Different dust fractions, e.g. PM2.5 for environment- and PM4 for workplace limits, are in use to describe the respirable dust amount. International and national standards describe thereby different cut-off limits, measurement methods and calculation procedures. Especially continuous measuring devices that commonly work with optical or electronical auxiliary aids, cannot measure the same absolute respirable dust fraction, because of possible measuring errors. In order to solve this problem, laborious and costly procedures are necessary to have valid results merely for the calibrated dust. If not the measurement of a PM2.5 value for controlling standard dust limits, which are gravimetric defined, is the priority and regarding only the assessment and optimization of dust separators concerning to their respirable dust separation, a simplest possible measurement technique would be sufficient. In this paper, a method for the assessment of the respirable dust separation efficiency using solely an optical particle counter is presented. In addition, the application of this method is shown on the optimization of a special wet-scrubber and on the classification of cleanable dust filter media regarding their respirable dust separation efficiency and their energy consumption.

不同的粉尘含量，例如。用于环境的PM2.5和用于工作场所限值的PM4用于描述可吸入粉尘量。因此，国际和国家标准描述了不同的临界限值，测量方法和计算程序。尤其是通常与光学或电子辅助设备配合使用的连续测量设备，由于可能存在测量误差，因此无法测量相同的绝对可吸入灰尘分数。为了解决这个问题，需要费力且昂贵的过程以仅对校准的灰尘具有有效的结果。如果不是通过重量分析来确定用于控制标准粉尘极限的PM2.5值的测量，那么它是优先考虑的事项，并且仅涉及与可呼吸粉尘分离有关的粉尘分离器的评估和优化，最简单的可能的测量技术就足够了。在本文中，提出了一种仅使用光学粒子计数器评估可吸入灰尘分离效率的方法。此外，该方法的应用在优化专用湿式洗涤器以及可清洁粉尘过滤介质的可吸入粉尘分离效率和能耗方面也得到了展示。