26. How to handle the unit after the main fan interlock occurs?
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26. How to handle the unit after the main fan interlock occurs?
(1) Contact the control room and dispatch to report the situation； (2) Quickly check whether the high-temperature butterfly valve is closed ； (3) Close the electric gate valve at the host outlet to prevent catalyst backflow ； (4) Check whether the high-temperature gate valve has dropped and whether the outlet check valve is closed tightly ； (5) Shut off the sealing steam and sealing air, and listen to the cooling steam from the wheel disc ； (6) The turbine must be turned manually after shutdown ； (7) Take measures to prevent freezing and condensation in winter.
It seems that the top priority is to shut off or ensure that the outlet valve is closed, in order to prevent backflow of material. For equipment lubricated with thin oil, it is the guarantee of the oil supply system. For reference.
(1) Contact the control room and dispatch to report the situation； (2) Quickly check whether the high-temperature butterfly valve is closed ； (3) Close the electric gate valve at the host outlet to prevent catalyst backflow ； (4) Check whether the high-temperature gate valve has dropped and whether the outlet check valve is closed tightly ； (5) Shut off the sealing steam and sealing air, and listen to the cooling steam from the wheel disc ； (6) The turbine must be turned manually after shutdown ； (7) Take measures to prevent freezing and condensation in winter.