摘要
针对钢铁厂转炉湿法除尘系统中烟气颗粒物无法被有效捕获以及转炉煤气回收品味低、回收效率小的问题,在广东某钢铁厂对转炉湿法除尘系统开展优化改造实践。介绍了转炉湿法除尘技术的原理和当前除尘系统存在的问题,烟气中的颗粒物与细小水颗粒发生凝聚后无法有效脱水,大幅降低除尘效率。对现有转炉湿法除尘系统进行改造,优化除尘工艺路径,对节能洗涤塔、线性环缝文氏管和旋流脱水器进行结构优化,增设以陶瓷烟气湿度检测器为核心的洗涤塔烟气湿度控制网络。结合实际生产数据,对转炉湿法除尘系统优化改造实践进行经济效益和社会效益分析。实践结果显示,转炉烟气中的颗粒物含量从改造前的60.87mg/m^(3)下降至17.51mg/m^(3),煤气回收量从原先的76.94m^(3)/t提升至87.96m^(3)/t,并对水电资源的节约具有显著影响。实践表明,对转炉湿法除尘系统的优化改造实践有效降低烟气中颗粒物的排放,提高了转炉煤气的回收量,减少了水电资源和检修人工成本,取得了良好的经济、社会效益。
Aimed at the problems of ineffective capture of flue gas particles in the wet dedusting system of the converter in an iron and steel plant and low recovery quality and efficiency of converter gas,the optimization and transformation of the wet dedusting system of the converter was carried out in an iron and steel plant in Guangdong.The principle of converter wet dedusting technology and the existing problems in the current dedusting system were introduced.The particles in the flue gas and fine water particles cannot be effectively dehydrated after condensation,which greatly reduces the dedusting efficiency.The existing wet dedusting system of converter was reformed,the dedusting process path was optimized,the structure of energy-saving scrubbing tower,linear circular slot Venturi and cyclone dehydrator was optimized,and the flue gas humidity control network of scrubbing tower with ceramic flue gas humidity detector as the core was added.Combined with the actual production data,the economic and social benefits of the optimization and transformation of the converter wet dedusting system were analyzed.The practice results show that the content of particulate matter in converter flue gas decreases from 60.87 mg/m^(3) before transformation to17.51 mg/m^(3),and the recovery of gas increases from 76.94 m^(3)/t to 87.96 m^(3)/t,which has a significant impact on the conservation of hydropower resources.The practice shows that the optimization and transformation of the converter wet dedusting system can effectively reduce the emission of particles in flue gas,improve the recovery of converter gas,reduce water and electricity resources and maintenance labor costs,and achieve good economic and social benefits.
作者
冯梦雅
李军
赖颖
Feng Mengya;Li Jun;Lai Ying(Guangdong Songshan Polytechnic College,Shaoguan,Guangdong 515126,China;Zhuhai Yueyufeng Steel Co.Ltd.,Zhuhai,Guangdong 519050,China)
出处
《机电工程技术》
2023年第1期267-270,共4页
Mechanical & Electrical Engineering Technology
基金
2021年度韶关市科技计划项目(社会发展方向)(编号:210722154531359)。
关键词
转炉
除尘系统
湿法
优化改造
converter
dust pelletizing system
wet process
optimization and modification
