Modern plywood drying equipment primarily operates on the principle of forced convection hot air drying:

1.  Heat Transfer: A heat source generated by a burner (oil, gas, biomass) or a steam/thermal oil heat exchanger heats the air.

2.  Moisture Removal: High-humidity hot air is forced at high speed over and through the panel stacks by circulation fans, absorbing moisture from the veneers.

3.  Dehumidification & Recirculation: Part of the moisture-laden air is expelled from the drying chamber via the dehumidification system, while fresh air is introduced and reheated to maintain precise temperature and humidity gradients inside.

4.  Intelligent Control: According to preset drying schedules (for different wood species, thicknesses, initial moisture levels), the system automatically adjusts temperature, humidity, and airspeed for scientific and efficient drying.

1.  Batch (Kiln) Dryers

      Features: A full load of panels is placed inside, and the entire drying cycle is completed before unloading. Suitable for multiple wood species, specifications, small batches, or custom production.

      Common Type: Track-based trolley kilns.

      Advantages: High flexibility, relatively lower initial investment.

      Disadvantages: Lower production efficiency compared to continuous dryers, potential batch-to-batch quality variation.

2.  Continuous Dryers

      Features: Panels move continuously through the dryer (typically on multi-tier mesh belts or roller conveyors) from inlet to outlet. Ideal for high-volume, standardized, single-species production.

      Common Type: Multi-layer mesh belt continuous dryers.

      Advantages: Very high production efficiency, high automation, uniform and stable drying quality, labor-saving.

      Disadvantages: High initial investment, less adaptable to frequent product specification changes.