When a 600 MW wall-type tangential-fired lignite boiler in a certain power plant is operating at a load of 300 MW

there are significant deviations in the main steam temperature on both sides and in the desuperheating water volume.Through a series of ba-sic tests to research the boiler's operating status

it analyzes the causes of the steam temperature deviation

and summarizes the most effective adjustment strategies and methods under the existing conditions.According to the deviation of the main steam temperature

it conductes tests on the horizontal swing angle of the overfire air and the secondary air offset respectively in response to the main steam temperature deviation.It adjusts the flue gas heat load to be relatively uniform

thereby reducing the main steam temperature deviation and the desuperheating water volume deviation.Based on the test results

it puts forward reasonable suggestions to provide a reference for boilers with similar problems.