The utility model relates to a boiler denitration device technical field, and disclose a kind of for the full load denitration device of boiler depth peak shaving, including main
flue, and the one side of main
flue is provided with the mixing
assembly for to
flue gas conveying mixture, and mixing
assembly includes the air inlet
pipe and
processing frame of being arranged in the one side of main flue, and the one end of main flue is provided with extension frame, and extension frame inside is provided with guide slot, and the one end of extension frame is provided with cavity, and the inside of cavity is provided with connecting shaft, and the outside of connecting shaft is provided with fan leaf;Cavity inner wall is provided with temperature sensor, and the outside of main flue is provided with bypass
pipe, and the inside of bypass
pipe is provided with control valve.The utility model is mixed by being contacted fully to high-temperature
flue gas and low-temperature
flue gas, so that the temperature in
flue gas is evenly distributed, improve the consistency of flue gas temperature, ensure catalyst use effect, and it is convenient to detect flue gas temperature and adjust high-temperature flue gas and low-temperature flue gas proportion to make it adapt to catalyst action temperature.