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, the filter speed and dust bag filter bag diameter the same circumstances, 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 also has to be extended upwards. The strength of its components has to be increased to increase the equipment cost. From the viewpoint 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 bag filter bag dust, the greater the energy required, the filter bag will be more easily damaged at the 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 back 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 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, The dust filter bag length is also limited by the height of the building. Judging from past developments, the filter bag length of pulse dust collectors generally did not exceed 3.6 mm from the mid 1950s to the mid 1970s, 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 station boilers has led to the development of pulse dust collectors in the direction of increasing filter bag length.
As for the dust bag filter bag diameter, and the use of the filter. Since various kinds of filter media have their scale widths, to make full use of the filter media, the filter bag diameter should be determined according to the width of the filter media. For example, a fabric with a width of about 990mm, leaving the necessary seams, 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 7.5m2, a filter bag with a diameter of 152mm and a length of 3m is used. The filter area is about 163m2. If a filter bag with a diameter of 305mm is used, it takes 4.3m to obtain 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.