Biomass is an indispensable renewable energy in the future. However

due to relatively high nitrogen content in biomass

a large amount of nitrogen oxides are generated during the combustion process

which cause the environmental pollution. Through analysis on the mechanism of NOx formation and engineering practice

it is found that

during biomass combustion in boilers

the formation and removal process of NOx is greatly influenced by fuel type

combustion temperature and excess air coefficient. The non-catalytic reduction technology is a kind of denitrification technology suitable for biomass boiler

and the type of reducing agent

injection point and injection mode are the key factors affecting denitrification efficiency. By controlling the key point of the denitrification technology

the non-catalytic reduction method can achieve higher efficiency during the denitrification process in biomass boilers. However

to achieve a stable denitrification efficiency

it is necessary to have a good operational control of the boiler.