Now building on this definition, we can imagine the vast application of such equipment in a variety of industrial scenarios, where different materials need to be separated. Let us pick oilfield drilling industry for an instance, where large volume of drilling waste is produced by the drilling process.
Not only the waste is harmful to the environment, if disposed directly without treatment, but it also contains large quantity of drilling fluid that needs to be extracted and restored. To accomplish this challenging task of separating the fluid, decanter centrifuges are deployed in drilling operations.
The working of a centrifuge could be understood as – If laid down in plain words – it uses the express rotation to separate different types of materials. In a more technical expression, a centrifuge is the equipment that uses the centrifugal force to separate substance based on their density using the principle of sedimentation.
Imagine a jar full of milk cream, when churned at good speed, it separates the cream into butter and skimmed milk. We know that different materials have different density, and the centrifugal force makes them move against the axis of the pit in which they are stored with the help of rapid rotations using mechanical force. Naturally the material with lowest density will make it way upward and the one with highest density will get settled at the bottom of the pit.
The decanter centrifuge equipment is used in a variety of machines that need to filter the mixture of solids and fluids. It finds it application in number of industries ranging from food processing industry to oil and natural gas industry.
The use of centrifugal principle for solid-liquid separation equipment, drilling fluid solid-phase control system is the last level of equipment.
For non-aggravating drilling cnetrifuge is mainly used to remove the fine and harmful solid phase, the increase in drilling fluid is mainly used to remove excess colloid, control drilling fluid viscosity. It is also an effective equipment for handling drilling waste drilling fluids and preventing environmental pollution.
The electric motor drives the drum rotatably supported at both ends of the rolling bearing, and the drum drives the screw conveyor through the planetary differential and maintains a certain speed difference between the drum and the screw conveyor.
When the drilling fluid containing the solid particles is continuously fed into the machine from the feed pipe, the drilling fluid is accelerated in the screw shaft of the screw conveyor and flows from the inlet hole on the hollow shaft into the high speed rotating drum.
Optimized spiral structure for different applications Through a large number of application results obtained from the experience Material can be made of stainless steel, Hastelloy, titanium or nickel Optimized wear protection for rough materials Rugged design to meet harsh working conditions Can be used for airtight and pressure operation Heavy duty differential with a maximum torque of 120,000 Nm OEM services are available worldwide
Decanter Centrifuge force, the drilling fluid in the drum to form a liquid ring layer, and the solid-liquid separation, coarse and heavier solid particles were thrown to the drum wall to form sediment layer, drum and conveyor .
There is a difference between the speed difference, sediment Was pushed by the conveyor to the small end of the drum, discharged from the slag discharge. The separated drilling fluid is discharged from the overflow port at the big end of the drum.
The main part of the drilling waste management system is the sedimentation centrifuge. Decanter Centrifuge is usually used for drilling waste treatment , mud and sludge and oil separation, etc.
There are some ways to maximize the performance of settling centrifuge:
• Operates with high G vibrating screens for water-based drilling waste or chips. After treating the waste with a vibrating screen, the material is fed into a settling centrifuge to separate small solid matter.
• Vertical cutting dryers are widely used in almost every borehole area. The use of decanter centrifuges and vertical dryer will help to deal with oil and synthetic drilling waste. The chips are first treated in a slurry shaker and then treated in a vertical dryer and then into a settling centrifuge.
• It is also important to choose the correct type of settling centrifuge. The details of the equipment must be discussed with the supplier and the manufacturer. Operators can understand the performance and efficiency by looking at machine data under similar conditions.
• The decanter centrifuge you choose must be based on your design. Some applications require high speed, while other applications require large bowl separation. Before purchasing the machine, please remember to summarize the clear picture in advance.
• The same model of the machine can also be slightly different in terms of feed technology, level and machine layout. Any change will seriously affect the performance of the machine.
• Last but not least, the machine should be operated by a professional operator. The dewatering machine requires a highly skilled operator’s function. A lot of things depend on the operator’s function. The main problem that most staff members suffer is the lack of skilled operators. So this aspect of the machine is as important as the rest.
Drilling decanter centrifuge is equipment used to separate solids and fluid from a mixture using centrifugal force. Centrifugal force is a force, arising from the body’s inertia.
Drilling Decanter centrifuge technique replaces the conventional method of settling down the solids in the process of water treatment and likes. The technique makes the process faster and improves the quality of the output at the same time.
The drilling waste largely consists of drill cuttings and drilling fluids that are commonly called as drilling mud. Drilling cuttings are nothing but the rock shavings acquired during the borehole drilling process and the drilling mud is a mixture of chemicals that aids the drilling process by keeping the drilling bit cool and lubricated during the process of drilling.
Other than petrochemical industry the Decanter centrifuge has its application in number of other industries as well, e.g. food processing, waste water treatment, fish processing, chemical, mineral processing, organic chemicals, polymer and inorganic chemical industry to name a few.
Due to its wide popularity across different industries, a decanter centrifuge is available in various types and variety of designs. A few notable ones being – vertical orientation, horizontal orientation and conveyer or scroll type. Operators will be using their discretion to choose the appropriate type and design as per the application need, as that remains customizable.
The performance of same design and type of decanter centrifuge may also differ in two industries, as the performance will largely depend upon number of external factors, chief among them will be the type of the waste material they will be treating with. As the guiding principle of a centrifuge is the separation of fluid by buoyancy of the material it works on to separate.
Drilling Decanter Centrifuge operates on the principle of centrifugal force. It is based on separation of material via buoyancy. The centrifugal force is applied for accelerated settling of solids by increasing g-force.
So a lot of components get covered in the working of a decanter centrifuge – g-force, accelerated centrifugal force, viscosity of fluid in which solids are submerged, speed of conveyers, density of different matters, feed rate, etc.
Drilling Decanter Centrifuge applied in solid control system of an oilfield drilling operation would typically be the last phase equipment in the process. The equipment will create high degree centrifugal force in the bowl to separate drilling fluid from the drilling waste .
The centrifugal force created by the centrifuge will contribute in this separation and the solid thus obtained will be carried through a conveyer that’s running at a different speed than the bowl, for further discharge. The g-force applied to the bowl will be anywhere between 1000 Gs to 4000 Gs.
The material to be filtered will be fed to the decanter centrifuge at a certain rate or speed, the bowl in which they are carried, will be set to rotate at a certain rate and inside the bowl, the conveyer will be running at different/slower speed to carry of the solids. The rotations will generate centrifugal force inside the bowl that will force the drilling cutting to settle out and the fluid or mud will be collected in the center of the bowl for discharge.
As we know the actual output will greatly vary depending upon the earlier mentioned aspects, different designs and types will use different dimensions. The size of the decanter or the diameter, rotation per minute, limit of g-force, density of material, rate of feeding the material, and the differential speed of conveyer to carry separated solid for discharge. All of these factors could be manipulated to achieve the desired output from the decanter centrifuge equipment. Another factor is for how long the material was stored or kept inside the bowl.
Decanter centrifuge design is very popular by customer at home and abroad.
A machine which operates on the basis of centrifugal force to separate out different components is called a centrifuge. Centrifugal force is the force experienced by a body when it is rotated at high speed. They are normally used to separate out components of different densities such as water and solids. A decanter centrifuge is a special type of centrifuge that separates out solid components from liquids such as drilling waste.
Decanter centrifuge plays an important part in the process of wastewater treatment, chemical industries and food processors. The performance of a decanter centrifuge depends on several different factors.
Most of the drilling and treatment plants deal with a mixture of components. It is imperative to have them separated out for further treatment. Mainly three types of decanter centrifuges are employed in the industries: horizontal, vertical and conveyor. A decanter centrifuge is essentially a bowl that is rotated at high speeds to separate out solids from liquid base. In case of drilling industry the input is drilling waste.
Centrifuges are quite easy to install and require less maintenance. Even though skilled operators are required to operate them, decanter centrifuges helps in saving a lot of money and increases the overall efficiency of an industry. Centrifuges offer more flexibility and better feedback mechanism. This allows the operators to allow the machine to work at different settings to separate out different components. The space required for setting up the machine is very small and easy to start up or shut down, allowing more than one unit to work at a time.
Decanter centrifuges are also not without its limitations. The machines cause a lot of noise and vibration. It cannot separate biological components and has high energy consumption. The initial cost for setting up the machine is quite high. The rotating parts are also liable to wear and tear over time.