Sampling of filter bags

Before dust removal equipment into operation, the corresponding batch filter bags for sampling, to check whether it is compliant. But before the bag with the quality of sampling to be carried out, but also need to follow-up examination after using, detection index includes the mass per unit area, thickness, diameter, semi-perimeter, length, breathable, dry heat shrinkage resistance, strength, and sewing case filtration performance. Dust filter bag sampling device is good or bad in the end how to do it? Is the main bag test to see just described it? In fact, those are the basic work, if there is a special feature of the bag, but also consider temperature strength, corrosion resistance and anti-static properties. We generally proceed as follows: 1. Let’s look at the length of bag deviation calculation, you first need to bag flat on the floor, close to the bag with a tape measure to measure body surface to see whether the parameters described deviation. 2. Second, look at the quality of sewing bag bag body position, there is no needle. General practice is to bag the seam visually backlight, translucent look is not obvious, and can filter filtration performance testing. If the eye of a needle larger filtration efficiency worse. 3. Then the bag is to look at uniformity, which directly affect the performance of the filter bag and filter bag life , in fact, in practice, it is easy to overlook the technical specifications would be, but it’s very critical. This uniformity of the main considerations thickness, permeability and mass per unit area and the like. 4. There filtration performance, dust from performance measurement to cleaning dust, and to test the amount of dust through the outlet dust concentration in the process, for the next record for comparison. 5. Finally, is the use of high-definition microscope or a scanning electron microscope sample bag microscopic observation, under appropriate magnification observation of the sample structure, fouling, pollution and damage and other conditions; the infrared radiation of different wavelengths onto a bunch of molecular species some specific wavelength infrared radiation is absorbed to form the infrared absorption spectrum of molecules, each molecule are determined by its unique composition and structure of the infrared absorption spectrum, thus we can perform structural analysis and molecular identification, For example, identification of PPS filter, we can see slightly changed, in order to determine the extent of the corrosion. In short, to dust removal equipment bag sampling when there is according to the actual working conditions, safe operation.