Flue gas desulfurization and denitrification system

The utility model relates to the field of thermoelectricity. The utility model relates to a desulfurization and denitrification system for flue gas. The desulfurization and denitrification tower comprises a desulfurization and denitrification tower body provided with a tray, wherein the desulfurization and denitrification tower body comprises a shell; the tray is axially fixed and circumferentially and rotationally connected to the shell. A driving assembly used for driving the tray to rotate is installed on the shell. A flushing device used for flushing the tray is further installed on the shell and comprises a water inlet pipe installed on the shell and arranged in the width direction of the shell, a water suction pump installed on the water inlet pipe, a plurality of branch pipes communicated with the water inlet pipe and provided with outlets facing the tray, and a dispersing mechanism installed on the shell and used for dispersing liquid flowing out of the branch pipes. The blockage rate of the tray is r