Tag Archives: China Decanter Centrifuge Supplier

Horizontal decanter centrifuge has the advantages of good separation performance, well-adapted, can be automatic continuous operated, exercise intensively is small, small footprint and lower maintenance cost. So the decanter centrifuge had a rapidly development recent years, which can be widely used in industrial wastewater and municipal wastewater process field.

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Main feature of the decanters centrifuge compared with others:
1.1 Separation factor is high: Max 4000.
1.2 Ration of length and diameter is big: Max 4.2.
1.3low energy consumption: 1/3~1/2 of the same product.
1.4 Smoothness Of Operation : Parts precision dynamic balancing and the whole set machine work dynamic balance, vibration strength of the decanter is below 5mm/s, is fall far below 《Technical condition of decanter centrifuges》, 7.1mm/s.
1.5 Low noise: less than 85Db(A).
1.6 Operating reliability: DC company decanters differential mechanism adopt planetary gear transmission in high speed, and adopt pin-cycloid planetary gearing in low speed to improve the working reliablity. Spiral drive main bear use roller bearing and the structure of the thrust ball bearing which can improve the bear ability of the Axial force.
1.7 Wear-resistant treatment: The touching part of our company is made of stainless steel and superior alloy steel, the blades of screw pusher paint abrasion- resistant alloy or spectacles special cemented carbide.
1.8. All kinds of models: The diameter series of the decanter produced by our company are 250、350、450、550, slenderness ratio is 2. 3. 4. ect.

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DC decanters centrifuge  widely used in oil, chemical, light industry, mining, metallurgy, food, environmental protection and ect, which can totaly meet the requirements of dehydration of solid, and liquid phase.

Drilling fluid centrifuge is the fourth stage separation equipment in solid control system. Centrifuges can be used many industries, such as oil&gas drilling, waste water treatment, food and chemical industries.

And the decanter centrifuge is widely used in oil& gas drilling. Decanter centrifuge is used in drilling mud system for separating suspension of solids phase with particle diameter(d≥2μm) for drilling mud circulation and drilling fluids recycling. Ruggedly built for oilfield and industrial services, drilling mud centrifuge is especially effective in environmentally sensitive areas.

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Drilling mud decanter centrifuges are equipped with either fixed or variable speed arrangement on the main drive enabling the operator to adjust the bowl speed between 1200 and 3850 rpm within a few seconds.  This option, combined with variable conveyor speed, gives a unique dimension to the use of decanters for drilling fluids treatment. The optimum speed for solids removal for a specific cut point depends on the composition of the drilling fluid and the nature of the drill cuttings.

decanter centrifuge

The liquid drilling mud is fed into this long cylindrical bowl, where the centrifugal force presses it outwards to form a layer – known as the pond – around the wall. The thickness of this layer is determined by a series of discharge weirs at the end of the cylindrical section. The clarified liquid flows out over these weirs, with the aid of centrifugal force. Since the solids in the mud are heavier, they remain plastered against the bowl wall, and are continuously removed by the screw conveyor. They are then transported up to the conical section (known as the beach) where they exit via the discharge ports at the narrow end. Cleaned drilling mud exits at the opposite end.

A decanter centrifuge separates solids from one or two liquid phases in one single continous process. This is done using centrifugal force that can be well beyond 3000 times greater than gravity.

When subject to such forces, the denser solid particles are pressed outwards against the rotating bowl wall. While the less dense liquid phase forms a concentric inner layer. Different dam plates are used to vary the depth of the liquid-the so-called pond-as required.

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The sediment formed by the solid particles is continusly removed by the screw conveyor, which rotates at a different speed than the bowl. As a result, the solids are gradually “ploughed” out of the pond and up the conical beach.

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The centrifugal force compacts the solids and expects the surplus liquid. The dried solids then discharge from the bowl. The clarified liquid phase or phases overflow the damp plates situated at the opposite end of the bowl. Baffles within the centrifuge casing direct flow path and prevent any risk of cross-contamination.

The speed of the screw conveyor may be automatically adjusted by use of the variable frequency drive(VFD) in order to adjust to variation in the solid load.

Decanter centrifuge is a important equipment in solid control system. It is widely used in drilling waste
management system and oilfield mud circulation system. According to 15 days efforts, the centrifuge have already finished and prepared to delivery.

The model of centrifuge is DCLW450-842N, bowl diameter is 150mm, bowl length is 842mm, rotary speed is
2200r/min and the max capacity is 40m3/h. The decanter centrifuge will used to oilfield.

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Features of the Decanter centrifuge

1. Can operate at full speed to finish feeding , centrifugal sedimentation discharge and other procedures ,
high degree of automation .
2. Optimized the settling zone parameters and feeding mode, enhanced the centrifuge sand removing effect,
performance can be comparable to the same specifications of the imported centrifuge .
3. Horizontal spiral unloading settlement centrifuge vibration are low noise. By improving the centrifuge
rotational part machining accuracy and the dynamic balance accuracy, of the centrifuge vibration and noise
dropped to a low level.

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4. The production capacity of the single machine is large, compact structure, small occupation, and can
automatically run, convenient maintenance, can be closed operation .
5. Simplified solid control system, low energy consumption , lighter working load, and the purification
efficiency increased by 30% than original .
6. Uses the frequency conversion governor, compared with similar products with low energy consumption,
working speed is adjustable etc.

It is used to dispose not aggravating drilling fluid and can eliminate above two kinds of harmful solid
phase; when dispose aggravating drilling fluid can eliminate redundant colloid in drilling fluid, control
drilling fluid viscosity and recover barites; disposing hydrocyclone bottom flow can recover liquid phase,
decrease the waste of fresh water and oil.