JWZL-800 Industrial Biomass Pellet Mill | Kingwood

JWZL-800 Ring Die Pellet Mill: Technical Specifications

The Kingwood JWZL-800 is a heavy-duty ring die biomass pellet mill built for continuous industrial operation. Its 250 kW 8-pole main drive and 3–4 metric ton per hour rated output place it squarely in mid-to-large production line configurations where consistent throughput and low maintenance overhead are non-negotiable.

The pelletizing assembly centers on an 800 mm × 120 mm ring die matched with two 380 mm × 126 mm roller shells. This die-roller geometry balances compression ratio with feedstock throughput, making the JWZL-800 well-suited for processed wood residues, agricultural straw, and comparable biomass streams at moisture content below 15%. The WJ-800 gearbox, lubricated with L-CKC220 gear oil, transmits drive torque with minimal mechanical loss under sustained high-load cycles.

Lubrication is handled by a pneumatic grease injector (model YGP-A), reducing manual intervention and supporting unattended shift operation. Thermal management is provided by a 1.5 kW oil pump circuit connected to an HU50-40-3.0-H plate heat exchanger, maintaining stable operating temperatures across extended production runs. Feedstock delivery is controlled via a BWD2-43-Y3-4P variable frequency reducer, allowing operators to match screw conveyor rate precisely to pelletizing speed.

Parameter	Specification
Main Motor Power	250 kW – 8P
Screw Conveyor Drive	BWD2-43-Y3-4P (variable frequency)
Forced Feeding Motor	2.2 kW
Cooling Oil Pump	1.5 kW
Plate Heat Exchanger	HU50-40-3.0-H
Grease Injector	YGP-A (pneumatic)
Gearbox	WJ-800
Gear Oil	L-CKC220
Ring Die	800 mm × 120 mm
Roller Shell	380 mm × 126 mm × 2
Capacity	3–4 t/h
Dimensions (L×W×H)	3,912 mm × 1,500 mm × 2,703 mm
Weight	11 t
Pellet Formation Rate	≥ 90%
Pellet Pulverization Rate	≤ 10%
Noise Level	≤ 93 dB(A)

Performance Standards and Operating Environment

Two headline performance thresholds govern the JWZL-800’s commercial relevance: a pellet formation rate of ≥90% and a pulverization rate of ≤10%. Both figures directly affect saleable yield per input ton and downstream handling losses during conveying, storage, and combustion loading — cost variables that compound significantly at industrial scale.

Noise output is rated at ≤93 dB(A), consistent with enclosed industrial workshop requirements and standard personnel protection planning. At 11 metric tons machine weight and overall dimensions of 3,912 mm × 1,500 mm × 2,703 mm, the JWZL-800 is designed for fixed-installation production halls rather than mobile or semi-permanent deployments.

The forced feeding motor (2.2 kW) maintains positive feedstock pressure at the die entry zone, reducing bridging and ensuring uniform compression across the die face — a critical factor in achieving consistent pellet density and formation rate at the upper end of the capacity range.

Biomass pellets produced on the JWZL-800 meet fuel quality parameters relevant to industrial boiler applications: calorific value of 4,800 kcal/kg, moisture content below 15%, sulfur content below 0.3%, and ash content below 18%. All emission indicators comply with GB13271-2001, China’s national Emission Standard of Air Pollutants for Boilers. Fuel cost savings versus equivalent fossil fuel inputs typically reach 40–50% under normal operating conditions.

Integration into Kingwood Complete Wet-Feed Production Lines

The JWZL-800 operates as the pelletizing core within Kingwood’s complete wet-feed biomass pellet production lines. These lines process high-moisture raw biomass — wood chips, bark, crop straw, palm shell, and similar feedstocks — through a defined sequential workflow: drum chipping, coarse hammer mill grinding, drum drying, fine grinding, ring die pelletizing, counter-flow cooling, and automated packaging. The entire process runs enclosed with integrated dust removal.

Under Kingwood’s Three-Standardization Framework — Integrated, Dust-Free, and Automated production lines — complete line designs scale to annual capacities of up to 200,000 metric tons. The JWZL-800’s 3–4 t/h output range suits line configurations in the 24,000–35,000 metric ton per year segment, depending on operational hours and feedstock characteristics.

For a documented example of Kingwood complete line performance at commercial scale, see the Vietnam 24 t/h wood chip pellet production line case. A further reference — the Vietnam 12 t/h line achieving 23-month investment payback — illustrates the financial return profile accessible at smaller throughput configurations.

Procurement teams evaluating the JWZL-800 should provide feedstock moisture range, target pellet diameter, and annual throughput requirement when engaging Kingwood’s sales engineering team. This allows accurate model selection against adjacent options in the vertical pellet mill range — including the JWZL-928 at 4–5 t/h and the JWZL-688D at 3–3.5 t/h — or the horizontal JZWH-860 for equivalent throughput in an alternative mill configuration.

Kingwood’s engineering team of 20 R&D specialists brings 27 years of accumulated development experience and has planned and designed over 2,000 production line projects for clients in more than 30 countries. Jiangsu Kingwood Industrial Co., Ltd. is listed on the NEEQ under stock code 871765 and holds ISO 9001, ISO 14001, and CE certifications. Manufacturing and headquarters are located at #568 Hongsheng Road, Liyang Zhongguancun Industrial Park, Liyang City, Jiangsu Province, China.