Six JWZL-688 Mills in Zhejiang — 150,000 t/yr Forestry Waste

Project Summary

A Zhejiang-based operator commissioned six Kingwood JWZL-688 vertical biomass pellet mills to establish a multi-line biomass fuel production facility processing local forestry waste. The project transcript indicates the installation is designed to handle approximately 150,000 tonnes of forestry residue annually, converting material that would otherwise represent a disposal burden into biomass fuel pellets with consistent heat value and quality.

Forestry waste — branches, wood off-cuts, and processing residues — is an abundant but logistically challenging feedstock. Its variable moisture content and particle size distribution require upstream preparation equipment and a pellet mill capable of stable output under variable feed conditions. The JWZL-688’s design for synchronized multi-mill operation addresses both the throughput target and the operational resilience that industrial buyers typically require: if one unit enters a maintenance cycle, remaining mills sustain partial output rather than halting the line entirely.

This type of parallel-mill architecture is increasingly common in industrial biomass pellet production as operators seek to avoid single points of failure. For procurement engineers evaluating plant design, the approach trades some capital-cost efficiency for meaningful uptime improvement over a multi-year operating horizon.

Equipment and Capacity

The core equipment deployed is six units of the Kingwood JWZL-688 vertical biomass pellet mill, Kingwood’s established mid-range ring die pellet mill rated at 2–2.3 t/h per unit. Running six units in synchronized operation, the combined rated throughput is approximately 12–13.8 t/h, which aligns with the transcript’s stated annual target of 150,000 tonnes per year when calculated against typical industrial operating hours.

Key equipment characteristics relevant to this deployment:

• Model: JWZL-688 vertical biomass pellet mill (ring die configuration)
• Per-unit rated capacity: 2–2.3 t/h
• Units deployed: 6 (multi-line synchronized operation)
• Combined estimated throughput: ~12–13.8 t/h
• Annual design capacity: ~150,000 t/yr (transcript-stated)
• Feedstock: Forestry waste (local residues)
• Output: Biomass fuel pellets with consistent heat value

Kingwood’s complete wet-feed pellet production lines — which cover crushing, coarse grinding, drying, fine grinding, pelletizing, and packaging in a fully automated, enclosed, dust-controlled configuration — are designed for up to 200,000 tonnes per year. This Zhejiang line operates within that envelope, leaving headroom for capacity expansion without a full equipment redesign.

The transcript confirms Kingwood delivered full commissioning, operator training, and committed lifetime technical support. For industrial operators, post-commissioning support terms are a material procurement consideration: unplanned downtime on a 150,000 t/yr line carries significant revenue impact, and on-call technical response directly affects realized annual output versus nameplate capacity.

IEA Bioenergy Task 40 data indicates global woody biomass pellet production exceeded 30 million tonnes in 2022, with industrial-grade pellets subject to ISO 17225-2 requirements for bulk density and net calorific value. Uniform pellet quality — specifically noted in the transcript as a JWZL-688 design objective — is therefore not a secondary concern but a market-access requirement for operators supplying industrial fuel buyers.

Watch the Project

Footage shows the six JWZL-688 units prepared for shipment to Zhejiang, with commentary confirming the synchronized multi-mill configuration and 150,000 t/yr forestry waste processing target.

Sources

• YouTube video 3sGixzzr9x4 (Kingwood site footage) — capacity figures, feedstock type, unit count, commissioning and support terms
• IEA Bioenergy Task 40 — Sustainable Biomass Supply (2023): global pellet production volumes and ISO 17225-2 quality standards
• ETIP Bioenergy — Feedstock Supply Chains for Advanced Biofuels and Biomass (2023): forestry residue feedstock characterization in Asia-Pacific industrial pellet production