糖蜜酒精废液焚烧炉水冷壁结渣原因探析

Mechanism of the slagging on water-cooled wall combusting the molasses alcohol waste

焚烧法是糖蜜酒精废液减量化、资源化处理良好的技术路径之一,而由水冷壁挂渣的快速形成所导致的焚烧炉不能长时间运行是此技术存在的主要问题。文章研究了流化床焚烧炉的水冷壁挂渣的形成机制。使用X射线衍射法分析了挂渣的主要组分为KCl,并掺杂了少量K2SO4。通过电子显微镜扫描了挂渣横断面的微观形貌,研究表明,挂渣是由烟气中的气溶胶粒子冲刷水冷壁累积而成。使用HSC-Chemical软件对糖蜜酒精废液焚烧中K,Cl释放的热力学进行了模拟分析,模拟结果与试验分析非常匹配。

Incineration is one of good technical paths for realizing the reduction and recycling of molasses alcohol waste, however, the ash slag on water-cooled wall formed rapidly reduces the heat-transfer capability. As a result, the incinerator can not keep a long-running, which is the principal problem of the technique. In this paper, ash slag on water-cooled wall in a fluidized bed boiler is collected and analyzed to understand the formation mechanism. The main phase compo- nents are analyzed by the X-ray diffraction. KC1 is the main component of the slag, and there is a small amount of K2SO4. The scanning electron microscope is used to analyze the microstructure of the slag＇s cross-section. It is suggested that slag is accumulated by the aerosol particles （mainly KC1 and K2SO4） washing on the water-cooled wall. The HSC-Chemieal software is used to simula-tion analyze the thermodynamics of K, C1 when combusting the molasses alcohol waste, and the simulation results match on the experimental analysis.