Triple-pass Rotary Sand Dryer

Product Introduction

The sand dryer, also known as a Triple-pass rotary dryer or a three-return cylinder dryer, is an industrial dryer designed for non-viscous, liquid materials. It is a development and improvement based on the single-cylinder dryer. The three-cylinder dryer, manufactured by TongDing company, is currently available with mature technology. It effectively dries various materials such as sand, fly ash, coal, mineral materials, and slag, producing excellent drying results.

Layout Reference

Working Principle

1.The sand is transported to the silo either by a belt conveyor or a bucket elevator, and then transported to the feed end through the silo feeder. In order to facilitate the smooth flow of sand into the dryer, the inclination of the feeding pipeline should exceed the natural inclination of the materials. The rotating cylinder of the dryer is slightly inclined to the horizon, allowing for the material to be fed from the higher end while the heat carrier enters from the lower end, producing adverse contact between them. Sometimes, they can be fed into the cylinder together. As the cylinder rotates, the sand is carried to the lower side by gravity.

2.During the forward movement of the sand, the wet raw material is directly or indirectly roasted by the heat, allowing for rapid drying. The final product is discharged through either a belt conveyor or a screw conveyor. A shoveling plate is installed in the dryer to increase the contact area between the airflow and materials, enhance efficiency, and promote material flow.

3.The heat carrier used is typically hot air or flue gas, among others. Following the dryer process, a cyclone dust collector is necessary to capture items in the airflow. To further reduce the dust load of the exhaust, it is recommended to use either a bag-type or wet-type dust collector and then discharge the waste gas accordingly.

   

Advantages

High Drying Efficiency with Uniform & Stable Results

1.Modular lifting blades: Suitable for various materials such as sand; achieves drying uniformity >95% and moisture deviation ≤1%.
2.Patented multi-bend lifting plates: Create a full-cross-section material curtain to enhance hot air penetration, increasing heat exchange efficiency by approximately 25%.
3.Zoned drying: Features high-temperature, constant-temperature, and cooling zones to prevent material overheating or degradation, ensuring consistent product quality.

Significant Energy Saving & Low Operating Costs

1.Optimized Combustion Chamber Structure: Ensures more complete fuel combustion, improving fuel utilization by 15%–20%.

2.Zero Axial Thrust Drive: Reduces idler load, lowering drive power by over 30% and cutting electricity consumption.

3.Precision Air Induction & Sealing(Heavy Hammer Valve & Sand Discharge Bin Transition Section): Greatly reduces heat loss, enhancing overall thermal efficiency and lowering unit energy consumption.

Stable & Reliable Operation with Low Maintenance

1.Dual-sealing Structure: Effectively blocks cold air ingress and hot air leakage, maintaining a stable internal thermal environment.

2.Triple-cylinderdesign: compact structure with small footprint.

Strong Adaptability for a Wide Range of Materials

1.Broad Material Compatibility: Handles granularand powdery materials with moisture content 5%–30% and particle size 0.1–30 mm.

2.Adjustable Material Residence Time: Tunable via cylinder speed and lifting plate configuration to meet diverse drying process requirements.

3.Flexible Heat Source Options: Supports natural gas, biomass, and other fuels, with adjustable temperatures to match material characteristics.

Eco-friendly Operation & High Automation

1.Customized Dust Removal System: Equipped with pulse bag filters for compliant exhaust emissions and recyclable dust collection.

2.Real-time Automatic Monitoring: Auto-monitors temperature, moisture, and negative pressure for stable processes and simple operation.

Applicable Materials

Foundry sand, Quartz sand, Garnet sand, Emery, Kuala kangsar, Sand, River sand, Sea sand.

Service

Tongding Machinery Triple-Pass Dryer – Foreign Trade Services

1. We provide multilingual technical proposals, quotations, and export customs clearance support, with equipment customizable to meet specific overseas operational requirements.

2. The complete unit complies with export standards and features secure packaging; we assist in arranging sea and land transport and provide end-to-end logistics tracking.

3. Professional engineers are available for on-site guidance regarding installation, commissioning, and startup, as well as providing hands-on operational training.

4. We supply English operation manuals, electrical schematics, and video tutorials, alongside 24-hour remote technical support.

5. We offer warranties on core components, long-term supply of genuine spare parts, and fast cross-border shipping.

6. We provide lifetime after-sales maintenance and regular follow-ups, assisting customers in optimizing drying processes and ensuring stable production.

Inquiry

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