面向灵活性发电的燃煤机组大气排放特性分析
摘要：随着可再生能源发电在电网中占比逐年增加，越来越多的燃煤机组参与灵活性发电。为了弄清灵活性发电燃煤机组的大气排放特性，以某亚临界600 MW和300 MW机组为例，通过对运行数据进行回归分析，获得了机组在启动、正常调峰和深度调峰阶段的CO2、NOx、SO2和粉尘的排放特性。结果表明：正常调峰阶段，随着机组负荷下降，煤耗和CO2排放因子逐渐增大，净烟气NOx排放因子先减小后增大，SO2排放因子略有下降；粉尘排放因子略有上升；深度调峰阶段，随机组负荷的进一步降低煤耗和CO2排放因子明显增大，净烟气NOx和粉尘排放因子迅速增大，SO2排放因子继续下降；启动过程净烟气NOx和粉尘排放因子明显高于调峰工况，SO2排放因子略小于调峰工况。另外，调峰过程中较高的升降负荷率使得原烟气NOx、SO2排放因子明显增大，净烟气粉尘排放因子明显增大。
Abstract:With the increasing share of renewable energy in power system, more and more coal-fired power units participate flexibility generation. For clarifying the air emission characteristics of flexibility generation, the operation history data of two subcritical coal-fired power units (600 MW and 300 MW) are used for regression analysis. In normal cyclic operation, power ramping-down will lead to a little increase in coal consumption rate and CO2 emissions factor. Meanwhile, the NOx emissions factor will decrease firstly and then increase when ramping down and the amplitude of variation is little in clean flue gas. The SO2 emissions factor will decrease a little while dust factor will increase a little when ramping down. In deep cycling operation, the increase in coal consumption rate and CO2 emissions factor will be much larger, while the NOx and dust emissions factors will increase substantially when SO2 emissions factor continues to decrease in clean flue gas. In start-up process, the NOx and dust emissions are much larger while SO2 emissions are slightly smaller than regular operating conditions. In addition, larger ramping rate has remarkable impact on NOx and SO2 in untreated flue gas and on dust in clean flue gas in deep cycling conditions.
标题：面向灵活性发电的燃煤机组大气排放特性分析
title:Air Emissions Characteristics of Coal-Fired Power Unit for Flexibility Generation
作者：董玉亮,袁家海,马丽荣
authors:Yuliang DONG,Jiahai YUAN,Lirong MA
关键词：燃煤机组,灵活性发电,大气排放特性,回归分析,
keywords:coal-fired power unit,flexibility generation,air emissions characteristics,regression analysis,
发表日期：2018-10-30
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