Rotary Drum Dryer for Fertilizer with Under 2%-5% Moisture Continuous Heat Exchange and Lifting Flights

Rotary drum dryer for fertilizer

1.Product Introduction

A Rotary Drum Dryer for fertilizer is essential industrial equipment designed to reduce the moisture content of freshly granulated organic and compound fertilizers. Newly formed fertilizer granules usually carry high moisture, making them soft and prone to caking. This dryer uses controlled, uniform heat to lower moisture levels to under 2%–5%, significantly increasing granule strength, preventing clumping, and extending shelf life.

2.Application

• Compound Fertilizer Production: Drying NPK (Nitrogen, Phosphorus, Potassium) and chemical fertilizer granules.

• Organic Fertilizer Processing: Drying granulated organic fertilizers made from animal manure, compost, straw, or municipal waste.

• Bio-Fertilizer Lines: Safely drying microbial and biological fertilizers using low-temperature settings to protect beneficial bacteria.

• BB (Bulk Blending) Fertilizer: Pre-drying raw materials to ensure they mix uniformly without absorbing moisture.

3.Working Principle

The dryer operates on a continuous, tightly sealed heat exchange mechanism:

• Feeding: Wet coal is continuously fed into the slightly inclined, rotating cylindrical drum.

• Cascading & Drying: Internal lifting flights and chains lift the coal and shower it through the hot air stream. This constant movement breaks up clumps and creates a uniform curtain of coal, allowing rapid heat transfer and moisture evaporation.

• Discharge & Safety Control: The dried coal slides to the lower discharge end. An induced draft fan pulls the moist air out through a cyclone and baghouse filter to capture fine coal dust. Safety systems, such as inert gas injection or explosion relief valves, are often integrated to manage combustible coal dust safely.

4.Technical Specifications