Nov 21

GN BIG BOWL CENTRIFUGE

By far, the decanter centrifuge is a quite efficient equipment for separating the solids from the liquid, which is widely used in many industries form the winery, plant oil to the energy industry like the oil and gas drilling, waste management, cuttings treatment and oily sludge separation. Not long ago, 2 sets of GNLW764-VFD centrifuges were delivered to a desert jobsite for a coal mine project, for washing the coals.
When a place is remote, especially in a desert place, all resources are more precious than usual. In that project, the decanter centrifuges are only a part of the whole project but are playing an important role. They are requested to run continuously and to treat around 100 cubic meter material in each hour, in order to save cost by two means: one is to collect the limited water to be reused in next washing procedure, the second is to dry the coal and finally change it into money. The more water to be recycled, the lower cost the project pay for, and the more coal to be collected, the more benefit the project earn from.
Decanter centrifuges are one of GN Solids Control’s core products, and GN has centrifuges for different applications, including: mining and other industry, oil gas drilling solids control and waste management for the cuttings and drilling mud, oily sludge separation works like the waste treatment in refinery and from tank cleaning, the animal waste treatment in farmlands, food industry like the plant oil and wineries.
In a word, an efficient decanter centrifuge helps the end user to cut cost, save money and increase the final products quality, like the purer liquid and drier solids. If you have such need for centrifuges or need more information about centrifuge, welcome to contact GN Solids Control for consultancy.

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written by shale shaker \\ tags: , , , ,

Nov 21

In last blog, we introduced the shale shaker and mud cleaner in a compact mud recycling system produced by GN Solids Control for the SINOPEC. In this system, there are in all 4 steps of separation, with the first step as shale shaker, second step as the mud cleaner with 1 of 10 inch desander cone and 8 of 4 inch sized desilter cones. The dewatering centrifuge is the fourth step separation for the fine particles left in the liquid.

cof

Why need a decanter centrifuge?
Till now, the decanter centrifuge is a second to none choice for choosing out the particles in the drilling mud between 2 to 5 microns. Even for finer particles, the decanter centrifuge can handle them by adopting a chemical dosing or so called flocculating unit.

How to choose a suitable centrifuge?
1. First of all, to choose a suitable size of centrifuge, the diameter of a centrifuge determines the treating capacity of a centrifuge. In this project, the end user chose GNLW363-VFD, with a 14 inch bowl diameter while the speed is typically 3200RPM, which is quite popular in drilling solids control and drilling waste management applications. Besides this most popular model, GN has centrifuges from small size as 9 inch bowl to big size up to 30 inch diameter bowl.
2. The centrifuge bowl diameter ratio determines the particle size to be separated out, for example, the longer centrifuge is, the dryer solids come out. Among GNLW centrifuge models, there are bowl length diameter ratios for option from 2 to 4.
3. And the higher speed a centrifuge has, the finer particles to be separated out. Per different speeds’ range, there are middle speed centrifuge and high speed centrifuge. Normally a middle speed means around 1800RPM, for example as the big bowl centrifuge GNLW452, with a typical speed as 1800RPM, and a bowl of 18 inch diameter, which is mostly used for barite recovering in a solids control system.

Welcome to send your project information to GN for more professional suggestions.

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written by shale shaker

Oct 27

Last week, one international contactor for mining industry started their project in Australia, among the separation line, two green colored equipment were significantly shown. They are big bowl centrifuges from GN Solids Control, a leading manufacturer for industrial separating equipment manufacturer based in China.

GN Solids Control has been designing and producing the separating equipment like shale shakers, mud cleaners, decanter centrifuges, vertical cuttings dryers for many years. At first, the equipment are mainly used for the oil and gas drilling solids control systems, and later, as GN’s quickly increasing development of technology and producing capability, GN Solids Control has enlarged its centrifuge model range from 14 inch bowl to bigger ones and smaller ones. Those 2 sets of GNLW764A decanter centrifuges are till now the biggest sized centrifuges made by GN Solids Control, with a bowl diameter of 30 inch and a treating capacity up to 120cbm/hr.

Besides the giant bowl decanter centrifuge GNLW764A-VFD, GN Solids Control has various centrifuge models with size as small as 9 inch diameter bowl, up to 30 inch diameter bowl, including the 14 inch bowl , 18 inch bowl, 22 inch bowl and etc.

GNLW764

For each size, there are different models available per different bowl length diameter ratios. Normally the comparably longer bowl a centrifuge has, a cleaner separation result it could give. Among GNLW series decanter centrifuges, take the 18 inch bowl diameter as example, there are different ratios like 2, 3 and 4. GNLW452 is a stout shaped decanter centrifuge with middle speed and shorter bowl, which is mostly used for barite recovery in a solids control system based on the barite size and gravity. GNLW453 is a high speed centrifuge for waste management systems, or as the dewatering centrifuge, for fine particles. While the GNLW454 is quite suitable for waste water separation with a longer bowl up to 4 times of bowl diameter, around 61 inches.

GNLW764, the 30 inch bowl diameter centrifuge has a bowl length-diameter up to 4. And this giant could separate quite fine particles at a large capacity, even after a dewatering unit.

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written by shale shaker \\ tags: , ,

Oct 23

In order to meet customers’ request and to help solve the problems faced in front of customers from the more and more strict environmental protection rules, GN Solids Control designed and put into market a comprehensive design for the oily sludge separation unit, and now GN Solids Control is leading in this industry.
In recent 3 years, GN Solids Control has customized several sets of similar systems, and such systems are being used in many different countries both in domestic China and overseas. It is widely used for treating the discharged slurry and sands from crude oil tank cleaning, oily waste discharged from refineries, and the viscosity oily waste from solids control for oil and gas drilling. It helps to reduce the cost for waste transportation and oil recycle, and gained good comments from under users.

OILY SLUDGE SEPARATION

A complete system is combined by several sections:
1. Pre heating and pre mixing system. In this system, a mixing tank with heating facilities are being employed. A chemical dosing system is used for adding some polymer or something else into the oily sludge and heating is used for reducing the viscosity. Later, the sludge is to be treated by a shale shaker, by which the large particles are separated out.
2. A high speed decanter centrifuge is used in next step for treating out the fine particles from the liquid. Floating unit is kind of oil water separation, and the light of weight oil will float on surface of liquid and it would be scraped out to an oil tank. The settled down particles would be drained from bottom of the IPC unit.
3. A disc centrifuge is used to separate out the small amount of particles from the liquid, and further separate the oil from water. Then the water flows into the water tank, while oil flows into the oil tank.
In the complete system, by using the complicated manifold and valves, the end user can bypass or invite into loop some equipment based on the sludge’s condition.

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written by shale shaker \\ tags: , , ,

Oct 16

It is a common knowledge that in the solids control system for a drilling rig, no matter for the land rigs or for the offshores, the shale shaker plays the most important role for separating out the solids waste from the mud recycling unit, and it is also the shale shaker which waste the most of the liquid on the cuttings discharged from the shaker. That’s why, in many countries, there is a must to equip another drilling cuttings treatment system alongside the rig.
A drilling cuttings waste management system is used for further separation of the drilling waste discharged from the shale shaker and mud cleaner, most of which are from the shakers. For one thing, the drilling cuttings waste management system helps to dry the cuttings for later transportation, on the other hand, it increased the drilling liquid amount to be recycled. Both are saving money. In case of OBM mud, the operators always need a vertical cuttings dryer and a high speed decanter centrifuge, while for WBM mud, operators always use a high G drying shaker and a decanter centrifuge.
In some cases, the ViST Shaker screen device could replace the drilling cuttings waste management system, or at least to some degree, reduced the work for the cuttings separation works. Generally speaking, the ViST shaker screen device has following advantages:

ViST shaker device

1. It is suitable for both WBM and OBM mud in a solids control system.
2. It is a compact structure, and only use an air compressor as power source, and one set of ViST could serve up to 3 sets of shale shakers.
3. It is designed to be suitable for different shaker models.
4. In practice, it helps to save the liquid amount by 30% to 50%.
Now for GNZS703 and GNZS594 series shale shakers, there are ViST device for option.

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written by shale shaker \\ tags: , , ,

Sep 25

Although in recent years, a large percentage of GN Solids Control’s products are sold to different industries besides the solids control projects, solids control systems and equipment are still GN’s traditional business of which GN’s brand is still quite well known and widely accepted. And GN customers in oil and gas solids control industry are introducing some of GN new products into their traditional works.

gn powerful vacuum pumps

vacuum pumps

Vacuum pump is one of the most popular products of recent 2 years ever since GN firstly showed one of such pump with a capacity of 40 cbm/hr in CIPPE Oil Show in Beijing for year 2017. In the following year, also in CIPPE oil show, GN showed another model alongside with GNSP-40A, which had half capacity and need half air consumption, with a compact and movable design, the GNSP-20A.

The vacuum pumps are quite powerful small machine. It could handle a material with quite large particles size, as long as the particle could pass the hose’s diameter, and with some liquidate. Such like the sands and small stones. Talking about transportation power, take the GNSP-40A for instance, it can suck the material from 50 meters away and deliver it to more than 100 meters away. Now it is widely used in oily sludge separation systems in refineries, in chemical industries, for tank bottom cleaning works, and for drilling cuttings transfer in oil and gas drilling.

Comparing with other pump types, like the GNSB series centrifugal pumps GN provides for the desander/desilter feeding, for the jet mud mixing, or with the submersible slurry pumps for feeding the centrifuge and sucking mud from mud pit, the vacuum pump, although powerful, it has some shortcoming like non continuous operating. But GN engineers are working on it, in order to find some solution. Let’s see.

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written by shale shaker \\ tags: , , ,