Tag Archives: Oilfield Centrifuge

DC Mud equipment company got an new order of decanter centrifuge from Thailand. Now the drilling fluid centrifuge wil delivering to the port.

Drilling mud decanter centrifuge is the fourth stage equipments for a drilling mud system.Drilling mud cleaning first stage uses drilling fluids shale shaker ,then second stage uses desander,third desilter,(now drilling mud cleaner is widely used to replace desander,desilter).

deacnter centrifuge

The high-speed, solids control decanter centrifuge removes ultra-fi ne drill solids of greater than 2 to 5 microns at an average process rate of approximately 20 percent of the mud pump flow rate, Anderson continued.

A centrifuge also can be used as a barite recovery system or dewatering system, a practice widely used in the oil and gas industry. The dewatering process, said Anderson, allows up to 100 percent removal of all suspended solids from the drilling fluid. The reclaimed water can be used to make up new mud for another job or as rig wash-down water.

DC Machinery is a professional manufacturer of all kinds of decanter centrifuges. We can provide many different fields used centrifuges, such as oil and gas, food, chemical and mine well industry. Below is a introductuion of the full hydraulic drive decanter centrifuge.

A centrifuge with hydraulic drive is an interesting object from the fluid dynamics point of view. To achieve high efficiency, the hydraulic resistance of the inner, quickly rotating with the rotor, passages should be minimised.

decanter centrifuge

At the same time the fluid should pass through an area far away from the axis of rotation, where the centrifugal force is greater. Nozzle efficiency is crucial. The air in the gap between the rotor and the centrifuge cover also moves, and the air friction makes a
significant contribution. Jets from the nozzles might break down into a fine spray and hit the rotor, slowing it down. Optimizing such a device is quite a challenging task, but this can, indeed, be done.

The hydraulic bowl and scroll drive system drives both the conveyor and bowl of a decanter centrifuge from hydraulic pump unit by two hydraulic oil circuits.

The advantage of the full hydraulic drive centrifuge is for use in high temperature ambient for heavy mud with flexible bowl and differential speed. The compact one skid design makes it easier for rig up.

DC Machinery have been developed for many which support many domestic and foreign customer to process and separate the waste water and other plant liquid treatment and got good feedback as well .

Decanters are horizontal, solids-oriented, solid-wall scroll centrifuges. They are primarily used for the clarification of suspensions and sludge with relatively high solids concentrations,but also for the separation of liquids with simultaneous removal of solids.

DCGLW250-980N Decanter Centrifuge 01

Application areas include below fields:

the cleaning of wash water and the treatment of fruit and vegetables in the food industry
the recovery of animal and plant oils and fats
the production of herbal medicines, copper extraction
chemical extraction in the paper industry
the treatment of waste oil for power generation
waste water treatment in sewage treatment plants
use on oil platforms for the extraction of crude oil and so on

decanter centrifuge

Features of DC Machinery

All parts coming into contact with the product are made of stainless steel.
3-phase AC motor for controlled torque starting via frequency converter
Approximately 80 to 90 % of the oil is recovered.
Low personnel costs due to continuous and automatic operation.
Highest g-force for higher solids output
Adjustable bowl speed via VFD
Automatic adjustment of differential speed via VFD
Two motor drive
Belts for both primary motor and secondary motor】

The Decanter centrifuge can be used for the pre-treatment for the algae biomass for the disk separator or tubular separator thus it effective higher the disk centrifuge or tubular separator capacity performance .

The decanter centrifuge is a horizontal centrifuge with continuous feeding and continuous discharging. The settling speed is determined by particle size, particle shape, difference in density between solids and liquids as well as their viscosity.

 

Drilling fluid centrifuge is the fourth stage equipments for a drilling mud system.D rilling mud cleaning first stage uses drilling fluids shale shaker ,then second stage uses desander,third desilter,(now drilling mud cleaner is widely used to replace desander,desilter). Centrifuge mainly separate particle sized 2-7microns.

Drilling rig centrifuges have got large development on both structure and functions. Especially there are many manufacturers design centrifuges according to drilling mud features or property. Then the centrifuge become many models and types used in various drilling projects.

drilling fluid centrifuge

Actually, in drilling rig solids control system centrifuge is the most complicated one. It is rather difficult for operator get leagal operation, etc. However, in long term its important position is following shale shaker subsequently

Decanter centrifuge are used to process unweighted and weighted, water-based and oil-based drilling fluids (muds). Mechanical energy is utilized to increase the gravitational force exerted on solids that are present in the mud system

The DCLW Series decanter scroll is the most flexible available on the market. Its specific open flight design reduces the torque created by the sludge and improves the clarification rate. The special cone design leads to a high sludge compaction.

Reduction of sludge conveying torque by 30% which impacts positively the gear box life time and the scroll drive size
High cake dryness due to better sludge compaction
Optimization of centrifuge power consumption due to High Hydraulic Pressure design
Excellent centrate quality due to improved and flow conditions
decanter centrifuge

Benefits of the DCLW Series decanter:

Up to 40% savings in energy costs
Low cost of ownership due to low power consumption features and high performance rotor
Easy and immediate change of process settings due to variable scroll and bowl speeds
Inline and fast dismantling design
Minimum footprint requirements due to in-line design
Optimum process performance due to adjustable pond depth and automatic control system
Lowest possible machine downtime due to easy, fast, and efficient service and maintenance efforts
High capacity and dryness
Ease of maintenance and low maintenance cost
Closed cooling system, no cross contamination

You are welcome to contact DC Machinery to get more detailed infos of DCLW Series decanter centrifuge, we will supply our best service for you.

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.

centrifuges

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.

Decanter centrifuge has become a major processing tool in a wide range of liquid/solid separation applications. The solid-bowl scroll-discharge centrifuge-now almost universally known as the decanter centrifuge-has, indeed, become the workhorse of a wide range of liquid/solid separation activities.

Its application to the dewatering of waste sludges has made it a most valuable tool in combating environmental pollution. This has made the decanter a well- known and widely appreciated piece of equipment.

decanter centrifguge

Although a complicated of machinery, the decanter centrifuge embodies a simple principle, that of the screw conveyor. In basic term, the decanter comprises a solid cylindrical bowl, rotating at high speed. Inside the bowl is a scroll( screw conveyor) rotating at a slightly different speed. The differential speed between bowl and scroll provides the conveying motion to collect and remove the solids, which accumulate at the bowl wall.

centrifuge

A slurry of liquid and suspended solids is fed along the centre line, to some fixed position within the bowl wall by the centrifugal force. This same force then cause the suspended solids to settle, and accumulate at the bowl wall. The clarified liquid then flows along the bowl, to leave at one end of it, over some kind of weir design, which sets the level of the liquid surface in the bowl.

The other end of the bowl is sloped inwards, towards the centre, thus providing a beach, up which the solids are conveyed, to be discharged from the bowl, at the top of the beach. Whilst the solids are conveyed up the beach,some, hopefully most, of the entrained liquid drains back into the pond, to join the liquid flow towards the
far end.

DC’s decanter centrifuges provide cost advantages in all kinds of organizations. The compact Swedish-made centrifuge takes up very little space and provides reliable and safe operation year after year.

Centrifuge drum

DCLW decanter centrifuge is available in several sizes and models to function in different kinds of organizations. Common applications include raw sludge, bio sludge, digested sludge, water treatment sludge, slaughterhouse sludge, paper/cellulose sludge, fish sludge and oil sludge. Each decanter centrifuge from DC can be adapted at several points to be customized to meet customer needs.

Decanter centrifuge

How to work of the centrifgue ? The drum and the spiral feeder rotate in the same direction but with a certain speed difference; the material is led into the feeding spiral inner cylinder via the feeding pipe and then the speeding pipe. After speeding up, the materail enters the drum, under the action of the centrifugal force field, the relatively heavier solid-phase material deposits on the drum wall, thus forming the residue layer; the solid-phase residue is continuously pushed by the spiral feeder to the conic end of the drum and, after dehydration in the drying area, is discharged out of the decanter centrifuge. The centrifuge is capable of continous feeding, separating, dehydrating and discharging under full-speed running.

 

Naturally, we also offer training, installation, commissioning, optimization and service once the machine has been delivered.

Deanter centrifuge is widely used in drilling fluid separation, it is the fourth separation in the whole solid control system which is located after of shaker, desander and desilter.

Mean while the frequency conversion centrifuge is more popularly used in drilling field, because of it with the alterable rotation speed to confim the different treating capacity. In order to meet some clients requirements, DC machinery decided to manufacture 2 sets VFD frequency conversion centrifuge, one is DCLW355 and the other is DCLW455. And the respective treating capacity is about 40m3/h and 60m3/h.

decanter centrifuge1

DCLW Decanter centrifuge Advantages:

1. Small start electrical current is safe to power supply system;
2. Width rotary speed to satisfy technical requirement;
3. Smooth and silence when start;
4. Save power more thirty percent than conventional centrifuge;
5. Quickly show system. The digital rotary speed of centrifuge can be controlled accurately and shown on LCD screen.
6. Operation of modulating speed is simple and various speed can be got;

SONY DSC

In order to thanks new and regular customer supporting, our company hold the sales promotion activities, and the 2 sets decanter centrifuge all have 5% sales. So if you have the requirements of decanter centrifuge, please feel free to contact us, you will be getting the matural technology supporting and lowest price.

 

DCLW series oilfield drilling fluids 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. The oilfield drilling mud decanter centrifuge can meet all different requirements of customers. It process the mud in various drilling conditions. After treatmented,the mud can achieves the ideal viscosity and proportion, results in better recycling,high efficiency,saving and environment protection.

SONY DSC

Decanter centrifuge separation principle

The separation is similar in principle to that achieved in a gravity separation process. The driving force is higher because is resulting from the rotation of the liquid: in the case of sedimentation, where the driving force is resulting from the difference in density between the solids particles and the liquid, the separation is achieved with a force from 1000 to 20000 times that of gravity.

Drilling Decanter Centrifuge Features:

1. Gravity sedimentation: the decanter can achieve separations that would be very difficult in a clarifier or lamella separator, and it produces drier solids.
2. Disk stack centrifuge: the decanter is truly continuous in operation, can handle much higher solids concentrations in the feed slurry and produces drier solids.
3. Innovative design includes longer bowl for increased retention time, resulting in drier solids and finer cut points.
4. German FAG or Sweden SKF brand bearings.
5. Imperforate basket centrifuges: the decanter operates continuously, can handle much higher solids concentrations, and produces much drier solids.
6. Stainless steel bowl, scroll, compartment and cover resist corrosion and provide long service life.

Centrifuge

The decanter centrifuge is the only sedimentation centrifuge designed from the start to handle significant solid concentration in the feed suspension.The decanter centrifuge is the only sedimentation centrifuge designed from the start to handle significant solid concentration in the feed suspension.The decanter centrifuge can be used for most types of liquid/solid separation. It can be used for the classification of solids in liquid suspension or for the clarification of liquids. It can also be used in the recovery of a valuable solid from its suspension in the liquid and it can wash the recovered solid from its mother liquor.