The boiler is carried out firing from cold condition to normal working pressure condition to avoid thermal stress
.
1) Check the boiler blow down valve in close position.
2) Shut the main steam stop v/v.
3) Open the air vent cocks.
4) Open the feed check valve and pumping up to ¼ of gauge glass level.
5) Start the force draft fan with dampers, open correctly to purge the furnace and combustion space of any foul gas.
6) Light the burner after closing the recirculating valve.
7) Normally allow the fire to burn for 5-minutes and stop for 30 mins. This step continues until steam come out.
8) When steam coming out from the air vent close the air vent.
9) Rise up the working pressure step by step slowly. (Allow the fire to burn for 30 mins and stop the fire for 10 min.)
10) When the steam pressure reached Is working pressure drain the steam line. (to avoid water hammer)
11) Main steam stop valve open slowly (crack opening)
.
1) Check the boiler blow down valve in close position.
2) Shut the main steam stop v/v.
3) Open the air vent cocks.
4) Open the feed check valve and pumping up to ¼ of gauge glass level.
5) Start the force draft fan with dampers, open correctly to purge the furnace and combustion space of any foul gas.
6) Light the burner after closing the recirculating valve.
7) Normally allow the fire to burn for 5-minutes and stop for 30 mins. This step continues until steam come out.
8) When steam coming out from the air vent close the air vent.
9) Rise up the working pressure step by step slowly. (Allow the fire to burn for 30 mins and stop the fire for 10 min.)
10) When the steam pressure reached Is working pressure drain the steam line. (to avoid water hammer)
11) Main steam stop valve open slowly (crack opening)
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