rotary dryer project

rotary dryers

rotary dryers

Weve built a reputation on building the best rotary dryers in the industry. All of our dryers are custom designed to suit the unique processing needs of your material. Whether you require low or high inlet temperatures, short or long residence times, counter current or co-current flow, FEECOs design team can design a rotary drum dryer for your application.

Rotary dryers are a highly efficient industrial drying option for bulk solids. They are often chosen for their robust processing capabilities and their ability to produce uniform results despite variance in feedstock.

The drum is positioned at a slight horizontal slope to allow gravity to assist in moving material through the drum. As the drum rotates, lifting flights pick up the material and drop it through the air stream in order to maximize heat transfer efficiency. When working with agglomerates, the tumbling action imparted by the dryer offers the added benefit of further rounding and polishing the granules.

All FEECO equipment and process systems can be outfitted with the latest in automation controls from Rockwell Automation. The unique combination of proprietary Rockwell Automation controls and software, combined with our extensive experience in process design and enhancements with hundreds of materials provides an unparalleled experience for customers seeking innovative process solutions and equipment.

Rotary dryers are known as the workhorse of industrial dryers. They are able to process a wide variety of materials, and can lend a hand in nearly any industry requiring industrial drying solutions. Some of the most common industries and materials in which rotary dryers are employed include:

Unlike direct dryers, indirect dryers do not rely on direct contact between the material and process gas to dry the material. Instead, the rotating drum is enclosed in a furnace, which is externally heated. Contact with the heated drum shell is what dries the material.

Benefits of Drying Copper Concentrates InfographicMetallurgical Coke Dryer and Bucket Elevators Project ProfileSingle Pass vs Triple Pass Rotary Dryers (Driers)Rotary Dryer (Drier) for Coke DryingSand Dryers (Driers)Co-Current Vs Counter Current Rotary Drum Dryers (Driers)Rotary Dryer (Drier) with Combustion Chamber for Centrifuged MaterialRotary Dryer for Centrifuged MaterialVFDs in Process EquipmentRotary Dryer (Drier) Combustion Chamber DuctingCombustion Chamber with Burner Mounted onto Rotary Drum Dryer (Drier)FEECO Combustion Chamber ModelRotary Drum Dryer (Drier) with Combustion ChamberQuestions to Ask When Purchasing a Rotary Dryer (Drier)Rotary Dryer (Drier) FlightsFEECO Rotary Dryer (Drier)FEECO Rotary Drum Dryer (Drier)Rotary Drum Dryer (Drier) ReplacementBedding Dryers (Driers)Mineral Dryer (Drier), Rotary Drum DryerDried Limestone PelletsVermiculite Dried in a Rotary Dryer (Drier)Rotary Drum Dryer (Drier) TestingMineral Drying Featured Image, Rotary Drum DryingRotary Dryer (Drier) Testing ThumbnailRotary Drum Dryer (Drier) TestingKnowing When its Time to Replace Your Rotary Drum Seal, Leaf SealRotary Drum Drive ComponentsRotary Drum BreechingReplacement Rotary Drum BearingsResource of the Week: Rotary Dryer (Drier) and Cooler BrochureReplacement Dryer (Drier) and Kiln BurnersCombustion ChambersReplacement Drum Flights, Rotary Dryer (Drier) and Cooler FlightsReplacement Rotary Drum ShellRotary Drum Laser Alignment Process, Rotary Drum AlignmentWhy Post Maintenance Alignment is Critical to Rotary DrumsCauses of Tire (Tyre) and Trunnion Wear, Rotary Drum TireFEECO Tire (Tyre) Grinding Machine, Tire and Trunnion Grinding in ProgressRotary Drum Tire (Tyre) Wear Pattern from Excessive Wheel Skewing, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Poor Housekeeping Practices, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Misalignment, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Using Improper Tire Lubricant, Rotary Drum Tire in Need of Tire GrindingTire (Tyre) and Trunnion Wheel GrindingTire (Tyre) and Trunnion GrindingResource of the Week: Limestone Drying Slideshare Presentation Replacement Rotary Drum PartsResource of the Week: Slideshare Presentation on Rotary Dryers (Driers) for Frac SandRotary Drum Thrust RollersRotary Drum Trunnion Wheels (Rollers)Rotary Drum Riding Ring (Tire/Tyre)Rotary Dryer (Drier) Process AuditsResource of the Week: Rotary Dryer (Drier) Sizing and Design Slideshare PresentationResource of the Week: Girth Gears PageRotary Drum Knocking SystemsSpring-Mounted Replacement Rotary Drum Girth GearResource of the Week: Frac Sand Dryers (Driers) Project Profile3D Model of a FEECO Indirect Rotary DryerRotary Dryers (Driers) in the Fertilizer (Fertiliser) IndustryRotary Dryer (Drier) with Trommel Screen (aka., grizzly)Combustion Chamber on Manure Dryer (Drier)Double-Bend Dryer (Drier) FlightsBurner and Combustion Chamber on a Rotary Dryer (Drier)Rotary Dryer (Drier) Advancing FlightsFEECO Rotary Dryer (Drier) Flight SimulatorRotary Drum Drive BaseRotary Dryer (Drier) Burner and Combustion ChamberBucket Elevator Shown Feeding Rotary Dryer (Drier)Rotary Dryer (Drier) Exhaust Handling SystemFEECO Rotary Dryer (Drier) Complete SystemResource of the Week: FEECO Flight/Lifter Simulator BrochureResource of the Week: Tire Grinding BrochureResource of the Week: Unitized Drive Base BrochureFEECO Rotary Dryer (Drier)Rotary Dryer (Drier) Design 101: Defining Your Atmosphere View All >

Our rotary dryers are built to the highest quality standards, with longevity in mind. The best part about buying a FEECO rotary dryer, is that you get the security of knowing your equipment is backed by over 60 years of experience, material and process knowledge, and a proven track record.

complete rotary dryer design and calculation-palet

complete rotary dryer design and calculation-palet

Rotary DryerfromQingdao Palet Machinerycan reduce the biomass material moisture content from 40-55% to below 10% -15%, according to the customers request. How to choose the rotary dryer design for wood chips?Wehave finished a successful project for wood chips dryer in Malaysia.

Qingdao palet machinery co,.ltd is a professional manufacturer of biomass wood pellet mill, wood pellet plant, rotary dryer, activated carbon rotary klin,activated carbon machine, hammer mill, crusher, etc.

rotary louvre dryer project | 3di process equipment

rotary louvre dryer project | 3di process equipment

3DI Equipment have just undertaken the purchase and removal of a rotary louvre dryer from a sugar manufacturing facility.The dryer was 3.5 metres wide and 9 metres long and weighed 25tons. The removal of the rotary louvre dryer proved a real challenge for 3DI's team of riggers dueits location within the facility and theshort time frame allocatedfor removal. However after a week of preparation they have safely and successfully removed the dryer and its accessories from the building and loaded to transport. The dryeris currently beingpacked ready for shipment abroad to be installed within another facility.

rotary dryer design & working principle

rotary dryer design & working principle

For evaporating moisture from concentrates or other products from plant operations, Rotary Dryers are designed and constructed for high efficiency and economy in fuel consumption.Whenever possible to apply heat direct to the material to be dried, Rotary Dryers of the Direct Heating Design are used. If it is not possible to apply heat direct to the material to be dried, Rotary Dryers of the Indirect Heating Design can be furnished so that the heated gases will not come in direct contact with the material.

Rotary Dryer is a simple, inexpensive unit for reducing the moisture content of flotation concentrates, as well as chemical and industrial products. Frequently the saving of shipping weight so effected will pay for the dryer in a few months. Difficulties from freezing while in transit are also eliminated. Many industrial projects are now using Dryers for control and production purposes on many materials.

Three main types of Rotary Dryers can be supplied. The direct heat unit is used when it is permissible for the drying gases to come in direct contact with the material being dried. Partition plates increase the heating surface. Drying may be by hot air or exhaust gases from other operations. If this drying gas has a deleterious effect on the product, then an indirect type of dryer can be supplied. A further derivation is the Tedrow Steam Dryer.

Of the different types of dryers that there are the most common is the ROTARY DRUM DRYER/Kiln, This type of drier is common not only in the mining industry but you will find them in fertilizer plants, Cement plants, and peat hogs to name but a few.

The theories behind these machines are very simple, heat an air space up, and then tumble the material to be dried through this space until it is dried. All though it sounds simple there are problems that have to be solved before the required results are met. But first, so you know what we are talking about lets go through the design of a drier.

First is the KILN, this provides the heat, The BURNER is inside this portion. The fuel for the burner is usually diesel although heavy crude oil could be used in some cases. To be able to generate enough heat to dry the concentrate air must be added by way of a BLOWER. In front of the kiln is the point that the wet concentrate enters the drier. It is put into the revolving SHELL. The shell is on a slight incline. As the Concentrate is tumbled through the hot air mass of the drier it travels down this incline to the exit of the drier.

At this exit point the concentrate is either deposited straight into a storage area or taken to the storage area by a conveyor. It is also at this point that there is an EXHAUST HOOD. This provides a controlled escape passage for the fumes and water vapor that is generated by the concentrate drying. This is a very important function and the operator will have to be sure that it is open at all times. If it should become blocked the water vapor will not be able to escape. The concentrate will become wet and sticky which will result in the discharge plugging. The wet sticky concentrate will also lower efficiency level of the drier for an extended period of time. This happens because inside the drier shell are what are termed FLIGHTS these are flat pieces of metal that are bolted onto the shell.

They are there to lift the concentrate up to the top of the shells rotation and drop the concentrate through the hot air. If the water vapor isnt taken away, the concentrate becomes sticky from reabsorbing the water. This sticky concentrate will fill the spaces between the flights.

The concentrate will not be lifted and dropped through the hot air. This results in a long term condition of poor performance even after the initial problem has been cured. These flights will remain buried in concentrate. This removal of the water vapor is one of the functions of the blower. It assists the natural process of air movement as the hot air mass expands. To prevent the buildup of concentrate on the flights there are often CHAINS attached to them. As the drier revolves the chains slap the flights preventing concentrate from building up on dryers walls.

The drier shell is rotated separately from the stationary kiln section. To achieve the rotation a BULL GEAR is attached around the shell section. There are also two flat rings attached to the shell. These provide surfaces for support rollers to roll on. There is another problem that the inclined shell has, the incline causes the shell to want to slide in the direction of the incline. To prevent this additional rollers are attached to the last set of rollers.

rotary dryer diagram - palet

rotary dryer diagram - palet

The three layers of drums are rotated at the same number of revolutions and the material direction is as follows: the wet material enters the inner drum, returns to the middle drum from the end, goes to the first end, then to the outer drum, and finally discharges from the end of the outer drum.

AB section: preheating section, the material through the scraper conveyor into the dryer, due to the role of high-temperature hot air makes the material heat up, reaching the wet ball temperature of the hot air, at this time the material moisture barely changes, the hot air temperature is slightly reduced, the heat emitted is mainly used for preheating the material.

BC section: equal speed drying section, the drying rate is constant, there is always a layer of free water on the surface of the material in this section, the heat transferred from the hot air to the material is all used for water vaporization. As a result, the temperature of the surface of the material always remains the same as the temperature of the wet ball of air, the temperature of the hot air and the moisture of the material is rapidly reduced.

CD section: Dry into deceleration section. The internal water diffusion rate of the material is less than the surface water vaporization rate, the material surface does not have enough water, so the drying rate is reduced.

The heat transferred from the air to the material is greater than the heat consumed by the vaporization of water, so the surface temperature of the material keeps increasing and the air temperature further decreases. If the material temperature reaches the level of insulation, the material temperature will coincide with the hot air temperature.

DE section: for the cooling section, the moisture content of the material has been reduced to the required value, discharged from the dryer, into the cooling system, through the cold air, so that the temperature of the dried material quickly slightly above room temperature, directly bagged and shipped out.

Adopt the following energy-saving measures.(1) New process for high temperature fast drying(2) Exhaust gas recycling: i.e., the exhaust gas (about 100C) is mostly returned to the blending chamber and heated again as a new drying medium.(3) High efficiency coal-fired hot air furnaceThe above measures resulted in a combined heat efficiency of over 76%(4) The installed capacity of the machine is only one-eighth that of a conventional drum dryer(5) Automation of the whole machine, saving the operator and thus greatly saving power.

Due to the use of high temperature rapid drying process, the material in the drying system, the flow time is only a few minutes, in order to ensure the quality of drying, when the moisture content of the wet material changes, the corresponding drying parameters must produce changes in line with it.

This change must be done by an automated control system. In this drying system, our company designed and manufactured a unique control method, first set the water content of the material after drying, in the drying process, regardless of the initial water content of the material and hot air temperature changes, the automatic control system will automatically adjust the corresponding parameters to ensure that the set water content of dry materials.

Qingdao palet machinery co,.ltd is a professional manufacturer of biomass wood pellet mill, wood pellet plant, rotary dryer, activated carbon rotary klin,activated carbon machine, hammer mill, crusher, etc.

indirect rotary dryers - vulcan drying systems

indirect rotary dryers - vulcan drying systems

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Built for performance and reliability, Vulcan Indirect Rotary Dryers produce quality and replicable drying results. Our Indirect Rotary Dryers are one of the most versatile industrial dryers on the market. Our modular approach allows you to pick the dryer size, flight arrangement, burner and air pollution control equipment to best suit your unique project.VulcanIndirect Rotary Dryers are built to rigorous safety and performance standards because they are 100% designed, manufactured and tested in the USA.

Vulcan Indirect Rotary Dryers rely on the heat transferred through the drums shell to dry the material via conduction and radiation to reduce the materials moisture content. Indirect drying allows you to tightly control the processing environment, an ideal characteristic when working with materials that can be combustible or where higher temperatures are required to remove bound water. Our indirect dryer units can have tumbling flights (optional) and an air stream heat exchanger (optional) mounted in the combustion chamber stacks to utilize waste heat to heat sweep air and increase drying efficiency.

Vulcan's Indirect Rotary Dryers come in standard sizes ranging from 3 diameter by 15 long to 8diameter by 60 long. Whether you have a small 1TPH project or a large 200TPH project, we can construct your dryer to fit your project.

Vulcan's Indirect Rotary Dryers are constructed from a variety of materials depending on your application. Each standard dryer has four options for you to choose from, but we can construct your dryer from any material that you

Your indirect rotary dryer can be customized with a number of flight options from standard to aggressive (or a combination). Knock out boxes can be added for your controls, insulation and wraps to better control temperature and an external finish paint to keep your dryer looking new for years.

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