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 87
- Downloads 0
The Condition of Arboriflora of the Gvardejskij Park of Krasnoyarsk
An inventory of green spaces in the Gvardejskij Park of the Sovetskij District of Krasnoyarsk has been carried out. The aim of the work has been to assess the species composition and vital condition of woody and shrubby...
Ecological-Cenotic Structure of the Relict Japanese Pine (Pinus × funebris Kom.) Grove in the Primorski Territory
The condition and ecological-cenotic (parcel) structure of a grove formed by the Japanese pine (Pinus × funebris Kom.) in the Primorski Territory (Ussuri District) are described. Such groves are the residual fragments of...
Combustion Efficiency of Wood Fuel in the Water Boilers KVU-2000
Renewable energy use is one of priority areas of power production development. One of the sources is wood biomass. Utilization of wood biomass in the regions with developed timber industry is a prospective decision in en...
Silvicultural Production as a Basis for Continuity of Forest Management
Currently, the principle of sustainable use of forests is a fundamental direction in the management of natural resources. Solving the problems of sustainable development of forestry in the European North involves ensurin...
Comparative Assessment of Valuation Indicators of Siberian Larch (Larix sibirica) Forest Plantations when Introduction into the Nizhny Novgorod Region
The practice of using Siberian larch in artificial reforestation on the territory of the Nizhny Novgorod region in the forests of the Bogorodsk district is considered. It should be noted that the relevance of the develop...