The invention relates to transformation technologies for
denitrification devices of boilers in thermal power plants, in particular to a transformation method for solving the problem of the lower
flue gas temperature of an inlet of a
denitrification device of a boiler in a thermal power
plant, and solves the problem that the SCR (
selective catalytic reduction)
denitrification device cannot run due to the lower
flue gas temperature of the inlet of the SCR denitrification device. The transformation method for solving the problem of the lower
flue gas temperature of the inlet of the denitrification device of the boiler in the thermal power
plant comprises steps as follows: a, collecting data of the thermal power
plant; b, taking the
flue gas temperature of an outlet of an
economizer as a Y-coordinate, taking the
unit load as an X-coordinate, and incorporating the Y-coordinate and the X-coordinate into an
MATLAB (matrix laboratory) coordinate
system; c, additionally mounting a bypass flue between an inlet of a horizontal low-temperature
superheater and the outlet of the
economizer; d, introducing
flue gas temperatures of an outlet of a vertical low-temperature
superheater and
flue gas temperatures of the outlet of the
economizer under different unit loads into a
thermal equilibrium equation; e, testing multiple kinds of fed
coal actually used in the thermal power plant. The method is applicable to transformation of the denitrification device of the boiler in the thermal power plant.