There are many factors to consider when determining the size of dust bag filter bags. First of all, the length of dust bag filter bag, when dealing with the amount of smoke, filtration speed and dust bag filter bag the same diameter of the case, increase the dust bag filter bag length can reduce the number of filter bags, thereby reducing the area, reducing the cleaning system The electromagnetic valve, pulse valve, injection pipe and other components can save investment and shorten the cleaning cycle. However, on the other hand, the length of the filter bag is longer, and the dust collector box body must also be extended upwards. The strength of its components must be increased to increase the equipment cost. From the point of view of pulse injection, the full length of the dust bag filter bag must be effectively cleaned. Ash, must be applied at the end of the injection of sufficient energy, the longer the dust filter bag filter bag, the greater the energy required, the more easily damaged filter bag injection end; dust bag filter bag lengthened by the weight of filter material support Large, the tension is also increased, if the top of the filter bag tension is too large, the seam may be broken; online cleaning, the longer the filter bag, the greater the possibility of dust from the filter bag return to the filter bag; If off-line cleaning Therefore, the longer the dust filter bag filter bag, the longer the pause time after cleaning, and the slower the filtration and filtration of the dust-removing chamber. In addition, if the filter bag is too long, installation, maintenance, and inspection will be inconvenient; if the dust collector is installed indoors, Dust bag filter bag length is also subject to building height restrictions. From the perspective of past developments, from the mid-1950s to the mid-1970s, the dust bag length of pulse dust collectors generally did not exceed 3.6 mm, which increased to a maximum of 5 m in the 1980s and increased to 6 m in the 1990s. It has increased to 8-10m. This is mainly due to the fact that processing gas-intensive projects such as power plant boilers has led to the development of pulse dust collectors to increase the length of filter bags.
As for the dust bag filter bag diameter, and the use of the filter. Since all kinds of filter media have their scale width, to make full use of filter media, the filter bag diameter should be determined according to the width of the filter media. For example, a width of about 990mm fabric, leaving the necessary seam stitches, can be made into two 152mm diameter filter bags. The filter bag diameter also affects the size of the filter. For example, on a ground of about 7.5 m2, a filter bag with a diameter of 152 mm and a length of 3 m is used. The filter area is about 163 m2. If a filter bag with a diameter of 305 mm is used, it takes 4.3 m to get the same on the same area of the ground. Filter area. The thickness of the filter bag is also related to the required cleaning energy and the arrangement of the pulse valve. The longer filter bag in the commonly used pulse dust collector is generally 152mm in diameter; the short filter bag is generally 120 or 130mm in diameter.