基于实际气体的增压富氧燃煤烟气焓值的计算

Enthalpy Calculation of Flue Gas from Pressurized Oxy-coal Combustion Based on Real Gas

将增压富氧条件下煤燃烧产生的烟气视为实际气体的理想混合物,在维里方程的基础上,采用余焓数法推导出烟气焓值的计算方程,并对6 MPa、2 MPa和0.5 MPa压力下的烟气焓值进行了计算和分析.结果表明:基于维里方程的余焓数法能很好地反映实际气体的特性,有较高的计算精度,可以用于实际工程计算.

Assuming that the flue gas produced during pressurized oxy-coal combustion as an ideal mixture of real gases, and on the basis of virial equation, the enthalpy of flue gas respectively generated at pressures of 6 MPa, 2 MPa and 0. 5 MPa were calculated based on equations derived using cofunction method. Results show that the cofunction method based on virial equation can effectively reflect the real gas characteristics, produce higher calculation accuracy, and therefore can be used for calculation of actual engineering projects.