针对贫煤锅炉低负荷稳燃困难、灵活性差的问题，以350 MW超临界贫煤锅炉为对象，进行烟花动力场试验和灵活性调峰优化调整。优化后，锅炉在不投油情况下的最低负荷可降至35%最大连续蒸发量（BMCR），炉内燃烧良好，燃烧器火检无闪烁，炉膛压力稳定；水动力稳定安全，垂直水冷壁相邻测点壁温差小于10 ℃；脱硝入口烟温351 ℃，炉膛出口烟温608 ℃，环保参数优良，调峰经济性良好，优化效果显著。

Aiming at the problems of difficult lowload stable combustion and poor flexibility of lean coal boilers, a 350MW supercritical lean coal boiler is used as the object to conduct the fireworks dynamic field tests and the flexible peak regulation optimization. After optimization, the minimum load of the boiler without oil input is reduced to 35% boiler maximum continuous rating (BMCR),the combustion in the furnace is good,the fire detection of combustor does not flicker,and the furnace pressure is stable.The hydrodynamics are stable and safe,and the temperature difference between the adjacent measuring points of the vertical water wall is less than 10 ℃.The flue gas temperature at the denitration inlet is 351 ℃, and the flue gas temperature at the furnace outlet is 608 ℃.The environmental protection parameters are excellent, the economy of peak regulation is good, and the optimization effect is remarkable.

TK221