燃煤电站污染物影响的系统性环境成本分析

Environmental Cost Analysis of Flue Gas Pollutants in a Coal-fired Power Plant

为全局性、系统性地分析电站锅炉污染物传递变化及其对直接环境成本的影响,提出了系统化分析的方法策略,建立了以污染物脱除效率为目标的总直接环境成本模型,明确了脱除效率及其关键参数与总直接环境成本之间的响应关系,并以某600 MW燃煤发电机组的环保岛为对象进行研究,形成了以锅炉脱硝反应器入口的温度和烟速为输入参数,与以脱硝效率、除尘效率及脱硫效率为目标参数的系统模型关系。并在此基础上,研究了污染物排放造成的环境损失情况,分析了电站锅炉的污染物综合脱除能力。最后,进行了约束条件下的目标函数极值处理,获得了相应的入口烟气最佳的温度为320℃,流速为11.2 m/s。

To systematically analyze the change of pollutant transmission in power station boiler and its influence on direct environment cost,it puts forward a method and a strategy to analyze systematically;it establishes a total direct environment cost model based on pollutant removal efficiency;and it builds a relationship between direct environment cost and removal efficiency as well as its key parameters.With the research on the environmental protection island of a 600 MW coal-fired unit,it forms a model system with the input parameter from the temperature and velocity of denitrification reactor and the target parameters combined with the efficiency of denitration,dedusting and desulfurization.Owing to this,it studies the situations of environment disruption caused by pollutant discharge and analyses the comprehensive removal capacity of the pollutants in power station boilers.And finally,it can obtain the best flue gas temperature of 320℃and the corresponding velocity 11.2 m/s by processing the extremum of the object function in the constraint condition.