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锅炉汽包液位是锅炉正常运行的重要工艺指标,也是安全生产的主要条件.液位过高,由于上部空间减少,影响汽、水分离,蒸汽产生带液现象,还会影响透平机正常运转;液位过低会破坏水循环,影响汽、水平衡,甚至会造成失水事故,烧干锅炉,严重时可能导致锅炉爆炸。因此,国内大中型糖厂的锅炉大都安装液位自动调节装置,以保证锅炉的正常运行。以液位信号去控制给水量的单冲量(单参数)调节系统,只能满足一般中小型锅炉的要求(见图1)。对于负荷变化大、汽包相对容
Boiler drum level is an important indicator of the normal operation of the boiler, but also the main safety conditions. Level is too high, due to the reduction of the upper space, the impact of steam, water separation, steam produce liquid phenomenon, but also affect the turbine normal Running; low liquid level will destroy the water cycle, affecting steam and water balance, and even cause water loss accident, boil the boiler, in severe cases may lead to the boiler explosion. Therefore, the domestic large and medium-sized sugar factory boilers most of the installation of liquid level automatic adjustment device to ensure the normal operation of the boiler. The single-impulse (single-parameter) regulation system that controls the water supply with the level signal can only meet the requirements of the general small and medium-sized boilers (see Figure 1). For the load changes, drum relatively tolerant