Three-pass Rotary Dryer

The three-pass dryer is also called high-efficiency combined dryer, which adopts European energy-saving embedded structure technology. The inner cylinder, middle cylinder and outer cylinder form an integrated self-insulation structure.

In addition, thermal insulation materials and stainless steel plates can be wrapped outside the drum to further reduce heat loss and improve thermal efficiency.

With unique thermal design concept, it eliminates heat loss inside air channels, expands heat exchange area and boosts volumetric evaporation intensity, delivering remarkable energy-saving performance. Complying with national policies for environment-friendly and resource-conserving society, it serves as an eco-friendly and energy-saving substitute for traditional drying equipment.

This machine is suitable for drying raw materials such as yellow sand, river sand, manufactured sand, quartz sand, slag, fly ash and mineral concentrate powder. It is widely used in building materials, chemical industry, foundry and other sectors, and can burn various fuels including coal, oil, gas, alcohol-based fuel and biomass fuel.

The three-pass dryer is suitable for drying sand and low-viscosity mineral materials. It boasts outstanding advantages including low energy consumption, fast drying speed and large processing capacity.

Features of Three-Pass Dryer

1、The equipment investment accounts for about 20% of imported foreign equipment. It is made of wear-resistant manganese steel plate, whose wear resistance is 3–4 times that of ordinary steel plates.

2、The initial moisture of materials ranges from 5% to 25%, and the final moisture can be controlled below 0.5%–1%. It is the preferred drying equipment for slag powder plants of cement factories, dry-mix mortar production lines and other drying projects.

3、Its thermal efficiency is about 40% higher than that of traditional single-cylinder dryers, with heat utilization rate over 90%.
    
4、It can use various fuels including anthracite, bituminous coal, coal gangue, oil and gas. It can dry lump, granular and powdery materials with particle size less than 20–100 mm.
    
5、It occupies about 50% less floor space than single-cylinder dryers and cuts civil engineering investment by roughly 60%, with easier installation and operation.
    
6、No air leakage occurs, thoroughly solving the sealing difficulty.

7、The discharge temperature is ≤60°C; materials can be directly sent to storage silos without cooling in cooling sheds.

8、The outer cylinder temperature is ≤60°C and exhaust gas temperature is lower than 120°C, doubling the service life of matched dust removal equipment.

9、Its coal consumption is about one third of single-cylinder dryers, power consumption reduced by around 40%, and natural gas consumption per ton of material ≤10 cubic meters.

Technical Parameters

Model	Size M	Capacity T/H	Final Moisture	Coal Consumption（KG/T砂）	Power（KW）
HCS-623	1.7×1.8	3-5	<0.5%	5-7	4.0
HCS-625	2.1×2.2	4-6	<0.5%	5-7	5.5
HCS-628	2.2×2.4	6-8	<0.5%	6-8	7.5
HCS-6210	2.5×2.7	8-12	<0.5%	8-10	4×2
HCS-6215	2.8×3.0	14-16	<0.5%	8-10	5.5×2
HCS-6220	3.0×4.0	18-22	<0.5%	8-10	4×4
HCS-6225	3.2×4.5	23-26	<0.5%	8-12	5.5×4
HCS-6230	3.0×6.0	28-35	<0.5%	8-12	7.5×4
HCS-6250	3.2×7.0	48-55	<0.5%	8-12	11×4
HCS-6280	3.8×8.0	70-80	<0.5%	8-12	15×4
HCS-6250×2	4.2×9.0	98-110	<0.5%	8-12	22×4

Note: All above technical parameters are for reference only. Equipment is under continuous improvement, subject to the latest specs. All products can be customized as required.