When a boiler drum experiences steam-water carryover, some of its phenomena are similar to those of a full water condition in the boiler, such as a sharp drop in superheated steam temperature, water hammer sounds in the main steam pipe, steam leakage from flanges and turbine shaft seals, etc. However, there are two features that can be used for accurate judgment: one is the rapid fluctuation of water level in the water gauge, making it unclear to see the water level, with other water level indicators swinging; the other is a significant increase in salt content in both the boiler water and saturated steam. If determined to be steam-water carryover, the boiler load should be reduced, continuous blowdown valves fully opened, and accident drain valves for the boiler opened. If there are no accident drain valves, the drain valve on the lower manifold of the water wall should be opened, while at the same time strengthening feedwater to improve the quality of the boiler water, paying attention to maintaining normal water level. The desuperheater should be disengaged, and the drain valves for the superheater and main steam pipes opened. Notify the turbine operating personnel to open the drain valves on the main steam pipe on the turbine side, and notify the laboratory personnel to test the quality of the steam and water.
After the above treatment, if the steam-water carryover phenomenon has been eliminated and the steam-water quality is qualified, then normal load can be restored. Strengthening strict chemical supervision of steam-water quality, enhancing water treatment and boiler blowdown, and controlling the salt content in the boiler water within specified standards are effective measures to prevent steam-water carryover.
**Prevention and Handling of Steam-Water Carryover in Bosch Wall-Hung Boilers**
Data Source: Beijing Bosch Wall-Hung Boiler Repair Center
Beijing Bosch Wall-Hung Boiler Repair Phone: [http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3778593](http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3778593)