超超临界燃准东煤机组吹灰系统优化研究  

Optimization Study on Soot Blowing System for Ultra⁃supercritical Burning Zhundong Coal Unit

作　　者：孟强 胡丽娜 程泽宁 杨志龙 MENG Qiang;HU Li-na;CHENG Ze-ning;YANG Zhi-long(College of Electrical Engineering,Xinjiang University,Urumqi,China,Post Code:830046;Zhundong Energy Research Institute,Xinjiang Tianchi Energy Sources Co.,Ltd.,Changji,China,Post Code:831100;Xinjiang Zhundong TBEA Energy Co.,Ltd.,Changji,China,Post Code:831799)

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 [3]新疆准东特变能源有限责任公司,新疆昌吉831799

出　　处：《热能动力工程》2023年第8期95-102,共8页Journal of Engineering for Thermal Energy and Power

基　　金：庭州青年计划项目(2021QN08);天山青年计划(2020Q012);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)。

摘　　要：吹灰是清除受热面积灰结渣的一种有效手段。目前电厂吹灰的频率和时机通常是依靠经验判断,效率低且经济成本高。为改善吹灰方式,以新疆准东地区某台660 MW超超临界燃煤电站锅炉为研究对象,基于电厂分布式控制系统(DCS)中的运行数据、受热面管束排布方式及入炉煤的煤质特性,运用热平衡法求出受热面上的灰污系数,并构建在线监测模型,利用该模型优化原有的吹灰系统。结果表明:优化后1天内吹灰频率减少4次,可为电厂节省约76.26 t煤,说明此优化模型经济效益十分明显。Soot blowing is a very effective means to remove ash and slag from heating surface.At present,the frequency and timing of soot blowing in power plants are mostly judged by experience,which is low in efficiency and high in economic cost.To improve the way of blowing blindly,this paper takes a 660 MW ultra⁃supercritical coal⁃fired utility boiler in Xinjiang Zhundong region as the research object,based on the operation data of distributed control system(DCS)of power plant,heating surface tube bundle arrangement way,medium characteristics of coal in furnace,the fouling coefficient of heating surface is calculated by using heat balance method,and online monitoring model is built to optimize the original soot blowing system.Results show that after the optimization,the soot blowing frequency is reduced 4 times in one day,which can save about 76.26 ton of coal for the power plant,indicating that the economic benefit of the optimization model is very obvious.

关 键 词：积灰结渣 热平衡法 在线监测 灰污系数 吹灰时长 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]