What are the composition, temperature, and pressure of the flue gases emitted by coal-fired power plants?
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It is emitted directly from coal-fired boilers, untreated! ! Actual measurement data is preferred! This post was last edited by haohuang on 2009-2-8 16:51]
Do you mean the chimney outlet? Around seventy or eighty degrees!
It is the flue gas emitted after combustion (untreated).
The theoretical composition of flue gas is CO2, SO2, N2, and H2O. Actual flue gas usually contains excess O2. During the operation of boilers, incomplete combustion products (such as CO, H2, CmHn, etc.) are often present in the flue gas. The composition of flue gas varies depending on the type of coal, excess air coefficient, boiler efficiency, operating conditions, etc. The specific values must be determined by using a flue gas analyzer for a particular boiler, given type of coal, and under defined operating conditions. The level of the theoretical combustion temperature is influenced by factors such as the calorific value of the fuel, the heat capacity of the combustion products, the amount of combustion products, the temperatures of the fuel and air, and the excess air coefficient.
There are data on NOx, SO2, and fly ash at this address: http://www.btpenghe.com/lunwen02-3.htm. However, this relates to the fluidized bed technology; it is estimated that the oxygen content is slightly lower in this case compared to that in chain grate boilers, while the amount of fly ash is higher. Last edited by RainWolf on 2009-2-13 09:37
In addition to what was discussed on the 4th floor, the flue gas also contains gases such as SO3 (the main component that causes low-temperature acid corrosion) and NOx.