煤粉和麦秆加压富氧共燃中燃烧特性和硫转化规律实验研究  

Experimental study on combustion characteristics and sulfur transformation in pressurized oxy-fuel co-combustion of pulverized coal and wheat straw

作　　者：梁晓锐 王勤辉[1] 骆仲泱 冯毅 韩龙 李思敏 余鹏 薛爽 LIANG Xiaorui;WANG Qinhui;LUO Zhongyang;FENG Yi;HAN Long;LI Simin;YU Peng;XUE Shuang(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China;Institute of Energy and Power Engineering,College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]浙江工业大学能源与动力工程研究所,浙江杭州310014

出　　处：《热力发电》2021年第6期18-25,共8页Thermal Power Generation

基　　金：国家自然科学基金项目(51661125012)。

摘　　要：作为一项可减少温室气体排放先进、高效的碳捕集技术,加压富氧共燃技术引起了全世界的关注。本文采用加压热重平台研究了煤粉和麦秆在加压富氧混合燃烧中的燃烧特性和硫转化规律。热重分析表明:在煤中掺混麦秆有利于改善燃烧特性并促进燃烧阶段的完成,证明了麦秆与煤粉的共混物作为潜在的高反应性复合燃料的可行性;此外,操作压力和温度均对共混物的燃烧特性表现出一定的影响。对灰渣的晶相结构、微观形貌和元素含量分析结果表明,将生物质掺入煤中进行共燃烧可以有效减少硫化合物的排放。探究加压富氧条件下操作参数对含硫产物转化的影响非常重要,这将有助于促进加压富氧共燃技术在大型锅炉中的应用。As a cutting-edge high-efficiency combustion technology for carbon capture to reduce greenhouse gas emissions,pressurized oxy-fuel co-combustion has attracted worldwide attention.Experimental investigations were conducted to figure out the combustion characteristics and sulfur transformation in pressurized oxy-fuel cocombustion of pulverized coal and wheat straw.Analysis from thermogravimeter indicates that blending of straw into coal is beneficial to improve the combustion characteristics and facilitate the completion of the combustion stage,illustrating the feasibility of straw-coal blends as the potential highly-reactive composite-fuel.Both operation pressure and temperature displayed limited influence on the combustion characteristics of the blends.The research of mixture ratio on crystal phase,micro-structure,and elemental content of the ash residue help to explain the sulfur transformation during the combustion process,inferring that blending biomass into coal for co-combustion can effectively reduce the emissions of sulfur compounds.These results show the importance of understanding the impact of operating parameters on sulfur-containing products transformation in pressurized oxy-fuel conditions,which will help to facilitate the application of pressurized oxy-fuel co-combustion technology in large-scale boilers.

关 键 词：加压 富氧 共燃 燃烧特性 硫 煤粉 生物质 

分 类 号：TQ530.2[化学工程—煤化学工程]