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
With the improvement of the environment by the country in recent years, biomass boilers have become more popular among industrial boilers. The biomass fuel used in biomass boilers is easy to control in combustion and easy to ignite. In addition, its burning speed is also faster than that of coal, biomass boilers can be ignited and extinguished at any time, and can also be automatically ignited, while coal-fired boilers cannot be ignited and extinguished at any time. The material heating boiler is a representative of environmentally friendly boilers that use biomass pellet fuel to provide hot water or steam for heating for industrial production. As the price of natural gas rises and the impact of objective factors such as serious coal pollution, biomass heating boilers are energy-saving and environmentally friendly products.
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