300MW CFB锅炉的运行控制

Operational Control of 300 MW CFB Boilers

法国ALSTOM鲁奇(Lurgi)型大型CFB锅炉的结构特点是采用裤衩形双布风板结构,左、右各2台高温绝热旋风分离器、4个回料阀及4个外置式换热器。提出应注意合理的燃料粒度,维持床压平衡,把握外置床的投运时机。分析了大型CFB锅炉控制对象的特点,以及汽压、汽温、燃烧、床温及水位等的控制情况。

The CFB boiler of Alstom Lurgi Company is of the breeches pipe type dual air-distributors structure, equipped with 2 high-temperature heat-insulated cyclone separators, 4 material-returning valves and 4 external heat exchangers, at both left and right sides. For reliable operation of the boiler, noticeable items that should be cared are to keep suitable fuel particle size, balance the bed pressure and control the very moment when to put the external bed into operation. An analysis is being made to the control objects of large CFB boilers, together with a description to the control way for boiler load, steam pressure and temperature, combustion, bed temperature and water level etc.