Triple Pass Rotary Drum Dryer_Rotary Drum Dryer_Product

lntroduction

The triple pass rotary drum dryer is designed to improve the drying efficiency and reduce the occupied space of dryer.
Triple pass rotary dryer consists of three parts: the inner drum, the middle drum and the outer drum. These three lighter-duty drums of different diameters are nested inside each other. The drum is not set on a slope, but rather relies on pneumatic conveying to carry material through the unit.
It can be used for drying wood chips, sawdust, bark, straw, coco peat, Fiber, palm silk, alfalfa hay, sugarcane bagasse, cassava residues, etc; and the final moisture content of the meterial can be less than 12%. And the final product can be applied in boiler combustion, gasification and power generation, animal feed.

System

The triple pass rotary drum dryer system is mainly composed of hot air stove, cair feeder, belt conveyor (optional), screw feeder, rotary drum dryer, fan, cyclone, etc. The three pass rotary drum dryer adopts three layers of stacked drums and combines countercurrent and cocurrent drying technology to achieve efficient and uniform drying of the raw material, Maximizing thermal efficiency. Brief Workflow 1. Material Feed and High-temperature Hot Air Wet raw material are fed by the feeder, and high-temperature hot air enters from the discharge end in a reverse flow. 2. Three-Pass Drying First Pass (outer drum, countercurrent): The raw material contacts with the high-temperature hot air, evaporating water rapidly. Second Pass (middle channel, countercurrent): Semi-dry raw material continue to move in a reverse flow for stable dehydration. Third Pass (inner channel, cocurrent): Nearly dry raw material come into contact with the low-temperature exhaust gas in a cocurrent flow, drying slowly to prevent over-drying. 3. Discharge and Dust Removal Dried material are discharged from the discharge end, and the low-temperature exhaust gas is purified and dusted before being discharged.

Advantage

1.High Efficiency The three-pass structure and countercurrent design maximize thermal energy utilization, resulting in significantly higher thermal efficiency than single-drum dryers. Compared with the single drum dryer, the length of the machine is shortened by 50%, reducing the building area and cost saving about 40%; 2. Multiple Heating Source; Customers can choose the heating source according to their needs, we can design the customized solutions; 3. Uniform Drying: Multiple spreading and a long residence time ensure uniform water content throughout the raw material; 4. Stable and Reliable Operation The system is equipped with PLC system and video monitoring system, with a high degree of automation and easy operation; and can runing continuously 5. The system has a unique sealing structure, with no heat leakage; 6. Low investment, and short investment recovery time.

Triple Pass Dryer Running Video

Technical Parameter

Model	DDSG2010	DDSG2210	DDSG2510	DDSG2512	DDSG2912
Output Capacity(t/d)	63.5-144.5	67.5-154.0	83.5-193.0	100-227.0	120.0-268.0
Vaporization(t/h)	1.850	1.976	2.427	2.912	3.432
Early moisture(%)	35-60	35-60	35-60	35-60	35-60
Final moisture(%)	12-15	12-15	12-15	12-15	12-15
Drying temperature(℃)	270±3	270±3	270±3	270±3	270±3
Total motor power(kw)	78	85	110	125	135
Total weight(kg)	25000	27000	35000	38000	43500
Plant area(m)	8*18	10*18	10*18	10*20	10*20

Except above models, we also can supply special model according to your requirements.

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