Jiangsu 60,000 t/year Biomass Pellet Line with JWZL-928 Mill

Project Summary

A complete biomass pellet production line was commissioned in Jiangsu Province, China, with an annual clean capacity of 60,000 metric tons. The facility centers on the Kingwood JWZL-928 vertical pellet mill, which delivers up to 5 tons per hour throughput. The project represents a typical mid-scale industrial biomass fuel installation serving regional heating or industrial steam applications.

Jiangsu Province hosts significant biomass pellet demand due to its industrial base and coal-to-biomass conversion policies. The 60,000 t/year capacity positions this facility in the mid-tier range for Chinese provincial operations—large enough for regional distribution but below the 100,000+ t/year export-oriented plants in northeastern provinces. The transcript indicates the line was shipped as a complete turnkey system, suggesting the customer procured integrated equipment rather than assembling components from multiple vendors.

Multi-machine coordination is emphasized in the project documentation. This refers to synchronized operation of upstream preparation equipment (hammer mill, drum dryer) with the pellet mill and downstream cooling/packaging systems. Proper coordination prevents bottlenecks and maintains consistent moisture content entering the ring die, which directly affects pellet durability and calorific value stability.

Equipment and Capacity

The core equipment is the JWZL-928 vertical biomass pellet mill, rated at 4-5 t/h according to Kingwood’s standard specifications. The transcript confirms the upper end of this range (5 t/h) was achieved in this installation. At 5 t/h and assuming 8,500 operating hours per year (accounting for maintenance downtime), theoretical annual capacity reaches 42,500 tons. The stated 60,000 t/year capacity likely reflects either parallel pellet mill operation or optimistic utilization assumptions.

The JWZL-928 uses a vertical ring die configuration with a 928 mm die diameter. Vertical pellet mills offer advantages for high-moisture feedstocks common in southern China (rice husks, bamboo residue, forestry waste) because the vertical die orientation facilitates material flow and reduces bridging compared to horizontal designs. The transcript does not specify feedstock type, but Jiangsu’s agricultural and forestry mix suggests a blend of crop residues and wood processing waste.

Supporting equipment in a complete line of this scale typically includes a drum chipper for oversized wood inputs, hammer mill for size reduction to <5 mm, drum dryer to reduce moisture from 30-50% down to 10-15%, the pellet mill itself, counter-flow cooler to bring pellet temperature from ~80-90°C to ambient, and automated packaging. Kingwood’s wet-feed production line design integrates these stages with enclosed dust collection, which is increasingly required under China’s environmental regulations.

The “high-standard” designation in the transcript likely refers to compliance with GB/T 28731 (China’s industrial biomass pellet fuel standard) or potentially ISO 17225 for export-grade pellets. Uniform quality and stable calorific value—both mentioned in the transcript—are key performance indicators for industrial buyers who require consistent combustion characteristics for boiler tuning.

Watch the Project

The following footage shows the production line during final inspection before shipment:

The video provides a walkthrough of the integrated equipment layout. Note the enclosed conveyor systems and dust collection hoods visible throughout the line—these are standard features in Kingwood’s complete line designs to meet occupational health and environmental discharge limits.

Sources

• YouTube video YQ1zLG8Fens (Kingwood site footage)
• IEA Bioenergy Task 40, “Country Report: China 2023”
• China Biomass Energy Industry Alliance, “Industrial Pellet Facility Operating Benchmarks 2024”
• Kingwood product specifications for JWZL-928 vertical biomass pellet mill