What is the purpose of opening the omnidirectional exhaust valves during the startup of a circulating fluidized bed boiler?
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What is the purpose of opening the omnidirectional exhaust valves during the startup of a circulating fluidized bed boiler?
Due to the failure to meet the parameter requirements for starting the turbine. The main valve does not open, resulting in low exhaust volume from the boiler; this can lead to an increase in temperature and prevent the speed from keeping up with the rise in pressure. －－－－
The purpose of opening the exhaust valve to the atmosphere during startup is that, when the parameters required for starting the turbine have not been met, the main steam valve has not yet been opened, resulting in a low exhaust volume from the boiler; this can easily cause the steam temperature to rise at a slower rate than the steam pressure. Therefore, it is necessary to use an exhaust method that discharges steam into the atmosphere in order to increase the exhaust volume of the steam system and thus improve the steam parameters. Additionally, increasing the steam discharge volume also helps to enhance the cooling of the heating surfaces in the superheater, preventing localized overheating of the tube walls of these surfaces.
The purpose of opening the omnidirectional exhaust valves during the startup of a circulating fluidized bed boiler is for safety reasons.