Triple-pass Sand Dryer

Sand dryer 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.

 

Sand Dryer Machine Layout Reference

Sand Drying Machine 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.

   

Triple-pass Rotary Sand Dryer Advantages Compared With Single-drum Dryer

1. Three-layer self-insulating design: thermal efficiency increases by 40%, cutting fuel costs in half.
2. Half the footprint for the same output: significantly reduces civil engineering investment.
3. Production capacity: over 50% higher than traditional single-drum dryers.
4. Low discharge temperature: material can be stored immediately, eliminating the need for cooling equipment.
5. Uniform drying: consistent final moisture content of ≤0.5%.
6. Sealed dust removal: eco-friendly operation with no dust pollution.
7.Save fuel：Save 30%-50% on fuel than Single-drum Dryer

Sand Rotary Dryer Applicable Materials

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

Slag，Stone powder，Iron powder，Plate sand ，Casting sand，Facturing sand ,Fly ash,and other materials.

Tongding Service And Support

1.Provide customized solution design for global customers, according to raw materials, capacity, local climate and site layout.
2.Supply full set of sand drying equipment with standard export packaging, safe sea/land transportation and smooth customs clearance support.
3.Arrange professional engineers for overseas on-site installation, commissioning and operation training to ensure quick production.
4.Offer complete multilingual documents including English operation manuals, electrical drawings and video tutorials.
5.Support 24/7 remote technical support worldwide for fast troubleshooting and production guidance.
6.Supply original spare parts with global delivery service to reduce equipment downtime.
7.Provide long-term after-sales maintenance, regular follow-up and equipment upgrading services for global clients.
8.Serve customers all over the world with consistent high-quality service.

 

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