I. What is SRF?
Solid Recovered Fuel (SRF) is a high-quality, high-calorific-value standardized solid fuel produced through the professional sorting and processing of industrial, commercial, and domestic waste. It is not ordinary waste, but a clean energy carrier that has undergone a rigorous process to remove non-combustible and hazardous substances, homogenizing and granulating the combustible components. It can serve as a highly efficient alternative to traditional fossil fuels (such as coal and petroleum coke) and is widely used in facilities such as cement kilns, power plants, and industrial boilers.
II. The Core Value of Solid Recovered Fuel
The core of SRF(Solid Recovered Fuel ) technology lies in upgrading the waste management model to a “resource and energy recovery” model. It not only significantly reduces landfill volume and environmental pollution but also transforms waste into stable industrial energy, achieving carbon emission reduction and resource recycling. It is a key link in the construction of a circular economy and “zero-waste cities.”
III. Standardized Management Process of SRF
An efficient and precise SRF preparation and management process is crucial to ensuring stable fuel quality and meeting customer requirements. This process typically includes the following core stages:
1. Raw Material Receiving and Pre-treatment
Sources: Primarily from industrial and commercial (C&I waste), discarded furniture, and some sorted household waste.
Preliminary Treatment: Large items are crushed and pre-screened in a closed workshop to prepare for subsequent fine sorting.
2. High-Efficiency Crushing and Homogenization
Using a heavy-duty twin-shaft shear crusher or coarse crusher, the complex and varied materials are crushed into smaller, more uniform pieces, releasing different components for easier subsequent sorting.
3. Intelligent Multi-Stage Sorting and Impurity Removal
Magnetic Separation: High-powered magnetic separators separate ferrous metals for recycling.
Air Separation: Utilizing aerodynamic principles, lightweight plastics and paper (high-calorific-value materials) are separated from heavy materials.
Bounce Screen/Screening: Fine-particle inert materials (such as glass, sand, and organic debris) are separated.
Eddy Current Separation: Highly efficient separation of non-ferrous metals (such as aluminum and copper) for high-value recycling.
Optical Sorting/Near-Infrared Sorting (NIR): Intelligently identifies and separates different types of plastics (such as PET, PP, PE) or removes specific impurities, greatly improving the purity and calorific value stability of SRF.
Manual Sorting Platform: Serves as the final quality control, removing irregularly shaped and large impurities.
4. Fine Crushing and Molding:
The sorted high-quality combustible materials (mainly plastics, paper, wood, textiles, etc.) undergo secondary fine crushing to achieve the target particle size (typically 20-50mm).
According to customer needs, it can be pressed into RDF/SRF granules or rods using a molding machine for easy transportation, storage, and stable measurement.
5. Quality Inspection and Storage:
Sampling and testing of the finished SRF are conducted, with key indicators including: calorific value, chlorine content, mercury content, moisture, ash content, etc., to ensure compliance with international standards such as EU EN 15359:2021 or customer-agreement standards.
IV. Significant Advantages of Advanced SRF Preparation Equipment
As a professional manufacturer of waste sorting and management equipment, Guoxin Machinery deeply understands that stable and efficient equipment is the cornerstone of successful SRF project operation. Modern SRF production line equipment possesses the following core advantages:
1. High Purity and High Yield: Through a combination of multi-stage sorting technologies, combustible materials are maximized for extraction while deeply removing metals, inert substances, and hazardous materials, ensuring a high and stable SRF calorific value (typically above 20-25 MJ/kg), meeting the stringent requirements of industrial users.
2. High Degree of Automation and Intelligence: Utilizing a PLC central control system, intelligent sensing, and optical sorting technology, the entire process is visualized and monitored for automated operation, significantly reducing reliance on manual labor and improving sorting accuracy and capacity.
3. Superior Reliability and Durability: Addressing the complex composition and corrosive nature of waste, key equipment utilizes high-strength wear-resistant steel and corrosion-resistant design, ensuring continuous and stable production line operation and reducing downtime, maintenance time,e and lifecycle costs.
4. Flexible Modular Design: Customized modular solutions can be provided based on raw material characteristics, production capacity requirements (e.g., annual processing capacity of 50,000-500,000 tons), and finished product standards, resulting in more economical investment and operation.
5. Environmentally Friendly and Safe Production: The entire process is conducted in a negative-pressure or closed environment, equipped with efficient dust and odor removal systems to effectively control dust and odors, improve the working environment, and comply with environmental regulations.
SRF (Solid Recovered Fuel) is not only an effective way to solve the “garbage siege” dilemma, but also a strategic industry for converting waste into green energy. Investing in a technologically advanced and stable SRF production line means mastering the core capability to transform environmental responsibility into economic benefits.
As a professional equipment and solutions provider, we are committed to providing customers with comprehensive support from process design and core equipment supply to installation and commissioning, working together to promote the resource utilization of waste and create a sustainable future. For more information, please contact Eve: eve@guoxinmachinery.com