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Boiler Combustion (Simplified) Coal Fired MODEL LOCOMOTIVES
HEAT INTO POWER ,[object Object],[object Object]
Solid Fuel (Coal)
Anthracite ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dry Welsh steam coal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Bituminous   ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Effects of impurities in Coal ,[object Object],[object Object],[object Object],[object Object],[object Object]
COMPOSITION  of AIR ,[object Object],[object Object]
Primary Air Secondary Air Primary Air Fire Box Air intake in fire box Blast nozzle  blower ring
Three stages of combustion ,[object Object],[object Object],[object Object],[object Object],[object Object]
Units of heat  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Primary Air  Below the fire bed ,[object Object],[object Object],[object Object]
Secondary Air  Above the fire bed ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hydrocarbons 1200 Âș Carbon Dioxide Carbon Monoxide Damper Lever Front damper Rear damper Ash Air Oxygen and Nitrogen  At  60 Âș F Carbon Dioxide  Water Vapour  Nitrogen 2000 ÂșF Ash pan Air Oxygen and Nitrogen 700 ÂșF Blast Nozzle  Blower Ring Coal -   Carbon  -  Hydrogen + Ash Complete combustion of the coal at high temperatures upwards of 2000 ÂșF Gasses cool down on passage through tubes EXOTHERMIC REACTION Fire hole door partially open Incandescent fire bed
Incomplete combustion showing miss management of the fire Air- Oxygen and Nitrogen at 60 ÂșF Fire hole door fully open Holes in the fire bed Drop in fire box temperature Uneven thick fire bed Heat losses up to 70 % Clinker  grate area reduced impeding draft
Deflector plate Stainless steel arch Promotes combustion absorbs  the heat from the volatile gasses before being discharged  reduces temperature drop Directs the path of air Other  uses' of absorbing heat  Volatile gasses
Combustion chamber Shortened tube length improved heat transfer Volatile gases Combustion chamber Larger heating service

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Boiler combustion

  • 1. Boiler Combustion (Simplified) Coal Fired MODEL LOCOMOTIVES
  • 2.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Primary Air Secondary Air Primary Air Fire Box Air intake in fire box Blast nozzle blower ring
  • 10.
  • 11.
  • 12.
  • 13.
  • 14. Hydrocarbons 1200 Âș Carbon Dioxide Carbon Monoxide Damper Lever Front damper Rear damper Ash Air Oxygen and Nitrogen At 60 Âș F Carbon Dioxide Water Vapour Nitrogen 2000 ÂșF Ash pan Air Oxygen and Nitrogen 700 ÂșF Blast Nozzle Blower Ring Coal - Carbon - Hydrogen + Ash Complete combustion of the coal at high temperatures upwards of 2000 ÂșF Gasses cool down on passage through tubes EXOTHERMIC REACTION Fire hole door partially open Incandescent fire bed
  • 15. Incomplete combustion showing miss management of the fire Air- Oxygen and Nitrogen at 60 ÂșF Fire hole door fully open Holes in the fire bed Drop in fire box temperature Uneven thick fire bed Heat losses up to 70 % Clinker grate area reduced impeding draft
  • 16. Deflector plate Stainless steel arch Promotes combustion absorbs the heat from the volatile gasses before being discharged reduces temperature drop Directs the path of air Other uses' of absorbing heat Volatile gasses
  • 17. Combustion chamber Shortened tube length improved heat transfer Volatile gases Combustion chamber Larger heating service