Sintering machine head flue gas desulfurization and denitrification treatment device and treatment method thereof

The invention discloses a sintering machine head flue gas desulfurization and denitrification treatment device and a treatment method thereof. The device comprises a dry desulfurization tower, a bag-type dust collector, a GGH flue gas heat exchanger, a low-temperature catalyst SCR reactor, a variable-frequency fan and a chimney which are sequentially communicated. The GGH flue gas heat exchanger is provided with a first input end, a first output end, a second input end and a second output end. The air outlet end of the bag-type dust collector is communicated with the first input end, the firstoutput end is communicated with the air inlet end of the low-temperature catalyst SCR reactor, the air outlet end of the low-temperature catalyst SCR reactor is communicated with the second input end, and the second output end is communicated with the variable-frequency fan. The dry desulfurization technology and the low-temperature SCR catalyst are combined for use, the stability of the system is improved, excessive con