Improving the Efficiency of Energy Use of Biofuels
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2023, Vol 1, Issue 1
Abstract
The share of thermal power plants that consume renewable energy resources is growing worldwide. Wood and bio-coal pellets become more and more common as fuels. The technological cycle of pulp and paper production produces a large amount of wood waste, which must be used efficiently. However, bark-wood waste is hard-burning fuel, which causes the need to “light” the flare with high-calorie non-renewable fuel, is followed by the formation of carbon dioxide emitted into the atmosphere. Boilers KM-75-40, taken out of production in 1985, are still used at Russian enterprises for the use of bark-wood fuel as an energy source. Energy examination of the boiler KM-75-40 during its operation with bark-wood fuel (coniferous and deciduous wood bark, substandard chips and sawdust) showed that the design and technical condition of the boiler does not provide the required combustion rate of fuel components and environmental parameters that meet the requirements of the state standard, GOST. The present work aims at analyzing the possibilities of comprehensive improvement of efficiency of bark-wood fuel combustion in boilers KM-75-40. Highriority measures to improve the efficiency of these boilers were developed based on the research results. Boilers KM-75-40 have been in operation for more than 50 years and require replacement with modern low-emission heat generating systems. Prior to replacement, however, upgrading the boilers is recommended: their transition to the layer-vortex combustion technology and the use of biocoal pellets, as an additive to the bark-wood fuel, in order to adjust the thermal characteristics of the combusted biofuel and steam capacity of the boilers. Bio-coal pellets produced from hydrolysis lignin, which has undergone soft pyrolysis, are promising for this purpose. Thermal and aerodynamic calculations of the boiler KM-75-40 with different proportion of pellets by heat release, as well as thermogravimetric studies were carried out to assess the effectiveness of co-combustion of bark-wood fuel and bio-coal pellets. The thermal calculation included: the circulation rate of fuel particles in the vortex zone, the granulometric composition of the combusted fuel mixture, the location features of combustion equipment, reducing the contamination of the heating surface. The transition to the combustion of this fuel mixture using the layer-vortex technology will allow to refuse from using non-renewable fuels in the boiler KM-75-40 when combusting high-moisture bark-wood fuel, will significantly increase the boiler efficiency and reduce the negative impact on the environment. For citation: Lyubov V.K., Tsypnyatov I.I. Improving the Efficiency of Energy Use of Biofuels. Lesnoy Zhurnal = Russian Forestry Journal, 2023, no. 1, pp. 172–185. (In Russ.). https://doi.org/10.37482/0536-1036-2023-1-172-185
Authors and Affiliations
Victor K. Lyubov Northern (Arctic) Federal University named after M. V. Lomonosov https://orcid. org/0000-0001-7050-1212 Ilya I. Tsypnyatov Northern (Arctic) Federal University named after M. V. Lomonosov https://orcid. org/0000-0002-8074-7934
Keywords
Related Articles
- EP ID EP713175
- DOI 10.37482/0536-1036-2023-1-172-185
- Views 100
- Downloads 0
Studying the Rheological Properties of a Polylactide Melt Mixed with Wood Filler
Composite materials based on wood filler are promising materials that are actively conquering the market. This is due to the advantages of using these materials in various fields: weather resistance and environmental com...
A Predictive Model of the Impact of the Skidding System on Forest Soil in Severe Climatic Conditions
In the Russian Federation logging operations are traditionally carried out in winter. This is due to the predominance of areas with swamped and water-logged (class III and IV) soils in the forest fund, where work of fore...
Cultivating Siberian Stone Pine Plantations under Wild Animal Damage Conditions
The research of 26-year-old mixed plantations of Siberian spruce and Siberian stone pine cultivated by biogroups of about 300 pcs/ha (2â5 stone pine seedlings alternating 4â9 spruce seedlings in a row) has shown that...
features of the Structure of Pine Stands on Bolshoy Solovetsky Island
The studies were carried out on Bolshoy Solovetsky Island in the White Sea. The research purpose is to identify the features of pine forests in the most frequent growing conditions on the island. For this purpose, 34 sam...
Forest Resources of the Republic of Ghana
The Republic of Ghana is among the 50 countries in the world with the highest biodiversity of plant and animal species. The network of forest reserves in the country is the basis for the rich biodiversity conservation. O...