Abstract: Promoting the efficient and clean utilization of densified biomass fuel is an important measure to the implementation of the rural revitalization strategy and the promotion of clean heating in rural areas of Northern China. Designing applicable standards for household biomass heating stoves is the key factor to ensure the benign development of this technology. This paper analyzed the actual situation of domestic biomass stove emission standards by taking five common fuels (three types of pellets and two types of coals) as examples. Based on the industrial analysis results, both quantity of air required for complete combustion and the theoretical flue gas emissions were calculated. The results show that the air required for complete combustion and the theoretical flue gas emissions from biomass pellets were significantly less than coal due to biomass itself containing more oxygen element. Therefore it is unreasonable to directly adopt the benchmark oxygen content of coal-fired stove for biomass stove emission standard. Based on the current technical level of domestic biomass stoves and relevant emission standards abroad, it is suggested that the reasonable pollutant emission concentration of domestic household biomass stoves should be converted into oxygen content from 9% to 13%-15%.

Key words: household biomass heating stove, clean heating, pollutant emission, baseline oxygen content