Category Archives: Centrifuge

Decanter centrifuge used for foreign project wastewater treatment system

Wastewater treatment plants for both municipal and industrial applications are designed to produce a clean, safe water discharge, usually to a river. Complexity of the plant depends on the immediate environmental considerations and consent limits negotiated with authorities. New plants built today are more and more sophisticated, making the decanter centrifuge ideal for precise wastewater treatment.


What wastewater industries can be used of decanter decanter

1. Sanitary Wastewater Treatment.
2. Food Plant Wastewater Treatment.
3. Snack Food Processors.
4. Industrial Wastewater Treatment.

Wastewater equipment from DC Machinery provides effective liquid-solid separation and solids dewatering technologies. DC Machinery wastewater systems are a means for treating wastewater by removing solids or waste oils. With the wastewater in a tank, dissolved air is released into the water. The air forms small bubbles, which
“grab” the solid or waste oil particles and float them to the top of the liquid. Solids are then scraped from the top of the basin. Decanter Centrifuges are effective pieces of equipment for dewatering solids skimmed off most wastewater systems.

decanter centrifuge

Centrifuges provide cost saving advantages:

1. 70% reduction of total disposal volume.
2. Produces stackable cake-like sludge.
3. Reduces handling costs.
4. Increases options for sludge disposal.

With the widest range of liquid-liquid and liquid-solid separation, solids dewatering, centrifuge liquid filtration and fluid clarification technologies, please contact DC Machinery.

Welcome your inquiry DC Decanter centrifuges

Sludge dewatering is the separation of a liquid and solid phase whereby, generally, the least possible residual moisture is required in the solid phase and the lowest possible solid particle residues are required in the separated liquid phase (“the centrate”).

DC Machinery can provide the most professional decanter centrifuge used for slurry treatment. The centrifuge consists of a solid bowl, which rotates and contains the process. A screw conveyor, contained within the bowl, turns at a slightly different speed from the bowl.



DC Machinery Decanter Centrifuge units are supplied with advanced controls for both variable speed bowl and scroll back-drive optimization making them easily configured to produce a wide range of sludge dewatering results. The DC Machinwey is very easy to set up while being extremely robust, stable, and reliable in everyday use, without the ease of use detracting from the quality of the operating results.



Besides Above, DC Decanter Centrifuge is designed for the drilling mud solids control and oilfield waste management. DC VFD drive decanter centrifuge with variable speed allows drilling contracor or mud service company to do the barite recovery, fine/ ultra fine solids separation,dewatering centrifuge. DC have the decanter
centrifuge from 9 inch bowl to 22 inch bowl available for different applications. DC decanter centrifuge bowl length and diameter ration is over 3, this gives the best result for the drilling fluids cleaning.

Use advantages of the drilling fluid centrifuges for solid control system

One of the most effective ways of solids control is with an oilfield decanter centrifuge. With a horizontal oilfield decanter centrifuge, the mixture of drilling liquid and cuttings and solids enter into the centrifuge. When it enters the centrifuge, it gets spun at an extremely high rate, sometimes as much as 3000 times the force of gravity. When this happens, the solids will separate from the liquids. When they are separated, the drilling liquid can be decanted and eventually returned to the mud tank where it can be replaced into the borehole for efficient drilling.



One of the biggest advantages to having an oilfield decanter centrifuge is the size that it takes up. Compared to other solids control equipment, a centrifuge takes up less real estate. On many oilfields the site footprint is not large enough to support a wide range of solids control equipment. A centrifuge is highly effective and efficient so you can separate solids from drilling liquids even on small drilling sites.



The 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.oilfield Decanting Centrifuge are able to apply over 3,000 G-forces on the liquid/solids mixture, which separates the heavier solids from the lighter solids. Additionally, high G-forces separate fine solids from liquid.

Our factory and company are Quality Management System ISO 9001-2000 certified. DC Solids Control operate international oil gas drilling mud separation system. Ruggedly built for oilfield and industrial Solids control service, decanting centrifuge is especially effective in meeting fluid-on-cuttings discharge requirements in environmentally sensitive areas. decanting centrifuge also deliver high fluid recovery rates and efficient solids control to significantly reduce the operator’s total mud cost and limit waste disposal volumes.

Drilling fluid centrifuges Made from DC Solid control

Centrifuges are another essential part of any effective solids control system. They have a great advantage of achieving extremely fine cut points. The rotating speed is transformed into centrifugal force inside the rotating assembly to accelerate particle settling. Essentially, a centrifuge acts as a small settling pit which alloys rapid settling of solids under controlled conditions.

drilling fluid centrifuge

In order to achieve effective solids control there are several steps that should be taken. The first and most critical step is to obtain an effective, dependable and durable solids control system. Special attention should be given to ensure that the system is hydraulically balanced, capable of making both a scalp cut and a fine cut, and that the system has sufficient drilling fluid mixing and re-circulating capacity.

Decanting centrifuge key part is screw conveyor and transmission. When centrifuge work, drilling fluid will flow into centrifuge through drilling fluid input. Then the roll bowl will increase speed and fluid will flow into centrifuge through one fixed input pipe. Since rolling bowl rotate at rather high speed.

Drilling mud decanter centrifuge are designed specifically to remove unwanted solids and fine particles from virtually all kinds of used drilling mud, including those based on water/synthetics and conventional oil-based drilling fluids. Please contact DC Solid control to get more information about the drilling fluid centrifuges.

The function of the Decanter centrifuge in dewatering system

Whole waste water treatment includes sludge feeding system, flocculant adding system, dewatering system,filter cake delivery system and PLC control system. The main equipment of sludge dewatering complete system is decanter centrifuge.There are basically two application types in the wastewater treatment industry for the decanter
centrifuge: sludge thickening and sludge dewatering duties.

decanter centrifuge

Also .it can be used for Sludge classification and Sludge clarification. With the decanter centrifuge,it is possible to separate the particles from suspending liquid with equivalent diameter bigger than 0.003mm,solid-liquid weight ratio less than 10% or volume ratio less than 70%,difference in specific gravity bigger than 0.05g/cm3.

Sludge dewatering complete system could be used in the following fields:

Municipal sludge treatment, paper mill sludge,starch factory waste water treatment, stell mill sludge,printing and dyeing mill sludge,water works sludge,pharmaceutical waste sludge,PVC sludge,sewage desulfurization sludge,grain stillage, power plant ash sludge,dairy sludge,beer sludge,drilling fluid ,electroplating liquid,fermented  liquid manure,oil refining sludge,soap sludge,leather sludge and etc.

DC Machinery can provide all kinds model of decanter centrifuge used in different files. So if want to buy centrifuges now please contact our office there you will be getting the most professional guidance and reasonable price.

DCLW decanter centrifuge used for sludge dewatering in wastewater treatment plants.

Centrifuges are designed to separate solids from sludge mixtures with continuous and space-saving dewatering systems combined with high efficiency. A major application is the sludge dewatering in wastewater treatment plants.

The revolving parts of the centrifuge, is the drum and scroll, are driven by electric motors that are controlled by two inverter and managed by means of software, running on a PLC.

DCGLW250-980N Decanter Centrifuge 01

Understanding decanter centrifuge operation helps manage drying energy costs Consecutive mechanical dewatering and thermal drying are integral parts of sludge management, lowering the sludge volume that needs to be disposed of or further treated.

decanter centrifuge

DCLW series Industry Decanter centrifuge is widely used in wastewater treatment, crude oil recovery, coal tar recovery, palm oil recovery, fruit juice production, protein production, DC production, starch production, food waste treatment, etc. with VFD, and PLC Control, can choose 2/3 phase separation.

Centrifuge Drum and spiral parts titanium welding with 304/316 / 316L/321 stainless steel, stale performance and long service, warmly welcomed by the customers at home and abroad

3 sets DCLW450-1000 decanter centrifuge shipped to Russian clients

Drilling mud centrifuge is a very important in solid control system. Usually it is the forth phase solid separation equipment. DC Solid control shipped 3 sets DCLW450-1000 decanter centrifuge to a repeat client from Russian.

Decanting centrifuge separate the suspending fluids using the principle of centrifugal action, the suspending fluids is pushed into the rotor drum through the inlet pipe and the fluid hole of the spiral feeder. Under the influence of centrifugal force, solid phase particles are pushed to the internal wall of the drum, then to the mud export of the small end of the drum and excreted.


The DCLW450-1000 model decanter centrifuge is a very popular for oil and gas drilling fields. The reason why it is popular its lower price and best treating efficiency. The drum diameter and length of the centrifuge is 450mm and 1000mm. Max treating capacity is 45m3/h. Although it is the fixed frequency centrifuge, but its working effect is good, so is warmly received by users.

decanter centrifuges

If you are looking for an oilfield decanter centrifuge that is highly effective and affordable, please browse our products. We offer a range of centrifuges of different sizes and capabilities that give you the exact results you need at a price that you can afford.

DCLW drilling mud decanter centrifuge introduction

Drilling fluid centrifuge is the third phase equipment in mud circulation system. DC solids control produce 3 models of high speed,middle speed, variable speed 2 phase centrifuges that separate solids from liquids. In all three models, the operating principle is theoretically the same.


DCLW serial centrifuge has two control models of variable frequency and work frequency, and has abovementioned various centrifuges devoted for ocean drilling platforms. The work frequency-driven centrifuge can change its speed through pulley and belt change, and the variable frequency centrifuge can realize infinite speed variation in a large scope and its control cabinet can directly display the parameters of work rev., work current and torque. The engine may be suitable for power grids of 50Hz and 60Hz.

decanter centrifuge

Compared to other solids control equipment, a centrifuge takes up less real estate. On many oilfields the site footprint is not large enough to support a wide range of solids control equipment. A centrifuge is highly effective and efficient so you can separate solids from drilling liquids even on small drilling sites.

If you are looking for an oilfield decanter centrifuge that is highly effective and affordable, please browse our products. We offer a range of centrifuges of different sizes and capabilities that give you the exact results you need at a price that you can afford.

What should we know about the Decanter centrifuge

A decanter centrifuge separates solids from liquid phase(s) with high efficiency. In the centrifuge the gravitational acceleration is replaced by the much higher centrifugal acceleration (up to 4000 x g). By this high bowl speed the solids (higher density) are separated from liquids (lower density).

Decanter means that the liquid and the solid phase are separated from each other by centrifugal acceleration. The solids particles collect due to their higher density on the bowl wall and are transported with the scroll to the discharge openings. At the same time the cleared liquid flows along the scroll into the liquid discharge zone.

decanter centrifuge

The four main sections of a decanter centrifuges:

1) Inlet zone
The inlet zone accelerates the feed slurry up to the speed of the bowl. A properly engineered inlet zone keeps any degradation of the feed solids to a minimum as well as avoiding disturbance of the sediment in the bowl. A number of feed zone specifications are available for decanter centrifuges, each designed to ensure maximum performance in conjunction with a specific process.

2) Screw conveyor
The key to good decanter performance lies in the efficient, effective scrolling of the sedimented solids. The design of the screw conveyor is therefore crucial. You must have the expertise needed to match the demands involved in specific industrial processes with specific configurations of flight pitch, lead angle and differential speed, in order to secure the best possible results.

3) Solids Discharge Section
Depending on the application, the consistency of the separated solids can vary from a dry powder to a paste. The configuration of the discharge zone is therefore chosen to enable such “cakes” to exit as effectively as possible. Innovative designs enables erosion-prone components used in the solids discharge zone to be replaced on site at low cost and with a minimum of disturbance to production.

4) Liquid Discharge Section
In a two-phase decanter, the liquid level is regulated by dam plates. In a three-phase centrifuge when operating in a three-phase mode, each phase discharges over a set of dam plates into separate baffled compartments in the casing. In certain applications, a centripetal pump discharge that utilizes the pressure head developed by the rotating liquid phase is used to pump the liquid from the decanter.

Typical applications of 2-phase separation are waste water clearing, sludge dewatering, but also juice and wine production with decanter centrifuges.

High speed centrifuges in in actual application

A problem for everyone who uses decanter centrifuges in the oil field is judging the centrifuge’s capacity, particularly in unweighted mud. Unfortunately the general attitude of the industry is to give hydraulic capacity (how much feed a centrifuge can physically swallow) without regard to the quality of performance a centrifuge can give at
its “rated capacity”.

decanter centrifuge

Another questions is the drum speed, why divided into lower speed, middle speed and high speed centrifuges. We should choose the right and reasonable centrifuges models according to the different industries.



High speed centrifuge has costs, not to the driller, but to the centrifuge owner. Suppose the centrifuge is one pound out of balance. If the centrifuge rotates at 900 RPM, the unbalanced load is 276 lbs, and this unbalanced load is carried by the bearings through to the frame. If it sped up too 1800 RPM, the unbalance load goes up to 1,104
lbs. To keep the centrifuge from shaking itself to death or an early bearing failure, higher speeds require better mechanical tolerances. Generally, to maintain these tolerances over a service life of many years, the centrifuge should be made from stainless steel.

Please contact DC Machinery to get more information about the decanter centrifuges.