我厂四台BG—921(SZP—10/13)型锅炉,1978年以来,由于安装了锅炉给水自动调节器和电动、汽动两套高、低水位报警装置,水位变化稳定地控制在水位±50毫米以内。在运行中,仍发生过锅炉缺水、上汽包胀泄事故。最先缺水和经常缺水的部位靠近正常水位的对流管胀口,且多集中在锅筒正 Since 1978, we have installed four sets of BG-921 (SZP-10/13) boilers. Since 1978, due to the installation of boiler water supply automatic regulator and electric and pneumatic two sets of high and low water level alarm devices, the water level change is steadily controlled at the water level Within ± 50 mm. In operation, the boiler water shortage still occurs, the SAIC packet expiration vent accident. The first part of the lack of water and often lack water near the normal level of convection tube bulging mouth, and more concentrated in the drum is