Cost Savings to Operators through Online Boiler Cleaning
Description of Costs
Assumptions Made
Cost for average boiler (13t/h MSW, 40t/h steam)
Total Cost/Saving
Cost of down-time for offline cleaning
4-5 days down time as clean is done during shut-down @ £20,000/day
£80,000-£100,000
£80,000-£100,000
Cost of scaffolding
£2,000
£2,000
Contractors cost for manual cleaning and/or sandblasting
2 days sandblasting team @ £1,000/day
£2,000
£2,000
Disposal cost of sand/debris
If off-line it has to be disposed of at higher cost than the routine disposal of bottom ash; assume 2 tonnes @ £200
£400
£400
Fuel oil cost for start-up
8 hours start-up at 18MW power burners and fuel price 32p/litre
£4,000
£4,000
Estimated cost of on-line boiler clean
Assume standard on-line clean
£10,700
-£10,700
Benefit to Operator
£77,400-£97,400
Notes:
Cleaning online can normally be done in a one-day intervention (set-up and take-down can be the day before/after and doesn’t interfere with the normal plant operations. Ash is normally removed with the bottom ash. The table above is based on reasonable assumptions and current cost estimates.
