Raw Paddy Dryer

Raw Paddy Dryer

A raw paddy dryer is specifically designed to reduce the moisture content of freshly harvested (raw) paddy to a safe level for storage or further processing. Raw paddy has higher moisture content when compared to parboiled paddy and requires careful handling during the drying process to avoid quality deterioration, such as cracking or discoloration.

Features of a Raw Paddy Dryer

Moisture Reduction

  • Lowers moisture from 20–30% (typical for raw paddy) to 12–14%, suitable for storage and milling

Types of Raw Paddy Dryers

Batch Dryers

Common for smaller operations, allowing controlled drying of a set amount of paddy.

Continuous Flow Dryers

Used in large-scale operations for uninterrupted drying

Fluidized Bed Dryers

Efficiently dries small to medium volumes using high-velocity air

Flat-Bed Dryers

Simple and economical, best for small farmers

Key Components

  • Air Heating System: Uses biomass furnace, gas, or Boilers to generate hot air

  • Airflow System: Ensures even distribution of heat across the grain for uniform drying

  • Control Systems: Automated temperature and moisture control to prevent grain cracking or discoloration

Energy Efficiency

  • Modern dryers often incorporate features like heat recovery systems to improve efficiency and reduce fuel consumption

Drying Time

  • Typically takes 4–8 hours, depending on initial moisture content, paddy variety, and dryer type

Advantages of Raw Paddy Dryers

Prevents fungal growth, discoloration, and grain cracking.

Speeds up the drying process compared to sun drying.

Results in fewer broken grains and higher head rice yield during milling.

Can handle varying paddy volumes and moisture levels.

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