Coal Fire Boiler Steam Generation Cost

Traditional coal-fired boilers are implemented according to national policies and face the danger of being eliminated, but large and medium-sized coal-fired boilers are the main body of the national boiler industry.

To calculate the coal consumption of a 10-ton coal-fired boiler, we must first know the temperature of the boiler’s output steam and the pressure of the boiler. When the pressure and temperature are constant, there will be a corresponding enthalpy value, and the boiler feed water will also be at the corresponding temperature and pressure. There is a corresponding enthalpy value, the difference between the enthalpy value and the steam evaporation amount is the heat required for the boiler to export steam; the output heat is equal to the input heat multiplied by the boiler thermal efficiency, and then the input heat is used to obtain the low heat of coal combustion to obtain the boiler Coal consumption.

Specific calculation method:

The enthalpy of saturated steam at 1.25MPa is 2788KJ/kg, and the enthalpy of water inlet (20 degrees) is 84 KJ/kg

The heat required to produce 1t steam is:

Q = 1000 x (2788-84) = 2704000 (KJ) = 2704000/4.18 = 646890 (kcal)

The calorific value of grade 2 standard coal is 5500kcal/kg

The thermal efficiency of coal-fired boilers is generally 78%

Fuel consumption to produce 1t steam: 646890/5500/78%= 150.1kg

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