【Weekly Question for October 1】What are the hazards of excessive drum water level in a circulating fluidized bed boiler?

I think it’s just the fear that the steam will carry water.

When the water level in the drum of a circulating fluidized bed boiler is too high, the vapor space inside the drum becomes smaller or even disappears, which can cause the cyclone separator to be submerged. This affects the efficiency of steam-water separation, leading to an increase in the salt content and humidity of the steam. A large amount of salt can easily cause scaling on the pipe walls and in the flow passages of the turbine, reducing the available flow area. Scaling on the pipe walls can result in overheating of those walls or even pipe rupture； If salt deposits form inside the valve, it can lead to poor sealing of the valve, which in emergency situations can cause serious problems such as turbine overspeed. In cases of severe water filling, the superheated steam temperature drops significantly, resulting in water hammer in the steam pipes and turbines, which causes serious damage to the equipment.

When the water level in the drum of a circulating fluidized bed boiler is too high, the vapor space inside the drum becomes smaller or even disappears, which can cause the cyclone separator to be submerged. This affects the efficiency of steam-water separation, leading to an increase in the salt content and humidity of the steam. A large amount of salt can easily cause scaling on the pipe walls and in the flow passages of the turbine, reducing the available flow area. Scaling on the pipe walls can result in overheating of those walls or even pipe rupture； If salt deposits form inside the valve, it can lead to poor sealing of the valve, which in emergency situations can cause serious problems such as turbine overspeed. In cases of severe water filling, the superheated steam temperature drops significantly, resulting in water hammer in the steam pipes and turbines, which causes serious damage to the equipment.

If the drum water level is too high, the steam space becomes too small, which results in poor steam-water separation and substandard steam quality. Steam carrying liquid damages equipment and instrument components.

What are the hazards of excessive water level in the drum of a circulating fluidized bed boiler? Answer: When the water level in the drum of a circulating fluidized bed boiler is too high, the vapor space inside the drum becomes smaller or even disappears, which can cause the cyclone separator to be submerged. This affects the efficiency of steam-water separation, leading to an increase in the salt content and humidity of the steam. A large amount of salt can accumulate as scale on the pipe walls and in the parts of the turbine where flow occurs, reducing the flow area. Scale formation on the pipe walls can cause overheating of those walls or even lead to pipe rupture； If salt deposits form inside the valve, it can lead to poor sealing of the valve, which in emergency situations can cause serious problems such as turbine overspeed. In cases of severe water filling, the superheated steam temperature drops significantly, resulting in water hammer in the steam pipes and turbines, which causes serious damage to the equipment.

When the water level in the drum of a circulating fluidized bed boiler is too high, the vapor space inside the drum becomes smaller or even disappears, which can cause the cyclone separator to be submerged. This affects the efficiency of steam-water separation, leading to an increase in the salt content and humidity of the steam. A large amount of salt can easily cause scaling on the pipe walls and in the flow passages of the turbine, reducing the available flow area. Scaling on the pipe walls can result in overheating of those walls or even pipe rupture； If salt deposits form inside the valve, it can lead to poor sealing of the valve, which in emergency situations can cause serious problems such as turbine overspeed. In cases of severe water filling, the superheated steam temperature drops significantly, resulting in water hammer in the steam pipes and turbines, which causes serious damage to the equipment.

Not only fluidized beds, but steam boilers as well: an excessively high water level in the drum results in poor quality steam, and steam containing liquid can damage equipment and instruments.

When the water level in the drum of a circulating fluidized bed boiler is too high, the vapor space inside the drum becomes smaller or even disappears, which can cause the cyclone separator to be submerged. This affects the efficiency of steam-water separation, leading to an increase in the salt content and humidity of the steam. A large amount of salt can easily cause scaling on the pipe walls and in the flow passages of the turbine, reducing the available flow area. Scaling on the pipe walls can result in overheating of those walls or even pipe rupture； If salt deposits form inside the valve, it can lead to poor sealing of the valve, which in emergency situations can cause serious problems such as turbine overspeed. In cases of severe water filling, the superheated steam temperature drops significantly, resulting in water hammer in the steam pipes and turbines, which causes serious damage to the equipment.