To better control the temperature difference between the upper and lower walls of the steam drum, should the ignition water level of the steam drum be high or low?
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To better control the temperature difference between the upper and lower walls of the steam drum, should the ignition water level of the steam drum be high or low? Previously, the standard requirement was a drum water level of -100 MM. Is it better to have a higher level or a lower one for easier control?
This post was last edited by zgj2405 on 2011-6-11 09:10. During cold start, after the boiler is ignited, as the number of oil guns increases, the thermal load inside the furnace keeps rising, the temperature of the boiler water increases, and the volume of water expands, causing the water level to rise. At this point, emergency drain or continuous drainage should be used to control the water level; however, the level should not be kept too low – it is better to maintain a slightly higher level, as this helps to prevent excessive temperature differences in the walls of the steam drum.
The key to controlling the temperature difference between the upper and lower walls of the drum is to manage the boiler’s pressure increase rate properly, raising the pressure in strict accordance with the prescribed pressure increase curve； Before starting the furnace and lighting it, the water level in the drum should be kept at its lowest point, as the boiler water expands during the process of increasing pressure, which causes the water level to rise.
The drum liquid level should be controlled at the normal operating value; it is sufficient to manage the rate of pressure and temperature increase properly
The water level should be at normal levels; generally, during the process of increasing temperature and pressure, exhaust to the atmosphere is used for control