❶ The triple-pass structure enables cyclic utilization of thermal energy
Traditional single-cylinder dryers rely on one-way straight-through heat exchange with a thermal efficiency of only about 60%. By adding two-stage rotary sealed silos, the triple-pass dryer forms a closed-loop circulation of hot air inside the main unit. Field tests show its thermal efficiency is increased to over 75%, and the drying energy consumption per ton is reduced by about 30%.
❷ Compact layout saves 50% of the floor space
Restricted by its linear structure, a single-cylinder dryer needs to be more than 15 meters long with a floor area of about 300 square meters. The main unit of the triple-pass dryer adopts a broken-line layout, with the overall length compressed to within 10 meters and the floor area reduced to about 150 square meters, making it particularly suitable for sand yards with limited space.
❸ Modular design supports flexible capacity matching
▸ Small 3-5 ton equipment: Only the main unit + transmission system are required, with a continuous drying capacity of 30 tons in 24 hours;
▸ Medium and large 10-30 ton systems: Five modules including wet sand silo + belt conveyor + heat source + screening + dust removal need to be configured. Natural gas/biomass heat sources are recommended, which double the emission reduction efficiency;
▸ Key parameter comparison: 10-ton triple-pass main unit vs 15-meter single-cylinder unit: 25% reduction in weight and 20% shortening of drying time.
Analysis of pain points of traditional equipment:
When processing wet sand with 8% moisture content, single-cylinder equipment is prone to uneven drying and dust overflow, and has a short maintenance cycle (≤ 1 year). With the three-stage lifting plate design of the triple-pass structure, field tests show that the powder content of finished sand is reduced by 4 percentage points, and the failure rate of the gear box is reduced by 60%.
Applicable scenario recommendations:
▸ 10-ton modular combination is recommended for river sand yards, with investment costs recoverable within 3 months;
▸ 20-ton unit with dust removal system is suggested for concrete mixing plants to meet environmental emission standards;
▸ For sand yard renovation, the drying main unit can be replaced first, and the remaining components are compatible and universal.