某机加工车间油雾颗粒监测与净化研究

Monitoring and purification of oil mist particles in a machining workshop

以一个典型汽车零部件机加工车间为对象,调研了其生产工艺,分析了油雾散发的基本原理。为了监测车间内空气中油雾浓度动态水平,开发了油雾在线监测系统,对车间内油雾浓度进行了连续观测,分析了典型位置油雾浓度与区域设备的关系,并调研了车间内设备油雾净化器安装情况,测试了油雾净化器的风量与出口浓度。结果表明:在生产期间车间呼吸区的油雾浓度显著高于美国国家职业安全与健康研究所(NIOSH)推荐的油雾接触限值(0.5mg/m^3);油雾排放源头控制至关重要,在过滤、离心和静电等多种净化设备中,静电净化设备出口浓度最低,并能维持较高的风量。

Taking a typical automobile parts machining workshop as an object, investigates the production process and analyses the basic principle of oil mist emission. In order to monitor the dynamic level of oil mist concentration in the air of the workshop, develops an on-line monitoring system for oil mist concentration, carries out a continuous test on oil mist concentration in the workshop, analyses the relationship between oil mist concentration at typical locations and regional equipment, investigates the installation of oil mist purifiers in the workshop equipment and tests the air rate and outlet concentration of oil mist purifiers. The results show that the concentration of oil mist in the respiratory area of the workshop is significantly higher than that recommended by American National Institute of Occupational Safety and Health (NIOSH)(0.5 mg/m^3), and the source control of oil mist emission is very important, among various kinds of purification equipment, such as filtration, centrifugation and static electricity, the outlet concentration of electrostatic purification equipment is the lowest, maintaining a high air rate.