The main mechanisms of formation and suppression of sulfur oxides during combustion of solid fuels in the CFB and the main regime factors affecting the concentration of sulfur oxides during air combustion are considered. The features of the mechanisms of formation and suppression of sulfur oxide emissions during oxygen combustion, which are largely associated with a high partial pressure of carbon dioxide mixed with oxygen, are shown. A comparative analysis of the effect of capturing SOx and regime factors during the combustion of oxygen and CO2 in air and the environment has been performed. The most preferred mathematical models for calculating SOx emissions are given and the calculation results are compared with experimental data. Directions and approaches to further research are indicated, primarily in the direction of modeling under conditions of co-combustion of coal and biomass. It is shown that it is topical to conduct comprehensive studies of the processes of formation and suppression of harmful emissions from the co-combustion of coal and various types of biomass, especially when burning oxygen in an environment with CO2 recirculation.

The main mechanisms of formation and suppression of sulfur oxides during combustion of solid fuels in the CFB and the main regime factors affecting the concentration of sulfur oxides during air combustion are considered. The features of the mechanisms of formation and suppression of sulfur oxide emissions during oxygen combustion, which are largely associated with a high partial pressure of carbon dioxide mixed with oxygen, are shown. A comparative analysis of the effect of capturing SO and regime factors during the combustion of oxygen and CO in air and the environment has been performed. The most preferred mathematical models for calculating SO emissions are given and the calculation results are compared with experimental data. Directions and approaches to further research are indicated, primarily in the direction of modeling under conditions of co-combustion of coal and biomass. It is shown that it is topical to conduct comprehensive studies of the processes of formation and suppression of harmful emissions from the co-combustion of coal and various types of biomass, especially when burning oxygen in an environment with COrecirculation.

Бухаркина Т.В., Российский химико-технологический университет им. Д.И. Менделеева, Москва Рассмотрены основные механизмы образования и подавления оксидов серы при сжигании твёрдых топлив в ЦКС и основные режимные факторы, влияющие на концентрацию оксидов серы при воздушном сжигании. Показаны особенности механизмов образования и подавления выбросов оксидов серы при кислородном сжигании, которые во многом связаны с высоким парциальным давлением двуокиси углерода в смеси с кислородом. Выполнен сравнительный анализ влияния улавливания SO и режимных факторов при сжигании в воздушной среде и среде кислорода и СО. Приведены наиболее предпочтительные математические модели для расчёта выбросов SO и дано сравнение результатов расчёта с экспериментальными данными. Указаны направления и подходы к дальнейшим исследованиям, прежде всего в направлении моделирования в условиях совместного сжигания угля и биомассы. Показано, что актуальным является проведение комплексных исследований процессов образования и подавления вредных выбросов при совместном сжигании углей и различных видов биомассы, в особенности при сжигании в среде кислорода с рециркуляцией СО.

№8(1057) (2019)