According to the problem of coking in the high-temperature reheater area of the four-corner tangential boiler in a certain power plant

it analyzes the causes of coking in detail and carries out combustion optimization adjustment tests

including primary air velocity leveling

pulverized coal fineness adjustment

secondary air adjustment and burnout air adjustment tests.After the unit is ope-rated in the adjusted manner

no obvious coking phenomenon occurred in the boiler.The combustible content of fly ash and slag decrease significantly

and the oxygen deviation on both sides of the operation decrease

ensuring the safe operation of the unit

improving the thermal efficiency of the boiler

and providing a reference for similar units of the same type with similar problems.