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Conservation Of Fuels

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Storage, handling & preparation of fuel oils

  • Avoid oil spillage
  • Prevent oil leakage
  • Drain water from storage tank
  • Clean strainers/filters
  • Maintain the fuel oil at higher temperature in the main storage tank
  • Maintain correct pre-heat temperature

Combustion of fuels oils & burner operation & maintenance

  • The heat generated by combustion of fuel is utilised by boiler or furnace of heating water or air or any process material
  • Combustion effected by a burner which mixes fuel and air in proper proportion
  • Any petroleum is a hydro carbon, sulphur is present in significantly lower percentage
  • Combustion products are primarily carbon dioxide, water vapour and sulphur dioxide which pass thru the chimney along with nitrogen in the air
  • For ideal combustion 14.1 kg of air is required for every kg of fuel for complete combustion. However, in practice since mixing is never perfect certain amount of excess air is needed to complete combustion and ensure release of entire heat contained in fuel oil
  • Too much air will result in additional heat loss, stack loss
  • Less air would lead to incomplete combustion and smoke
  • Hence there should be an optimum excess air level for each type of fuel which will give fuel saving
  • An experienced operator relies on the smoke emitted by the chimney or colour of the flame to help in adjust air at the optimum level. However, a chemical analysis of flue gas is a more objective method that helps in achieving finer air control
  • By measuring carbon dioxide or oxygen in flue gases, it is possible to estimate the percentage of excess air in flue gases
  • Smoke indicates combustion condition
  • Burner selection should be done judiciously
  • Burner should be dismantled and cleaned periodically
  • Replace cracked burner blocks fast

Boiler operations

  • For efficient boiler operation follow correct procedures during start-up, operations, load changes and shut down
  • Steam generation
  • Water level should be at the optimum level
  • Blow down the boiler regularly
  • Water treatment
  • Analyse flue gases
  • Check feed water temperature
  • Steam distribution
  • Check insulation of pipeline, flanges and joints
  • Quality of the steam
  • Check steam traps
  • Prevent sudden boiler load fluctuation

Furnace operations

  • Prevent flame impingement align burners properly
  • Adjust flame length
  • Keep furnace doors closed
  • Close all openings
  • Prevent air infiltration
  • Operate the furnace at a slight positive pressure
  • Maintain correct furnace temperature
  • Load the furnace to rated capacity /recover waste heat

Dg set operation

  • Optimum loading for min bsfc
  • Ensure proper fuel injection
  • Reduce air intake temperature
  • Reduce exhaust heat loss/attempt waste heat recovery
  • Correct lubrication & cooling
  • Turbocharging

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