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Tag Archives: decanter centrifuge

Business trip to Pakistan for a decanter centrifuge

To be as a leadder supplier of decanter centrifuge in China. We solid hundreds decanter centrifuge to all over the world per year. This time, our decanter centrifuge engineer got to Karachi to free adjust teh centrifuge, meanwhile, train the using workers.

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.

decanter

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.

centrifuge

DC Machinery also design and manufacture many types decanter centrifuge used for many industries. If you have special request, please contact me.

3-Phase centrifuge produced by DC Machinery

DC Machinery is a profession manufacturer of design and produce two and three phase centrifuges. The DCLW series is a screw decanter centrifuge with a special specification. It enables three-phase separation of Oil, Water and Solid matter based on previous two-phase separation using the difference in specific gravity between solid and liquid.

centrifuge

Three-phase centrifuge separation by unique structure:

Separation of light and heavy liquid has been made possible by adopting the special structure of a liquid outlet dam. We also have various options available, and have good advancements for palm oil manufacturers with our high-G and anti-wear specification machines.

Working Principle:

Using two different size dams for liquid outlets, light liquid and heavy liquid separated using the centrifugal effect can be discharged separately.

centrifuge

Specifications:

1. Disposal volume is in the case of press water for fish meal, and can be altered according to the liquid disposed.
2. Motor Output can be altered according to the adopted centrifugal effect. *= On the condition of no common bed

You are welcome to contact DC Machinery to get more detailed info, we will supply our best service for you.

Low and high speed decanter centrifuges China supplier

Drilling fluid centrifuge is one of the important equipment in solid control equipment, in general condition it is installed in the last stage in the system.

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.

centrifuge

Besides, centrifuge is a ideal equipment to dispose abandon drilling and preventing pollution environment. Centrifuge is widely used in mining industry, steel, agriculture and light industry.

DC Machinery is a professional manufacture of decanter centrifuge, we have low speed and high speed centrifuges:

Low speed centrifuge

The main function of low speed centrifuge in solid control system is throwing the barites and aggravating solid phase particles out of drilling fluid and recycling utilization to control drilling fluids density. The economic benefit to dilute drilling fluid to control drilling fluid density is very obvious.

centrifuges

High speed centrifuge 

The high speed throughput is smaller 5 times than medium speed centrifuge, and it can dispose the fine solid phase particles, it can’t separate high solid phase density drilling fluid. So it must used matching with low speed centrifuge. But the solid phase processing range of high speed centrifuge is influencing the solid phase range of drilling fluid viscosity. So high speed centrifuge has the good effect to decrease drilling fluid shearing force in deep well, improve well quality and prevent down well accident.

If you have any requirements any models of decanter centrifuge, please contact us, you will get the most professional technical guidence and complete before sale and after sale service.

Why more users choose DC centrifuge for wastewater treatment

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. Such as, printing, light industry, chemical industry, chemical fiber, leather making, mining, pharmaceutical, brewing, food, coal dust, electroplating. Our company combines the decanters structure of Sweden, Germany, Japan and users request to adopt advanced manufacturing technique to get the domestic advanced level.

structure of decanter

Main feature of the decanters centrifuge compared with others:

1 Separation factor is high: Max 4000.

2.Ration of length and diameter is big: Max 4.2.
3. low energy consumption: 1/3~1/2 of the same product.
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.
5. Low noise: less than 85Db(A).
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.
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.
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.

decanters

DC decanters 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.

3-Phase horizontal centrifuge China supplier

The 3-Phase Separating Decanter is a centrifuge in which two liquids of different densities are separated from each other. At the same time solids are separated and discharged. 3-Phase centrifuges are widely used in oilfield at present.

A three-phase centrifuge is capable of three distinct phase separations in a single pass. Three-phase centrifuges are uncommon in the petroleum industry, but have been used in other industries. The oil field separation is a far more difficult problem, because the oil field mixture is a solid-stabilized emulsion produced from a liquid-solid. This 3-phase separation horizontal decanter centrifuge is primarilly employed for solid-liquid-liquid separation, namely the simultaneous separation of one solid phase and two immiscible liquid phases with different densities. The premise is that the solid phase is the heaviest.

3-phase centrifuge

Separation process of 3-phase centrifuges 

The feedstock enters the decanter through feed tube and flows into the centrifugation space through the distributor. The conveyor screw transports the solids to the solids discharge. The level of the liquid can be adjusted by fitting regulating rings or disks of the required inner diameter. Separation of the two liquid phases takes place in the separation zone, whereby the light phase flows towards the bowl axis, and the heavy phase towards the bowl wall.

Working principle

Under the centrifugal force, the material will be formed with three relatively stable layers including solid phase layer, as well as heavy and light liquid layers, from the bowl wall to the inside. The solid phase will be driven to the small end of the rotary bowl by the screw conveyor and then will be expelled from the slagging hole. The heavy and light liquid phases will flow towards the big end of the rotating bowl along passages among screw flights and then will be drained from different outlets. Therefore, the continous 3-phase separation achieved.

DC Machinery is a specialized 3-phase separation horizontal decanter centrifuge manufacturer and supplier in China. We offer a vast range of products, including high speed centrifuge, 2-phase separation horizontal decanter centrifuge. If you have any requirements, please contact us.

Characteristic introction of decanter centrifuge

The word “ decanting means pouring of liquid so slowly that any sediment in the bottom remains undisturbed.
The centrifugal force created by the centrifuge depends on the diameter and Rpm of the bowl. Use the following formula to calculate
“ G” force:  G=(RPM)2 (0.0000142) (Diameter of bowl, in ).

The performance of decanter centrifuge for a given mud depends on the following factors:
1. The G’ exerted on the fluid.
2. The retention time of the fluid in the centrifuge.
3. Conveyor speed.

decanter

The following factors are considered in different designs and applications:

1. Bowl diameter
2. Length of bowl (increases retention time )
3. RPM operating range
4. Conveyor speed
5. pool depth

The rate at witch a particle will settle is directly proportional to the force of gravity , the square of its diameter and the difference in density between liquid and the medium in which it is settling. It is also indirectly proportional to the viscosity of the liquid.

In weighted mud, the application of centrifuges is some what different. In general, two centrifuges are used. One unit is used to remove the weight materials and the second one is used to remove drilled solids. The clean mud is then returned to the achieved system where it is re- united with the recovered weight materials.

 

Why choose DCLW Series decanter centrifuge

Decanter centrifuges are normally based on horizontal separation technology and work at slower speeds. DCLW series decanter centrifuges are specially designed for the drilling mud solids control. The effective centrifuging and fine drilled solids separation can remove significant quantities of inseparatable solids. This significantly reduces the traditional dilution requirements and drilling waste volume for disposal.

centrifuges

DCLW Series centrifuges have the flexibility to adapt to almost any solids separation application and are ideal for environmentally sensitive areas and have the flexibility to adapt to almost any solids separation application and are ideal for high volume dewatering applications.

decanter centrifuge

Design features of DCLW Decanter centrifuge
1. Two- three-phase design
2. Conveyor and bowl in various stainless steels: AISI 414, AISI 304
3. Wear protection (interchangeable) of conveyor diffuser
4. Wear protection of conveyor flights in tungsten carbide
5. Automatic differential speed variation:- via Roto variator system

DCLW decanter centrifuge employs the same principles of gravitational force. However, unlike the glass mixture, the process is expedited through the use of continuous rotation. In fact, rotation provides anywhere from 1000 to 4000 times the normal gravitational force, reducing the time required for separation from hours to seconds.

DC Solid control offers horizontal continuous cleaning model decanter centrifuges available in a range of capacity sizes in addition to specialized decanter centrifuges.

DCLW Decanter centrifuge for sell

DCLW Decanter Centrifuge range provides an effective, low-maintenance solution to continuous liquid clarifying and / or solids dewatering with advanced process and mechanical performance features.

DCGLW250-980N Decanter Centrifuge 02

Decanter centrifuge designs:

Decanter centrifuge for clarifying liquids.
Dewatering decanter for maximum concentration of solids.
Concentrating decanter for the concentration of solids.
Separating decanter for the separation of liquid mixtures and the simultaneous separation of solids.
Classifying decanters for the extraction of different solid fractions.
Extraction decanters for the extraction of reusable materials.

centrifuge

The main features of the decanter centrifuge are:

User friendly advanced control technology.
Screen and Solid bowl configurations.
Bowls range from 150mm – 1400mm Diameter.
Sealed and pressure-tight construction.
Two and three phase versions.
Compliant with environmental noise regulations.
Low operating costs, low maintenance costs.
Low cake moisture – high solids removal – high centrate clarity.
For slurries 1-70% solids: particles 1 micron to > 1cm
Solids output from 0.1 – 100T/hr dry solids.
Centrate output from 40 litres per minute to 5,000 litres per minute.
Compact – small “footprint”.
Materials of construction to suit the rigours of the application.
State of the art abrasion resistant materials.

You are welcome to contact Tangshan Dachuan Machinery to get more detailed infos, we will supply our best service for you.
Note:DCGLW centrifuge can be made with power frequency or frequency conversion according to the requirement of the customers.

Why use solid control system in oil&gas drilling

Drilling mud is a obbligato part in petroleum drilling. It has highly polluting properties. As followings;\

Drilling muds contain a wide range of substances including base fluids (eg mineral oils/calcium chloride), weighting agents (eg barite), viscosifers (eg bentonite), surfactants (eg imidazolines) and biocides (eg glutaraldehyde).

 

Mud can aDrilling mudlso contain contaminants from formations (eg oil, condensate and H2S).

Hot mud will generate mists and vapours.

Health effects include dermatitis, respiratory irritation, narcosis and cancer.

H2S is a very toxic gas, it can irritate the eyes, and throat and can cause unconsciousness and death.

Good practice benchmark values for total oil vapour is 50 mg/m3 and oil mist is 1 mg/m3.

Individual substances should comply with their workplace exposure.

solid control system

Following the development of social economy, Each country is very strict to the environment but can’t restrict the development of economy. So appear solid control system to separate it. Solid control is a professional application to treat and recover the drilling mud.

Solid control system mainly consist of 5 levels( shale shaker, desander, desilter and decanter centrifuge). It not only can remove the harmful solid phase, but also can recycle the useful mud. That meas, protection the environment and reduce the drilling cost. Solid control system also become the obbligato part in petroleum drilling.

Inputs and outputs of centrifuge

Centrifuge has often been considered as a black box, as the solid mechanics and fluid dynamics are quite complex. Here we will discuss the scientific basis and understanding of centrifugation and operation of various types of available centrifuges as commonly used in separation in biotechnology.

Bowl

In the simplest terms, for a centrifuge processing a wet feed suspension after centrifuging, a centrate, supernatant, or overflow containing a small a mount of suspended solids leave the centrifuge together with a moist concentrate, wet cake, or underflow. There could be also another input such as chemicals( coagulants and flocculants ) added to flocculate the feed suspension.

Decanter centrifuge

Based on the precipitants contauning protein, or in the centrate liquid phase, as in the extracellular protein expression.

The centrifgue needs to be tuned to separate the product from the rest( waste or recycle stream). Depending on the specific process, some metrics or measures are commonly used to assess the centrifugal separation.

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