燃准东煤锅炉水冷壁灰沉积特性研究  

Research on Ash Deposition Characteristics of Water-cooled Wall of Zhundong Coal-fired Boiler

作　　者：张文超 胡丽娜 程泽宁 丁琦恒 ZHANG Wenchao;HU Lina;CHENG Zening;DING Qiheng(School of Electrical Engineering,Xinjiang University,Urumqi,China,830046;Zhundong Energy Research Institute,Xinjiang Tianchi Energy Co.,Ltd.,Changji,China,831100)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830046 [2]新疆天池能源有限责任公司准东能源研究院,新疆昌吉831100

出　　处：《热能动力工程》2024年第5期112-122,共11页Journal of Engineering for Thermal Energy and Power

基　　金：新疆维吾尔自治区重大专项“超超临界燃用准东煤机组的节能减碳技术研究”(2022A01002-2);新疆维吾尔自治区天池百人引进计划(TCBR202106)。

摘　　要：为了优化炉内燃烧,降低水冷壁结渣,以某电厂660 MW超超临界燃准东煤四角切圆锅炉为研究对象,在气固两相燃烧模型的基础上加载自定义的udf程序并耦合飞灰颗粒沉积模型,对锅炉辐射受热面灰颗粒沉积分布情况进行数值模拟研究。结果表明:在75%THA工况下,炉膛26~29 m和32~35 m高度区间内受热面的灰颗粒沉积速率最大;炉膛四墙的灰沉积分布具有相似性,沿着锅炉宽度和深度方向,壁面中间位置灰颗粒沉积速率最大,并且向两边逐渐减少;当负荷由75%THA增大到100%THA时,壁面灰颗粒沉积速率和沉积范围变大。In order to optimize the combustion in the furnace and reduce the water-cooled wall slagging,the 660 MW ultra-supercritical Zhundong coal-fired tangentially fired boiler in a power plant was taken as the research object.On the basis of the gas-solid two-phase combustion model,the self-defined udf pro-gram was loaded coupling with the fly-ash particles deposition model.The numerical simulation research on the distribution of ash particles deposition on the boiler radiant heated surface was conducted.The re-sults show that under 75%THA condition,the ash particle deposition rate on the heating surface is the largest in the height interval of 26-29 m and 32-35 m in the furnace;the ash deposition distributions on the four walls of the furnace are similar,with the maximum rate of ash particle deposition in the middle position along the width and depth directions of the boiler,which decreases gradually to both sides;as the load increases from 75%THA to 100%THA,the wall ash particle deposition rate increases and the deposition range becomes larger.

关 键 词：水冷壁 灰沉积 数值模拟 结渣 准东煤 

分 类 号：TM621.2[电气工程—电力系统及自动化]