Auxiliary heat supplementing device for flue gas denitrification of grate-fired furnace

The utility model discloses an auxiliary heat supplementing device for flue gas denitrification of a grate-fired furnace. The device comprises a discharge flue, a guide plate and a threaded sleeve, amounting interlayer is arranged on the left side of the discharge flue; a heater is arranged below the mounting interlayer; a positioning rod is arranged at the front end of the heater; a mounting stop block is arranged below the heat conduction plate; the flow guide plate is located below the temperature detector, a supporting rod is arranged on the left side of the heating plate, an air channelis arranged below the flow guide fan, the threaded sleeve is located on the left side of the outer wall of the chimney, a limiting ring is arranged below the threaded ring, and a heat conduction rod is arranged below the heat insulation water layer. Compared with an existing common auxiliary heat supplementing device, the auxiliary heat supplementing device for grate-fired furnace flue gas denitration has the advantages th