生物质循环流化床锅炉床温动态模型研究  

Study on dynamic bed temperature model of biomass circulating fluidized bed boiler

作　　者：高明明 刘博通 张开萍 王亚柯 岳光溪[3] GAO Mingming;LIU Botong;ZHANG Kaiping;WANG Yake;YUE Guangxi(State Key Laboratory of New EnergyPower System(North China Electric Power University),Beijing 102206,China;Huaneng New Energy CorporationLtd.,Beijing 100036,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]华能新能源股份有限公司,北京100036 [3]清华大学能源与动力工程系,北京100084

出　　处：《热力发电》2023年第4期72-81,共10页Thermal Power Generation

基　　金：中国华能集团有限公司总部科技项目基础能源科技研究专项(HNKJ21-H31);山西省科技厅揭榜招标项目(20191101013);中国华电集团有限公司重大科技项目计划(CHDKJ19-01-88)。

摘　　要：为明确生物质循环流化床锅炉床温动态特性,建立更加适合生物质的循环流化床燃烧控制系统;通过分析生物质燃烧过程以及燃烧机理,基于即燃碳燃烧理论,建立床温动态模型,并对炉内温度场进行关联度计算分析。结果表明:计算的床温能够基本稳定在实际床温滤波值附近,且床温变化趋势和实际滤波床温相近,验证了模型的适应性和有效性;生物质循环流化床锅炉炉膛上下部的温度关联性差异与含氧量和炉膛温度有关,左右侧温度差异受烟气流量影响较大,在炉膛上部,物料浓度和受热面布置不均也是影响温度特性的重要原因。In order to clarify the dynamic characteristics of bed temperature of biomass circulating fluidized bed(CFB) boiler, so as to establish a CFB combustion control system which is more suitable for biomass, a dynamic bed temperature model is established by analyzing the biomass combustion process and combustion mechanism.On the basis of the theory of instant burning carbon combustion, the correlation degree of temperature field in the furnace is calculated and analyzed. The results show that, the calculated bed temperature can be controlled basically stable near the filtering value of the actual bed temperature, and the variation trend of the bed temperature is similar to that of the actual filter bed temperature, which verifies the adaptability and effectiveness of the model. The temperature correlation difference of the upper and lower parts of the biomass CFB boiler is related to the oxygen content and the temperature of the furnace. The temperature difference of the left and right sides is greatly affected by the flue gas flow. In the upper part of the furnace, the material concentration and the uneven heating surface arrangement are also important reasons affecting the temperature characteristics.

关 键 词：生物质 循环流化床 炉膛温度 床温软测量 灰色关联度分析 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程] TK6