ABSTRACT

The purpose of this study was to determine the most efficient airborne asbestos filter for use in an HEPA negative air machines through filter performance testing. The filter classes applied conformed with ISO and European standard (EN 1822) regarding fractional efficiency by dust loading amount for filters, fractional efficiency for negative air machines, and consumption of electrical power at filter size 0.3 μm. Class H13 had the highest fractional efficiency among the three experimental filter classes by particle size, at face velocity of (1, 2, and 3) m/s. Melt-blown (MB) filters exhibited higher fractional performance than did glass-fiber filters at all particle sizes tested (0.3, 0.5, and 1.0 µm). The power consumption of glass-fiber filters was higher (at 10 m³/min) than that of melt-blown filters. Therefore, melt blown filters would be more cost-effective than glass fiber filters for use in HEPA negative air machines, for protection against airborne asbestos.

Implications: Air cleaner and related systems were developed to control a variety of airborne pollutants in general indoor environments, but there was no certified system for focusing on asbestos fractional efficiency using filter tests. Class H13 had the highest fractional efficiency among the three experimental filter classes by particle size, at face velocity of (1, 2, and 3) m/s. Melt-blown filters exhibited higher fractional performance than did glass-fiber filters at all particle sizes tested (0.3, 0.5, and 1.0 µm). The power consumption of glass-fiber filters was higher (at 10 m³/min) than that of melt-blown filters.

摘要

本研究的目的是通过过滤器性能测试确定用于 HEPA 负空气机器的最有效的空气石棉过滤器。所应用的过滤器等级符合 ISO 和欧洲标准 (EN 1822) 关于过滤器的灰尘负载量的分数效率、负空气机的分数效率以及过滤器尺寸 0.3 μm 的电力消耗。H13 类在三个实验过滤器类别中按颗粒大小在（1、2 和 3）m/s 的面速度下具有最高的分数效率。在所有测试的粒径（0.3、0.5 和 1.0 µm）下，熔喷 (MB) 过滤器均表现出比玻璃纤维过滤器更高的分数性能。玻璃纤维过滤器的功耗更高（在 10 m ³/min) 高于熔喷过滤器。因此，熔喷过滤器比用于 HEPA 负空气机器的玻璃纤维过滤器更具成本效益，以防止空气中的石棉。

影响：开发了空气净化器和相关系统来控制一般室内环境中的各种空气污染物，但没有经过认证的系统使用过滤器测试来关注石棉部分效率。H13 类在三个实验过滤器类别中按颗粒大小在（1、2 和 3）m/s 的面速度下具有最高的分数效率。在所有测试的颗粒尺寸（0.3、0.5 和 1.0 µm）下，熔喷过滤器都表现出比玻璃纤维过滤器更高的分数性能。玻璃纤维过滤器的耗电量（10 m ³ /min）高于熔喷过滤器。