Experience of Burning Sunflower Husks in the Kumertau CHP Pulverized Coal-Fired Boilers

The thermogravimetric study of the sunflower husk pellets combustion was carried out at three heating rates: 5, 10, and 20 °C/min to increase the efficiency of agricultural waste disposal methods. The husk combustion process can be divided into several stages: the stage of moisture evaporation and the release of light fractions of volatile substances, the main stage of the release of volatiles and combustion, as well as the stage of the carbonaceous residue after-burning. The maximum mass loss was observed in the experiment with a heating rate of 10 °C/min, and it was equal to 91.99% of the total weight of organic matter. The average residual mass for all experiments was 3%. The higher heating value (HHV) of sunflower husk pellets was 19.2 MJ/kg. When implementing a biomass boiler with a capacity of 430 kW, the return period will be 3.43 years.

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An experimental study of sunflower husk pellets combustion

Islamova

Karaeva

Timofeeva

et al. 2021

BIO Web Conf.

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Application a solid fuel mixture based on Bolshesyrsky lignite and birch wood waste in power plants

Zhuikov

Matyushenko

Stepanov³

2023

jour

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In this paper, we investigate the possibility of using a solid fuel mixture based on lignite from the Bolshesyrsky coal mine and birch wood waste in power plants, taking synergistic interactions between the mixture components into account. Simultaneous thermal analysis was used to determine the main combustion characteristics of lignite, biomass and their mixtures. Non-isothermal heating was performed at a rate of 20°C/min across the temperature range of 25–800°C under the air flow of 50 ml/min. The sample weight was about 6 mg. Proximate and elemental analyses of lignite and biomass samples were performed according to conventional methods. The advantages and disadvantages of converting power plants operated on solid fossil fuels to a solid fuel mixture of lignite and biomass are discussed. The main combustion characteristics of lignite, biomass and their mixtures were defined. The ignition temperature of the coke residue and biomass was found to comprise 365 and 299°C, respectively. The temperature of combustion completion for lignite and biomass was 551 and 464°C, respectively. In comparison with lignite, biomass burns at lower temperatures due to the high content of volatile substances. The addition of biomass to lignite was found to reduce both the ignition temperature of the coke residue and that of combustion completion. An analysis of the combustion process of volatile substances and coke residue established the presence of both positive and negative synergistic interactions between lignite and biomass particles, affecting the maximum combustion rate and the mixture reactivity. The results obtained can be applied when designing power plants operated on solid fuel mixtures of lignite and biomass.

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Experience of Burning Sunflower Husks in the Kumertau CHP Pulverized Coal-Fired Boilers

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An experimental study of sunflower husk pellets combustion

An experimental study of sunflower husk pellets combustion

Application a solid fuel mixture based on Bolshesyrsky lignite and birch wood waste in power plants

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