Background

The traditional wet dust removal technology is not effective in removing fine particles with low concentration, which is far from meeting the ultra-low emission and production requirements. However, national emission requirements for fine particles are becoming more stringent year by year. Therefore, it is vital to explore a purification technology for low concentration of fine particles.

Methods

Coal-fired fly ash was used to simulate low concentration dust-containing gas and a pilot-scale experimental system was set up employing a cross-flow rotating packed bed (RPB) as the wet separation device to explore the purification capacity of high gravity wet dust removal technology for low concentration fine particles.

Significant Findings

The obtained results suggested that under the operating conditions of inlet dust concentration of 50 mg/m³, high gravity factor of 138.36, gas velocity of 1.71 m/s and liquid spray density of 4.8 m³/(m²·h), the dust removal efficiency was 99.46%. The cut-off particle size of RPB was 0.09 μm, and the fine particles removal efficiency with particle size above 0.2 μm was more than 95%. It can be seen that high gravity wet dust removal technology is a wonderful technology for deep purification of fine particles with strong industrial application potential.

中文翻译：

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错流旋转填充床深度净化低浓度细颗粒

背景

传统湿法除尘技术对低浓度细颗粒物去除效果不佳，远不能满足超低排放和生产要求。然而，国家对细颗粒物的排放要求正逐年严格。因此，探索低浓度细颗粒物的净化技术显得尤为重要。

方法

【摘要】：以燃煤粉煤灰模拟低浓度含尘气体,搭建以错流旋转填料床(RPB)为湿法分离装置的中试系统,探索高比重湿法净化能力。低浓度细颗粒物除尘技术。

重要发现

结果表明，在入口粉尘浓度为50 mg/m ³、重力系数为138.36、气速为1.71 m/s、液体喷雾密度为4.8 m ³ /(m ² ·h)的工况下，除尘效率为99.46%。RPB的截止粒径为0.09μm，粒径在0.2μm以上的细颗粒物去除效率在95%以上。由此可见，超重力湿法除尘技术是一项具有强大工业应用潜力的精细颗粒物深度净化的奇葩技术。