Boiler Explosion
Boiler Explosion
(OP)
ONE 45 TONS/HR SPREADER STOKER FIRED BOILER HAD AN EXPLOSION WITH A BIG NOISE CAUSING FURNACE WATER WALL DAMAGE.
DETAILS ARE AS BELOW:
BOILER PARAMETERS 45 TONS/HOUR; 65 KG/CM2; 490 C
FUEL - EUCALYPTUS BARK.
TYPE – BALANCE DRAFT (-5mm) WITH TRAVELLING GRATE
AUTO CONTROLS – 3 ELEMENT FEED WATER CONTROL, STEAM TEMPERATURE CONTROL, COMBUSTION CONTROL, FURNACE DRAFT CONTROL
CONTROL SYSTEM – DCS
IT IS UNDERSTOOD FROM LOG SHEETS AND OPERATORS THAT DURING THE PERIOD OF EXPLOSION:
FUEL FEEDING WAS MANUAL AND ALSO EXCESSIVE FUEL FEEDING WAS DONE
FURNACE PRESSURE WAS CONTNUOULY POSITIVE TO THE EXTENT OF +5mm
ANALYER INDICATES HIGH OXYGEN CONTENT IN FLUE GAS (MAY BE INSTRUMENT ERROR)
THE FORUM CAN EVALUATE/DISCUSS THE ABOVE PROBLEM ON:
WHAT COULD BE THE REASON FOR THIS EXPLOSION IN A STOKER FIRED
BOILER WITH BARK FIRING?.
WHAT ARE REMEDIES/PRECAUTIONS TO BE TAKEN TO AVOID FUTURE OCCURRENCE OF THIS KIND OF EXPLOSION?
DETAILS ARE AS BELOW:
BOILER PARAMETERS 45 TONS/HOUR; 65 KG/CM2; 490 C
FUEL - EUCALYPTUS BARK.
TYPE – BALANCE DRAFT (-5mm) WITH TRAVELLING GRATE
AUTO CONTROLS – 3 ELEMENT FEED WATER CONTROL, STEAM TEMPERATURE CONTROL, COMBUSTION CONTROL, FURNACE DRAFT CONTROL
CONTROL SYSTEM – DCS
IT IS UNDERSTOOD FROM LOG SHEETS AND OPERATORS THAT DURING THE PERIOD OF EXPLOSION:
FUEL FEEDING WAS MANUAL AND ALSO EXCESSIVE FUEL FEEDING WAS DONE
FURNACE PRESSURE WAS CONTNUOULY POSITIVE TO THE EXTENT OF +5mm
ANALYER INDICATES HIGH OXYGEN CONTENT IN FLUE GAS (MAY BE INSTRUMENT ERROR)
THE FORUM CAN EVALUATE/DISCUSS THE ABOVE PROBLEM ON:
WHAT COULD BE THE REASON FOR THIS EXPLOSION IN A STOKER FIRED
BOILER WITH BARK FIRING?.
WHAT ARE REMEDIES/PRECAUTIONS TO BE TAKEN TO AVOID FUTURE OCCURRENCE OF THIS KIND OF EXPLOSION?





RE: Boiler Explosion
Regards,
athomas236
ps
It might also be worth while turning the caps lock off
RE: Boiler Explosion
RE: Boiler Explosion
I was wondering the same thing. Was it a tube rupture event or did unburned offgas from the eucaliptus feed material build up and then explode? That would be helpful becuase it could just be tube overheating or tube thinning.
How old is the boiler? That might also lead us to some conclusion about the problem.
Regards
StoneCold