A method and system for enhancing the calorific value of biomass pellet fuel

By monitoring the surface reflectivity of biomass pellets with a near-infrared spectrometer, a predictive model for the evolution of microcracks was constructed. The cooling wind speed was dynamically controlled, which solved the problem of microcrack propagation during the cooling process of biomass pellet fuel, achieving an increase in calorific value and a reduction in breakage rate, thereby improving combustion stability and calorific value consistency.

CN122107697BActive Publication Date: 2026-06-30GUANGZHOU JINYE ENERGY SAVING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU JINYE ENERGY SAVING TECH CO LTD
Filing Date
2026-04-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing biomass pellet fuel cooling processes fail to effectively consider the differences in composition, density, and internal stress state of different batches of raw materials, resulting in rapid expansion of surface microcracks, leading to high breakage rate, low combustion stability and calorific value release efficiency, and poor calorific value consistency.

Method used

Near-infrared spectrometers were used to continuously collect the reflectance of biomass particles in both 940nm and 1200nm bands. The decay rate of the reflectance ratio of the two bands was calculated, a predictive model for the evolution of microcracks was constructed, and cooling wind speed was dynamically matched with graded control commands to achieve multi-level cooling wind speed control.

Benefits of technology

It significantly reduced the breakage rate, improved the uniformity of calorific value and combustion stability. The breakage rate decreased from 12.6% to 7.8%, the calorific value increased from 16.8 MJ/kg to 17.5 MJ/kg, and the standard deviation of calorific value decreased from 0.35 MJ/kg to 0.12 MJ/kg.

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Abstract

This disclosure provides a method and system for enhancing the calorific value of biomass pellet fuel. The method includes: continuously acquiring reflectance data of the biomass pellet surface in both 940nm and 1200nm wavelengths using a near-infrared spectrometer to obtain temporal variation data of reflectance; calculating the decay rate of the reflectance ratio in both wavelengths based on the temporal variation data to obtain a predicted result of the microcrack evolution degree of the corresponding batch of biomass pellets; matching and triggering a wind speed graded control command for the corresponding cooling section of the batch of biomass pellets according to the predicted microcrack evolution degree; and completing the cooling and shaping of the biomass pellets under the cooling wind speed matched by the wind speed graded control command. The solution of this disclosure can solve the problems of excessive breakage rate caused by rapid cooling stress and uneven calorific value between different batches.
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Citation Information

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