In order to study the performance of calcium-based synchronous desulfurization and denitrification agent

it prepares a calcium-based synchronous desulfurization and denitrification agent

and studies the SO2 removal efficiency

NO removal efficiency and synchronous desulfurization and denitrification efficiency with different SO2 components.It enlarges and designs the laboratory device

and builts the industrial device of calcium-based synchronous desulfurization and denitrification of gas-fired boiler flue gas

and carries out the industrial continuous operation test.The results show that NO is not contained in the gas

the SO2 concentration at the inlet is 995～999 mg/m3

and the SO2 concentration at the outlet is reduced to 17～21 mg/m3

which meets the ultra-low emission requirements and the desulfurization efficiency reaches 97.9%～98.3%.When SO2 is not contained in the gas

the mass concentration of NO at the inlet is 148～150 mg/m3

the outlet is reduced to 33～37 mg/m3

which meets the requirement of ultra-low emission

and the denitration efficiency reaches 75.0%～77.6%.When the mass concentration of NO at the inlet is about 150 mg/m3 and the mass concentration of SO2 is about 1000 mg/m3

the desulfurization efficiency is reduced by about half

and the denitrification efficiency is basically unchanged

and the phenomenon of high concentration inhibition exists in the removal of SO2 by NO.The industrial device of calcium based synchronous desulfurization and denitrification of gas-fired boiler flue gas runs continuously for 4000 h

and the mass concentration of NO at the outlet is close to the ultra-low emission limit

and the calcium-based synchronous desulfurization and denitrification agent reach its life cycle.