題組內容

Q2: What's the procedure for a boiler's normal shut-down?
A: For a boiler normal shut-down the suitable procedure is:
1. Carry out soot blowing, if permissible.
2. Change combustion control from automatic to manual.
3. Change fuel supply to diesel oil; shut steam off fuel heaters and trace heating.
4. Close burner supply valves and main fuel shut off valve.
5. Purge boiler furnaces with air for three to five minutes; stop forced draught fan.
6. Close steam stop valves on boiler when pressure is reduced.
7. Drain boiler when it has cooled down or filled with treated water.