A 670 MW four-corner tangential boiler is taken as the research object

with method of numerical simulation

studying the effect of biomass gas injection location on combustion process and NOxemissions. The results show that biomass gas replaces the pulverized coal fuel of the first layer primary air nozzle with better NOxemission reduction than the replacement of the second layer. Numerical simulation study on reburning with biomass gas. Compared with the previous simulation data

the effect of biomass gas reburning to reduce NOxemissions is very obvious

from the original 612 mg/Nm3 can be reduced to 402 mg/Nm3

approximately 34% reduction. Seeding the same biomass into the furnace in order to compare the difference between biomass gas and biomass

studies have shown that NOxemissions are lower under biomass gas combustion conditions. The research methods and conclusions of this paper have certain realistic reference significance for the research and application of biomass gas and coal blending utilization in large coal-fired boilers.