Rotary drum dryer
Advantage and Features
- Rotary drum dryer by Palet Machinery is specially designed for drying the sawdust, wood shavings, wood chips, woodblocks, rice hull, chicken manure, grass, bean dredges, cassava residue, cassava residue, sludge,etc.
- The structure of the rotary dryer adopts the means of cylinder marginal transmission, flange connection, direct heat transfer.
- Large capacity and fully automatic.
- Low energy cost and low resistance.
- suitable for a wild range of material sizes.
- Stainable, low cost of operation, product the average humidity reduction is good.
rotary drum dryer working principle
Table of Contents
Rotary dryer specification and parameter
|Model||Specification (m)||Capacity（T/h)||Rotate speed（r/min)||Power(kw)||Install angle(°）||weight(T)|
Rotary dryer application
- Building materials industry: drying raw materials used in construction and engineering, mainly sand, river sand, yellow sand, cement, clay, grass charcoal soil, etc.
- Agriculture: drying wine lees, chicken manure,straw and sawdust,alfalfa,wood chips ,wood shaving,etc.
- Industrial industry: drying industrial products or by-products, such as drying paper mill offcuts waste paper pulp, plastic waste, desulfurization gypsum, fly ash and industrial sludge, etc.
- Mineral processing industry: used in the process of processing various mineral products after mining, to play a role in bulk drying, can dry materials such as: coal processing industry coal sludge, lignite, cinder, flotation coal, etc.; smelting processing industry ore, mineral powder, slag, copper ore, laterite nickel powder, tailing slag, etc.; sand and gravel industry quartz sand, limestone, active lime, etc.
Rotary dryer systems
|1||Materials||7||Feeding Cover||13||Pinion gear||19||Cyclone separator|
|2||Feeding Conveyor||8||Roller Ring||14||Couplings||20||Pipe|
|3||Fuel elevator||9||Carrier Roller||15||Motor||21||Chimney|
|4||Hot air furnace/Gas Stove||10||Rotary dryer||16||Retaining Wheel||22||Fan|
|5||Hot air pipe||11||Gear Box||17||Sealing Ring||23||Discharging Conveyor|
|6||Inlet||12||Large Gear||18||Outlet||24||Finished product|
What is the principle of the rotary dryer？
The Materials to be dried enter into the dry zone of special combination plates are thrown by drying plate for vertical movement because of angle difference and rotational motion of the drying plate. After making heat exchange with the materials, the high-temperature furnace gas discharged into the cylinder evaporates water and drys the material, it can prevent the material from sticking on the inside of the cylinder. It is a part of the pellet mill plant.
Rotary drum dryer design(Rotary Dryer Calculations)
The information as follows:
the production is 2 ton per hour.
A：Drying intensity (38kg/m3h)
G1：Dry Material Production (2t/h)
V：Dry Space needed(m3)
W1：Initial Moisture Content(60%)
W2：Final Moisture Content(15%)
For every 1000kg wet material evaporation and moisture content：
For every 1000kg wet material quantity after evaporate：
To produce 1000kg of end product need to feed in：
G=1000/470.5×1000=2125.3kg(wet raw material)
Rotary Dryer Calculation：
Provided Rotary Dryer dimension:φ2.0×20m
Classification of rotary dryers
- Direct-heated rotary dryer. The parallel current type, counter-current type, and staggered flow type
- Indirect-heated rotary dryer. The built-in heating tube type and cylinder wall heating type
- Special types, such as triple pass rotary drum dryer
The parallel current type direct-heated rotary dryer
The material is dried in direct contact with hot air. Parallel flow type is the hot air and materials moving in the same direction, even if the hot air temperature at the entrance is higher because the material is in the surface evaporation stage, the product temperature still roughly maintains the humidity temperature.
The material on the exit side is in the temperature rise stage, because the hot air temperature drops, so the product temperature does not rise much. Therefore, even if the hot air temperature is high, the product quality will not be decreased.
Counter current type direct-heated rotary dryer
Counter-flow type is the direction of hot air flow is opposite to the direction of material movement. This can produce a large average temperature difference and a good heat transfer effect. It can be used for materials with high humidity and low combustibility, such as sludge.
Rotary dryer details show
small gear and big gear
rotary dryer riding wheel
What is the key part of Rotary drum dryer？
Rotary dryer riding wheel
Rotary dryer big gear
How to Correctly Operate Rotary Drum Dryer ?
we prepare the teaching videos in terms of installation, operation, parts replacements, repair and maintenance parts. And 7/24 email and phone call service is available.
The videos of rotary drum dryer
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