苯乙烯通风系统优化研究

为了改善生产车间的通风状况,降低生产过程造成的苯乙烯污染,新风及排风系统的优化设计显得尤为重要。根据车间污染源分布特点,运用计算流体动力学(CFD)的数值模拟方法,对某产生苯乙烯的车间的通风系统进行模拟,使人体工作环境达标。结果表明,采用顶部送风,顶部排风和两侧墙排风的通风方式,并不能有效降低车间内苯乙烯的浓度。采用增大通风量的方式效果也不明显,尤其是车间下部浓度超标。根据模拟结果,采用地面排风口可以提高排风效率,在另两面侧墙的2个模具之间增设排风口也可达到很好的效果。

Optimization Study on Ventilation System of Styrene

To reduce styrene pollution caused by the production process and improve the ventilation,optimization design of fresh air and exhaust system is particularly important. According to pollution sources of workshop distribution characteristics, computational fluid dynamics( CFD) was used as numerical simulation method to simulate a styrene workshop ventilation system, so that the work environment meet standards. The results show that ventilation,including upward air-supply,upward exhaust and both sides of wall exhaust,can not effectively reduce the concentration of styrene in the workshop. Effect of decreasing concentration by increasing ventilation rate is not obvious,especially excessive concentration in the lower part of the workshop. According to the simulation results,two methods can be improved exhaust efficiency,that are ground exhaust and additional air vents in the side walls between the two molds.