How much coal is needed to produce one ton of steam?
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Dear experts, given that the boiler’s thermal efficiency is 85%, the calorific value of coal is 4600 kcal, and the steam pressure is 6–8 kilograms, how can we calculate how many tons of coal are required per ton of steam produced? :hug::hug:
By consulting tables, the enthalpy of steam at pressures of 6 to 8 kilograms is determined; from this, the heat content per ton of steam is calculated. It is then determined how many kilograms of coal are required to produce such an amount of heat (heat losses in the boiler must be taken into account, that is, the boiler’s thermal efficiency is considered).
Based on 7 kilograms, the enthalpy of saturated steam at 7 kilograms is 2771.4. 2771.4*1000/4600*0.85=708.8
Friend on the 3rd floor! Be careful with unit conversions; this won’t work!
It seems like the third floor should be divided by 0.85
(Target steam enthalpy – Boiler feedwater enthalpy) * 1000 / 4.18 / 4600 / 0.85; note the unit conversions, with the enthalpy value assumed to be in KJ/kg
Evaporation rate X (steam heat – feedwater heat) / lower heating value of fuel X boiler efficiency; the score is determined based on these values. No, don’t separate them:lol
Coal consumption = Evaporation rate X (enthalpy of steam at 7 kg of pressure – enthalpy of feedwater) / Lower heating value of fuel X Boiler efficiency
About 150 kg. It is related to the way the furnace burns