中南大学学报（自然科学版）2024，Vol.55Issue(4)：1560-1566,7.DOI:10.11817/j.issn.1672-7207.2024.04.025
粉煤循环流化床锅炉0～1mm制粉系统开发与热力计算方法
Development and thermal calculation method of 0-1 mm pulverizing system for powdered coal-circulating fluidized bed boiler
摘要
Abstract
To realize the 0-1 mm coal feeding of the powdered coal-circulating fluidized bed,a 0-1 mm pulverizing system for PC-CFB boiler was developed based on the design and calculation experience of traditional pulverizing system.It was characterized by the use of vertical spindle mill to prepare the powdered coal and the use of gas-solid distributor to separate the powdered coal from exhaust gas,and a backup system was set to ensure the normal fuel supply in case of system failure.The thermal calculation model of the 0-1 mm pulverizing system was proposed,the key technical indicators such as the ventilation volume of the mill,the proportion and temperature of the desiccant were determined,the drying output of the pulverizing system was predicted,and the performance of the 0-1 mm pulverizing system for PC-CFB boiler was analyzed.The results show that keeping the output of the mill and the temperature of the hot air constant and reducing the outlet temperature of the mill within the allowable range of the system can reduce the drying dosage and increase the drying output.For every 1℃reduction in the outlet temperature of the mill,the drying dosage required by the pulverizing system is reduced by about 523 m3/h,and the drying output is increased by about 0.4 t/h.关键词
粉煤循环流化床/0～1mm粉煤/制粉系统/热力计算Key words
powdered coal-circulating fluidized bed/0-1 mm powdered coal/pulverizing system/thermal calculation分类
能源科技引用本文复制引用
尚曼霞,姚禹歌,柯希玮,周托,黄中..粉煤循环流化床锅炉0～1mm制粉系统开发与热力计算方法[J].中南大学学报（自然科学版）,2024,55(4):1560-1566,7.基金项目
国家重点研发计划项目(2022YFB4100301)(Project(2022YFB4100301)supported by the National Key Research and Development Program of China) （2022YFB4100301）
