids Control, the whole GN Centrifuge family attended CIPPE, and made a perfect show. The centrifuges are ranging from 9 inch diameter bowl to 22 inch diameter bowl. They stand in a row and attracted many eyeballs not only of GN clients, but also GN’s peers. Some world well known centrifuge manufacturer sent engineers to GN’s booth to learn from each other and congratulated on GN’s success.
If you missed the CIPPE Oil Show but also need to see GN’s products, welcome to contact us for visiting on our headquarter which is only 40 minutes drive from Beijing Airport. Or you can see our products and staff at Moscow Oil Show in April, OTC oil show in Houston in May, Iran Oil Show in Tehran in May and Malaysia Oil Show in May.

written by GN Decanter Centrifuge \\ tags: , , , ,

Mar 23

Recently, the crude oil price is slightly picking up, and along with that, the oil service projects are recovering slightly. There are many urgent inquiries coming to GN for the equipments and spare parts. Since a lot of projects start urgently, the requests for equipments are urgent too. Most of clients need short delivery time, they turn to GN for assistance and GN, luckily for both of the manufacturer and the clients, currently has some stock for their use.

This time, the middle east client requested several sets of centrifuge units, with a short delivery time within 10 days. What he requested are GNLW363CG-VFD Decanter Centrifuges, feeding pumps mono pump and the centrifuge telescopic skids. The clients are using those centrifuge units for waste management projects.


The urgent order includes following equipments:

  1. GNLW363CG-VFD high speed decanter centrifuge.

GNLW363C series decanter centrifuges are most popular size used in oil and gas industry, like the solids control centrifuge and the waste management centrifuge. the 14 inch diameter bowl and max rotating speed up to 3900 RPM helps it to achieve good performance for extra fine particles separating, from 2 microns to 5 microns. And GNLW363CG is high standard configuration of GNLW363 series, of the best material for this kind of centrifuges, like the bowl material, SS2205 stainless steel, and the SKF bearings, and etc. If you need more information, welcome to see our website, to the centrifuge page.

  1. VFD control panel with PLC smart touching screen. This is not simple VFD control panel, it is the positive pressurized control panel with self cooling system. Unless the flame proof control panels which are used to block out the outside atmosphere, the positive pressurized control panel adopts an air compressor to input the compress air and not let in the flammable air.
  2. mono pump for feeding the centrifuge. Mono pump is also called the positive position pump, the rotor and stator in the pump evenly and steadily feed the material into the centrifuge. it is the best solution as a centrifuge feeding pump.

Now the equipments are ready to deliver.

written by GN Decanter Centrifuge \\ tags: , , , , , , ,

Mar 23

Comparing with the VFD Controlled decanter centrifuge, the fixed speed one still has its benefits, like the compact structure as a whole with the decanter centrifuge and its control panel, and the easier operation, no need to adopt an extra air compressor, and etc.

But still, the VFD controlled decanter centrifuge is the only choice accepted by the end users. Because the positive pressurized control panel is more suitable for the high temperature conditions, and the easily changeable rotating speed, then the G force accordingly helps the VFD controlled decanter centrifuge to be suitable for more applications like the middle speed and high speed.

GN Centrifuge

GN Centrifuge on Skid

As the leading manufacturer of solids control and waste management systems and equipment, especially for the decanter centrifuges, besides the fixed speed decanter centrifuge, GN also produce normal VFD control panel decanter centrifuges and also the positive pressurized VFD control panels for decanter centrifuge. And GN Solids Control is the only China manufacturer who has positive pressurized control panel for option.

In order to change a fixed speed decanter centrifuge, take the best seller model GNLW363CG decanter centrifugethe end user need to change the 11kw back motor for the decanter centrifuge into a VFD motor and also prepare a VFD control panel for changing the fixed speed control panel.

About the VFD control panel, GN has double VFD ( centrifuge main motor and back motor), three VFD ( centrifuge main motor, centrifuge back motor and pump) for option. Depending the Exproof options, there are flame proof VFD control panel which is similar as other Chinese suppliers, and also the positive pressurized control panel for option. If the choice is a positive pressurized control panel, the end user should prepare an extra air compressor at jobsite as the air source of the control panel.


written by GN Decanter Centrifuge \\ tags: , , , ,