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Superheater, reheater tube blasting accident handling

1 symbol:

1.1 superheated steam pressure, then the steam pressure drop, blasting area exist a clear leakage sound.

1.2 negative pressure of the furnace changed to positive, the flue with no tight area has smoke.

1.3 After blasting, smoke temperature decreased in side and back, second side smoke temperature deviation increased

2 Reason:

2.1 bad steam quality, tube scaling, causing the wall overheating.

2.2 There is a foreign body in the plug, the material is not qualified or the bad welding in installation during repair or disrepair.

2.3 low load when the use of improper cooling water, resulting in water plug, local wall overheating.

2.4 wall withlong-term over-temperature operation, fly ash wear.

3 processing:

3.1 If the blasting is not serious, it can change the sliding operation, reduce the boiler load appropriately to maintain the steam temperature and normal water level, and strengthen the monitoring leak, requesting value is long and apply for shutdown.

3.2 If the blasting is serious and can not maintain the steam pressure, steam temperature and water level, should be emergency shutdown treatment.

3.3 After the shutdown, you can keep a suction fan to maintain negative pressure inside the furnace.