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Category Archives: decanter centrifuge

A decanter centrifuge from DC Machinery are painting now

The decanter centrifuge ordered by my Russian client are painting now this morning. It is used for oil drilling site to process the drilling fluid and located after the desilter.

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.

IMG_1270

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..

So DCLW centrifuges have adopted new technology on conveyor. Such as mount carbon tungsten alloy plates by welding and bolts. This increase centrifuge conveyer usable life and whole equipment duration.

You are welcome to contact Tangshan Dachuan Machinery to get more detailed infos of different type centrifuges, we will supply our best service for you.

Typical areas of use of decanter centrifuges

The decanter centrifuge produced by DC Machinery are horizontally positioned centrifuges with a solid wall drum (therefore also called solid wall screw centrifuges). The drum is cylindrical-conical, it consists of a longer cylindrical part (the so-called clarifying zone) and of a conical part (the so-called dry zone). The material to be processed is fed via a so-called feed tube into the drum, where, due to the centrifugal force the solid material particles sediment on the drum wall.

Decanters (decanter centrifuges) are “solid material oriented” centrifuges which can process liquids / suspensions with high solid material contents (up to ca. 60% by volume).

centrifgues
Typical areas of use are:

Clarification of liquids and suspensions
Thickening of sludges
Dehydration of sludges and suspensions
Washing
Classification (wet classification of solid materials in a suspension according to grain size)
Extraction
Separation of 3-phase mixtures (two fluid phases, insoluble in each other, and a solid material phase) etc.

Decanter centrifuge used for sewage treatment shipped to Korea

Decanter centrifuge is an universal equipment used in  sewage treatment industry. Today, DC Machinery are delivering a set of  frequency conversion centrifuge to Korea.

DCLW Series Decanter Centrifuge range provides an effective, low-maintenance solution to continuous liquid clarifying and / or solids dewatering with advanced process and mechanical performance features. Besides DCLW Series Decanter centrifuges are versatile and capable of adapting to varying throughput and process and material types. The machines are easy to adjust, require little operator attention, are relatively quiet and feature a small footprint.

centrifuge

In order to fully understand how a decanter centrifuge operates, we must first define what a centrifuge does. In many industrial jobs, solid material often mixes with liquids, contaminating water supplies or turning mud into sludge. A decanter centrifuge is useful in that it separates solids and liquids, and has become an essential component of water waste facilities and the chemical, oil, and food processing industries. Moreover, without a centrifuge, many of these companies would become so inefficient they could not function.

decanters

DC Machinery  offers horizontal continuous cleaning model decanter centrifuges available in a range of capacity sizes in addition to specialized decanter centrifuges. If you have requst of any industry and capacity, please contact us.

Professional wastewater process DCLW350-1200 decanter centrifuge for sale

Decanter centrifuge is an very popularized equipment to separate solid from fluid. Which is widely used in wasterwater process, drilling fluid circulating, food and coalbed methane and ect. industries.

DCLW horizontal spiral decanter centrifuge is a professional equipment for wastewate processed. DCLW decanter centrifuges are divided into frequency conversion and constant operating frequency types.

centrifuges

Following is a model of waterwater process decanter parameters:

Model: DCLW350-1200.
Drum diameter: 350mm
Drum Length: 1200mm
Treating capacity:1-8m3
Max Speed: 3900rpm (frequency conversion)
Separation factor: 2400G

decanters

Features of DCLW Series decanter centrifuges:

1. DC Machinery centrifuges can operate at full speed to finish feeding , centrifugal sedimentation discharge and other procedures , high degree of automation.
2. 8000 hours bearing guarantee period and 5 years control pannel guarantee period.
3. 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
4. Simplified solid control system, low energy consumption , lighter working load, and the purification efficiency increased by 30% than original.

You are welcome to contact Tangshan Dachuan Machinery to get more detailed infos, we will supply our best service for you.

Three sets constant-frequency decanter centrifuge for ARAMCO

Usually decanter centrifuge is the third stage separation equipment of drilling fluid circulating system, it can separate out the solid particles whose diameter is 5-7um. Decanter centrifuges are an essential part gradually of cost drilling fluid processing.

Nowdays, DC solid control shipped three sets constant-frequency centrifuge for ARACO. I am glad that the company was introduced by my another Saudi clients. Finally we build our first business cooperation because of this relationship.

centrifuge

Features of the orders’ centrifuge:

1. The three sets centrifuge with bowl diameter larger than 450mm is always called as big bowl. Comparing with the small bowl centrifuge of 842 inch, the big bowl has larger capacity.
2. The protection of the screw propeller is tungsten carbide tiles to enhance the anti-wear features. Long lifetime saves the cost for repairing and maintenance.
3. DC Solid control’s centrifuge, no matter big bowl or small bowl, is driven by 2 motors. This 450mm big bowl is driven by a 30kw main motor and a 7.5kw back motor. Via the planetary gearbox, the back motor could drive the screw propeller to rotate same direction as the bowl but different speed, so that the solids could be pushed out from the inside the bowl.

decanter centrifuge

In addition to producing the constant and variable frequency 2 phase decanter centrifuge. DC Solid control aslo manufacture the three phase decanter centrifuges to separate the oil,water and cuttings from drilling fluid. If you have requirements of any of them, please don’t hesitate to contact us.

 

Decanter centrifuge preparing delivery to Indonesia

Decanter centrifuge is a special separation equipment for drilling fluid circulating system, waste management, textile waste processing and ect.

Recent days, there is a decanter centrifuge preparing delivery to Indonesia which used for textile industry. The bowl cylindrical and conical section made from duplex stainless steel 2205 by centrifugal casting. Other parts of the bowl assembly material is stainless steel SS316. And the screw flow distrubution port and bowl solids discharge port protected by tungsten carbide alloy. Pressurized EX proof VFD control cabinet with PLC controlled.

centrifuges

The corrosion resistance and abrasive resistance of duplex stainless steel is better than the common SS304, which have already received by the masses of users gradually and will replacing SS304 drum decanter centrifuges.

decanter centrifuge

The main working part of centrifuge is the drum whose length and diameter directly decide the centrifuge treating capacity. DC Solid contrl provide different radial centrifuges. We have fixed and frequency conversion the two kinds of centrifuges. Any questions about decanter centrifuges, please contact us.

Important parameter of decanter centrifuges

Centrifuge is the last stage separation equipment in the drilling mud cleaning system, it is most often used for clarification of
liquid containing high concentrations of solids, removing solids from liquid.

centrifuges (1)

There are many type and models centrifuge used in oil and gas field, the most important factor of the decanter centrifuge treating
capacity is the drum diameter and length. It is the main parameters to affect centrifuge capacity. Normally speaking, the bigger of
the bowl size, the bigger of centrifuge max, capacity (hydraulic test). But it is not meant big bowl centrifuge is the best choice
for bigger capacity. Customer should consider the material condition, the result they want to get after separation to choose the
suitable model. For different mud condition, specially for drilling waste management, different centrifuge model suits.

centrifuges (2)

Besides, with different design, lengths and cone geometries, decanter centrifuge from DC Solid control can be applied in any
processing environment that requires a separation step between solids and liquids.  DC Solid control’s decanter centrifuges provide
meticulous control, low cost and high reliability.

Meanwhile in a range of sizes, decanter centrifuges provide an effective, low maintenance solution to liquid clarifying and solids
dewatering with advanced process and mechanical performance features. All models and systems built at DC Solid control system can be
modified into a turn-key operation.

 

 

Working steps of decanter centrifuges

In order to fully understand how a decanter centrifuge operates, we must first define what a centrifuge does. In many industrial jobs, solid material often mixes with liquids, contaminating water supplies or turning mud into sludge. A decanter centrifuge is useful in that it separates solids and liquids, and has become an essential component of water waste facilities and the chemical, oil, and food processing industries. Moreover, without a centrifuge, many of these companies would become so inefficient they could not function.

centrifuges

There are several types of decanter centrifuges currently utilized in the industry, the most common of which are vertical, horizontal and conveyor centrifuges. The principle behind a decanter centrifuge is based on the theory of gravitational separation.

decanter centrifuge

Working steps of decanter centrifuge

Step 1: The slurry is inserted into the centrifuge through a connecting pipe and onto a conveyor.
Step 2: Utilizing an internal feed compartment, the conveyor ushers the slurry through a nozzle into the bowl area.
Step 3: The bowl rotates at high speeds to induce gravitational forces.
Step 4: High speed rotation separates the solid material from the liquid in a matter of seconds.
Step 5: The conveyor delivers the solid material upwards where it is discharged through a nozzle.
Step 6: The solid material removed, the purified liquid is released from a separate output.

The ability to purify a liquid makes decanter centrifuges ideal for waste water treatment facilities. However, there are variety of industries for which such centrifuges play an important role. Similar to other decanter equipment, centrifuges are simple to install and do not require a foundation to build upon.

 

The main component of centrifuge

Drilling fluid decanting centrifuge used for recovery barite to remove small solid particles, reduce the mud solid content, to ensure the performance of the drilling fluid. The drilling fluid decanting centrifuge is driven by two motors. The drum and spiral rotate together in the same direction, but at different speeds . Separate the solid phases in the drilling mud by the centrifugal sedimentation principle. Now let’s discuss the main component of the centrifuges.

Drum

Drum- scroll

The scroll is located within the drum and is mounted bu a collar fitting to the main horizontal shaft of the former. They both turn in the same direction but at slightly different speeds, so that the solid product is drawn along axially, sedimenting and completing its formation as it moves; at the end of its movement it accumulates in the truncated cone where it is drained of liquid and expelled from the machine.

centrifuge

Transmission

Transmission from the motor to the drum is effected by a hydrodynamic coupling and belt drive.
The internal scroll is driven by a belt drive from the drum, using epicyclic train reduction gearing.
The individual parts in the transmission are specially produced to obtain the optimum processing relationship between drum and scroll speeds.
A mechanical device is located in the drum-augur transmission chain, representing its weakest point, and protecting the reduction gearing, and other moving parts, from any excessive strain that might occur in the drum coupling during processing.

 

 

Features of DCLW600-1500 decanter centrifuge

DC’s high speed, high performance decanter centrifuges are ruggedly built for industrial service and are especially effective in environmentally sensitive areas. With their robust construction and corrosion-resistant materials, DC centrifuges provide long service lives and have low maintenance costs even in the toughest environments.

drum

DC’s 600-1500 high speed, decanter centrifuges deliver high recovery rates and efficient solids separation to significantly reduce disposal costs or reclaim valuable material from process streams. The 600-1500 centrifuges are precision-balanced for smooth operation over long periods at high RPM speeds, generating extremely high G- forces.

decanter centrifuge

Features of these centrifuges include rugged construction and corrosion-resistant materials; three-port feed tube; back drive speed adjustable from -18 to +85 RPMs; and tungsten carbide scroll points.

The 600-1500 decanter Centrifuges boast infinite speed adjustability of main bowl drive and backdrive (differential). Utilizing variable frequency drives on all motors allows low amperage start-ups and eliminates troublesome sheave changes. Stainless steel wetted parts, tungsten carbide hard facing on bowl and scroll, as well as superior gearbox construction make it durable and rugged.

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