Tag Archives: GN Decanter Centrifuge

GN Dredging System to Separate Finer Solids

GN Solids Control is leading solids and liquid separation manufacturer. GN whole product line includes shakers, desanders, desilters, decanter centrifuges and cuttings dryers. GN Solids Control provides standard treating system to meet customers urgent demands, while for those customers have special demands, GN Solids Control also provides customized solutions.
Recently, GN Solids Control has received many inquiries on the dredging slurry treating. In the past, GN Solids provided many slurry treating systems with shakers, desanders and desilters. As we know GN desilters are assembled with 4 inch cyclones, they can separate the solids larger than 25 microns. While some other customers have higher demands on the slurry particles, GN Solids Control recommends using decanter centrifuge with flocculent system.
Generally speaking, typical dredging slurry includes 5~20% solids, 0~70% coarse debris (usually larger then 6mm),10~100% sands (diameter is around 0.07~6mm) and finer particles like clays or silts or organics 0~100% (diameter is less than 0.07mm). In order to separate out those finer solids, GN centrifuge is a necessary choice.
Let’s take one GN 350GPM treating system as an example:
1. Double deck shaker
GN double deck shaker is using opening mesh screen on the top deck to separate the large materials out, while the bottom deck shaker is using common composite API shaker screens.
2. Desander
One GN 10 inch desander cyclone is used after the double deck shaker. Desander cyclone to separate the solids larger than 55 microns. One centrifugal pump is also fixed on the tank to feed the cyclone.
3. Flocculent System
GN flocculent system has a compact structure, all the devices are put in one 20ft standard container. Flocculent will be mixed thoroughly with the slurry separated from desander, those slurry is feed into the GN centrifuge by GN screw pump.
4. Decanter Centrifuge
Two sets GN decanter centrifuge GNLW453 are used for treating finer solids. As the flocculent system helps to collect all those finer solids and get larger, they will be easily separated out by GN centrifuge. Due to the increasing of the gravity, the solids percentage is getting bigger, so centrifuge actual working capacity is around 350GPM.

GN Decanter Centrifuge and Shaker for Middle East Client

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GN Solids Control just got another repeated order on decanter centrifuge and shaker from one Middle East client. Although the oil price is still very low, many drilling companies are stilling drilling, anyway, if you drilling then you can make money. On the same time, you need to think about to use a very good equipment to do the work and save cost.
GN Solids Control manufactures over 300 set decanter centrifuges and 500 sets shale shakers every year, most of which are using in the oversea market. Thousands of successful projects have been proved to be worth use GN Solids Control equipments and drilling waste management systems.
As one branch company locates in Houston, TX, USA, GN Solids America LLC has one warehouse which keeps many shakers, decanter centrifuges and cutting dryers in stock. This project is made due to GN Solids America has these equipments in stock and can be arranged for delivery immediately. This Middle East client came to GN Houston warehouse and checked those decanter centrifuges and shakers before make the final purchase order.
1. GNLW363 Decanter Centrifuge
This is the star products made by GN Solids Control, with the treating capacity of 130 GPM, excellent rotating bowl made of duplex stainless steel, screw propeller edges are covered with hundreds pieces of tungsten carbide tiles. Many large companies are also using GN Solids Control decanter centrifuges such as Shell, Baker Hughes and Halliburton etc.
One VFD control cabinet is also used; all those parameters such as the bowl rotating speed, and differential speed etc can be changed easily on the HMI.

Decanter Centrifuge
2. GNZS594 shale shaker
GNZS594 shaker is using USA made Martin vibration motors for long time usage, large thickness metals are using to make the shaker deck in order to have a better linear motion. There are 4 pieces shaker screens fixed on one 594 shaker. Shaker screen size is the same with Mi-Swaco mongoose.

GN Shakers in Houston

Different Usages for GN Cuttings Dryer and GN Hi-G Shaker

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GN Solids Control manufactures 60 sets to 100 sets cuttings dryers every year. It can be used to separate OBM or WBM. Usually, in order to save cost the Hi-G shaker will be a replacement solution to separate the WBM, while the cuttings dryer can be used to treat OBM.
For the cuttings that separated by shale shaker, mud cleaner, it contains around 20% oil. Then these cuttings will be feed into the cuttings dryer. If we use GN High G Drying Shaker, normally we can get the oil on the cuttings around 10-12%. But if we use GN cuttings dryer, we can get the oil on the cuttings to be 3-5%. For every 100 Tons drilling cuttings, without using TDU to heat the drilling cuttings, our clients can recycle additional 7 Tons oil.

The treating capacity of GN vertical cuttings dryer is around 30~40 Tons/H. Solids that larger than 250 microns will be separated out, while the smaller size solids will be left in the drilling fluids.
The wet material enter the TDU will reduce the capacity dramatically as we know. The solids come out from GN cuttings dryer and GN Hi-G shaker can be send to TDU for further separation, but due to the oil in the cuttings is not the same ( 3-5% OOC cuttings after treated by GN cuttings dryer and 10-12% OOC cuttings after treated by GN Hi-G Shaker), the difference is pretty obvious. By using the cuttings dryer, it will increase capacity of the TDU, and the electricity cost will be saved.

The wet material will also increase the load of the other unit of TDU system. Like the Vapor Recovery Unit, Cooling Tower Skid, Oil water separator etc. As we know, the capacity for TDU is very small if the material especially when the materials are very wet.
Generally Speaking, considering the TDU don’t have a large treating capacity, so the cuttings can be treated by one GN cuttings dryer, one GN Hi-G shaker. Sometimes, you also need one GN decanter centrifuge for much finer solids separation.

GN Cuttings Dryer and Decanter Centrifuge for Sinopec

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GN Solids Control has been working in the area of drilling waste management for many years, we are proud to say GN has leading this industry since the beginning. Until now, GN cuttings dryer and decanter centrifuge are still the most successful and practical products in Chinese market as well as in the foreign countries. Many large clients are using GN solids control and drilling waste management systems, and they give high praise for the good performance. Clients such as Baker Hughes, Shell etc are using GN products for their oil drilling.
For the domestic market, GN solids control and drilling waste management systems are always the first choice when we consider the working performance, product quality and after sales service. GN just provided 3 sets of drilling waste management systems to Sinopec project in Shandong province. These equipments are as follows:
1. GN Vertical Cutting Dryer
Sinopec purchased 3 sets of cuttings dryer GNCD930C from GN. These dryers are especially used for OBM, WBM or SBM treatment. Treating capacity is ranging from 30T to 50T based on the separating materials.
Now GN has upgraded the cuttings dryers to D version, rotating speed of the screen basket is 1200 RPM comparing the former 900 RPM. And the D version cuttings dryer is much more compact than the C version.

2. GN Decanter Centrifuge
Here they are using GNLW363CG centrifuge with fix speed. GN centrifuge has excellent working performance. All the screw propellers are protected by tungsten carbide tiles which are pretty helpful for anti-abrasion. GN centrifuges are using genuine bearings from SKF which can be used for long time.

Besides GN363 centrifuge, GN also has some other types of centrifuges in different bowl dimensions. Some are especially used for large treating capacity such as GNLW553 with 22 inch rotating bowl, and some are widely used on diamond drilling or coring drilling area such as GNLW223 centrifuges with 9 inch rotating bowl.
This year GN Solids America will exhibit one D version cuttings dryer and one GNLW553 centrifuge in the OTC show. Welcome to visit our booth if you have time.

GN Drilling Waste Management Systems

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GN Drilling Waste Management Systems
GN Solids Control has many experience engineers in waste management area. In order to meet the demands of environment protection and make money from the waste oil, using GN drilling waste management systems would be one cost effective method.
GN drilling waste management systems is a pretty standard system mainly including one GN cuttings dryer and one decanter centrifuge, two positive pumps (one for cleaning and flushing the cuttings dryer when the work is finished, the other one is used for feeding mud into the decanter centrifuge), skid and tank as well as some other auxiliary equipments such as ladders, walkways, guiderails and lights etc.
In order to operate GN drilling waste management systems conveniently, GN designers take the working conditions into consideration. The whole systems are pretty compact, while the operators have large room for work.
GN cutting dryer is quite effective for OBM, WBM or SBM treating. When using GN dryer, on one hand you can separate the solids out from the waste mud, on the other hand you can reclaim some precious oil which can be used for further treatment and sell to make profit. From this point, treat the waste oil can reach the aim of protecting environment and make money.
Solids come out from the waste mud contain a little bit oil, according to the discharge standard, these solids can be discharged directly without any further treatment due to the oil is less than 5 percent.
As to the WBM treating, GN dryer also can perform excellently. Solids usually contain less than 10% water. These solids can be transported to other places after 2 or 3 days nature dry.
Fluids come out from cuttings dryer can be sent to decanter centrifuge for further separation. All the solids larger than 2 or 3 microns can be separated out.
GN drilling waste management system can also working in harsh environment which is very cold. Last December, some sets of GN drilling waste management systems are using in Russia, where the temperature is minus 40 ℃.

GN Solids Control has many experience engineers in waste management area. In order to meet the demands of environment protection and make money from the waste oil, using GN drilling waste management systems would be one cost effective method.
GN drilling waste management systems is a pretty standard system mainly including one GN cuttings dryer and one decanter centrifuge, two positive pumps (one for cleaning and flushing the cuttings dryer when the work is finished, the other one is used for feeding mud into the decanter centrifuge), skid and tank as well as some other auxiliary equipments such as ladders, walkways, guiderails and lights etc.
In order to operate GN drilling waste management systems conveniently, GN designers take the working conditions into consideration. The whole systems are pretty compact, while the operators have large room for work.
GN cutting dryer is quite effective for OBM, WBM or SBM treating. When using GN dryer, on one hand you can separate the solids out from the waste mud, on the other hand you can reclaim some precious oil which can be used for further treatment and sell to make profit. From this point, treat the waste oil can reach the aim of protecting environment and make money.
Solids come out from the waste mud contain a little bit oil, according to the discharge standard, these solids can be discharged directly without any further treatment due to the oil is less than 5 percent.
As to the WBM treating, GN dryer also can perform excellently. Solids usually contain less than 10% water. These solids can be transported to other places after 2 or 3 days nature dry.
Fluids come out from cuttings dryer can be sent to decanter centrifuge for further separation. All the solids larger than 2 or 3 microns can be separated out.
GN drilling waste management system can also working in harsh environment which is very cold. Last December, some sets of GN drilling waste management systems are using in Russia, where the temperature is minus 40 ℃.

Decanter Centrifuge Package for Solids Control Industry

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GN Solids American is dedicated to the supply of quality equipment and fast service. GN Solids American a full range of decanter centrifuge manufacture offering 9 inch bowl, 14 inch bowl, 18 inch bowl and 22 inch bowl decanter centrifuge. GN Houston sale and service center is providing the complete centrifuges and after-sale service.

GN Centrifuge Simple Working Principle:
The centrifuge is fed by a feeding tube, which is a hollow shaft connected with the screw. As long as drilling fluids enters a feed compartment and is accelerated to go into the rotating bowl. Once solids go inside the bowl, centrifugal power forces heavy solids settle on the bowl wall and subsequently discharged. The liquid will fill the bowl of fluids dam and flow out.

Recently, we have sold three sets of GNLW363 14 inch bowl centrifuge, one set of 22 inch bowl centrifuge and one set of 9 inch bowl centrifuge to Middle East. I briefly explain those three models of centrifuge.

1. GNLW363 centrifuge is GN Classic centrifuge which is 14inch bowl diameter and 50 inch bowl length. The effective capacity is 132gallon/minutes with IEC explosion proof standard. Tungsten carbide tile protection and top brand bearings assure the premium quality

2. GNLW553 is the biggest centrifuge in GN centrifuge series. 400gallon/minutes capacity with advance VFD control panel will meet and exceed most customer expectation. It mainly used in the oil and gas drilling application and dewatering system.

3. GNLW223 is the mini centrifuge which is only 9 inch bowl small footprint. High rotating speed and stable working performance are welcomed by the most of diamond drilling company. It specializes to separate the fine solids from drilling fluids.

Except those models, GN also supplies the 18 inch bowl centrifuge for recycling drilling fluids. Currently hundreds of GN decanter centrifuges are working worldwide to produce a high value to contractor. With experienced engineer and innovative technology, GN is capable of increasing value to your project.