基于气体-颗粒两相流模型的燃煤电厂粉尘运动规律预测

为了降低电厂粉尘污染,保护室内操作人员的身体健康,从产生粉尘漂浮运动的机理出发,采用数值模拟方法,通过建立煤粉颗粒的释放模型、沉降模型以及气体-颗粒两相流物理模型,对厂房内治理前、后的粉尘流动和分布情况进行了模拟分析。结果表明:通过合理调整厂房通风位置,可以有效降低现场粉尘浓度;工作人员采用合适的操作方式和选择合适的位置,可有效降低受污染影响的程度。此外,粉尘的运动规律预测可以为粉尘治理提供参考。

PREDICTION OF DUST MOVEMENT LAW IN COAL-FIRED POWER PLANTS BASED ON GAS-PARTICLE TWO-PHASE FLOW MODEL

In order to reduce dust pollution and protect the health of indoor operators in power plants, the pulverized coal particle release model, settling model and gas-particle two-phase flow physical model were established. And multi-phase flow numerical simulation method was used to simulate the dust flow and distribution before and after the treatment of the plant, based on the mechanism of dust floating and flying. The results showed that the dust concentration could be effectively reduced by adjusting the ventilation position of the workshop. Indoor workers could effectively reduce the degree of contamination by using appropriate operation methods and locating in the right direction. It was concluded that the prediction of dust movement law could provide theoretical guidance and basis for dust control in the related industries.