煤炭转化2025，Vol.48Issue(5)：25-39,15.DOI:10.19726/j.cnki.ebcc.202505003
宽负荷下墙式风喷氨对炉内燃烧特性的影响分析
Impact analysis of wall-mounted air-assisted ammonia injection on furnace combustion characteristics under wide load range
摘要
Abstract
In response to the urgent demands of carbon neutrality,the operational mode of coal-fired power plants is gradually shifting toward deep peak regulation,making low-load stable combustion and pollutant/carbon emission control issues to be addressed.This study focuses on a 660 MW coal-fired boiler with a wall-air injection system implemented.A full-scale three-dimensional model was constructed,and numerical simulations were performed using ANSYS Fluent.Four typical load conditions were simulated.Additionally,the effects of ammonia co-firing through wall-air systems on pollutant emissions under various loads were explored.The results show that with an increase in the ammonia blending ratio,the CO2 emission decreases significantly,with reduction ratios of 76%to 80%from 660 MW to 231 MW when the ammonia blending ratio reaches 0.8.However,the NO emission presents a nonlinear trend,peaking at an ammonia blending ratio of 0.6,while decreasing at 0.8 due to a nenhanced reduction effect.Under the low-load condition(231 MW),when the ammonia blending ratio is 0.2,the NO emission is lower than those under pure coal combustion conditions,indicating that ammonia-blended combustion offers better environmental performance at low loads.In addition,ammonia-blended combustion improves the combustion stability at low loads.At a load of 231 MW,the average temperature in the main combustion zone increases by up to 163 K,effectively alleviating the problem of decreasing combustion efficiency during low-load operation.However,it should be noted that a high ammonia blending ratio(0.8)may lead to a decrease in the temperature of the main combustion zone,potentially affecting the combustion efficiency.关键词
四角切圆锅炉/数值模拟/墙式风/煤粉掺氨燃烧/CO2减排Key words
four-corner tangential firing boiler/numerical simulation/wall-air combustion system/ammonia-coal co-firing/CO2 emissions reduction分类
信息技术与安全科学引用本文复制引用
关凯方,郑子鹏,顾文波,依力哈木·依明,何万尧,程泽宁..宽负荷下墙式风喷氨对炉内燃烧特性的影响分析[J].煤炭转化,2025,48(5):25-39,15.基金项目
新疆维吾尔自治区重大科技专项课题(2023A01005-2). （2023A01005-2）
