Rotary dryer systems integrate drying, conveying, dust removal, and intelligent control, making them key equipment for processing large quantities of wet materials and achieving efficient resource utilization and clean production. Their mature design and stable operation make them suitable for drying various materials, chẳng hạn như quặng, slag, chemical raw materials, agricultural and forestry byproducts, and environmental sludge.
A rotary dryer is a type of continuous drying equipment widely used in industrial production. It can efficiently and uniformly remove moisture from loose, wet materials using heat energy.
The main body of the equipment is a rotatable, slightly inclined elongated cylinder. Wet material enters from the top of the cylinder and is continuously lifted and dispersed as the cylinder rotates, forming a uniform material curtain. This material curtain then comes into full contact with the hot air flowing through the cylinder, rapidly completing the heat transfer and moisture evaporation process. Cuối cùng, the dried material is discharged from the bottom.
| Người mẫu (tôi) | slope(%) | Production (tons/hour) | Quyền lực (kilowatts) | Rotational speed (revolutions per minute) | Cân nặng (tấn) |
| 1.9*36 | 4 | 2.5-3 | 30 | 0.53-1.59 | 53 |
| 2.1*36 | 4 | 4 | 30/10 | 0.5-1.51 | 75 |
| 1.2*35 | 3 | 2-4 | 22 | 0.5-1.6 | 34 |
| 1.6*32 | 3 | 2-4 | 15 | 0.158-0.258 | 46.82 |
| 1.8*45 | 4 | 3.5 | 30/10 | 0.66-1.98 | 80 |
Wet material is fed evenly and continuously into the rotary drying drum via a closed feeding device (VÍ DỤ., a belt conveyor). The inner wall of the drum is equipped with multiple sets of carefully designed lifting plates. As the drum rotates at a constant speed, the lifting plates continuously elevate the material to a certain height and then evenly distribute it across the drum.
This cyclical motion forms a dispersed material curtain, significantly increasing the contact area between the material and the hot air. Hơn nữa, because the drum is at a certain angle, the material naturally and slowly moves from the inlet to the outlet during repeated dispersion, achieving continuous conveying.
The system is equipped with a dedicated hot air furnace (which can be heated by coal, natural gas, dầu, Sinh khối, hoặc điện, depending on requirements) to generate clean, high-temperature hot air. Driven by an induced draft fan, this hot airflow flows through the entire cylinder in a parallel or counter-current manner, fully and dynamically mixing with the falling material curtain.
Heat Transfer: Heat is primarily transferred directly from the hot air to the material surface via convection; simultaneously, the thermal radiation from the high-temperature cylindrical wall also contributes to heating the material.
Dehumidification: Moisture on the material’s surface and inside evaporates rapidly after absorbing heat. The flowing hot air not only provides heat but also acts as a moisture carrier, promptly carrying away the evaporated water vapor from the material’s surface.
After heat exchange, the exhaust gas, with its temperature reduced and humidity increased, is discharged from the end of the cylinder. To implement the concept of environmentally friendly production, this system is equipped with a two-stage dust removal device as standard:
First-stage purification: Dust-laden exhaust gas first enters a cyclone dust collector, where centrifugal force separates and collects most of the coarser particles during high-speed rotation, achieving material recovery.
Deep purification: Subsequently, the gas enters a pulse-jet bag filter. Its internal high-efficiency filter bags can capture submicron-sized fine dust, achieving extremely high purification efficiency and ensuring that the final exhaust gas fully complies with national environmental protection standards.
The dried finished product is discharged through a sealing device at the outlet and then transported to a storage point via conveyor equipment, completing the entire drying process.
Rotary dryer This equipment boasts powerful processing capacity and continuous, stable operation. Its industrial-grade continuous design enables stable operation around the clock. With a wide range of single-unit processing capacities (from several tons to hundreds of tons per hour), it can meet the continuous feeding and drying needs of large-scale industrial production, thus achieving high production efficiency.
Rotary dryer The unique combination of the lifting plate design and the rotating drum ensures continuous mixing of materials during the drying process. This avoids localized overheating or under-drying, resulting in a finished product with uniform moisture content, stable physicochemical properties, and significantly increased added value.
Rotary dryer This rotary sand dryer can flexibly handle materials with varying initial and final moisture content requirements and different heat-sensitive properties by adjusting parameters such as drum speed, tilt angle, hot air temperature, and flow rate. The equipment can adapt to changes in material particle size and viscosity, making it suitable for a variety of applications.
Rotary dryer The rotary cone dryer employs multi-layer insulation with high-quality insulation materials, combined with a special sealing structure at the inlet and outlet ends, effectively reducing heat loss from the cylinder surface and air leakage within the system. Its thermal efficiency is significantly higher than ordinary equipment, resulting in substantial fuel cost savings over long-term operation.
Support roller system: Featuring a heavy-duty design, a rationally structured bearing housing, and multiple lubrication options (such as manual and automatic oil lubrication), this system significantly reduces wear on the hubs and support rollers, avoids the risk of shaft breakage, extends service life, and extends maintenance intervals.
Transmission System: Ample power configuration and smooth, reliable transmission ensure long-term stable operation of the equipment under heavy load conditions.
Rotary dryer The highly efficient “cyclone + pulse bag” two-stage dust collection combination achieves a dust collection rate of over 99.9%, ensuring no dust escapes from the production site. Exhaust gas emissions fully meet or exceed national and local environmental emission requirements, helping enterprises achieve green production.
Rotary dryer The entire system can be centrally controlled using an advanced PLC programmable controller, coupled with variable frequency speed control technology, enabling one-button start/stop, parameter setting, operational status monitoring, and fault alarms. An optional industrial video monitoring system can be added, allowing for direct monitoring of the actual operation from the central control room, significantly reducing labor intensity and reliance on operator experience, thus achieving modern and intelligent management.
Rotary kiln dryers are indispensable drying equipment in many basic industrial sectors. Typical applications include:
Mining Resources Industry: Drying of iron ore concentrate, copper ore concentrate, fluorite ore, clay, kaolin, bentonite, and other concentrates, as well as various metallic and non-metallic minerals.
Building Materials Industry: Drying of raw materials for cement production, such as slag, clay, coal powder, fly ash, gypsum, and sand.
Chemical and Fertilizer Industry: Drying and cooling of materials such as fertilizers, compound fertilizers, feed additives, calcium carbonate, sắc tố, and chemical crystals.
Agriculture and Environmental Engineering: Resource-based drying and treatment of biomass and waste such as distiller’s grains, Bữa ăn đậu nành, rơm, livestock and poultry manure, municipal sludge, and industrial sludge.
Feed and Food Processing: Dehydration and drying of feed ingredients (such as DDGS), plant fibers, potato residue, and vegetable slices.
Choosing us as your rotary dryer supplier will provide you with value beyond the equipment itself and comprehensive cooperation guarantees:
We can manufacture the dryer cylinder and internal structure using various materials such as carbon steel, stainless steel (304, 316L), and special heat-resistant or corrosion-resistant alloys, based on the corrosiveness (acidity/alkalinity), abrasion resistance, cleanliness (VÍ DỤ., food-grade), or high-temperature characteristics of your materials. This ensures the core durability and process adaptability of the equipment.
We offer a full range of heat source options, including various coal/gas/oil-fired hot air furnaces, biomass burners, steam heat exchangers, thermal oil furnaces, and electric heaters. We will conduct a comprehensive economic analysis based on your local energy prices, policy guidelines, and ease of use to recommend the optimal heat source configuration, optimizing your operating costs from the outset.
Our support roller assembly utilizes special heat treatment processes and precision machining, combined with a scientific lubrication design, fundamentally solving common industry problems such as abnormal wear and overheating. This equipment boasts industry-leading stability and reliability, effectively extending maintenance cycles and reducing overall maintenance costs.
We have standardized production workshops and a comprehensive quality inspection system to ensure equipment quality. From initial technical consultation and solution design to installation, vận hành thử, and operation training, and even long-term after-sales technical support and spare parts supply, our professional engineering team will provide comprehensive and timely service responses, making us a trustworthy long-term partner.
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