摘要
利用开发设计的一套物料自由下落在线喷水自控装置,研究了在线喷水降低煤处理过程中随机性粉尘的产生。通过SEM-EDX观察了实验物料的形貌并分析了化学成分。采用气水两相的喷嘴可以在较小的加水流量下产生更多的细小水滴,具有更好的降尘效果。空气压力、加水位置和加水流量对随机性粉尘的产生均有影响,通过实验确定出最佳加水压力、位置和流量。建立加水流量与降尘率之间的关系模型,可以定量地计算加水量,优化在线加水条件,以便减少物料性质的改变和节约降尘的加水成本。
Study was conducted on fugitive dust suppression by an on-line water spraying system in the process of coal handling by using a new automatic water spraying device for bulk material fall. The shape and chemical composition of bulk material were investigated by SEM-EDX. Air-water nozzle was used to produce more finer droplets under lower water flow, which has a good suppression effect. Air pressure, spraying position and water flow have influence on dust suppression. the optimal air pressure, spraying position and water flow were found out by experiments. Adding chemical suppression agent to water can greatly improve dust suppression efficiency. A model of water flow and dust suppression efficiency was thus set up, with which water flow can be calculated. By optimizing water-spraying conditions, spraying water flow can be reduced greatly so that the property of bulk material can't be changed and spraying water cost can be lowered.
出处
《矿业安全与环保》
北大核心
2007年第2期15-18,共4页
Mining Safety & Environmental Protection
基金
中-奥(地利)国际间科技合作项目(No.Ⅵ.A.8)
山东省科技攻关项目(2005GG3206093)
