The injection cycle refers to the time it takes for the pulse valve to work one cycle. It is one of the measures to stabilize the pressure loss of the precipitator. The length of the injection cycle is directly related to the amount of compressed air consumption for injection, the length of life of the filter bag, and the amount of consumables consumed. The factors affecting the pressure loss of the precipitator include the structure of the precipitator, the dust concentration of the inlet gas of the filter material, the nature of the dust, the filtration speed and the injection pressure. Adjusting the injection cycle is one of the main measures to change the pressure. When the inlet concentration or the filtration wind speed is low, the dust adhesion is small and the pressure loss is small, the injection cycle can be extended to reach a limited range. By adjusting the injection cycle, the dust collector can operate normally with the pressure loss remaining stable.
Bag filter design considerations:
(1) The installation location of the bag filter is mostly outdoor, and only a few small bag filter are installed in the room. According to the indoor and outdoor installation conditions, what kind of electrical system should be considered and whether a rain shelter be set up. The installation site must be surveyed both indoors and outdoors, or at a height, and must be prepared in advance for any obstacles that have passed along the route before the installation site, and must be used during the assembly process. Design and arrangement.
(2) If the bag filter is located in a corrosive dust environment. The structure of the bag filter and the anti-corrosion coating on the outer surface should be fully considered. The corresponding coating scheme should also be considered for the coasts and ships affected by seawater.
(3) When the bag filter is set at a height of 20 to 30 meters above the ground, it must be designed to withstand the wind pressure when it is fully exposed to the vertical surface of the largest surface. Dust collectors located in seismic areas must take into account the effects of seismic intensity.
(4) Baghouse dust collectors that use compressed air cleaning and cylinder-operated switching valves may not operate properly even if the moisture in the compressed air freezes. Compressed air quality should be specified in the design. At the same time, snow treatment measures need to be considered.
(5) The large bag filter must be assembled on the site, and the combined disassembly method is generally preferred. The small bag filter can be assembled in the factory and then transported to the site.
(6) Pulse bag filter When the filter bag is replaced, it is carried on the top of the filter. If the old filter bag is improperly placed, it will pollute the environment due to dust, and the design should consider the removal of the bag and the place where the bag is placed.
