20TPH RDF Rotary Dryer Production Line

Introduction

RDF (Refuse Derived Fuel) drying production line is an industrial system specifically designed to process the combustible fraction of municipal solid waste (MSW). By utilizing processes such as drying, shredding, and sorting, it converts organic waste, plastics, and paper into high-calorific alternative fuel (RDF), which is widely utilized in fields such as cement kiln co-processing, biomass power generation, and waste-to-energy incineration."

The core objective of this production line is to enhance the combustion efficiency and storage stability of RDF. It typically includes the following key stages:

I. Preprocessing System

• Crushing and Screening

  • Utilizes primary and secondary shredders to reduce raw waste to an appropriate particle size (typically below 30mm).

  • Employs trommel screens or vibratory screens to separate non-combustibles (such as stones and metals), thereby improving RDF purity.

• Sorting Technology

  • Magnetic separators for ferrous metal removal.

  • Eddy current separators for non-ferrous metal recovery.

  • Optical sorting or air classification to further refine the combustible materials.

II. Core Drying System

Drying is a critical step in RDF production, directly affecting the fuel's calorific value and combustion performance.

• Rotary Drum Dryers

  • Suitable for direct or indirect heated drying of high-moisture materials (e.g., food waste residue, biogas residue).

  • Features a compact structure and high heat transfer efficiency, though dust explosion protection is required.

• Heat Source Options

  • Compatible with various heat sources including natural gas, biomass combustion, and industrial waste heat.

  • Prioritizing upstream waste heat significantly reduces operational costs (OPEX).

III. Pelleting and Packaging System (Optional)

• Dried RDF can be pressed into pellets or briquettes for easier transportation and feeding.

• Equipped with automated packaging lines for bagged or bulk output.

IV. Environmental and Control Systems

• Equipped with dust collection, deodorization, and tail gas treatment systems (e.g., bag filters, spray towers).

• The entire line implements PLC automated control to ensure operational stability and safety.

Conclusion In the context of energy conservation and emission reduction, this equipment system is increasingly vital—particularly in cement plants where it serves as a coal substitute to achieve carbon reduction. Furthermore, its economic viability is gaining widespread attention; the Return on Investment (ROI) period typically depends on local waste composition, energy prices, and government subsidies.