Combustion Efficiency of Wood Fuel in the Water Boilers KVU-2000

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UDС

662.6/9

DOI:

10.37482/0536-1036-2020-1-167-179

Abstract

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 ensuring power independence. Wood biomass usage allows to recover by-products of logging and woodworking industries, generate cheaper electric power and reduce an impact on the environment. The North-West of Russia has huge wood reserves. As a result, the issues of efficient utilization of wood biomass are relevant for the region. An effective way of the complex solution of energetical and ecological problems with provision of heating loads is application of modern devices operating on wood fuel such as modern water boilers. This study aims to analyze heat engineering and environmental performance of the boiler KVU-2000 during the combustion of by-products of timber industry. The components of the boiler’s heat balance and gaseous effluents have been determined. Emissions of particulate matter and the content of soot particles have been studied. The study results have shown that the boiler KVU-2000 provides high economic and environmental performance when operating on polydisperse wood fuel. However, a manual regulation of secondary air flow and absence of the flue gas oxygen control systems do not allow to keep optimum combustion air-blown mode. Absence of resistance control devices for ash collectors and thermal insulation of elements in post-combustion gas path lead to irrational heat losses, which conflicts with normative regulations. A limited operational period between cleaning of heating surfaces of a fire-tube boiler demands strict requirements to capacity redundancy. Elimination of identified flaws will ensure substantial increase of energetic and economic performance of the boilers; allow to minimize the emissions of harmful substances of biofuel burning, and recommend these boilers for application in heat supply systems in the Arctic region.
Acknowledgments: The authors are grateful to D.G. Chukhchin for carrying out the research using the scanning electron microscopy method.

Authors

V.K. Lyubov, Doctor of Engineering, Prof.; ResearcherID:AAF-8949-2019, ORCID: 0000-0001-7050-1212
A.N. Popov, Candidate of Engineering, Assoc. Prof.; ResearcherID: N-5104-2019, ORCID: 0000-0003-0144-1513

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: vk.lubov@mail.ru, a.n.popov@narfu.ru

Keywords

water boiler, wood fuel, harmful substances, furnace, heat losses, efficiency

For citation

Lyubov V.K., Popov A.N. Combustion Efficiency of Wood Fuel in the Water Boilers KVU-2000. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 1, pp. 167–179. DOI: 10.37482/0536-1036-2020-1-167-179

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Received on December 31, 2018