Triple-pass Rotary Dryer

Triple-pass Rotary Dryer

The triple-pass rotary dryer consists of three concentric nested cylinders. It relies on lifting flights to shower the materials and facilitate heat exchange with the hot air stream for dehydration. Featuring a multi-stage heat exchange system and a self-insulating structure, the equipment makes full use of waste heat, ensuring high energy efficiency. Equipped with a transmission system, a multi-fuel hot air furnace, and a dust collection system, the materials travel along an S-shaped trajectory inside the drum, delivering superior drying performance.

This equipment is capable of processing granular and powdered materials with an initial moisture content of up to 50%. It is highly suitable for drying various materials, including iron powder, metal concentrates, tailings, quartz sand, river sand, bentonite, coal slime, and sewage sludge. It is widely utilized across industries such as mineral processing, building materials, chemical engineering, and environmental protection.

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ADVANTAGES

1.High Efficiency & Energy Saving: Compatible with coal, oil, and gas. It achieves a thermal efficiency of up to 80%, reducing coal consumption by 30–70% and electricity consumption by 60%.

2.Compact & Space-Saving: The overall length is only 30–35% of a single-drum dryer, reducing the footprint by 50% and civil construction costs by 50%.

3.Strong Adaptability: Capable of processing lump materials (≤20mm), granular, and powdered materials. It can withstand operating temperatures up to 750℃ (with heat-resistant steel plates available for high-temperature requirements).

4.Durability & Eco-Friendliness: Customizable with 304 or 316 stainless steel, or alloy steel plates upon request, increasing wear resistance by 4 times. The exhaust gas temperature is maintained below 100℃, and when paired with a dust collection system, the dust recovery rate exceeds 95%.

5.Intelligent Control: PLC-controlled moisture indicators enable fully automated operation, significantly reducing manual intervention.

PRODUCT STRUCTURE

The materials are fed into the inner cylinder of the triple-pass dryer via the feeding device, where the initial drying is completed in a co-current flow mode.

Driven by the lifting flights, the materials are continuously lifted, showered, and advanced in a spiral trajectory. This ensures full heat exchange with the hot air stream.

The materials then enter the middle cylinder for counter-current drying. Here, they move in a reciprocating motion, fully absorbing the radiant heat from the cylinder walls. This effectively extends the heat exchange duration, ensuring optimal drying performance.

TECHNICAL PARAMETERS

Model Specifications	GHS-2245	GHS-2506	GHS-2807	GHS-3007	GHS-3208	GHS-3608
Outer cylinder diameter (m)	2.2	2.5	2.8	3	3.2	3.6
Outer tube length (m)	4.5	6	7	7	8	8
Cylinder speed (rpm)	4-10	4-10	4-10	4-10	4-10	4-10
Motor power (kw)	5.5×2	5.5×4	7.5×4	11×4	37	45
Machine weight (t)	6	7.4	15.3	32	43	48
Initial moisture content of quartz sand (%)	6-12	6-12	6-12	6-12	6-12	6-12
Final moisture content of quartz sand (%)	1	1	1	1	1	1
Maximum intake air temperature (°C)	700-750℃	700-750℃	700-750℃	700-750℃	700-750℃	700-750℃
Production capacity (t/h)	Silica sand 10-15	Silica sand 20-25	Silica sand 30-35	Silica sand 35-45	Silica sand 50-60	Silica sand 60-75

SUCCESSFUL CASE

5 Million TPY Iron Ore Beneficiation Plant Project in Xinjiang

Philippines 500t/d Oil Fracturing Sand Processing Plant

Heilongjiang 500t/d Petroleum Proppant Processing Plant