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Emissions and deposit properties from combustion of wood pellet with magnesium additives

燃料化学学报 2013年第5期41卷 530-539页

作者： Tomas Persson Jochen Riedel Jonas Berghel Ulf Bexell Kaung Myat Win School of Technology and Business Studies Dalarna University Department of Energy Environmental and Building TechnologyKarlstad University

This work studies the amount of gaseous and particle emissions and deposits on heat exchanger surfaces in a boiler firedwith commercially available pellets and with pellets primed with magnesium oxide and magnesium *** combustionexperiments were performed on a residential boiler of 20 *** placed in the heat exchanger was analysed with SEM-EDX-mapping to evaluate the chemical composition of the *** results show that particle emissions(PM 2.5)using the additivesincreased by about 50%and the mass of the deposits in the flue gas heat exchanger(excluding loose fly ash)increased by about25%compared to the combustion of pellets without *** amount of additives was found to be eight times higher than theamount of the main alkali metals potassium(K)and sodium(Na)which leads to the assumption that the additives were overdosedand therefore caused the problems *** SEM analysis of the substrates placed in the flue gas heat exchanger indicate that thedeposits of sodium(Na),potassium(K),chlorine(Cl)and sulphur(S)decrease using the *** this was due to theexpected chemical reactions or due to the loose fly ash covering the substrates after the test,could not be determined in this study.

关键词： softwood pellets magnesium additives particle emissions deposit formation

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Energy recovery of solid waste disposal in Russia,State of the Art and operation experience

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Waste Disposal and Sustainable Energy 2020年第4期2卷 265-273页

作者： Georgy Ryabov Andrey Tugov All-Russia Thermal Engineering Institute MoscowRussia

For Russia,there is no alternative way of a civilized solution to the problem of municipal solid wastes(MSW):through combustion(energy utilization)to complex *** government of the Russian Federation in 2017 adopted some decisions aimed at thermal processing of *** order defines the construction of renewable energy facilities on the basis of MSW with a total electric capacity of 280 MW in Moscow region and one object with an electric capacity of 55 MW in the Republic of *** Russia,only three plants where the energy potential of MSW is converted into electricity were *** results of the operation experience of fluidized bed furnaces for MSW incineration at Rudnevo plant in Russia are *** main problems were connected with ash properties,deposit formation,and corrosion of superheater ***,the data of mathematical modeling of dynamic behavior near gas burners,chemical composition and material balance of solids,and the influence of secondary air injection on NOx formation are given.A special test rig was designed for the investigation of the corrosion ***,the main corrosion factors(temperature of the tube surface,rates of O_(2),HCl,SO_(2),and H_(2)O in flue gas,contains chloride and alkali metals in deposits)were found during the *** of energy recovery from waste incineration of pulp and paper mill plants is *** attention is paid to improv-ing the efficiency of waste incineration and bed particle *** experiments were carried out to optimize the bed drain flow *** influence of secondary air supply improvement on mixing with the main flow and boiler efficiency is ***-empirical three-zone method of engineering heat calculations for fluidized bed furnaces of biomass boilers was proposed to predict both the value of outlet furnace temperature and the value of fluidized bed *** method based on empirical values and relationships of the share of heat releas

关键词： Solid wastes Energy recovery Fluidized bed Agglomeration deposit formation Corrosion Heat and mass balance

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