The filtration efficiency of dust removal bags is an important indicator for evaluating the filtration performance of dust removal bags, and its testing method is also an important part of the work. Here are some common methods for testing the filtration efficiency of dust removal bags:
Electrostatic capture method: Dust containing gas is passed through a charged dust removal bag, and the principle of electrostatic adsorption is used to capture smaller particles of dust on the surface of the bag. Specific analytical instruments are used to detect the mass concentration of the dust, and then the filtration efficiency is calculated.
Sedimentation method: The dust containing gas is passed through a known mass dust removal bag, and the dust inside the bag is collected. The mass of the dust is calculated by weighing, and then the filtration efficiency is calculated.
Translucency method: To determine the concentration and filtration efficiency of dust by calculating the changes in grayscale. Firstly, use a light source to illuminate the dust removal bag, and then use a transmittance meter to measure the light passing through the bag, obtain the transmittance intensity value, and then calculate the dust concentration and filtration efficiency.
It should be noted that the above testing methods require multiple repeated experiments in practical applications to obtain more accurate test results. When conducting testing, it is also necessary to pay attention to some parameters of the measurement environment, such as temperature, humidity, flow rate, pressure, etc., to ensure the reliability of the test results.
In addition, the testing of dust removal bag filtration efficiency also needs to be evaluated in conjunction with practical application environments. Different application scenarios, gas types, dust concentrations, and other parameters can all have an impact on filtration efficiency, so a comprehensive evaluation needs to be conducted based on actual situations.