Embedded flue gas desulfuration device, system and method for medium and low temperature selective catalytic reduction (SCR) denitrification inlet

The invention discloses an embedded flue gas pre-desulfuration device for a medium and low temperature selective catalytic reduction (SCR) denitrification inlet. A rotary catalytic oxidation filler layer and a rotary adsorption layer are arranged horizontally in a circular flue and can rotate relative to the circular flue, and the rotary oxidation filler layer is located below the rotary adsorption layer; a blowing inlet cover is arranged on the upper part of the rotary adsorption layer, a blowing outlet cover is arranged on the lower part of the rotary catalytic oxidation filler layer, a blowing conveying channel is formed between the rotary adsorption layer and the rotary catalytic oxidation filler layer, the blowing conveying channel is provided with a physical partition making flue gasbe isolated from blowing gas, a blowing channel is formed by the blowing inlet cover, the blowing conveying channel and the blowing outlet cover, and the blowing channel is stationary relative to thecircular flue; and partia