For the actual situation of mixed coal combustion in power plant

co-combustion tests of the actual burned lignite coal and bituminous coal in a power plant were conducted on a thermogravimetric analyzer

under conditions with different oxygen concentrations

blending ratios and heating rates.The co-combustion characteristics of the blending coal were analyzed based on test data.The results show that

the changing rules of the mixed coal combustion were the same and the results were joint action of bituminous coal and lignite.With the increasing mixing ratio of lignite

the ignition temperature and burnout temperature of the mixture both reduced

and the comprehensive combustion characteristic index increased.The combustion characteristic curves of the mixture in 20% O_2/80% CO_2 atmosphere was similar to that in 20% O_2/80% N2 atmosphere.In 20% O_2/80% CO_2 atmosphere

the ignition temperature and burnout temperature were about 10 ℃ higher than that in 20% O_2/80% N2 atmosphere.In 30% O_2/70% CO_2 atmosphere

the ignition temperature of the mixed coal was 3℃ higher than that in 20% O_2/80% N_2 atmosphere.When the heating rate increased from 10 ℃/min to 40 ℃/min

all the ignition temperature

burnout temperature and comprehensive combustion characteristic index of the mixed coal increased.