富氧燃烧对篦冷机热回收效率的影响

Effect of Oxygen-enriched Combustion on Heat Recovery Efficiency of Grate Cooler

为验证水泥窑使用富氧燃烧技术前后篦冷机热回收效率的变化。现以某水泥厂4 500 t/d水泥生产线富氧燃烧技改为例,分析对比技改前后篦冷机系统主要技术经济指标的变化,并计算技改后篦冷机热回收效率。结果表明:在水泥生产过程进行富氧燃烧技术改造后,提高了二、三次风风温及总风量,对篦冷机的热回收效率有促进影响;当富氧空气中的含氧量达到36.6%时,篦冷机的热回收效率达到71.1%;较空气助燃时的篦冷机热回收效率70.5%提高了0.6%。该技术符合“双碳”策略,有助于水泥生产过程中节能降碳。

To verify the change of heat recovery efficiency of grate cooler before and after using oxygen-enriched combustion technology in cement kiln.Taking the technical reform of 4500 t/d cement production line for oxygen-enriched combustion in a cement plant as an example,the changes of main technical and economic indexes of grate cooler system before and after the technical reform are analyzed and compared,and the heat recovery efficiency of grate cooler after the technical reform is calculated.The results show that the secondary and tertiary air temperature and total air volume are increased after the transformation of oxygen-enriched combustion technology in cement production process,and the heat recovery efficiency of the grate cooler is promoted.When the oxygen content in the oxygen-rich air reaches 36.6%,the heat recovery efficiency of the grate cooler reaches 71.1%.The heat recovery efficiency of the grate cooler is increased by 0.6%compared with 70.5%in the air-assisted combustion.The technology conforms to the"two-carbon"strategy and helps to save energy and reduce carbon in the cement production process.