循环流化床锅炉节能减碳运行调控及工程验证  

Energy-saving and carbon-reducing operation control and engineering verification of circulating fluidized bed boiler

作　　者：李钦武[1,2,3] 俞李斌 刘庭宇 张京旭 翁卫国 郑政杰[2] 王韬 王海 郑成航 高翔[1,3] LI Qinwu;YU Libin;LIU Tingyu;ZHANG Jingxu;WEN Weiguo;ZHENG Zhengjie;WANG Tao;WANG Hai;ZHENG Chenghang;GAO Xiang(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China;Zhejiang Hope Environmental Protection Engineering Limited Company,Hangzhou 310012,China;Institute of Carbon Neutrality,Zhejiang University,Hangzhou 310027,China;Jiaxing Research Institute,Zhejiang University,Jiaxing 314001,China)

机构地区：[1]浙江大学能源高效清洁利用全国重点实验室,浙江杭州310027 [2]浙江浩普环保工程有限公司,浙江杭州310012 [3]浙江大学碳中和研究院,浙江杭州310027 [4]浙江大学嘉兴研究院,浙江嘉兴314001

出　　处：《浙江大学学报（工学版）》2024年第8期1618-1627,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(42341208);中央高校基本科研业务费专项资金资助项目(2022ZJJH02-03).

摘　　要：构建基于烟气中氧气体积分数及炉膛出口压力的锅炉运行协同控制模型,可以实时、准确地预测烟气中氧气体积分数的变化趋势,提前给定锅炉二次风机和引风机控制指令,显著减小了不同负荷条件下锅炉烟气中氧气体积分数、负压等关键运行参数的波动.在300 t/h循环流化床锅炉上的工业验证结果表明:利用协同控制模型可以提高锅炉运行控制的品质,锅炉变负荷工况条件下烟气中氧气体积分数控制在目标值±0.25%范围内,炉膛出口压力控制在目标值±45 Pa范围内的统计概率为99%.运行一周的统计结果表明,相比于原有控制,协同控制模型投运后单位产汽量耗煤可以减小1.508%,单位产汽量风机耗电可以减少1.886%.A cooperative control model based on volume fraction of oxygen in flue gas and furnace outlet pressure was established in order to accurately predict the trend of real-time volume fraction of oxygen and provide control instructions for the secondary air fan and induced draft fan of the boiler in advance.Then the fluctuation of key operating parameters such as volume fraction of oxygen and furnace outlet pressure of the boiler was significantly reduced under different load conditions.The industrial validation results on a 300 t/h circulating fluidized bed boiler show that the cooperative control model can improve the quality of boiler operation and control.The statistical probability that the volume fraction of oxygen was controlled within the target value of±0.25%,and the furnace outlet pressure was controlled within the target value of±45 Pa under varying load conditions was 99%.The statistical results of one week’s operation showed that the cooperative control model could reduce coal consumption per unit of steam production by 1.508%,and fan power consumption per unit of steam production by 1.886%compared with the original control.

关 键 词：氧气体积分数 协同控制模型 炉膛出口压力 节能减碳 

分 类 号：X51[环境科学与工程—环境工程]