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目的用一个参数值来评估一个大型燃煤锅炉所排放烟气中温度和化学物(SO2、NO、CO2)各自和综合污染分布特性,简化实际污染评估手段.方法通过数学模拟的方法建立大型锅炉烟气排放分析模型、建立排放烟气的温度分布、质量浓度分布、分布数学模型,并把所得的3种分布结果及特性进行比较.结果给出锅炉烟气排放分析模型中烟气的温度污染和主要排放物CO2,SO2,NO2的化学污染的火用值在排放高度、离地10m高度、和地面上沿风向分布的轴向模拟分析曲线、烟气的温度和主要排放物的浓度的分布曲线;找出烟气在3个不同高度污染的特点、污染的最严重地点,检查总污染的火用指标与各污染物单独评价指标的异同.结论得出仅用参数值作为污染评估值来评估排放烟气污染是完全可行的,而且充分显示了一个能联系不同自然学科,并在不同学科中自由转换的参数值火用作为污染评估标准的优越性.即可以把不同污染物的污染特性综合起来,集复杂的多种评估参数为一体,简化评估手段和方法,易于找到多种污染的最不利点.
Objective To evaluate the distribution of individual pollutants and chemical pollutants (SO2, NO, CO2) and the integrated pollution in a flue gas discharged from a large coal-fired boiler by using one parameter value, and to simplify the actual pollution assessment methods.Methods To establish a large Boiler flue gas emission analysis model to establish the temperature distribution, mass concentration distribution, distribution mathematical model of exhaust flue gas, and to compare the results and characteristics of the three distributions.Results The flue gas emissions Exergy values of temperature pollution and chemical emissions of major pollutants CO2, SO2 and NO2 at emission height, 10m above ground and axial simulated distribution along the wind direction on the ground, temperature of flue gas and concentrations of major pollutants The distribution curve of flue gas was found out, and the similarities and differences between the exergy indexes of the total pollution and those of the individual pollutants were checked.Finally, only the parameter value It is entirely feasible to evaluate emission values to evaluate flue gas emissions and to demonstrate that a parameter that links different nature disciplines and is freely convertible among different disciplines Value with fire superiority as a contamination assessment criteria. That can be contaminated properties of different pollutants together, more complex set of evaluation parameters into one, simplified methods and assessment tools, easy to find the most unfavorable spot a variety of pollution.