Different boiler technologies, Circulating Fluidized Bed (CFB) and Pulverized Coal (PC), impose distinct fuel preparation requirements. Our customized single-shaft shredders are engineered to meet these specific challenges, ensuring reliable feedstock quality and seamless blending.

1. Circulating Fluidized Bed (CFB) Boilers: High-Capacity Processing for Coarse Fractions

CFB boilers offer superior fuel flexibility, typically tolerating biomass particle sizes up to 100 mm without compromising combustion stability. While this tolerance simplifies preparation, operators still face challenges:

· Inconsistent Feedstock: Biomass varies widely in moisture, density, and size.

· Inefficient Processing: Conventional crushers often consume excessive energy or require multi-stage reduction.

· OPEX Concerns: Over-shredding, producing particles smaller than necessary, increases handling and processing costs without added thermal benefit.

The Harden Solution

We provide a high-torque, high-capacity single-shaft shredder specifically configured for CFB applications. A single unit can process up to 200 tons per day, depending on feedstock density and moisture content, reducing raw bales or loose biomass to particles below 100 mm in a single pass. This robust design ensures consistent output suited for the fluidized bed, minimizing downtime and maintenance costs while maximizing ROI for high-ratio co-firing projects.

2. Pulverized Coal (PC) Boilers: Precision Shredding for Fine Fractions

Pulverized coal units are far more sensitive to particle size. To ensure complete burnout and stable co-milling or injection, biomass must typically be reduced to 30 mm or smaller. Inconsistent sizing can lead to slagging, blockage, or reduced DeNOx efficiency. Key challenges include:

· Balancing Fineness and Throughput: Achieving small particle sizes can reduce production capacity.

· Fibrous Material Handling: Straw and agricultural residues tend to wrap around rotors or blind screens.

· Continuous Heavy-Duty Operation: Demanding plant environments require continuous, heavy-duty operation.

The Harden Solution

Harden addresses these strict demands with an advanced single-shaft shredder optimized for fine grinding. Utilizing specialized cutter geometry and precise screen control, our system consistently yields particles smaller than 30 mm under typical operating conditions, with over 95% size compliance. This produces a homogeneous feedstock that integrates seamlessly with coal powder, helping reduce mill blockage and wear while preserving boiler efficiency.

Looking Ahead: Powering the Global Transition

Biomass co-firing is accelerating worldwide. With significant capacity upgrades projected across China and international markets through 2030, the demand for reliable fuel preparation systems is at an all-time high.

Success in co-firing depends on matching your shredding technology to your boiler type. Harden Machinery Ltd. delivers scalable, proven solutions that ensure your project is both operationally sound and economically viable.