direct heat rotary dryer design
A simplied diagram of a directheat rotary dryer is presented in Figure 71 The direction of gas flow through the cylinder relative to the solids is dictated mainly by the properties of the
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A simplied diagram of a directheat rotary dryer is presented in Figure 71 The direction of gas flow through the cylinder relative to the solids is dictated mainly by the properties of the
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Introduction Direct heat rotary driers are used to lower the moisture content of materials passing through the dryer Materials are directly heated using heat from a combustion process the fuel used is typically gas although pulverised coal light fuel oil or waste process gasses could also be used
For evaporating the moisture from the wet raw material Rotary Dryers are designed and constructed for high efficiency and economy in fuel consumption The rotary dryer machines has the direct heating type in direct heating type Direct heating type rotary dryer machine are used to apply heat hot air to contact and heat the raw material such as sawdust wood chips chicken manure silica
Rotary Dryer Capacity Table ROTARY DRYERS DirectHeat Design Size of Dryer Cap Tons per 24 Hours Dimensions RPM HP of Motor Shipping Weight Lbs Motor Drive L W H 24″dx15’1 18 26’6″ 3’8″ 7’9″ 7½ 3 12000 24″dx20’1 25 31‘6″ 3’8″ 8’2″ 7½ 3 13000 36″dx20’1 55 33’0″ 4’10” 8’8″ 5 5 14400 17
Process Advantages of Direct Heat Drying 1 Rugged design is well suited for handling high tonnage inorganic materials such as aggregate sand and foundry waste 2 Due to the lifting design DHD dryers can accommodate high moisture organic materials such as
A rotary dryer is said to be of the direct type if by virtue of its design heat is added to or removed from the solids by direct exchange between the gas and solids The direct heat dryers are the simplest and the most economical class They are used when direct
PATTERSON Industries Canada The Process Equipment People designs engineers and manufactures Rotary Dryers and Systems for various industrial processes and applications PATTERSON Rotary Dryers can be designed for Direct heat or Indirect Heat processes and with cocurrent flow of product same direction as heat flow or counterflow of product in opposite direction to heat flow
Direct Rotary Drum Dryers 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 Rotary Dryer Drier
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The rotary dryer design consists principally of a rotating cylinder that is enclosed in a furnace along its active length With heat transfer indirect and through the cylinder wall the gas velocities within an indirect dryer are low as compared to a direct heat dryer and correspondingly the offgas system is smaller and more economical
A rotary direct heat dryer seems to be a basic and simple piece of equipment It consists of a steel tube that rotates on a set of steel tires riding rings which rests on a set of rollers trunnions and is powered by a gear or chain drive Material is fed into one end and usually discharges out the other end
Louisville Steam Tube Dryers are indirect heat dryers utilizing the latent heat from clean lowtemperature saturated steam rather than hot gases from fossil fuelfired combustion systems This highly efficient heat transfer design also makes Louisville Steam Tube Dryers one of the most thermally efficient drying technologies
Rotary drum dryer adopts slightly tilted drum which can be rotated The wet materials are sent to hopper of rotary dryer by belt conveyor or bucket elevator from the higher side and welldried materials are collected from the other lower side and hot air enters the drum from the feeding side or discharging side according to user needs
